windowscodecs: Use predefined WICBitmapPaletteTypeFixedGray16 palette instead of a handmade one.
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@ -82,16 +82,6 @@ static inline FormatConverter *impl_from_IWICFormatConverter(IWICFormatConverter
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return CONTAINING_RECORD(iface, FormatConverter, IWICFormatConverter_iface);
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}
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static void make_grayscale_palette(WICColor *colors, UINT num_colors)
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{
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int i, v;
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for (i=0; i<num_colors; i++)
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{
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v = i * 255 / (num_colors-1);
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colors[i] = 0xff000000 | v<<16 | v<<8 | v;
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}
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}
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static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRect *prc,
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UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer, enum pixelformat source_format)
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{
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@ -248,21 +238,19 @@ static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRe
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IWICPalette *palette;
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UINT actualcolors;
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if (source_format == format_4bppIndexed)
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{
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res = PaletteImpl_Create(&palette);
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if (FAILED(res)) return res;
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if (source_format == format_4bppIndexed)
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res = IWICBitmapSource_CopyPalette(This->source, palette);
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else
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res = IWICPalette_InitializePredefined(palette, WICBitmapPaletteTypeFixedGray16, FALSE);
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if (SUCCEEDED(res))
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res = IWICPalette_GetColors(palette, 16, colors, &actualcolors);
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IWICPalette_Release(palette);
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if (FAILED(res)) return res;
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}
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else
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make_grayscale_palette(colors, 16);
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srcstride = (prc->Width+1)/2;
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srcdatasize = srcstride * prc->Height;
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