reactos/dll/win32/windowscodecs/icoformat.c

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/*
* Copyright 2009 Vincent Povirk for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
#include "pshpack1.h"
typedef struct {
BYTE bWidth;
BYTE bHeight;
BYTE bColorCount;
BYTE bReserved;
WORD wPlanes;
WORD wBitCount;
DWORD dwDIBSize;
DWORD dwDIBOffset;
} ICONDIRENTRY;
typedef struct
{
WORD idReserved;
WORD idType;
WORD idCount;
} ICONHEADER;
#include "poppack.h"
typedef struct {
IWICBitmapDecoder IWICBitmapDecoder_iface;
LONG ref;
BOOL initialized;
IStream *stream;
ICONHEADER header;
CRITICAL_SECTION lock; /* must be held when accessing stream */
} IcoDecoder;
typedef struct {
IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
LONG ref;
UINT width, height;
double dpiX, dpiY;
BYTE *bits;
} IcoFrameDecode;
static inline IcoDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
{
return CONTAINING_RECORD(iface, IcoDecoder, IWICBitmapDecoder_iface);
}
static inline IcoFrameDecode *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, IcoFrameDecode, IWICBitmapFrameDecode_iface);
}
static HRESULT WINAPI IcoFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapSource, iid) ||
IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
{
*ppv = &This->IWICBitmapFrameDecode_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI IcoFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
{
IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI IcoFrameDecode_Release(IWICBitmapFrameDecode *iface)
{
IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
HeapFree(GetProcessHeap(), 0, This->bits);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI IcoFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
*puiWidth = This->width;
*puiHeight = This->height;
TRACE("(%p) -> (%i,%i)\n", iface, *puiWidth, *puiHeight);
return S_OK;
}
static HRESULT WINAPI IcoFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
WICPixelFormatGUID *pPixelFormat)
{
memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI IcoFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
double *pDpiX, double *pDpiY)
{
IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
*pDpiX = This->dpiX;
*pDpiY = This->dpiY;
TRACE("(%p) -> (%f,%f)\n", iface, *pDpiX, *pDpiY);
return S_OK;
}
static HRESULT WINAPI IcoFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static HRESULT WINAPI IcoFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
IcoFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%s,%u,%u,%p)\n", iface, debug_wic_rect(prc), cbStride, cbBufferSize, pbBuffer);
return copy_pixels(32, This->bits, This->width, This->height, This->width * 4,
prc, cbStride, cbBufferSize, pbBuffer);
}
static HRESULT WINAPI IcoFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI IcoFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI IcoFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return IWICBitmapFrameDecode_QueryInterface(iface, &IID_IWICBitmapSource, (void **)ppIThumbnail);
}
static const IWICBitmapFrameDecodeVtbl IcoFrameDecode_Vtbl = {
IcoFrameDecode_QueryInterface,
IcoFrameDecode_AddRef,
IcoFrameDecode_Release,
IcoFrameDecode_GetSize,
IcoFrameDecode_GetPixelFormat,
IcoFrameDecode_GetResolution,
IcoFrameDecode_CopyPalette,
IcoFrameDecode_CopyPixels,
IcoFrameDecode_GetMetadataQueryReader,
IcoFrameDecode_GetColorContexts,
IcoFrameDecode_GetThumbnail
};
static inline void pixel_set_trans(DWORD* pixel, BOOL transparent)
{
if (transparent) *pixel = 0;
else *pixel |= 0xff000000;
}
static HRESULT ReadIcoDib(IStream *stream, IcoFrameDecode *result)
{
HRESULT hr;
BmpDecoder *bmp_decoder;
IWICBitmapDecoder *decoder;
IWICBitmapFrameDecode *framedecode;
WICPixelFormatGUID pixelformat;
IWICBitmapSource *source;
BOOL has_alpha=FALSE; /* if TRUE, alpha data might be in the image data */
WICRect rc;
hr = IcoDibDecoder_CreateInstance(&bmp_decoder);
if (SUCCEEDED(hr))
{
BmpDecoder_GetWICDecoder(bmp_decoder, &decoder);
hr = IWICBitmapDecoder_Initialize(decoder, stream, WICDecodeMetadataCacheOnLoad);
if (SUCCEEDED(hr))
hr = IWICBitmapDecoder_GetFrame(decoder, 0, &framedecode);
if (SUCCEEDED(hr))
{
hr = IWICBitmapFrameDecode_GetSize(framedecode, &result->width, &result->height);
if (SUCCEEDED(hr))
{
result->bits = HeapAlloc(GetProcessHeap(), 0, result->width * result->height * 4);
if (!result->bits) hr = E_OUTOFMEMORY;
}
if (SUCCEEDED(hr))
hr = IWICBitmapFrameDecode_GetPixelFormat(framedecode, &pixelformat);
if (IsEqualGUID(&pixelformat, &GUID_WICPixelFormat32bppBGR) ||
IsEqualGUID(&pixelformat, &GUID_WICPixelFormat32bppBGRA))
{
source = (IWICBitmapSource*)framedecode;
IWICBitmapSource_AddRef(source);
has_alpha = TRUE;
}
else
{
hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA,
(IWICBitmapSource*)framedecode, &source);
has_alpha = FALSE;
}
if (SUCCEEDED(hr))
{
rc.X = 0;
rc.Y = 0;
rc.Width = result->width;
rc.Height = result->height;
hr = IWICBitmapSource_CopyPixels(source, &rc, result->width * 4,
result->width * result->height * 4, result->bits);
IWICBitmapSource_Release(source);
}
if (SUCCEEDED(hr))
hr = IWICBitmapFrameDecode_GetResolution(framedecode, &result->dpiX, &result->dpiY);
IWICBitmapFrameDecode_Release(framedecode);
}
if (SUCCEEDED(hr) && has_alpha)
{
/* If the alpha channel is fully transparent, we should ignore it. */
int nonzero_alpha = 0;
UINT i;
for (i=0; i<(result->height*result->width); i++)
{
if (result->bits[i*4+3] != 0)
{
nonzero_alpha = 1;
break;
}
}
if (!nonzero_alpha)
{
for (i=0; i<(result->height*result->width); i++)
result->bits[i*4+3] = 0xff;
has_alpha = FALSE;
}
}
if (SUCCEEDED(hr) && !has_alpha)
{
/* set alpha data based on the AND mask */
UINT andBytesPerRow = (result->width+31)/32*4;
UINT andBytes = andBytesPerRow * result->height;
INT andStride;
BYTE *tempdata=NULL;
BYTE *andRow;
BYTE *bitsRow;
UINT bitsStride = result->width * 4;
UINT x, y;
ULONG offset;
ULONG bytesread;
LARGE_INTEGER seek;
int topdown;
BmpDecoder_FindIconMask(bmp_decoder, &offset, &topdown);
if (offset)
{
seek.QuadPart = offset;
hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, 0);
if (SUCCEEDED(hr))
{
tempdata = HeapAlloc(GetProcessHeap(), 0, andBytes);
if (!tempdata) hr = E_OUTOFMEMORY;
}
if (SUCCEEDED(hr))
hr = IStream_Read(stream, tempdata, andBytes, &bytesread);
if (SUCCEEDED(hr) && bytesread == andBytes)
{
if (topdown)
{
andStride = andBytesPerRow;
andRow = tempdata;
}
else
{
andStride = -andBytesPerRow;
andRow = tempdata + (result->height-1)*andBytesPerRow;
}
bitsRow = result->bits;
for (y=0; y<result->height; y++) {
BYTE *andByte=andRow;
DWORD *bitsPixel=(DWORD*)bitsRow;
for (x=0; x<result->width; x+=8) {
BYTE andVal=*andByte++;
pixel_set_trans(bitsPixel++, andVal>>7&1);
if (x+1 < result->width) pixel_set_trans(bitsPixel++, andVal>>6&1);
if (x+2 < result->width) pixel_set_trans(bitsPixel++, andVal>>5&1);
if (x+3 < result->width) pixel_set_trans(bitsPixel++, andVal>>4&1);
if (x+4 < result->width) pixel_set_trans(bitsPixel++, andVal>>3&1);
if (x+5 < result->width) pixel_set_trans(bitsPixel++, andVal>>2&1);
if (x+6 < result->width) pixel_set_trans(bitsPixel++, andVal>>1&1);
if (x+7 < result->width) pixel_set_trans(bitsPixel++, andVal&1);
}
andRow += andStride;
bitsRow += bitsStride;
}
}
HeapFree(GetProcessHeap(), 0, tempdata);
}
}
IWICBitmapDecoder_Release(decoder);
}
return hr;
}
static HRESULT ReadIcoPng(IStream *stream, IcoFrameDecode *result)
{
IWICBitmapDecoder *decoder = NULL;
IWICBitmapFrameDecode *sourceFrame = NULL;
IWICBitmapSource *sourceBitmap = NULL;
WICRect rect;
HRESULT hr;
hr = PngDecoder_CreateInstance(&IID_IWICBitmapDecoder, (void**)&decoder);
if (FAILED(hr))
goto end;
hr = IWICBitmapDecoder_Initialize(decoder, stream, WICDecodeMetadataCacheOnLoad);
if (FAILED(hr))
goto end;
hr = IWICBitmapDecoder_GetFrame(decoder, 0, &sourceFrame);
if (FAILED(hr))
goto end;
hr = WICConvertBitmapSource(&GUID_WICPixelFormat32bppBGRA, (IWICBitmapSource*)sourceFrame, &sourceBitmap);
if (FAILED(hr))
goto end;
hr = IWICBitmapFrameDecode_GetSize(sourceFrame, &result->width, &result->height);
if (FAILED(hr))
goto end;
hr = IWICBitmapFrameDecode_GetResolution(sourceFrame, &result->dpiX, &result->dpiY);
if (FAILED(hr))
goto end;
result->bits = HeapAlloc(GetProcessHeap(), 0, 4 * result->width * result->height);
if (result->bits == NULL)
{
hr = E_OUTOFMEMORY;
goto end;
}
rect.X = 0;
rect.Y = 0;
rect.Width = result->width;
rect.Height = result->height;
hr = IWICBitmapSource_CopyPixels(sourceBitmap, &rect, 4*result->width,
4*result->width*result->height, result->bits);
end:
if (decoder != NULL)
IWICBitmapDecoder_Release(decoder);
if (sourceFrame != NULL)
IWICBitmapFrameDecode_Release(sourceFrame);
if (sourceBitmap != NULL)
IWICBitmapSource_Release(sourceBitmap);
return hr;
}
static HRESULT WINAPI IcoDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapDecoder, iid))
{
*ppv = &This->IWICBitmapDecoder_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI IcoDecoder_AddRef(IWICBitmapDecoder *iface)
{
IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI IcoDecoder_Release(IWICBitmapDecoder *iface)
{
IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
if (This->stream) IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI IcoDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *stream,
DWORD *capability)
{
HRESULT hr;
TRACE("(%p,%p,%p)\n", iface, stream, capability);
if (!stream || !capability) return E_INVALIDARG;
hr = IWICBitmapDecoder_Initialize(iface, stream, WICDecodeMetadataCacheOnDemand);
if (hr != S_OK) return hr;
*capability = WICBitmapDecoderCapabilityCanDecodeAllImages;
return S_OK;
}
static HRESULT WINAPI IcoDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
LARGE_INTEGER seek;
HRESULT hr;
ULONG bytesread;
STATSTG statstg;
unsigned int i;
TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
if (This->initialized)
{
hr = WINCODEC_ERR_WRONGSTATE;
goto end;
}
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
hr = IStream_Read(pIStream, &This->header, sizeof(ICONHEADER), &bytesread);
if (FAILED(hr)) goto end;
if (bytesread != sizeof(ICONHEADER))
{
hr = WINCODEC_ERR_STREAMREAD;
goto end;
}
if (This->header.idReserved != 0 ||
This->header.idType != 1)
{
hr = E_FAIL;
goto end;
}
hr = IStream_Stat(pIStream, &statstg, STATFLAG_NONAME);
if (FAILED(hr))
{
WARN("Stat() failed, hr %#x.\n", hr);
goto end;
}
for (i = 0; i < This->header.idCount; i++)
{
ICONDIRENTRY direntry;
hr = IStream_Read(pIStream, &direntry, sizeof(direntry), &bytesread);
if (FAILED(hr)) goto end;
if (bytesread != sizeof(direntry) || (direntry.dwDIBSize + direntry.dwDIBOffset > statstg.cbSize.QuadPart))
{
hr = WINCODEC_ERR_BADIMAGE;
goto end;
}
}
This->initialized = TRUE;
This->stream = pIStream;
IStream_AddRef(pIStream);
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI IcoDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatIco, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI IcoDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
return get_decoder_info(&CLSID_WICIcoDecoder, ppIDecoderInfo);
}
static HRESULT WINAPI IcoDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static HRESULT WINAPI IcoDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI IcoDecoder_GetPreview(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIBitmapSource)
{
TRACE("(%p,%p)\n", iface, ppIBitmapSource);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI IcoDecoder_GetColorContexts(IWICBitmapDecoder *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI IcoDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT WINAPI IcoDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
if (!pCount) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
*pCount = This->initialized ? This->header.idCount : 0;
LeaveCriticalSection(&This->lock);
TRACE("(%p) <-- %d\n", iface, *pCount);
return S_OK;
}
static HRESULT WINAPI IcoDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
IcoDecoder *This = impl_from_IWICBitmapDecoder(iface);
IcoFrameDecode *result=NULL;
LARGE_INTEGER seek;
ULARGE_INTEGER offset, length;
HRESULT hr;
ULONG bytesread;
ICONDIRENTRY entry;
IWICStream *substream=NULL;
DWORD magic;
TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
EnterCriticalSection(&This->lock);
if (!This->initialized)
{
hr = WINCODEC_ERR_FRAMEMISSING;
goto fail;
}
if (This->header.idCount < index)
{
hr = E_INVALIDARG;
goto fail;
}
result = HeapAlloc(GetProcessHeap(), 0, sizeof(IcoFrameDecode));
if (!result)
{
hr = E_OUTOFMEMORY;
goto fail;
}
result->IWICBitmapFrameDecode_iface.lpVtbl = &IcoFrameDecode_Vtbl;
result->ref = 1;
result->bits = NULL;
/* read the icon entry */
seek.QuadPart = sizeof(ICONHEADER) + sizeof(ICONDIRENTRY) * index;
hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, 0);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->stream, &entry, sizeof(ICONDIRENTRY), &bytesread);
if (FAILED(hr) || bytesread != sizeof(ICONDIRENTRY)) goto fail;
/* create a stream object for this icon */
hr = StreamImpl_Create(&substream);
if (FAILED(hr)) goto fail;
offset.QuadPart = entry.dwDIBOffset;
length.QuadPart = entry.dwDIBSize;
hr = IWICStream_InitializeFromIStreamRegion(substream, This->stream, offset, length);
if (FAILED(hr)) goto fail;
/* read the bitmapinfo size or magic number */
hr = IWICStream_Read(substream, &magic, sizeof(magic), &bytesread);
if (FAILED(hr) || bytesread != sizeof(magic)) goto fail;
/* forward to the appropriate decoding function based on the magic number */
switch (magic)
{
case sizeof(BITMAPCOREHEADER):
case 64: /* sizeof(BITMAPCOREHEADER2) */
case sizeof(BITMAPINFOHEADER):
case sizeof(BITMAPV4HEADER):
case sizeof(BITMAPV5HEADER):
hr = ReadIcoDib((IStream*)substream, result);
break;
case 0x474e5089:
hr = ReadIcoPng((IStream*)substream, result);
break;
default:
FIXME("Unrecognized ICO frame magic: %x\n", magic);
hr = E_FAIL;
break;
}
if (FAILED(hr)) goto fail;
*ppIBitmapFrame = &result->IWICBitmapFrameDecode_iface;
LeaveCriticalSection(&This->lock);
IWICStream_Release(substream);
return S_OK;
fail:
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, result);
if (substream) IWICStream_Release(substream);
if (SUCCEEDED(hr)) hr = E_FAIL;
TRACE("<-- %x\n", hr);
return hr;
}
static const IWICBitmapDecoderVtbl IcoDecoder_Vtbl = {
IcoDecoder_QueryInterface,
IcoDecoder_AddRef,
IcoDecoder_Release,
IcoDecoder_QueryCapability,
IcoDecoder_Initialize,
IcoDecoder_GetContainerFormat,
IcoDecoder_GetDecoderInfo,
IcoDecoder_CopyPalette,
IcoDecoder_GetMetadataQueryReader,
IcoDecoder_GetPreview,
IcoDecoder_GetColorContexts,
IcoDecoder_GetThumbnail,
IcoDecoder_GetFrameCount,
IcoDecoder_GetFrame
};
HRESULT IcoDecoder_CreateInstance(REFIID iid, void** ppv)
{
IcoDecoder *This;
HRESULT ret;
TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
*ppv = NULL;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(IcoDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &IcoDecoder_Vtbl;
This->ref = 1;
This->stream = NULL;
This->initialized = FALSE;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": IcoDecoder.lock");
ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
return ret;
}