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gdiplus: Retrieve image palette from WIC.

This commit is contained in:
Dmitry Timoshkov 2012-07-18 17:24:58 +09:00 committed by Alexandre Julliard
parent 894d161891
commit dce93479ea
1 changed files with 53 additions and 2 deletions
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55
dlls/gdiplus/image.c
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2007 Google (Evan Stade)
* Copyright (C) 2012 Dmitry Timoshkov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -41,6 +42,46 @@ WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
#define PIXELFORMATBPP(x) ((x) ? ((x) >> 8) & 255 : 24)
static ColorPalette *get_palette(IWICBitmapFrameDecode *frame)
{
HRESULT hr;
IWICImagingFactory *factory;
IWICPalette *wic_palette;
ColorPalette *palette = NULL;
hr = CoCreateInstance(&CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER,
&IID_IWICImagingFactory, (void **)&factory);
if (hr != S_OK) return NULL;
hr = IWICImagingFactory_CreatePalette(factory, &wic_palette);
if (hr == S_OK)
{
hr = IWICBitmapFrameDecode_CopyPalette(frame, wic_palette);
if (hr == S_OK)
{
UINT count;
BOOL mono, gray;
IWICPalette_IsBlackWhite(wic_palette, &mono);
IWICPalette_IsGrayscale(wic_palette, &gray);
IWICPalette_GetColorCount(wic_palette, &count);
palette = HeapAlloc(GetProcessHeap(), 0, 2 * sizeof(UINT) + count * sizeof(ARGB));
IWICPalette_GetColors(wic_palette, count, palette->Entries, &palette->Count);
if (mono)
palette->Flags = 0;
else if (gray)
palette->Flags = PaletteFlagsGrayScale;
else
palette->Flags = PaletteFlagsHalftone;
}
IWICPalette_Release(wic_palette);
}
IWICImagingFactory_Release(factory);
return palette;
}
static INT ipicture_pixel_height(IPicture *pic)
{
HDC hdcref;
@ -2994,6 +3035,7 @@ static GpStatus decode_image_wic(IStream* stream, REFCLSID clsid, UINT active_fr
IWICMetadataBlockReader *block_reader;
WICPixelFormatGUID wic_format;
PixelFormat gdip_format=0;
ColorPalette *palette = NULL;
int i;
UINT width, height, frame_count;
BitmapData lockeddata;
@ -3102,6 +3144,7 @@ static GpStatus decode_image_wic(IStream* stream, REFCLSID clsid, UINT active_fr
IWICMetadataBlockReader_Release(block_reader);
}
palette = get_palette(frame);
IWICBitmapFrameDecode_Release(frame);
}
@ -3119,8 +3162,16 @@ end:
bitmap->image.frame_count = frame_count;
bitmap->image.current_frame = active_frame;
bitmap->image.stream = stream;
if (IsEqualGUID(&wic_format, &GUID_WICPixelFormatBlackWhite))
bitmap->image.palette->Flags = 0;
if (palette)
{
GdipFree(bitmap->image.palette);
bitmap->image.palette = palette;
}
else
{
if (IsEqualGUID(&wic_format, &GUID_WICPixelFormatBlackWhite))
bitmap->image.palette->Flags = 0;
}
/* Pin the source stream */
IStream_AddRef(stream);
}