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[legacy] 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
2011-06-07 15:35:48 -05:00
parent 950f965bca
commit d13542a3ee
3 changed files with 5 additions and 0 deletions
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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)))
{