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windowscodecs: Ask libpng to ignore CRC of PNG chunks. 

According to my tests with manually created PNG images WIC ignores CRC errors
for both critical and ancillary chunks.
oldstable
Dmitry Timoshkov 2013-03-07 15:26:13 +09:00 committed by Alexandre Julliard
parent e86619413e
commit ec22949874
1 changed files with 3 additions and 0 deletions
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3
dlls/windowscodecs/pngformat.c
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@ -174,6 +174,7 @@ MAKE_FUNCPTR(png_get_pHYs);
MAKE_FUNCPTR(png_get_PLTE);
MAKE_FUNCPTR(png_get_tRNS);
MAKE_FUNCPTR(png_set_bgr);
MAKE_FUNCPTR(png_set_crc_action);
MAKE_FUNCPTR(png_set_error_fn);
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
MAKE_FUNCPTR(png_set_expand_gray_1_2_4_to_8);
@ -222,6 +223,7 @@ static void *load_libpng(void)
LOAD_FUNCPTR(png_get_PLTE);
LOAD_FUNCPTR(png_get_tRNS);
LOAD_FUNCPTR(png_set_bgr);
LOAD_FUNCPTR(png_set_crc_action);
LOAD_FUNCPTR(png_set_error_fn);
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
LOAD_FUNCPTR(png_set_expand_gray_1_2_4_to_8);
@ -438,6 +440,7 @@ static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
goto end;
}
ppng_set_error_fn(This->png_ptr, jmpbuf, user_error_fn, user_warning_fn);
ppng_set_crc_action(This->png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
/* seek to the start of the stream */
seek.QuadPart = 0;