diff options
| author | Manolo Gouy <Manolo> | 2010-06-07 13:39:03 +0000 |
|---|---|---|
| committer | Manolo Gouy <Manolo> | 2010-06-07 13:39:03 +0000 |
| commit | da5042584abf40bec2e31154feaadfab29f070c7 (patch) | |
| tree | da306fbd2f7321cacdbde75138c8436ee46bb7c1 /src/ps_image.cxx | |
| parent | 9416e3480aea607becc2e0576b606552fd42cca6 (diff) | |
Fix image bug reported by Csaba in r7626 + fix regression in ps_image.cxx
inadvertently brought in by r7617.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7634 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Diffstat (limited to 'src/ps_image.cxx')
| -rw-r--r-- | src/ps_image.cxx | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/src/ps_image.cxx b/src/ps_image.cxx index fa4a6fe2c..51646efa6 100644 --- a/src/ps_image.cxx +++ b/src/ps_image.cxx @@ -20,7 +20,9 @@ // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA. // -// Please report all bugs and problems to "fltk-bugs@fltk.org". +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php // #ifndef FL_DOXYGEN @@ -182,20 +184,12 @@ int Fl_PostScript_Graphics_Driver::alpha_mask(const uchar * data, int w, int h, return 0; } +// bitwise inversion of all 4-bit quantities +static const unsigned char swapped[16] = {0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15}; - -// TODO: anybody has more efficient algoritm? -static inline uchar swap_byte(const uchar i){ - uchar b =0; - if(i & 1) b |= 128; - if(i & 2) b |= 64; - if(i & 4) b |= 32; - if(i & 8) b |= 16; - if(i & 16) b |= 8; - if(i & 32) b |= 4; - if(i & 64) b |= 2; - if(i & 128) b |= 1; - return b; +// bitwise inversion of a byte +static inline uchar swap_byte(const uchar b) { + return (swapped[b & 0xF] << 4) | swapped[b >> 4]; } |