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Diffstat (limited to 'png/libpng-manual.txt')
| -rw-r--r-- | png/libpng-manual.txt | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/png/libpng-manual.txt b/png/libpng-manual.txt index 2ce366d67..6c07e1022 100644 --- a/png/libpng-manual.txt +++ b/png/libpng-manual.txt @@ -1,6 +1,6 @@ libpng-manual.txt - A description on how to use and modify libpng - Copyright (c) 2018-2024 Cosmin Truta + Copyright (c) 2018-2025 Cosmin Truta Copyright (c) 1998-2018 Glenn Randers-Pehrson This document is released under the libpng license. @@ -9,9 +9,9 @@ libpng-manual.txt - A description on how to use and modify libpng Based on: - libpng version 1.6.36, December 2018, through 1.6.44 - September 2024 + libpng version 1.6.36, December 2018, through 1.6.50 - July 2025 Updated and distributed by Cosmin Truta - Copyright (c) 2018-2024 Cosmin Truta + Copyright (c) 2018-2025 Cosmin Truta libpng versions 0.97, January 1998, through 1.6.35 - July 2018 Updated and distributed by Glenn Randers-Pehrson @@ -65,18 +65,22 @@ Libpng was written as a companion to the PNG specification, as a way of reducing the amount of time and effort it takes to support the PNG file format in application programs. -The PNG specification (second edition), November 2003, is available as +The PNG specification (Third Edition), June 2025, is available as +a W3C Recommendation at +<https://www.w3.org/TR/2025/REC-png-3-20250624/>. + +The PNG specification (Second Edition), November 2003, is available as a W3C Recommendation and as an ISO Standard (ISO/IEC 15948:2004 (E)) at <https://www.w3.org/TR/2003/REC-PNG-20031110/>. The W3C and ISO documents have identical technical content. The PNG-1.2 specification is available at -<https://png-mng.sourceforge.io/pub/png/spec/1.2/>. -It is technically equivalent -to the PNG specification (second edition) but has some additional material. +<https://www.libpng.org/pub/png/spec/1.2/>. +It is technically equivalent to the PNG specification (Second Edition) +but has some additional material. The PNG-1.0 specification is available as RFC 2083 at -<https://png-mng.sourceforge.io/pub/png/spec/1.0/> and as a +<https://www.libpng.org/pub/png/spec/1.0/> and as a W3C Recommendation at <https://www.w3.org/TR/REC-png-961001>. Some additional chunks are described in the special-purpose public chunks @@ -4089,7 +4093,7 @@ READ APIs is filled in from the PNG header in the file. int png_image_begin_read_from_stdio (png_imagep image, - FILE* file) + FILE *file) The PNG header is read from the stdio FILE object. @@ -4164,7 +4168,7 @@ be written: int convert_to_8_bit, const void *buffer, png_int_32 row_stride, const void *colormap) - Write the image to the given (FILE*). + Write the image to the given FILE object. With all write APIs if image is in one of the linear formats with (png_uint_16) data then setting convert_to_8_bit will cause the output to be @@ -5173,7 +5177,7 @@ a pre-existing bug where the per-chunk 'keep' setting is ignored, and makes it possible to skip IDAT chunks in the sequential reader. The machine-generated configure files are no longer included in branches -libpng16 and later of the GIT repository. They continue to be included +libpng17 and later of the GIT repository. They continue to be included in the tarball releases, however. Libpng-1.6.0 through 1.6.2 used the CMF bytes at the beginning of the IDAT |