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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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4
pngwutil.c
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@@ -2006,7 +2006,7 @@ png_write_start_row(png_structrp png_ptr)
#endif
png_alloc_size_t buf_size;
int usr_pixel_depth;
unsigned int usr_pixel_depth;
png_debug(1, "in png_write_start_row");
@@ -2018,7 +2018,7 @@ png_write_start_row(png_structrp png_ptr)
/* 1.5.6: added to allow checking in the row write code. */
png_ptr->transformed_pixel_depth = png_ptr->pixel_depth;
png_ptr->maximum_pixel_depth = png_check_byte(png_ptr, usr_pixel_depth);
png_ptr->maximum_pixel_depth = usr_pixel_depth;
/* Set up row buffer */
png_ptr->row_buf = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size));