static HRESULT WINAPI ComponentFactory_CreateDecoderFromFilename(
IWICComponentFactory *iface, LPCWSTR wzFilename, const GUID *pguidVendor,
DWORD dwDesiredAccess, WICDecodeOptions metadataOptions,
IWICBitmapDecoder **ppIDecoder)
{
IWICStream *stream;
HRESULT hr;
TRACE("(%p,%s,%s,%u,%u,%p)\n", iface, debugstr_w(wzFilename),
debugstr_guid(pguidVendor), dwDesiredAccess, metadataOptions, ppIDecoder);
hr = StreamImpl_Create(&stream);
if (SUCCEEDED(hr))
{
hr = IWICStream_InitializeFromFilename(stream, wzFilename, dwDesiredAccess);
if (SUCCEEDED(hr))
{
hr = IWICComponentFactory_CreateDecoderFromStream(iface, (IStream*)stream,
pguidVendor, metadataOptions, ppIDecoder);
}
IWICStream_Release(stream);
}
return hr;
}
HRESULT stream_initialize_from_filehandle(IWICStream *iface, HANDLE file)
{
IWICStreamImpl *This = impl_from_IWICStream(iface);
StreamOnFileHandle *pObject;
IWICStream *stream = NULL;
HANDLE map;
void *mem;
LARGE_INTEGER size;
HRESULT hr;
TRACE("(%p,%p)\n", iface, file);
if (This->pStream) return WINCODEC_ERR_WRONGSTATE;
hr = map_file(file, &map, &mem, &size);
if (FAILED(hr)) return hr;
hr = StreamImpl_Create(&stream);
if (FAILED(hr)) goto error;
hr = IWICStreamImpl_InitializeFromMemory(stream, mem, size.u.LowPart);
if (FAILED(hr)) goto error;
pObject = HeapAlloc(GetProcessHeap(), 0, sizeof(StreamOnFileHandle));
if (!pObject)
{
hr = E_OUTOFMEMORY;
goto error;
}
pObject->IStream_iface.lpVtbl = &StreamOnFileHandle_Vtbl;
pObject->ref = 1;
pObject->map = map;
pObject->mem = mem;
pObject->stream = stream;
if (InterlockedCompareExchangePointer((void**)&This->pStream, pObject, NULL))
{
/* Some other thread set the stream first. */
IStream_Release(&pObject->IStream_iface);
return WINCODEC_ERR_WRONGSTATE;
}
return S_OK;
error:
if (stream) IWICStream_Release(stream);
UnmapViewOfFile(mem);
CloseHandle(map);
return hr;
}
static HRESULT WINAPI ComponentFactory_CreateDecoderFromFileHandle(
IWICComponentFactory *iface, ULONG_PTR hFile, const GUID *pguidVendor,
WICDecodeOptions metadataOptions, IWICBitmapDecoder **ppIDecoder)
{
IWICStream *stream;
HRESULT hr;
TRACE("(%p,%lx,%s,%u,%p)\n", iface, hFile, debugstr_guid(pguidVendor),
metadataOptions, ppIDecoder);
hr = StreamImpl_Create(&stream);
if (SUCCEEDED(hr))
{
hr = stream_initialize_from_filehandle(stream, (HANDLE)hFile);
if (SUCCEEDED(hr))
{
hr = IWICComponentFactory_CreateDecoderFromStream(iface, (IStream*)stream,
pguidVendor, metadataOptions, ppIDecoder);
}
IWICStream_Release(stream);
}
return hr;
}
static HRESULT WINAPI ComponentFactory_CreateStream(IWICComponentFactory *iface,
IWICStream **ppIWICStream)
{
TRACE("(%p,%p)\n", iface, ppIWICStream);
return StreamImpl_Create(ppIWICStream);
}
