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windowscodecs: Ask libpng to ignore CRC of PNG chunks.

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According to my tests with manually created PNG images WIC ignores CRC errors
for both critical and ancillary chunks.
This commit is contained in:
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;