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[master] Check for up->location !PNG_AFTER_IDAT when writing unknown chunks

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before IDAT.
This commit is contained in:
Glenn Randers-Pehrson
2011-06-03 21:16:45 -05:00
parent 9dad5e37ae
commit 5a5ad7a5fa
3 changed files with 6 additions and 1 deletions
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3
pngwrite.c
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@@ -295,6 +295,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && (up->location & PNG_HAVE_PLTE) &&
!(up->location & PNG_HAVE_IDAT) &&
!(up->location & PNG_AFTER_IDAT) &&
((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
(png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
{
@@ -1411,7 +1412,7 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
#endif
#ifdef PNG_WRITE_FILLER_SUPPORTED
/* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
/* Pack XRGB/RGBX/ARGB/RGBA into RGB (4 channels -> 3 channels) */
if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)