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windowscodecs: Fix 32bppGrayFloat to 8bppGray conversion.

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Based on Dmitry Timoshkov's patch.

Signed-off-by: Vincent Povirk <vincent@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Vincent Povirk 2017-08-14 14:58:59 -05:00 committed by Alexandre Julliard
parent d71bc1503b
commit 8bae21302f
2 changed files with 38 additions and 0 deletions
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37
dlls/windowscodecs/converter.c
View file

@ -1149,6 +1149,43 @@ static HRESULT copypixels_to_8bppGray(struct FormatConverter *This, const WICRec
return S_OK;
}
if (source_format == format_32bppGrayFloat)
{
hr = S_OK;
if (prc)
{
srcstride = 4 * prc->Width;
srcdatasize = srcstride * prc->Height;
srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
if (!srcdata) return E_OUTOFMEMORY;
hr = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
if (SUCCEEDED(hr))
{
INT x, y;
BYTE *src = srcdata, *dst = pbBuffer;
for (y=0; y < prc->Height; y++)
{
float *srcpixel = (float*)src;
BYTE *dstpixel = dst;
for (x=0; x < prc->Width; x++)
*dstpixel++ = (BYTE)floorf(to_sRGB_component(*srcpixel++) * 255.0f + 0.51f);
src += srcstride;
dst += cbStride;
}
}
HeapFree(GetProcessHeap(), 0, srcdata);
}
return hr;
}
srcstride = 3 * prc->Width;
srcdatasize = srcstride * prc->Height;

1
dlls/windowscodecs/tests/converter.c
View file

@ -880,6 +880,7 @@ START_TEST(converter)
test_conversion(&testdata_24bppBGR, &testdata_8bppGray, "24bppBGR -> 8bppGray", FALSE);
test_conversion(&testdata_32bppBGR, &testdata_8bppGray, "32bppBGR -> 8bppGray", FALSE);
test_conversion(&testdata_32bppGrayFloat, &testdata_24bppBGR_gray, "32bppGrayFloat -> 24bppBGR gray", FALSE);
test_conversion(&testdata_32bppGrayFloat, &testdata_8bppGray, "32bppGrayFloat -> 8bppGray", FALSE);
test_invalid_conversion();
test_default_converter();