wine/dlls/windowscodecs/bmpdecode.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 "winreg.h"
#include "wingdi.h"
#include "objbase.h"
#include "wincodec.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
typedef struct {
DWORD bc2Size;
DWORD bc2Width;
DWORD bc2Height;
WORD bc2Planes;
WORD bc2BitCount;
DWORD bc2Compression;
DWORD bc2SizeImage;
DWORD bc2XRes;
DWORD bc2YRes;
DWORD bc2ClrUsed;
DWORD bc2ClrImportant;
/* same as BITMAPINFOHEADER until this point */
WORD bc2ResUnit;
WORD bc2Reserved;
WORD bc2Orientation;
WORD bc2Halftoning;
DWORD bc2HalftoneSize1;
DWORD bc2HalftoneSize2;
DWORD bc2ColorSpace;
DWORD bc2AppData;
} BITMAPCOREHEADER2;
struct BmpFrameDecode;
typedef HRESULT (*ReadDataFunc)(struct BmpFrameDecode* This);
typedef struct BmpFrameDecode {
const IWICBitmapFrameDecodeVtbl *lpVtbl;
LONG ref;
IStream *stream;
BITMAPFILEHEADER bfh;
BITMAPV5HEADER bih;
const WICPixelFormatGUID *pixelformat;
int bitsperpixel;
ReadDataFunc read_data_func;
INT stride;
BYTE *imagedata;
BYTE *imagedatastart;
} BmpFrameDecode;
static HRESULT WINAPI BmpFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
BmpFrameDecode *This = (BmpFrameDecode*)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;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI BmpFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
{
BmpFrameDecode *This = (BmpFrameDecode*)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI BmpFrameDecode_Release(IWICBitmapFrameDecode *iface)
{
BmpFrameDecode *This = (BmpFrameDecode*)iface;
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This->imagedata);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI BmpFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
BmpFrameDecode *This = (BmpFrameDecode*)iface;
TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
*puiWidth = bch->bcWidth;
*puiHeight = bch->bcHeight;
}
else
{
*puiWidth = This->bih.bV5Width;
*puiHeight = abs(This->bih.bV5Height);
}
return S_OK;
}
static HRESULT WINAPI BmpFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
WICPixelFormatGUID *pPixelFormat)
{
BmpFrameDecode *This = (BmpFrameDecode*)iface;
TRACE("(%p,%p)\n", iface, pPixelFormat);
memcpy(pPixelFormat, This->pixelformat, sizeof(GUID));
return S_OK;
}
static HRESULT BmpHeader_GetResolution(BITMAPV5HEADER *bih, double *pDpiX, double *pDpiY)
{
switch (bih->bV5Size)
{
case sizeof(BITMAPCOREHEADER):
*pDpiX = 96.0;
*pDpiY = 96.0;
return S_OK;
case sizeof(BITMAPCOREHEADER2):
case sizeof(BITMAPINFOHEADER):
case sizeof(BITMAPV4HEADER):
case sizeof(BITMAPV5HEADER):
*pDpiX = bih->bV5XPelsPerMeter * 0.0254;
*pDpiY = bih->bV5YPelsPerMeter * 0.0254;
return S_OK;
default:
return E_FAIL;
}
}
static HRESULT WINAPI BmpFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
double *pDpiX, double *pDpiY)
{
BmpFrameDecode *This = (BmpFrameDecode*)iface;
TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
return BmpHeader_GetResolution(&This->bih, pDpiX, pDpiY);
}
static HRESULT WINAPI BmpFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
HRESULT hr;
BmpFrameDecode *This = (BmpFrameDecode*)iface;
TRACE("(%p,%p)\n", iface, pIPalette);
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
if (bch->bcBitCount <= 8)
{
/* 2**n colors in BGR format after the header */
int count = 1 << bch->bcBitCount;
WICColor *wiccolors;
ULONG tablesize, bytesread;
RGBTRIPLE *bgrcolors;
LARGE_INTEGER offset;
int i;
wiccolors = HeapAlloc(GetProcessHeap(), 0, sizeof(WICColor) * count);
tablesize = sizeof(RGBTRIPLE) * count;
bgrcolors = HeapAlloc(GetProcessHeap(), 0, tablesize);
if (!wiccolors || !bgrcolors)
{
HeapFree(GetProcessHeap(), 0, wiccolors);
HeapFree(GetProcessHeap(), 0, bgrcolors);
return E_OUTOFMEMORY;
}
offset.QuadPart = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPCOREHEADER);
hr = IStream_Seek(This->stream, offset, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) return hr;
hr = IStream_Read(This->stream, bgrcolors, tablesize, &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != tablesize) return E_FAIL;
for (i=0; i<count; i++)
{
wiccolors[i] = 0xff000000|
(bgrcolors[i].rgbtRed<<16)|
(bgrcolors[i].rgbtGreen<<8)|
bgrcolors[i].rgbtBlue;
}
hr = IWICPalette_InitializeCustom(pIPalette, wiccolors, count);
HeapFree(GetProcessHeap(), 0, wiccolors);
HeapFree(GetProcessHeap(), 0, bgrcolors);
return hr;
}
else
{
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
}
else
{
if (This->bih.bV5BitCount <= 8)
{
int count;
WICColor *wiccolors;
ULONG tablesize, bytesread;
LARGE_INTEGER offset;
int i;
if (This->bih.bV5ClrUsed == 0)
count = 1 << This->bih.bV5BitCount;
else
count = This->bih.bV5ClrUsed;
tablesize = sizeof(WICColor) * count;
wiccolors = HeapAlloc(GetProcessHeap(), 0, tablesize);
if (!wiccolors) return E_OUTOFMEMORY;
offset.QuadPart = sizeof(BITMAPFILEHEADER) + This->bih.bV5Size;
hr = IStream_Seek(This->stream, offset, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) return hr;
hr = IStream_Read(This->stream, wiccolors, tablesize, &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != tablesize) return E_FAIL;
/* convert from BGR to BGRA by setting alpha to 100% */
for (i=0; i<count; i++)
wiccolors[i] |= 0xff000000;
hr = IWICPalette_InitializeCustom(pIPalette, wiccolors, count);
HeapFree(GetProcessHeap(), 0, wiccolors);
return hr;
}
else
{
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
}
}
static HRESULT WINAPI BmpFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
BmpFrameDecode *This = (BmpFrameDecode*)iface;
HRESULT hr;
UINT width, height;
TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
if (!This->imagedata)
{
hr = This->read_data_func(This);
if (FAILED(hr)) return hr;
}
hr = BmpFrameDecode_GetSize(iface, &width, &height);
if (FAILED(hr)) return hr;
return copy_pixels(This->bitsperpixel, This->imagedatastart,
width, height, This->stride,
prc, cbStride, cbBufferSize, pbBuffer);
}
static HRESULT WINAPI BmpFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
return E_NOTIMPL;
}
static HRESULT BmpFrameDecode_ReadUncompressed(BmpFrameDecode* This)
{
UINT bytesperrow;
UINT width, height;
UINT datasize;
int bottomup;
HRESULT hr;
LARGE_INTEGER offbits;
ULONG bytesread;
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
width = bch->bcWidth;
height = bch->bcHeight;
bottomup = 1;
}
else
{
width = This->bih.bV5Width;
height = abs(This->bih.bV5Height);
bottomup = (This->bih.bV5Height > 0);
}
/* row sizes in BMP files must be divisible by 4 bytes */
bytesperrow = (((width * This->bitsperpixel)+31)/32)*4;
datasize = bytesperrow * height;
This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
if (!This->imagedata) return E_OUTOFMEMORY;
offbits.QuadPart = This->bfh.bfOffBits;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->stream, This->imagedata, datasize, &bytesread);
if (FAILED(hr) || bytesread != datasize) goto fail;
if (bottomup)
{
This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
This->stride = -bytesperrow;
}
else
{
This->imagedatastart = This->imagedata;
This->stride = bytesperrow;
}
return S_OK;
fail:
HeapFree(GetProcessHeap(), 0, This->imagedata);
This->imagedata = NULL;
if (SUCCEEDED(hr)) hr = E_FAIL;
return hr;
}
static HRESULT BmpFrameDecode_ReadUnsupported(BmpFrameDecode* This)
{
return E_FAIL;
}
static const IWICBitmapFrameDecodeVtbl BmpFrameDecode_Vtbl = {
BmpFrameDecode_QueryInterface,
BmpFrameDecode_AddRef,
BmpFrameDecode_Release,
BmpFrameDecode_GetSize,
BmpFrameDecode_GetPixelFormat,
BmpFrameDecode_GetResolution,
BmpFrameDecode_CopyPalette,
BmpFrameDecode_CopyPixels,
BmpFrameDecode_GetMetadataQueryReader,
BmpFrameDecode_GetColorContexts,
BmpFrameDecode_GetThumbnail
};
typedef struct {
const IWICBitmapDecoderVtbl *lpVtbl;
LONG ref;
BOOL initialized;
IStream *stream;
BITMAPFILEHEADER bfh;
BITMAPV5HEADER bih;
BmpFrameDecode *framedecode;
const WICPixelFormatGUID *pixelformat;
int bitsperpixel;
ReadDataFunc read_data_func;
} BmpDecoder;
static HRESULT BmpDecoder_ReadHeaders(BmpDecoder* This, IStream *stream)
{
HRESULT hr;
ULONG bytestoread, bytesread;
LARGE_INTEGER seek;
if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
seek.QuadPart = 0;
hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) return hr;
hr = IStream_Read(stream, &This->bfh, sizeof(BITMAPFILEHEADER), &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != sizeof(BITMAPFILEHEADER) ||
This->bfh.bfType != 0x4d42 /* "BM" */) return E_FAIL;
hr = IStream_Read(stream, &This->bih.bV5Size, sizeof(DWORD), &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != sizeof(DWORD) ||
(This->bih.bV5Size != sizeof(BITMAPCOREHEADER) &&
This->bih.bV5Size != sizeof(BITMAPCOREHEADER2) &&
This->bih.bV5Size != sizeof(BITMAPINFOHEADER) &&
This->bih.bV5Size != sizeof(BITMAPV4HEADER) &&
This->bih.bV5Size != sizeof(BITMAPV5HEADER))) return E_FAIL;
bytestoread = This->bih.bV5Size-sizeof(DWORD);
hr = IStream_Read(stream, &This->bih.bV5Width, bytestoread, &bytesread);
if (FAILED(hr)) return hr;
if (bytestoread != bytesread) return E_FAIL;
/* decide what kind of bitmap this is and how/if we can read it */
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
TRACE("BITMAPCOREHEADER with depth=%i\n", bch->bcBitCount);
This->bitsperpixel = bch->bcBitCount;
This->read_data_func = BmpFrameDecode_ReadUncompressed;
switch(bch->bcBitCount)
{
case 1:
This->pixelformat = &GUID_WICPixelFormat1bppIndexed;
break;
case 2:
This->pixelformat = &GUID_WICPixelFormat2bppIndexed;
break;
case 4:
This->pixelformat = &GUID_WICPixelFormat4bppIndexed;
break;
case 8:
This->pixelformat = &GUID_WICPixelFormat8bppIndexed;
break;
case 24:
This->pixelformat = &GUID_WICPixelFormat24bppBGR;
break;
default:
This->pixelformat = &GUID_WICPixelFormatUndefined;
WARN("unsupported bit depth %i for BITMAPCOREHEADER\n", bch->bcBitCount);
break;
}
}
else /* struct is compatible with BITMAPINFOHEADER */
{
TRACE("bitmap header=%i compression=%i depth=%i\n", This->bih.bV5Size, This->bih.bV5Compression, This->bih.bV5BitCount);
switch(This->bih.bV5Compression)
{
case BI_RGB:
This->bitsperpixel = This->bih.bV5BitCount;
This->read_data_func = BmpFrameDecode_ReadUncompressed;
switch(This->bih.bV5BitCount)
{
case 1:
This->pixelformat = &GUID_WICPixelFormat1bppIndexed;
break;
case 2:
This->pixelformat = &GUID_WICPixelFormat2bppIndexed;
break;
case 4:
This->pixelformat = &GUID_WICPixelFormat4bppIndexed;
break;
case 8:
This->pixelformat = &GUID_WICPixelFormat8bppIndexed;
break;
case 16:
This->pixelformat = &GUID_WICPixelFormat16bppBGR555;
break;
case 24:
This->pixelformat = &GUID_WICPixelFormat24bppBGR;
break;
case 32:
This->pixelformat = &GUID_WICPixelFormat32bppBGR;
break;
default:
This->pixelformat = &GUID_WICPixelFormatUndefined;
FIXME("unsupported bit depth %i for uncompressed RGB\n", This->bih.bV5BitCount);
}
break;
default:
This->bitsperpixel = 0;
This->read_data_func = BmpFrameDecode_ReadUnsupported;
This->pixelformat = &GUID_WICPixelFormatUndefined;
FIXME("unsupported bitmap type header=%i compression=%i depth=%i\n", This->bih.bV5Size, This->bih.bV5Compression, This->bih.bV5BitCount);
break;
}
}
This->initialized = TRUE;
return S_OK;
}
static HRESULT WINAPI BmpDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
BmpDecoder *This = (BmpDecoder*)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;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI BmpDecoder_AddRef(IWICBitmapDecoder *iface)
{
BmpDecoder *This = (BmpDecoder*)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI BmpDecoder_Release(IWICBitmapDecoder *iface)
{
BmpDecoder *This = (BmpDecoder*)iface;
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->stream) IStream_Release(This->stream);
if (This->framedecode) IUnknown_Release((IUnknown*)This->framedecode);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI BmpDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
DWORD *pdwCapability)
{
HRESULT hr;
BmpDecoder *This = (BmpDecoder*)iface;
hr = BmpDecoder_ReadHeaders(This, pIStream);
if (FAILED(hr)) return hr;
if (This->read_data_func == BmpFrameDecode_ReadUnsupported)
*pdwCapability = 0;
else
*pdwCapability = WICBitmapDecoderCapabilityCanDecodeAllImages;
return S_OK;
}
static HRESULT WINAPI BmpDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
HRESULT hr;
BmpDecoder *This = (BmpDecoder*)iface;
hr = BmpDecoder_ReadHeaders(This, pIStream);
if (SUCCEEDED(hr))
{
This->stream = pIStream;
IStream_AddRef(pIStream);
}
return hr;
}
static HRESULT WINAPI BmpDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatBmp, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI BmpDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static HRESULT WINAPI BmpDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpDecoder_GetPreview(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIBitmapSource)
{
FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpDecoder_GetColorContexts(IWICBitmapDecoder *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
return E_NOTIMPL;
}
static HRESULT WINAPI BmpDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
*pCount = 1;
return S_OK;
}
static HRESULT WINAPI BmpDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
BmpDecoder *This = (BmpDecoder*)iface;
if (index != 0) return E_INVALIDARG;
if (!This->stream) return WINCODEC_ERR_WRONGSTATE;
if (!This->framedecode)
{
This->framedecode = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpFrameDecode));
if (!This->framedecode) return E_OUTOFMEMORY;
This->framedecode->lpVtbl = &BmpFrameDecode_Vtbl;
This->framedecode->ref = 1;
This->framedecode->stream = This->stream;
IStream_AddRef(This->stream);
This->framedecode->bfh = This->bfh;
This->framedecode->bih = This->bih;
This->framedecode->pixelformat = This->pixelformat;
This->framedecode->bitsperpixel = This->bitsperpixel;
This->framedecode->read_data_func = This->read_data_func;
This->framedecode->imagedata = NULL;
}
*ppIBitmapFrame = (IWICBitmapFrameDecode*)This->framedecode;
IWICBitmapFrameDecode_AddRef((IWICBitmapFrameDecode*)This->framedecode);
return S_OK;
}
static const IWICBitmapDecoderVtbl BmpDecoder_Vtbl = {
BmpDecoder_QueryInterface,
BmpDecoder_AddRef,
BmpDecoder_Release,
BmpDecoder_QueryCapability,
BmpDecoder_Initialize,
BmpDecoder_GetContainerFormat,
BmpDecoder_GetDecoderInfo,
BmpDecoder_CopyPalette,
BmpDecoder_GetMetadataQueryReader,
BmpDecoder_GetPreview,
BmpDecoder_GetColorContexts,
BmpDecoder_GetThumbnail,
BmpDecoder_GetFrameCount,
BmpDecoder_GetFrame
};
HRESULT BmpDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
BmpDecoder *This;
HRESULT ret;
TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
*ppv = NULL;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpDecoder));
if (!This) return E_OUTOFMEMORY;
This->lpVtbl = &BmpDecoder_Vtbl;
This->ref = 1;
This->initialized = FALSE;
This->stream = NULL;
This->framedecode = NULL;
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);
return ret;
}