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Bill Skaggs <weskaggs@primate.ucdavis.edu>

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* plug-ins/common/png.c: fix remapping of colors when
	saving IndexedA images; fixes bug #303864.
This commit is contained in:
William Skaggs 2006-05-22 17:13:30 +00:00
parent 534fedbdd7
commit 5e81a4a012
2 changed files with 13 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2006-05-212 Bill Skaggs <weskaggs@primate.ucdavis.edu>
* plug-ins/common/png.c: fix remapping of colors when
saving IndexedA images; fixes bug #303864.
2006-05-22 Sven Neumann <sven@gimp.org>
* app/actions/plug-in-commands.c (plug_in_collect_image_args):

10
plug-ins/common/png.c
View file

@ -1480,13 +1480,18 @@ save_image (const gchar *filename,
* transparency set, write out the remapped palette */
if (info->valid & PNG_INFO_tRNS)
{
guchar inverse_remap[256];
for (i = 0; i < 256; i++)
inverse_remap[ remap[i] ] = i;
for (i = 0; i < num; ++i)
{
fixed = pixels[i];
for (k = 0; k < drawable->width; ++k)
{
fixed[k] = (fixed[k*2+1] > 127) ?
remap[fixed[k*2]] :
inverse_remap[ fixed[k*2] ] :
0;
}
}
@ -1613,7 +1618,8 @@ respin_cmap (png_structp pp,
* due to png_set_tRNS() */
remap[0] = transparent;
remap[transparent] = 0;
for (i = 1; i <= transparent; i++)
remap[i] = i - 1;
/* Copy from index 0 to index transparent - 1 to index 1 to
* transparent of after, then from transparent+1 to colors-1