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windowscodecs: Calculate transparent color index for global GIF palette.

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This commit is contained in:
Dmitry Timoshkov 2012-09-24 13:23:18 +09:00 committed by Alexandre Julliard
parent 3eb499556e
commit a457978489
2 changed files with 20 additions and 5 deletions
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22
dlls/windowscodecs/gifformat.c
View File

@ -582,6 +582,7 @@ typedef struct {
LONG ref;
BOOL initialized;
GifFileType *gif;
UINT current_frame;
CRITICAL_SECTION lock;
} GifDecoder;
@ -1170,7 +1171,8 @@ static HRESULT WINAPI GifDecoder_CopyPalette(IWICBitmapDecoder *iface, IWICPalet
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
WICColor colors[256];
ColorMapObject *cm;
int i;
int i, trans;
ExtensionBlock *eb;
TRACE("(%p,%p)\n", iface, palette);
@ -1191,7 +1193,21 @@ static HRESULT WINAPI GifDecoder_CopyPalette(IWICBitmapDecoder *iface, IWICPalet
cm->Colors[i].Blue;
}
/* FIXME: transparent color? */
/* look for the transparent color extension */
for (i = 0; i < This->gif->SavedImages[This->current_frame].Extensions.ExtensionBlockCount; i++)
{
eb = This->gif->SavedImages[This->current_frame].Extensions.ExtensionBlocks + i;
if (eb->Function == GRAPHICS_EXT_FUNC_CODE && eb->ByteCount == 8)
{
if (eb->Bytes[3] & 1)
{
trans = (unsigned char)eb->Bytes[6];
colors[trans] &= 0xffffff; /* set alpha to 0 */
break;
}
}
}
return IWICPalette_InitializeCustom(palette, colors, cm->ColorCount);
}
@ -1258,6 +1274,7 @@ static HRESULT WINAPI GifDecoder_GetFrame(IWICBitmapDecoder *iface,
result->frame = &This->gif->SavedImages[index];
IWICBitmapDecoder_AddRef(iface);
result->parent = This;
This->current_frame = index;
*ppIBitmapFrame = &result->IWICBitmapFrameDecode_iface;
@ -1396,6 +1413,7 @@ HRESULT GifDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->ref = 1;
This->initialized = FALSE;
This->gif = NULL;
This->current_frame = 0;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": GifDecoder.lock");

3
dlls/windowscodecs/tests/gifformat.c
View File

@ -127,7 +127,6 @@ static void test_global_gif_palette(void)
ok(hr == S_OK, "GetColors error %#x\n", hr);
ok(ret == count, "expected %u, got %u\n", count, ret);
ok(color[0] == 0xff010203, "expected 0xff010203, got %#x\n", color[0]);
todo_wine
ok(color[1] == 0x00040506, "expected 0x00040506, got %#x\n", color[1]);
ok(color[2] == 0xff070809, "expected 0xff070809, got %#x\n", color[2]);
ok(color[3] == 0xff0a0b0c, "expected 0xff0a0b0c, got %#x\n", color[3]);
@ -193,7 +192,6 @@ static void test_global_gif_palette_2frames(void)
ok(hr == S_OK, "GetColors error %#x\n", hr);
ok(ret == count, "expected %u, got %u\n", count, ret);
ok(color[0] == 0xff010203, "expected 0xff010203, got %#x\n", color[0]);
todo_wine
ok(color[1] == 0x00040506, "expected 0x00040506, got %#x\n", color[1]);
ok(color[2] == 0xff070809, "expected 0xff070809, got %#x\n", color[2]);
ok(color[3] == 0xff0a0b0c, "expected 0xff0a0b0c, got %#x\n", color[3]);
@ -238,7 +236,6 @@ todo_wine
ok(ret == count, "expected %u, got %u\n", count, ret);
ok(color[0] == 0xff010203, "expected 0xff010203, got %#x\n", color[0]);
ok(color[1] == 0xff040506 || broken(color[1] == 0x00040506) /* XP */, "expected 0xff040506, got %#x\n", color[1]);
todo_wine
ok(color[2] == 0x00070809 || broken(color[2] == 0xff070809) /* XP */, "expected 0x00070809, got %#x\n", color[2]);
ok(color[3] == 0xff0a0b0c, "expected 0xff0a0b0c, got %#x\n", color[3]);