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authorAlbrecht Schlosser <albrechts.fltk@online.de>2009-09-18 11:11:32 +0000
committerAlbrecht Schlosser <albrechts.fltk@online.de>2009-09-18 11:11:32 +0000
commitaf556fc53b1e617fdc6d37f439ee82c2391fd03c (patch)
treed4dc83742493014e0660d9d01b084a036ac9a139
parentbede6e4810966c3bbdb444f2e7b245ab07579f56 (diff)
Updated the bundled libpng to v1.2.40 (released Sep. 10, 2009).
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6880 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Diffstat
-rw-r--r--CHANGES2
-rw-r--r--png/ANNOUNCE49
-rw-r--r--png/CHANGES176
-rw-r--r--png/INSTALL16
-rw-r--r--png/KNOWNBUG2
-rw-r--r--png/LICENSE8
-rw-r--r--png/README14
-rw-r--r--png/TODO1
-rw-r--r--png/Y2KINFO4
-rw-r--r--png/libpng.3339
-rw-r--r--png/libpng.txt307
-rw-r--r--png/libpngpf.34
-rw-r--r--png/png.52
-rw-r--r--png/png.c477
-rw-r--r--png/png.h388
-rw-r--r--png/pngconf.h131
-rw-r--r--png/pngerror.c51
-rw-r--r--png/pngget.c137
-rw-r--r--png/pngmem.c123
-rw-r--r--png/pngpread.c275
-rw-r--r--png/pngread.c116
-rw-r--r--png/pngrio.c63
-rw-r--r--png/pngrtran.c408
-rw-r--r--png/pngrutil.c215
-rw-r--r--png/pngset.c540
-rw-r--r--png/pngtrans.c73
-rw-r--r--png/pngwio.c111
-rw-r--r--png/pngwrite.c262
-rw-r--r--png/pngwtran.c21
-rw-r--r--png/pngwutil.c404
30 files changed, 2929 insertions, 1790 deletions
diff --git a/CHANGES b/CHANGES
index 58f71ff15..d63f15a4e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,6 @@
CHANGES IN FLTK 1.3.0
+ - Updated the bundled libpng to v1.2.40 (released Sep. 10, 2009)
- Fixed Fl_Choice contrast with light-on-dark settings (STR #2219)
- Fixed X server "lock", if a modal dialog window is opened
while a menu is active (STR #1986)
@@ -36,7 +37,6 @@ CHANGES IN FLTK 1.3.0
- Added drop box to utf8 test that will show the utf8 encoding
for the first dropped character
- Restructured the unittest application
- - Updated the bundled libpng to v1.2.35 (released 18 Feb. 2009)
- Fl_Preferences.H now doesn't include windows.h any more
(Windows only, STR #2173).
- Fl_Window::draw() now doesn't reset its x/y-coordinates to 0
diff --git a/png/ANNOUNCE b/png/ANNOUNCE
index 48b4e9604..b73bbb5eb 100644
--- a/png/ANNOUNCE
+++ b/png/ANNOUNCE
@@ -1,5 +1,5 @@
-Libpng 1.2.35 - February 14, 2009
+Libpng 1.2.40 - September 10, 2009
This is a public release of libpng, intended for use in production codes.
@@ -8,48 +8,49 @@ Files available for download:
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
- libpng-1.2.35.tar.gz
- libpng-1.2.35.tar.lzma
- (Get the lzma codec from <http://tukaani.org/lzma>).
- libpng-1.2.35.tar.bz2
+ libpng-1.2.40.tar.xz (LZMA-compressed, recommended)
+ libpng-1.2.40.tar.gz
+ libpng-1.2.40.tar.bz2
Source files with LF line endings (for Unix/Linux) without the
"configure" script
- libpng-1.2.35-no-config.tar.gz
- libpng-1.2.35-no-config.tar.lzma
- libpng-1.2.35-no-config.tar.bz2
+ libpng-1.2.40-no-config.tar.xz (LZMA-compressed, recommended)
+ libpng-1.2.40-no-config.tar.gz
+ libpng-1.2.40-no-config.tar.bz2
Source files with CRLF line endings (for Windows), without the
"configure" script
- lpng1235.zip
- lpng1235.7z
- lpng1235.tar.bz2
+ lpng1240.zip
+ lpng1240.7z
+ lpng1240.tar.bz2
Project files
- libpng-1.2.35-project-netware.zip
- libpng-1.2.35-project-wince.zip
+ libpng-1.2.40-project-netware.zip
+ libpng-1.2.40-project-wince.zip
Other information:
- libpng-1.2.35-README.txt
- libpng-1.2.35-KNOWNBUGS.txt
- libpng-1.2.35-LICENSE.txt
- libpng-1.2.35-Y2K-compliance.txt
- libpng-1.2.35-[previous version]-diff.txt
+ libpng-1.2.40-README.txt
+ libpng-1.2.40-KNOWNBUGS.txt
+ libpng-1.2.40-LICENSE.txt
+ libpng-1.2.40-Y2K-compliance.txt
+ libpng-1.2.40-[previous version]-diff.txt
-Changes since the last public release (1.2.34):
+Changes since the last public release (1.2.39):
-version 1.2.35 [February 14, 2009]
+version 1.2.40 [September 10, 2009]
- Zero out all arrays of pointers after png_malloc(). (Tavis Ormandy)
- Use png_memset() instead of a loop to intialize pointers. We realize
- this will not work on platforms where the NULL pointer is not all zeroes.
+ Removed an extra png_debug() recently added to png_write_find_filter().
+ Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
+ Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
-(subscription required; visit
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe) or to glennrp at users.sourceforge.net
diff --git a/png/CHANGES b/png/CHANGES
index 5c7c46707..9bb8ac88b 100644
--- a/png/CHANGES
+++ b/png/CHANGES
@@ -1,4 +1,4 @@
-
+/*
CHANGES - changes for libpng
version 0.2
@@ -539,7 +539,8 @@ version 1.0.5d [November 29, 1999]
Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
to applications a macro "PNG_USE_LOCAL_ARRAYS".
- #ifdef out all the new declarations when PNG_USE_GLOBAL_ARRAYS is defined.
+ Remove all the new declarations with #ifdef/#endif when
+ PNG_USE_GLOBAL_ARRAYS is defined.
Added PNG_EXPORT_VAR macro to accommodate making DLL's.
version 1.0.5e [November 30, 1999]
Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
@@ -1179,7 +1180,7 @@ version 1.2.4beta3 [June 28, 2002]
Plugged memory leak of row_buf in pngtest.c when there is a png_error().
Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
Added "test-installed" target to makefile.32sunu, makefile.64sunu,
- makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
+ makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
Added "test-installed" target to makefile.cygwin and makefile.sco.
@@ -1300,7 +1301,7 @@ version 1.2.6beta4 [July 28, 2004]
Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove
sequential read support.
Added some "#if PNG_WRITE_SUPPORTED" blocks.
- #ifdef'ed out some redundancy in png_malloc_default().
+ Removed some redundancy with #ifdef/#endif in png_malloc_default().
Use png_malloc instead of png_zalloc to allocate the pallete.
version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
Fixed buffer overflow vulnerability in png_handle_tRNS()
@@ -1370,7 +1371,8 @@ version 1.2.8beta1 [November 1, 2004]
Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
strip alpha operation in png_do_strip_filler().
Added PNG_1_2_X definition in pngconf.h
- #ifdef out png_info_init in png.c and png_read_init in pngread.c (as of 1.3.0)
+ Comment out with #ifdef/#endif png_info_init in png.c and png_read_init
+ in pngread.c (as of 1.3.0)
version 1.2.8beta2 [November 2, 2004]
Reduce color_type to a nonalpha type after strip alpha operation in
png_do_strip_filler().
@@ -1387,7 +1389,7 @@ version 1.2.8beta5 [November 20, 2004]
Use png_ptr->flags instead of png_ptr->transformations to pass
PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
compatibility.
- Revised handling of SPECIALBUILD, PRIVATEBUILD,
+ Revised handling of SPECIALBUILD, PRIVATEBUILD,
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
version 1.2.8rc1 [November 24, 2004]
Moved handling of BUILD macros from pngconf.h to png.h
@@ -1685,14 +1687,14 @@ version 1.2.16beta1 [January 6, 2007]
version 1.2.16beta2 [January 16, 2007]
Revised scripts/CMakeLists.txt
-
+
version 1.0.24, 1.2.16 [January 31, 2007]
No changes.
-
+
version 1.2.17beta1 [March 6, 2007]
Revised scripts/CMakeLists.txt to install both shared and static libraries.
Deleted a redundant line from pngset.c.
-
+
version 1.2.17beta2 [April 26, 2007]
Relocated misplaced test for png_ptr == NULL in pngpread.c
Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
@@ -1713,7 +1715,7 @@ version 1.2.17rc2 [May 8, 2007]
Added png_ptr->unknown_chunk to hold working unknown chunk data, so it
can be free'ed in case of error. Revised unknown chunk handling in
pngrutil.c and pngpread.c to use this structure.
-
+
version 1.2.17rc3 [May 8, 2007]
Revised symbol-handling in configure script.
@@ -1756,9 +1758,9 @@ version 1.2.19beta6 [May 22, 2007]
Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
version 1.2.19beta7 [May 22, 2007]
- Squelched png_squelch_warnings() in pnggccrd.c and added an
- #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
- the warnings that png_squelch_warnings was squelching.
+ Squelched png_squelch_warnings() in pnggccrd.c and added
+ an #ifdef PNG_MMX_CODE_SUPPORTED/#endif block around the declarations
+ that caused the warnings that png_squelch_warnings was squelching.
version 1.2.19beta8 [May 22, 2007]
Removed __MMX__ from test in pngconf.h.
@@ -2156,7 +2158,7 @@ version 1.2.29beta03 [May 2, 2008]
automake options.
Changed $(ECHO) to echo in Makefile.am and Makefile.in
Updated all configure files to autoconf-2.62
- #ifdef out pnggcrd.c code if using MSC_VER
+ Comment out pnggcrd.c code with #ifdef/#endif if using MSC_VER
version 1.2.29rc01 [May 4, 2008]
No changes.
@@ -2186,7 +2188,7 @@ version 1.2.30beta03 [July 6, 2008]
version 1.2.30beta04 [July 10, 2008]
Merged more cosmetic whitespace changes from libpng-1.4.0beta19.
-version 1.0.38rc01, 1.2.30rc01 [February 14, 2009]
+version 1.0.38rc01, 1.2.30rc01 [July 18, 2008]
No changes.
version 1.0.38rc02, 1.2.30rc02 [July 21, 2008]
@@ -2310,7 +2312,7 @@ version 1.0.42, 1.2.34 [December 18, 2008]
version 1.2.35beta01 [February 4, 2009]
Zero out some arrays of pointers after png_malloc(). (Tavis Ormandy)
-version 1.2.35beta02 [Feburary 4, 2009]
+version 1.2.35beta02 [February 4, 2009]
Zero out more arrays of pointers after png_malloc().
version 1.2.35beta03 [February 5, 2009]
@@ -2326,6 +2328,147 @@ version 1.2.35rc02 [February 12, 2009]
version 1.0.43 and 1.2.35 [February 14, 2009]
No changes.
+version 1.2.36beta01 [February 28, 2009]
+ Revised comments in png_set_read_fn() and png_set_write_fn().
+ Revised order of #ifdef's and indentation in png_debug definitions of png.h
+ bug introduced in libpng-1.2.34.
+
+version 1.2.36beta02 [March 21, 2009]
+ Use png_memset() after png_malloc() of big_row_buf when reading an
+ interlaced file, to avoid a possible UMR.
+ Undid recent revision of PNG_NO_STDIO version of png_write_flush(). Users
+ having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined.
+ Revised libpng*.txt documentation about use of png_write_flush().
+ Removed fflush() from pngtest.c.
+ Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
+
+version 1.2.36beta03 [March 27, 2009]
+ Relocated misplaced PNG_1_0_X define in png.h that caused the prototype
+ for png_set_strip_error_numbers() to be omitted from PNG_NO_ASSEMBLER_CODE
+ builds. This bug was introduced in libpng-1.2.15beta4.
+ Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
+
+version 1.2.36beta04 [April 5, 2009]
+ Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
+
+version 1.2.36beta05 [April 24, 2009]
+ Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
+ application code writers to bypass the check for multiple inclusion
+ of setjmp.h when they know that it is safe to ignore the situation.
+ Made some cosmetic changes to whitespace in pngtest output.
+ Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
+ "shadowed declaration" warning from gcc-4.3.3.
+ Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
+ warning about a global "gamma" variable in math.h on some platforms.
+
+version 1.2.36rc01 [April 30, 2009]
+ No changes.
+
+version 1.0.44 and 1.2.36 [May 7, 2009]
+ No changes.
+
+version 1.2.37beta01 [May 14, 2009]
+ Fixed inconsistency in pngrutil.c, introduced in libpng-1.2.36. The
+ memset() was using "png_ptr->rowbytes" instead of "row_bytes", which
+ the corresponding png_malloc() uses (Joe Drew).
+ Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
+ Updated some of the makefiles in the scripts directory (merged with
+ those in libpng-1.4.0beta57).
+
+version 1.2.37beta02 [May 19, 2009]
+ Fixed typo in libpng documentation (FILTER_AVE should be FILTER_AVG)
+ Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
+ Conditionally compile png_read_finish_row() which is not used by
+ progressive readers.
+ Added contrib/pngminim/preader to demonstrate building minimal progressive
+ decoder, based on contrib/gregbook with embedded libpng and zlib.
+
+version 1.2.37beta03 [May 20, 2009]
+ In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
+ is only one makefile in those directories, and revised the README files
+ accordingly.
+ Reformated sources in libpng style (3-space indentation, comment format)
+
+version 1.2.37rc01 [May 27, 2009]
+ No changes.
+
+versions 1.2.37 and 1.0.45 [June 4, 2009]
+ Reformatted several remaining "else statement;" and "if () statement;" into
+ two lines.
+ Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
+ and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
+ Added sections about the git repository and our coding style to the
+ documentation (merged from libpng-1.4.0beta62)
+ Added a section to the libpng documentation about using png_get_io_ptr()
+ in configure scripts to detect the presence of libpng.
+
+version 1.2.38beta01 [June 17, 2009]
+ Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
+ multiple times and to specify the sample order in the tRNS chunk,
+ because the ISO PNG specification has a typo in the tRNS table.
+ Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
+ PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
+ available for ignoring known chunks even when not saving unknown chunks.
+ Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
+ "#if defined()" and "if !defined()" where possible.
+ Added PNG_NO_HANDLE_AS_UNKNOWN in the PNG_LEGACY_SUPPORTED block of
+ pngconf.h, and moved the various unknown chunk macro definitions
+ outside of the PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
+
+version 1.0.46 [June 18, 2009]
+ Removed some editing cruft from scripts/libpng.pc.in and some makefiles.
+
+version 1.2.38rc01 [June 24, 2009]
+ No changes.
+
+version 1.2.38rc02 [June 29, 2009]
+ Added a reference to the libpng license in each source file.
+
+version 1.2.38rc03 [July 11, 2009]
+ Revised references to the libpng license in pngconf.h and contrib/visupng
+ source files.
+ Rebuilt configure scripts with autoconf-2.63.
+
+version 1.0.47 and 1.2.38 [July 16, 2009]
+ No changes.
+
+version 1.2.39beta01 [July 25, 2009]
+ Added a prototype for png_64bit_product() in png.c
+
+version 1.2.39beta02 [July 27, 2009]
+ Avoid a possible NULL dereference in debug build, in png_set_text_2().
+ (bug introduced in libpng-0.95, discovered by Evan Rouault)
+
+version 1.2.39beta03 [July 29, 2009]
+ Relocated new png_64_bit_product() prototype into png.h
+ Expanded the information about prototypes in the libpng style section of
+ the documentation.
+ Rebuilt configure scripts with autoconf-2.64.
+
+version 1.2.39beta04 [August 1, 2009]
+ Replaced *.tar.lzma with *.txz in distribution. Get the xz codec
+ from <http://tukaani.org/xz>.
+
+version 1.2.39beta05 [August 1, 2009]
+ Reject attempt to write iCCP chunk with negative embedded profile length
+ (JD Chen)
+
+version 1.2.39c01 [August 6, 2009]
+ No changes.
+
+version 1.2.39 and 1.0.48 [August 13, 2009]
+ No changes.
+
+version 1.2.40beta01 [August 20, 2009]
+ Removed an extra png_debug() recently added to png_write_find_filter().
+ Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
+
+version 1.2.40rc01 [September 2, 2009]
+ Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
+
+version 1.2.40 and 1.0.49 [September 10, 2009]
+ No changes.
+
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
@@ -2333,3 +2476,4 @@ to subscribe)
or to glennrp at users.sourceforge.net
Glenn R-P
+*/
diff --git a/png/INSTALL b/png/INSTALL
index 57957431b..2986ae3be 100644
--- a/png/INSTALL
+++ b/png/INSTALL
@@ -1,5 +1,5 @@
-Installing libpng version 1.2.35 - February 14, 2009
+Installing libpng version 1.2.40 - September 10, 2009
On Unix/Linux and similar systems, you can simply type
@@ -44,7 +44,7 @@ to have access to the zlib.h and zconf.h include files that
correspond to the version of zlib that's installed.
You can rename the directories that you downloaded (they
-might be called "libpng-1.2.35" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.2.40" or "lpng109" and "zlib-1.2.1"
or "zlib121") so that you have directories called "zlib" and "libpng".
Your directory structure should look like this:
@@ -101,9 +101,9 @@ include
CMakeLists.txt => "cmake" script
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
makefile.elf => Linux/ELF makefile symbol versioning,
- gcc, creates libpng12.so.0.1.2.35)
+ gcc, creates libpng12.so.0.1.2.40)
makefile.linux => Linux/ELF makefile
- (gcc, creates libpng12.so.0.1.2.35)
+ (gcc, creates libpng12.so.0.1.2.40)
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
makefile.knr => Archaic UNIX Makefile that converts files with
ansi2knr (Requires ansi2knr.c from
@@ -125,14 +125,14 @@ include
makefile.openbsd => OpenBSD makefile
makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
makefile.sggcc => Silicon Graphics (gcc,
- creates libpng12.so.0.1.2.35)
+ creates libpng12.so.0.1.2.40)
makefile.sunos => Sun makefile
makefile.solaris => Solaris 2.X makefile (gcc,
- creates libpng12.so.0.1.2.35)
+ creates libpng12.so.0.1.2.40)
makefile.solaris-x86 => Solaris/intelMMX 2.X makefile (gcc,
- creates libpng12.so.0.1.2.35)
+ creates libpng12.so.0.1.2.40)
makefile.so9 => Solaris 9 makefile (gcc,
- creates libpng12.so.0.1.2.35)
+ creates libpng12.so.0.1.2.40)
makefile.32sunu => Sun Ultra 32-bit makefile
makefile.64sunu => Sun Ultra 64-bit makefile
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
diff --git a/png/KNOWNBUG b/png/KNOWNBUG
index f38676738..5e0c96ff4 100644
--- a/png/KNOWNBUG
+++ b/png/KNOWNBUG
@@ -1,5 +1,5 @@
-Known bugs in libpng version 1.2.35
+Known bugs in libpng version 1.2.40
1. February 23, 2006: The custom makefiles don't build libpng with -lz.
diff --git a/png/LICENSE b/png/LICENSE
index 50b4041cc..93dd04a15 100644
--- a/png/LICENSE
+++ b/png/LICENSE
@@ -8,8 +8,10 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
If you modify libpng you may insert additional notices immediately following
this sentence.
-libpng versions 1.2.6, August 15, 2004, through 1.2.35, February 14, 2009, are
-Copyright (c) 2004, 2006-2008 Glenn Randers-Pehrson, and are
+This code is released under the libpng license.
+
+libpng versions 1.2.6, August 15, 2004, through 1.2.40, September 10, 2009, are
+Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
@@ -106,4 +108,4 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-February 14, 2009
+September 10, 2009
diff --git a/png/README b/png/README
index 6d57ac478..171b65a45 100644
--- a/png/README
+++ b/png/README
@@ -1,4 +1,4 @@
-README for libpng version 1.2.35 - February 14, 2009 (shared library 12.0)
+README for libpng version 1.2.40 - September 10, 2009 (shared library 12.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
@@ -194,11 +194,11 @@ Files in this distribution:
descrip.mms => VMS makefile for MMS or MMK
makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
makefile.elf => Linux/ELF makefile symbol versioning,
- gcc, creates libpng12.so.0.1.2.35)
+ gcc, creates libpng12.so.0.1.2.40)
makefile.linux => Linux/ELF makefile
- (gcc, creates libpng12.so.0.1.2.35)
+ (gcc, creates libpng12.so.0.1.2.40)
makefile.gcmmx => Linux/ELF makefile
- (gcc, creates libpng12.so.0.1.2.35,
+ (gcc, creates libpng12.so.0.1.2.40,
uses assembler code tuned for Intel MMX platform)
makefile.gcc => Generic makefile (gcc, creates static libpng.a)
makefile.knr => Archaic UNIX Makefile that converts files with
@@ -220,12 +220,12 @@ Files in this distribution:
makefile.openbsd => OpenBSD makefile
makefile.sgi => Silicon Graphics IRIX (cc, creates static lib)
makefile.sggcc => Silicon Graphics
- (gcc, creates libpng12.so.0.1.2.35)
+ (gcc, creates libpng12.so.0.1.2.40)
makefile.sunos => Sun makefile
makefile.solaris => Solaris 2.X makefile
- (gcc, creates libpng12.so.0.1.2.35)
+ (gcc, creates libpng12.so.0.1.2.40)
makefile.so9 => Solaris 9 makefile
- (gcc, creates libpng12.so.0.1.2.35)
+ (gcc, creates libpng12.so.0.1.2.40)
makefile.32sunu => Sun Ultra 32-bit makefile
makefile.64sunu => Sun Ultra 64-bit makefile
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
diff --git a/png/TODO b/png/TODO
index a5f639577..face7658c 100644
--- a/png/TODO
+++ b/png/TODO
@@ -22,3 +22,4 @@ Build gamma tables using fixed point (and do away with floating point entirely).
Use greater precision when changing to linear gamma for compositing against
background and doing rgb-to-gray transformation.
Investigate pre-incremented loop counters and other loop constructions.
+Add interpolated method of handling interlacing.
diff --git a/png/Y2KINFO b/png/Y2KINFO
index 91025618a..e31bb7f16 100644
--- a/png/Y2KINFO
+++ b/png/Y2KINFO
@@ -1,13 +1,13 @@
Y2K compliance in libpng:
=========================
- February 14, 2009
+ September 10, 2009
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
- upward through 1.2.35 are Y2K compliant. It is my belief that earlier
+ upward through 1.2.40 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer
diff --git a/png/libpng.3 b/png/libpng.3
index f5a8228c3..65b368624 100644
--- a/png/libpng.3
+++ b/png/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "February 14, 2009"
+.TH LIBPNG 3 "September 10, 2009"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.35
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.40
.SH SYNOPSIS
\fI\fB
@@ -821,18 +821,20 @@ Following is a copy of the libpng.txt file that accompanies libpng.
.SH LIBPNG.TXT
libpng.txt - A description on how to use and modify libpng
- libpng version 1.2.35 - February 14, 2009
+ libpng version 1.2.40 - September 10, 2009
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
- Copyright (c) 1998-2008 Glenn Randers-Pehrson
- For conditions of distribution and use, see copyright
- notice in png.h.
+ Copyright (c) 1998-2009 Glenn Randers-Pehrson
+
+ This document is released under the libpng license.
+ For conditions of distribution and use, see the disclaimer
+ and license in png.h
Based on:
- libpng versions 0.97, January 1998, through 1.2.35 - February 14, 2009
+ libpng versions 0.97, January 1998, through 1.2.40 - September 10, 2009
Updated and distributed by Glenn Randers-Pehrson
- Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ Copyright (c) 1998-2009 Glenn Randers-Pehrson
libpng 1.0 beta 6 version 0.96 May 28, 1997
Updated and distributed by Andreas Dilger
@@ -962,9 +964,10 @@ so if it doesn't work, you don't have much to undo. Of course, you
will also want to insure that you are, in fact, dealing with a PNG
file. Libpng provides a simple check to see if a file is a PNG file.
To use it, pass in the first 1 to 8 bytes of the file to the function
-png_sig_cmp(), and it will return 0 if the bytes match the corresponding
-bytes of the PNG signature, or nonzero otherwise. Of course, the more bytes
-you pass in, the greater the accuracy of the prediction.
+png_sig_cmp(), and it will return 0 (false) if the bytes match the
+corresponding bytes of the PNG signature, or nonzero (true) otherwise.
+Of course, the more bytes you pass in, the greater the accuracy of the
+prediction.
If you are intending to keep the file pointer open for use in libpng,
you must ensure you don't read more than 8 bytes from the beginning
@@ -1141,28 +1144,6 @@ To inform libpng about your function, use
png_set_read_status_fn(png_ptr, read_row_callback);
-.SS Width and height limits
-
-The PNG specification allows the width and height of an image to be as
-large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
-Since very few applications really need to process such large images,
-we have imposed an arbitrary 1-million limit on rows and columns.
-Larger images will be rejected immediately with a png_error() call. If
-you wish to override this limit, you can use
-
- png_set_user_limits(png_ptr, width_max, height_max);
-
-to set your own limits, or use width_max = height_max = 0x7fffffffL
-to allow all valid dimensions (libpng may reject some very large images
-anyway because of potential buffer overflow conditions).
-
-You should put this statement after you create the PNG structure and
-before calling png_read_info(), png_read_png(), or png_process_data().
-If you need to retrieve the limits that are being applied, use
-
- width_max = png_get_user_width_max(png_ptr);
- height_max = png_get_user_height_max(png_ptr);
-
.SS Unknown-chunk handling
Now you get to set the way the library processes unknown chunks in the
@@ -1228,6 +1209,27 @@ callback function:
(int)sizeof(unused_chunks)/5);
#endif
+.SS User limits
+
+The PNG specification allows the width and height of an image to be as
+large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
+Since very few applications really need to process such large images,
+we have imposed an arbitrary 1-million limit on rows and columns.
+Larger images will be rejected immediately with a png_error() call. If
+you wish to override this limit, you can use
+
+ png_set_user_limits(png_ptr, width_max, height_max);
+
+to set your own limits, or use width_max = height_max = 0x7fffffffL
+to allow all valid dimensions (libpng may reject some very large images
+anyway because of potential buffer overflow conditions).
+
+You should put this statement after you create the PNG structure and
+before calling png_read_info(), png_read_png(), or png_process_data().
+If you need to retrieve the limits that are being applied, use
+
+ width_max = png_get_user_width_max(png_ptr);
+ height_max = png_get_user_height_max(png_ptr);
.SS The high-level read interface
@@ -1671,9 +1673,6 @@ things.
As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
added. It expands the sample depth without changing tRNS to alpha.
-At the same time, png_set_gray_1_2_4_to_8() was deprecated, and it
-will be removed from a future version.
-
PNG can have files with 16 bits per channel. If you only can handle
8 bits per channel, this will strip the pixels down to 8 bit.
@@ -2525,7 +2524,7 @@ types.
PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE |
PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB |
PNG_FILTER_UP | PNG_FILTER_VALUE_UP |
- PNG_FILTER_AVE | PNG_FILTER_VALUE_AVE |
+ PNG_FILTER_AVG | PNG_FILTER_VALUE_AVG |
PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH|
PNG_ALL_FILTERS);
@@ -2615,10 +2614,14 @@ Some of the more important parts of the png_info are:
PNG_INTRAPIXEL_DIFFERENCING)
If you call png_set_IHDR(), the call must appear before any of the
-other png_set_*() functions, which might require access to some of
+other png_set_*() functions, because they might require access to some of
the IHDR settings. The remaining png_set_*() functions can be called
in any order.
+If you wish, you can reset the compression_type, interlace_type, or
+filter_method later by calling png_set_IHDR() again; if you do this, the
+width, height, bit_depth, and color_type must be the same in each call.
+
png_set_PLTE(png_ptr, info_ptr, palette,
num_palette);
palette - the palette for the file
@@ -2680,8 +2683,9 @@ in any order.
trans_values);
trans - array of transparent entries for
palette (PNG_INFO_tRNS)
- trans_values - graylevel or color sample values of
- the single transparent color for
+ trans_values - graylevel or color sample values
+ (in order red, green, blue) of the
+ single transparent color for
non-paletted images (PNG_INFO_tRNS)
num_trans - number of transparent entries
(PNG_INFO_tRNS)
@@ -2890,7 +2894,12 @@ transformations are permitted, enabled by the following masks.
PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
to transparency
PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
- PNG_TRANSFORM_STRIP_FILLER Strip out filler bytes.
+ PNG_TRANSFORM_STRIP_FILLER Strip out filler
+ bytes (deprecated).
+ PNG_TRANSFORM_STRIP_FILLER_BEFORE Strip out leading
+ filler bytes
+ PNG_TRANSFORM_STRIP_FILLER_AFTER Strip out trailing
+ filler bytes
If you have valid image data in the info structure (you can use
png_set_rows() to put image data in the info structure), simply do this:
@@ -3297,9 +3306,15 @@ The replacement I/O functions must have prototypes as follows:
png_bytep data, png_size_t length);
void user_flush_data(png_structp png_ptr);
+The user_read_data() function is responsible for detecting and
+handling end-of-data errors.
+
Supplying NULL for the read, write, or flush functions sets them back
-to using the default C stream functions. It is an error to read from
-a write stream, and vice versa.
+to using the default C stream functions, which expect the io_ptr to
+point to a standard *FILE structure. It is probably a mistake
+to use NULL for one of write_data_fn and output_flush_fn but not both
+of them, unless you have built libpng with PNG_NO_WRITE_FLUSH defined.
+It is an error to read from a write stream, and vice versa.
Error handling in libpng is done through png_error() and png_warning().
Errors handled through png_error() are fatal, meaning that png_error()
@@ -3404,11 +3419,12 @@ you may also have to change the memory allocators (png_malloc, etc.).
.SS Configuring for compiler xxx:
-All includes for libpng are in pngconf.h. If you need to add/change/delete
-an include, this is the place to do it. The includes that are not
-needed outside libpng are protected by the PNG_INTERNAL definition,
-which is only defined for those routines inside libpng itself. The
-files in libpng proper only include png.h, which includes pngconf.h.
+All includes for libpng are in pngconf.h. If you need to add, change
+or delete an include, this is the place to do it.
+The includes that are not needed outside libpng are protected by the
+PNG_INTERNAL definition, which is only defined for those routines inside
+libpng itself. The files in libpng proper only include png.h, which
+includes pngconf.h.
.SS Configuring zlib:
@@ -3477,7 +3493,7 @@ currently does not allocate the filter buffers until png_write_row()
is called for the first time.)
filters = PNG_FILTER_NONE | PNG_FILTER_SUB
- PNG_FILTER_UP | PNG_FILTER_AVE |
+ PNG_FILTER_UP | PNG_FILTER_AVG |
PNG_FILTER_PAETH | PNG_ALL_FILTERS;
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE,
@@ -3599,7 +3615,7 @@ When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
having level = 0 will be printed. There aren't any such statements in
this version of libpng, but if you insert some they will be printed.
-.SH VII. MNG support
+.SH VI. MNG support
The MNG specification (available at http://www.libpng.org/pub/mng) allows
certain extensions to PNG for PNG images that are embedded in MNG datastreams.
@@ -3624,7 +3640,7 @@ or any other MNG chunks; your application must provide its own support for
them. You may wish to consider using libmng (available at
http://www.libmng.com) instead.
-.SH VIII. Changes to Libpng from version 0.88
+.SH VII. Changes to Libpng from version 0.88
It should be noted that versions of libpng later than 0.96 are not
distributed by the original libpng author, Guy Schalnat, nor by
@@ -3673,15 +3689,202 @@ application:
png_uint_32 application_vn = PNG_LIBPNG_VER;
-.SH IX. Y2K Compliance in libpng
+.SH VIII. Changes to Libpng from version 1.0.x to 1.2.x
+
+Support for user memory management was enabled by default. To
+accomplish this, the functions png_create_read_struct_2(),
+png_create_write_struct_2(), png_set_mem_fn(), png_get_mem_ptr(),
+png_malloc_default(), and png_free_default() were added.
+
+Support for certain MNG features was enabled.
+
+Support for numbered error messages was added. However, we never got
+around to actually numbering the error messages. The function
+png_set_strip_error_numbers() was added (Note: the prototype for this
+function was inadvertently removed from png.h in PNG_NO_ASSEMBLER_CODE
+builds of libpng-1.2.15. It was restored in libpng-1.2.36).
+
+The png_malloc_warn() function was added at libpng-1.2.3. This issues
+a png_warning and returns NULL instead of aborting when it fails to
+acquire the requested memory allocation.
+
+Support for setting user limits on image width and height was enabled
+by default. The functions png_set_user_limits(), png_get_user_width_max(),
+and png_get_user_height_max() were added at libpng-1.2.6.
+
+The png_set_add_alpha() function was added at libpng-1.2.7.
-February 14, 2009
+The function png_set_expand_gray_1_2_4_to_8() was added at libpng-1.2.9.
+Unlike png_set_gray_1_2_4_to_8(), the new function does not expand the
+tRNS chunk to alpha. The png_set_gray_1_2_4_to_8() function is
+deprecated.
+
+A number of macro definitions in support of runtime selection of
+assembler code features (especially Intel MMX code support) were
+added at libpng-1.2.0:
+
+ PNG_ASM_FLAG_MMX_SUPPORT_COMPILED
+ PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
+ PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
+ PNG_ASM_FLAG_MMX_READ_INTERLACE
+ PNG_ASM_FLAG_MMX_READ_FILTER_SUB
+ PNG_ASM_FLAG_MMX_READ_FILTER_UP
+ PNG_ASM_FLAG_MMX_READ_FILTER_AVG
+ PNG_ASM_FLAG_MMX_READ_FILTER_PAETH
+ PNG_ASM_FLAGS_INITIALIZED
+ PNG_MMX_READ_FLAGS
+ PNG_MMX_FLAGS
+ PNG_MMX_WRITE_FLAGS
+ PNG_MMX_FLAGS
+
+We added the following functions in support of runtime
+selection of assembler code features:
+
+ png_get_mmx_flagmask()
+ png_set_mmx_thresholds()
+ png_get_asm_flags()
+ png_get_mmx_bitdepth_threshold()
+ png_get_mmx_rowbytes_threshold()
+ png_set_asm_flags()
+
+We replaced all of these functions with simple stubs in libpng-1.2.20,
+when the Intel assembler code was removed due to a licensing issue.
+
+.SH IX. (Omitted)
+
+.SH X. Detecting libpng
+
+The png_get_io_ptr() function has been present since libpng-0.88, has never
+changed, and is unaffected by conditional compilation macros. It is the
+best choice for use in configure scripts for detecting the presence of any
+libpng version since 0.88. In an autoconf "configure.in" you could use
+
+ AC_CHECK_LIB(png, png_get_io_ptr, ...
+
+.SH XI. Source code repository
+
+Since about February 2009, version 1.2.34, libpng has been under "git" source
+control. The git repository was built from old libpng-x.y.z.tar.gz files
+going back to version 0.70. You can access the git repository (read only)
+at
+
+ git://libpng.git.sourceforge.net/gitroot/libpng
+
+or you can browse it via "gitweb" at
+
+ http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng
+
+Patches can be sent to glennrp at users.sourceforge.net or to
+png-mng-implement at lists.sourceforge.net or you can upload them to
+the libpng bug tracker at
+
+ http://libpng.sourceforge.net
+
+.SH XII. Coding style
+
+Our coding style is similar to the "Allman" style, with curly
+braces on separate lines:
+
+ if (condition)
+ {
+ action;
+ }
+
+ else if (another condition)
+ {
+ another action;
+ }
+
+The braces can be omitted from simple one-line actions:
+
+ if (condition)
+ return (0);
+
+We use 3-space indentation, except for continued statements which
+are usually indented the same as the first line of the statement
+plus four more spaces.
+
+Comments appear with the leading "/*" at the same indentation as
+the statement that follows the comment:
+
+ /* Single-line comment */
+ statement;
+
+ /* Multiple-line
+ * comment
+ */
+ statement;
+
+Very short comments can be placed at the end of the statement
+to which they pertain:
+
+ statement; /* comment */
+
+We don't use C++ style ("//") comments. We have, however,
+used them in the past in some now-abandoned MMX assembler
+code.
+
+Functions and their curly braces are not indented, and
+exported functions are marked with PNGAPI:
+
+ /* This is a public function that is visible to
+ * application programers. It does thus-and-so.
+ */
+ void PNGAPI
+ png_exported_function(png_ptr, png_info, foo)
+ {
+ body;
+ }
+
+The prototypes for all exported functions appear in png.h,
+above the comment that says
+
+ /* Maintainer: Put new public prototypes here ... */
+
+We mark all non-exported functions with "/* PRIVATE */"":
+
+ void /* PRIVATE */
+ png_non_exported_function(png_ptr, png_info, foo)
+ {
+ body;
+ }
+
+The prototypes for non-exported functions (except for those in
+pngtest) appear in
+the PNG_INTERNAL section of png.h
+above the comment that says
+
+ /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
+
+The names of all exported functions and variables begin
+with "png_", and all publicly visible C preprocessor
+macros begin with "PNG_".
+
+We put a space after each comma and after each semicolon
+in "for" statments, and we put spaces before and after each
+C binary operator and after "for" or "while". We don't
+put a space between a typecast and the expression being
+cast, nor do we put one between a function name and the
+left parenthesis that follows it:
+
+ for (i = 2; i > 0; --i)
+ x[i] = a(x) + (int)b;
+
+We prefer #ifdef and #ifndef to #if defined() and if !defined()
+when there is only one macro being tested.
+
+Other rules can be inferred by inspecting the libpng
+source.
+
+.SH XIII. Y2K Compliance in libpng
+
+September 10, 2009
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.35 are Y2K compliant. It is my belief that earlier
+upward through 1.2.40 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that
@@ -3943,6 +4146,26 @@ the first widely used release:
1.2.35rc01-02 13 10235 12.so.0.35[.0]
1.0.43 10 10043 10.so.0.43[.0]
1.2.35 13 10235 12.so.0.35[.0]
+ 1.2.36beta01-05 13 10236 12.so.0.36[.0]
+ 1.2.36rc01 13 10236 12.so.0.36[.0]
+ 1.0.44 10 10044 10.so.0.44[.0]
+ 1.2.36 13 10236 12.so.0.36[.0]
+ 1.2.37beta01-03 13 10237 12.so.0.37[.0]
+ 1.2.37rc01 13 10237 12.so.0.37[.0]
+ 1.2.37 13 10237 12.so.0.37[.0]
+ 1.2.45 10 10045 12.so.0.45[.0]
+ 1.0.46 10 10046 10.so.0.46[.0]
+ 1.2.38beta01 13 10238 12.so.0.38[.0]
+ 1.2.38rc01-03 13 10238 12.so.0.38[.0]
+ 1.0.47 10 10047 10.so.0.47[.0]
+ 1.2.38 13 10238 12.so.0.38[.0]
+ 1.2.39beta01-05 13 10239 12.so.0.39[.0]
+ 1.2.39rc01 13 10239 12.so.0.39[.0]
+ 1.0.48 10 10048 10.so.0.48[.0]
+ 1.2.39 13 10239 12.so.0.39[.0]
+ 1.2.40rc01 13 10240 12.so.0.40[.0]
+ 1.0.49 10 10049 10.so.0.49[.0]
+ 1.2.40 13 10240 12.so.0.40[.0]
Henceforth the source version will match the shared-library minor
and patch numbers; the shared-library major version number will be
@@ -3998,7 +4221,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
-Libpng version 1.2.35 - February 14, 2009:
+Libpng version 1.2.40 - September 10, 2009:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@@ -4019,7 +4242,9 @@ included in the libpng distribution, the latter shall prevail.)
If you modify libpng you may insert additional notices immediately following
this sentence.
-libpng versions 1.2.6, August 15, 2004, through 1.2.35, February 14, 2009, are
+This code is released under the libpng license.
+
+libpng versions 1.2.6, August 15, 2004, through 1.2.40, September 10, 2009, are
Copyright (c) 2004,2006-2008 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
@@ -4118,7 +4343,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-February 14, 2009
+September 10, 2009
.\" end of man page
diff --git a/png/libpng.txt b/png/libpng.txt
index 61ff46c15..019c886b9 100644
--- a/png/libpng.txt
+++ b/png/libpng.txt
@@ -1,17 +1,19 @@
libpng.txt - A description on how to use and modify libpng
- libpng version 1.2.35 - February 14, 2009
+ libpng version 1.2.40 - September 10, 2009
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
- Copyright (c) 1998-2008 Glenn Randers-Pehrson
- For conditions of distribution and use, see copyright
- notice in png.h.
+ Copyright (c) 1998-2009 Glenn Randers-Pehrson
+
+ This document is released under the libpng license.
+ For conditions of distribution and use, see the disclaimer
+ and license in png.h
Based on:
- libpng versions 0.97, January 1998, through 1.2.35 - February 14, 2009
+ libpng versions 0.97, January 1998, through 1.2.40 - September 10, 2009
Updated and distributed by Glenn Randers-Pehrson
- Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ Copyright (c) 1998-2009 Glenn Randers-Pehrson
libpng 1.0 beta 6 version 0.96 May 28, 1997
Updated and distributed by Andreas Dilger
@@ -141,9 +143,10 @@ so if it doesn't work, you don't have much to undo. Of course, you
will also want to insure that you are, in fact, dealing with a PNG
file. Libpng provides a simple check to see if a file is a PNG file.
To use it, pass in the first 1 to 8 bytes of the file to the function
-png_sig_cmp(), and it will return 0 if the bytes match the corresponding
-bytes of the PNG signature, or nonzero otherwise. Of course, the more bytes
-you pass in, the greater the accuracy of the prediction.
+png_sig_cmp(), and it will return 0 (false) if the bytes match the
+corresponding bytes of the PNG signature, or nonzero (true) otherwise.
+Of course, the more bytes you pass in, the greater the accuracy of the
+prediction.
If you are intending to keep the file pointer open for use in libpng,
you must ensure you don't read more than 8 bytes from the beginning
@@ -320,28 +323,6 @@ To inform libpng about your function, use
png_set_read_status_fn(png_ptr, read_row_callback);
-Width and height limits
-
-The PNG specification allows the width and height of an image to be as
-large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
-Since very few applications really need to process such large images,
-we have imposed an arbitrary 1-million limit on rows and columns.
-Larger images will be rejected immediately with a png_error() call. If
-you wish to override this limit, you can use
-
- png_set_user_limits(png_ptr, width_max, height_max);
-
-to set your own limits, or use width_max = height_max = 0x7fffffffL
-to allow all valid dimensions (libpng may reject some very large images
-anyway because of potential buffer overflow conditions).
-
-You should put this statement after you create the PNG structure and
-before calling png_read_info(), png_read_png(), or png_process_data().
-If you need to retrieve the limits that are being applied, use
-
- width_max = png_get_user_width_max(png_ptr);
- height_max = png_get_user_height_max(png_ptr);
-
Unknown-chunk handling
Now you get to set the way the library processes unknown chunks in the
@@ -407,6 +388,27 @@ callback function:
(int)sizeof(unused_chunks)/5);
#endif
+User limits
+
+The PNG specification allows the width and height of an image to be as
+large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
+Since very few applications really need to process such large images,
+we have imposed an arbitrary 1-million limit on rows and columns.
+Larger images will be rejected immediately with a png_error() call. If
+you wish to override this limit, you can use
+
+ png_set_user_limits(png_ptr, width_max, height_max);
+
+to set your own limits, or use width_max = height_max = 0x7fffffffL
+to allow all valid dimensions (libpng may reject some very large images
+anyway because of potential buffer overflow conditions).
+
+You should put this statement after you create the PNG structure and
+before calling png_read_info(), png_read_png(), or png_process_data().
+If you need to retrieve the limits that are being applied, use
+
+ width_max = png_get_user_width_max(png_ptr);
+ height_max = png_get_user_height_max(png_ptr);
The high-level read interface
@@ -850,9 +852,6 @@ things.
As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
added. It expands the sample depth without changing tRNS to alpha.
-At the same time, png_set_gray_1_2_4_to_8() was deprecated, and it
-will be removed from a future version.
-
PNG can have files with 16 bits per channel. If you only can handle
8 bits per channel, this will strip the pixels down to 8 bit.
@@ -1704,7 +1703,7 @@ types.
PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE |
PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB |
PNG_FILTER_UP | PNG_FILTER_VALUE_UP |
- PNG_FILTER_AVE | PNG_FILTER_VALUE_AVE |
+ PNG_FILTER_AVG | PNG_FILTER_VALUE_AVG |
PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH|
PNG_ALL_FILTERS);
@@ -1794,10 +1793,14 @@ Some of the more important parts of the png_info are:
PNG_INTRAPIXEL_DIFFERENCING)
If you call png_set_IHDR(), the call must appear before any of the
-other png_set_*() functions, which might require access to some of
+other png_set_*() functions, because they might require access to some of
the IHDR settings. The remaining png_set_*() functions can be called
in any order.
+If you wish, you can reset the compression_type, interlace_type, or
+filter_method later by calling png_set_IHDR() again; if you do this, the
+width, height, bit_depth, and color_type must be the same in each call.
+
png_set_PLTE(png_ptr, info_ptr, palette,
num_palette);
palette - the palette for the file
@@ -1859,8 +1862,9 @@ in any order.
trans_values);
trans - array of transparent entries for
palette (PNG_INFO_tRNS)
- trans_values - graylevel or color sample values of
- the single transparent color for
+ trans_values - graylevel or color sample values
+ (in order red, green, blue) of the
+ single transparent color for
non-paletted images (PNG_INFO_tRNS)
num_trans - number of transparent entries
(PNG_INFO_tRNS)
@@ -2069,7 +2073,12 @@ transformations are permitted, enabled by the following masks.
PNG_TRANSFORM_INVERT_ALPHA Change alpha from opacity
to transparency
PNG_TRANSFORM_SWAP_ENDIAN Byte-swap 16-bit samples
- PNG_TRANSFORM_STRIP_FILLER Strip out filler bytes.
+ PNG_TRANSFORM_STRIP_FILLER Strip out filler
+ bytes (deprecated).
+ PNG_TRANSFORM_STRIP_FILLER_BEFORE Strip out leading
+ filler bytes
+ PNG_TRANSFORM_STRIP_FILLER_AFTER Strip out trailing
+ filler bytes
If you have valid image data in the info structure (you can use
png_set_rows() to put image data in the info structure), simply do this:
@@ -2476,9 +2485,15 @@ The replacement I/O functions must have prototypes as follows:
png_bytep data, png_size_t length);
void user_flush_data(png_structp png_ptr);
+The user_read_data() function is responsible for detecting and
+handling end-of-data errors.
+
Supplying NULL for the read, write, or flush functions sets them back
-to using the default C stream functions. It is an error to read from
-a write stream, and vice versa.
+to using the default C stream functions, which expect the io_ptr to
+point to a standard *FILE structure. It is probably a mistake
+to use NULL for one of write_data_fn and output_flush_fn but not both
+of them, unless you have built libpng with PNG_NO_WRITE_FLUSH defined.
+It is an error to read from a write stream, and vice versa.
Error handling in libpng is done through png_error() and png_warning().
Errors handled through png_error() are fatal, meaning that png_error()
@@ -2583,11 +2598,12 @@ you may also have to change the memory allocators (png_malloc, etc.).
Configuring for compiler xxx:
-All includes for libpng are in pngconf.h. If you need to add/change/delete
-an include, this is the place to do it. The includes that are not
-needed outside libpng are protected by the PNG_INTERNAL definition,
-which is only defined for those routines inside libpng itself. The
-files in libpng proper only include png.h, which includes pngconf.h.
+All includes for libpng are in pngconf.h. If you need to add, change
+or delete an include, this is the place to do it.
+The includes that are not needed outside libpng are protected by the
+PNG_INTERNAL definition, which is only defined for those routines inside
+libpng itself. The files in libpng proper only include png.h, which
+includes pngconf.h.
Configuring zlib:
@@ -2656,7 +2672,7 @@ currently does not allocate the filter buffers until png_write_row()
is called for the first time.)
filters = PNG_FILTER_NONE | PNG_FILTER_SUB
- PNG_FILTER_UP | PNG_FILTER_AVE |
+ PNG_FILTER_UP | PNG_FILTER_AVG |
PNG_FILTER_PAETH | PNG_ALL_FILTERS;
png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE,
@@ -2778,7 +2794,7 @@ When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
having level = 0 will be printed. There aren't any such statements in
this version of libpng, but if you insert some they will be printed.
-VII. MNG support
+VI. MNG support
The MNG specification (available at http://www.libpng.org/pub/mng) allows
certain extensions to PNG for PNG images that are embedded in MNG datastreams.
@@ -2803,7 +2819,7 @@ or any other MNG chunks; your application must provide its own support for
them. You may wish to consider using libmng (available at
http://www.libmng.com) instead.
-VIII. Changes to Libpng from version 0.88
+VII. Changes to Libpng from version 0.88
It should be noted that versions of libpng later than 0.96 are not
distributed by the original libpng author, Guy Schalnat, nor by
@@ -2852,15 +2868,202 @@ application:
png_uint_32 application_vn = PNG_LIBPNG_VER;
-IX. Y2K Compliance in libpng
+VIII. Changes to Libpng from version 1.0.x to 1.2.x
+
+Support for user memory management was enabled by default. To
+accomplish this, the functions png_create_read_struct_2(),
+png_create_write_struct_2(), png_set_mem_fn(), png_get_mem_ptr(),
+png_malloc_default(), and png_free_default() were added.
+
+Support for certain MNG features was enabled.
+
+Support for numbered error messages was added. However, we never got
+around to actually numbering the error messages. The function
+png_set_strip_error_numbers() was added (Note: the prototype for this
+function was inadvertently removed from png.h in PNG_NO_ASSEMBLER_CODE
+builds of libpng-1.2.15. It was restored in libpng-1.2.36).
+
+The png_malloc_warn() function was added at libpng-1.2.3. This issues
+a png_warning and returns NULL instead of aborting when it fails to
+acquire the requested memory allocation.
+
+Support for setting user limits on image width and height was enabled
+by default. The functions png_set_user_limits(), png_get_user_width_max(),
+and png_get_user_height_max() were added at libpng-1.2.6.
+
+The png_set_add_alpha() function was added at libpng-1.2.7.
+
+The function png_set_expand_gray_1_2_4_to_8() was added at libpng-1.2.9.
+Unlike png_set_gray_1_2_4_to_8(), the new function does not expand the
+tRNS chunk to alpha. The png_set_gray_1_2_4_to_8() function is
+deprecated.
+
+A number of macro definitions in support of runtime selection of
+assembler code features (especially Intel MMX code support) were
+added at libpng-1.2.0:
+
+ PNG_ASM_FLAG_MMX_SUPPORT_COMPILED
+ PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
+ PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
+ PNG_ASM_FLAG_MMX_READ_INTERLACE
+ PNG_ASM_FLAG_MMX_READ_FILTER_SUB
+ PNG_ASM_FLAG_MMX_READ_FILTER_UP
+ PNG_ASM_FLAG_MMX_READ_FILTER_AVG
+ PNG_ASM_FLAG_MMX_READ_FILTER_PAETH
+ PNG_ASM_FLAGS_INITIALIZED
+ PNG_MMX_READ_FLAGS
+ PNG_MMX_FLAGS
+ PNG_MMX_WRITE_FLAGS
+ PNG_MMX_FLAGS
+
+We added the following functions in support of runtime
+selection of assembler code features:
+
+ png_get_mmx_flagmask()
+ png_set_mmx_thresholds()
+ png_get_asm_flags()
+ png_get_mmx_bitdepth_threshold()
+ png_get_mmx_rowbytes_threshold()
+ png_set_asm_flags()
+
+We replaced all of these functions with simple stubs in libpng-1.2.20,
+when the Intel assembler code was removed due to a licensing issue.
+
+IX. (Omitted)
+
+X. Detecting libpng
+
+The png_get_io_ptr() function has been present since libpng-0.88, has never
+changed, and is unaffected by conditional compilation macros. It is the
+best choice for use in configure scripts for detecting the presence of any
+libpng version since 0.88. In an autoconf "configure.in" you could use
+
+ AC_CHECK_LIB(png, png_get_io_ptr, ...
+
+XI. Source code repository
+
+Since about February 2009, version 1.2.34, libpng has been under "git" source
+control. The git repository was built from old libpng-x.y.z.tar.gz files
+going back to version 0.70. You can access the git repository (read only)
+at
+
+ git://libpng.git.sourceforge.net/gitroot/libpng
+
+or you can browse it via "gitweb" at
+
+ http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng
+
+Patches can be sent to glennrp at users.sourceforge.net or to
+png-mng-implement at lists.sourceforge.net or you can upload them to
+the libpng bug tracker at
+
+ http://libpng.sourceforge.net
+
+XII. Coding style
+
+Our coding style is similar to the "Allman" style, with curly
+braces on separate lines:
+
+ if (condition)
+ {
+ action;
+ }
+
+ else if (another condition)
+ {
+ another action;
+ }
+
+The braces can be omitted from simple one-line actions:
+
+ if (condition)
+ return (0);
+
+We use 3-space indentation, except for continued statements which
+are usually indented the same as the first line of the statement
+plus four more spaces.
+
+Comments appear with the leading "/*" at the same indentation as
+the statement that follows the comment:
+
+ /* Single-line comment */
+ statement;
+
+ /* Multiple-line
+ * comment
+ */
+ statement;
+
+Very short comments can be placed at the end of the statement
+to which they pertain:
+
+ statement; /* comment */
+
+We don't use C++ style ("//") comments. We have, however,
+used them in the past in some now-abandoned MMX assembler
+code.
+
+Functions and their curly braces are not indented, and
+exported functions are marked with PNGAPI:
+
+ /* This is a public function that is visible to
+ * application programers. It does thus-and-so.
+ */
+ void PNGAPI
+ png_exported_function(png_ptr, png_info, foo)
+ {
+ body;
+ }
+
+The prototypes for all exported functions appear in png.h,
+above the comment that says
+
+ /* Maintainer: Put new public prototypes here ... */
+
+We mark all non-exported functions with "/* PRIVATE */"":
+
+ void /* PRIVATE */
+ png_non_exported_function(png_ptr, png_info, foo)
+ {
+ body;
+ }
+
+The prototypes for non-exported functions (except for those in
+pngtest) appear in
+the PNG_INTERNAL section of png.h
+above the comment that says
+
+ /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
+
+The names of all exported functions and variables begin
+with "png_", and all publicly visible C preprocessor
+macros begin with "PNG_".
+
+We put a space after each comma and after each semicolon
+in "for" statments, and we put spaces before and after each
+C binary operator and after "for" or "while". We don't
+put a space between a typecast and the expression being
+cast, nor do we put one between a function name and the
+left parenthesis that follows it:
+
+ for (i = 2; i > 0; --i)
+ x[i] = a(x) + (int)b;
+
+We prefer #ifdef and #ifndef to #if defined() and if !defined()
+when there is only one macro being tested.
+
+Other rules can be inferred by inspecting the libpng
+source.
+
+XIII. Y2K Compliance in libpng
-February 14, 2009
+September 10, 2009
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.35 are Y2K compliant. It is my belief that earlier
+upward through 1.2.40 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that
diff --git a/png/libpngpf.3 b/png/libpngpf.3
index 1e3e3d7b6..a1e030df0 100644
--- a/png/libpngpf.3
+++ b/png/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "February 14, 2009"
+.TH LIBPNGPF 3 "September 10, 2009"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.35
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.40
(private functions)
.SH SYNOPSIS
\fB#include <png.h>\fP
diff --git a/png/png.5 b/png/png.5
index 7c41f5232..30923ba11 100644
--- a/png/png.5
+++ b/png/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "February 14, 2009"
+.TH PNG 5 "September 10, 2009"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION
diff --git a/png/png.c b/png/png.c
index e7d14050f..be1bd3a14 100644
--- a/png/png.c
+++ b/png/png.c
@@ -1,11 +1,14 @@
/* png.c - location for general purpose libpng functions
*
- * Last changed in libpng 1.2.34 [December 18, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.39 [August 13, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
#define PNG_INTERNAL
@@ -13,7 +16,7 @@
#include "png.h"
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_35 Your_png_h_is_not_version_1_2_35;
+typedef version_1_2_40 Your_png_h_is_not_version_1_2_40;
/* Version information for C files. This had better match the version
* string defined in png.h. */
@@ -53,18 +56,18 @@ PNG_tRNS;
PNG_zTXt;
#ifdef PNG_READ_SUPPORTED
-/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-/* start of interlace block */
+/* Start of interlace block */
PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-/* offset to next interlace block */
+/* Offset to next interlace block */
PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-/* start of interlace block in the y direction */
+/* Start of interlace block in the y direction */
PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
-/* offset to next interlace block in the y direction */
+/* Offset to next interlace block in the y direction */
PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* Height of interlace block. This is not currently used - if you need
@@ -92,7 +95,8 @@ PNG_CONST int FARDATA png_pass_dsp_mask[]
void PNGAPI
png_set_sig_bytes(png_structp png_ptr, int num_bytes)
{
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_debug(1, "in png_set_sig_bytes");
if (num_bytes > 8)
png_error(png_ptr, "Too many bytes for PNG signature.");
@@ -144,7 +148,7 @@ png_check_sig(png_bytep sig, int num)
#ifdef PNG_1_0_X
voidpf PNGAPI
#else
-voidpf /* private */
+voidpf /* PRIVATE */
#endif
png_zalloc(voidpf png_ptr, uInt items, uInt size)
{
@@ -153,7 +157,8 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size)
png_uint_32 save_flags=p->flags;
png_uint_32 num_bytes;
- if (png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
if (items > PNG_UINT_32_MAX/size)
{
png_warning (p, "Potential overflow in png_zalloc()");
@@ -183,11 +188,11 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size)
return ((voidpf)ptr);
}
-/* function to free memory for zlib */
+/* Function to free memory for zlib */
#ifdef PNG_1_0_X
void PNGAPI
#else
-void /* private */
+void /* PRIVATE */
#endif
png_zfree(voidpf png_ptr, voidpf ptr)
{
@@ -241,7 +246,8 @@ png_create_info_struct(png_structp png_ptr)
png_infop info_ptr;
png_debug(1, "in png_create_info_struct");
- if (png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
png_ptr->malloc_fn, png_ptr->mem_ptr);
@@ -263,7 +269,8 @@ void PNGAPI
png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
{
png_infop info_ptr = NULL;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_debug(1, "in png_destroy_info_struct");
if (info_ptr_ptr != NULL)
@@ -302,18 +309,19 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
{
png_infop info_ptr = *ptr_ptr;
- if (info_ptr == NULL) return;
+ if (info_ptr == NULL)
+ return;
png_debug(1, "in png_info_init_3");
if (png_sizeof(png_info) > png_info_struct_size)
- {
- png_destroy_struct(info_ptr);
- info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
- *ptr_ptr = info_ptr;
- }
+ {
+ png_destroy_struct(info_ptr);
+ info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
+ *ptr_ptr = info_ptr;
+ }
- /* set everything to 0 */
+ /* Set everything to 0 */
png_memset(info_ptr, 0, png_sizeof(png_info));
}
@@ -344,245 +352,245 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
return;
#if defined(PNG_TEXT_SUPPORTED)
-/* free text item num or (if num == -1) all text items */
+ /* Free text item num or (if num == -1) all text items */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
+ if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_TEXT)
+ if (mask & PNG_FREE_TEXT)
#endif
-{
- if (num != -1)
{
- if (info_ptr->text && info_ptr->text[num].key)
- {
- png_free(png_ptr, info_ptr->text[num].key);
- info_ptr->text[num].key = NULL;
- }
- }
- else
- {
- int i;
- for (i = 0; i < info_ptr->num_text; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
- png_free(png_ptr, info_ptr->text);
- info_ptr->text = NULL;
- info_ptr->num_text=0;
+ if (num != -1)
+ {
+ if (info_ptr->text && info_ptr->text[num].key)
+ {
+ png_free(png_ptr, info_ptr->text[num].key);
+ info_ptr->text[num].key = NULL;
+ }
+ }
+ else
+ {
+ int i;
+ for (i = 0; i < info_ptr->num_text; i++)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
+ png_free(png_ptr, info_ptr->text);
+ info_ptr->text = NULL;
+ info_ptr->num_text=0;
+ }
}
-}
#endif
#if defined(PNG_tRNS_SUPPORTED)
-/* free any tRNS entry */
+ /* Free any tRNS entry */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
+ if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
#else
-if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
+ if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
#endif
-{
- png_free(png_ptr, info_ptr->trans);
- info_ptr->trans = NULL;
- info_ptr->valid &= ~PNG_INFO_tRNS;
+ {
+ png_free(png_ptr, info_ptr->trans);
+ info_ptr->trans = NULL;
+ info_ptr->valid &= ~PNG_INFO_tRNS;
#ifndef PNG_FREE_ME_SUPPORTED
- png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
+ png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
#endif
-}
+ }
#endif
#if defined(PNG_sCAL_SUPPORTED)
-/* free any sCAL entry */
+ /* Free any sCAL entry */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
+ if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_SCAL)
+ if (mask & PNG_FREE_SCAL)
#endif
-{
+ {
#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
- png_free(png_ptr, info_ptr->scal_s_width);
- png_free(png_ptr, info_ptr->scal_s_height);
- info_ptr->scal_s_width = NULL;
- info_ptr->scal_s_height = NULL;
+ png_free(png_ptr, info_ptr->scal_s_width);
+ png_free(png_ptr, info_ptr->scal_s_height);
+ info_ptr->scal_s_width = NULL;
+ info_ptr->scal_s_height = NULL;
#endif
- info_ptr->valid &= ~PNG_INFO_sCAL;
-}
+ info_ptr->valid &= ~PNG_INFO_sCAL;
+ }
#endif
#if defined(PNG_pCAL_SUPPORTED)
-/* free any pCAL entry */
+ /* Free any pCAL entry */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
+ if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_PCAL)
+ if (mask & PNG_FREE_PCAL)
#endif
-{
- png_free(png_ptr, info_ptr->pcal_purpose);
- png_free(png_ptr, info_ptr->pcal_units);
- info_ptr->pcal_purpose = NULL;
- info_ptr->pcal_units = NULL;
- if (info_ptr->pcal_params != NULL)
- {
- int i;
- for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
- {
- png_free(png_ptr, info_ptr->pcal_params[i]);
- info_ptr->pcal_params[i]=NULL;
- }
- png_free(png_ptr, info_ptr->pcal_params);
- info_ptr->pcal_params = NULL;
- }
- info_ptr->valid &= ~PNG_INFO_pCAL;
-}
+ {
+ png_free(png_ptr, info_ptr->pcal_purpose);
+ png_free(png_ptr, info_ptr->pcal_units);
+ info_ptr->pcal_purpose = NULL;
+ info_ptr->pcal_units = NULL;
+ if (info_ptr->pcal_params != NULL)
+ {
+ int i;
+ for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
+ {
+ png_free(png_ptr, info_ptr->pcal_params[i]);
+ info_ptr->pcal_params[i]=NULL;
+ }
+ png_free(png_ptr, info_ptr->pcal_params);
+ info_ptr->pcal_params = NULL;
+ }
+ info_ptr->valid &= ~PNG_INFO_pCAL;
+ }
#endif
#if defined(PNG_iCCP_SUPPORTED)
-/* free any iCCP entry */
+ /* Free any iCCP entry */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
+ if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_ICCP)
+ if (mask & PNG_FREE_ICCP)
#endif
-{
- png_free(png_ptr, info_ptr->iccp_name);
- png_free(png_ptr, info_ptr->iccp_profile);
- info_ptr->iccp_name = NULL;
- info_ptr->iccp_profile = NULL;
- info_ptr->valid &= ~PNG_INFO_iCCP;
-}
+ {
+ png_free(png_ptr, info_ptr->iccp_name);
+ png_free(png_ptr, info_ptr->iccp_profile);
+ info_ptr->iccp_name = NULL;
+ info_ptr->iccp_profile = NULL;
+ info_ptr->valid &= ~PNG_INFO_iCCP;
+ }
#endif
#if defined(PNG_sPLT_SUPPORTED)
-/* free a given sPLT entry, or (if num == -1) all sPLT entries */
+ /* Free a given sPLT entry, or (if num == -1) all sPLT entries */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
+ if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_SPLT)
+ if (mask & PNG_FREE_SPLT)
#endif
-{
- if (num != -1)
{
- if (info_ptr->splt_palettes)
+ if (num != -1)
{
- png_free(png_ptr, info_ptr->splt_palettes[num].name);
- png_free(png_ptr, info_ptr->splt_palettes[num].entries);
- info_ptr->splt_palettes[num].name = NULL;
- info_ptr->splt_palettes[num].entries = NULL;
+ if (info_ptr->splt_palettes)
+ {
+ png_free(png_ptr, info_ptr->splt_palettes[num].name);
+ png_free(png_ptr, info_ptr->splt_palettes[num].entries);
+ info_ptr->splt_palettes[num].name = NULL;
+ info_ptr->splt_palettes[num].entries = NULL;
+ }
+ }
+ else
+ {
+ if (info_ptr->splt_palettes_num)
+ {
+ int i;
+ for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
+
+ png_free(png_ptr, info_ptr->splt_palettes);
+ info_ptr->splt_palettes = NULL;
+ info_ptr->splt_palettes_num = 0;
+ }
+ info_ptr->valid &= ~PNG_INFO_sPLT;
}
}
- else
- {
- if (info_ptr->splt_palettes_num)
- {
- int i;
- for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
-
- png_free(png_ptr, info_ptr->splt_palettes);
- info_ptr->splt_palettes = NULL;
- info_ptr->splt_palettes_num = 0;
- }
- info_ptr->valid &= ~PNG_INFO_sPLT;
- }
-}
#endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- if (png_ptr->unknown_chunk.data)
- {
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
- }
+ if (png_ptr->unknown_chunk.data)
+ {
+ png_free(png_ptr, png_ptr->unknown_chunk.data);
+ png_ptr->unknown_chunk.data = NULL;
+ }
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
+ if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_UNKN)
+ if (mask & PNG_FREE_UNKN)
#endif
-{
- if (num != -1)
{
- if (info_ptr->unknown_chunks)
- {
- png_free(png_ptr, info_ptr->unknown_chunks[num].data);
- info_ptr->unknown_chunks[num].data = NULL;
- }
- }
- else
- {
- int i;
+ if (num != -1)
+ {
+ if (info_ptr->unknown_chunks)
+ {
+ png_free(png_ptr, info_ptr->unknown_chunks[num].data);
+ info_ptr->unknown_chunks[num].data = NULL;
+ }
+ }
+ else
+ {
+ int i;
- if (info_ptr->unknown_chunks_num)
- {
- for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
+ if (info_ptr->unknown_chunks_num)
+ {
+ for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
- png_free(png_ptr, info_ptr->unknown_chunks);
- info_ptr->unknown_chunks = NULL;
- info_ptr->unknown_chunks_num = 0;
- }
+ png_free(png_ptr, info_ptr->unknown_chunks);
+ info_ptr->unknown_chunks = NULL;
+ info_ptr->unknown_chunks_num = 0;
+ }
+ }
}
-}
#endif
#if defined(PNG_hIST_SUPPORTED)
-/* free any hIST entry */
+ /* Free any hIST entry */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
+ if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
#else
-if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
+ if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
#endif
-{
- png_free(png_ptr, info_ptr->hist);
- info_ptr->hist = NULL;
- info_ptr->valid &= ~PNG_INFO_hIST;
+ {
+ png_free(png_ptr, info_ptr->hist);
+ info_ptr->hist = NULL;
+ info_ptr->valid &= ~PNG_INFO_hIST;
#ifndef PNG_FREE_ME_SUPPORTED
- png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
+ png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
#endif
-}
+ }
#endif
-/* free any PLTE entry that was internally allocated */
+ /* Free any PLTE entry that was internally allocated */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
+ if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
#else
-if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
+ if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
#endif
-{
- png_zfree(png_ptr, info_ptr->palette);
- info_ptr->palette = NULL;
- info_ptr->valid &= ~PNG_INFO_PLTE;
+ {
+ png_zfree(png_ptr, info_ptr->palette);
+ info_ptr->palette = NULL;
+ info_ptr->valid &= ~PNG_INFO_PLTE;
#ifndef PNG_FREE_ME_SUPPORTED
- png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
+ png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
#endif
- info_ptr->num_palette = 0;
-}
+ info_ptr->num_palette = 0;
+ }
#if defined(PNG_INFO_IMAGE_SUPPORTED)
-/* free any image bits attached to the info structure */
+ /* Free any image bits attached to the info structure */
#ifdef PNG_FREE_ME_SUPPORTED
-if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
+ if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
#else
-if (mask & PNG_FREE_ROWS)
+ if (mask & PNG_FREE_ROWS)
#endif
-{
- if (info_ptr->row_pointers)
- {
- int row;
- for (row = 0; row < (int)info_ptr->height; row++)
- {
- png_free(png_ptr, info_ptr->row_pointers[row]);
- info_ptr->row_pointers[row]=NULL;
- }
- png_free(png_ptr, info_ptr->row_pointers);
- info_ptr->row_pointers=NULL;
- }
- info_ptr->valid &= ~PNG_INFO_IDAT;
-}
+ {
+ if (info_ptr->row_pointers)
+ {
+ int row;
+ for (row = 0; row < (int)info_ptr->height; row++)
+ {
+ png_free(png_ptr, info_ptr->row_pointers[row]);
+ info_ptr->row_pointers[row]=NULL;
+ }
+ png_free(png_ptr, info_ptr->row_pointers);
+ info_ptr->row_pointers=NULL;
+ }
+ info_ptr->valid &= ~PNG_INFO_IDAT;
+ }
#endif
#ifdef PNG_FREE_ME_SUPPORTED
if (num == -1)
- info_ptr->free_me &= ~mask;
+ info_ptr->free_me &= ~mask;
else
- info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
+ info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
#endif
}
@@ -597,12 +605,12 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
if (png_ptr->num_chunk_list)
{
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->chunk_list=NULL;
- png_ptr->num_chunk_list = 0;
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->chunk_list=NULL;
+ png_ptr->num_chunk_list = 0;
}
#endif
@@ -617,7 +625,8 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
png_voidp PNGAPI
png_get_io_ptr(png_structp png_ptr)
{
- if (png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
return (png_ptr->io_ptr);
}
@@ -633,7 +642,8 @@ void PNGAPI
png_init_io(png_structp png_ptr, png_FILE_p fp)
{
png_debug(1, "in png_init_io");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->io_ptr = (png_voidp)fp;
}
#endif
@@ -649,7 +659,8 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
- if (png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
@@ -693,9 +704,9 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
png_charp PNGAPI
png_get_copyright(png_structp png_ptr)
{
- png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
- return ((png_charp) "\n libpng version 1.2.35 - February 14, 2009\n\
- Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
+ png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
+ return ((png_charp) "\n libpng version 1.2.40 - September 10, 2009\n\
+ Copyright (c) 1998-2009 Glenn Randers-Pehrson\n\
Copyright (c) 1996-1997 Andreas Dilger\n\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
}
@@ -712,7 +723,7 @@ png_charp PNGAPI
png_get_libpng_ver(png_structp png_ptr)
{
/* Version of *.c files used when building libpng */
- png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
+ png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
return ((png_charp) PNG_LIBPNG_VER_STRING);
}
@@ -720,7 +731,7 @@ png_charp PNGAPI
png_get_header_ver(png_structp png_ptr)
{
/* Version of *.h files used when building libpng */
- png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
+ png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
return ((png_charp) PNG_LIBPNG_VER_STRING);
}
@@ -728,7 +739,7 @@ png_charp PNGAPI
png_get_header_version(png_structp png_ptr)
{
/* Returns longer string containing both version and date */
- png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
+ png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
return ((png_charp) PNG_HEADER_VERSION_STRING
#ifndef PNG_READ_SUPPORTED
" (NO READ SUPPORT)"
@@ -741,7 +752,7 @@ png_get_header_version(png_structp png_ptr)
int PNGAPI
png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
{
- /* check chunk_name and return "keep" value if it's on the list, else 0 */
+ /* Check chunk_name and return "keep" value if it's on the list, else 0 */
int i;
png_bytep p;
if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
@@ -758,7 +769,8 @@ png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
int PNGAPI
png_reset_zstream(png_structp png_ptr)
{
- if (png_ptr == NULL) return Z_STREAM_ERROR;
+ if (png_ptr == NULL)
+ return Z_STREAM_ERROR;
return (inflateReset(&png_ptr->zstream));
}
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
@@ -774,11 +786,11 @@ png_access_version_number(void)
#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
#if !defined(PNG_1_0_X)
-/* this function was added to libpng 1.2.0 */
+/* This function was added to libpng 1.2.0 */
int PNGAPI
png_mmx_support(void)
{
- /* obsolete, to be removed from libpng-1.4.0 */
+ /* Obsolete, to be removed from libpng-1.4.0 */
return -1;
}
#endif /* PNG_1_0_X */
@@ -791,54 +803,57 @@ png_mmx_support(void)
png_size_t PNGAPI
png_convert_size(size_t size)
{
- if (size > (png_size_t)-1)
- PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
- return ((png_size_t)size);
+ if (size > (png_size_t)-1)
+ PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
+ return ((png_size_t)size);
}
#endif /* PNG_SIZE_T */
/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */
#if defined(PNG_cHRM_SUPPORTED)
#if !defined(PNG_NO_CHECK_cHRM)
+
/*
- Multiply two 32-bit numbers, V1 and V2, using 32-bit
- arithmetic, to produce a 64 bit result in the HI/LO words.
-
- A B
- x C D
- ------
- AD || BD
-AC || CB || 0
-
- where A and B are the high and low 16-bit words of V1,
- C and D are the 16-bit words of V2, AD is the product of
- A and D, and X || Y is (X << 16) + Y.
+ * Multiply two 32-bit numbers, V1 and V2, using 32-bit
+ * arithmetic, to produce a 64 bit result in the HI/LO words.
+ *
+ * A B
+ * x C D
+ * ------
+ * AD || BD
+ * AC || CB || 0
+ *
+ * where A and B are the high and low 16-bit words of V1,
+ * C and D are the 16-bit words of V2, AD is the product of
+ * A and D, and X || Y is (X << 16) + Y.
*/
-void png_64bit_product (long v1, long v2, unsigned long *hi_product,
+void /* PRIVATE */
+png_64bit_product (long v1, long v2, unsigned long *hi_product,
unsigned long *lo_product)
{
- int a, b, c, d;
- long lo, hi, x, y;
+ int a, b, c, d;
+ long lo, hi, x, y;
- a = (v1 >> 16) & 0xffff;
- b = v1 & 0xffff;
- c = (v2 >> 16) & 0xffff;
- d = v2 & 0xffff;
+ a = (v1 >> 16) & 0xffff;
+ b = v1 & 0xffff;
+ c = (v2 >> 16) & 0xffff;
+ d = v2 & 0xffff;
- lo = b * d; /* BD */
- x = a * d + c * b; /* AD + CB */
- y = ((lo >> 16) & 0xffff) + x;
+ lo = b * d; /* BD */
+ x = a * d + c * b; /* AD + CB */
+ y = ((lo >> 16) & 0xffff) + x;
- lo = (lo & 0xffff) | ((y & 0xffff) << 16);
- hi = (y >> 16) & 0xffff;
+ lo = (lo & 0xffff) | ((y & 0xffff) << 16);
+ hi = (y >> 16) & 0xffff;
- hi += a * c; /* AC */
+ hi += a * c; /* AC */
- *hi_product = (unsigned long)hi;
- *lo_product = (unsigned long)lo;
+ *hi_product = (unsigned long)hi;
+ *lo_product = (unsigned long)lo;
}
-int /* private */
+
+int /* PRIVATE */
png_check_cHRM_fixed(png_structp png_ptr,
png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
diff --git a/png/png.h b/png/png.h
index 1de4ddd1f..d95339d7e 100644
--- a/png/png.h
+++ b/png/png.h
@@ -1,14 +1,16 @@
/* png.h - header file for PNG reference library
*
- * libpng version 1.2.35 - February 14, 2009
+ * libpng version 1.2.40 - September 10, 2009
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license (See LICENSE, below)
+ *
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.2.35 - February 14, 2009: Glenn
+ * libpng versions 0.97, January 1998, through 1.2.40 - September 10, 2009: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@@ -222,6 +224,27 @@
* 1.2.35rc01-02 13 10235 12.so.0.35[.0]
* 1.0.43 10 10043 10.so.0.43[.0]
* 1.2.35 13 10235 12.so.0.35[.0]
+ * 1.2.36beta01-05 13 10236 12.so.0.36[.0]
+ * 1.2.36rc01 13 10236 12.so.0.36[.0]
+ * 1.0.44 10 10044 10.so.0.44[.0]
+ * 1.2.36 13 10236 12.so.0.36[.0]
+ * 1.2.37beta01-03 13 10237 12.so.0.37[.0]
+ * 1.2.37rc01 13 10237 12.so.0.37[.0]
+ * 1.2.37 13 10237 12.so.0.37[.0]
+ * 1.2.45 10 10045 12.so.0.45[.0]
+ * 1.0.46 10 10046 10.so.0.46[.0]
+ * 1.2.38beta01 13 10238 12.so.0.38[.0]
+ * 1.2.38rc01-03 13 10238 12.so.0.38[.0]
+ * 1.0.47 10 10047 10.so.0.47[.0]
+ * 1.2.38 13 10238 12.so.0.38[.0]
+ * 1.2.39beta01-05 13 10239 12.so.0.39[.0]
+ * 1.2.39rc01 13 10239 12.so.0.39[.0]
+ * 1.0.48 10 10048 10.so.0.48[.0]
+ * 1.2.39 13 10239 12.so.0.39[.0]
+ * 1.2.40beta01 13 10240 12.so.0.40[.0]
+ * 1.2.40rc01 13 10240 12.so.0.40[.0]
+ * 1.0.49 10 10049 10.so.0.49[.0]
+ * 1.2.40 13 10240 12.so.0.40[.0]
*
* Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be
@@ -251,8 +274,10 @@
* If you modify libpng you may insert additional notices immediately following
* this sentence.
*
- * libpng versions 1.2.6, August 15, 2004, through 1.2.35, February 14, 2009, are
- * Copyright (c) 2004, 2006-2008 Glenn Randers-Pehrson, and are
+ * This code is released under the libpng license.
+ *
+ * libpng versions 1.2.6, August 15, 2004, through 1.2.40, September 10, 2009, are
+ * Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors:
*
@@ -363,13 +388,13 @@
* Y2K compliance in libpng:
* =========================
*
- * February 14, 2009
+ * September 10, 2009
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.2.35 are Y2K compliant. It is my belief that earlier
+ * upward through 1.2.40 are Y2K compliant. It is my belief that earlier
* versions were also Y2K compliant.
*
* Libpng only has three year fields. One is a 2-byte unsigned integer
@@ -425,9 +450,9 @@
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.35"
+#define PNG_LIBPNG_VER_STRING "1.2.40"
#define PNG_HEADER_VERSION_STRING \
- " libpng version 1.2.35 - February 14, 2009\n"
+ " libpng version 1.2.40 - September 10, 2009\n"
#define PNG_LIBPNG_VER_SONUM 0
#define PNG_LIBPNG_VER_DLLNUM 13
@@ -435,9 +460,10 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 2
-#define PNG_LIBPNG_VER_RELEASE 35
+#define PNG_LIBPNG_VER_RELEASE 40
/* This should match the numeric part of the final component of
- * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
+ * PNG_LIBPNG_VER_STRING, omitting any leading zero:
+ */
#define PNG_LIBPNG_VER_BUILD 0
@@ -447,7 +473,7 @@
#define PNG_LIBPNG_BUILD_RC 3
#define PNG_LIBPNG_BUILD_STABLE 4
#define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7
-
+
/* Release-Specific Flags */
#define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with
PNG_LIBPNG_BUILD_STABLE only */
@@ -462,15 +488,16 @@
* We must not include leading zeros.
* Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
* version 1.0.0 was mis-numbered 100 instead of 10000). From
- * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release */
-#define PNG_LIBPNG_VER 10235 /* 1.2.35 */
+ * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
+ */
+#define PNG_LIBPNG_VER 10240 /* 1.2.40 */
#ifndef PNG_VERSION_INFO_ONLY
-/* include the compression library's header */
+/* Include the compression library's header */
#include "zlib.h"
#endif
-/* include all user configurable info, including optional assembler routines */
+/* Include all user configurable info, including optional assembler routines */
#include "pngconf.h"
/*
@@ -478,12 +505,12 @@
/* Ref MSDN: Private as priority over Special
* VS_FF_PRIVATEBUILD File *was not* built using standard release
* procedures. If this value is given, the StringFileInfo block must
- * contain a PrivateBuild string.
+ * contain a PrivateBuild string.
*
* VS_FF_SPECIALBUILD File *was* built by the original company using
* standard release procedures but is a variation of the standard
* file of the same version number. If this value is given, the
- * StringFileInfo block must contain a SpecialBuild string.
+ * StringFileInfo block must contain a SpecialBuild string.
*/
#if defined(PNG_USER_PRIVATEBUILD)
@@ -545,14 +572,14 @@ extern "C" {
#define png_write_status_ptr_NULL NULL
#endif
-/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */
+/* Variables declared in png.c - only it needs to define PNG_NO_EXTERN */
#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
/* Version information for C files, stored in png.c. This had better match
* the version above.
*/
#ifdef PNG_USE_GLOBAL_ARRAYS
PNG_EXPORT_VAR (PNG_CONST char) png_libpng_ver[18];
- /* need room for 99.99.99beta99z */
+ /* Need room for 99.99.99beta99z */
#else
#define png_libpng_ver png_get_header_ver(NULL)
#endif
@@ -671,7 +698,8 @@ typedef png_text FAR * FAR * png_textpp;
#endif
/* Supported compression types for text in PNG files (tEXt, and zTXt).
- * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */
+ * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed.
+ */
#define PNG_TEXT_COMPRESSION_NONE_WR -3
#define PNG_TEXT_COMPRESSION_zTXt_WR -2
#define PNG_TEXT_COMPRESSION_NONE -1
@@ -698,7 +726,8 @@ typedef struct png_time_struct
typedef png_time FAR * png_timep;
typedef png_time FAR * FAR * png_timepp;
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
+ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
/* png_unknown_chunk is a structure to hold queued chunks for which there is
* no specific support. The idea is that we can use this to queue
* up private chunks for output even though the library doesn't actually
@@ -760,7 +789,7 @@ typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp;
*/
typedef struct png_info_struct
{
- /* the following are necessary for every PNG file */
+ /* The following are necessary for every PNG file */
png_uint_32 width; /* width of image in pixels (from IHDR) */
png_uint_32 height; /* height of image in pixels (from IHDR) */
png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */
@@ -933,8 +962,9 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
png_uint_32 free_me; /* flags items libpng is responsible for freeing */
#endif
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- /* storage for unknown chunks that the library doesn't recognize. */
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
+ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+ /* Storage for unknown chunks that the library doesn't recognize. */
png_unknown_chunkp unknown_chunks;
png_size_t unknown_chunks_num;
#endif
@@ -949,7 +979,7 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
#endif
#if defined(PNG_sPLT_SUPPORTED)
- /* data on sPLT chunks (there may be more than one). */
+ /* Data on sPLT chunks (there may be more than one). */
png_sPLT_tp splt_palettes;
png_uint_32 splt_palettes_num;
#endif
@@ -1164,10 +1194,10 @@ typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */
#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */
#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */
-#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* WRITE only, deprecated */
+#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only, deprecated */
/* Added to libpng-1.2.34 */
-#define PNG_TRANSFORM_STRIP_FILLER_BEFORE 0x0800 /* WRITE only */
-#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* WRITE only */
+#define PNG_TRANSFORM_STRIP_FILLER_BEFORE 0x0800 /* write only */
+#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */
/* Flags for MNG supported features */
#define PNG_FLAG_MNG_EMPTY_PLTE 0x01
@@ -1284,7 +1314,7 @@ struct png_struct_def
#endif /* PNG_bKGD_SUPPORTED */
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
- png_flush_ptr output_flush_fn;/* Function for flushing output */
+ png_flush_ptr output_flush_fn; /* Function for flushing output */
png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
png_uint_32 flush_rows; /* number of rows written since last flush */
#endif
@@ -1382,7 +1412,7 @@ struct png_struct_def
/* New members added in libpng-1.0.6 */
#ifdef PNG_FREE_ME_SUPPORTED
- png_uint_32 free_me; /* flags items libpng is responsible for freeing */
+ png_uint_32 free_me; /* flags items libpng is responsible for freeing */
#endif
#if defined(PNG_USER_CHUNKS_SUPPORTED)
@@ -1390,7 +1420,7 @@ struct png_struct_def
png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
#endif
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int num_chunk_list;
png_bytep chunk_list;
#endif
@@ -1408,7 +1438,7 @@ struct png_struct_def
#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
-/* changed from png_byte to png_uint_32 at version 1.2.0 */
+/* Changed from png_byte to png_uint_32 at version 1.2.0 */
#ifdef PNG_1_0_X
png_byte mng_features_permitted;
#else
@@ -1444,21 +1474,21 @@ struct png_struct_def
/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
#ifdef PNG_USER_MEM_SUPPORTED
- png_voidp mem_ptr; /* user supplied struct for mem functions */
- png_malloc_ptr malloc_fn; /* function for allocating memory */
- png_free_ptr free_fn; /* function for freeing memory */
+ png_voidp mem_ptr; /* user supplied struct for mem functions */
+ png_malloc_ptr malloc_fn; /* function for allocating memory */
+ png_free_ptr free_fn; /* function for freeing memory */
#endif
/* New member added in libpng-1.0.13 and 1.2.0 */
- png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
+ png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
#if defined(PNG_READ_DITHER_SUPPORTED)
/* The following three members were added at version 1.0.14 and 1.2.4 */
- png_bytep dither_sort; /* working sort array */
- png_bytep index_to_palette; /* where the original index currently is */
- /* in the palette */
- png_bytep palette_to_index; /* which original index points to this */
- /* palette color */
+ png_bytep dither_sort; /* working sort array */
+ png_bytep index_to_palette; /* where the original index currently is */
+ /* in the palette */
+ png_bytep palette_to_index; /* which original index points to this */
+ /* palette color */
#endif
/* New members added in libpng-1.0.16 and 1.2.6 */
@@ -1471,7 +1501,7 @@ struct png_struct_def
/* New member added in libpng-1.0.25 and 1.2.17 */
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- /* storage for unknown chunk that the library doesn't recognize. */
+ /* Storage for unknown chunk that the library doesn't recognize. */
png_unknown_chunk unknown_chunk;
#endif
@@ -1487,7 +1517,7 @@ struct png_struct_def
/* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
-typedef png_structp version_1_2_35;
+typedef png_structp version_1_2_40;
typedef png_struct FAR * FAR * png_structpp;
@@ -1591,7 +1621,7 @@ extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
-/* read the information before the actual image data. */
+/* Read the information before the actual image data. */
extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif
@@ -1604,11 +1634,11 @@ extern PNG_EXPORT(png_charp,png_convert_to_rfc1123)
#if !defined(_WIN32_WCE)
/* "time.h" functions are not supported on WindowsCE */
#if defined(PNG_WRITE_tIME_SUPPORTED)
-/* convert from a struct tm to png_time */
+/* Convert from a struct tm to png_time */
extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime,
struct tm FAR * ttime));
-/* convert from time_t to png_time. Uses gmtime() */
+/* Convert from time_t to png_time. Uses gmtime() */
extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime,
time_t ttime));
#endif /* PNG_WRITE_tIME_SUPPORTED */
@@ -1728,7 +1758,7 @@ extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr,
#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
-/* strip the second byte of information from a 16-bit depth file. */
+/* Strip the second byte of information from a 16-bit depth file. */
extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr));
#endif
@@ -1764,74 +1794,74 @@ extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows));
extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr));
#endif
-/* optional update palette with requested transformations */
+/* Optional update palette with requested transformations */
extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr));
-/* optional call to update the users info structure */
+/* Optional call to update the users info structure */
extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
-/* read one or more rows of image data. */
+/* Read one or more rows of image data. */
extern PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr,
png_bytepp row, png_bytepp display_row, png_uint_32 num_rows));
#endif
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
-/* read a row of data. */
+/* Read a row of data. */
extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr,
png_bytep row,
png_bytep display_row));
#endif
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
-/* read the whole image into memory at once. */
+/* Read the whole image into memory at once. */
extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr,
png_bytepp image));
#endif
-/* write a row of image data */
+/* Write a row of image data */
extern PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr,
png_bytep row));
-/* write a few rows of image data */
+/* Write a few rows of image data */
extern PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr,
png_bytepp row, png_uint_32 num_rows));
-/* write the image data */
+/* Write the image data */
extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr,
png_bytepp image));
-/* writes the end of the PNG file. */
+/* Writes the end of the PNG file. */
extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
-/* read the end of the PNG file. */
+/* Read the end of the PNG file. */
extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif
-/* free any memory associated with the png_info_struct */
+/* Free any memory associated with the png_info_struct */
extern PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr,
png_infopp info_ptr_ptr));
-/* free any memory associated with the png_struct and the png_info_structs */
+/* Free any memory associated with the png_struct and the png_info_structs */
extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp
png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
-/* free all memory used by the read (old method - NOT DLL EXPORTED) */
+/* Free all memory used by the read (old method - NOT DLL EXPORTED) */
extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr,
png_infop end_info_ptr));
-/* free any memory associated with the png_struct and the png_info_structs */
+/* Free any memory associated with the png_struct and the png_info_structs */
extern PNG_EXPORT(void,png_destroy_write_struct)
PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr));
-/* free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */
+/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */
extern void png_write_destroy PNGARG((png_structp png_ptr));
-/* set the libpng method of handling chunk CRC errors */
+/* Set the libpng method of handling chunk CRC errors */
extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr,
int crit_action, int ancil_action));
@@ -1859,7 +1889,7 @@ extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr,
* header file (zlib.h) for an explination of the compression functions.
*/
-/* set the filtering method(s) used by libpng. Currently, the only valid
+/* Set the filtering method(s) used by libpng. Currently, the only valid
* value for "method" is 0.
*/
extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method,
@@ -1987,6 +2017,11 @@ extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr));
* If buffered output is not used, then output_flush_fn can be set to NULL.
* If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time
* output_flush_fn will be ignored (and thus can be NULL).
+ * It is probably a mistake to use NULL for output_flush_fn if
+ * write_data_fn is not also NULL unless you have built libpng with
+ * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's
+ * default flush function, which uses the standard *FILE structure, will
+ * be used.
*/
extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr,
png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
@@ -2051,15 +2086,15 @@ extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr,
png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
png_progressive_end_ptr end_fn));
-/* returns the user pointer associated with the push read functions */
+/* Returns the user pointer associated with the push read functions */
extern PNG_EXPORT(png_voidp,png_get_progressive_ptr)
PNGARG((png_structp png_ptr));
-/* function to be called when data becomes available */
+/* Function to be called when data becomes available */
extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_bytep buffer, png_size_t buffer_size));
-/* function that combines rows. Not very much different than the
+/* Function that combines rows. Not very much different than the
* png_combine_row() call. Is this even used?????
*/
extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr,
@@ -2077,7 +2112,7 @@ extern PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr,
png_uint_32 size));
#endif
-/* frees a pointer allocated by png_malloc() */
+/* Frees a pointer allocated by png_malloc() */
extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr));
#if defined(PNG_1_0_X)
@@ -2094,11 +2129,12 @@ extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 free_me, int num));
#ifdef PNG_FREE_ME_SUPPORTED
/* Reassign responsibility for freeing existing data, whether allocated
- * by libpng or by the application */
+ * by libpng or by the application
+ */
extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
png_infop info_ptr, int freer, png_uint_32 mask));
#endif
-/* assignments for png_data_freer */
+/* Assignments for png_data_freer */
#define PNG_DESTROY_WILL_FREE_DATA 1
#define PNG_SET_WILL_FREE_DATA 1
#define PNG_USER_WILL_FREE_DATA 2
@@ -2182,11 +2218,13 @@ png_infop info_ptr));
#if defined(PNG_INFO_IMAGE_SUPPORTED)
/* Returns row_pointers, which is an array of pointers to scanlines that was
-returned from png_read_png(). */
+ * returned from png_read_png().
+ */
extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr,
png_infop info_ptr));
/* Set row_pointers, which is an array of pointers to scanlines for use
-by png_write_png(). */
+ * by png_write_png().
+ */
extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_bytepp row_pointers));
#endif
@@ -2487,8 +2525,8 @@ extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
#endif
#endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
-/* provide a list of chunks and how they are to be handled, if the built-in
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+/* Provide a list of chunks and how they are to be handled, if the built-in
handling or default unknown chunk handling is not desired. Any chunks not
listed will be handled in the default manner. The IHDR and IEND chunks
must not be listed.
@@ -2499,6 +2537,10 @@ extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
*/
extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp
png_ptr, int keep, png_bytep chunk_list, int num_chunks));
+PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep
+ chunk_name));
+#endif
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns));
extern PNG_EXPORT(void, png_set_unknown_chunk_location)
@@ -2506,14 +2548,11 @@ extern PNG_EXPORT(void, png_set_unknown_chunk_location)
extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp
png_ptr, png_infop info_ptr, png_unknown_chunkpp entries));
#endif
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep
- chunk_name));
-#endif
/* Png_free_data() will turn off the "valid" flag for anything it frees.
- If you need to turn it off for a chunk that your application has freed,
- you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */
+ * If you need to turn it off for a chunk that your application has freed,
+ * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK);
+ */
extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr,
png_infop info_ptr, int mask));
@@ -2556,64 +2595,73 @@ extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
#ifndef PNG_DEBUG_FILE
#define PNG_DEBUG_FILE stderr
#endif /* PNG_DEBUG_FILE */
+
#if (PNG_DEBUG > 1)
-#ifndef png_debug
-/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
- * non-ISO compilers */
-#ifdef __STDC__
-#define png_debug(l,m) \
-{ \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
-}
-#endif
-#ifndef png_debug1
-#define png_debug1(l,m,p1) \
-{ \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
-}
-#endif
-#ifndef png_debug2
-#define png_debug2(l,m,p1,p2) \
-{ \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
-}
-#endif
-#else /* __STDC __ */
-#ifndef png_debug
-#define png_debug(l,m) \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format);
-#endif
-#ifndef png_debug1
-#define png_debug1(l,m,p1) \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format,p1);
-#endif
-#ifndef png_debug2
-#define png_debug2(l,m,p1,p2) \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format,p1,p2);
-#endif
-#endif /* __STDC __ */
+/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on non-ISO
+ * compilers.
+ */
+# ifdef __STDC__
+# ifndef png_debug
+# define png_debug(l,m) \
+ { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
+ }
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) \
+ { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
+ }
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
+ }
+# endif
+# else /* __STDC __ */
+# ifndef png_debug
+# define png_debug(l,m) \
+ { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format); \
+ }
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) \
+ { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format,p1); \
+ }
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format,p1,p2); \
+ }
+# endif
+# endif /* __STDC __ */
#endif /* (PNG_DEBUG > 1) */
+
#endif /* _MSC_VER */
#endif /* (PNG_DEBUG > 0) */
#endif /* PNG_DEBUG */
@@ -2708,17 +2756,17 @@ extern PNG_EXPORT(void,png_set_mmx_thresholds)
#if !defined(PNG_1_0_X)
/* png.c, pnggccrd.c, or pngvcrd.c */
extern PNG_EXPORT(int,png_mmx_support) PNGARG((void));
+#endif /* PNG_1_0_X */
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
/* Strip the prepended error numbers ("#nnn ") from error and warning
- * messages before passing them to the error or warning handler. */
+ * messages before passing them to the error or warning handler.
+ */
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp
png_ptr, png_uint_32 strip_mode));
#endif
-#endif /* PNG_1_0_X */
-
/* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
extern PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp
@@ -2730,7 +2778,9 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
#endif
-/* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */
+/* Maintainer: Put new public prototypes here ^, in libpng.3, and in
+ * project defs
+ */
#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
/* With these routines we avoid an integer divide, which will be slower on
@@ -2759,7 +2809,7 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
(png_uint_32)(alpha)) + (png_uint_32)32768L); \
(composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
-#else /* standard method using integer division */
+#else /* Standard method using integer division */
# define png_composite(composite, fg, alpha, bg) \
(composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
@@ -2842,7 +2892,7 @@ extern PNG_EXPORT(void,png_save_uint_16)
#define PNG_HAVE_PNG_SIGNATURE 0x1000
#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
-/* flags for the transformations the PNG library does on the image data */
+/* Flags for the transformations the PNG library does on the image data */
#define PNG_BGR 0x0001
#define PNG_INTERLACE 0x0002
#define PNG_PACK 0x0004
@@ -2876,7 +2926,7 @@ extern PNG_EXPORT(void,png_save_uint_16)
/* 0x20000000L unused */
/* 0x40000000L unused */
-/* flags for png_create_struct */
+/* Flags for png_create_struct */
#define PNG_STRUCT_PNG 0x0001
#define PNG_STRUCT_INFO 0x0002
@@ -2886,7 +2936,7 @@ extern PNG_EXPORT(void,png_save_uint_16)
#define PNG_COST_SHIFT 3
#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
-/* flags for the png_ptr->flags rather than declaring a byte for each one */
+/* Flags for the png_ptr->flags rather than declaring a byte for each one */
#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002
#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004
@@ -2928,7 +2978,7 @@ extern PNG_EXPORT(void,png_save_uint_16)
#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \
PNG_FLAG_CRC_CRITICAL_MASK)
-/* save typing and make code easier to understand */
+/* Save typing and make code easier to understand */
#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \
abs((int)((c1).green) - (int)((c2).green)) + \
@@ -2941,15 +2991,16 @@ extern PNG_EXPORT(void,png_save_uint_16)
(( ((width) * ((png_uint_32)(pixel_bits))) + 7) >> 3) )
/* PNG_OUT_OF_RANGE returns true if value is outside the range
- ideal-delta..ideal+delta. Each argument is evaluated twice.
- "ideal" and "delta" should be constants, normally simple
- integers, "value" a variable. Added to libpng-1.2.6 JB */
+ * ideal-delta..ideal+delta. Each argument is evaluated twice.
+ * "ideal" and "delta" should be constants, normally simple
+ * integers, "value" a variable. Added to libpng-1.2.6 JB
+ */
#define PNG_OUT_OF_RANGE(value, ideal, delta) \
( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
-/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */
+/* Variables declared in png.c - only it needs to define PNG_NO_EXTERN */
#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
-/* place to hold the signature string for a PNG file. */
+/* Place to hold the signature string for a PNG file. */
#ifdef PNG_USE_GLOBAL_ARRAYS
PNG_EXPORT_VAR (PNG_CONST png_byte FARDATA) png_sig[8];
#else
@@ -3068,7 +3119,8 @@ PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr));
#endif
/* Next four functions are used internally as callbacks. PNGAPI is required
- * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. */
+ * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3.
+ */
PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr,
png_bytep data, png_size_t length));
@@ -3133,10 +3185,10 @@ PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr,
PNG_EXTERN void png_flush PNGARG((png_structp png_ptr));
#endif
-/* simple function to write the signature */
+/* Simple function to write the signature */
PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr));
-/* write various chunks */
+/* Write various chunks */
/* Write the IHDR chunk, and update the png_struct with the necessary
* information.
@@ -3288,12 +3340,12 @@ PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr));
#endif
-/* combine a row of data, dealing with alpha, etc. if requested */
+/* Combine a row of data, dealing with alpha, etc. if requested */
PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
int mask));
#if defined(PNG_READ_INTERLACING_SUPPORTED)
-/* expand an interlaced row */
+/* Expand an interlaced row */
/* OLD pre-1.0.9 interface:
PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
png_bytep row, int pass, png_uint_32 transformations));
@@ -3304,12 +3356,12 @@ PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
-/* grab pixels out of a row for an interlaced pass */
+/* Grab pixels out of a row for an interlaced pass */
PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
png_bytep row, int pass));
#endif
-/* unfilter a row */
+/* Unfilter a row */
PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter));
@@ -3320,16 +3372,16 @@ PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
/* Write out the filtered row. */
PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr,
png_bytep filtered_row));
-/* finish a row while reading, dealing with interlacing passes, etc. */
+/* Finish a row while reading, dealing with interlacing passes, etc. */
PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr));
-/* initialize the row buffers, etc. */
+/* Initialize the row buffers, etc. */
PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr));
-/* optional call to update the users info structure */
+/* Optional call to update the users info structure */
PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
png_infop info_ptr));
-/* these are the functions that do the transformations */
+/* These are the functions that do the transformations */
#if defined(PNG_READ_FILLER_SUPPORTED)
PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
png_bytep row, png_uint_32 filler, png_uint_32 flags));
@@ -3451,7 +3503,7 @@ PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info,
* then calls the appropriate callback for the chunk if it is valid.
*/
-/* decode the IHDR chunk */
+/* Decode the IHDR chunk */
PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr,
png_uint_32 length));
PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr,
@@ -3550,7 +3602,7 @@ PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
png_bytep chunk_name));
-/* handle the transformations for reading and writing */
+/* Handle the transformations for reading and writing */
PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr));
@@ -3653,6 +3705,14 @@ PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr,
png_fixed_point int_blue_y));
#endif
+#if defined(PNG_cHRM_SUPPORTED)
+#if !defined(PNG_NO_CHECK_cHRM)
+/* Added at libpng version 1.2.34 */
+PNG_EXTERN void png_64bit_product (long v1, long v2, unsigned long *hi_product,
+ unsigned long *lo_product);
+#endif
+#endif
+
/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
#endif /* PNG_INTERNAL */
@@ -3662,5 +3722,5 @@ PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr,
#endif
#endif /* PNG_VERSION_INFO_ONLY */
-/* do not put anything past this line */
+/* Do not put anything past this line */
#endif /* PNG_H */
diff --git a/png/pngconf.h b/png/pngconf.h
index 834f7e704..5530bdeed 100644
--- a/png/pngconf.h
+++ b/png/pngconf.h
@@ -1,11 +1,14 @@
/* pngconf.h - machine configurable file for libpng
*
- * libpng version 1.2.35 - February 14, 2009
- * For conditions of distribution and use, see copyright notice in png.h
+ * libpng version 1.2.40 - September 10, 2009
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
/* Any machine specific code is near the front of this file, so if you
@@ -19,7 +22,7 @@
#define PNG_1_2_X
-/*
+/*
* PNG_USER_CONFIG has to be defined on the compiler command line. This
* includes the resource compiler for Windows DLL configurations.
*/
@@ -39,7 +42,7 @@
/*
* Added at libpng-1.2.8
- *
+ *
* If you create a private DLL you need to define in "pngusr.h" the followings:
* #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
* the DLL was built>
@@ -50,8 +53,8 @@
* number and must match your private DLL name>
* e.g. // private DLL "libpng13gx.dll"
* #define PNG_USER_DLLFNAME_POSTFIX "gx"
- *
- * The following macros are also at your disposal if you want to complete the
+ *
+ * The following macros are also at your disposal if you want to complete the
* DLL VERSIONINFO structure.
* - PNG_USER_VERSIONINFO_COMMENTS
* - PNG_USER_VERSIONINFO_COMPANYNAME
@@ -147,9 +150,9 @@
* 'Cygwin' defines/defaults:
* PNG_BUILD_DLL -- (ignored) building the dll
* (no define) -- (ignored) building an application, linking to the dll
- * PNG_STATIC -- (ignored) building the static lib, or building an
+ * PNG_STATIC -- (ignored) building the static lib, or building an
* application that links to the static lib.
- * ALL_STATIC -- (ignored) building various static libs, or building an
+ * ALL_STATIC -- (ignored) building various static libs, or building an
* application that links to the static libs.
* Thus,
* a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
@@ -162,12 +165,12 @@
* PNG_BUILD_DLL
* PNG_STATIC
* (nothing) == PNG_USE_DLL
- *
+ *
* CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
- * of auto-import in binutils, we no longer need to worry about
+ * of auto-import in binutils, we no longer need to worry about
* __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
* we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
- * to __declspec() stuff. However, we DO need to worry about
+ * to __declspec() stuff. However, we DO need to worry about
* PNG_BUILD_DLL and PNG_STATIC because those change some defaults
* such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
*/
@@ -211,8 +214,8 @@
# if !defined(PNG_DLL)
# define PNG_DLL
# endif
-# endif
-# endif
+# endif
+# endif
# endif
#endif
@@ -314,21 +317,29 @@
#ifdef PNG_SETJMP_SUPPORTED
/* This is an attempt to force a single setjmp behaviour on Linux. If
* the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
+ *
+ * You can bypass this test if you know that your application uses exactly
+ * the same setjmp.h that was included when libpng was built. Only define
+ * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
+ * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
+ * while building a separate libpng library for general use.
*/
-# ifdef __linux__
-# ifdef _BSD_SOURCE
-# define PNG_SAVE_BSD_SOURCE
-# undef _BSD_SOURCE
-# endif
-# ifdef _SETJMP_H
- /* If you encounter a compiler error here, see the explanation
- * near the end of INSTALL.
- */
- __pngconf.h__ already includes setjmp.h;
- __dont__ include it again.;
-# endif
-# endif /* __linux__ */
+# ifndef PNG_SKIP_SETJMP_CHECK
+# ifdef __linux__
+# ifdef _BSD_SOURCE
+# define PNG_SAVE_BSD_SOURCE
+# undef _BSD_SOURCE
+# endif
+# ifdef _SETJMP_H
+ /* If you encounter a compiler error here, see the explanation
+ * near the end of INSTALL.
+ */
+ __pngconf.h__ in libpng already includes setjmp.h;
+ __dont__ include it again.;
+# endif
+# endif /* __linux__ */
+# endif /* PNG_SKIP_SETJMP_CHECK */
/* include setjmp.h for error handling */
# include <setjmp.h>
@@ -479,7 +490,7 @@
* iTXt support was added. iTXt support was turned off by default through
* libpng-1.2.x, to support old apps that malloc the png_text structure
* instead of calling png_set_text() and letting libpng malloc it. It
- * was turned on by default in libpng-1.3.0.
+ * will be turned on by default in libpng-1.4.0.
*/
#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
@@ -513,6 +524,7 @@
# define PNG_NO_FREE_ME
# define PNG_NO_READ_UNKNOWN_CHUNKS
# define PNG_NO_WRITE_UNKNOWN_CHUNKS
+# define PNG_NO_HANDLE_AS_UNKNOWN
# define PNG_NO_READ_USER_CHUNKS
# define PNG_NO_READ_iCCP
# define PNG_NO_WRITE_iCCP
@@ -542,7 +554,7 @@
# define PNG_FREE_ME_SUPPORTED
#endif
-#if defined(PNG_READ_SUPPORTED)
+#ifdef PNG_READ_SUPPORTED
#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
!defined(PNG_NO_READ_TRANSFORMS)
@@ -630,7 +642,7 @@
#endif /* PNG_READ_SUPPORTED */
-#if defined(PNG_WRITE_SUPPORTED)
+#ifdef PNG_WRITE_SUPPORTED
# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
!defined(PNG_NO_WRITE_TRANSFORMS)
@@ -733,7 +745,7 @@
# define PNG_EASY_ACCESS_SUPPORTED
#endif
-/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
+/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
* and removed from version 1.2.20. The following will be removed
* from libpng-1.4.0
*/
@@ -800,7 +812,6 @@
# define PNG_USER_HEIGHT_MAX 1000000L
#endif
-
/* Added at libpng-1.2.34 and 1.4.0 */
#ifndef PNG_STRING_NEWLINE
#define PNG_STRING_NEWLINE "\n"
@@ -933,14 +944,22 @@
# define PNG_READ_zTXt_SUPPORTED
# define PNG_zTXt_SUPPORTED
#endif
+#ifndef PNG_NO_READ_OPT_PLTE
+# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
+#endif /* optional PLTE chunk in RGB and RGBA images */
+#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
+ defined(PNG_READ_zTXt_SUPPORTED)
+# define PNG_READ_TEXT_SUPPORTED
+# define PNG_TEXT_SUPPORTED
+#endif
+
+#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
+
#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
# define PNG_UNKNOWN_CHUNKS_SUPPORTED
# endif
-# ifndef PNG_NO_HANDLE_AS_UNKNOWN
-# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# endif
#endif
#if !defined(PNG_NO_READ_USER_CHUNKS) && \
defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
@@ -953,17 +972,14 @@
# undef PNG_NO_HANDLE_AS_UNKNOWN
# endif
#endif
-#ifndef PNG_NO_READ_OPT_PLTE
-# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
-#endif /* optional PLTE chunk in RGB and RGBA images */
-#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
- defined(PNG_READ_zTXt_SUPPORTED)
-# define PNG_READ_TEXT_SUPPORTED
-# define PNG_TEXT_SUPPORTED
-#endif
-#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
+#ifndef PNG_NO_HANDLE_AS_UNKNOWN
+# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+# endif
+#endif
+#ifdef PNG_WRITE_SUPPORTED
#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
#ifdef PNG_NO_WRITE_TEXT
@@ -1075,17 +1091,6 @@
# define PNG_zTXt_SUPPORTED
# endif
#endif
-#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
-# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-# define PNG_UNKNOWN_CHUNKS_SUPPORTED
-# endif
-# ifndef PNG_NO_HANDLE_AS_UNKNOWN
-# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# endif
-# endif
-#endif
#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
defined(PNG_WRITE_zTXt_SUPPORTED)
# define PNG_WRITE_TEXT_SUPPORTED
@@ -1096,6 +1101,20 @@
#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
+#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
+# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
+# define PNG_UNKNOWN_CHUNKS_SUPPORTED
+# endif
+#endif
+
+#ifndef PNG_NO_HANDLE_AS_UNKNOWN
+# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+# endif
+#endif
+#endif /* PNG_WRITE_SUPPORTED */
+
/* Turn this off to disable png_read_png() and
* png_write_png() and leave the row_pointers member
* out of the info structure.
@@ -1241,7 +1260,7 @@ typedef char FAR * FAR * FAR * png_charppp;
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* SPC - Is this stuff deprecated? */
-/* It'll be removed as of libpng-1.3.0 - GR-P */
+/* It'll be removed as of libpng-1.4.0 - GR-P */
/* libpng typedefs for types in zlib. If zlib changes
* or another compression library is used, then change these.
* Eliminates need to change all the source files.
@@ -1314,7 +1333,7 @@ typedef z_stream FAR * png_zstreamp;
# define PNGAPI __cdecl
# undef PNG_IMPEXP
# define PNG_IMPEXP
-#endif
+#endif
/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
* you may get warnings regarding the linkage of png_zalloc and png_zfree.
diff --git a/png/pngerror.c b/png/pngerror.c
index 765217196..d68416b38 100644
--- a/png/pngerror.c
+++ b/png/pngerror.c
@@ -1,12 +1,15 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
- * Last changed in libpng 1.2.34 [December 18, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file provides a location for all error handling. Users who
* need special error handling are expected to write replacement functions
* and use png_set_error_fn() to use those functions. See the instructions
@@ -44,7 +47,7 @@ png_error(png_structp png_ptr, png_const_charp error_message)
{
if (*error_message == '#')
{
- /* Strip "#nnnn " from beginning of error message. */
+ /* Strip "#nnnn " from beginning of error message. */
int offset;
for (offset = 1; offset<15; offset++)
if (error_message[offset] == ' ')
@@ -217,7 +220,7 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (*error_message == '#')
{
- /* Strip "#nnnn " from beginning of warning message. */
+ /* Strip "#nnnn " from beginning of error message. */
int offset;
char error_number[16];
for (offset = 0; offset<15; offset++)
@@ -229,15 +232,23 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
if ((offset > 1) && (offset < 15))
{
error_number[offset - 1] = '\0';
- fprintf(stderr, "libpng error no. %s: %s\n", error_number,
- error_message + offset + 1);
+ fprintf(stderr, "libpng error no. %s: %s",
+ error_number, error_message + offset + 1);
+ fprintf(stderr, PNG_STRING_NEWLINE);
}
else
- fprintf(stderr, "libpng error: %s, offset=%d\n", error_message, offset);
+ {
+ fprintf(stderr, "libpng error: %s, offset=%d",
+ error_message, offset);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
}
else
#endif
- fprintf(stderr, "libpng error: %s\n", error_message);
+ {
+ fprintf(stderr, "libpng error: %s", error_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
#endif
#ifdef PNG_SETJMP_SUPPORTED
@@ -257,7 +268,7 @@ png_default_error(png_structp png_ptr, png_const_charp error_message)
PNG_ABORT();
#endif
#ifdef PNG_NO_CONSOLE_IO
- error_message = error_message; /* make compiler happy */
+ error_message = error_message; /* Make compiler happy */
#endif
}
@@ -285,19 +296,27 @@ png_default_warning(png_structp png_ptr, png_const_charp warning_message)
if ((offset > 1) && (offset < 15))
{
warning_number[offset + 1] = '\0';
- fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
- warning_message + offset);
+ fprintf(stderr, "libpng warning no. %s: %s",
+ warning_number, warning_message + offset);
+ fprintf(stderr, PNG_STRING_NEWLINE);
}
else
- fprintf(stderr, "libpng warning: %s\n", warning_message);
+ {
+ fprintf(stderr, "libpng warning: %s",
+ warning_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
}
else
# endif
- fprintf(stderr, "libpng warning: %s\n", warning_message);
+ {
+ fprintf(stderr, "libpng warning: %s", warning_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
#else
- warning_message = warning_message; /* make compiler happy */
+ warning_message = warning_message; /* Make compiler happy */
#endif
- png_ptr = png_ptr; /* make compiler happy */
+ png_ptr = png_ptr; /* Make compiler happy */
}
#endif /* PNG_NO_WARNINGS */
diff --git a/png/pngget.c b/png/pngget.c
index 3b2b64600..38e4f9eef 100644
--- a/png/pngget.c
+++ b/png/pngget.c
@@ -1,11 +1,15 @@
/* pngget.c - retrieval of values from info struct
*
- * Last changed in libpng 1.2.30 [August 15, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
*/
#define PNG_INTERNAL
@@ -17,6 +21,7 @@ png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->valid & flag);
+
else
return(0);
}
@@ -26,6 +31,7 @@ png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->rowbytes);
+
else
return(0);
}
@@ -36,20 +42,20 @@ png_get_rows(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->row_pointers);
+
else
return(0);
}
#endif
#ifdef PNG_EASY_ACCESS_SUPPORTED
-/* easy access to info, added in libpng-0.99 */
+/* Easy access to info, added in libpng-0.99 */
png_uint_32 PNGAPI
png_get_image_width(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->width;
- }
+
return (0);
}
@@ -57,9 +63,8 @@ png_uint_32 PNGAPI
png_get_image_height(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->height;
- }
+
return (0);
}
@@ -67,9 +72,8 @@ png_byte PNGAPI
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->bit_depth;
- }
+
return (0);
}
@@ -77,9 +81,8 @@ png_byte PNGAPI
png_get_color_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->color_type;
- }
+
return (0);
}
@@ -87,9 +90,8 @@ png_byte PNGAPI
png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->filter_type;
- }
+
return (0);
}
@@ -97,9 +99,8 @@ png_byte PNGAPI
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->interlace_type;
- }
+
return (0);
}
@@ -107,9 +108,8 @@ png_byte PNGAPI
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
- {
return info_ptr->compression_type;
- }
+
return (0);
}
@@ -121,9 +121,12 @@ png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
+
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
- else return (info_ptr->x_pixels_per_unit);
+
+ else
+ return (info_ptr->x_pixels_per_unit);
}
#else
return (0);
@@ -139,9 +142,12 @@ png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
+
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
- else return (info_ptr->y_pixels_per_unit);
+
+ else
+ return (info_ptr->y_pixels_per_unit);
}
#else
return (0);
@@ -157,10 +163,13 @@ png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
+
if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
return (0);
- else return (info_ptr->x_pixels_per_unit);
+
+ else
+ return (info_ptr->x_pixels_per_unit);
}
#else
return (0);
@@ -174,6 +183,7 @@ png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
+
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
@@ -184,7 +194,7 @@ png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
/(float)info_ptr->x_pixels_per_unit));
}
#else
- return (0.0);
+ return (0.0);
#endif
return ((float)0.0);
}
@@ -195,15 +205,19 @@ png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
+
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+
if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
- else return (info_ptr->x_offset);
+
+ else
+ return (info_ptr->x_offset);
}
#else
- return (0);
+ return (0);
#endif
return (0);
}
@@ -212,13 +226,17 @@ png_int_32 PNGAPI
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
+
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+
if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
- else return (info_ptr->y_offset);
+
+ else
+ return (info_ptr->y_offset);
}
#else
return (0);
@@ -230,13 +248,17 @@ png_int_32 PNGAPI
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
+
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
+
if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
- else return (info_ptr->x_offset);
+
+ else
+ return (info_ptr->x_offset);
}
#else
return (0);
@@ -248,13 +270,17 @@ png_int_32 PNGAPI
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
+
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+
if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
- else return (info_ptr->y_offset);
+
+ else
+ return (info_ptr->y_offset);
}
#else
return (0);
@@ -495,8 +521,9 @@ png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
png_debug1(1, "in %s retrieval function", "iCCP");
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
- /* compression_type is a dummy so the API won't have to change
- if we introduce multiple compression types later. */
+ /* Compression_type is a dummy so the API won't have to change
+ * if we introduce multiple compression types later.
+ */
*proflen = (int)info_ptr->iccp_proflen;
*compression_type = (int)info_ptr->iccp_compression;
return (PNG_INFO_iCCP);
@@ -549,22 +576,29 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
*height = info_ptr->height;
*bit_depth = info_ptr->bit_depth;
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
- png_error(png_ptr, "Invalid bit depth");
+ png_error(png_ptr, "Invalid bit depth");
+
*color_type = info_ptr->color_type;
+
if (info_ptr->color_type > 6)
- png_error(png_ptr, "Invalid color type");
+ png_error(png_ptr, "Invalid color type");
+
if (compression_type != NULL)
*compression_type = info_ptr->compression_type;
+
if (filter_type != NULL)
*filter_type = info_ptr->filter_type;
+
if (interlace_type != NULL)
*interlace_type = info_ptr->interlace_type;
- /* check for potential overflow of rowbytes */
+ /* Check for potential overflow of rowbytes */
if (*width == 0 || *width > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image width");
+
if (*height == 0 || *height > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image height");
+
if (info_ptr->width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
- 64 /* bigrowbuf hack */
@@ -575,6 +609,7 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
png_warning(png_ptr,
"Width too large for libpng to process image data.");
}
+
return (1);
}
return (0);
@@ -605,8 +640,8 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
png_charp *units, png_charpp *params)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
- && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
- nparams != NULL && units != NULL && params != NULL)
+ && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
+ nparams != NULL && units != NULL && params != NULL)
{
png_debug1(1, "in %s retrieval function", "pCAL");
*purpose = info_ptr->pcal_purpose;
@@ -629,7 +664,7 @@ png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
int *unit, double *width, double *height)
{
if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
+ (info_ptr->valid & PNG_INFO_sCAL))
{
*unit = info_ptr->scal_unit;
*width = info_ptr->scal_pixel_width;
@@ -645,7 +680,7 @@ png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
int *unit, png_charpp width, png_charpp height)
{
if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
+ (info_ptr->valid & PNG_INFO_sCAL))
{
*unit = info_ptr->scal_unit;
*width = info_ptr->scal_s_width;
@@ -669,16 +704,19 @@ png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
(info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "pHYs");
+
if (res_x != NULL)
{
*res_x = info_ptr->x_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
+
if (res_y != NULL)
{
*res_y = info_ptr->y_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
+
if (unit_type != NULL)
{
*unit_type = (int)info_ptr->phys_unit_type;
@@ -730,10 +768,13 @@ png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
png_debug1(1, "in %s retrieval function",
(png_ptr->chunk_name[0] == '\0' ? "text"
: (png_const_charp)png_ptr->chunk_name));
+
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
+
if (num_text != NULL)
*num_text = info_ptr->num_text;
+
return ((png_uint_32)info_ptr->num_text);
}
if (num_text != NULL)
@@ -773,6 +814,7 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
*trans = info_ptr->trans;
retval |= PNG_INFO_tRNS;
}
+
if (trans_values != NULL)
*trans_values = &(info_ptr->trans_values);
}
@@ -783,6 +825,7 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
*trans_values = &(info_ptr->trans_values);
retval |= PNG_INFO_tRNS;
}
+
if (trans != NULL)
*trans = NULL;
}
@@ -836,47 +879,47 @@ png_get_compression_buffer_size(png_structp png_ptr)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
#ifndef PNG_1_0_X
-/* this function was added to libpng 1.2.0 and should exist by default */
+/* This function was added to libpng 1.2.0 and should exist by default */
png_uint_32 PNGAPI
png_get_asm_flags (png_structp png_ptr)
{
- /* obsolete, to be removed from libpng-1.4.0 */
+ /* Obsolete, to be removed from libpng-1.4.0 */
return (png_ptr? 0L: 0L);
}
-/* this function was added to libpng 1.2.0 and should exist by default */
+/* This function was added to libpng 1.2.0 and should exist by default */
png_uint_32 PNGAPI
png_get_asm_flagmask (int flag_select)
{
- /* obsolete, to be removed from libpng-1.4.0 */
+ /* Obsolete, to be removed from libpng-1.4.0 */
flag_select=flag_select;
return 0L;
}
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
-/* this function was added to libpng 1.2.0 */
+/* This function was added to libpng 1.2.0 */
png_uint_32 PNGAPI
png_get_mmx_flagmask (int flag_select, int *compilerID)
{
- /* obsolete, to be removed from libpng-1.4.0 */
+ /* Obsolete, to be removed from libpng-1.4.0 */
flag_select=flag_select;
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
return 0L;
}
-/* this function was added to libpng 1.2.0 */
+/* This function was added to libpng 1.2.0 */
png_byte PNGAPI
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
{
- /* obsolete, to be removed from libpng-1.4.0 */
+ /* Obsolete, to be removed from libpng-1.4.0 */
return (png_ptr? 0: 0);
}
-/* this function was added to libpng 1.2.0 */
+/* This function was added to libpng 1.2.0 */
png_uint_32 PNGAPI
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
{
- /* obsolete, to be removed from libpng-1.4.0 */
+ /* Obsolete, to be removed from libpng-1.4.0 */
return (png_ptr? 0L: 0L);
}
#endif /* ?PNG_1_0_X */
@@ -895,6 +938,6 @@ png_get_user_height_max (png_structp png_ptr)
return (png_ptr? png_ptr->user_height_max : 0);
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
-
+
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
diff --git a/png/pngmem.c b/png/pngmem.c
index aeed12f76..e190cc3bf 100644
--- a/png/pngmem.c
+++ b/png/pngmem.c
@@ -1,12 +1,15 @@
/* pngmem.c - stub functions for memory allocation
*
- * Last changed in libpng 1.2.30 [August 15, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file provides a location for all memory allocation. Users who
* need special memory handling are expected to supply replacement
* functions for png_malloc() and png_free(), and to use
@@ -20,7 +23,7 @@
/* Borland DOS special memory handler */
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
-/* if you change this, be sure to change the one in png.h also */
+/* If you change this, be sure to change the one in png.h also */
/* Allocate memory for a png_struct. The malloc and memset can be replaced
by a single call to calloc() if this is thought to improve performance. */
@@ -40,14 +43,14 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
png_voidp struct_ptr;
if (type == PNG_STRUCT_INFO)
- size = png_sizeof(png_info);
+ size = png_sizeof(png_info);
else if (type == PNG_STRUCT_PNG)
- size = png_sizeof(png_struct);
+ size = png_sizeof(png_struct);
else
- return (png_get_copyright(NULL));
+ return (png_get_copyright(NULL));
#ifdef PNG_USER_MEM_SUPPORTED
- if(malloc_fn != NULL)
+ if (malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
@@ -56,7 +59,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
}
else
#endif /* PNG_USER_MEM_SUPPORTED */
- struct_ptr = (png_voidp)farmalloc(size);
+ struct_ptr = (png_voidp)farmalloc(size);
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
return (struct_ptr);
@@ -79,7 +82,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
if (struct_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
- if(free_fn != NULL)
+ if (free_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
@@ -121,10 +124,10 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
- if(png_ptr->malloc_fn != NULL)
- ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+ if (png_ptr->malloc_fn != NULL)
+ ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
else
- ret = (png_malloc_default(png_ptr, size));
+ ret = (png_malloc_default(png_ptr, size));
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory!");
return (ret);
@@ -149,12 +152,12 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
#endif
if (size != (size_t)size)
- ret = NULL;
+ ret = NULL;
else if (size == (png_uint_32)65536L)
{
if (png_ptr->offset_table == NULL)
{
- /* try to see if we need to do any of this fancy stuff */
+ /* Try to see if we need to do any of this fancy stuff */
ret = farmalloc(size);
if (ret == NULL || ((png_size_t)ret & 0xffff))
{
@@ -170,7 +173,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
ret = NULL;
}
- if(png_ptr->zlib_window_bits > 14)
+ if (png_ptr->zlib_window_bits > 14)
num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
else
num_blocks = 1;
@@ -209,7 +212,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
png_ptr->offset_table = table;
png_ptr->offset_table_ptr = farmalloc(num_blocks *
- png_sizeof (png_bytep));
+ png_sizeof(png_bytep));
if (png_ptr->offset_table_ptr == NULL)
{
@@ -269,10 +272,10 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
return (ret);
}
-/* free a pointer allocated by png_malloc(). In the default
- configuration, png_ptr is not used, but is passed in case it
- is needed. If ptr is NULL, return without taking any action. */
-
+/* Free a pointer allocated by png_malloc(). In the default
+ * configuration, png_ptr is not used, but is passed in case it
+ * is needed. If ptr is NULL, return without taking any action.
+ */
void PNGAPI
png_free(png_structp png_ptr, png_voidp ptr)
{
@@ -285,7 +288,8 @@ png_free(png_structp png_ptr, png_voidp ptr)
(*(png_ptr->free_fn))(png_ptr, ptr);
return;
}
- else png_free_default(png_ptr, ptr);
+ else
+ png_free_default(png_ptr, ptr);
}
void PNGAPI
@@ -293,7 +297,8 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
- if (png_ptr == NULL || ptr == NULL) return;
+ if (png_ptr == NULL || ptr == NULL)
+ return;
if (png_ptr->offset_table != NULL)
{
@@ -353,7 +358,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
- if(malloc_fn != NULL)
+ if (malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
@@ -369,7 +374,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
struct_ptr = (png_voidp)farmalloc(size);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
- struct_ptr = (png_voidp)halloc(size,1);
+ struct_ptr = (png_voidp)halloc(size, 1);
# else
struct_ptr = (png_voidp)malloc(size);
# endif
@@ -398,7 +403,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
if (struct_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
- if(free_fn != NULL)
+ if (free_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
@@ -420,10 +425,12 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
}
/* Allocate memory. For reasonable files, size should never exceed
- 64K. However, zlib may allocate more then 64K if you don't tell
- it not to. See zconf.h and png.h for more information. zlib does
- need to allocate exactly 64K, so whatever you call here must
- have the ability to do that. */
+ * 64K. However, zlib may allocate more then 64K if you don't tell
+ * it not to. See zconf.h and png.h for more information. zlib does
+ * need to allocate exactly 64K, so whatever you call here must
+ * have the ability to do that.
+ */
+
png_voidp PNGAPI
png_malloc(png_structp png_ptr, png_uint_32 size)
@@ -434,10 +441,10 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
if (png_ptr == NULL || size == 0)
return (NULL);
- if(png_ptr->malloc_fn != NULL)
- ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+ if (png_ptr->malloc_fn != NULL)
+ ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
else
- ret = (png_malloc_default(png_ptr, size));
+ ret = (png_malloc_default(png_ptr, size));
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory!");
return (ret);
@@ -464,23 +471,23 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
}
#endif
- /* Check for overflow */
+ /* Check for overflow */
#if defined(__TURBOC__) && !defined(__FLAT__)
- if (size != (unsigned long)size)
- ret = NULL;
- else
- ret = farmalloc(size);
+ if (size != (unsigned long)size)
+ ret = NULL;
+ else
+ ret = farmalloc(size);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
- if (size != (unsigned long)size)
- ret = NULL;
- else
- ret = halloc(size, 1);
+ if (size != (unsigned long)size)
+ ret = NULL;
+ else
+ ret = halloc(size, 1);
# else
- if (size != (size_t)size)
- ret = NULL;
- else
- ret = malloc((size_t)size);
+ if (size != (size_t)size)
+ ret = NULL;
+ else
+ ret = malloc((size_t)size);
# endif
#endif
@@ -493,7 +500,8 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
}
/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
- without taking any action. */
+ * without taking any action.
+ */
void PNGAPI
png_free(png_structp png_ptr, png_voidp ptr)
{
@@ -506,7 +514,8 @@ png_free(png_structp png_ptr, png_voidp ptr)
(*(png_ptr->free_fn))(png_ptr, ptr);
return;
}
- else png_free_default(png_ptr, ptr);
+ else
+ png_free_default(png_ptr, ptr);
}
void PNGAPI
png_free_default(png_structp png_ptr, png_voidp ptr)
@@ -542,9 +551,10 @@ png_malloc_warn(png_structp png_ptr, png_uint_32 size)
{
png_voidp ptr;
png_uint_32 save_flags;
- if(png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
- save_flags=png_ptr->flags;
+ save_flags = png_ptr->flags;
png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
png_ptr->flags=save_flags;
@@ -560,7 +570,7 @@ png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
size = (png_size_t)length;
if ((png_uint_32)size != length)
- png_error(png_ptr,"Overflow in png_memcpy_check.");
+ png_error(png_ptr, "Overflow in png_memcpy_check.");
return(png_memcpy (s1, s2, size));
}
@@ -573,7 +583,7 @@ png_memset_check (png_structp png_ptr, png_voidp s1, int value,
size = (png_size_t)length;
if ((png_uint_32)size != length)
- png_error(png_ptr,"Overflow in png_memset_check.");
+ png_error(png_ptr, "Overflow in png_memset_check.");
return (png_memset (s1, value, size));
@@ -589,9 +599,9 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
{
if (png_ptr != NULL)
{
- png_ptr->mem_ptr = mem_ptr;
- png_ptr->malloc_fn = malloc_fn;
- png_ptr->free_fn = free_fn;
+ png_ptr->mem_ptr = mem_ptr;
+ png_ptr->malloc_fn = malloc_fn;
+ png_ptr->free_fn = free_fn;
}
}
@@ -602,7 +612,8 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
png_voidp PNGAPI
png_get_mem_ptr(png_structp png_ptr)
{
- if(png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
return ((png_voidp)png_ptr->mem_ptr);
}
#endif /* PNG_USER_MEM_SUPPORTED */
diff --git a/png/pngpread.c b/png/pngpread.c
index b143673fc..7adb7b854 100644
--- a/png/pngpread.c
+++ b/png/pngpread.c
@@ -1,18 +1,21 @@
/* pngpread.c - read a png file in push mode
*
- * Last changed in libpng 1.2.32 [September 18, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.38 [July 16, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-/* push model modes */
+/* Push model modes */
#define PNG_READ_SIG_MODE 0
#define PNG_READ_CHUNK_MODE 1
#define PNG_READ_IDAT_MODE 2
@@ -27,7 +30,9 @@ void PNGAPI
png_process_data(png_structp png_ptr, png_infop info_ptr,
png_bytep buffer, png_size_t buffer_size)
{
- if(png_ptr == NULL || info_ptr == NULL) return;
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
png_push_restore_buffer(png_ptr, buffer, buffer_size);
while (png_ptr->buffer_size)
@@ -42,7 +47,9 @@ png_process_data(png_structp png_ptr, png_infop info_ptr,
void /* PRIVATE */
png_process_some_data(png_structp png_ptr, png_infop info_ptr)
{
- if(png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
+
switch (png_ptr->process_mode)
{
case PNG_READ_SIG_MODE:
@@ -50,22 +57,26 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
png_push_read_sig(png_ptr, info_ptr);
break;
}
+
case PNG_READ_CHUNK_MODE:
{
png_push_read_chunk(png_ptr, info_ptr);
break;
}
+
case PNG_READ_IDAT_MODE:
{
png_push_read_IDAT(png_ptr);
break;
}
+
#if defined(PNG_READ_tEXt_SUPPORTED)
case PNG_READ_tEXt_MODE:
{
png_push_read_tEXt(png_ptr, info_ptr);
break;
}
+
#endif
#if defined(PNG_READ_zTXt_SUPPORTED)
case PNG_READ_zTXt_MODE:
@@ -73,6 +84,7 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
png_push_read_zTXt(png_ptr, info_ptr);
break;
}
+
#endif
#if defined(PNG_READ_iTXt_SUPPORTED)
case PNG_READ_iTXt_MODE:
@@ -80,12 +92,14 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
png_push_read_iTXt(png_ptr, info_ptr);
break;
}
+
#endif
case PNG_SKIP_MODE:
{
png_push_crc_finish(png_ptr);
break;
}
+
default:
{
png_ptr->buffer_size = 0;
@@ -113,7 +127,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
num_to_check);
- png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes+num_to_check);
+ png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
{
@@ -209,7 +223,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
png_push_fill_buffer(png_ptr, chunk_length, 4);
- png_ptr->push_length = png_get_uint_31(png_ptr,chunk_length);
+ png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
@@ -217,20 +231,23 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- if(png_ptr->mode & PNG_AFTER_IDAT)
+ if (png_ptr->mode & PNG_AFTER_IDAT)
png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
{
if (png_ptr->push_length != 13)
png_error(png_ptr, "Invalid IHDR length");
+
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
{
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length);
}
+
else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
@@ -238,11 +255,13 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length);
png_ptr->process_mode = PNG_READ_DONE_MODE;
png_push_have_end(png_ptr, info_ptr);
}
+
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
else if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name))
{
@@ -251,20 +270,26 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
png_ptr->mode |= PNG_HAVE_IDAT;
+
png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
+
if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
png_ptr->mode |= PNG_HAVE_PLTE;
+
else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
!(png_ptr->mode & PNG_HAVE_PLTE))
png_error(png_ptr, "Missing PLTE before IDAT");
}
}
+
#endif
else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
{
@@ -275,23 +300,26 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
}
png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
}
+
else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
{
/* If we reach an IDAT chunk, this means we have read all of the
* header chunks, and we can start reading the image (or if this
* is called after the image has been read - we have an error).
*/
- if (!(png_ptr->mode & PNG_HAVE_IHDR))
- png_error(png_ptr, "Missing IHDR before IDAT");
- else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
- png_error(png_ptr, "Missing PLTE before IDAT");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before IDAT");
+
+ else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ !(png_ptr->mode & PNG_HAVE_PLTE))
+ png_error(png_ptr, "Missing PLTE before IDAT");
if (png_ptr->mode & PNG_HAVE_IDAT)
{
if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
- if (png_ptr->push_length == 0)
- return;
+ if (png_ptr->push_length == 0)
+ return;
if (png_ptr->mode & PNG_AFTER_IDAT)
png_error(png_ptr, "Too many IDAT's found");
@@ -305,6 +333,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_ptr->zstream.next_out = png_ptr->row_buf;
return;
}
+
#if defined(PNG_READ_gAMA_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4))
{
@@ -313,8 +342,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_sBIT_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4))
@@ -324,8 +355,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_cHRM_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4))
@@ -335,8 +368,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_sRGB_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
@@ -346,8 +381,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_iCCP_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
@@ -357,8 +394,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_sPLT_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
@@ -368,8 +407,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_tRNS_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4))
@@ -379,8 +420,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_bKGD_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4))
@@ -390,8 +433,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_hIST_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4))
@@ -401,8 +446,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_pHYs_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
@@ -412,8 +459,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_oFFs_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4))
@@ -423,9 +472,11 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
+
#if defined(PNG_READ_pCAL_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
{
@@ -434,8 +485,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_sCAL_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
@@ -445,8 +498,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_tIME_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
@@ -456,8 +511,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_tEXt_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
@@ -467,8 +524,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_zTXt_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
@@ -478,8 +537,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
#if defined(PNG_READ_iTXt_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
@@ -489,8 +550,10 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
+
png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
}
+
#endif
else
{
@@ -565,7 +628,9 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
{
png_bytep ptr;
- if(png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
+
ptr = buffer;
if (png_ptr->save_buffer_size)
{
@@ -589,6 +654,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
if (length < png_ptr->current_buffer_size)
save_size = length;
+
else
save_size = png_ptr->current_buffer_size;
@@ -606,7 +672,7 @@ png_push_save_buffer(png_structp png_ptr)
{
if (png_ptr->save_buffer_ptr != png_ptr->save_buffer)
{
- png_size_t i,istop;
+ png_size_t i, istop;
png_bytep sp;
png_bytep dp;
@@ -629,6 +695,7 @@ png_push_save_buffer(png_structp png_ptr)
{
png_error(png_ptr, "Potential overflow of save_buffer");
}
+
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr,
@@ -675,7 +742,7 @@ png_push_read_IDAT(png_structp png_ptr)
}
png_push_fill_buffer(png_ptr, chunk_length, 4);
- png_ptr->push_length = png_get_uint_31(png_ptr,chunk_length);
+ png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
@@ -697,16 +764,19 @@ png_push_read_IDAT(png_structp png_ptr)
if (png_ptr->idat_size < (png_uint_32)png_ptr->save_buffer_size)
{
save_size = (png_size_t)png_ptr->idat_size;
- /* check for overflow */
- if((png_uint_32)save_size != png_ptr->idat_size)
+
+ /* Check for overflow */
+ if ((png_uint_32)save_size != png_ptr->idat_size)
png_error(png_ptr, "save_size overflowed in pngpread");
}
else
save_size = png_ptr->save_buffer_size;
png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size);
+
png_ptr->idat_size -= save_size;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
@@ -719,8 +789,9 @@ png_push_read_IDAT(png_structp png_ptr)
if (png_ptr->idat_size < (png_uint_32)png_ptr->current_buffer_size)
{
save_size = (png_size_t)png_ptr->idat_size;
- /* check for overflow */
- if((png_uint_32)save_size != png_ptr->idat_size)
+
+ /* Check for overflow */
+ if ((png_uint_32)save_size != png_ptr->idat_size)
png_error(png_ptr, "save_size overflowed in pngpread");
}
else
@@ -760,7 +831,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
png_ptr->zstream.next_in = buffer;
png_ptr->zstream.avail_in = (uInt)buffer_length;
- for(;;)
+ for (;;)
{
ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
if (ret != Z_OK)
@@ -769,6 +840,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
{
if (png_ptr->zstream.avail_in)
png_error(png_ptr, "Extra compressed data");
+
if (!(png_ptr->zstream.avail_out))
{
png_push_process_row(png_ptr);
@@ -780,6 +852,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
}
else if (ret == Z_BUF_ERROR)
break;
+
else
png_error(png_ptr, "Decompression Error");
}
@@ -801,6 +874,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes;
png_ptr->zstream.next_out = png_ptr->row_buf;
}
+
else
break;
}
@@ -829,7 +903,7 @@ png_push_process_row(png_structp png_ptr)
png_do_read_transformations(png_ptr);
#if defined(PNG_READ_INTERLACING_SUPPORTED)
- /* blow up interlaced rows to full size */
+ /* Blow up interlaced rows to full size */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
@@ -847,9 +921,10 @@ png_push_process_row(png_structp png_ptr)
for (i = 0; i < 8 && png_ptr->pass == 0; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
- png_read_push_finish_row(png_ptr); /* updates png_ptr->pass */
+ png_read_push_finish_row(png_ptr); /* Updates png_ptr->pass */
}
- if (png_ptr->pass == 2) /* pass 1 might be empty */
+
+ if (png_ptr->pass == 2) /* Pass 1 might be empty */
{
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
@@ -857,6 +932,7 @@ png_push_process_row(png_structp png_ptr)
png_read_push_finish_row(png_ptr);
}
}
+
if (png_ptr->pass == 4 && png_ptr->height <= 4)
{
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
@@ -865,13 +941,16 @@ png_push_process_row(png_structp png_ptr)
png_read_push_finish_row(png_ptr);
}
}
+
if (png_ptr->pass == 6 && png_ptr->height <= 4)
{
png_push_have_row(png_ptr, png_bytep_NULL);
png_read_push_finish_row(png_ptr);
}
+
break;
}
+
case 1:
{
int i;
@@ -880,7 +959,8 @@ png_push_process_row(png_structp png_ptr)
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
- if (png_ptr->pass == 2) /* skip top 4 generated rows */
+
+ if (png_ptr->pass == 2) /* Skip top 4 generated rows */
{
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
@@ -888,22 +968,27 @@ png_push_process_row(png_structp png_ptr)
png_read_push_finish_row(png_ptr);
}
}
+
break;
}
+
case 2:
{
int i;
+
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
+
for (i = 0; i < 4 && png_ptr->pass == 2; i++)
{
png_push_have_row(png_ptr, png_bytep_NULL);
png_read_push_finish_row(png_ptr);
}
- if (png_ptr->pass == 4) /* pass 3 might be empty */
+
+ if (png_ptr->pass == 4) /* Pass 3 might be empty */
{
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
@@ -911,17 +996,21 @@ png_push_process_row(png_structp png_ptr)
png_read_push_finish_row(png_ptr);
}
}
+
break;
}
+
case 3:
{
int i;
+
for (i = 0; i < 4 && png_ptr->pass == 3; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
- if (png_ptr->pass == 4) /* skip top two generated rows */
+
+ if (png_ptr->pass == 4) /* Skip top two generated rows */
{
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
@@ -929,49 +1018,61 @@ png_push_process_row(png_structp png_ptr)
png_read_push_finish_row(png_ptr);
}
}
+
break;
}
+
case 4:
{
int i;
+
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
+
for (i = 0; i < 2 && png_ptr->pass == 4; i++)
{
png_push_have_row(png_ptr, png_bytep_NULL);
png_read_push_finish_row(png_ptr);
}
- if (png_ptr->pass == 6) /* pass 5 might be empty */
+
+ if (png_ptr->pass == 6) /* Pass 5 might be empty */
{
png_push_have_row(png_ptr, png_bytep_NULL);
png_read_push_finish_row(png_ptr);
}
+
break;
}
+
case 5:
{
int i;
+
for (i = 0; i < 2 && png_ptr->pass == 5; i++)
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
}
- if (png_ptr->pass == 6) /* skip top generated row */
+
+ if (png_ptr->pass == 6) /* Skip top generated row */
{
png_push_have_row(png_ptr, png_bytep_NULL);
png_read_push_finish_row(png_ptr);
}
+
break;
}
case 6:
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr);
+
if (png_ptr->pass != 6)
break;
+
png_push_have_row(png_ptr, png_bytep_NULL);
png_read_push_finish_row(png_ptr);
}
@@ -989,18 +1090,18 @@ void /* PRIVATE */
png_read_push_finish_row(png_structp png_ptr)
{
#ifdef PNG_USE_LOCAL_ARRAYS
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* start of interlace block */
+ /* Start of interlace block */
PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
- /* offset to next interlace block */
+ /* Offset to next interlace block */
PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
- /* start of interlace block in the y direction */
+ /* Start of interlace block in the y direction */
PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
- /* offset to next interlace block in the y direction */
+ /* Offset to next interlace block in the y direction */
PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* Height of interlace block. This is not currently used - if you need
@@ -1013,6 +1114,7 @@ png_read_push_finish_row(png_structp png_ptr)
if (png_ptr->row_number < png_ptr->num_rows)
return;
+#if defined(PNG_READ_INTERLACING_SUPPORTED)
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
@@ -1028,27 +1130,29 @@ png_read_push_finish_row(png_structp png_ptr)
if (png_ptr->pass > 7)
png_ptr->pass--;
+
if (png_ptr->pass >= 7)
break;
- png_ptr->iwidth = (png_ptr->width +
+ png_ptr->iwidth = (png_ptr->width +
png_pass_inc[png_ptr->pass] - 1 -
png_pass_start[png_ptr->pass]) /
png_pass_inc[png_ptr->pass];
- png_ptr->irowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,
- png_ptr->iwidth) + 1;
+ png_ptr->irowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,
+ png_ptr->iwidth) + 1;
- if (png_ptr->transformations & PNG_INTERLACE)
- break;
+ if (png_ptr->transformations & PNG_INTERLACE)
+ break;
- png_ptr->num_rows = (png_ptr->height +
+ png_ptr->num_rows = (png_ptr->height +
png_pass_yinc[png_ptr->pass] - 1 -
png_pass_ystart[png_ptr->pass]) /
png_pass_yinc[png_ptr->pass];
} while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
}
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
}
#if defined(PNG_READ_tEXt_SUPPORTED)
@@ -1059,7 +1163,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
png_error(png_ptr, "Out of place tEXt");
- info_ptr = info_ptr; /* to quiet some compiler warnings */
+ info_ptr = info_ptr; /* To quiet some compiler warnings */
}
#ifdef PNG_MAX_MALLOC_64K
@@ -1074,7 +1178,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_uint_32)(length+1));
+ (png_uint_32)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1091,8 +1195,10 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
if (png_ptr->buffer_size < png_ptr->current_text_left)
text_size = png_ptr->buffer_size;
+
else
text_size = png_ptr->current_text_left;
+
png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += text_size;
@@ -1120,7 +1226,7 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
key = png_ptr->current_text;
for (text = key; *text; text++)
- /* empty loop */ ;
+ /* Empty loop */ ;
if (text < key + png_ptr->current_text_size)
text++;
@@ -1155,7 +1261,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
png_error(png_ptr, "Out of place zTXt");
- info_ptr = info_ptr; /* to quiet some compiler warnings */
+ info_ptr = info_ptr; /* To quiet some compiler warnings */
}
#ifdef PNG_MAX_MALLOC_64K
@@ -1172,7 +1278,7 @@ png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_uint_32)(length+1));
+ (png_uint_32)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1189,8 +1295,10 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left)
text_size = png_ptr->buffer_size;
+
else
text_size = png_ptr->current_text_left;
+
png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += text_size;
@@ -1214,7 +1322,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
key = png_ptr->current_text;
for (text = key; *text; text++)
- /* empty loop */ ;
+ /* Empty loop */ ;
/* zTXt can't have zero text */
if (text >= key + png_ptr->current_text_size)
@@ -1226,7 +1334,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
text++;
- if (*text != PNG_TEXT_COMPRESSION_zTXt) /* check compression byte */
+ if (*text != PNG_TEXT_COMPRESSION_zTXt) /* Check compression byte */
{
png_ptr->current_text = NULL;
png_free(png_ptr, key);
@@ -1265,11 +1373,15 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(png_ptr->zbuf_size
- png_ptr->zstream.avail_out + key_size + 1));
+
png_memcpy(text + key_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+
png_memcpy(text, key, key_size);
+
text_size = key_size + png_ptr->zbuf_size -
png_ptr->zstream.avail_out;
+
*(text + text_size) = '\0';
}
else
@@ -1280,10 +1392,13 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
text = (png_charp)png_malloc(png_ptr, text_size +
(png_uint_32)(png_ptr->zbuf_size
- png_ptr->zstream.avail_out + 1));
+
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
+
png_memcpy(text + text_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
@@ -1347,7 +1462,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
png_error(png_ptr, "Out of place iTXt");
- info_ptr = info_ptr; /* to quiet some compiler warnings */
+ info_ptr = info_ptr; /* To quiet some compiler warnings */
}
#ifdef PNG_MAX_MALLOC_64K
@@ -1362,7 +1477,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_uint_32)(length+1));
+ (png_uint_32)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
@@ -1380,8 +1495,10 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
if (png_ptr->buffer_size < png_ptr->current_text_left)
text_size = png_ptr->buffer_size;
+
else
text_size = png_ptr->current_text_left;
+
png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += text_size;
@@ -1412,23 +1529,25 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
key = png_ptr->current_text;
for (lang = key; *lang; lang++)
- /* empty loop */ ;
+ /* Empty loop */ ;
if (lang < key + png_ptr->current_text_size - 3)
lang++;
comp_flag = *lang++;
- lang++; /* skip comp_type, always zero */
+ lang++; /* Skip comp_type, always zero */
for (lang_key = lang; *lang_key; lang_key++)
- /* empty loop */ ;
- lang_key++; /* skip NUL separator */
+ /* Empty loop */ ;
+
+ lang_key++; /* Skip NUL separator */
text=lang_key;
+
if (lang_key < key + png_ptr->current_text_size - 1)
{
for (; *text; text++)
- /* empty loop */ ;
+ /* Empty loop */ ;
}
if (text < key + png_ptr->current_text_size)
@@ -1436,6 +1555,7 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
text_ptr = (png_textp)png_malloc(png_ptr,
(png_uint_32)png_sizeof(png_text));
+
text_ptr->compression = comp_flag + 2;
text_ptr->key = key;
text_ptr->lang = lang;
@@ -1463,21 +1583,21 @@ void /* PRIVATE */
png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
length)
{
- png_uint_32 skip=0;
+ png_uint_32 skip = 0;
if (!(png_ptr->chunk_name[0] & 0x20))
{
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
- if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ PNG_HANDLE_CHUNK_ALWAYS
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
- && png_ptr->read_user_chunk_fn == NULL
+ && png_ptr->read_user_chunk_fn == NULL
#endif
- )
+ )
#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
+ png_chunk_error(png_ptr, "unknown critical chunk");
- info_ptr = info_ptr; /* to quiet some compiler warnings */
+ info_ptr = info_ptr; /* To quiet some compiler warnings */
}
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
@@ -1498,39 +1618,46 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
= '\0';
png_ptr->unknown_chunk.size = (png_size_t)length;
+
if (length == 0)
png_ptr->unknown_chunk.data = NULL;
+
else
{
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
(png_uint_32)length);
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
+ png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
}
+
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
- if(png_ptr->read_user_chunk_fn != NULL)
+ if (png_ptr->read_user_chunk_fn != NULL)
{
- /* callback to user unknown chunk handler */
+ /* Callback to user unknown chunk handler */
int ret;
ret = (*(png_ptr->read_user_chunk_fn))
(png_ptr, &png_ptr->unknown_chunk);
+
if (ret < 0)
png_chunk_error(png_ptr, "error in user chunk");
+
if (ret == 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
- if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
png_chunk_error(png_ptr, "unknown critical chunk");
png_set_unknown_chunks(png_ptr, info_ptr,
&png_ptr->unknown_chunk, 1);
}
}
+
else
#endif
png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
png_free(png_ptr, png_ptr->unknown_chunk.data);
png_ptr->unknown_chunk.data = NULL;
}
+
else
#endif
skip=length;
@@ -1567,7 +1694,9 @@ png_progressive_combine_row (png_structp png_ptr,
PNG_CONST int FARDATA png_pass_dsp_mask[7] =
{0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
#endif
- if(png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
+
if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
}
@@ -1577,7 +1706,9 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
png_progressive_end_ptr end_fn)
{
- if(png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
+
png_ptr->info_fn = info_fn;
png_ptr->row_fn = row_fn;
png_ptr->end_fn = end_fn;
@@ -1588,7 +1719,9 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
png_voidp PNGAPI
png_get_progressive_ptr(png_structp png_ptr)
{
- if(png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
+
return png_ptr->io_ptr;
}
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
diff --git a/png/pngread.c b/png/pngread.c
index ace91bad3..a4cbb3e22 100644
--- a/png/pngread.c
+++ b/png/pngread.c
@@ -1,12 +1,15 @@
/* pngread.c - read a PNG file
*
- * Last changed in libpng 1.2.35 [February 14, 2009]
- * For conditions of distribution and use, see copyright notice in png.h
+ * Last changed in libpng 1.2.37 [June 4, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file contains routines that an application calls directly to
* read a PNG file or stream.
*/
@@ -57,7 +60,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
if (png_ptr == NULL)
return (NULL);
- /* added at libpng-1.2.6 */
+ /* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
@@ -102,7 +105,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
}
else
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
-
+
if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
{
@@ -137,7 +140,7 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
}
}
- /* initialize zbuf - compression buffer */
+ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
@@ -192,7 +195,8 @@ png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size, png_size_t png_info_size)
{
/* We only come here via pre-1.0.12-compiled applications */
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
if (png_sizeof(png_struct) > png_struct_size ||
png_sizeof(png_info) > png_info_size)
@@ -246,7 +250,8 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_structp png_ptr=*ptr_ptr;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
do
{
@@ -266,7 +271,7 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_debug(1, "in png_read_init_3");
#ifdef PNG_SETJMP_SUPPORTED
- /* save jump buffer and error functions */
+ /* Save jump buffer and error functions */
png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
#endif
@@ -277,21 +282,21 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_ptr = *ptr_ptr;
}
- /* reset all variables to 0 */
+ /* Reset all variables to 0 */
png_memset(png_ptr, 0, png_sizeof(png_struct));
#ifdef PNG_SETJMP_SUPPORTED
- /* restore jump buffer */
+ /* Restore jump buffer */
png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
#endif
- /* added at libpng-1.2.6 */
+ /* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif
- /* initialize zbuf - compression buffer */
+ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
@@ -326,7 +331,8 @@ png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
void PNGAPI
png_read_info(png_structp png_ptr, png_infop info_ptr)
{
- if (png_ptr == NULL || info_ptr == NULL) return;
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
png_debug(1, "in png_read_info");
/* If we haven't checked all of the PNG signature bytes, do so now. */
if (png_ptr->sig_bytes < 8)
@@ -529,12 +535,13 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
}
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
-/* optional call to update the users info_ptr structure */
+/* Optional call to update the users info_ptr structure */
void PNGAPI
png_read_update_info(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_read_update_info");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
else
@@ -553,7 +560,8 @@ void PNGAPI
png_start_read_image(png_structp png_ptr)
{
png_debug(1, "in png_start_read_image");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
}
@@ -570,14 +578,15 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
#endif
int ret;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_debug2(1, "in png_read_row (row %lu, pass %d)",
png_ptr->row_number, png_ptr->pass);
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
- /* check for transforms that have been set but were defined out */
+ /* Check for transforms that have been set but were defined out */
#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED)
if (png_ptr->transformations & PNG_INVERT_MONO)
png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined.");
@@ -609,7 +618,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
}
#if defined(PNG_READ_INTERLACING_SUPPORTED)
- /* if interlaced and we do not need a new row, combine row and return */
+ /* If interlaced and we do not need a new row, combine row and return */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
switch (png_ptr->pass)
@@ -756,15 +765,15 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
png_do_read_transformations(png_ptr);
#if defined(PNG_READ_INTERLACING_SUPPORTED)
- /* blow up interlaced rows to full size */
+ /* Blow up interlaced rows to full size */
if (png_ptr->interlaced &&
(png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
-/* old interface (pre-1.0.9):
- png_do_read_interlace(&(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
- */
+ /* Old interface (pre-1.0.9):
+ * png_do_read_interlace(&(png_ptr->row_info),
+ * png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
+ */
png_do_read_interlace(png_ptr);
if (dsp_row != NULL)
@@ -823,7 +832,8 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
png_bytepp dp;
png_debug(1, "in png_read_rows");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
rp = row;
dp = display_row;
if (rp != NULL && dp != NULL)
@@ -872,7 +882,8 @@ png_read_image(png_structp png_ptr, png_bytepp image)
png_bytepp rp;
png_debug(1, "in png_read_image");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#ifdef PNG_READ_INTERLACING_SUPPORTED
pass = png_set_interlace_handling(png_ptr);
@@ -908,7 +919,8 @@ void PNGAPI
png_read_end(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_read_end");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
do
@@ -1075,7 +1087,7 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
}
#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
-/* free all memory used by the read */
+/* Free all memory used by the read */
void PNGAPI
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
png_infopp end_info_ptr_ptr)
@@ -1147,7 +1159,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
}
}
-/* free all memory used by the read (old method) */
+/* Free all memory used by the read (old method) */
void /* PRIVATE */
png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr)
{
@@ -1296,7 +1308,8 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
void PNGAPI
png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
{
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->read_row_fn = read_row_fn;
}
@@ -1310,9 +1323,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
{
int row;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
- /* invert the alpha channel from opacity to transparency
+ /* Invert the alpha channel from opacity to transparency
*/
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
png_set_invert_alpha(png_ptr);
@@ -1328,10 +1342,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
/* -------------- image transformations start here ------------------- */
#if defined(PNG_READ_16_TO_8_SUPPORTED)
- /* tell libpng to strip 16 bit/color files down to 8 bits per color
+ /* Tell libpng to strip 16 bit/color files down to 8 bits per color.
*/
if (transforms & PNG_TRANSFORM_STRIP_16)
- png_set_strip_16(png_ptr);
+ png_set_strip_16(png_ptr);
#endif
#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
@@ -1339,7 +1353,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
* the background (not recommended).
*/
if (transforms & PNG_TRANSFORM_STRIP_ALPHA)
- png_set_strip_alpha(png_ptr);
+ png_set_strip_alpha(png_ptr);
#endif
#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED)
@@ -1347,7 +1361,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
* byte into separate bytes (useful for paletted and grayscale images).
*/
if (transforms & PNG_TRANSFORM_PACKING)
- png_set_packing(png_ptr);
+ png_set_packing(png_ptr);
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
@@ -1355,7 +1369,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
* (not useful if you are using png_set_packing).
*/
if (transforms & PNG_TRANSFORM_PACKSWAP)
- png_set_packswap(png_ptr);
+ png_set_packswap(png_ptr);
#endif
#if defined(PNG_READ_EXPAND_SUPPORTED)
@@ -1365,9 +1379,9 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
* channels so the data will be available as RGBA quartets.
*/
if (transforms & PNG_TRANSFORM_EXPAND)
- if ((png_ptr->bit_depth < 8) ||
- (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
- (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
+ if ((png_ptr->bit_depth < 8) ||
+ (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
+ (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
png_set_expand(png_ptr);
#endif
@@ -1375,10 +1389,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
*/
#if defined(PNG_READ_INVERT_SUPPORTED)
- /* invert monochrome files to have 0 as white and 1 as black
+ /* Invert monochrome files to have 0 as white and 1 as black
*/
if (transforms & PNG_TRANSFORM_INVERT_MONO)
- png_set_invert_mono(png_ptr);
+ png_set_invert_mono(png_ptr);
#endif
#if defined(PNG_READ_SHIFT_SUPPORTED)
@@ -1397,24 +1411,24 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
#endif
#if defined(PNG_READ_BGR_SUPPORTED)
- /* flip the RGB pixels to BGR (or RGBA to BGRA)
+ /* Flip the RGB pixels to BGR (or RGBA to BGRA)
*/
if (transforms & PNG_TRANSFORM_BGR)
- png_set_bgr(png_ptr);
+ png_set_bgr(png_ptr);
#endif
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED)
- /* swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR)
+ /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR)
*/
if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
png_set_swap_alpha(png_ptr);
#endif
#if defined(PNG_READ_SWAP_SUPPORTED)
- /* swap bytes of 16 bit files to least significant byte first
+ /* Swap bytes of 16 bit files to least significant byte first
*/
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
- png_set_swap(png_ptr);
+ png_set_swap(png_ptr);
#endif
/* We don't handle adding filler bytes */
@@ -1434,11 +1448,11 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
{
info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
info_ptr->height * png_sizeof(png_bytep));
+ png_memset(info_ptr->row_pointers, 0, info_ptr->height
+ * png_sizeof(png_bytep));
#ifdef PNG_FREE_ME_SUPPORTED
info_ptr->free_me |= PNG_FREE_ROWS;
#endif
- png_memset(info_ptr->row_pointers, 0, info_ptr->height
- * png_sizeof(png_bytep));
for (row = 0; row < (int)info_ptr->height; row++)
info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
png_get_rowbytes(png_ptr, info_ptr));
@@ -1447,10 +1461,10 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
png_read_image(png_ptr, info_ptr->row_pointers);
info_ptr->valid |= PNG_INFO_IDAT;
- /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
+ /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */
png_read_end(png_ptr, info_ptr);
- transforms = transforms; /* quiet compiler warnings */
+ transforms = transforms; /* Quiet compiler warnings */
params = params;
}
diff --git a/png/pngrio.c b/png/pngrio.c
index f5027e743..2267bca9a 100644
--- a/png/pngrio.c
+++ b/png/pngrio.c
@@ -1,12 +1,15 @@
/* pngrio.c - functions for data input
*
- * Last changed in libpng 1.2.30 [August 15, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file provides a location for all input. Users who need
* special handling are expected to write a function that has the same
* arguments as this and performs a similar function, but that possibly
@@ -20,10 +23,11 @@
#if defined(PNG_READ_SUPPORTED)
/* Read the data from whatever input you are using. The default routine
- reads from a file pointer. Note that this routine sometimes gets called
- with very small lengths, so you should implement some kind of simple
- buffering if you are using unbuffered reads. This should never be asked
- to read more then 64K on a 16 bit machine. */
+ * reads from a file pointer. Note that this routine sometimes gets called
+ * with very small lengths, so you should implement some kind of simple
+ * buffering if you are using unbuffered reads. This should never be asked
+ * to read more then 64K on a 16 bit machine.
+ */
void /* PRIVATE */
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
@@ -36,16 +40,18 @@ png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual reading of data. If you are
- not reading from a standard C stream, you should create a replacement
- read_data function and use it at run time with png_set_read_fn(), rather
- than changing the library. */
+ * not reading from a standard C stream, you should create a replacement
+ * read_data function and use it at run time with png_set_read_fn(), rather
+ * than changing the library.
+ */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
* instead of an int, which is what fread() actually returns.
*/
@@ -61,7 +67,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
png_error(png_ptr, "Read Error");
}
#else
-/* this is the model-independent version. Since the standard I/O library
+/* This is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
@@ -76,7 +82,8 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
png_byte *n_data;
png_FILE_p io_ptr;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
/* Check if data really is near. If so, use usual code. */
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
@@ -121,23 +128,27 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
#endif
/* This function allows the application to supply a new input function
- for libpng if standard C streams aren't being used.
-
- This function takes as its arguments:
- png_ptr - pointer to a png input data structure
- io_ptr - pointer to user supplied structure containing info about
- the input functions. May be NULL.
- read_data_fn - pointer to a new input function that takes as its
- arguments a pointer to a png_struct, a pointer to
- a location where input data can be stored, and a 32-bit
- unsigned int that is the number of bytes to be read.
- To exit and output any fatal error messages the new write
- function should call png_error(png_ptr, "Error msg"). */
+ * for libpng if standard C streams aren't being used.
+ *
+ * This function takes as its arguments:
+ * png_ptr - pointer to a png input data structure
+ * io_ptr - pointer to user supplied structure containing info about
+ * the input functions. May be NULL.
+ * read_data_fn - pointer to a new input function that takes as its
+ * arguments a pointer to a png_struct, a pointer to
+ * a location where input data can be stored, and a 32-bit
+ * unsigned int that is the number of bytes to be read.
+ * To exit and output any fatal error messages the new write
+ * function should call png_error(png_ptr, "Error msg").
+ * May be NULL, in which case libpng's default function will
+ * be used.
+ */
void PNGAPI
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr read_data_fn)
{
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
diff --git a/png/pngrtran.c b/png/pngrtran.c
index a916f54fe..d7e6b4a95 100644
--- a/png/pngrtran.c
+++ b/png/pngrtran.c
@@ -1,12 +1,15 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
- * Last changed in libpng 1.2.35 [February 14, 2009]
- * For conditions of distribution and use, see copyright notice in png.h
+ * Last changed in libpng 1.2.38 [July 16, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file contains functions optionally called by an application
* in order to tell libpng how to handle data when reading a PNG.
* Transformations that are used in both reading and writing are
@@ -23,24 +26,29 @@ png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
{
png_debug(1, "in png_set_crc_action");
/* Tell libpng how we react to CRC errors in critical chunks */
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
switch (crit_action)
{
- case PNG_CRC_NO_CHANGE: /* leave setting as is */
+ case PNG_CRC_NO_CHANGE: /* Leave setting as is */
break;
- case PNG_CRC_WARN_USE: /* warn/use data */
+
+ case PNG_CRC_WARN_USE: /* Warn/use data */
png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE;
break;
- case PNG_CRC_QUIET_USE: /* quiet/use data */
+
+ case PNG_CRC_QUIET_USE: /* Quiet/use data */
png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE |
PNG_FLAG_CRC_CRITICAL_IGNORE;
break;
- case PNG_CRC_WARN_DISCARD: /* not a valid action for critical data */
+
+ case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */
png_warning(png_ptr,
"Can't discard critical data on CRC error.");
- case PNG_CRC_ERROR_QUIT: /* error/quit */
+ case PNG_CRC_ERROR_QUIT: /* Error/quit */
+
case PNG_CRC_DEFAULT:
default:
png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK;
@@ -49,22 +57,27 @@ png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
switch (ancil_action)
{
- case PNG_CRC_NO_CHANGE: /* leave setting as is */
+ case PNG_CRC_NO_CHANGE: /* Leave setting as is */
break;
- case PNG_CRC_WARN_USE: /* warn/use data */
+
+ case PNG_CRC_WARN_USE: /* Warn/use data */
png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE;
break;
- case PNG_CRC_QUIET_USE: /* quiet/use data */
+
+ case PNG_CRC_QUIET_USE: /* Quiet/use data */
png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE |
PNG_FLAG_CRC_ANCILLARY_NOWARN;
break;
- case PNG_CRC_ERROR_QUIT: /* error/quit */
+
+ case PNG_CRC_ERROR_QUIT: /* Error/quit */
png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_NOWARN;
break;
- case PNG_CRC_WARN_DISCARD: /* warn/discard data */
+
+ case PNG_CRC_WARN_DISCARD: /* Warn/discard data */
+
case PNG_CRC_DEFAULT:
default:
png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK;
@@ -74,14 +87,15 @@ png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \
defined(PNG_FLOATING_POINT_SUPPORTED)
-/* handle alpha and tRNS via a background color */
+/* Handle alpha and tRNS via a background color */
void PNGAPI
png_set_background(png_structp png_ptr,
png_color_16p background_color, int background_gamma_code,
int need_expand, double background_gamma)
{
png_debug(1, "in png_set_background");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
{
png_warning(png_ptr, "Application must supply a known background gamma");
@@ -98,12 +112,13 @@ png_set_background(png_structp png_ptr,
#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
-/* strip 16 bit depth files to 8 bit depth */
+/* Strip 16 bit depth files to 8 bit depth */
void PNGAPI
png_set_strip_16(png_structp png_ptr)
{
png_debug(1, "in png_set_strip_16");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_16_TO_8;
}
#endif
@@ -113,7 +128,8 @@ void PNGAPI
png_set_strip_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_strip_alpha");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
}
#endif
@@ -143,7 +159,8 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
int full_dither)
{
png_debug(1, "in png_set_dither");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_DITHER;
if (!full_dither)
@@ -161,27 +178,29 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
if (histogram != NULL)
{
/* This is easy enough, just throw out the least used colors.
- Perhaps not the best solution, but good enough. */
+ * Perhaps not the best solution, but good enough.
+ */
int i;
- /* initialize an array to sort colors */
+ /* Initialize an array to sort colors */
png_ptr->dither_sort = (png_bytep)png_malloc(png_ptr,
(png_uint_32)(num_palette * png_sizeof(png_byte)));
- /* initialize the dither_sort array */
+ /* Initialize the dither_sort array */
for (i = 0; i < num_palette; i++)
png_ptr->dither_sort[i] = (png_byte)i;
/* Find the least used palette entries by starting a
- bubble sort, and running it until we have sorted
- out enough colors. Note that we don't care about
- sorting all the colors, just finding which are
- least used. */
+ * bubble sort, and running it until we have sorted
+ * out enough colors. Note that we don't care about
+ * sorting all the colors, just finding which are
+ * least used.
+ */
for (i = num_palette - 1; i >= maximum_colors; i--)
{
- int done; /* to stop early if the list is pre-sorted */
+ int done; /* To stop early if the list is pre-sorted */
int j;
done = 1;
@@ -202,13 +221,14 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
break;
}
- /* swap the palette around, and set up a table, if necessary */
+ /* Swap the palette around, and set up a table, if necessary */
if (full_dither)
{
int j = num_palette;
- /* put all the useful colors within the max, but don't
- move the others */
+ /* Put all the useful colors within the max, but don't
+ * move the others.
+ */
for (i = 0; i < maximum_colors; i++)
{
if ((int)png_ptr->dither_sort[i] >= maximum_colors)
@@ -224,11 +244,12 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
{
int j = num_palette;
- /* move all the used colors inside the max limit, and
- develop a translation table */
+ /* Move all the used colors inside the max limit, and
+ * develop a translation table.
+ */
for (i = 0; i < maximum_colors; i++)
{
- /* only move the colors we need to */
+ /* Only move the colors we need to */
if ((int)png_ptr->dither_sort[i] >= maximum_colors)
{
png_color tmp_color;
@@ -240,20 +261,20 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
tmp_color = palette[j];
palette[j] = palette[i];
palette[i] = tmp_color;
- /* indicate where the color went */
+ /* Indicate where the color went */
png_ptr->dither_index[j] = (png_byte)i;
png_ptr->dither_index[i] = (png_byte)j;
}
}
- /* find closest color for those colors we are not using */
+ /* Find closest color for those colors we are not using */
for (i = 0; i < num_palette; i++)
{
if ((int)png_ptr->dither_index[i] >= maximum_colors)
{
int min_d, k, min_k, d_index;
- /* find the closest color to one we threw out */
+ /* Find the closest color to one we threw out */
d_index = png_ptr->dither_index[i];
min_d = PNG_COLOR_DIST(palette[d_index], palette[0]);
for (k = 1, min_k = 0; k < maximum_colors; k++)
@@ -268,7 +289,7 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
min_k = k;
}
}
- /* point to closest color */
+ /* Point to closest color */
png_ptr->dither_index[i] = (png_byte)min_k;
}
}
@@ -279,13 +300,13 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
else
{
/* This is much harder to do simply (and quickly). Perhaps
- we need to go through a median cut routine, but those
- don't always behave themselves with only a few colors
- as input. So we will just find the closest two colors,
- and throw out one of them (chosen somewhat randomly).
- [We don't understand this at all, so if someone wants to
- work on improving it, be our guest - AED, GRP]
- */
+ * we need to go through a median cut routine, but those
+ * don't always behave themselves with only a few colors
+ * as input. So we will just find the closest two colors,
+ * and throw out one of them (chosen somewhat randomly).
+ * [We don't understand this at all, so if someone wants to
+ * work on improving it, be our guest - AED, GRP]
+ */
int i;
int max_d;
int num_new_palette;
@@ -294,13 +315,13 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
t = NULL;
- /* initialize palette index arrays */
+ /* Initialize palette index arrays */
png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
(png_uint_32)(num_palette * png_sizeof(png_byte)));
png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
(png_uint_32)(num_palette * png_sizeof(png_byte)));
- /* initialize the sort array */
+ /* Initialize the sort array */
for (i = 0; i < num_palette; i++)
{
png_ptr->index_to_palette[i] = (png_byte)i;
@@ -313,14 +334,14 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
num_new_palette = num_palette;
- /* initial wild guess at how far apart the farthest pixel
- pair we will be eliminating will be. Larger
- numbers mean more areas will be allocated, Smaller
- numbers run the risk of not saving enough data, and
- having to do this all over again.
-
- I have not done extensive checking on this number.
- */
+ /* Initial wild guess at how far apart the farthest pixel
+ * pair we will be eliminating will be. Larger
+ * numbers mean more areas will be allocated, Smaller
+ * numbers run the risk of not saving enough data, and
+ * having to do this all over again.
+ *
+ * I have not done extensive checking on this number.
+ */
max_d = 96;
while (num_new_palette > maximum_colors)
@@ -455,10 +476,8 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
int num_green = (1 << PNG_DITHER_GREEN_BITS);
int num_blue = (1 << PNG_DITHER_BLUE_BITS);
png_size_t num_entries = ((png_size_t)1 << total_bits);
-
png_ptr->palette_lookup = (png_bytep )png_malloc(png_ptr,
(png_uint_32)(num_entries * png_sizeof(png_byte)));
-
png_memset(png_ptr->palette_lookup, 0, num_entries *
png_sizeof(png_byte));
@@ -525,7 +544,8 @@ void PNGAPI
png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
{
png_debug(1, "in png_set_gamma");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) ||
(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
@@ -544,7 +564,8 @@ void PNGAPI
png_set_expand(png_structp png_ptr)
{
png_debug(1, "in png_set_expand");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
}
@@ -571,7 +592,8 @@ void PNGAPI
png_set_palette_to_rgb(png_structp png_ptr)
{
png_debug(1, "in png_set_palette_to_rgb");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
}
@@ -582,7 +604,8 @@ void PNGAPI
png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
{
png_debug(1, "in png_set_expand_gray_1_2_4_to_8");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_EXPAND;
png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
}
@@ -595,7 +618,8 @@ void PNGAPI
png_set_gray_1_2_4_to_8(png_structp png_ptr)
{
png_debug(1, "in png_set_gray_1_2_4_to_8");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
}
#endif
@@ -631,10 +655,11 @@ void PNGAPI
png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red,
double green)
{
- int red_fixed = (int)((float)red*100000.0 + 0.5);
- int green_fixed = (int)((float)green*100000.0 + 0.5);
- if (png_ptr == NULL) return;
- png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed);
+ int red_fixed = (int)((float)red*100000.0 + 0.5);
+ int green_fixed = (int)((float)green*100000.0 + 0.5);
+ if (png_ptr == NULL)
+ return;
+ png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed);
}
#endif
@@ -643,13 +668,16 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
png_fixed_point red, png_fixed_point green)
{
png_debug(1, "in png_set_rgb_to_gray");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
switch(error_action)
{
case 1: png_ptr->transformations |= PNG_RGB_TO_GRAY;
break;
+
case 2: png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
break;
+
case 3: png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
}
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
@@ -671,8 +699,8 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
}
else if (red + green < 100000L)
{
- red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
- green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
+ red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
+ green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
}
else
{
@@ -689,14 +717,15 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_LEGACY_SUPPORTED)
+ defined(PNG_LEGACY_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
void PNGAPI
png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
read_user_transform_fn)
{
png_debug(1, "in png_set_read_user_transform_fn");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->read_user_transform_fn = read_user_transform_fn;
@@ -729,8 +758,9 @@ png_init_read_transformations(png_structp png_ptr)
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* Detect gray background and attempt to enable optimization
- * for gray --> RGB case */
- /* Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or
+ * for gray --> RGB case
+ *
+ * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or
* RGB_ALPHA (in which case need_expand is superfluous anyway), the
* background color might actually be gray yet not be flagged as such.
* This is not a problem for the current code, which uses
@@ -757,7 +787,7 @@ png_init_read_transformations(png_structp png_ptr)
{
if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */
{
- /* expand background and tRNS chunks */
+ /* Expand background and tRNS chunks */
switch (png_ptr->bit_depth)
{
case 1:
@@ -771,6 +801,7 @@ png_init_read_transformations(png_structp png_ptr)
= png_ptr->trans_values.blue = png_ptr->trans_values.gray;
}
break;
+
case 2:
png_ptr->background.gray *= (png_uint_16)0x55;
png_ptr->background.red = png_ptr->background.green
@@ -782,6 +813,7 @@ png_init_read_transformations(png_structp png_ptr)
= png_ptr->trans_values.blue = png_ptr->trans_values.gray;
}
break;
+
case 4:
png_ptr->background.gray *= (png_uint_16)0x11;
png_ptr->background.red = png_ptr->background.green
@@ -793,7 +825,9 @@ png_init_read_transformations(png_structp png_ptr)
= png_ptr->trans_values.blue = png_ptr->trans_values.gray;
}
break;
+
case 8:
+
case 16:
png_ptr->background.red = png_ptr->background.green
= png_ptr->background.blue = png_ptr->background.gray;
@@ -816,8 +850,9 @@ png_init_read_transformations(png_structp png_ptr)
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
#endif
{
- /* invert the alpha channel (in tRNS) unless the pixels are
- going to be expanded, in which case leave it for later */
+ /* Invert the alpha channel (in tRNS) unless the pixels are
+ * going to be expanded, in which case leave it for later
+ */
int i, istop;
istop=(int)png_ptr->num_trans;
for (i=0; i<istop; i++)
@@ -844,7 +879,7 @@ png_init_read_transformations(png_structp png_ptr)
for (i=0; i<png_ptr->num_trans; i++)
{
if (png_ptr->trans[i] != 0 && png_ptr->trans[i] != 0xff)
- k=1; /* partial transparency is present */
+ k=1; /* Partial transparency is present */
}
if (k == 0)
png_ptr->transformations &= ~PNG_GAMMA;
@@ -859,8 +894,7 @@ png_init_read_transformations(png_structp png_ptr)
{
if (color_type == PNG_COLOR_TYPE_PALETTE)
{
- /* could skip if no transparency and
- */
+ /* Could skip if no transparency */
png_color back, back_1;
png_colorp palette = png_ptr->palette;
int num_palette = png_ptr->num_palette;
@@ -885,10 +919,12 @@ png_init_read_transformations(png_structp png_ptr)
g = (png_ptr->screen_gamma);
gs = 1.0;
break;
+
case PNG_BACKGROUND_GAMMA_FILE:
g = 1.0 / (png_ptr->gamma);
gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
break;
+
case PNG_BACKGROUND_GAMMA_UNIQUE:
g = 1.0 / (png_ptr->background_gamma);
gs = 1.0 / (png_ptr->background_gamma *
@@ -977,10 +1013,12 @@ png_init_read_transformations(png_structp png_ptr)
g = (png_ptr->screen_gamma);
gs = 1.0;
break;
+
case PNG_BACKGROUND_GAMMA_FILE:
g = 1.0 / (png_ptr->gamma);
gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
break;
+
case PNG_BACKGROUND_GAMMA_UNIQUE:
g = 1.0 / (png_ptr->background_gamma);
gs = 1.0 / (png_ptr->background_gamma *
@@ -1022,7 +1060,7 @@ png_init_read_transformations(png_structp png_ptr)
}
}
else
- /* transformation does not include PNG_BACKGROUND */
+ /* Transformation does not include PNG_BACKGROUND */
#endif /* PNG_READ_BACKGROUND_SUPPORTED */
if (color_type == PNG_COLOR_TYPE_PALETTE)
{
@@ -1142,10 +1180,6 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr->transformations & PNG_EXPAND_tRNS)
info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
-#if 0 /* Removed from libpng-1.2.27 */
- else
- info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
-#endif
}
if (info_ptr->bit_depth < 8)
info_ptr->bit_depth = 8;
@@ -1194,8 +1228,8 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
if (png_ptr->transformations & PNG_DITHER)
{
if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
- (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) &&
- png_ptr->palette_lookup && info_ptr->bit_depth == 8)
+ (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) &&
+ png_ptr->palette_lookup && info_ptr->bit_depth == 8)
{
info_ptr->color_type = PNG_COLOR_TYPE_PALETTE;
}
@@ -1229,7 +1263,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
(info_ptr->color_type == PNG_COLOR_TYPE_GRAY)))
{
info_ptr->channels++;
- /* if adding a true alpha channel not just filler */
+ /* If adding a true alpha channel not just filler */
#if !defined(PNG_1_0_X)
if (png_ptr->transformations & PNG_ADD_ALPHA)
info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
@@ -1284,7 +1318,8 @@ png_do_read_transformations(png_structp png_ptr)
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
/* Application has failed to call either png_read_start_image()
* or png_read_update_info() after setting transforms that expand
- * pixels. This check added to libpng-1.2.19 */
+ * pixels. This check added to libpng-1.2.19
+ */
#if (PNG_WARN_UNINITIALIZED_ROW==1)
png_error(png_ptr, "Uninitialized row");
#else
@@ -1337,39 +1372,41 @@ png_do_read_transformations(png_structp png_ptr)
}
#endif
-/*
-From Andreas Dilger e-mail to png-implement, 26 March 1998:
-
- In most cases, the "simple transparency" should be done prior to doing
- gray-to-RGB, or you will have to test 3x as many bytes to check if a
- pixel is transparent. You would also need to make sure that the
- transparency information is upgraded to RGB.
-
- To summarize, the current flow is:
- - Gray + simple transparency -> compare 1 or 2 gray bytes and composite
- with background "in place" if transparent,
- convert to RGB if necessary
- - Gray + alpha -> composite with gray background and remove alpha bytes,
- convert to RGB if necessary
-
- To support RGB backgrounds for gray images we need:
- - Gray + simple transparency -> convert to RGB + simple transparency, compare
- 3 or 6 bytes and composite with background
- "in place" if transparent (3x compare/pixel
- compared to doing composite with gray bkgrnd)
- - Gray + alpha -> convert to RGB + alpha, composite with background and
- remove alpha bytes (3x float operations/pixel
- compared with composite on gray background)
-
- Greg's change will do this. The reason it wasn't done before is for
- performance, as this increases the per-pixel operations. If we would check
- in advance if the background was gray or RGB, and position the gray-to-RGB
- transform appropriately, then it would save a lot of work/time.
+/* From Andreas Dilger e-mail to png-implement, 26 March 1998:
+ *
+ * In most cases, the "simple transparency" should be done prior to doing
+ * gray-to-RGB, or you will have to test 3x as many bytes to check if a
+ * pixel is transparent. You would also need to make sure that the
+ * transparency information is upgraded to RGB.
+ *
+ * To summarize, the current flow is:
+ * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite
+ * with background "in place" if transparent,
+ * convert to RGB if necessary
+ * - Gray + alpha -> composite with gray background and remove alpha bytes,
+ * convert to RGB if necessary
+ *
+ * To support RGB backgrounds for gray images we need:
+ * - Gray + simple transparency -> convert to RGB + simple transparency,
+ * compare 3 or 6 bytes and composite with
+ * background "in place" if transparent
+ * (3x compare/pixel compared to doing
+ * composite with gray bkgrnd)
+ * - Gray + alpha -> convert to RGB + alpha, composite with background and
+ * remove alpha bytes (3x float
+ * operations/pixel compared with composite
+ * on gray background)
+ *
+ * Greg's change will do this. The reason it wasn't done before is for
+ * performance, as this increases the per-pixel operations. If we would check
+ * in advance if the background was gray or RGB, and position the gray-to-RGB
+ * transform appropriately, then it would save a lot of work/time.
*/
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
- /* if gray -> RGB, do so now only if background is non-gray; else do later
- * for performance reasons */
+ /* If gray -> RGB, do so now only if background is non-gray; else do later
+ * for performance reasons
+ */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
!(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
@@ -1394,14 +1431,14 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
#if defined(PNG_READ_GAMMA_SUPPORTED)
if ((png_ptr->transformations & PNG_GAMMA) &&
#if defined(PNG_READ_BACKGROUND_SUPPORTED)
- !((png_ptr->transformations & PNG_BACKGROUND) &&
- ((png_ptr->num_trans != 0) ||
- (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
+ !((png_ptr->transformations & PNG_BACKGROUND) &&
+ ((png_ptr->num_trans != 0) ||
+ (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) &&
#endif
- (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE))
+ (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE))
png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->gamma_table, png_ptr->gamma_16_table,
- png_ptr->gamma_shift);
+ png_ptr->gamma_table, png_ptr->gamma_16_table,
+ png_ptr->gamma_shift);
#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
@@ -1446,7 +1483,7 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
- /* if gray -> RGB, do so now only if we did not do so above */
+ /* If gray -> RGB, do so now only if we did not do so above */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
@@ -1477,16 +1514,16 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
if (png_ptr->transformations & PNG_USER_TRANSFORM)
{
if (png_ptr->read_user_transform_fn != NULL)
- (*(png_ptr->read_user_transform_fn)) /* user read transform function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
- /* png_uint_32 width; width of row */
- /* png_uint_32 rowbytes; number of bytes in row */
- /* png_byte color_type; color type of pixels */
- /* png_byte bit_depth; bit depth of samples */
- /* png_byte channels; number of channels (1-4) */
- /* png_byte pixel_depth; bits per pixel (depth*channels) */
- png_ptr->row_buf + 1); /* start of pixel data for row */
+ (*(png_ptr->read_user_transform_fn)) /* User read transform function */
+ (png_ptr, /* png_ptr */
+ &(png_ptr->row_info), /* row_info: */
+ /* png_uint_32 width; width of row */
+ /* png_uint_32 rowbytes; number of bytes in row */
+ /* png_byte color_type; color type of pixels */
+ /* png_byte bit_depth; bit depth of samples */
+ /* png_byte channels; number of channels (1-4) */
+ /* png_byte pixel_depth; bits per pixel (depth*channels) */
+ png_ptr->row_buf + 1); /* start of pixel data for row */
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (png_ptr->user_transform_depth)
png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
@@ -1544,6 +1581,7 @@ png_do_unpack(png_row_infop row_info, png_bytep row)
}
break;
}
+
case 2:
{
@@ -1565,6 +1603,7 @@ png_do_unpack(png_row_infop row_info, png_bytep row)
}
break;
}
+
case 4:
{
png_bytep sp = row + (png_size_t)((row_width - 1) >> 1);
@@ -1656,6 +1695,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
}
break;
}
+
case 4:
{
png_bytep bp = row;
@@ -1671,6 +1711,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
}
break;
}
+
case 8:
{
png_bytep bp = row;
@@ -1683,6 +1724,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
}
break;
}
+
case 16:
{
png_bytep bp = row;
@@ -1704,7 +1746,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
-/* chop rows of bit depth 16 down to 8 */
+/* Chop rows of bit depth 16 down to 8 */
void /* PRIVATE */
png_do_chop(png_row_infop row_info, png_bytep row)
{
@@ -1728,14 +1770,17 @@ png_do_chop(png_row_infop row_info, png_bytep row)
*
* What the ideal calculation should be:
* *dp = (((((png_uint_32)(*sp) << 8) |
- * (png_uint_32)(*(sp + 1))) * 255 + 127) / (png_uint_32)65535L;
+ * (png_uint_32)(*(sp + 1))) * 255 + 127)
+ * / (png_uint_32)65535L;
*
* GRR: no, I think this is what it really should be:
* *dp = (((((png_uint_32)(*sp) << 8) |
- * (png_uint_32)(*(sp + 1))) + 128L) / (png_uint_32)257L;
+ * (png_uint_32)(*(sp + 1))) + 128L)
+ * / (png_uint_32)257L;
*
* GRR: here's the exact calculation with shifts:
- * temp = (((png_uint_32)(*sp) << 8) | (png_uint_32)(*(sp + 1))) + 128L;
+ * temp = (((png_uint_32)(*sp) << 8) |
+ * (png_uint_32)(*(sp + 1))) + 128L;
* *dp = (temp - (temp >> 8)) >> 8;
*
* Approximate calculation with shift/add instead of multiply/divide:
@@ -2125,7 +2170,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
-/* expand grayscale files to RGB, with or without alpha */
+/* Expand grayscale files to RGB, with or without alpha */
void /* PRIVATE */
png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
{
@@ -2208,7 +2253,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row)
#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
-/* reduce RGB files to grayscale, with or without alpha
+/* Reduce RGB files to grayscale, with or without alpha
* using the equation given in Poynton's ColorFAQ at
* <http://www.inforamp.net/~poynton/> (THIS LINK IS DEAD June 2008)
* New link:
@@ -2486,18 +2531,22 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
num_palette = 2;
color_inc = 0xff;
break;
+
case 2:
num_palette = 4;
color_inc = 0x55;
break;
+
case 4:
num_palette = 16;
color_inc = 0x11;
break;
+
case 8:
num_palette = 256;
color_inc = 1;
break;
+
default:
num_palette = 0;
color_inc = 0;
@@ -2675,7 +2724,7 @@ png_correct_palette(png_structp png_ptr, png_colorp palette,
}
}
}
- else /* assume grayscale palette (what else could it be?) */
+ else /* Assume grayscale palette (what else could it be?) */
{
int i;
@@ -2751,6 +2800,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 2:
{
#if defined(PNG_READ_GAMMA_SUPPORTED)
@@ -2807,6 +2857,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 4:
{
#if defined(PNG_READ_GAMMA_SUPPORTED)
@@ -2863,6 +2914,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 8:
{
#if defined(PNG_READ_GAMMA_SUPPORTED)
@@ -2895,6 +2947,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 16:
{
#if defined(PNG_READ_GAMMA_SUPPORTED)
@@ -2908,7 +2961,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
if (v == trans_values->gray)
{
- /* background is already in screen gamma */
+ /* Background is already in screen gamma */
*sp = (png_byte)((background->gray >> 8) & 0xff);
*(sp + 1) = (png_byte)(background->gray & 0xff);
}
@@ -2941,6 +2994,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case PNG_COLOR_TYPE_RGB:
{
if (row_info->bit_depth == 8)
@@ -2998,7 +3052,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
if (r == trans_values->red && g == trans_values->green &&
b == trans_values->blue)
{
- /* background is already in screen gamma */
+ /* Background is already in screen gamma */
*sp = (png_byte)((background->red >> 8) & 0xff);
*(sp + 1) = (png_byte)(background->red & 0xff);
*(sp + 2) = (png_byte)((background->green >> 8) & 0xff);
@@ -3045,6 +3099,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case PNG_COLOR_TYPE_GRAY_ALPHA:
{
if (row_info->bit_depth == 8)
@@ -3065,7 +3120,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
else if (a == 0)
{
- /* background is already in screen gamma */
+ /* Background is already in screen gamma */
*dp = (png_byte)background->gray;
}
else
@@ -3132,7 +3187,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
else
#endif
{
- /* background is already in screen gamma */
+ /* Background is already in screen gamma */
*dp = (png_byte)((background->gray >> 8) & 0xff);
*(dp + 1) = (png_byte)(background->gray & 0xff);
}
@@ -3187,6 +3242,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
break;
}
+
case PNG_COLOR_TYPE_RGB_ALPHA:
{
if (row_info->bit_depth == 8)
@@ -3209,7 +3265,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
else if (a == 0)
{
- /* background is already in screen gamma */
+ /* Background is already in screen gamma */
*dp = (png_byte)background->red;
*(dp + 1) = (png_byte)background->green;
*(dp + 2) = (png_byte)background->blue;
@@ -3290,7 +3346,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
else if (a == 0)
{
- /* background is already in screen gamma */
+ /* Background is already in screen gamma */
*dp = (png_byte)((background->red >> 8) & 0xff);
*(dp + 1) = (png_byte)(background->red & 0xff);
*(dp + 2) = (png_byte)((background->green >> 8) & 0xff);
@@ -3445,6 +3501,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
}
break;
}
+
case PNG_COLOR_TYPE_RGB_ALPHA:
{
if (row_info->bit_depth == 8)
@@ -3482,6 +3539,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
}
break;
}
+
case PNG_COLOR_TYPE_GRAY_ALPHA:
{
if (row_info->bit_depth == 8)
@@ -3506,6 +3564,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
}
break;
}
+
case PNG_COLOR_TYPE_GRAY:
{
if (row_info->bit_depth == 2)
@@ -3526,6 +3585,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
sp++;
}
}
+
if (row_info->bit_depth == 4)
{
sp = row;
@@ -3539,6 +3599,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
sp++;
}
}
+
else if (row_info->bit_depth == 8)
{
sp = row;
@@ -3548,6 +3609,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
sp++;
}
}
+
else if (row_info->bit_depth == 16)
{
sp = row;
@@ -3613,6 +3675,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 2:
{
sp = row + (png_size_t)((row_width - 1) >> 2);
@@ -3634,6 +3697,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 4:
{
sp = row + (png_size_t)((row_width - 1) >> 1);
@@ -3698,6 +3762,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
*dp-- = palette[*sp].red;
sp--;
}
+
row_info->bit_depth = 8;
row_info->pixel_depth = 24;
row_info->rowbytes = row_width * 3;
@@ -3759,6 +3824,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 2:
{
gray = (png_uint_16)((gray&0x03)*0x55);
@@ -3782,6 +3848,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
}
break;
}
+
case 4:
{
gray = (png_uint_16)((gray&0x0f)*0x11);
@@ -3805,6 +3872,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
break;
}
}
+
row_info->bit_depth = 8;
row_info->pixel_depth = 8;
row_info->rowbytes = row_width;
@@ -3826,6 +3894,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
*dp-- = *sp--;
}
}
+
else if (row_info->bit_depth == 16)
{
png_byte gray_high = (gray >> 8) & 0xff;
@@ -3848,6 +3917,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
*dp-- = *sp--;
}
}
+
row_info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
row_info->channels = 2;
row_info->pixel_depth = (png_byte)(row_info->bit_depth << 1);
@@ -3945,13 +4015,13 @@ png_do_dither(png_row_infop row_info, png_bytep row,
g = *sp++;
b = *sp++;
- /* this looks real messy, but the compiler will reduce
- it down to a reasonable formula. For example, with
- 5 bits per color, we get:
- p = (((r >> 3) & 0x1f) << 10) |
- (((g >> 3) & 0x1f) << 5) |
- ((b >> 3) & 0x1f);
- */
+ /* This looks real messy, but the compiler will reduce
+ * it down to a reasonable formula. For example, with
+ * 5 bits per color, we get:
+ * p = (((r >> 3) & 0x1f) << 10) |
+ * (((g >> 3) & 0x1f) << 5) |
+ * ((b >> 3) & 0x1f);
+ */
p = (((r >> (8 - PNG_DITHER_RED_BITS)) &
((1 << PNG_DITHER_RED_BITS) - 1)) <<
(PNG_DITHER_GREEN_BITS + PNG_DITHER_BLUE_BITS)) |
@@ -4032,6 +4102,7 @@ png_build_gamma_table(png_structp png_ptr)
if (png_ptr->screen_gamma > .000001)
g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
+
else
g = 1.0;
@@ -4066,8 +4137,9 @@ png_build_gamma_table(png_structp png_ptr)
if (png_ptr->screen_gamma > 0.000001)
g = 1.0 / png_ptr->screen_gamma;
+
else
- g = png_ptr->gamma; /* probably doing rgb_to_gray */
+ g = png_ptr->gamma; /* Probably doing rgb_to_gray */
for (i = 0; i < 256; i++)
{
@@ -4088,8 +4160,10 @@ png_build_gamma_table(png_structp png_ptr)
if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
{
sig_bit = (int)png_ptr->sig_bit.red;
+
if ((int)png_ptr->sig_bit.green > sig_bit)
sig_bit = png_ptr->sig_bit.green;
+
if ((int)png_ptr->sig_bit.blue > sig_bit)
sig_bit = png_ptr->sig_bit.blue;
}
@@ -4100,6 +4174,7 @@ png_build_gamma_table(png_structp png_ptr)
if (sig_bit > 0)
shift = 16 - sig_bit;
+
else
shift = 0;
@@ -4111,6 +4186,7 @@ png_build_gamma_table(png_structp png_ptr)
if (shift > 8)
shift = 8;
+
if (shift < 0)
shift = 0;
@@ -4125,14 +4201,13 @@ png_build_gamma_table(png_structp png_ptr)
png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr,
(png_uint_32)(num * png_sizeof(png_uint_16p)));
+ png_memset(png_ptr->gamma_16_table, 0, num * png_sizeof(png_uint_16p));
if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
{
double fin, fout;
png_uint_32 last, max;
- png_memset(png_ptr->gamma_16_table, 0, num * png_sizeof(png_uint_16p));
-
for (i = 0; i < num; i++)
{
png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr,
@@ -4169,6 +4244,7 @@ png_build_gamma_table(png_structp png_ptr)
(png_uint_32)(256 * png_sizeof(png_uint_16)));
ig = (((png_uint_32)i * (png_uint_32)png_gamma_shift[shift]) >> 4);
+
for (j = 0; j < 256; j++)
{
png_ptr->gamma_16_table[i][j] =
@@ -4187,8 +4263,7 @@ png_build_gamma_table(png_structp png_ptr)
png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr,
(png_uint_32)(num * png_sizeof(png_uint_16p )));
-
- png_memset(png_ptr->gamma_16_to_1, 0, num * png_sizeof(png_uint_16p));
+ png_memset(png_ptr->gamma_16_to_1, 0, num * png_sizeof(png_uint_16p));
for (i = 0; i < num; i++)
{
@@ -4207,14 +4282,14 @@ png_build_gamma_table(png_structp png_ptr)
if (png_ptr->screen_gamma > 0.000001)
g = 1.0 / png_ptr->screen_gamma;
+
else
- g = png_ptr->gamma; /* probably doing rgb_to_gray */
+ g = png_ptr->gamma; /* Probably doing rgb_to_gray */
png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr,
(png_uint_32)(num * png_sizeof(png_uint_16p)));
-
png_memset(png_ptr->gamma_16_from_1, 0,
- num * png_sizeof(png_uint_16p));
+ num * png_sizeof(png_uint_16p));
for (i = 0; i < num; i++)
{
@@ -4223,6 +4298,7 @@ png_build_gamma_table(png_structp png_ptr)
ig = (((png_uint_32)i *
(png_uint_32)png_gamma_shift[shift]) >> 4);
+
for (j = 0; j < 256; j++)
{
png_ptr->gamma_16_from_1[i][j] =
@@ -4239,7 +4315,7 @@ png_build_gamma_table(png_structp png_ptr)
#endif
#if defined(PNG_MNG_FEATURES_SUPPORTED)
-/* undoes intrapixel differencing */
+/* Undoes intrapixel differencing */
void /* PRIVATE */
png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
{
@@ -4259,8 +4335,10 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
bytes_per_pixel = 3;
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
bytes_per_pixel = 4;
+
else
return;
@@ -4277,8 +4355,10 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
bytes_per_pixel = 6;
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
bytes_per_pixel = 8;
+
else
return;
diff --git a/png/pngrutil.c b/png/pngrutil.c
index 5fafde6c3..f656dfbdf 100644
--- a/png/pngrutil.c
+++ b/png/pngrutil.c
@@ -1,12 +1,15 @@
/* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.2.34 [December 18, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.38 [July 16, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file contains routines that are only called from within
* libpng itself during the course of reading an image.
*/
@@ -21,7 +24,7 @@
#ifdef PNG_FLOATING_POINT_SUPPORTED
# if defined(WIN32_WCE_OLD)
-/* strtod() function is not supported on WindowsCE */
+/* The strtod() function is not supported on WindowsCE */
__inline double png_strtod(png_structp png_ptr, PNG_CONST char *nptr, char **endptr)
{
double result = 0;
@@ -76,7 +79,8 @@ png_get_uint_32(png_bytep buf)
/* Grab a signed 32-bit integer from a buffer in big-endian format. The
* data is stored in the PNG file in two's complement format, and it is
- * assumed that the machine format for signed integers is the same. */
+ * assumed that the machine format for signed integers is the same.
+ */
png_int_32 PNGAPI
png_get_int_32(png_bytep buf)
{
@@ -108,21 +112,21 @@ png_read_chunk_header(png_structp png_ptr)
png_byte buf[8];
png_uint_32 length;
- /* read the length and the chunk name */
+ /* Read the length and the chunk name */
png_read_data(png_ptr, buf, 8);
length = png_get_uint_31(png_ptr, buf);
- /* put the chunk name into png_ptr->chunk_name */
+ /* Put the chunk name into png_ptr->chunk_name */
png_memcpy(png_ptr->chunk_name, buf + 4, 4);
png_debug2(0, "Reading %s chunk, length = %lu",
png_ptr->chunk_name, length);
- /* reset the crc and run it over the chunk name */
+ /* Reset the crc and run it over the chunk name */
png_reset_crc(png_ptr);
png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
- /* check to see if chunk name is valid */
+ /* Check to see if chunk name is valid */
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
return length;
@@ -132,15 +136,17 @@ png_read_chunk_header(png_structp png_ptr)
void /* PRIVATE */
png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
{
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_read_data(png_ptr, buf, length);
png_calculate_crc(png_ptr, buf, length);
}
/* Optionally skip data and then check the CRC. Depending on whether we
- are reading a ancillary or critical chunk, and how the program has set
- things up, we may calculate the CRC on the data and print a message.
- Returns '1' if there was a CRC error, '0' otherwise. */
+ * are reading a ancillary or critical chunk, and how the program has set
+ * things up, we may calculate the CRC on the data and print a message.
+ * Returns '1' if there was a CRC error, '0' otherwise.
+ */
int /* PRIVATE */
png_crc_finish(png_structp png_ptr, png_uint_32 skip)
{
@@ -159,7 +165,7 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
if (png_crc_error(png_ptr))
{
if (((png_ptr->chunk_name[0] & 0x20) && /* Ancillary */
- !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
+ !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) ||
(!(png_ptr->chunk_name[0] & 0x20) && /* Critical */
(png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)))
{
@@ -176,7 +182,8 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
}
/* Compare the CRC stored in the PNG file with that calculated by libpng from
- the data it has read thus far. */
+ * the data it has read thus far.
+ */
int /* PRIVATE */
png_crc_error(png_structp png_ptr)
{
@@ -331,14 +338,17 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
png_snprintf(umsg, 52,
"Buffer error in compressed datastream in %s chunk",
png_ptr->chunk_name);
+
else if (ret == Z_DATA_ERROR)
png_snprintf(umsg, 52,
"Data error in compressed datastream in %s chunk",
png_ptr->chunk_name);
+
else
png_snprintf(umsg, 52,
"Incomplete compressed datastream in %s chunk",
png_ptr->chunk_name);
+
png_warning(png_ptr, umsg);
#else
png_warning(png_ptr,
@@ -383,7 +393,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
}
#endif
-/* read and check the IDHR chunk */
+/* Read and check the IDHR chunk */
void /* PRIVATE */
png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -397,7 +407,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (png_ptr->mode & PNG_HAVE_IHDR)
png_error(png_ptr, "Out of place IHDR");
- /* check the length */
+ /* Check the length */
if (length != 13)
png_error(png_ptr, "Invalid IHDR chunk");
@@ -414,7 +424,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
filter_type = buf[11];
interlace_type = buf[12];
- /* set internal variables */
+ /* Set internal variables */
png_ptr->width = width;
png_ptr->height = height;
png_ptr->bit_depth = (png_byte)bit_depth;
@@ -425,25 +435,28 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
png_ptr->compression_type = (png_byte)compression_type;
- /* find number of channels */
+ /* Find number of channels */
switch (png_ptr->color_type)
{
case PNG_COLOR_TYPE_GRAY:
case PNG_COLOR_TYPE_PALETTE:
png_ptr->channels = 1;
break;
+
case PNG_COLOR_TYPE_RGB:
png_ptr->channels = 3;
break;
+
case PNG_COLOR_TYPE_GRAY_ALPHA:
png_ptr->channels = 2;
break;
+
case PNG_COLOR_TYPE_RGB_ALPHA:
png_ptr->channels = 4;
break;
}
- /* set up other useful info */
+ /* Set up other useful info */
png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth *
png_ptr->channels);
png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width);
@@ -454,7 +467,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
color_type, interlace_type, compression_type, filter_type);
}
-/* read and check the palette */
+/* Read and check the palette */
void /* PRIVATE */
png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -468,12 +481,14 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before PLTE");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid PLTE after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->mode & PNG_HAVE_PLTE)
png_error(png_ptr, "Duplicate PLTE chunk");
@@ -502,6 +517,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_finish(png_ptr, length);
return;
}
+
else
{
png_error(png_ptr, "Invalid palette chunk");
@@ -526,7 +542,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_byte buf[3];
png_crc_read(png_ptr, buf, 3);
- /* don't depend upon png_color being any order */
+ /* Don't depend upon png_color being any order */
palette[i].red = buf[0];
palette[i].green = buf[1];
palette[i].blue = buf[2];
@@ -534,9 +550,10 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
/* If we actually NEED the PLTE chunk (ie for a paletted image), we do
- whatever the normal CRC configuration tells us. However, if we
- have an RGB image, the PLTE can be considered ancillary, so
- we will act as though it is. */
+ * whatever the normal CRC configuration tells us. However, if we
+ * have an RGB image, the PLTE can be considered ancillary, so
+ * we will act as though it is.
+ */
#if !defined(PNG_READ_OPT_PLTE_SUPPORTED)
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
#endif
@@ -611,7 +628,7 @@ png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
png_crc_finish(png_ptr, length);
- info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
+ info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */
}
#if defined(PNG_READ_gAMA_SUPPORTED)
@@ -661,7 +678,7 @@ png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
igamma = (png_fixed_point)png_get_uint_32(buf);
- /* check for zero gamma */
+ /* Check for zero gamma */
if (igamma == 0)
{
png_warning(png_ptr,
@@ -925,7 +942,7 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
intent = buf[0];
- /* check for bad intent */
+ /* Check for bad intent */
if (intent >= PNG_sRGB_INTENT_LAST)
{
png_warning(png_ptr, "Unknown sRGB intent");
@@ -1040,12 +1057,13 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->chunkdata[slength] = 0x00;
for (profile = png_ptr->chunkdata; *profile; profile++)
- /* empty loop to find end of name */ ;
+ /* Empty loop to find end of name */ ;
++profile;
- /* there should be at least one zero (the compression type byte)
- following the separator, and we should be on it */
+ /* There should be at least one zero (the compression type byte)
+ * following the separator, and we should be on it
+ */
if ( profile >= png_ptr->chunkdata + slength - 1)
{
png_free(png_ptr, png_ptr->chunkdata);
@@ -1054,7 +1072,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- /* compression_type should always be zero */
+ /* Compression_type should always be zero */
compression_type = *profile++;
if (compression_type)
{
@@ -1152,10 +1170,10 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->chunkdata[slength] = 0x00;
for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start; entry_start++)
- /* empty loop to find end of name */ ;
+ /* Empty loop to find end of name */ ;
++entry_start;
- /* a sample depth should follow the separator, and we should be on it */
+ /* A sample depth should follow the separator, and we should be on it */
if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2)
{
png_free(png_ptr, png_ptr->chunkdata);
@@ -1168,7 +1186,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
entry_size = (new_palette.depth == 8 ? 6 : 10);
data_length = (slength - (entry_start - (png_bytep)png_ptr->chunkdata));
- /* integrity-check the data length */
+ /* Integrity-check the data length */
if (data_length % entry_size)
{
png_free(png_ptr, png_ptr->chunkdata);
@@ -1236,7 +1254,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
#endif
- /* discard all chunk data except the name and stash that */
+ /* Discard all chunk data except the name and stash that */
new_palette.name = png_ptr->chunkdata;
png_set_sPLT(png_ptr, info_ptr, &new_palette, 1);
@@ -1572,7 +1590,7 @@ png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
#if defined(PNG_READ_pCAL_SUPPORTED)
-/* read the pCAL chunk (described in the PNG Extensions document) */
+/* Read the pCAL chunk (described in the PNG Extensions document) */
void /* PRIVATE */
png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1619,11 +1637,11 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- png_ptr->chunkdata[slength] = 0x00; /* null terminate the last string */
+ png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
png_debug(3, "Finding end of pCAL purpose string");
for (buf = png_ptr->chunkdata; *buf; buf++)
- /* empty loop */ ;
+ /* Empty loop */ ;
endptr = png_ptr->chunkdata + slength;
@@ -1706,7 +1724,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
#if defined(PNG_READ_sCAL_SUPPORTED)
-/* read the sCAL chunk */
+/* Read the sCAL chunk */
void /* PRIVATE */
png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -1756,9 +1774,9 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- png_ptr->chunkdata[slength] = 0x00; /* null terminate the last string */
+ png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
- ep = png_ptr->chunkdata + 1; /* skip unit byte */
+ ep = png_ptr->chunkdata + 1; /* Skip unit byte */
#ifdef PNG_FLOATING_POINT_SUPPORTED
width = png_strtod(png_ptr, ep, &vp);
@@ -1780,7 +1798,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
for (ep = png_ptr->chunkdata; *ep; ep++)
- /* empty loop */ ;
+ /* Empty loop */ ;
ep++;
if (png_ptr->chunkdata + slength < ep)
@@ -1944,7 +1962,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
key[slength] = 0x00;
for (text = key; *text; text++)
- /* empty loop to find end of key */ ;
+ /* Empty loop to find end of key */ ;
if (text != key + slength)
text++;
@@ -1979,7 +1997,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
#if defined(PNG_READ_zTXt_SUPPORTED)
-/* note: this does not correctly handle chunks that are > 64K under DOS */
+/* Note: this does not correctly handle chunks that are > 64K under DOS */
void /* PRIVATE */
png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -2028,7 +2046,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->chunkdata[slength] = 0x00;
for (text = png_ptr->chunkdata; *text; text++)
- /* empty loop */ ;
+ /* Empty loop */ ;
/* zTXt must have some text after the chunkdataword */
if (text >= png_ptr->chunkdata + slength - 2)
@@ -2046,7 +2064,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_warning(png_ptr, "Unknown compression type in zTXt chunk");
comp_type = PNG_TEXT_COMPRESSION_zTXt;
}
- text++; /* skip the compression_method byte */
+ text++; /* Skip the compression_method byte */
}
prefix_len = text - png_ptr->chunkdata;
@@ -2083,7 +2101,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#endif
#if defined(PNG_READ_iTXt_SUPPORTED)
-/* note: this does not correctly handle chunks that are > 64K under DOS */
+/* Note: this does not correctly handle chunks that are > 64K under DOS */
void /* PRIVATE */
png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
@@ -2133,12 +2151,13 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->chunkdata[slength] = 0x00;
for (lang = png_ptr->chunkdata; *lang; lang++)
- /* empty loop */ ;
- lang++; /* skip NUL separator */
+ /* Empty loop */ ;
+ lang++; /* Skip NUL separator */
/* iTXt must have a language tag (possibly empty), two compression bytes,
- translated keyword (possibly empty), and possibly some text after the
- keyword */
+ * translated keyword (possibly empty), and possibly some text after the
+ * keyword
+ */
if (lang >= png_ptr->chunkdata + slength - 3)
{
@@ -2154,8 +2173,8 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
for (lang_key = lang; *lang_key; lang_key++)
- /* empty loop */ ;
- lang_key++; /* skip NUL separator */
+ /* Empty loop */ ;
+ lang_key++; /* Skip NUL separator */
if (lang_key >= png_ptr->chunkdata + slength)
{
@@ -2166,8 +2185,8 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
for (text = lang_key; *text; text++)
- /* empty loop */ ;
- text++; /* skip NUL separator */
+ /* Empty loop */ ;
+ text++; /* Skip NUL separator */
if (text >= png_ptr->chunkdata + slength)
{
png_warning(png_ptr, "Malformed iTXt chunk");
@@ -2229,13 +2248,13 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#ifdef PNG_USE_LOCAL_ARRAYS
PNG_CONST PNG_IDAT;
#endif
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* not an IDAT */
+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
png_ptr->mode |= PNG_AFTER_IDAT;
}
if (!(png_ptr->chunk_name[0] & 0x20))
{
-#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
@@ -2247,8 +2266,11 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
- if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) ||
- (png_ptr->read_user_chunk_fn != NULL))
+ if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
+#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+ || (png_ptr->read_user_chunk_fn != NULL)
+#endif
+ )
{
#ifdef PNG_MAX_MALLOC_64K
if (length > (png_uint_32)65535L)
@@ -2259,7 +2281,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
#endif
png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
+ (png_charp)png_ptr->chunk_name,
png_sizeof(png_ptr->unknown_chunk.name));
png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1] = '\0';
png_ptr->unknown_chunk.size = (png_size_t)length;
@@ -2273,7 +2295,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
if (png_ptr->read_user_chunk_fn != NULL)
{
- /* callback to user unknown chunk handler */
+ /* Callback to user unknown chunk handler */
int ret;
ret = (*(png_ptr->read_user_chunk_fn))
(png_ptr, &png_ptr->unknown_chunk);
@@ -2282,8 +2304,10 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (ret == 0)
{
if (!(png_ptr->chunk_name[0] & 0x20))
+#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS)
+#endif
png_chunk_error(png_ptr, "unknown critical chunk");
png_set_unknown_chunks(png_ptr, info_ptr,
&png_ptr->unknown_chunk, 1);
@@ -2302,7 +2326,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_crc_finish(png_ptr, skip);
#if !defined(PNG_READ_USER_CHUNKS_SUPPORTED)
- info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
+ info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */
#endif
}
@@ -2550,8 +2574,8 @@ png_do_read_interlace(png_structp png_ptr)
int pass = png_ptr->pass;
png_uint_32 transformations = png_ptr->transformations;
#ifdef PNG_USE_LOCAL_ARRAYS
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* offset to next interlace block */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Offset to next interlace block */
PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
#endif
@@ -2759,7 +2783,7 @@ png_do_read_interlace(png_structp png_ptr)
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
}
#if !defined(PNG_READ_PACKSWAP_SUPPORTED)
- transformations = transformations; /* silence compiler warning */
+ transformations = transformations; /* Silence compiler warning */
#endif
}
#endif /* PNG_READ_INTERLACING_SUPPORTED */
@@ -2843,7 +2867,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
rp++;
}
- for (i = 0; i < istop; i++) /* use leftover rp,pp */
+ for (i = 0; i < istop; i++) /* Use leftover rp,pp */
{
int a, b, c, pa, pb, pc, p;
@@ -2887,23 +2911,24 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
}
}
+#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
void /* PRIVATE */
png_read_finish_row(png_structp png_ptr)
{
#ifdef PNG_USE_LOCAL_ARRAYS
#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* start of interlace block */
+ /* Start of interlace block */
PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
- /* offset to next interlace block */
+ /* Offset to next interlace block */
PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
- /* start of interlace block in the y direction */
+ /* Start of interlace block in the y direction */
PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
- /* offset to next interlace block in the y direction */
+ /* Offset to next interlace block in the y direction */
PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif /* PNG_READ_INTERLACING_SUPPORTED */
#endif
@@ -3018,24 +3043,25 @@ png_read_finish_row(png_structp png_ptr)
png_ptr->mode |= PNG_AFTER_IDAT;
}
+#endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
void /* PRIVATE */
png_read_start_row(png_structp png_ptr)
{
#ifdef PNG_USE_LOCAL_ARRAYS
#ifdef PNG_READ_INTERLACING_SUPPORTED
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* start of interlace block */
+ /* Start of interlace block */
PNG_CONST int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
- /* offset to next interlace block */
+ /* Offset to next interlace block */
PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
- /* start of interlace block in the y direction */
+ /* Start of interlace block in the y direction */
PNG_CONST int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
- /* offset to next interlace block in the y direction */
+ /* Offset to next interlace block in the y direction */
PNG_CONST int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
#endif
@@ -3172,11 +3198,13 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
}
#endif
- /* align the width on the next larger 8 pixels. Mainly used
- for interlacing */
+ /* Align the width on the next larger 8 pixels. Mainly used
+ * for interlacing
+ */
row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7));
- /* calculate the maximum bytes needed, adding a byte and a pixel
- for safety's sake */
+ /* Calculate the maximum bytes needed, adding a byte and a pixel
+ * for safety's sake
+ */
row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) +
1 + ((max_pixel_depth + 7) >> 3);
#ifdef PNG_MAX_MALLOC_64K
@@ -3187,27 +3215,30 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (row_bytes + 64 > png_ptr->old_big_row_buf_size)
{
png_free(png_ptr, png_ptr->big_row_buf);
- png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
- png_ptr->row_buf = png_ptr->big_row_buf+32;
- png_ptr->old_big_row_buf_size = row_bytes+64;
+ png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 64);
+ if (png_ptr->interlaced)
+ png_memset(png_ptr->big_row_buf, 0, row_bytes + 64);
+ png_ptr->row_buf = png_ptr->big_row_buf + 32;
+ png_ptr->old_big_row_buf_size = row_bytes + 64;
}
#ifdef PNG_MAX_MALLOC_64K
- if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)
+ if ((png_uint_32)row_bytes + 1 > (png_uint_32)65536L)
png_error(png_ptr, "This image requires a row greater than 64KB");
#endif
- if ((png_uint_32)png_ptr->rowbytes > (png_uint_32)(PNG_SIZE_MAX - 1))
+ if ((png_uint_32)row_bytes > (png_uint_32)(PNG_SIZE_MAX - 1))
png_error(png_ptr, "Row has too many bytes to allocate in memory.");
- if (png_ptr->rowbytes+1 > png_ptr->old_prev_row_size)
+ if (row_bytes + 1 > png_ptr->old_prev_row_size)
{
- png_free(png_ptr, png_ptr->prev_row);
- png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
- png_ptr->rowbytes + 1));
- png_ptr->old_prev_row_size = png_ptr->rowbytes+1;
+ png_free(png_ptr, png_ptr->prev_row);
+ png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
+ row_bytes + 1));
+ png_memset_check(png_ptr, png_ptr->prev_row, 0, row_bytes + 1);
+ png_ptr->old_prev_row_size = row_bytes + 1;
}
- png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
+ png_ptr->rowbytes = row_bytes;
png_debug1(3, "width = %lu,", png_ptr->width);
png_debug1(3, "height = %lu,", png_ptr->height);
diff --git a/png/pngset.c b/png/pngset.c
index 9e12b0db8..9e1b88561 100644
--- a/png/pngset.c
+++ b/png/pngset.c
@@ -1,12 +1,15 @@
/* pngset.c - storage of image information into info struct
*
- * Last changed in libpng 1.2.35 [February 14, 2009]
- * For conditions of distribution and use, see copyright notice in png.h
+ * Last changed in libpng 1.2.40 [September 10, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* The functions here are used during reads to store data from the file
* into the info struct, and during writes to store application data
* into the info struct for writing into the file. This abstracts the
@@ -22,6 +25,7 @@ void PNGAPI
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
{
png_debug1(1, "in %s storage function", "bKGD");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -38,6 +42,7 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
double green_x, double green_y, double blue_x, double blue_y)
{
png_debug1(1, "in %s storage function", "cHRM");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -71,6 +76,7 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
png_fixed_point blue_x, png_fixed_point blue_y)
{
png_debug1(1, "in %s storage function", "cHRM fixed");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -79,25 +85,25 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
#endif
{
- info_ptr->int_x_white = white_x;
- info_ptr->int_y_white = white_y;
- info_ptr->int_x_red = red_x;
- info_ptr->int_y_red = red_y;
- info_ptr->int_x_green = green_x;
- info_ptr->int_y_green = green_y;
- info_ptr->int_x_blue = blue_x;
- info_ptr->int_y_blue = blue_y;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- info_ptr->x_white = (float)(white_x/100000.);
- info_ptr->y_white = (float)(white_y/100000.);
- info_ptr->x_red = (float)( red_x/100000.);
- info_ptr->y_red = (float)( red_y/100000.);
- info_ptr->x_green = (float)(green_x/100000.);
- info_ptr->y_green = (float)(green_y/100000.);
- info_ptr->x_blue = (float)( blue_x/100000.);
- info_ptr->y_blue = (float)( blue_y/100000.);
+ info_ptr->int_x_white = white_x;
+ info_ptr->int_y_white = white_y;
+ info_ptr->int_x_red = red_x;
+ info_ptr->int_y_red = red_y;
+ info_ptr->int_x_green = green_x;
+ info_ptr->int_y_green = green_y;
+ info_ptr->int_x_blue = blue_x;
+ info_ptr->int_y_blue = blue_y;
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+ info_ptr->x_white = (float)(white_x/100000.);
+ info_ptr->y_white = (float)(white_y/100000.);
+ info_ptr->x_red = (float)( red_x/100000.);
+ info_ptr->y_red = (float)( red_y/100000.);
+ info_ptr->x_green = (float)(green_x/100000.);
+ info_ptr->y_green = (float)(green_y/100000.);
+ info_ptr->x_blue = (float)( blue_x/100000.);
+ info_ptr->y_blue = (float)( blue_y/100000.);
#endif
- info_ptr->valid |= PNG_INFO_cHRM;
+ info_ptr->valid |= PNG_INFO_cHRM;
}
}
#endif /* PNG_FIXED_POINT_SUPPORTED */
@@ -108,8 +114,10 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
void PNGAPI
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
{
- double gamma;
+ double png_gamma;
+
png_debug1(1, "in %s storage function", "gAMA");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -117,16 +125,16 @@ png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
if (file_gamma > 21474.83)
{
png_warning(png_ptr, "Limiting gamma to 21474.83");
- gamma=21474.83;
+ png_gamma=21474.83;
}
else
- gamma = file_gamma;
- info_ptr->gamma = (float)gamma;
+ png_gamma = file_gamma;
+ info_ptr->gamma = (float)png_gamma;
#ifdef PNG_FIXED_POINT_SUPPORTED
- info_ptr->int_gamma = (int)(gamma*100000.+.5);
+ info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
#endif
info_ptr->valid |= PNG_INFO_gAMA;
- if (gamma == 0.0)
+ if (png_gamma == 0.0)
png_warning(png_ptr, "Setting gamma=0");
}
#endif
@@ -134,35 +142,36 @@ void PNGAPI
png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
int_gamma)
{
- png_fixed_point gamma;
+ png_fixed_point png_gamma;
png_debug1(1, "in %s storage function", "gAMA");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
- if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
+ if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
{
- png_warning(png_ptr, "Limiting gamma to 21474.83");
- gamma=PNG_UINT_31_MAX;
+ png_warning(png_ptr, "Limiting gamma to 21474.83");
+ png_gamma=PNG_UINT_31_MAX;
}
else
{
- if (int_gamma < 0)
- {
- png_warning(png_ptr, "Setting negative gamma to zero");
- gamma = 0;
- }
- else
- gamma = int_gamma;
+ if (int_gamma < 0)
+ {
+ png_warning(png_ptr, "Setting negative gamma to zero");
+ png_gamma = 0;
+ }
+ else
+ png_gamma = int_gamma;
}
#ifdef PNG_FLOATING_POINT_SUPPORTED
- info_ptr->gamma = (float)(gamma/100000.);
+ info_ptr->gamma = (float)(png_gamma/100000.);
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
- info_ptr->int_gamma = gamma;
+ info_ptr->int_gamma = png_gamma;
#endif
info_ptr->valid |= PNG_INFO_gAMA;
- if (gamma == 0)
+ if (png_gamma == 0)
png_warning(png_ptr, "Setting gamma=0");
}
#endif
@@ -174,31 +183,34 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
int i;
png_debug1(1, "in %s storage function", "hIST");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
+
if (info_ptr->num_palette == 0 || info_ptr->num_palette
> PNG_MAX_PALETTE_LENGTH)
{
- png_warning(png_ptr,
- "Invalid palette size, hIST allocation skipped.");
- return;
+ png_warning(png_ptr,
+ "Invalid palette size, hIST allocation skipped.");
+ return;
}
#ifdef PNG_FREE_ME_SUPPORTED
png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
#endif
- /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
- 1.2.1 */
+ /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
+ * version 1.2.1
+ */
png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
(png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
if (png_ptr->hist == NULL)
- {
- png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
- return;
- }
+ {
+ png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
+ return;
+ }
for (i = 0; i < info_ptr->num_palette; i++)
- png_ptr->hist[i] = hist[i];
+ png_ptr->hist[i] = hist[i];
info_ptr->hist = png_ptr->hist;
info_ptr->valid |= PNG_INFO_hIST;
@@ -217,10 +229,11 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
int filter_type)
{
png_debug1(1, "in %s storage function", "IHDR");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
- /* check for width and height valid values */
+ /* Check for width and height valid values */
if (width == 0 || height == 0)
png_error(png_ptr, "Image width or height is zero in IHDR");
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
@@ -240,13 +253,13 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
- 8) /* extra max_pixel_depth pad */
png_warning(png_ptr, "Width is too large for libpng to process pixels");
- /* check other values */
+ /* Check other values */
if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
- bit_depth != 8 && bit_depth != 16)
+ bit_depth != 8 && bit_depth != 16)
png_error(png_ptr, "Invalid bit depth in IHDR");
if (color_type < 0 || color_type == 1 ||
- color_type == 5 || color_type > 6)
+ color_type == 5 || color_type > 6)
png_error(png_ptr, "Invalid color type in IHDR");
if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
@@ -276,9 +289,9 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
if (filter_type != PNG_FILTER_TYPE_BASE)
{
if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
- ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
- (color_type == PNG_COLOR_TYPE_RGB ||
+ (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
+ ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
+ (color_type == PNG_COLOR_TYPE_RGB ||
color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
png_error(png_ptr, "Unknown filter method in IHDR");
if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
@@ -306,7 +319,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
info_ptr->channels++;
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
- /* check for potential overflow */
+ /* Check for potential overflow */
if (width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
- 64 /* bigrowbuf hack */
@@ -324,6 +337,7 @@ png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
png_int_32 offset_x, png_int_32 offset_y, int unit_type)
{
png_debug1(1, "in %s storage function", "oFFs");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -344,6 +358,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
int i;
png_debug1(1, "in %s storage function", "pCAL");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -353,7 +368,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->pcal_purpose == NULL)
{
- png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
+ png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
return;
}
png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
@@ -370,7 +385,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->pcal_units == NULL)
{
- png_warning(png_ptr, "Insufficient memory for pCAL units.");
+ png_warning(png_ptr, "Insufficient memory for pCAL units.");
return;
}
png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
@@ -379,14 +394,10 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
(png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
if (info_ptr->pcal_params == NULL)
{
- png_warning(png_ptr, "Insufficient memory for pCAL params.");
+ png_warning(png_ptr, "Insufficient memory for pCAL params.");
return;
}
-#ifdef PNG_FREE_ME_SUPPORTED
- info_ptr->free_me |= PNG_FREE_PCAL;
-#endif
-
png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
for (i = 0; i < nparams; i++)
@@ -397,13 +408,16 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->pcal_params[i] == NULL)
{
- png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
- return;
+ png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
+ return;
}
png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
}
info_ptr->valid |= PNG_INFO_pCAL;
+#ifdef PNG_FREE_ME_SUPPORTED
+ info_ptr->free_me |= PNG_FREE_PCAL;
+#endif
}
#endif
@@ -414,6 +428,7 @@ png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
int unit, double width, double height)
{
png_debug1(1, "in %s storage function", "sCAL");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -432,6 +447,7 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
png_uint_32 length;
png_debug1(1, "in %s storage function", "sCAL");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -477,6 +493,7 @@ png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 res_x, png_uint_32 res_y, int unit_type)
{
png_debug1(1, "in %s storage function", "pHYs");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -493,19 +510,20 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
{
png_debug1(1, "in %s storage function", "PLTE");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
- {
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Invalid palette length");
- else
- {
+ else
+ {
png_warning(png_ptr, "Invalid palette length");
return;
- }
- }
+ }
+ }
/*
* It may not actually be necessary to set png_ptr->palette here;
@@ -517,8 +535,9 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
#endif
/* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
- of num_palette entries,
- in case of an invalid PNG file that has too-large sample values. */
+ * of num_palette entries, in case of an invalid PNG file that has
+ * too-large sample values.
+ */
png_ptr->palette = (png_colorp)png_malloc(png_ptr,
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
@@ -542,6 +561,7 @@ png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
png_color_8p sig_bit)
{
png_debug1(1, "in %s storage function", "sBIT");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -555,6 +575,7 @@ void PNGAPI
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
{
png_debug1(1, "in %s storage function", "sRGB");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -582,6 +603,7 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
int_green_y, int_blue_x, int_blue_y;
#endif
png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -621,18 +643,18 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
#if !defined(PNG_NO_CHECK_cHRM)
if (png_check_cHRM_fixed(png_ptr,
- int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
- int_green_y, int_blue_x, int_blue_y))
+ int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
+ int_green_y, int_blue_x, int_blue_y))
#endif
{
#ifdef PNG_FIXED_POINT_SUPPORTED
- png_set_cHRM_fixed(png_ptr, info_ptr,
- int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
- int_green_y, int_blue_x, int_blue_y);
+ png_set_cHRM_fixed(png_ptr, info_ptr,
+ int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
+ int_green_y, int_blue_x, int_blue_y);
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_set_cHRM(png_ptr, info_ptr,
- white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
+ white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
#endif
}
#endif /* cHRM */
@@ -651,6 +673,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
png_uint_32 length;
png_debug1(1, "in %s storage function", "iCCP");
+
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
return;
@@ -690,21 +713,22 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
#if defined(PNG_TEXT_SUPPORTED)
void PNGAPI
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
- int num_text)
+ int num_text)
{
int ret;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
if (ret)
- png_error(png_ptr, "Insufficient memory to store text");
+ png_error(png_ptr, "Insufficient memory to store text");
}
int /* PRIVATE */
png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
- int num_text)
+ int num_text)
{
int i;
- png_debug1(1, "in %s storage function", (png_ptr->chunk_name[0] == '\0' ?
+ png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
+ png_ptr->chunk_name[0] == '\0') ?
"text" : (png_const_charp)png_ptr->chunk_name));
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
@@ -726,10 +750,10 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
- {
- png_free(png_ptr, old_text);
- return(1);
- }
+ {
+ png_free(png_ptr, old_text);
+ return(1);
+ }
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
png_sizeof(png_text)));
png_free(png_ptr, old_text);
@@ -741,7 +765,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
- return(1);
+ return(1);
#ifdef PNG_FREE_ME_SUPPORTED
info_ptr->free_me |= PNG_FREE_TEXT;
#endif
@@ -762,26 +786,26 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
if (text_ptr[i].compression <= 0)
{
- lang_len = 0;
- lang_key_len = 0;
+ lang_len = 0;
+ lang_key_len = 0;
}
else
#ifdef PNG_iTXt_SUPPORTED
{
- /* set iTXt data */
- if (text_ptr[i].lang != NULL)
- lang_len = png_strlen(text_ptr[i].lang);
- else
- lang_len = 0;
- if (text_ptr[i].lang_key != NULL)
- lang_key_len = png_strlen(text_ptr[i].lang_key);
- else
- lang_key_len = 0;
+ /* Set iTXt data */
+ if (text_ptr[i].lang != NULL)
+ lang_len = png_strlen(text_ptr[i].lang);
+ else
+ lang_len = 0;
+ if (text_ptr[i].lang_key != NULL)
+ lang_key_len = png_strlen(text_ptr[i].lang_key);
+ else
+ lang_key_len = 0;
}
#else
{
- png_warning(png_ptr, "iTXt chunk not supported.");
- continue;
+ png_warning(png_ptr, "iTXt chunk not supported.");
+ continue;
}
#endif
@@ -805,14 +829,13 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
(png_uint_32)
(key_len + text_length + lang_len + lang_key_len + 4));
if (textp->key == NULL)
- return(1);
+ return(1);
png_debug2(2, "Allocated %lu bytes at %x in png_set_text",
- (png_uint_32)
- (key_len + lang_len + lang_key_len + text_length + 4),
- (int)textp->key);
+ (png_uint_32)
+ (key_len + lang_len + lang_key_len + text_length + 4),
+ (int)textp->key);
- png_memcpy(textp->key, text_ptr[i].key,
- (png_size_t)(key_len));
+ png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
*(textp->key + key_len) = '\0';
#ifdef PNG_iTXt_SUPPORTED
if (text_ptr[i].compression > 0)
@@ -865,6 +888,7 @@ void PNGAPI
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
png_debug1(1, "in %s storage function", "tIME");
+
if (png_ptr == NULL || info_ptr == NULL ||
(png_ptr->mode & PNG_WROTE_tIME))
return;
@@ -880,6 +904,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
png_bytep trans, int num_trans, png_color_16p trans_values)
{
png_debug1(1, "in %s storage function", "tRNS");
+
if (png_ptr == NULL || info_ptr == NULL)
return;
@@ -899,7 +924,7 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
(png_uint_32)PNG_MAX_PALETTE_LENGTH);
if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
- png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
+ png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
}
if (trans_values != NULL)
@@ -911,12 +936,12 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
((int)trans_values->red > sample_max ||
(int)trans_values->green > sample_max ||
(int)trans_values->blue > sample_max)))
- png_warning(png_ptr,
- "tRNS chunk has out-of-range samples for bit_depth");
+ png_warning(png_ptr,
+ "tRNS chunk has out-of-range samples for bit_depth");
png_memcpy(&(info_ptr->trans_values), trans_values,
png_sizeof(png_color_16));
if (num_trans == 0)
- num_trans = 1;
+ num_trans = 1;
}
info_ptr->num_trans = (png_uint_16)num_trans;
@@ -944,127 +969,126 @@ png_set_sPLT(png_structp png_ptr,
* added.
*/
{
- png_sPLT_tp np;
- int i;
+ png_sPLT_tp np;
+ int i;
- if (png_ptr == NULL || info_ptr == NULL)
- return;
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
- np = (png_sPLT_tp)png_malloc_warn(png_ptr,
- (info_ptr->splt_palettes_num + nentries) *
+ np = (png_sPLT_tp)png_malloc_warn(png_ptr,
+ (info_ptr->splt_palettes_num + nentries) *
(png_uint_32)png_sizeof(png_sPLT_t));
- if (np == NULL)
- {
+ if (np == NULL)
+ {
png_warning(png_ptr, "No memory for sPLT palettes.");
- return;
- }
-
- png_memcpy(np, info_ptr->splt_palettes,
- info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
+ return;
+ }
- png_free(png_ptr, info_ptr->splt_palettes);
- info_ptr->splt_palettes=NULL;
+ png_memcpy(np, info_ptr->splt_palettes,
+ info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
+ png_free(png_ptr, info_ptr->splt_palettes);
+ info_ptr->splt_palettes=NULL;
- for (i = 0; i < nentries; i++)
- {
- png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
- png_sPLT_tp from = entries + i;
- png_uint_32 length;
+ for (i = 0; i < nentries; i++)
+ {
+ png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
+ png_sPLT_tp from = entries + i;
+ png_uint_32 length;
- length = png_strlen(from->name) + 1;
+ length = png_strlen(from->name) + 1;
to->name = (png_charp)png_malloc_warn(png_ptr, length);
- if (to->name == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing sPLT chunk");
- continue;
- }
- png_memcpy(to->name, from->name, length);
- to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
+ if (to->name == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing sPLT chunk");
+ continue;
+ }
+ png_memcpy(to->name, from->name, length);
+ to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
(png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
- if (to->entries == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing sPLT chunk");
- png_free(png_ptr, to->name);
- to->name = NULL;
- continue;
- }
- png_memcpy(to->entries, from->entries,
- from->nentries * png_sizeof(png_sPLT_entry));
- to->nentries = from->nentries;
- to->depth = from->depth;
- }
-
- info_ptr->splt_palettes = np;
- info_ptr->splt_palettes_num += nentries;
- info_ptr->valid |= PNG_INFO_sPLT;
+ if (to->entries == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing sPLT chunk");
+ png_free(png_ptr, to->name);
+ to->name = NULL;
+ continue;
+ }
+ png_memcpy(to->entries, from->entries,
+ from->nentries * png_sizeof(png_sPLT_entry));
+ to->nentries = from->nentries;
+ to->depth = from->depth;
+ }
+
+ info_ptr->splt_palettes = np;
+ info_ptr->splt_palettes_num += nentries;
+ info_ptr->valid |= PNG_INFO_sPLT;
#ifdef PNG_FREE_ME_SUPPORTED
- info_ptr->free_me |= PNG_FREE_SPLT;
+ info_ptr->free_me |= PNG_FREE_SPLT;
#endif
}
#endif /* PNG_sPLT_SUPPORTED */
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
void PNGAPI
png_set_unknown_chunks(png_structp png_ptr,
png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
{
- png_unknown_chunkp np;
- int i;
-
- if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
- return;
-
- np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
- (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
- png_sizeof(png_unknown_chunk)));
- if (np == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing unknown chunk.");
- return;
- }
-
- png_memcpy(np, info_ptr->unknown_chunks,
- info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
- png_free(png_ptr, info_ptr->unknown_chunks);
- info_ptr->unknown_chunks=NULL;
-
- for (i = 0; i < num_unknowns; i++)
- {
- png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
- png_unknown_chunkp from = unknowns + i;
-
- png_memcpy((png_charp)to->name,
- (png_charp)from->name,
- png_sizeof(from->name));
- to->name[png_sizeof(to->name)-1] = '\0';
- to->size = from->size;
- /* note our location in the read or write sequence */
- to->location = (png_byte)(png_ptr->mode & 0xff);
-
- if (from->size == 0)
- to->data=NULL;
- else
- {
- to->data = (png_bytep)png_malloc_warn(png_ptr,
- (png_uint_32)from->size);
- if (to->data == NULL)
- {
- png_warning(png_ptr,
- "Out of memory while processing unknown chunk.");
- to->size = 0;
- }
- else
- png_memcpy(to->data, from->data, from->size);
- }
- }
-
- info_ptr->unknown_chunks = np;
- info_ptr->unknown_chunks_num += num_unknowns;
+ png_unknown_chunkp np;
+ int i;
+
+ if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
+ return;
+
+ np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
+ (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
+ png_sizeof(png_unknown_chunk)));
+ if (np == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing unknown chunk.");
+ return;
+ }
+
+ png_memcpy(np, info_ptr->unknown_chunks,
+ info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
+ png_free(png_ptr, info_ptr->unknown_chunks);
+ info_ptr->unknown_chunks=NULL;
+
+ for (i = 0; i < num_unknowns; i++)
+ {
+ png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
+ png_unknown_chunkp from = unknowns + i;
+
+ png_memcpy((png_charp)to->name,
+ (png_charp)from->name,
+ png_sizeof(from->name));
+ to->name[png_sizeof(to->name)-1] = '\0';
+ to->size = from->size;
+ /* Note our location in the read or write sequence */
+ to->location = (png_byte)(png_ptr->mode & 0xff);
+
+ if (from->size == 0)
+ to->data=NULL;
+ else
+ {
+ to->data = (png_bytep)png_malloc_warn(png_ptr,
+ (png_uint_32)from->size);
+ if (to->data == NULL)
+ {
+ png_warning(png_ptr,
+ "Out of memory while processing unknown chunk.");
+ to->size = 0;
+ }
+ else
+ png_memcpy(to->data, from->data, from->size);
+ }
+ }
+
+ info_ptr->unknown_chunks = np;
+ info_ptr->unknown_chunks_num += num_unknowns;
#ifdef PNG_FREE_ME_SUPPORTED
- info_ptr->free_me |= PNG_FREE_UNKN;
+ info_ptr->free_me |= PNG_FREE_UNKN;
#endif
}
void PNGAPI
@@ -1085,7 +1109,9 @@ png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
{
/* This function is deprecated in favor of png_permit_mng_features()
and will be removed from libpng-1.3.0 */
+
png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
+
if (png_ptr == NULL)
return;
png_ptr->mng_features_permitted = (png_byte)
@@ -1100,6 +1126,7 @@ png_uint_32 PNGAPI
png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
{
png_debug(1, "in png_permit_mng_features");
+
if (png_ptr == NULL)
return (png_uint_32)0;
png_ptr->mng_features_permitted =
@@ -1113,44 +1140,44 @@ void PNGAPI
png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
chunk_list, int num_chunks)
{
- png_bytep new_list, p;
- int i, old_num_chunks;
- if (png_ptr == NULL)
- return;
- if (num_chunks == 0)
- {
+ png_bytep new_list, p;
+ int i, old_num_chunks;
+ if (png_ptr == NULL)
+ return;
+ if (num_chunks == 0)
+ {
if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
- png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
+ png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
else
- png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
+ png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
if (keep == PNG_HANDLE_CHUNK_ALWAYS)
- png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
+ png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
else
- png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
+ png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
return;
- }
- if (chunk_list == NULL)
+ }
+ if (chunk_list == NULL)
return;
- old_num_chunks = png_ptr->num_chunk_list;
- new_list=(png_bytep)png_malloc(png_ptr,
- (png_uint_32)
- (5*(num_chunks + old_num_chunks)));
- if (png_ptr->chunk_list != NULL)
- {
- png_memcpy(new_list, png_ptr->chunk_list,
- (png_size_t)(5*old_num_chunks));
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->chunk_list=NULL;
- }
- png_memcpy(new_list + 5*old_num_chunks, chunk_list,
- (png_size_t)(5*num_chunks));
- for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
- *p=(png_byte)keep;
- png_ptr->num_chunk_list = old_num_chunks + num_chunks;
- png_ptr->chunk_list = new_list;
+ old_num_chunks = png_ptr->num_chunk_list;
+ new_list=(png_bytep)png_malloc(png_ptr,
+ (png_uint_32)
+ (5*(num_chunks + old_num_chunks)));
+ if (png_ptr->chunk_list != NULL)
+ {
+ png_memcpy(new_list, png_ptr->chunk_list,
+ (png_size_t)(5*old_num_chunks));
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->chunk_list=NULL;
+ }
+ png_memcpy(new_list + 5*old_num_chunks, chunk_list,
+ (png_size_t)(5*num_chunks));
+ for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
+ *p=(png_byte)keep;
+ png_ptr->num_chunk_list = old_num_chunks + num_chunks;
+ png_ptr->chunk_list = new_list;
#ifdef PNG_FREE_ME_SUPPORTED
- png_ptr->free_me |= PNG_FREE_LIST;
+ png_ptr->free_me |= PNG_FREE_LIST;
#endif
}
#endif
@@ -1161,8 +1188,10 @@ png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
png_user_chunk_ptr read_user_chunk_fn)
{
png_debug(1, "in png_set_read_user_chunk_fn");
+
if (png_ptr == NULL)
return;
+
png_ptr->read_user_chunk_fn = read_user_chunk_fn;
png_ptr->user_chunk_ptr = user_chunk_ptr;
}
@@ -1210,7 +1239,7 @@ png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
#ifndef PNG_1_0_X
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-/* function was added to libpng 1.2.0 and should always exist by default */
+/* Function was added to libpng 1.2.0 and should always exist by default */
void PNGAPI
png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
{
@@ -1220,7 +1249,7 @@ png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
asm_flags = asm_flags; /* Quiet the compiler */
}
-/* this function was added to libpng 1.2.0 */
+/* This function was added to libpng 1.2.0 */
void PNGAPI
png_set_mmx_thresholds (png_structp png_ptr,
png_byte mmx_bitdepth_threshold,
@@ -1236,18 +1265,19 @@ png_set_mmx_thresholds (png_structp png_ptr,
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
-/* this function was added to libpng 1.2.6 */
+/* This function was added to libpng 1.2.6 */
void PNGAPI
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
png_uint_32 user_height_max)
{
- /* Images with dimensions larger than these limits will be
- * rejected by png_set_IHDR(). To accept any PNG datastream
- * regardless of dimensions, set both limits to 0x7ffffffL.
- */
- if (png_ptr == NULL) return;
- png_ptr->user_width_max = user_width_max;
- png_ptr->user_height_max = user_height_max;
+ /* Images with dimensions larger than these limits will be
+ * rejected by png_set_IHDR(). To accept any PNG datastream
+ * regardless of dimensions, set both limits to 0x7ffffffL.
+ */
+ if (png_ptr == NULL)
+ return;
+ png_ptr->user_width_max = user_width_max;
+ png_ptr->user_height_max = user_height_max;
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
diff --git a/png/pngtrans.c b/png/pngtrans.c
index f92f4b02d..6e1870c59 100644
--- a/png/pngtrans.c
+++ b/png/pngtrans.c
@@ -1,11 +1,14 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
- * Last changed in libpng 1.2.30 [August 15, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.36 [May 14, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
#define PNG_INTERNAL
@@ -13,35 +16,38 @@
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* turn on BGR-to-RGB mapping */
+/* Turn on BGR-to-RGB mapping */
void PNGAPI
png_set_bgr(png_structp png_ptr)
{
png_debug(1, "in png_set_bgr");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_BGR;
}
#endif
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* turn on 16 bit byte swapping */
+/* Turn on 16 bit byte swapping */
void PNGAPI
png_set_swap(png_structp png_ptr)
{
png_debug(1, "in png_set_swap");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if (png_ptr->bit_depth == 16)
png_ptr->transformations |= PNG_SWAP_BYTES;
}
#endif
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
-/* turn on pixel packing */
+/* Turn on pixel packing */
void PNGAPI
png_set_packing(png_structp png_ptr)
{
png_debug(1, "in png_set_packing");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if (png_ptr->bit_depth < 8)
{
png_ptr->transformations |= PNG_PACK;
@@ -51,12 +57,13 @@ png_set_packing(png_structp png_ptr)
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-/* turn on packed pixel swapping */
+/* Turn on packed pixel swapping */
void PNGAPI
png_set_packswap(png_structp png_ptr)
{
png_debug(1, "in png_set_packswap");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
if (png_ptr->bit_depth < 8)
png_ptr->transformations |= PNG_PACKSWAP;
}
@@ -67,7 +74,8 @@ void PNGAPI
png_set_shift(png_structp png_ptr, png_color_8p true_bits)
{
png_debug(1, "in png_set_shift");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_SHIFT;
png_ptr->shift = *true_bits;
}
@@ -99,7 +107,8 @@ void PNGAPI
png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
{
png_debug(1, "in png_set_filler");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_FILLER;
png_ptr->filler = (png_byte)filler;
if (filler_loc == PNG_FILLER_AFTER)
@@ -132,7 +141,8 @@ void PNGAPI
png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
{
png_debug(1, "in png_set_add_alpha");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_set_filler(png_ptr, filler, filler_loc);
png_ptr->transformations |= PNG_ADD_ALPHA;
}
@@ -146,7 +156,8 @@ void PNGAPI
png_set_swap_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_swap_alpha");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_SWAP_ALPHA;
}
#endif
@@ -157,7 +168,8 @@ void PNGAPI
png_set_invert_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_invert_alpha");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_INVERT_ALPHA;
}
#endif
@@ -167,11 +179,12 @@ void PNGAPI
png_set_invert_mono(png_structp png_ptr)
{
png_debug(1, "in png_set_invert_mono");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_INVERT_MONO;
}
-/* invert monochrome grayscale data */
+/* Invert monochrome grayscale data */
void /* PRIVATE */
png_do_invert(png_row_infop row_info, png_bytep row)
{
@@ -226,7 +239,7 @@ png_do_invert(png_row_infop row_info, png_bytep row)
#endif
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-/* swaps byte order on 16 bit depth images */
+/* Swaps byte order on 16 bit depth images */
void /* PRIVATE */
png_do_swap(png_row_infop row_info, png_bytep row)
{
@@ -357,7 +370,7 @@ static PNG_CONST png_byte fourbppswaptable[256] = {
0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
};
-/* swaps pixel packing order within bytes */
+/* Swaps pixel packing order within bytes */
void /* PRIVATE */
png_do_packswap(png_row_infop row_info, png_bytep row)
{
@@ -389,7 +402,7 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-/* remove filler or alpha byte(s) */
+/* Remove filler or alpha byte(s) */
void /* PRIVATE */
png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
{
@@ -404,9 +417,9 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
png_uint_32 i;
if ((row_info->color_type == PNG_COLOR_TYPE_RGB ||
- (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
- (flags & PNG_FLAG_STRIP_ALPHA))) &&
- row_info->channels == 4)
+ (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
+ (flags & PNG_FLAG_STRIP_ALPHA))) &&
+ row_info->channels == 4)
{
if (row_info->bit_depth == 8)
{
@@ -547,7 +560,7 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
#endif
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-/* swaps red and blue bytes within a pixel */
+/* Swaps red and blue bytes within a pixel */
void /* PRIVATE */
png_do_bgr(png_row_infop row_info, png_bytep row)
{
@@ -624,14 +637,15 @@ png_do_bgr(png_row_infop row_info, png_bytep row)
#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_LEGACY_SUPPORTED)
+ defined(PNG_LEGACY_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
void PNGAPI
png_set_user_transform_info(png_structp png_ptr, png_voidp
user_transform_ptr, int user_transform_depth, int user_transform_channels)
{
png_debug(1, "in png_set_user_transform_info");
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
png_ptr->user_transform_ptr = user_transform_ptr;
png_ptr->user_transform_depth = (png_byte)user_transform_depth;
@@ -652,7 +666,8 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp
png_voidp PNGAPI
png_get_user_transform_ptr(png_structp png_ptr)
{
- if (png_ptr == NULL) return (NULL);
+ if (png_ptr == NULL)
+ return (NULL);
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
return ((png_voidp)png_ptr->user_transform_ptr);
#else
diff --git a/png/pngwio.c b/png/pngwio.c
index 52eb7c026..f77b2dbd9 100644
--- a/png/pngwio.c
+++ b/png/pngwio.c
@@ -1,12 +1,15 @@
/* pngwio.c - functions for data output
*
- * Last changed in libpng 1.2.35 [February 14, 2009]
- * For conditions of distribution and use, see copyright notice in png.h
+ * Last changed in libpng 1.2.37 [June 4, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ *
* This file provides a location for all output. Users who need
* special handling are expected to write functions that have the same
* arguments as these and perform similar functions, but that possibly
@@ -20,10 +23,11 @@
#ifdef PNG_WRITE_SUPPORTED
/* Write the data to whatever output you are using. The default routine
- writes to a file pointer. Note that this routine sometimes gets called
- with very small lengths, so you should implement some kind of simple
- buffering if you are using unbuffered writes. This should never be asked
- to write more than 64K on a 16 bit machine. */
+ * writes to a file pointer. Note that this routine sometimes gets called
+ * with very small lengths, so you should implement some kind of simple
+ * buffering if you are using unbuffered writes. This should never be asked
+ * to write more than 64K on a 16 bit machine.
+ */
void /* PRIVATE */
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
@@ -36,16 +40,18 @@ png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual writing of data. If you are
- not writing to a standard C stream, you should create a replacement
- write_data function and use it at run time with png_set_write_fn(), rather
- than changing the library. */
+ * not writing to a standard C stream, you should create a replacement
+ * write_data function and use it at run time with png_set_write_fn(), rather
+ * than changing the library.
+ */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#if defined(_WIN32_WCE)
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
@@ -56,10 +62,10 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
png_error(png_ptr, "Write Error");
}
#else
-/* this is the model-independent version. Since the standard I/O library
- can't handle far buffers in the medium and small models, we have to copy
- the data.
-*/
+/* This is the model-independent version. Since the standard I/O library
+ * can't handle far buffers in the medium and small models, we have to copy
+ * the data.
+ */
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
@@ -71,7 +77,8 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
png_FILE_p io_ptr;
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
/* Check if data really is near. If so, use usual code. */
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
@@ -93,7 +100,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
do
{
written = MIN(NEAR_BUF_SIZE, remaining);
- png_memcpy(buf, data, written); /* copy far buffer to near buffer */
+ png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
err = 0;
@@ -102,8 +109,10 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
#endif
if (err != written)
break;
+
else
check += err;
+
data += written;
remaining -= written;
}
@@ -117,8 +126,9 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
#endif
/* This function is called to output any data pending writing (normally
- to disk). After png_flush is called, there should be no data pending
- writing in any buffers. */
+ * to disk). After png_flush is called, there should be no data pending
+ * writing in any buffers.
+ */
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
void /* PRIVATE */
png_flush(png_structp png_ptr)
@@ -134,48 +144,58 @@ png_default_flush(png_structp png_ptr)
#if !defined(_WIN32_WCE)
png_FILE_p io_ptr;
#endif
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
#if !defined(_WIN32_WCE)
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
- if (io_ptr != NULL && fileno(io_ptr) != -1)
- fflush(io_ptr);
+ fflush(io_ptr);
#endif
}
#endif
#endif
/* This function allows the application to supply new output functions for
- libpng if standard C streams aren't being used.
-
- This function takes as its arguments:
- png_ptr - pointer to a png output data structure
- io_ptr - pointer to user supplied structure containing info about
- the output functions. May be NULL.
- write_data_fn - pointer to a new output function that takes as its
- arguments a pointer to a png_struct, a pointer to
- data to be written, and a 32-bit unsigned int that is
- the number of bytes to be written. The new write
- function should call png_error(png_ptr, "Error msg")
- to exit and output any fatal error messages.
- flush_data_fn - pointer to a new flush function that takes as its
- arguments a pointer to a png_struct. After a call to
- the flush function, there should be no data in any buffers
- or pending transmission. If the output method doesn't do
- any buffering of ouput, a function prototype must still be
- supplied although it doesn't have to do anything. If
- PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
- time, output_flush_fn will be ignored, although it must be
- supplied for compatibility. */
+ * libpng if standard C streams aren't being used.
+ *
+ * This function takes as its arguments:
+ * png_ptr - pointer to a png output data structure
+ * io_ptr - pointer to user supplied structure containing info about
+ * the output functions. May be NULL.
+ * write_data_fn - pointer to a new output function that takes as its
+ * arguments a pointer to a png_struct, a pointer to
+ * data to be written, and a 32-bit unsigned int that is
+ * the number of bytes to be written. The new write
+ * function should call png_error(png_ptr, "Error msg")
+ * to exit and output any fatal error messages. May be
+ * NULL, in which case libpng's default function will
+ * be used.
+ * flush_data_fn - pointer to a new flush function that takes as its
+ * arguments a pointer to a png_struct. After a call to
+ * the flush function, there should be no data in any buffers
+ * or pending transmission. If the output method doesn't do
+ * any buffering of ouput, a function prototype must still be
+ * supplied although it doesn't have to do anything. If
+ * PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
+ * time, output_flush_fn will be ignored, although it must be
+ * supplied for compatibility. May be NULL, in which case
+ * libpng's default function will be used, if
+ * PNG_WRITE_FLUSH_SUPPORTED is defined. This is not
+ * a good idea if io_ptr does not point to a standard
+ * *FILE structure.
+ */
void PNGAPI
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
{
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
+
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (write_data_fn != NULL)
png_ptr->write_data_fn = write_data_fn;
+
else
png_ptr->write_data_fn = png_default_write_data;
#else
@@ -186,6 +206,7 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
#if !defined(PNG_NO_STDIO)
if (output_flush_fn != NULL)
png_ptr->output_flush_fn = output_flush_fn;
+
else
png_ptr->output_flush_fn = png_default_flush;
#else
@@ -212,9 +233,11 @@ void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
void FAR *far_ptr;
FP_OFF(near_ptr) = FP_OFF(ptr);
far_ptr = (void FAR *)near_ptr;
+
if (check != 0)
if (FP_SEG(ptr) != FP_SEG(far_ptr))
png_error(png_ptr, "segment lost in conversion");
+
return(near_ptr);
}
# else
@@ -224,9 +247,11 @@ void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
void FAR *far_ptr;
near_ptr = (void FAR *)ptr;
far_ptr = (void FAR *)near_ptr;
+
if (check != 0)
if (far_ptr != ptr)
png_error(png_ptr, "segment lost in conversion");
+
return(near_ptr);
}
# endif
diff --git a/png/pngwrite.c b/png/pngwrite.c
index 8d95788a6..0987612d1 100644
--- a/png/pngwrite.c
+++ b/png/pngwrite.c
@@ -1,14 +1,17 @@
/* pngwrite.c - general routines to write a PNG file
*
- * Last changed in libpng 1.2.34 [December 18, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
-/* get internal access to png.h */
+/* Get internal access to png.h */
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_WRITE_SUPPORTED
@@ -30,7 +33,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
return;
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
{
- png_write_sig(png_ptr); /* write PNG signature */
+ png_write_sig(png_ptr); /* Write PNG signature */
#if defined(PNG_MNG_FEATURES_SUPPORTED)
if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
{
@@ -38,7 +41,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
png_ptr->mng_features_permitted=0;
}
#endif
- /* write IHDR information. */
+ /* Write IHDR information. */
png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
info_ptr->filter_type,
@@ -47,8 +50,9 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
#else
0);
#endif
- /* the rest of these check to see if the valid field has the appropriate
- flag set, and if it does, writes the chunk. */
+ /* The rest of these check to see if the valid field has the appropriate
+ * flag set, and if it does, writes the chunk.
+ */
#if defined(PNG_WRITE_gAMA_SUPPORTED)
if (info_ptr->valid & PNG_INFO_gAMA)
{
@@ -97,14 +101,14 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
if (info_ptr->unknown_chunks_num)
{
- png_unknown_chunk *up;
+ png_unknown_chunk *up;
- png_debug(5, "writing extra chunks");
+ png_debug(5, "writing extra chunks");
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
- {
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
+ {
int keep=png_handle_as_unknown(png_ptr, up->name);
if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && !(up->location & PNG_HAVE_PLTE) &&
@@ -116,7 +120,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
png_warning(png_ptr, "Writing zero-length unknown chunk");
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
- }
+ }
}
#endif
png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
@@ -145,20 +149,20 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_WRITE_tRNS_SUPPORTED)
if (info_ptr->valid & PNG_INFO_tRNS)
- {
+ {
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
- /* invert the alpha channel (in tRNS) */
- if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
- info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- int j;
- for (j=0; j<(int)info_ptr->num_trans; j++)
- info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]);
- }
+ /* Invert the alpha channel (in tRNS) */
+ if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
+ info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ int j;
+ for (j=0; j<(int)info_ptr->num_trans; j++)
+ info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]);
+ }
#endif
png_write_tRNS(png_ptr, info_ptr->trans, &(info_ptr->trans_values),
info_ptr->num_trans, info_ptr->color_type);
- }
+ }
#endif
#if defined(PNG_WRITE_bKGD_SUPPORTED)
if (info_ptr->valid & PNG_INFO_bKGD)
@@ -179,49 +183,56 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
info_ptr->pcal_units, info_ptr->pcal_params);
#endif
-#if defined(PNG_WRITE_sCAL_SUPPORTED)
+
+#if defined(PNG_sCAL_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sCAL)
+#if defined(PNG_WRITE_sCAL_SUPPORTED)
#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO)
png_write_sCAL(png_ptr, (int)info_ptr->scal_unit,
info_ptr->scal_pixel_width, info_ptr->scal_pixel_height);
-#else
+#else /* !FLOATING_POINT */
#ifdef PNG_FIXED_POINT_SUPPORTED
png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit,
info_ptr->scal_s_width, info_ptr->scal_s_height);
-#else
+#endif /* FIXED_POINT */
+#endif /* FLOATING_POINT */
+#else /* !WRITE_sCAL */
png_warning(png_ptr,
"png_write_sCAL not supported; sCAL chunk not written.");
-#endif
-#endif
-#endif
+#endif /* WRITE_sCAL */
+#endif /* sCAL */
+
#if defined(PNG_WRITE_pHYs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_pHYs)
png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
-#endif
+#endif /* pHYs */
+
#if defined(PNG_WRITE_tIME_SUPPORTED)
if (info_ptr->valid & PNG_INFO_tIME)
{
png_write_tIME(png_ptr, &(info_ptr->mod_time));
png_ptr->mode |= PNG_WROTE_tIME;
}
-#endif
+#endif /* tIME */
+
#if defined(PNG_WRITE_sPLT_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sPLT)
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
-#endif
+#endif /* sPLT */
+
#if defined(PNG_WRITE_TEXT_SUPPORTED)
/* Check to see if we need to write text chunks */
for (i = 0; i < info_ptr->num_text; i++)
{
png_debug2(2, "Writing header text chunk %d, type %d", i,
info_ptr->text[i].compression);
- /* an internationalized chunk? */
+ /* An internationalized chunk? */
if (info_ptr->text[i].compression > 0)
{
#if defined(PNG_WRITE_iTXt_SUPPORTED)
- /* write international chunk */
+ /* Write international chunk */
png_write_iTXt(png_ptr,
info_ptr->text[i].compression,
info_ptr->text[i].key,
@@ -238,7 +249,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt)
{
#if defined(PNG_WRITE_zTXt_SUPPORTED)
- /* write compressed chunk */
+ /* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
@@ -251,18 +262,20 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
{
#if defined(PNG_WRITE_tEXt_SUPPORTED)
- /* write uncompressed chunk */
+ /* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text,
0);
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
#else
+ /* Can't get here */
png_warning(png_ptr, "Unable to write uncompressed text");
#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
}
-#endif
+#endif /* tEXt */
+
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
if (info_ptr->unknown_chunks_num)
{
@@ -302,29 +315,29 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
if (!(png_ptr->mode & PNG_HAVE_IDAT))
png_error(png_ptr, "No IDATs written into file");
- /* see if user wants us to write information chunks */
+ /* See if user wants us to write information chunks */
if (info_ptr != NULL)
{
#if defined(PNG_WRITE_TEXT_SUPPORTED)
- int i; /* local index variable */
+ int i; /* Local index variable */
#endif
#if defined(PNG_WRITE_tIME_SUPPORTED)
- /* check to see if user has supplied a time chunk */
+ /* Check to see if user has supplied a time chunk */
if ((info_ptr->valid & PNG_INFO_tIME) &&
!(png_ptr->mode & PNG_WROTE_tIME))
png_write_tIME(png_ptr, &(info_ptr->mod_time));
#endif
#if defined(PNG_WRITE_TEXT_SUPPORTED)
- /* loop through comment chunks */
+ /* Loop through comment chunks */
for (i = 0; i < info_ptr->num_text; i++)
{
png_debug2(2, "Writing trailer text chunk %d, type %d", i,
info_ptr->text[i].compression);
- /* an internationalized chunk? */
+ /* An internationalized chunk? */
if (info_ptr->text[i].compression > 0)
{
#if defined(PNG_WRITE_iTXt_SUPPORTED)
- /* write international chunk */
+ /* Write international chunk */
png_write_iTXt(png_ptr,
info_ptr->text[i].compression,
info_ptr->text[i].key,
@@ -340,7 +353,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
{
#if defined(PNG_WRITE_zTXt_SUPPORTED)
- /* write compressed chunk */
+ /* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
@@ -353,7 +366,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
{
#if defined(PNG_WRITE_tEXt_SUPPORTED)
- /* write uncompressed chunk */
+ /* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0);
#else
@@ -391,7 +404,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
png_ptr->mode |= PNG_AFTER_IDAT;
- /* write end of PNG file */
+ /* Write end of PNG file */
png_write_IEND(png_ptr);
/* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03,
* and restored again in libpng-1.2.30, may cause some applications that
@@ -471,7 +484,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
if (png_ptr == NULL)
return (NULL);
- /* added at libpng-1.2.6 */
+ /* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
@@ -542,7 +555,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
}
}
- /* initialize zbuf - compression buffer */
+ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
@@ -636,7 +649,7 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
{
png_structp png_ptr=*ptr_ptr;
#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf tmp_jmp; /* to save current jump buffer */
+ jmp_buf tmp_jmp; /* To save current jump buffer */
#endif
int i = 0;
@@ -662,7 +675,7 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_debug(1, "in png_write_init_3");
#ifdef PNG_SETJMP_SUPPORTED
- /* save jump buffer and error functions */
+ /* Save jump buffer and error functions */
png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
#endif
@@ -673,24 +686,24 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
*ptr_ptr = png_ptr;
}
- /* reset all variables to 0 */
+ /* Reset all variables to 0 */
png_memset(png_ptr, 0, png_sizeof(png_struct));
- /* added at libpng-1.2.6 */
+ /* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif
#ifdef PNG_SETJMP_SUPPORTED
- /* restore jump buffer */
+ /* Restore jump buffer */
png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
#endif
png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
png_flush_ptr_NULL);
- /* initialize zbuf - compression buffer */
+ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
@@ -710,15 +723,15 @@ void PNGAPI
png_write_rows(png_structp png_ptr, png_bytepp row,
png_uint_32 num_rows)
{
- png_uint_32 i; /* row counter */
- png_bytepp rp; /* row pointer */
+ png_uint_32 i; /* Row counter */
+ png_bytepp rp; /* Row pointer */
png_debug(1, "in png_write_rows");
if (png_ptr == NULL)
return;
- /* loop through the rows */
+ /* Loop through the rows */
for (i = 0, rp = row; i < num_rows; i++, rp++)
{
png_write_row(png_ptr, *rp);
@@ -731,25 +744,26 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
void PNGAPI
png_write_image(png_structp png_ptr, png_bytepp image)
{
- png_uint_32 i; /* row index */
- int pass, num_pass; /* pass variables */
- png_bytepp rp; /* points to current row */
+ png_uint_32 i; /* Row index */
+ int pass, num_pass; /* Pass variables */
+ png_bytepp rp; /* Points to current row */
if (png_ptr == NULL)
return;
png_debug(1, "in png_write_image");
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
- /* intialize interlace handling. If image is not interlaced,
- this will set pass to 1 */
+ /* Initialize interlace handling. If image is not interlaced,
+ * this will set pass to 1
+ */
num_pass = png_set_interlace_handling(png_ptr);
#else
num_pass = 1;
#endif
- /* loop through passes */
+ /* Loop through passes */
for (pass = 0; pass < num_pass; pass++)
{
- /* loop through image */
+ /* Loop through image */
for (i = 0, rp = image; i < png_ptr->height; i++, rp++)
{
png_write_row(png_ptr, *rp);
@@ -757,7 +771,7 @@ png_write_image(png_structp png_ptr, png_bytepp image)
}
}
-/* called by user to write a row of image data */
+/* Called by user to write a row of image data */
void PNGAPI
png_write_row(png_structp png_ptr, png_bytep row)
{
@@ -766,49 +780,49 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_debug2(1, "in png_write_row (row %ld, pass %d)",
png_ptr->row_number, png_ptr->pass);
- /* initialize transformations and other stuff if first time */
+ /* Initialize transformations and other stuff if first time */
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
- /* make sure we wrote the header info */
- if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
- png_error(png_ptr,
- "png_write_info was never called before png_write_row.");
+ /* Make sure we wrote the header info */
+ if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
+ png_error(png_ptr,
+ "png_write_info was never called before png_write_row.");
- /* check for transforms that have been set but were defined out */
+ /* Check for transforms that have been set but were defined out */
#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
- if (png_ptr->transformations & PNG_INVERT_MONO)
- png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_INVERT_MONO)
+ png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED)
- if (png_ptr->transformations & PNG_FILLER)
- png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_FILLER)
+ png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_PACKSWAP)
+ png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED)
- if (png_ptr->transformations & PNG_PACK)
- png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_PACK)
+ png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED)
- if (png_ptr->transformations & PNG_SHIFT)
- png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_SHIFT)
+ png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED)
- if (png_ptr->transformations & PNG_BGR)
- png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_BGR)
+ png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_SWAP_BYTES)
- png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined.");
+ if (png_ptr->transformations & PNG_SWAP_BYTES)
+ png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined.");
#endif
png_write_start_row(png_ptr);
}
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
- /* if interlaced and not interested in row, return */
+ /* If interlaced and not interested in row, return */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
switch (png_ptr->pass)
@@ -866,7 +880,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
}
#endif
- /* set up row info for transformations */
+ /* Set up row info for transformations */
png_ptr->row_info.color_type = png_ptr->color_type;
png_ptr->row_info.width = png_ptr->usr_width;
png_ptr->row_info.channels = png_ptr->usr_channels;
@@ -889,13 +903,13 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_ptr->row_info.rowbytes);
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
- /* handle interlacing */
+ /* Handle interlacing */
if (png_ptr->interlaced && png_ptr->pass < 6 &&
(png_ptr->transformations & PNG_INTERLACE))
{
png_do_write_interlace(&(png_ptr->row_info),
png_ptr->row_buf + 1, png_ptr->pass);
- /* this should always get caught above, but still ... */
+ /* This should always get caught above, but still ... */
if (!(png_ptr->row_info.width))
{
png_write_finish_row(png_ptr);
@@ -904,7 +918,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
}
#endif
- /* handle other transformations */
+ /* Handle other transformations */
if (png_ptr->transformations)
png_do_write_transformations(png_ptr);
@@ -944,7 +958,7 @@ png_set_flush(png_structp png_ptr, int nrows)
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
}
-/* flush the current output buffers now */
+/* Flush the current output buffers now */
void PNGAPI
png_write_flush(png_structp png_ptr)
{
@@ -955,17 +969,17 @@ png_write_flush(png_structp png_ptr)
return;
/* We have already written out all of the data */
if (png_ptr->row_number >= png_ptr->num_rows)
- return;
+ return;
do
{
int ret;
- /* compress the data */
+ /* Compress the data */
ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH);
wrote_IDAT = 0;
- /* check for compression errors */
+ /* Check for compression errors */
if (ret != Z_OK)
{
if (png_ptr->zstream.msg != NULL)
@@ -976,7 +990,7 @@ png_write_flush(png_structp png_ptr)
if (!(png_ptr->zstream.avail_out))
{
- /* write the IDAT and reset the zlib output buffer */
+ /* Write the IDAT and reset the zlib output buffer */
png_write_IDAT(png_ptr, png_ptr->zbuf,
png_ptr->zbuf_size);
png_ptr->zstream.next_out = png_ptr->zbuf;
@@ -988,7 +1002,7 @@ png_write_flush(png_structp png_ptr)
/* If there is any data left to be output, write it into a new IDAT */
if (png_ptr->zbuf_size != png_ptr->zstream.avail_out)
{
- /* write the IDAT and reset the zlib output buffer */
+ /* Write the IDAT and reset the zlib output buffer */
png_write_IDAT(png_ptr, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_ptr->zstream.next_out = png_ptr->zbuf;
@@ -999,7 +1013,7 @@ png_write_flush(png_structp png_ptr)
}
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
-/* free all memory used by the write */
+/* Free all memory used by the write */
void PNGAPI
png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
{
@@ -1075,7 +1089,7 @@ void /* PRIVATE */
png_write_destroy(png_structp png_ptr)
{
#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf tmp_jmp; /* save jump buffer */
+ jmp_buf tmp_jmp; /* Save jump buffer */
#endif
png_error_ptr error_fn;
png_error_ptr warning_fn;
@@ -1085,10 +1099,10 @@ png_write_destroy(png_structp png_ptr)
#endif
png_debug(1, "in png_write_destroy");
- /* free any memory zlib uses */
+ /* Free any memory zlib uses */
deflateEnd(&png_ptr->zstream);
- /* free our memory. png_free checks NULL for us. */
+ /* Free our memory. png_free checks NULL for us. */
png_free(png_ptr, png_ptr->zbuf);
png_free(png_ptr, png_ptr->row_buf);
#ifndef PNG_NO_WRITE_FILTER
@@ -1112,7 +1126,7 @@ png_write_destroy(png_structp png_ptr)
#endif
#ifdef PNG_SETJMP_SUPPORTED
- /* reset structure */
+ /* Reset structure */
png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
#endif
@@ -1415,7 +1429,7 @@ png_set_compression_window_bits(png_structp png_ptr, int window_bits)
else if (window_bits < 8)
png_warning(png_ptr, "Only compression windows >= 256 supported by PNG");
#ifndef WBITS_8_OK
- /* avoid libpng bug with 256-byte windows */
+ /* Avoid libpng bug with 256-byte windows */
if (window_bits == 8)
{
png_warning(png_ptr, "Compression window is being reset to 512");
@@ -1468,9 +1482,9 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL)
return;
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
- /* invert the alpha channel from opacity to transparency */
+ /* Invert the alpha channel from opacity to transparency */
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
- png_set_invert_alpha(png_ptr);
+ png_set_invert_alpha(png_ptr);
#endif
/* Write the file header information. */
@@ -1479,9 +1493,9 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
/* ------ these transformations don't touch the info structure ------- */
#if defined(PNG_WRITE_INVERT_SUPPORTED)
- /* invert monochrome pixels */
+ /* Invert monochrome pixels */
if (transforms & PNG_TRANSFORM_INVERT_MONO)
- png_set_invert_mono(png_ptr);
+ png_set_invert_mono(png_ptr);
#endif
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
@@ -1490,57 +1504,57 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
*/
if ((transforms & PNG_TRANSFORM_SHIFT)
&& (info_ptr->valid & PNG_INFO_sBIT))
- png_set_shift(png_ptr, &info_ptr->sig_bit);
+ png_set_shift(png_ptr, &info_ptr->sig_bit);
#endif
#if defined(PNG_WRITE_PACK_SUPPORTED)
- /* pack pixels into bytes */
+ /* Pack pixels into bytes */
if (transforms & PNG_TRANSFORM_PACKING)
png_set_packing(png_ptr);
#endif
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
- /* swap location of alpha bytes from ARGB to RGBA */
+ /* Swap location of alpha bytes from ARGB to RGBA */
if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
- png_set_swap_alpha(png_ptr);
+ png_set_swap_alpha(png_ptr);
#endif
#if defined(PNG_WRITE_FILLER_SUPPORTED)
/* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
- if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
+ if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
- else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)
+ else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)
png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
#endif
#if defined(PNG_WRITE_BGR_SUPPORTED)
- /* flip BGR pixels to RGB */
+ /* Flip BGR pixels to RGB */
if (transforms & PNG_TRANSFORM_BGR)
- png_set_bgr(png_ptr);
+ png_set_bgr(png_ptr);
#endif
#if defined(PNG_WRITE_SWAP_SUPPORTED)
- /* swap bytes of 16-bit files to most significant byte first */
+ /* Swap bytes of 16-bit files to most significant byte first */
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
- png_set_swap(png_ptr);
+ png_set_swap(png_ptr);
#endif
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED)
- /* swap bits of 1, 2, 4 bit packed pixel formats */
+ /* Swap bits of 1, 2, 4 bit packed pixel formats */
if (transforms & PNG_TRANSFORM_PACKSWAP)
- png_set_packswap(png_ptr);
+ png_set_packswap(png_ptr);
#endif
/* ----------------------- end of transformations ------------------- */
- /* write the bits */
+ /* Write the bits */
if (info_ptr->valid & PNG_INFO_IDAT)
png_write_image(png_ptr, info_ptr->row_pointers);
/* It is REQUIRED to call this to finish writing the rest of the file */
png_write_end(png_ptr, info_ptr);
- transforms = transforms; /* quiet compiler warnings */
+ transforms = transforms; /* Quiet compiler warnings */
params = params;
}
#endif
diff --git a/png/pngwtran.c b/png/pngwtran.c
index 398fc41be..88a7d3cbf 100644
--- a/png/pngwtran.c
+++ b/png/pngwtran.c
@@ -1,11 +1,14 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
- * Last changed in libpng 1.2.9 April 14, 2006
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2006 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
#define PNG_INTERNAL
@@ -26,7 +29,7 @@ png_do_write_transformations(png_structp png_ptr)
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
if (png_ptr->write_user_transform_fn != NULL)
- (*(png_ptr->write_user_transform_fn)) /* user write transform function */
+ (*(png_ptr->write_user_transform_fn)) /* User write transform function */
(png_ptr, /* png_ptr */
&(png_ptr->row_info), /* row_info: */
/* png_uint_32 width; width of row */
@@ -248,7 +251,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
channels++;
}
- /* with low row depths, could only be grayscale, so one channel */
+ /* With low row depths, could only be grayscale, so one channel */
if (row_info->bit_depth < 8)
{
png_bytep bp = row;
@@ -439,7 +442,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
- /* does nothing
+ /* Does nothing
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -457,7 +460,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
for (i = 0, sp = dp = row; i < row_width; i++)
{
- /* does nothing
+ /* Does nothing
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -495,7 +498,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
for (i = 0, sp = dp = row; i < row_width; i++)
{
- /* does nothing
+ /* Does nothing
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*/
@@ -510,7 +513,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
#endif
#if defined(PNG_MNG_FEATURES_SUPPORTED)
-/* undoes intrapixel differencing */
+/* Undoes intrapixel differencing */
void /* PRIVATE */
png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
{
diff --git a/png/pngwutil.c b/png/pngwutil.c
index 957e2668d..f52495c07 100644
--- a/png/pngwutil.c
+++ b/png/pngwutil.c
@@ -1,11 +1,14 @@
/* pngwutil.c - utilities to write a PNG file
*
- * Last changed in libpng 1.2.34 [December 18, 2008]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2008 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.40 [September 10, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
#define PNG_INTERNAL
@@ -60,7 +63,7 @@ png_write_sig(png_structp png_ptr)
{
png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
- /* write the rest of the 8 byte signature */
+ /* Write the rest of the 8 byte signature */
png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
(png_size_t)(8 - png_ptr->sig_bytes));
if (png_ptr->sig_bytes < 3)
@@ -80,7 +83,8 @@ void PNGAPI
png_write_chunk(png_structp png_ptr, png_bytep chunk_name,
png_bytep data, png_size_t length)
{
- if (png_ptr == NULL) return;
+ if (png_ptr == NULL)
+ return;
png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
png_write_chunk_data(png_ptr, data, (png_size_t)length);
png_write_chunk_end(png_ptr);
@@ -98,15 +102,17 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
png_debug2(0, "Writing %s chunk, length = %lu", chunk_name,
(unsigned long)length);
- if (png_ptr == NULL) return;
- /* write the length and the chunk name */
+ if (png_ptr == NULL)
+ return;
+
+ /* Write the length and the chunk name */
png_save_uint_32(buf, length);
png_memcpy(buf + 4, chunk_name, 4);
png_write_data(png_ptr, buf, (png_size_t)8);
- /* put the chunk name into png_ptr->chunk_name */
+ /* Put the chunk name into png_ptr->chunk_name */
png_memcpy(png_ptr->chunk_name, chunk_name, 4);
- /* reset the crc and run it over the chunk name */
+ /* Reset the crc and run it over the chunk name */
png_reset_crc(png_ptr);
png_calculate_crc(png_ptr, chunk_name, (png_size_t)4);
}
@@ -119,12 +125,13 @@ png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
void PNGAPI
png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
- /* write the data, and run the CRC over it */
- if (png_ptr == NULL) return;
+ /* Write the data, and run the CRC over it */
+ if (png_ptr == NULL)
+ return;
if (data != NULL && length > 0)
{
png_write_data(png_ptr, data, length);
- /* update the CRC after writing the data,
+ /* Update the CRC after writing the data,
* in case that the user I/O routine alters it.
*/
png_calculate_crc(png_ptr, data, length);
@@ -139,15 +146,14 @@ png_write_chunk_end(png_structp png_ptr)
if (png_ptr == NULL) return;
- /* write the crc in a single operation */
+ /* Write the crc in a single operation */
png_save_uint_32(buf, png_ptr->crc);
png_write_data(png_ptr, buf, (png_size_t)4);
}
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED)
-/*
- * This pair of functions encapsulates the operation of (a) compressing a
+/* This pair of functions encapsulates the operation of (a) compressing a
* text string, and (b) issuing it later as a series of chunk data writes.
* The compression_state structure is shared context for these functions
* set up by the caller in order to make the whole mess thread-safe.
@@ -155,14 +161,14 @@ png_write_chunk_end(png_structp png_ptr)
typedef struct
{
- char *input; /* the uncompressed input data */
- int input_len; /* its length */
- int num_output_ptr; /* number of output pointers used */
- int max_output_ptr; /* size of output_ptr */
- png_charpp output_ptr; /* array of pointers to output */
+ char *input; /* The uncompressed input data */
+ int input_len; /* Its length */
+ int num_output_ptr; /* Number of output pointers used */
+ int max_output_ptr; /* Size of output_ptr */
+ png_charpp output_ptr; /* Array of pointers to output */
} compression_state;
-/* compress given text into storage in the png_ptr structure */
+/* Compress given text into storage in the png_ptr structure */
static int /* PRIVATE */
png_text_compress(png_structp png_ptr,
png_charp text, png_size_t text_len, int compression,
@@ -176,7 +182,7 @@ png_text_compress(png_structp png_ptr,
comp->input = NULL;
comp->input_len = 0;
- /* we may just want to pass the text right through */
+ /* We may just want to pass the text right through */
if (compression == PNG_TEXT_COMPRESSION_NONE)
{
comp->input = text;
@@ -210,29 +216,29 @@ png_text_compress(png_structp png_ptr,
* wouldn't cause a failure, just a slowdown due to swapping).
*/
- /* set up the compression buffers */
+ /* Set up the compression buffers */
png_ptr->zstream.avail_in = (uInt)text_len;
png_ptr->zstream.next_in = (Bytef *)text;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
- /* this is the same compression loop as in png_write_row() */
+ /* This is the same compression loop as in png_write_row() */
do
{
- /* compress the data */
+ /* Compress the data */
ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
if (ret != Z_OK)
{
- /* error */
+ /* Error */
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
else
png_error(png_ptr, "zlib error");
}
- /* check to see if we need more room */
+ /* Check to see if we need more room */
if (!(png_ptr->zstream.avail_out))
{
- /* make sure the output array has room */
+ /* Make sure the output array has room */
if (comp->num_output_ptr >= comp->max_output_ptr)
{
int old_max;
@@ -257,7 +263,7 @@ png_text_compress(png_structp png_ptr,
(comp->max_output_ptr * png_sizeof(png_charp)));
}
- /* save the data */
+ /* Save the data */
comp->output_ptr[comp->num_output_ptr] =
(png_charp)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
@@ -269,21 +275,21 @@ png_text_compress(png_structp png_ptr,
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
png_ptr->zstream.next_out = png_ptr->zbuf;
}
- /* continue until we don't have any more to compress */
+ /* Continue until we don't have any more to compress */
} while (png_ptr->zstream.avail_in);
- /* finish the compression */
+ /* Finish the compression */
do
{
- /* tell zlib we are finished */
+ /* Tell zlib we are finished */
ret = deflate(&png_ptr->zstream, Z_FINISH);
if (ret == Z_OK)
{
- /* check to see if we need more room */
+ /* Check to see if we need more room */
if (!(png_ptr->zstream.avail_out))
{
- /* check to make sure our output array has room */
+ /* Check to make sure our output array has room */
if (comp->num_output_ptr >= comp->max_output_ptr)
{
int old_max;
@@ -309,7 +315,7 @@ png_text_compress(png_structp png_ptr,
png_sizeof(png_charp)));
}
- /* save off the data */
+ /* Save the data */
comp->output_ptr[comp->num_output_ptr] =
(png_charp)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
@@ -324,7 +330,7 @@ png_text_compress(png_structp png_ptr,
}
else if (ret != Z_STREAM_END)
{
- /* we got an error */
+ /* We got an error */
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
else
@@ -332,7 +338,7 @@ png_text_compress(png_structp png_ptr,
}
} while (ret != Z_STREAM_END);
- /* text length is number of buffers plus last buffer */
+ /* Text length is number of buffers plus last buffer */
text_len = png_ptr->zbuf_size * comp->num_output_ptr;
if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
@@ -340,21 +346,21 @@ png_text_compress(png_structp png_ptr,
return((int)text_len);
}
-/* ship the compressed text out via chunk writes */
+/* Ship the compressed text out via chunk writes */
static void /* PRIVATE */
png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
{
int i;
- /* handle the no-compression case */
+ /* Handle the no-compression case */
if (comp->input)
{
- png_write_chunk_data(png_ptr, (png_bytep)comp->input,
+ png_write_chunk_data(png_ptr, (png_bytep)comp->input,
(png_size_t)comp->input_len);
- return;
+ return;
}
- /* write saved output buffers, if any */
+ /* Write saved output buffers, if any */
for (i = 0; i < comp->num_output_ptr; i++)
{
png_write_chunk_data(png_ptr, (png_bytep)comp->output_ptr[i],
@@ -365,12 +371,12 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
if (comp->max_output_ptr != 0)
png_free(png_ptr, comp->output_ptr);
comp->output_ptr=NULL;
- /* write anything left in zbuf */
+ /* Write anything left in zbuf */
if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
png_write_chunk_data(png_ptr, png_ptr->zbuf,
(png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
- /* reset zlib for another zTXt/iTXt or image data */
+ /* Reset zlib for another zTXt/iTXt or image data */
deflateReset(&png_ptr->zstream);
png_ptr->zstream.data_type = Z_BINARY;
}
@@ -390,9 +396,10 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
#endif
int ret;
- png_byte buf[13]; /* buffer to store the IHDR info */
+ png_byte buf[13]; /* Buffer to store the IHDR info */
png_debug(1, "in png_write_IHDR");
+
/* Check that we have valid input data from the application info */
switch (color_type)
{
@@ -476,7 +483,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
interlace_type=PNG_INTERLACE_NONE;
#endif
- /* save off the relevent information */
+ /* Save the relevent information */
png_ptr->bit_depth = (png_byte)bit_depth;
png_ptr->color_type = (png_byte)color_type;
png_ptr->interlaced = (png_byte)interlace_type;
@@ -489,12 +496,12 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->pixel_depth = (png_byte)(bit_depth * png_ptr->channels);
png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
- /* set the usr info, so any transformations can modify it */
+ /* Set the usr info, so any transformations can modify it */
png_ptr->usr_width = png_ptr->width;
png_ptr->usr_bit_depth = png_ptr->bit_depth;
png_ptr->usr_channels = png_ptr->channels;
- /* pack the header information into the buffer */
+ /* Pack the header information into the buffer */
png_save_uint_32(buf, width);
png_save_uint_32(buf + 4, height);
buf[8] = (png_byte)bit_depth;
@@ -503,10 +510,10 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
buf[11] = (png_byte)filter_type;
buf[12] = (png_byte)interlace_type;
- /* write the chunk */
+ /* Write the chunk */
png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
- /* initialize zlib with PNG info */
+ /* Initialize zlib with PNG info */
png_ptr->zstream.zalloc = png_zalloc;
png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr;
@@ -549,13 +556,13 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
/* libpng is not interested in zstream.data_type */
- /* set it to a predefined value, to avoid its evaluation inside zlib */
+ /* Set it to a predefined value, to avoid its evaluation inside zlib */
png_ptr->zstream.data_type = Z_BINARY;
png_ptr->mode = PNG_HAVE_IHDR;
}
-/* write the palette. We are careful not to trust png_color to be in the
+/* Write the palette. We are careful not to trust png_color to be in the
* correct order for PNG, so people can redefine it to any convenient
* structure.
*/
@@ -570,6 +577,7 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
png_byte buf[3];
png_debug(1, "in png_write_PLTE");
+
if ((
#if defined(PNG_MNG_FEATURES_SUPPORTED)
!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
@@ -622,13 +630,14 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
png_ptr->mode |= PNG_HAVE_PLTE;
}
-/* write an IDAT chunk */
+/* Write an IDAT chunk */
void /* PRIVATE */
png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
{
#ifdef PNG_USE_LOCAL_ARRAYS
PNG_IDAT;
#endif
+
png_debug(1, "in png_write_IDAT");
/* Optimize the CMF field in the zlib stream. */
@@ -639,9 +648,11 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
unsigned int z_cmf = data[0]; /* zlib compression method and flags */
if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70)
{
- /* Avoid memory underflows and multiplication overflows. */
- /* The conditions below are practically always satisfied;
- however, they still must be checked. */
+ /* Avoid memory underflows and multiplication overflows.
+ *
+ * The conditions below are practically always satisfied;
+ * however, they still must be checked.
+ */
if (length >= 2 &&
png_ptr->height < 16384 && png_ptr->width < 16384)
{
@@ -674,21 +685,23 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
png_ptr->mode |= PNG_HAVE_IDAT;
}
-/* write an IEND chunk */
+/* Write an IEND chunk */
void /* PRIVATE */
png_write_IEND(png_structp png_ptr)
{
#ifdef PNG_USE_LOCAL_ARRAYS
PNG_IEND;
#endif
+
png_debug(1, "in png_write_IEND");
+
png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
(png_size_t)0);
png_ptr->mode |= PNG_HAVE_IEND;
}
#if defined(PNG_WRITE_gAMA_SUPPORTED)
-/* write a gAMA chunk */
+/* Write a gAMA chunk */
#ifdef PNG_FLOATING_POINT_SUPPORTED
void /* PRIVATE */
png_write_gAMA(png_structp png_ptr, double file_gamma)
@@ -700,6 +713,7 @@ png_write_gAMA(png_structp png_ptr, double file_gamma)
png_byte buf[4];
png_debug(1, "in png_write_gAMA");
+
/* file_gamma is saved in 1/100,000ths */
igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
png_save_uint_32(buf, igamma);
@@ -716,6 +730,7 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
png_byte buf[4];
png_debug(1, "in png_write_gAMA");
+
/* file_gamma is saved in 1/100,000ths */
png_save_uint_32(buf, (png_uint_32)file_gamma);
png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
@@ -724,7 +739,7 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
#endif
#if defined(PNG_WRITE_sRGB_SUPPORTED)
-/* write a sRGB chunk */
+/* Write a sRGB chunk */
void /* PRIVATE */
png_write_sRGB(png_structp png_ptr, int srgb_intent)
{
@@ -734,6 +749,7 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent)
png_byte buf[1];
png_debug(1, "in png_write_sRGB");
+
if (srgb_intent >= PNG_sRGB_INTENT_LAST)
png_warning(png_ptr,
"Invalid sRGB rendering intent specified");
@@ -743,7 +759,7 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent)
#endif
#if defined(PNG_WRITE_iCCP_SUPPORTED)
-/* write an iCCP chunk */
+/* Write an iCCP chunk */
void /* PRIVATE */
png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
png_charp profile, int profile_len)
@@ -781,10 +797,19 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
((*( (png_bytep)profile + 2))<< 8) |
((*( (png_bytep)profile + 3)) );
+ if (embedded_profile_len < 0)
+ {
+ png_warning(png_ptr,
+ "Embedded profile length in iCCP chunk is negative");
+ png_free(png_ptr, new_name);
+ return;
+ }
+
if (profile_len < embedded_profile_len)
{
png_warning(png_ptr,
"Embedded profile length too large in iCCP chunk");
+ png_free(png_ptr, new_name);
return;
}
@@ -799,7 +824,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
profile_len = png_text_compress(png_ptr, profile,
(png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
- /* make sure we include the NULL after the name and the compression type */
+ /* Make sure we include the NULL after the name and the compression type */
png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
(png_uint_32)(name_len + profile_len + 2));
new_name[name_len + 1] = 0x00;
@@ -815,7 +840,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
#endif
#if defined(PNG_WRITE_sPLT_SUPPORTED)
-/* write a sPLT chunk */
+/* Write a sPLT chunk */
void /* PRIVATE */
png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
{
@@ -833,18 +858,18 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
#endif
png_debug(1, "in png_write_sPLT");
- if ((name_len = png_check_keyword(png_ptr,
- spalette->name, &new_name))==0)
- return;
- /* make sure we include the NULL after the name */
+ if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0)
+ return;
+
+ /* Make sure we include the NULL after the name */
png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
(png_uint_32)(name_len + 2 + palette_size));
png_write_chunk_data(png_ptr, (png_bytep)new_name,
(png_size_t)(name_len + 1));
png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, (png_size_t)1);
- /* loop through each palette entry, writing appropriately */
+ /* Loop through each palette entry, writing appropriately */
#ifndef PNG_NO_POINTER_INDEXING
for (ep = spalette->entries; ep<spalette->entries + spalette->nentries; ep++)
{
@@ -896,7 +921,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
#endif
#if defined(PNG_WRITE_sBIT_SUPPORTED)
-/* write the sBIT chunk */
+/* Write the sBIT chunk */
void /* PRIVATE */
png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
{
@@ -907,7 +932,8 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
png_size_t size;
png_debug(1, "in png_write_sBIT");
- /* make sure we don't depend upon the order of PNG_COLOR_8 */
+
+ /* Make sure we don't depend upon the order of PNG_COLOR_8 */
if (color_type & PNG_COLOR_MASK_COLOR)
{
png_byte maxbits;
@@ -952,7 +978,7 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
#endif
#if defined(PNG_WRITE_cHRM_SUPPORTED)
-/* write the cHRM chunk */
+/* Write the cHRM chunk */
#ifdef PNG_FLOATING_POINT_SUPPORTED
void /* PRIVATE */
png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
@@ -983,21 +1009,21 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
int_red_x, int_red_y, int_green_x, int_green_y, int_blue_x, int_blue_y))
#endif
{
- /* each value is saved in 1/100,000ths */
-
- png_save_uint_32(buf, int_white_x);
- png_save_uint_32(buf + 4, int_white_y);
+ /* Each value is saved in 1/100,000ths */
+
+ png_save_uint_32(buf, int_white_x);
+ png_save_uint_32(buf + 4, int_white_y);
- png_save_uint_32(buf + 8, int_red_x);
- png_save_uint_32(buf + 12, int_red_y);
+ png_save_uint_32(buf + 8, int_red_x);
+ png_save_uint_32(buf + 12, int_red_y);
- png_save_uint_32(buf + 16, int_green_x);
- png_save_uint_32(buf + 20, int_green_y);
+ png_save_uint_32(buf + 16, int_green_x);
+ png_save_uint_32(buf + 20, int_green_y);
- png_save_uint_32(buf + 24, int_blue_x);
- png_save_uint_32(buf + 28, int_blue_y);
+ png_save_uint_32(buf + 24, int_blue_x);
+ png_save_uint_32(buf + 28, int_blue_y);
- png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
+ png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
}
}
#endif
@@ -1014,32 +1040,33 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
png_byte buf[32];
png_debug(1, "in png_write_cHRM");
- /* each value is saved in 1/100,000ths */
+
+ /* Each value is saved in 1/100,000ths */
#if !defined(PNG_NO_CHECK_cHRM)
if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y,
green_x, green_y, blue_x, blue_y))
#endif
{
- png_save_uint_32(buf, (png_uint_32)white_x);
- png_save_uint_32(buf + 4, (png_uint_32)white_y);
+ png_save_uint_32(buf, (png_uint_32)white_x);
+ png_save_uint_32(buf + 4, (png_uint_32)white_y);
- png_save_uint_32(buf + 8, (png_uint_32)red_x);
- png_save_uint_32(buf + 12, (png_uint_32)red_y);
+ png_save_uint_32(buf + 8, (png_uint_32)red_x);
+ png_save_uint_32(buf + 12, (png_uint_32)red_y);
- png_save_uint_32(buf + 16, (png_uint_32)green_x);
- png_save_uint_32(buf + 20, (png_uint_32)green_y);
+ png_save_uint_32(buf + 16, (png_uint_32)green_x);
+ png_save_uint_32(buf + 20, (png_uint_32)green_y);
- png_save_uint_32(buf + 24, (png_uint_32)blue_x);
- png_save_uint_32(buf + 28, (png_uint_32)blue_y);
+ png_save_uint_32(buf + 24, (png_uint_32)blue_x);
+ png_save_uint_32(buf + 28, (png_uint_32)blue_y);
- png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
+ png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
}
}
#endif
#endif
#if defined(PNG_WRITE_tRNS_SUPPORTED)
-/* write the tRNS chunk */
+/* Write the tRNS chunk */
void /* PRIVATE */
png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
int num_trans, int color_type)
@@ -1050,6 +1077,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
png_byte buf[6];
png_debug(1, "in png_write_tRNS");
+
if (color_type == PNG_COLOR_TYPE_PALETTE)
{
if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette)
@@ -1057,13 +1085,13 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
png_warning(png_ptr, "Invalid number of transparent colors specified");
return;
}
- /* write the chunk out as it is */
+ /* Write the chunk out as it is */
png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans,
(png_size_t)num_trans);
}
else if (color_type == PNG_COLOR_TYPE_GRAY)
{
- /* one 16 bit value */
+ /* One 16 bit value */
if (tran->gray >= (1 << png_ptr->bit_depth))
{
png_warning(png_ptr,
@@ -1075,7 +1103,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
}
else if (color_type == PNG_COLOR_TYPE_RGB)
{
- /* three 16 bit values */
+ /* Three 16 bit values */
png_save_uint_16(buf, tran->red);
png_save_uint_16(buf + 2, tran->green);
png_save_uint_16(buf + 4, tran->blue);
@@ -1095,7 +1123,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
#endif
#if defined(PNG_WRITE_bKGD_SUPPORTED)
-/* write the background chunk */
+/* Write the background chunk */
void /* PRIVATE */
png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
{
@@ -1105,6 +1133,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
png_byte buf[6];
png_debug(1, "in png_write_bKGD");
+
if (color_type == PNG_COLOR_TYPE_PALETTE)
{
if (
@@ -1148,7 +1177,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
#endif
#if defined(PNG_WRITE_hIST_SUPPORTED)
-/* write the histogram */
+/* Write the histogram */
void /* PRIVATE */
png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
{
@@ -1159,6 +1188,7 @@ png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
png_byte buf[3];
png_debug(1, "in png_write_hIST");
+
if (num_hist > (int)png_ptr->num_palette)
{
png_debug2(3, "num_hist = %d, num_palette = %d", num_hist,
@@ -1199,6 +1229,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
int kwarn=0;
png_debug(1, "in png_check_keyword");
+
*new_key = NULL;
if (key == NULL || (key_len = png_strlen(key)) == 0)
@@ -1248,8 +1279,8 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
while (*kp == ' ')
{
- *(kp--) = '\0';
- key_len--;
+ *(kp--) = '\0';
+ key_len--;
}
}
@@ -1261,8 +1292,8 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
while (*kp == ' ')
{
- kp++;
- key_len--;
+ kp++;
+ key_len--;
}
}
@@ -1310,7 +1341,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
#endif
#if defined(PNG_WRITE_tEXt_SUPPORTED)
-/* write a tEXt chunk */
+/* Write a tEXt chunk */
void /* PRIVATE */
png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
png_size_t text_len)
@@ -1322,6 +1353,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
png_charp new_key;
png_debug(1, "in png_write_tEXt");
+
if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
return;
@@ -1330,7 +1362,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
else
text_len = png_strlen(text);
- /* make sure we include the 0 after the key */
+ /* Make sure we include the 0 after the key */
png_write_chunk_start(png_ptr, (png_bytep)png_tEXt,
(png_uint_32)(key_len + text_len + 1));
/*
@@ -1350,7 +1382,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
#endif
#if defined(PNG_WRITE_zTXt_SUPPORTED)
-/* write a compressed text chunk */
+/* Write a compressed text chunk */
void /* PRIVATE */
png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
png_size_t text_len, int compression)
@@ -1386,31 +1418,31 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
text_len = png_strlen(text);
- /* compute the compressed data; do it now for the length */
+ /* Compute the compressed data; do it now for the length */
text_len = png_text_compress(png_ptr, text, text_len, compression,
&comp);
- /* write start of chunk */
+ /* Write start of chunk */
png_write_chunk_start(png_ptr, (png_bytep)png_zTXt,
(png_uint_32)(key_len+text_len + 2));
- /* write key */
+ /* Write key */
png_write_chunk_data(png_ptr, (png_bytep)new_key,
(png_size_t)(key_len + 1));
png_free(png_ptr, new_key);
buf[0] = (png_byte)compression;
- /* write compression */
+ /* Write compression */
png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1);
- /* write the compressed data */
+ /* Write the compressed data */
png_write_compressed_data_out(png_ptr, &comp);
- /* close the chunk */
+ /* Close the chunk */
png_write_chunk_end(png_ptr);
}
#endif
#if defined(PNG_WRITE_iTXt_SUPPORTED)
-/* write an iTXt chunk */
+/* Write an iTXt chunk */
void /* PRIVATE */
png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
png_charp lang, png_charp lang_key, png_charp text)
@@ -1442,21 +1474,21 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
}
if (lang_key == NULL)
- lang_key_len = 0;
+ lang_key_len = 0;
else
- lang_key_len = png_strlen(lang_key);
+ lang_key_len = png_strlen(lang_key);
if (text == NULL)
text_len = 0;
else
- text_len = png_strlen(text);
+ text_len = png_strlen(text);
- /* compute the compressed data; do it now for the length */
+ /* Compute the compressed data; do it now for the length */
text_len = png_text_compress(png_ptr, text, text_len, compression-2,
&comp);
- /* make sure we include the compression flag, the compression byte,
+ /* Make sure we include the compression flag, the compression byte,
* and the NULs after the key, lang, and lang_key parts */
png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
@@ -1467,8 +1499,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
+ lang_key_len
+ text_len));
- /*
- * We leave it to the application to meet PNG-1.0 requirements on the
+ /* We leave it to the application to meet PNG-1.0 requirements on the
* contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
@@ -1476,13 +1507,13 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
png_write_chunk_data(png_ptr, (png_bytep)new_key,
(png_size_t)(key_len + 1));
- /* set the compression flag */
+ /* Set the compression flag */
if (compression == PNG_ITXT_COMPRESSION_NONE || \
compression == PNG_TEXT_COMPRESSION_NONE)
cbuf[0] = 0;
else /* compression == PNG_ITXT_COMPRESSION_zTXt */
cbuf[0] = 1;
- /* set the compression method */
+ /* Set the compression method */
cbuf[1] = 0;
png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
@@ -1500,7 +1531,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
#endif
#if defined(PNG_WRITE_oFFs_SUPPORTED)
-/* write the oFFs chunk */
+/* Write the oFFs chunk */
void /* PRIVATE */
png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
int unit_type)
@@ -1511,6 +1542,7 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
png_byte buf[9];
png_debug(1, "in png_write_oFFs");
+
if (unit_type >= PNG_OFFSET_LAST)
png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
@@ -1522,7 +1554,7 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
}
#endif
#if defined(PNG_WRITE_pCAL_SUPPORTED)
-/* write the pCAL chunk (described in the PNG extensions document) */
+/* Write the pCAL chunk (described in the PNG extensions document) */
void /* PRIVATE */
png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)
@@ -1537,6 +1569,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
int i;
png_debug1(1, "in png_write_pCAL (%d parameters)", nparams);
+
if (type >= PNG_EQUATION_LAST)
png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
@@ -1584,7 +1617,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
#endif
#if defined(PNG_WRITE_sCAL_SUPPORTED)
-/* write the sCAL chunk */
+/* Write the sCAL chunk */
#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO)
void /* PRIVATE */
png_write_sCAL(png_structp png_ptr, int unit, double width, double height)
@@ -1647,8 +1680,8 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
}
buf[0] = (png_byte)unit;
- png_memcpy(buf + 1, width, wlen + 1); /* append the '\0' here */
- png_memcpy(buf + wlen + 2, height, hlen); /* do NOT append the '\0' here */
+ png_memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */
+ png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len);
@@ -1658,7 +1691,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
#endif
#if defined(PNG_WRITE_pHYs_SUPPORTED)
-/* write the pHYs chunk */
+/* Write the pHYs chunk */
void /* PRIVATE */
png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
png_uint_32 y_pixels_per_unit,
@@ -1670,6 +1703,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
png_byte buf[9];
png_debug(1, "in png_write_pHYs");
+
if (unit_type >= PNG_RESOLUTION_LAST)
png_warning(png_ptr, "Unrecognized unit type for pHYs chunk");
@@ -1694,6 +1728,7 @@ png_write_tIME(png_structp png_ptr, png_timep mod_time)
png_byte buf[7];
png_debug(1, "in png_write_tIME");
+
if (mod_time->month > 12 || mod_time->month < 1 ||
mod_time->day > 31 || mod_time->day < 1 ||
mod_time->hour > 23 || mod_time->second > 60)
@@ -1713,24 +1748,24 @@ png_write_tIME(png_structp png_ptr, png_timep mod_time)
}
#endif
-/* initializes the row writing capability of libpng */
+/* Initializes the row writing capability of libpng */
void /* PRIVATE */
png_write_start_row(png_structp png_ptr)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
#ifdef PNG_USE_LOCAL_ARRAYS
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* start of interlace block */
+ /* Start of interlace block */
int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
- /* offset to next interlace block */
+ /* Offset to next interlace block */
int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
- /* start of interlace block in the y direction */
+ /* Start of interlace block in the y direction */
int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
- /* offset to next interlace block in the y direction */
+ /* Offset to next interlace block in the y direction */
int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
#endif
@@ -1738,16 +1773,17 @@ png_write_start_row(png_structp png_ptr)
png_size_t buf_size;
png_debug(1, "in png_write_start_row");
+
buf_size = (png_size_t)(PNG_ROWBYTES(
png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
- /* set up row buffer */
+ /* Set up row buffer */
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)buf_size);
png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
#ifndef PNG_NO_WRITE_FILTER
- /* set up filtering buffer, if using this filter */
+ /* Set up filtering buffer, if using this filter */
if (png_ptr->do_filter & PNG_FILTER_SUB)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
@@ -1758,10 +1794,10 @@ png_write_start_row(png_structp png_ptr)
/* We only need to keep the previous row if we are using one of these. */
if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
{
- /* set up previous row buffer */
- png_ptr->prev_row = (png_bytep)png_malloc(png_ptr,
+ /* Set up previous row buffer */
+ png_ptr->prev_row = (png_bytep)png_malloc(png_ptr,
(png_uint_32)buf_size);
- png_memset(png_ptr->prev_row, 0, buf_size);
+ png_memset(png_ptr->prev_row, 0, buf_size);
if (png_ptr->do_filter & PNG_FILTER_UP)
{
@@ -1787,7 +1823,7 @@ png_write_start_row(png_structp png_ptr)
#endif /* PNG_NO_WRITE_FILTER */
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* if interlaced, we need to set up width and height of pass */
+ /* If interlaced, we need to set up width and height of pass */
if (png_ptr->interlaced)
{
if (!(png_ptr->transformations & PNG_INTERLACE))
@@ -1819,18 +1855,18 @@ png_write_finish_row(png_structp png_ptr)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
#ifdef PNG_USE_LOCAL_ARRAYS
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* start of interlace block */
+ /* Start of interlace block */
int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
- /* offset to next interlace block */
+ /* Offset to next interlace block */
int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
- /* start of interlace block in the y direction */
+ /* Start of interlace block in the y direction */
int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
- /* offset to next interlace block in the y direction */
+ /* Offset to next interlace block in the y direction */
int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
#endif
@@ -1838,15 +1874,16 @@ png_write_finish_row(png_structp png_ptr)
int ret;
png_debug(1, "in png_write_finish_row");
- /* next row */
+
+ /* Next row */
png_ptr->row_number++;
- /* see if we are done */
+ /* See if we are done */
if (png_ptr->row_number < png_ptr->num_rows)
return;
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- /* if interlaced, go to next pass */
+ /* If interlaced, go to next pass */
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
@@ -1856,7 +1893,7 @@ png_write_finish_row(png_structp png_ptr)
}
else
{
- /* loop until we find a non-zero width or height pass */
+ /* Loop until we find a non-zero width or height pass */
do
{
png_ptr->pass++;
@@ -1876,7 +1913,7 @@ png_write_finish_row(png_structp png_ptr)
}
- /* reset the row above the image for the next pass */
+ /* Reset the row above the image for the next pass */
if (png_ptr->pass < 7)
{
if (png_ptr->prev_row != NULL)
@@ -1888,16 +1925,16 @@ png_write_finish_row(png_structp png_ptr)
}
#endif
- /* if we get here, we've just written the last row, so we need
+ /* If we get here, we've just written the last row, so we need
to flush the compressor */
do
{
- /* tell the compressor we are done */
+ /* Tell the compressor we are done */
ret = deflate(&png_ptr->zstream, Z_FINISH);
- /* check for an error */
+ /* Check for an error */
if (ret == Z_OK)
{
- /* check to see if we need more room */
+ /* Check to see if we need more room */
if (!(png_ptr->zstream.avail_out))
{
png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
@@ -1914,7 +1951,7 @@ png_write_finish_row(png_structp png_ptr)
}
} while (ret != Z_STREAM_END);
- /* write any extra space */
+ /* Write any extra space */
if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
{
png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size -
@@ -1937,24 +1974,25 @@ void /* PRIVATE */
png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
{
#ifdef PNG_USE_LOCAL_ARRAYS
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
- /* start of interlace block */
+ /* Start of interlace block */
int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
- /* offset to next interlace block */
+ /* Offset to next interlace block */
int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
#endif
png_debug(1, "in png_do_write_interlace");
- /* we don't have to do anything on the last pass (6) */
+
+ /* We don't have to do anything on the last pass (6) */
#if defined(PNG_USELESS_TESTS_SUPPORTED)
if (row != NULL && row_info != NULL && pass < 6)
#else
if (pass < 6)
#endif
{
- /* each pixel depth is handled separately */
+ /* Each pixel depth is handled separately */
switch (row_info->pixel_depth)
{
case 1:
@@ -2065,27 +2103,27 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
png_uint_32 row_width = row_info->width;
png_size_t pixel_bytes;
- /* start at the beginning */
+ /* Start at the beginning */
dp = row;
- /* find out how many bytes each pixel takes up */
+ /* Find out how many bytes each pixel takes up */
pixel_bytes = (row_info->pixel_depth >> 3);
- /* loop through the row, only looking at the pixels that
+ /* Loop through the row, only looking at the pixels that
matter */
for (i = png_pass_start[pass]; i < row_width;
i += png_pass_inc[pass])
{
- /* find out where the original pixel is */
+ /* Find out where the original pixel is */
sp = row + (png_size_t)i * pixel_bytes;
- /* move the pixel */
+ /* Move the pixel */
if (dp != sp)
png_memcpy(dp, sp, pixel_bytes);
- /* next pixel */
+ /* Next pixel */
dp += pixel_bytes;
}
break;
}
}
- /* set new row width */
+ /* Set new row width */
row_info->width = (row_info->width +
png_pass_inc[pass] - 1 -
png_pass_start[pass]) /
@@ -2113,12 +2151,13 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_uint_32 mins, bpp;
png_byte filter_to_do = png_ptr->do_filter;
png_uint_32 row_bytes = row_info->rowbytes;
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
int num_p_filters = (int)png_ptr->num_prev_filters;
-#endif
+#endif
png_debug(1, "in png_write_find_filter");
- /* find out how many bytes offset each pixel is */
+
+ /* Find out how many bytes offset each pixel is */
bpp = (row_info->pixel_depth + 7) >> 3;
prev_row = png_ptr->prev_row;
@@ -2205,9 +2244,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
mins = sum;
}
- /* sub filter */
+ /* Sub filter */
if (filter_to_do == PNG_FILTER_SUB)
- /* it's the only filter so no testing is needed */
+ /* It's the only filter so no testing is needed */
{
png_bytep rp, lp, dp;
png_uint_32 i;
@@ -2322,7 +2361,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
}
}
- /* up filter */
+ /* Up filter */
if (filter_to_do == PNG_FILTER_UP)
{
png_bytep rp, dp, pp;
@@ -2425,7 +2464,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
}
}
- /* avg filter */
+ /* Avg filter */
if (filter_to_do == PNG_FILTER_AVG)
{
png_bytep rp, dp, pp, lp;
@@ -2727,19 +2766,20 @@ void /* PRIVATE */
png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
{
png_debug(1, "in png_write_filtered_row");
+
png_debug1(2, "filter = %d", filtered_row[0]);
- /* set up the zlib input buffer */
+ /* Set up the zlib input buffer */
png_ptr->zstream.next_in = filtered_row;
png_ptr->zstream.avail_in = (uInt)png_ptr->row_info.rowbytes + 1;
- /* repeat until we have compressed all the data */
+ /* Repeat until we have compressed all the data */
do
{
- int ret; /* return of zlib */
+ int ret; /* Return of zlib */
- /* compress the data */
+ /* Compress the data */
ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
- /* check for compression errors */
+ /* Check for compression errors */
if (ret != Z_OK)
{
if (png_ptr->zstream.msg != NULL)
@@ -2748,18 +2788,18 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
png_error(png_ptr, "zlib error");
}
- /* see if it is time to write another IDAT */
+ /* See if it is time to write another IDAT */
if (!(png_ptr->zstream.avail_out))
{
- /* write the IDAT and reset the zlib output buffer */
+ /* Write the IDAT and reset the zlib output buffer */
png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
- /* repeat until all data has been compressed */
+ /* Repeat until all data has been compressed */
} while (png_ptr->zstream.avail_in);
- /* swap the current and previous rows */
+ /* Swap the current and previous rows */
if (png_ptr->prev_row != NULL)
{
png_bytep tptr;
@@ -2769,7 +2809,7 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
png_ptr->row_buf = tptr;
}
- /* finish row - updates counters and flushes zlib if last row */
+ /* Finish row - updates counters and flushes zlib if last row */
png_write_finish_row(png_ptr);
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-08 09:55:09 +0000