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gdiplus: Add GIF transparent index to the image properties.

This commit is contained in:
Dmitry Timoshkov 2012-09-25 12:54:01 +09:00 committed by Alexandre Julliard
parent a950a0549f
commit 54edca19e1
1 changed files with 73 additions and 0 deletions
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73
dlls/gdiplus/image.c
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@ -3144,6 +3144,33 @@ static void add_property(GpBitmap *bitmap, PropertyItem *item)
bitmap->prop_count++;
}
static BOOL get_bool_property(IWICMetadataReader *reader, const GUID *guid, const WCHAR *prop_name)
{
HRESULT hr;
GUID format;
PROPVARIANT id, value;
BOOL ret = FALSE;
IWICMetadataReader_GetMetadataFormat(reader, &format);
if (!IsEqualGUID(&format, guid)) return FALSE;
PropVariantInit(&id);
PropVariantInit(&value);
id.vt = VT_LPWSTR;
id.u.pwszVal = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(prop_name) + 1) * sizeof(WCHAR));
if (!id.u.pwszVal) return FALSE;
lstrcpyW(id.u.pwszVal, prop_name);
hr = IWICMetadataReader_GetValue(reader, NULL, &id, &value);
if (hr == S_OK && value.vt == VT_BOOL)
ret = value.u.boolVal;
PropVariantClear(&id);
PropVariantClear(&value);
return ret;
}
static PropertyItem *get_property(IWICMetadataReader *reader, const GUID *guid, const WCHAR *prop_name)
{
HRESULT hr;
@ -3207,6 +3234,21 @@ static PropertyItem *get_gif_background(IWICMetadataReader *reader)
return background;
}
static PropertyItem *get_gif_transparent_idx(IWICMetadataReader *reader)
{
static const WCHAR transparency_flagW[] = { 'T','r','a','n','s','p','a','r','e','n','c','y','F','l','a','g',0 };
static const WCHAR colorW[] = { 'T','r','a','n','s','p','a','r','e','n','t','C','o','l','o','r','I','n','d','e','x',0 };
PropertyItem *index = NULL;
if (get_bool_property(reader, &GUID_MetadataFormatGCE, transparency_flagW))
{
index = get_property(reader, &GUID_MetadataFormatGCE, colorW);
if (index)
index->id = PropertyTagIndexTransparent;
}
return index;
}
static LONG get_gif_frame_delay(IWICBitmapFrameDecode *frame)
{
static const WCHAR delayW[] = { 'D','e','l','a','y',0 };
@ -3254,6 +3296,7 @@ static void gif_metadata_reader(GpBitmap *bitmap, IWICBitmapDecoder *decoder, UI
IWICMetadataReader *reader;
UINT frame_count, block_count, i;
PropertyItem *delay = NULL, *comment = NULL, *background = NULL;
PropertyItem *transparent_idx = NULL;
IWICBitmapDecoder_GetFrameCount(decoder, &frame_count);
if (frame_count > 1)
@ -3314,6 +3357,36 @@ static void gif_metadata_reader(GpBitmap *bitmap, IWICBitmapDecoder *decoder, UI
GdipFree(delay);
GdipFree(comment);
GdipFree(background);
/* Win7 gdiplus always returns transparent color index from frame 0 */
hr = IWICBitmapDecoder_GetFrame(decoder, 0, &frame);
if (hr != S_OK) return;
hr = IWICBitmapFrameDecode_QueryInterface(frame, &IID_IWICMetadataBlockReader, (void **)&block_reader);
if (hr == S_OK)
{
hr = IWICMetadataBlockReader_GetCount(block_reader, &block_count);
if (hr == S_OK)
{
for (i = 0; i < block_count; i++)
{
hr = IWICMetadataBlockReader_GetReaderByIndex(block_reader, i, &reader);
if (hr == S_OK)
{
if (!transparent_idx)
transparent_idx = get_gif_transparent_idx(reader);
IWICMetadataReader_Release(reader);
}
}
}
IWICMetadataBlockReader_Release(block_reader);
}
if (transparent_idx) add_property(bitmap, transparent_idx);
GdipFree(transparent_idx);
IWICBitmapFrameDecode_Release(frame);
}
typedef void (*metadata_reader_func)(GpBitmap *bitmap, IWICBitmapDecoder *decoder, UINT frame);