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windowscodecs: Create Logical Screen Descriptor metadata for the GIF decoder.

This commit is contained in:
Dmitry Timoshkov 2012-09-12 15:09:09 +09:00 committed by Alexandre Julliard
parent 039f6d5114
commit 5373f8520d
2 changed files with 136 additions and 2 deletions
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136
dlls/windowscodecs/gifformat.c
View File

@ -1,5 +1,6 @@
/*
* Copyright 2009 Vincent Povirk for CodeWeavers
* Copyright 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
@ -322,8 +323,28 @@ HRESULT GCEReader_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void **ppv)
return MetadataReader_Create(&GCEReader_Vtbl, pUnkOuter, iid, ppv);
}
static IStream *create_stream(const void *data, int data_size)
{
HRESULT hr;
IStream *stream;
HGLOBAL hdata;
void *locked_data;
hdata = GlobalAlloc(GMEM_MOVEABLE, data_size);
if (!hdata) return NULL;
locked_data = GlobalLock(hdata);
memcpy(locked_data, data, data_size);
GlobalUnlock(hdata);
hr = CreateStreamOnHGlobal(hdata, TRUE, &stream);
return FAILED(hr) ? NULL : stream;
}
typedef struct {
IWICBitmapDecoder IWICBitmapDecoder_iface;
IWICMetadataBlockReader IWICMetadataBlockReader_iface;
BYTE LSD_data[13]; /* Logical Screen Descriptor */
LONG ref;
BOOL initialized;
GifFileType *gif;
@ -342,6 +363,11 @@ static inline GifDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
return CONTAINING_RECORD(iface, GifDecoder, IWICBitmapDecoder_iface);
}
static inline GifDecoder *impl_from_IWICMetadataBlockReader(IWICMetadataBlockReader *iface)
{
return CONTAINING_RECORD(iface, GifDecoder, IWICMetadataBlockReader_iface);
}
static inline GifFrameDecode *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, GifFrameDecode, IWICBitmapFrameDecode_iface);
@ -591,6 +617,10 @@ static HRESULT WINAPI GifDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID
{
*ppv = &This->IWICBitmapDecoder_iface;
}
else if (IsEqualIID(&IID_IWICMetadataBlockReader, iid))
{
*ppv = &This->IWICMetadataBlockReader_iface;
}
else
{
*ppv = NULL;
@ -692,6 +722,10 @@ static HRESULT WINAPI GifDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
/* make sure we don't use the stream after this method returns */
This->gif->UserData = NULL;
seek.QuadPart = 0;
IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
IStream_Read(pIStream, &This->LSD_data, sizeof(This->LSD_data), NULL);
This->initialized = TRUE;
LeaveCriticalSection(&This->lock);
@ -817,6 +851,107 @@ static const IWICBitmapDecoderVtbl GifDecoder_Vtbl = {
GifDecoder_GetFrame
};
static HRESULT WINAPI GifDecoder_Block_QueryInterface(IWICMetadataBlockReader *iface,
REFIID iid, void **ppv)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
}
static ULONG WINAPI GifDecoder_Block_AddRef(IWICMetadataBlockReader *iface)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
}
static ULONG WINAPI GifDecoder_Block_Release(IWICMetadataBlockReader *iface)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
}
static HRESULT WINAPI GifDecoder_Block_GetContainerFormat(IWICMetadataBlockReader *iface,
GUID *guid)
{
TRACE("(%p,%p)\n", iface, guid);
if (!guid) return E_INVALIDARG;
*guid = GUID_ContainerFormatGif;
return S_OK;
}
static HRESULT WINAPI GifDecoder_Block_GetCount(IWICMetadataBlockReader *iface,
UINT *count)
{
TRACE("%p,%p\n", iface, count);
if (!count) return E_INVALIDARG;
*count = 1;
return S_OK;
}
static HRESULT create_LSD_metadata_reader(GifDecoder *This, IWICMetadataReader **reader)
{
HRESULT hr;
IWICMetadataReader *metadata_reader;
IWICPersistStream *persist;
IStream *stream;
/* FIXME: Use IWICComponentFactory_CreateMetadataReader once it's implemented */
hr = CoCreateInstance(&CLSID_WICLSDMetadataReader, NULL, CLSCTX_INPROC_SERVER,
&IID_IWICMetadataReader, (void **)&metadata_reader);
if (FAILED(hr)) return hr;
hr = IWICMetadataReader_QueryInterface(metadata_reader, &IID_IWICPersistStream, (void **)&persist);
if (FAILED(hr))
{
IWICMetadataReader_Release(metadata_reader);
return hr;
}
stream = create_stream(This->LSD_data, sizeof(This->LSD_data));
IWICPersistStream_LoadEx(persist, stream, NULL, WICPersistOptionsDefault);
IStream_Release(stream);
IWICPersistStream_Release(persist);
*reader = metadata_reader;
return S_OK;
}
static HRESULT WINAPI GifDecoder_Block_GetReaderByIndex(IWICMetadataBlockReader *iface,
UINT index, IWICMetadataReader **reader)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
TRACE("(%p,%u,%p)\n", iface, index, reader);
if (!reader || index != 0) return E_INVALIDARG;
return create_LSD_metadata_reader(This, reader);
}
static HRESULT WINAPI GifDecoder_Block_GetEnumerator(IWICMetadataBlockReader *iface,
IEnumUnknown **enumerator)
{
FIXME("(%p,%p): stub\n", iface, enumerator);
return E_NOTIMPL;
}
static const IWICMetadataBlockReaderVtbl GifDecoder_BlockVtbl =
{
GifDecoder_Block_QueryInterface,
GifDecoder_Block_AddRef,
GifDecoder_Block_Release,
GifDecoder_Block_GetContainerFormat,
GifDecoder_Block_GetCount,
GifDecoder_Block_GetReaderByIndex,
GifDecoder_Block_GetEnumerator
};
HRESULT GifDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
GifDecoder *This;
@ -832,6 +967,7 @@ HRESULT GifDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &GifDecoder_Vtbl;
This->IWICMetadataBlockReader_iface.lpVtbl = &GifDecoder_BlockVtbl;
This->ref = 1;
This->initialized = FALSE;
This->gif = NULL;

2
dlls/windowscodecs/tests/metadata.c
View File

@ -1046,7 +1046,6 @@ static void test_metadata_gif(void)
/* global metadata block */
hr = IWICBitmapDecoder_QueryInterface(decoder, &IID_IWICMetadataBlockReader, (void **)&blockreader);
todo_wine
ok(hr == S_OK || broken(hr == E_NOINTERFACE) /* before Win7 */, "QueryInterface error %#x\n", hr);
if (SUCCEEDED(hr))
@ -1149,7 +1148,6 @@ todo_wine
/* global metadata block */
hr = IWICBitmapDecoder_QueryInterface(decoder, &IID_IWICMetadataBlockReader, (void **)&blockreader);
todo_wine
ok(hr == S_OK || broken(hr == E_NOINTERFACE) /* before Win7 */, "QueryInterface error %#x\n", hr);
if (SUCCEEDED(hr))