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[libpng17] Transformed rewrite: changed row_info, added checks. This introduces an

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internal struct (png_transform_control) to replace row_info and uses
    that to implement affirms correctly.  The change also adds checks on
    the rowbytes calculation and additional checks on most transform
    implementations.
Added png_uint_16 range checking, pngvalid tRNS, fixed png_uint_16:
    review of previous checks, removal of some where SAFE. pngvalid: add
    testing of tRNS for better code coverage pngvalid: correct rgb-to-gray
    error calculations. Code coverage is still incomplete: see /*UNTESTED*/
    in pngrtran.c
This commit is contained in:
John Bowler
2015-03-30 21:32:41 -05:00
committed by Glenn Randers-Pehrson
parent 73ea393ab2
commit 673ae608ab
14 changed files with 1812 additions and 1451 deletions
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3
pngread.c
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@@ -948,15 +948,12 @@ png_read_destroy(png_structrp png_ptr)
}
png_ptr->free_me &= ~PNG_FREE_PLTE;
#if defined(PNG_tRNS_SUPPORTED) || \
defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
if ((png_ptr->free_me & PNG_FREE_TRNS) != 0)
{
png_free(png_ptr, png_ptr->trans_alpha);
png_ptr->trans_alpha = NULL;
}
png_ptr->free_me &= ~PNG_FREE_TRNS;
#endif
inflateEnd(&png_ptr->zstream);