Sweden-Number/dlls/windowscodecs/icoformat.c

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2009-08-20 16:22:16 +02:00
/*
* 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"
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#include "objbase.h"
#include "wincodec.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 {
const IWICBitmapDecoderVtbl *lpVtbl;
LONG ref;
BOOL initialized;
IStream *stream;
ICONHEADER header;
CRITICAL_SECTION lock; /* must be held when accessing stream */
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} IcoDecoder;
typedef struct {
const IWICBitmapFrameDecodeVtbl *lpVtbl;
LONG ref;
ICONDIRENTRY entry;
IcoDecoder *parent;
BYTE *bits;
} IcoFrameDecode;
static HRESULT WINAPI IcoFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
IcoFrameDecode *This = (IcoFrameDecode*)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 IcoFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
{
IcoFrameDecode *This = (IcoFrameDecode*)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI IcoFrameDecode_Release(IWICBitmapFrameDecode *iface)
{
IcoFrameDecode *This = (IcoFrameDecode*)iface;
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
IUnknown_Release((IUnknown*)This->parent);
HeapFree(GetProcessHeap(), 0, This->bits);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI IcoFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
IcoFrameDecode *This = (IcoFrameDecode*)iface;
*puiWidth = This->entry.bWidth ? This->entry.bWidth : 256;
*puiHeight = This->entry.bHeight ? This->entry.bHeight : 256;
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)
{
FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
return E_NOTIMPL;
}
static HRESULT WINAPI IcoFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static inline void pixel_set_trans(DWORD* pixel, BOOL transparent)
{
if (transparent) *pixel = 0;
else *pixel |= 0xff000000;
}
static HRESULT IcoFrameDecode_ReadPixels(IcoFrameDecode *This)
{
BITMAPINFOHEADER bih;
DWORD colors[256];
UINT colorcount=0;
LARGE_INTEGER seek;
ULONG bytesread;
HRESULT hr;
BYTE *tempdata = NULL;
BYTE *bits = NULL;
UINT bitsStride;
UINT bitsSize;
UINT width, height;
width = This->entry.bWidth ? This->entry.bWidth : 256;
height = This->entry.bHeight ? This->entry.bHeight : 256;
/* read the BITMAPINFOHEADER */
seek.QuadPart = This->entry.dwDIBOffset;
hr = IStream_Seek(This->parent->stream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->parent->stream, &bih, sizeof(BITMAPINFOHEADER), &bytesread);
if (FAILED(hr) || bytesread != sizeof(BITMAPINFOHEADER)) goto fail;
if (bih.biBitCount <= 8)
{
/* read the palette */
colorcount = bih.biClrUsed ? bih.biClrUsed : 1 << bih.biBitCount;
hr = IStream_Read(This->parent->stream, colors, sizeof(RGBQUAD)*colorcount, &bytesread);
if (FAILED(hr) || bytesread != sizeof(RGBQUAD)*colorcount) goto fail;
}
bitsStride = width * 4;
bitsSize = bitsStride * height;
/* read the XOR data */
switch (bih.biBitCount)
{
case 1:
{
UINT xorBytesPerRow = (width+31)/32*4;
UINT xorBytes = xorBytesPerRow * height;
INT xorStride;
BYTE *xorRow;
BYTE *bitsRow;
UINT x, y;
tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
if (!tempdata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
if (FAILED(hr) || bytesread != xorBytes) goto fail;
if (bih.biHeight > 0) /* bottom-up DIB */
{
xorStride = -xorBytesPerRow;
xorRow = tempdata + (height-1)*xorBytesPerRow;
}
else /* top-down DIB */
{
xorStride = xorBytesPerRow;
xorRow = tempdata;
}
bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
/* palette-map the 1-bit data */
bitsRow = bits;
for (y=0; y<height; y++) {
BYTE *xorByte=xorRow;
DWORD *bitsPixel=(DWORD*)bitsRow;
for (x=0; x<width; x+=8) {
BYTE xorVal;
xorVal=*xorByte++;
*bitsPixel++ = colors[xorVal>>7];
if (x+1 < width) *bitsPixel++ = colors[xorVal>>6&1];
if (x+2 < width) *bitsPixel++ = colors[xorVal>>5&1];
if (x+3 < width) *bitsPixel++ = colors[xorVal>>4&1];
if (x+4 < width) *bitsPixel++ = colors[xorVal>>3&1];
if (x+5 < width) *bitsPixel++ = colors[xorVal>>2&1];
if (x+6 < width) *bitsPixel++ = colors[xorVal>>1&1];
if (x+7 < width) *bitsPixel++ = colors[xorVal&1];
}
xorRow += xorStride;
bitsRow += bitsStride;
}
HeapFree(GetProcessHeap(), 0, tempdata);
break;
}
case 4:
{
UINT xorBytesPerRow = (width+7)/8*4;
UINT xorBytes = xorBytesPerRow * height;
INT xorStride;
BYTE *xorRow;
BYTE *bitsRow;
UINT x, y;
tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
if (!tempdata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
if (FAILED(hr) || bytesread != xorBytes) goto fail;
if (bih.biHeight > 0) /* bottom-up DIB */
{
xorStride = -xorBytesPerRow;
xorRow = tempdata + (height-1)*xorBytesPerRow;
}
else /* top-down DIB */
{
xorStride = xorBytesPerRow;
xorRow = tempdata;
}
bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
/* palette-map the 4-bit data */
bitsRow = bits;
for (y=0; y<height; y++) {
BYTE *xorByte=xorRow;
DWORD *bitsPixel=(DWORD*)bitsRow;
for (x=0; x<width; x+=2) {
BYTE xorVal;
xorVal=*xorByte++;
*bitsPixel++ = colors[xorVal>>4];
if (x+1 < width) *bitsPixel++ = colors[xorVal&0xf];
}
xorRow += xorStride;
bitsRow += bitsStride;
}
HeapFree(GetProcessHeap(), 0, tempdata);
break;
}
case 8:
{
UINT xorBytesPerRow = (width+3)/4*4;
UINT xorBytes = xorBytesPerRow * height;
INT xorStride;
BYTE *xorRow;
BYTE *bitsRow;
UINT x, y;
tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
if (!tempdata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
if (FAILED(hr) || bytesread != xorBytes) goto fail;
if (bih.biHeight > 0) /* bottom-up DIB */
{
xorStride = -xorBytesPerRow;
xorRow = tempdata + (height-1)*xorBytesPerRow;
}
else /* top-down DIB */
{
xorStride = xorBytesPerRow;
xorRow = tempdata;
}
bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
/* palette-map the 8-bit data */
bitsRow = bits;
for (y=0; y<height; y++) {
BYTE *xorByte=xorRow;
DWORD *bitsPixel=(DWORD*)bitsRow;
for (x=0; x<width; x++)
*bitsPixel++ = colors[*xorByte++];
xorRow += xorStride;
bitsRow += bitsStride;
}
HeapFree(GetProcessHeap(), 0, tempdata);
break;
}
case 24:
{
UINT xorBytesPerRow = (width*3+3)/4*4;
UINT xorBytes = xorBytesPerRow * height;
INT xorStride;
BYTE *xorRow;
BYTE *bitsRow;
UINT x, y;
tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
if (!tempdata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
if (FAILED(hr) || bytesread != xorBytes) goto fail;
if (bih.biHeight > 0) /* bottom-up DIB */
{
xorStride = -xorBytesPerRow;
xorRow = tempdata + (height-1)*xorBytesPerRow;
}
else /* top-down DIB */
{
xorStride = xorBytesPerRow;
xorRow = tempdata;
}
bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
/* copy BGR->BGRA */
bitsRow = bits;
for (y=0; y<height; y++) {
BYTE *xorByte=xorRow;
BYTE *bitsByte=bitsRow;
for (x=0; x<width; x++)
{
*bitsByte++ = *xorByte++; /* blue */
*bitsByte++ = *xorByte++; /* green */
*bitsByte++ = *xorByte++; /* red */
bitsByte++; /* alpha */
}
xorRow += xorStride;
bitsRow += bitsStride;
}
HeapFree(GetProcessHeap(), 0, tempdata);
break;
}
case 32:
{
UINT xorBytesPerRow = width*4;
UINT xorBytes = xorBytesPerRow * height;
bits = HeapAlloc(GetProcessHeap(), 0, xorBytes);
if (!bits)
{
hr = E_OUTOFMEMORY;
goto fail;
}
if (bih.biHeight > 0) /* bottom-up DIB */
{
/* read the rows backwards so we get a top-down DIB */
UINT i;
BYTE *xorRow = bits + xorBytesPerRow * (height-1);
for (i=0; i<height; i++)
{
hr = IStream_Read(This->parent->stream, xorRow, xorBytesPerRow, &bytesread);
if (FAILED(hr) || bytesread != xorBytesPerRow) goto fail;
xorRow -= xorBytesPerRow;
}
}
else /* top-down DIB */
{
hr = IStream_Read(This->parent->stream, bits, xorBytes, &bytesread);
if (FAILED(hr) || bytesread != xorBytes) goto fail;
}
break;
}
default:
FIXME("unsupported bitcount: %u\n", bih.biBitCount);
goto fail;
}
if (bih.biBitCount < 32)
{
/* set alpha data based on the AND mask */
UINT andBytesPerRow = (width+31)/32*4;
UINT andBytes = andBytesPerRow * height;
INT andStride;
BYTE *andRow;
BYTE *bitsRow;
UINT x, y;
tempdata = HeapAlloc(GetProcessHeap(), 0, andBytes);
if (!tempdata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
hr = IStream_Read(This->parent->stream, tempdata, andBytes, &bytesread);
if (FAILED(hr) || bytesread != andBytes) goto fail;
if (bih.biHeight > 0) /* bottom-up DIB */
{
andStride = -andBytesPerRow;
andRow = tempdata + (height-1)*andBytesPerRow;
}
else /* top-down DIB */
{
andStride = andBytesPerRow;
andRow = tempdata;
}
bitsRow = bits;
for (y=0; y<height; y++) {
BYTE *andByte=andRow;
DWORD *bitsPixel=(DWORD*)bitsRow;
for (x=0; x<width; x+=8) {
BYTE andVal=*andByte++;
pixel_set_trans(bitsPixel++, andVal>>7&1);
if (x+1 < width) pixel_set_trans(bitsPixel++, andVal>>6&1);
if (x+2 < width) pixel_set_trans(bitsPixel++, andVal>>5&1);
if (x+3 < width) pixel_set_trans(bitsPixel++, andVal>>4&1);
if (x+4 < width) pixel_set_trans(bitsPixel++, andVal>>3&1);
if (x+5 < width) pixel_set_trans(bitsPixel++, andVal>>2&1);
if (x+6 < width) pixel_set_trans(bitsPixel++, andVal>>1&1);
if (x+7 < width) pixel_set_trans(bitsPixel++, andVal&1);
}
andRow += andStride;
bitsRow += bitsStride;
}
HeapFree(GetProcessHeap(), 0, tempdata);
}
This->bits = bits;
return S_OK;
fail:
HeapFree(GetProcessHeap(), 0, tempdata);
HeapFree(GetProcessHeap(), 0, bits);
if (SUCCEEDED(hr)) hr = E_FAIL;
TRACE("<-- %x\n", hr);
return hr;
}
static HRESULT WINAPI IcoFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
IcoFrameDecode *This = (IcoFrameDecode*)iface;
HRESULT hr=S_OK;
UINT width, height, stride;
TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
EnterCriticalSection(&This->parent->lock);
if (!This->bits)
{
hr = IcoFrameDecode_ReadPixels(This);
}
LeaveCriticalSection(&This->parent->lock);
if (FAILED(hr)) return hr;
width = This->entry.bWidth ? This->entry.bWidth : 256;
height = This->entry.bHeight ? This->entry.bHeight : 256;
stride = width * 4;
return copy_pixels(32, This->bits, width, height, stride,
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 WINCODEC_ERR_CODECNOTHUMBNAIL;
}
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
};
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static HRESULT WINAPI IcoDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
IcoDecoder *This = (IcoDecoder*)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 IcoDecoder_AddRef(IWICBitmapDecoder *iface)
{
IcoDecoder *This = (IcoDecoder*)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI IcoDecoder_Release(IWICBitmapDecoder *iface)
{
IcoDecoder *This = (IcoDecoder*)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);
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HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI IcoDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
DWORD *pdwCapability)
{
FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
return E_NOTIMPL;
}
static HRESULT WINAPI IcoDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
IcoDecoder *This = (IcoDecoder*)iface;
LARGE_INTEGER seek;
HRESULT hr;
ULONG bytesread;
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) ||
This->header.idReserved != 0 ||
This->header.idType != 1)
{
hr = E_FAIL;
goto end;
}
This->initialized = TRUE;
This->stream = pIStream;
IStream_AddRef(pIStream);
end:
LeaveCriticalSection(&This->lock);
return hr;
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}
static HRESULT WINAPI IcoDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
FIXME("(%p,%p): stub\n", iface, pguidContainerFormat);
return E_NOTIMPL;
}
static HRESULT WINAPI IcoDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
return E_NOTIMPL;
}
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 = (IcoDecoder*)iface;
TRACE("(%p,%p)\n", iface, pCount);
if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
*pCount = This->header.idCount;
TRACE("<-- %u\n", *pCount);
return S_OK;
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}
static HRESULT WINAPI IcoDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
IcoDecoder *This = (IcoDecoder*)iface;
IcoFrameDecode *result=NULL;
LARGE_INTEGER seek;
HRESULT hr;
ULONG bytesread;
TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
EnterCriticalSection(&This->lock);
if (!This->initialized)
{
hr = WINCODEC_ERR_NOTINITIALIZED;
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->lpVtbl = &IcoFrameDecode_Vtbl;
result->ref = 1;
result->parent = This;
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, &result->entry, sizeof(ICONDIRENTRY), &bytesread);
if (FAILED(hr) || bytesread != sizeof(ICONDIRENTRY)) goto fail;
IWICBitmapDecoder_AddRef(iface);
*ppIBitmapFrame = (IWICBitmapFrameDecode*)result;
LeaveCriticalSection(&This->lock);
return S_OK;
fail:
LeaveCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, result);
if (SUCCEEDED(hr)) hr = E_FAIL;
TRACE("<-- %x\n", hr);
return hr;
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}
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(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
IcoDecoder *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(IcoDecoder));
if (!This) return E_OUTOFMEMORY;
This->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");
2009-08-20 16:22:16 +02:00
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);
return ret;
}