Sweden-Number/dlls/windowscodecs/gifformat.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 "objbase.h"
#include "wincodec.h"
#include "ungif.h"
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#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
typedef struct {
IWICBitmapDecoder IWICBitmapDecoder_iface;
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LONG ref;
BOOL initialized;
GifFileType *gif;
CRITICAL_SECTION lock;
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} GifDecoder;
typedef struct {
IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
LONG ref;
SavedImage *frame;
GifDecoder *parent;
} GifFrameDecode;
static inline GifDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
{
return CONTAINING_RECORD(iface, GifDecoder, IWICBitmapDecoder_iface);
}
static inline GifFrameDecode *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, GifFrameDecode, IWICBitmapFrameDecode_iface);
}
static HRESULT WINAPI GifFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
GifFrameDecode *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 GifFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI GifFrameDecode_Release(IWICBitmapFrameDecode *iface)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(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);
}
return ref;
}
static HRESULT WINAPI GifFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
*puiWidth = This->frame->ImageDesc.Width;
*puiHeight = This->frame->ImageDesc.Height;
return S_OK;
}
static HRESULT WINAPI GifFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
WICPixelFormatGUID *pPixelFormat)
{
memcpy(pPixelFormat, &GUID_WICPixelFormat8bppIndexed, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI GifFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
double *pDpiX, double *pDpiY)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
const GifWord aspect_word = This->parent->gif->SAspectRatio;
const double aspect = (aspect_word > 0) ? ((aspect_word + 15.0) / 64.0) : 1.0;
TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
*pDpiX = 96.0 / aspect;
*pDpiY = 96.0;
return S_OK;
}
static HRESULT WINAPI GifFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
WICColor colors[256];
ColorMapObject *cm = This->frame->ImageDesc.ColorMap;
int i, trans;
ExtensionBlock *eb;
TRACE("(%p,%p)\n", iface, pIPalette);
if (!cm) cm = This->parent->gif->SColorMap;
if (cm->ColorCount > 256)
{
ERR("GIF contains %i colors???\n", cm->ColorCount);
return E_FAIL;
}
for (i = 0; i < cm->ColorCount; i++) {
colors[i] = 0xff000000| /* alpha */
cm->Colors[i].Red << 16|
cm->Colors[i].Green << 8|
cm->Colors[i].Blue;
}
/* look for the transparent color extension */
for (i = 0; i < This->frame->ExtensionBlockCount; ++i) {
eb = This->frame->ExtensionBlocks + i;
if (eb->Function == 0xF9 && eb->ByteCount == 4) {
if ((eb->Bytes[0] & 1) == 1) {
trans = (unsigned char)eb->Bytes[3];
colors[trans] &= 0xffffff; /* set alpha to 0 */
break;
}
}
}
IWICPalette_InitializeCustom(pIPalette, colors, cm->ColorCount);
return S_OK;
}
static HRESULT copy_interlaced_pixels(const BYTE *srcbuffer,
UINT srcwidth, UINT srcheight, INT srcstride, const WICRect *rc,
UINT dststride, UINT dstbuffersize, BYTE *dstbuffer)
{
UINT row_offset; /* number of bytes into the source rows where the data starts */
const BYTE *src;
BYTE *dst;
UINT y;
WICRect rect;
if (!rc)
{
rect.X = 0;
rect.Y = 0;
rect.Width = srcwidth;
rect.Height = srcheight;
rc = &rect;
}
else
{
if (rc->X < 0 || rc->Y < 0 || rc->X+rc->Width > srcwidth || rc->Y+rc->Height > srcheight)
return E_INVALIDARG;
}
if (dststride < rc->Width)
return E_INVALIDARG;
if ((dststride * rc->Height) > dstbuffersize)
return E_INVALIDARG;
row_offset = rc->X;
dst = dstbuffer;
for (y=rc->Y; y-rc->Y < rc->Height; y++)
{
if (y%8 == 0)
src = srcbuffer + srcstride * (y/8);
else if (y%4 == 0)
src = srcbuffer + srcstride * ((srcheight+7)/8 + y/8);
else if (y%2 == 0)
src = srcbuffer + srcstride * ((srcheight+3)/4 + y/4);
else /* y%2 == 1 */
src = srcbuffer + srcstride * ((srcheight+1)/2 + y/2);
src += row_offset;
memcpy(dst, src, rc->Width);
dst += dststride;
}
return S_OK;
}
static HRESULT WINAPI GifFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
if (This->frame->ImageDesc.Interlace)
{
return copy_interlaced_pixels(This->frame->RasterBits, This->frame->ImageDesc.Width,
This->frame->ImageDesc.Height, This->frame->ImageDesc.Width,
prc, cbStride, cbBufferSize, pbBuffer);
}
else
{
return copy_pixels(8, This->frame->RasterBits, This->frame->ImageDesc.Width,
This->frame->ImageDesc.Height, This->frame->ImageDesc.Width,
prc, cbStride, cbBufferSize, pbBuffer);
}
}
static HRESULT WINAPI GifFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI GifFrameDecode_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 GifFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static const IWICBitmapFrameDecodeVtbl GifFrameDecode_Vtbl = {
GifFrameDecode_QueryInterface,
GifFrameDecode_AddRef,
GifFrameDecode_Release,
GifFrameDecode_GetSize,
GifFrameDecode_GetPixelFormat,
GifFrameDecode_GetResolution,
GifFrameDecode_CopyPalette,
GifFrameDecode_CopyPixels,
GifFrameDecode_GetMetadataQueryReader,
GifFrameDecode_GetColorContexts,
GifFrameDecode_GetThumbnail
};
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static HRESULT WINAPI GifDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
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TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapDecoder, iid))
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{
*ppv = &This->IWICBitmapDecoder_iface;
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}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI GifDecoder_AddRef(IWICBitmapDecoder *iface)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
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ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI GifDecoder_Release(IWICBitmapDecoder *iface)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
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ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
DGifCloseFile(This->gif);
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HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI GifDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
DWORD *pdwCapability)
{
FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
return E_NOTIMPL;
}
static int _gif_inputfunc(GifFileType *gif, GifByteType *data, int len) {
IStream *stream = gif->UserData;
ULONG bytesread;
HRESULT hr;
if (!stream)
{
ERR("attempting to read file after initialization\n");
return 0;
}
hr = IStream_Read(stream, data, len, &bytesread);
if (hr != S_OK) bytesread = 0;
return bytesread;
}
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static HRESULT WINAPI GifDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
LARGE_INTEGER seek;
int ret;
TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
if (This->initialized || This->gif)
{
WARN("already initialized\n");
LeaveCriticalSection(&This->lock);
return WINCODEC_ERR_WRONGSTATE;
}
/* seek to start of stream */
seek.QuadPart = 0;
IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
/* read all data from the stream */
This->gif = DGifOpen((void*)pIStream, _gif_inputfunc);
if (!This->gif)
{
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
ret = DGifSlurp(This->gif);
if (ret == GIF_ERROR)
{
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
/* make sure we don't use the stream after this method returns */
This->gif->UserData = NULL;
This->initialized = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
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}
static HRESULT WINAPI GifDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatGif, sizeof(GUID));
return S_OK;
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}
static HRESULT WINAPI GifDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
HRESULT hr;
IWICComponentInfo *compinfo;
TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
hr = CreateComponentInfo(&CLSID_WICGifDecoder, &compinfo);
if (FAILED(hr)) return hr;
hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
(void**)ppIDecoderInfo);
IWICComponentInfo_Release(compinfo);
return hr;
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}
static HRESULT WINAPI GifDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static HRESULT WINAPI GifDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI GifDecoder_GetPreview(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIBitmapSource)
{
TRACE("(%p,%p)\n", iface, ppIBitmapSource);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI GifDecoder_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 GifDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT WINAPI GifDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%p)\n", iface, pCount);
if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
*pCount = This->gif->ImageCount;
TRACE("<- %u\n", *pCount);
return S_OK;
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}
static HRESULT WINAPI GifDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
GifFrameDecode *result;
TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
if (index >= This->gif->ImageCount) return E_INVALIDARG;
result = HeapAlloc(GetProcessHeap(), 0, sizeof(GifFrameDecode));
if (!result) return E_OUTOFMEMORY;
result->IWICBitmapFrameDecode_iface.lpVtbl = &GifFrameDecode_Vtbl;
result->ref = 1;
result->frame = &This->gif->SavedImages[index];
IWICBitmapDecoder_AddRef(iface);
result->parent = This;
*ppIBitmapFrame = &result->IWICBitmapFrameDecode_iface;
return S_OK;
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}
static const IWICBitmapDecoderVtbl GifDecoder_Vtbl = {
GifDecoder_QueryInterface,
GifDecoder_AddRef,
GifDecoder_Release,
GifDecoder_QueryCapability,
GifDecoder_Initialize,
GifDecoder_GetContainerFormat,
GifDecoder_GetDecoderInfo,
GifDecoder_CopyPalette,
GifDecoder_GetMetadataQueryReader,
GifDecoder_GetPreview,
GifDecoder_GetColorContexts,
GifDecoder_GetThumbnail,
GifDecoder_GetFrameCount,
GifDecoder_GetFrame
};
HRESULT GifDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
GifDecoder *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(GifDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &GifDecoder_Vtbl;
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This->ref = 1;
This->initialized = FALSE;
This->gif = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": GifDecoder.lock");
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ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
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return ret;
}