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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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7
pngwrite.c
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@@ -882,7 +882,12 @@ png_write_row(png_structrp png_ptr, png_const_bytep row)
/* Check for out-of-range palette index */
if (row_info.color_type == PNG_COLOR_TYPE_PALETTE &&
png_ptr->num_palette_max >= 0)
png_do_check_palette_indexes(png_ptr, &row_info);
{
png_transform_control display;
png_init_transform_control(png_ptr, &display, &row_info);
png_do_check_palette_indexes(png_ptr, &display);
}
#endif
/* Find a filter if necessary, filter the row and write it out. */