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reactos/dll/win32/windowscodecs/gifformat.c

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/*
* Copyright 2009 Vincent Povirk for CodeWeavers
* Copyright 2012,2016 Dmitry Timoshkov
*
* 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 "wincodecs_private.h"
#include <ole2.h>
#include "ungif.h"
#include "pshpack1.h"
struct logical_screen_descriptor
{
char signature[6];
USHORT width;
USHORT height;
BYTE packed;
/* global_color_table_flag : 1;
* color_resolution : 3;
* sort_flag : 1;
* global_color_table_size : 3;
*/
BYTE background_color_index;
BYTE pixel_aspect_ratio;
};
struct image_descriptor
{
USHORT left;
USHORT top;
USHORT width;
USHORT height;
BYTE packed;
/* local_color_table_flag : 1;
* interlace_flag : 1;
* sort_flag : 1;
* reserved : 2;
* local_color_table_size : 3;
*/
};
#include "poppack.h"
static LPWSTR strdupAtoW(const char *src)
{
int len = MultiByteToWideChar(CP_ACP, 0, src, -1, NULL, 0);
LPWSTR dst = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
if (dst) MultiByteToWideChar(CP_ACP, 0, src, -1, dst, len);
return dst;
}
static HRESULT load_LSD_metadata(IStream *stream, const GUID *vendor, DWORD options,
MetadataItem **items, DWORD *count)
{
struct logical_screen_descriptor lsd_data;
HRESULT hr;
ULONG bytesread, i;
MetadataItem *result;
*items = NULL;
*count = 0;
hr = IStream_Read(stream, &lsd_data, sizeof(lsd_data), &bytesread);
if (FAILED(hr) || bytesread != sizeof(lsd_data)) return S_OK;
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem) * 9);
if (!result) return E_OUTOFMEMORY;
for (i = 0; i < 9; i++)
{
PropVariantInit(&result[i].schema);
PropVariantInit(&result[i].id);
PropVariantInit(&result[i].value);
}
result[0].id.vt = VT_LPWSTR;
result[0].id.u.pwszVal = strdupAtoW("Signature");
result[0].value.vt = VT_UI1|VT_VECTOR;
result[0].value.u.caub.cElems = sizeof(lsd_data.signature);
result[0].value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, sizeof(lsd_data.signature));
memcpy(result[0].value.u.caub.pElems, lsd_data.signature, sizeof(lsd_data.signature));
result[1].id.vt = VT_LPWSTR;
result[1].id.u.pwszVal = strdupAtoW("Width");
result[1].value.vt = VT_UI2;
result[1].value.u.uiVal = lsd_data.width;
result[2].id.vt = VT_LPWSTR;
result[2].id.u.pwszVal = strdupAtoW("Height");
result[2].value.vt = VT_UI2;
result[2].value.u.uiVal = lsd_data.height;
result[3].id.vt = VT_LPWSTR;
result[3].id.u.pwszVal = strdupAtoW("GlobalColorTableFlag");
result[3].value.vt = VT_BOOL;
result[3].value.u.boolVal = (lsd_data.packed >> 7) & 1;
result[4].id.vt = VT_LPWSTR;
result[4].id.u.pwszVal = strdupAtoW("ColorResolution");
result[4].value.vt = VT_UI1;
result[4].value.u.bVal = (lsd_data.packed >> 4) & 7;
result[5].id.vt = VT_LPWSTR;
result[5].id.u.pwszVal = strdupAtoW("SortFlag");
result[5].value.vt = VT_BOOL;
result[5].value.u.boolVal = (lsd_data.packed >> 3) & 1;
result[6].id.vt = VT_LPWSTR;
result[6].id.u.pwszVal = strdupAtoW("GlobalColorTableSize");
result[6].value.vt = VT_UI1;
result[6].value.u.bVal = lsd_data.packed & 7;
result[7].id.vt = VT_LPWSTR;
result[7].id.u.pwszVal = strdupAtoW("BackgroundColorIndex");
result[7].value.vt = VT_UI1;
result[7].value.u.bVal = lsd_data.background_color_index;
result[8].id.vt = VT_LPWSTR;
result[8].id.u.pwszVal = strdupAtoW("PixelAspectRatio");
result[8].value.vt = VT_UI1;
result[8].value.u.bVal = lsd_data.pixel_aspect_ratio;
*items = result;
*count = 9;
return S_OK;
}
static const MetadataHandlerVtbl LSDReader_Vtbl = {
0,
&CLSID_WICLSDMetadataReader,
load_LSD_metadata
};
HRESULT LSDReader_CreateInstance(REFIID iid, void **ppv)
{
return MetadataReader_Create(&LSDReader_Vtbl, iid, ppv);
}
static HRESULT load_IMD_metadata(IStream *stream, const GUID *vendor, DWORD options,
MetadataItem **items, DWORD *count)
{
struct image_descriptor imd_data;
HRESULT hr;
ULONG bytesread, i;
MetadataItem *result;
*items = NULL;
*count = 0;
hr = IStream_Read(stream, &imd_data, sizeof(imd_data), &bytesread);
if (FAILED(hr) || bytesread != sizeof(imd_data)) return S_OK;
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem) * 8);
if (!result) return E_OUTOFMEMORY;
for (i = 0; i < 8; i++)
{
PropVariantInit(&result[i].schema);
PropVariantInit(&result[i].id);
PropVariantInit(&result[i].value);
}
result[0].id.vt = VT_LPWSTR;
result[0].id.u.pwszVal = strdupAtoW("Left");
result[0].value.vt = VT_UI2;
result[0].value.u.uiVal = imd_data.left;
result[1].id.vt = VT_LPWSTR;
result[1].id.u.pwszVal = strdupAtoW("Top");
result[1].value.vt = VT_UI2;
result[1].value.u.uiVal = imd_data.top;
result[2].id.vt = VT_LPWSTR;
result[2].id.u.pwszVal = strdupAtoW("Width");
result[2].value.vt = VT_UI2;
result[2].value.u.uiVal = imd_data.width;
result[3].id.vt = VT_LPWSTR;
result[3].id.u.pwszVal = strdupAtoW("Height");
result[3].value.vt = VT_UI2;
result[3].value.u.uiVal = imd_data.height;
result[4].id.vt = VT_LPWSTR;
result[4].id.u.pwszVal = strdupAtoW("LocalColorTableFlag");
result[4].value.vt = VT_BOOL;
result[4].value.u.boolVal = (imd_data.packed >> 7) & 1;
result[5].id.vt = VT_LPWSTR;
result[5].id.u.pwszVal = strdupAtoW("InterlaceFlag");
result[5].value.vt = VT_BOOL;
result[5].value.u.boolVal = (imd_data.packed >> 6) & 1;
result[6].id.vt = VT_LPWSTR;
result[6].id.u.pwszVal = strdupAtoW("SortFlag");
result[6].value.vt = VT_BOOL;
result[6].value.u.boolVal = (imd_data.packed >> 5) & 1;
result[7].id.vt = VT_LPWSTR;
result[7].id.u.pwszVal = strdupAtoW("LocalColorTableSize");
result[7].value.vt = VT_UI1;
result[7].value.u.bVal = imd_data.packed & 7;
*items = result;
*count = 8;
return S_OK;
}
static const MetadataHandlerVtbl IMDReader_Vtbl = {
0,
&CLSID_WICIMDMetadataReader,
load_IMD_metadata
};
HRESULT IMDReader_CreateInstance(REFIID iid, void **ppv)
{
return MetadataReader_Create(&IMDReader_Vtbl, iid, ppv);
}
static HRESULT load_GCE_metadata(IStream *stream, const GUID *vendor, DWORD options,
MetadataItem **items, DWORD *count)
{
#include "pshpack1.h"
struct graphic_control_extension
{
BYTE packed;
/* reservred: 3;
* disposal : 3;
* user_input_flag : 1;
* transparency_flag : 1;
*/
USHORT delay;
BYTE transparent_color_index;
} gce_data;
#include "poppack.h"
HRESULT hr;
ULONG bytesread, i;
MetadataItem *result;
*items = NULL;
*count = 0;
hr = IStream_Read(stream, &gce_data, sizeof(gce_data), &bytesread);
if (FAILED(hr) || bytesread != sizeof(gce_data)) return S_OK;
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem) * 5);
if (!result) return E_OUTOFMEMORY;
for (i = 0; i < 5; i++)
{
PropVariantInit(&result[i].schema);
PropVariantInit(&result[i].id);
PropVariantInit(&result[i].value);
}
result[0].id.vt = VT_LPWSTR;
result[0].id.u.pwszVal = strdupAtoW("Disposal");
result[0].value.vt = VT_UI1;
result[0].value.u.bVal = (gce_data.packed >> 2) & 7;
result[1].id.vt = VT_LPWSTR;
result[1].id.u.pwszVal = strdupAtoW("UserInputFlag");
result[1].value.vt = VT_BOOL;
result[1].value.u.boolVal = (gce_data.packed >> 1) & 1;
result[2].id.vt = VT_LPWSTR;
result[2].id.u.pwszVal = strdupAtoW("TransparencyFlag");
result[2].value.vt = VT_BOOL;
result[2].value.u.boolVal = gce_data.packed & 1;
result[3].id.vt = VT_LPWSTR;
result[3].id.u.pwszVal = strdupAtoW("Delay");
result[3].value.vt = VT_UI2;
result[3].value.u.uiVal = gce_data.delay;
result[4].id.vt = VT_LPWSTR;
result[4].id.u.pwszVal = strdupAtoW("TransparentColorIndex");
result[4].value.vt = VT_UI1;
result[4].value.u.bVal = gce_data.transparent_color_index;
*items = result;
*count = 5;
return S_OK;
}
static const MetadataHandlerVtbl GCEReader_Vtbl = {
0,
&CLSID_WICGCEMetadataReader,
load_GCE_metadata
};
HRESULT GCEReader_CreateInstance(REFIID iid, void **ppv)
{
return MetadataReader_Create(&GCEReader_Vtbl, iid, ppv);
}
static HRESULT load_APE_metadata(IStream *stream, const GUID *vendor, DWORD options,
MetadataItem **items, DWORD *count)
{
#include "pshpack1.h"
struct application_extension
{
BYTE extension_introducer;
BYTE extension_label;
BYTE block_size;
BYTE application[11];
} ape_data;
#include "poppack.h"
HRESULT hr;
ULONG bytesread, data_size, i;
MetadataItem *result;
BYTE subblock_size;
BYTE *data;
*items = NULL;
*count = 0;
hr = IStream_Read(stream, &ape_data, sizeof(ape_data), &bytesread);
if (FAILED(hr) || bytesread != sizeof(ape_data)) return S_OK;
if (ape_data.extension_introducer != 0x21 ||
ape_data.extension_label != APPLICATION_EXT_FUNC_CODE ||
ape_data.block_size != 11)
return S_OK;
data = NULL;
data_size = 0;
for (;;)
{
hr = IStream_Read(stream, &subblock_size, sizeof(subblock_size), &bytesread);
if (FAILED(hr) || bytesread != sizeof(subblock_size))
{
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
if (!subblock_size) break;
if (!data)
data = HeapAlloc(GetProcessHeap(), 0, subblock_size + 1);
else
{
BYTE *new_data = HeapReAlloc(GetProcessHeap(), 0, data, data_size + subblock_size + 1);
if (!new_data)
{
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
data = new_data;
}
data[data_size] = subblock_size;
hr = IStream_Read(stream, data + data_size + 1, subblock_size, &bytesread);
if (FAILED(hr) || bytesread != subblock_size)
{
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
data_size += subblock_size + 1;
}
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem) * 2);
if (!result)
{
HeapFree(GetProcessHeap(), 0, data);
return E_OUTOFMEMORY;
}
for (i = 0; i < 2; i++)
{
PropVariantInit(&result[i].schema);
PropVariantInit(&result[i].id);
PropVariantInit(&result[i].value);
}
result[0].id.vt = VT_LPWSTR;
result[0].id.u.pwszVal = strdupAtoW("Application");
result[0].value.vt = VT_UI1|VT_VECTOR;
result[0].value.u.caub.cElems = sizeof(ape_data.application);
result[0].value.u.caub.pElems = HeapAlloc(GetProcessHeap(), 0, sizeof(ape_data.application));
memcpy(result[0].value.u.caub.pElems, ape_data.application, sizeof(ape_data.application));
result[1].id.vt = VT_LPWSTR;
result[1].id.u.pwszVal = strdupAtoW("Data");
result[1].value.vt = VT_UI1|VT_VECTOR;
result[1].value.u.caub.cElems = data_size;
result[1].value.u.caub.pElems = data;
*items = result;
*count = 2;
return S_OK;
}
static const MetadataHandlerVtbl APEReader_Vtbl = {
0,
&CLSID_WICAPEMetadataReader,
load_APE_metadata
};
HRESULT APEReader_CreateInstance(REFIID iid, void **ppv)
{
return MetadataReader_Create(&APEReader_Vtbl, iid, ppv);
}
static HRESULT load_GifComment_metadata(IStream *stream, const GUID *vendor, DWORD options,
MetadataItem **items, DWORD *count)
{
#include "pshpack1.h"
struct gif_extension
{
BYTE extension_introducer;
BYTE extension_label;
} ext_data;
#include "poppack.h"
HRESULT hr;
ULONG bytesread, data_size;
MetadataItem *result;
BYTE subblock_size;
char *data;
*items = NULL;
*count = 0;
hr = IStream_Read(stream, &ext_data, sizeof(ext_data), &bytesread);
if (FAILED(hr) || bytesread != sizeof(ext_data)) return S_OK;
if (ext_data.extension_introducer != 0x21 ||
ext_data.extension_label != COMMENT_EXT_FUNC_CODE)
return S_OK;
data = NULL;
data_size = 0;
for (;;)
{
hr = IStream_Read(stream, &subblock_size, sizeof(subblock_size), &bytesread);
if (FAILED(hr) || bytesread != sizeof(subblock_size))
{
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
if (!subblock_size) break;
if (!data)
data = HeapAlloc(GetProcessHeap(), 0, subblock_size + 1);
else
{
char *new_data = HeapReAlloc(GetProcessHeap(), 0, data, data_size + subblock_size + 1);
if (!new_data)
{
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
data = new_data;
}
hr = IStream_Read(stream, data + data_size, subblock_size, &bytesread);
if (FAILED(hr) || bytesread != subblock_size)
{
HeapFree(GetProcessHeap(), 0, data);
return S_OK;
}
data_size += subblock_size;
}
data[data_size] = 0;
result = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MetadataItem));
if (!result)
{
HeapFree(GetProcessHeap(), 0, data);
return E_OUTOFMEMORY;
}
PropVariantInit(&result->schema);
PropVariantInit(&result->id);
PropVariantInit(&result->value);
result->id.vt = VT_LPWSTR;
result->id.u.pwszVal = strdupAtoW("TextEntry");
result->value.vt = VT_LPSTR;
result->value.u.pszVal = data;
*items = result;
*count = 1;
return S_OK;
}
static const MetadataHandlerVtbl GifCommentReader_Vtbl = {
0,
&CLSID_WICGifCommentMetadataReader,
load_GifComment_metadata
};
HRESULT GifCommentReader_CreateInstance(REFIID iid, void **ppv)
{
return MetadataReader_Create(&GifCommentReader_Vtbl, iid, ppv);
}
static IStream *create_stream(const void *data, int data_size)
{
HRESULT hr;
IStream *stream;
HGLOBAL hdata;
void *locked_data;
hdata = GlobalAlloc(GMEM_MOVEABLE, data_size);
if (!hdata) return NULL;
locked_data = GlobalLock(hdata);
memcpy(locked_data, data, data_size);
GlobalUnlock(hdata);
hr = CreateStreamOnHGlobal(hdata, TRUE, &stream);
return FAILED(hr) ? NULL : stream;
}
static HRESULT create_metadata_reader(const void *data, int data_size,
class_constructor constructor,
IWICMetadataReader **reader)
{
HRESULT hr;
IWICMetadataReader *metadata_reader;
IWICPersistStream *persist;
IStream *stream;
/* FIXME: Use IWICComponentFactory_CreateMetadataReader once it's implemented */
hr = constructor(&IID_IWICMetadataReader, (void**)&metadata_reader);
if (FAILED(hr)) return hr;
hr = IWICMetadataReader_QueryInterface(metadata_reader, &IID_IWICPersistStream, (void **)&persist);
if (FAILED(hr))
{
IWICMetadataReader_Release(metadata_reader);
return hr;
}
stream = create_stream(data, data_size);
IWICPersistStream_LoadEx(persist, stream, NULL, WICPersistOptionDefault);
IStream_Release(stream);
IWICPersistStream_Release(persist);
*reader = metadata_reader;
return S_OK;
}
typedef struct {
IWICBitmapDecoder IWICBitmapDecoder_iface;
IWICMetadataBlockReader IWICMetadataBlockReader_iface;
IStream *stream;
BYTE LSD_data[13]; /* Logical Screen Descriptor */
LONG ref;
BOOL initialized;
GifFileType *gif;
UINT current_frame;
CRITICAL_SECTION lock;
} GifDecoder;
typedef struct {
IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
IWICMetadataBlockReader IWICMetadataBlockReader_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 GifDecoder *impl_from_IWICMetadataBlockReader(IWICMetadataBlockReader *iface)
{
return CONTAINING_RECORD(iface, GifDecoder, IWICMetadataBlockReader_iface);
}
static inline GifFrameDecode *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, GifFrameDecode, IWICBitmapFrameDecode_iface);
}
static inline GifFrameDecode *frame_from_IWICMetadataBlockReader(IWICMetadataBlockReader *iface)
{
return CONTAINING_RECORD(iface, GifFrameDecode, IWICMetadataBlockReader_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 if (IsEqualIID(&IID_IWICMetadataBlockReader, iid))
{
*ppv = &This->IWICMetadataBlockReader_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)
{
IWICBitmapDecoder_Release(&This->parent->IWICBitmapDecoder_iface);
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->Extensions.ExtensionBlockCount; ++i) {
eb = This->frame->Extensions.ExtensionBlocks + i;
if (eb->Function == GRAPHICS_EXT_FUNC_CODE && eb->ByteCount == 8) {
if (eb->Bytes[3] & 1) {
trans = (unsigned char)eb->Bytes[6];
colors[trans] &= 0xffffff; /* set alpha to 0 */
break;
}
}
}
return IWICPalette_InitializeCustom(pIPalette, colors, cm->ColorCount);
}
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)
{
GifFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
if (!ppIMetadataQueryReader)
return E_INVALIDARG;
return MetadataQueryReader_CreateInstance(&This->IWICMetadataBlockReader_iface, NULL, ppIMetadataQueryReader);
}
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
};
static HRESULT WINAPI GifFrameDecode_Block_QueryInterface(IWICMetadataBlockReader *iface,
REFIID iid, void **ppv)
{
GifFrameDecode *This = frame_from_IWICMetadataBlockReader(iface);
return IWICBitmapFrameDecode_QueryInterface(&This->IWICBitmapFrameDecode_iface, iid, ppv);
}
static ULONG WINAPI GifFrameDecode_Block_AddRef(IWICMetadataBlockReader *iface)
{
GifFrameDecode *This = frame_from_IWICMetadataBlockReader(iface);
return IWICBitmapFrameDecode_AddRef(&This->IWICBitmapFrameDecode_iface);
}
static ULONG WINAPI GifFrameDecode_Block_Release(IWICMetadataBlockReader *iface)
{
GifFrameDecode *This = frame_from_IWICMetadataBlockReader(iface);
return IWICBitmapFrameDecode_Release(&This->IWICBitmapFrameDecode_iface);
}
static HRESULT WINAPI GifFrameDecode_Block_GetContainerFormat(IWICMetadataBlockReader *iface,
GUID *guid)
{
TRACE("(%p,%p)\n", iface, guid);
if (!guid) return E_INVALIDARG;
*guid = GUID_ContainerFormatGif;
return S_OK;
}
static HRESULT WINAPI GifFrameDecode_Block_GetCount(IWICMetadataBlockReader *iface,
UINT *count)
{
GifFrameDecode *This = frame_from_IWICMetadataBlockReader(iface);
TRACE("%p,%p\n", iface, count);
if (!count) return E_INVALIDARG;
*count = This->frame->Extensions.ExtensionBlockCount + 1;
return S_OK;
}
static HRESULT create_IMD_metadata_reader(GifFrameDecode *This, IWICMetadataReader **reader)
{
HRESULT hr;
IWICMetadataReader *metadata_reader;
IWICPersistStream *persist;
IStream *stream;
struct image_descriptor IMD_data;
/* FIXME: Use IWICComponentFactory_CreateMetadataReader once it's implemented */
hr = IMDReader_CreateInstance(&IID_IWICMetadataReader, (void **)&metadata_reader);
if (FAILED(hr)) return hr;
hr = IWICMetadataReader_QueryInterface(metadata_reader, &IID_IWICPersistStream, (void **)&persist);
if (FAILED(hr))
{
IWICMetadataReader_Release(metadata_reader);
return hr;
}
/* recreate IMD structure from GIF decoder data */
IMD_data.left = This->frame->ImageDesc.Left;
IMD_data.top = This->frame->ImageDesc.Top;
IMD_data.width = This->frame->ImageDesc.Width;
IMD_data.height = This->frame->ImageDesc.Height;
IMD_data.packed = 0;
/* interlace_flag */
IMD_data.packed |= This->frame->ImageDesc.Interlace ? (1 << 6) : 0;
if (This->frame->ImageDesc.ColorMap)
{
/* local_color_table_flag */
IMD_data.packed |= 1 << 7;
/* local_color_table_size */
IMD_data.packed |= This->frame->ImageDesc.ColorMap->BitsPerPixel - 1;
/* sort_flag */
IMD_data.packed |= This->frame->ImageDesc.ColorMap->SortFlag ? 0x20 : 0;
}
stream = create_stream(&IMD_data, sizeof(IMD_data));
IWICPersistStream_LoadEx(persist, stream, NULL, WICPersistOptionDefault);
IStream_Release(stream);
IWICPersistStream_Release(persist);
*reader = metadata_reader;
return S_OK;
}
static HRESULT WINAPI GifFrameDecode_Block_GetReaderByIndex(IWICMetadataBlockReader *iface,
UINT index, IWICMetadataReader **reader)
{
GifFrameDecode *This = frame_from_IWICMetadataBlockReader(iface);
int i, gce_index = -1, gce_skipped = 0;
TRACE("(%p,%u,%p)\n", iface, index, reader);
if (!reader) return E_INVALIDARG;
if (index == 0)
return create_IMD_metadata_reader(This, reader);
if (index >= This->frame->Extensions.ExtensionBlockCount + 1)
return E_INVALIDARG;
for (i = 0; i < This->frame->Extensions.ExtensionBlockCount; i++)
{
class_constructor constructor;
const void *data;
int data_size;
if (index != i + 1 - gce_skipped) continue;
if (This->frame->Extensions.ExtensionBlocks[i].Function == GRAPHICS_EXT_FUNC_CODE)
{
gce_index = i;
gce_skipped = 1;
continue;
}
else if (This->frame->Extensions.ExtensionBlocks[i].Function == COMMENT_EXT_FUNC_CODE)
{
constructor = GifCommentReader_CreateInstance;
data = This->frame->Extensions.ExtensionBlocks[i].Bytes;
data_size = This->frame->Extensions.ExtensionBlocks[i].ByteCount;
}
else
{
constructor = UnknownMetadataReader_CreateInstance;
data = This->frame->Extensions.ExtensionBlocks[i].Bytes;
data_size = This->frame->Extensions.ExtensionBlocks[i].ByteCount;
}
return create_metadata_reader(data, data_size, constructor, reader);
}
if (gce_index == -1) return E_INVALIDARG;
return create_metadata_reader(This->frame->Extensions.ExtensionBlocks[gce_index].Bytes + 3,
This->frame->Extensions.ExtensionBlocks[gce_index].ByteCount - 4,
GCEReader_CreateInstance, reader);
}
static HRESULT WINAPI GifFrameDecode_Block_GetEnumerator(IWICMetadataBlockReader *iface,
IEnumUnknown **enumerator)
{
FIXME("(%p,%p): stub\n", iface, enumerator);
return E_NOTIMPL;
}
static const IWICMetadataBlockReaderVtbl GifFrameDecode_BlockVtbl =
{
GifFrameDecode_Block_QueryInterface,
GifFrameDecode_Block_AddRef,
GifFrameDecode_Block_Release,
GifFrameDecode_Block_GetContainerFormat,
GifFrameDecode_Block_GetCount,
GifFrameDecode_Block_GetReaderByIndex,
GifFrameDecode_Block_GetEnumerator
};
static HRESULT WINAPI GifDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
GifDecoder *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 if (IsEqualIID(&IID_IWICMetadataBlockReader, iid))
{
*ppv = &This->IWICMetadataBlockReader_iface;
}
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);
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);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->stream)
{
IStream_Release(This->stream);
DGifCloseFile(This->gif);
}
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI GifDecoder_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 |
WICBitmapDecoderCapabilityCanDecodeSomeImages |
WICBitmapDecoderCapabilityCanEnumerateMetadata;
return S_OK;
}
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 (FAILED(hr)) bytesread = 0;
return bytesread;
}
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;
seek.QuadPart = 0;
IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
IStream_Read(pIStream, This->LSD_data, sizeof(This->LSD_data), NULL);
This->stream = pIStream;
IStream_AddRef(This->stream);
This->initialized = TRUE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI GifDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatGif, sizeof(GUID));
return S_OK;
}
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;
}
static HRESULT WINAPI GifDecoder_CopyPalette(IWICBitmapDecoder *iface, IWICPalette *palette)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
WICColor colors[256];
ColorMapObject *cm;
int i, trans, count;
ExtensionBlock *eb;
TRACE("(%p,%p)\n", iface, palette);
if (!This->gif)
return WINCODEC_ERR_WRONGSTATE;
cm = This->gif->SColorMap;
if (cm)
{
if (cm->ColorCount > 256)
{
ERR("GIF contains invalid number of colors: %d\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;
}
count = cm->ColorCount;
}
else
{
colors[0] = 0xff000000;
colors[1] = 0xffffffff;
for (i = 2; i < 256; i++)
colors[i] = 0xff000000;
count = 256;
}
/* look for the transparent color extension */
for (i = 0; i < This->gif->SavedImages[This->current_frame].Extensions.ExtensionBlockCount; i++)
{
eb = This->gif->SavedImages[This->current_frame].Extensions.ExtensionBlocks + i;
if (eb->Function == GRAPHICS_EXT_FUNC_CODE && eb->ByteCount == 8)
{
if (eb->Bytes[3] & 1)
{
trans = (unsigned char)eb->Bytes[6];
colors[trans] &= 0xffffff; /* set alpha to 0 */
break;
}
}
}
return IWICPalette_InitializeCustom(palette, colors, count);
}
static HRESULT WINAPI GifDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
if (!ppIMetadataQueryReader) return E_INVALIDARG;
return MetadataQueryReader_CreateInstance(&This->IWICMetadataBlockReader_iface, NULL, ppIMetadataQueryReader);
}
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);
if (!pCount) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
*pCount = This->gif ? This->gif->ImageCount : 0;
LeaveCriticalSection(&This->lock);
TRACE("(%p) <-- %d\n", iface, *pCount);
return S_OK;
}
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_FRAMEMISSING;
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->IWICMetadataBlockReader_iface.lpVtbl = &GifFrameDecode_BlockVtbl;
result->ref = 1;
result->frame = &This->gif->SavedImages[index];
IWICBitmapDecoder_AddRef(iface);
result->parent = This;
This->current_frame = index;
*ppIBitmapFrame = &result->IWICBitmapFrameDecode_iface;
return S_OK;
}
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
};
static HRESULT WINAPI GifDecoder_Block_QueryInterface(IWICMetadataBlockReader *iface,
REFIID iid, void **ppv)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
}
static ULONG WINAPI GifDecoder_Block_AddRef(IWICMetadataBlockReader *iface)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
}
static ULONG WINAPI GifDecoder_Block_Release(IWICMetadataBlockReader *iface)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
}
static HRESULT WINAPI GifDecoder_Block_GetContainerFormat(IWICMetadataBlockReader *iface,
GUID *guid)
{
TRACE("(%p,%p)\n", iface, guid);
if (!guid) return E_INVALIDARG;
*guid = GUID_ContainerFormatGif;
return S_OK;
}
static HRESULT WINAPI GifDecoder_Block_GetCount(IWICMetadataBlockReader *iface,
UINT *count)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
TRACE("%p,%p\n", iface, count);
if (!count) return E_INVALIDARG;
*count = This->gif->Extensions.ExtensionBlockCount + 1;
return S_OK;
}
static HRESULT WINAPI GifDecoder_Block_GetReaderByIndex(IWICMetadataBlockReader *iface,
UINT index, IWICMetadataReader **reader)
{
GifDecoder *This = impl_from_IWICMetadataBlockReader(iface);
int i;
TRACE("(%p,%u,%p)\n", iface, index, reader);
if (!reader) return E_INVALIDARG;
if (index == 0)
return create_metadata_reader(This->LSD_data, sizeof(This->LSD_data),
LSDReader_CreateInstance, reader);
for (i = 0; i < This->gif->Extensions.ExtensionBlockCount; i++)
{
class_constructor constructor;
if (index != i + 1) continue;
if (This->gif->Extensions.ExtensionBlocks[i].Function == APPLICATION_EXT_FUNC_CODE)
constructor = APEReader_CreateInstance;
else if (This->gif->Extensions.ExtensionBlocks[i].Function == COMMENT_EXT_FUNC_CODE)
constructor = GifCommentReader_CreateInstance;
else
constructor = UnknownMetadataReader_CreateInstance;
return create_metadata_reader(This->gif->Extensions.ExtensionBlocks[i].Bytes,
This->gif->Extensions.ExtensionBlocks[i].ByteCount,
constructor, reader);
}
return E_INVALIDARG;
}
static HRESULT WINAPI GifDecoder_Block_GetEnumerator(IWICMetadataBlockReader *iface,
IEnumUnknown **enumerator)
{
FIXME("(%p,%p): stub\n", iface, enumerator);
return E_NOTIMPL;
}
static const IWICMetadataBlockReaderVtbl GifDecoder_BlockVtbl =
{
GifDecoder_Block_QueryInterface,
GifDecoder_Block_AddRef,
GifDecoder_Block_Release,
GifDecoder_Block_GetContainerFormat,
GifDecoder_Block_GetCount,
GifDecoder_Block_GetReaderByIndex,
GifDecoder_Block_GetEnumerator
};
HRESULT GifDecoder_CreateInstance(REFIID iid, void** ppv)
{
GifDecoder *This;
HRESULT ret;
TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
*ppv = NULL;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(GifDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &GifDecoder_Vtbl;
This->IWICMetadataBlockReader_iface.lpVtbl = &GifDecoder_BlockVtbl;
This->stream = NULL;
This->ref = 1;
This->initialized = FALSE;
This->gif = NULL;
This->current_frame = 0;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": GifDecoder.lock");
ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
return ret;
}
typedef struct GifEncoder
{
IWICBitmapEncoder IWICBitmapEncoder_iface;
LONG ref;
IStream *stream;
CRITICAL_SECTION lock;
BOOL initialized, info_written, committed;
UINT n_frames;
WICColor palette[256];
UINT colors;
} GifEncoder;
static inline GifEncoder *impl_from_IWICBitmapEncoder(IWICBitmapEncoder *iface)
{
return CONTAINING_RECORD(iface, GifEncoder, IWICBitmapEncoder_iface);
}
typedef struct GifFrameEncode
{
IWICBitmapFrameEncode IWICBitmapFrameEncode_iface;
LONG ref;
GifEncoder *encoder;
BOOL initialized, interlace, committed;
UINT width, height, lines;
double xres, yres;
WICColor palette[256];
UINT colors;
BYTE *image_data;
} GifFrameEncode;
static inline GifFrameEncode *impl_from_IWICBitmapFrameEncode(IWICBitmapFrameEncode *iface)
{
return CONTAINING_RECORD(iface, GifFrameEncode, IWICBitmapFrameEncode_iface);
}
static HRESULT WINAPI GifFrameEncode_QueryInterface(IWICBitmapFrameEncode *iface, REFIID iid, void **ppv)
{
TRACE("%p,%s,%p\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapFrameEncode, iid))
{
IWICBitmapFrameEncode_AddRef(iface);
*ppv = iface;
return S_OK;
}
*ppv = NULL;
return E_NOINTERFACE;
}
static ULONG WINAPI GifFrameEncode_AddRef(IWICBitmapFrameEncode *iface)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("%p -> %u\n", iface, ref);
return ref;
}
static ULONG WINAPI GifFrameEncode_Release(IWICBitmapFrameEncode *iface)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("%p -> %u\n", iface, ref);
if (!ref)
{
IWICBitmapEncoder_Release(&This->encoder->IWICBitmapEncoder_iface);
HeapFree(GetProcessHeap(), 0, This->image_data);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI GifFrameEncode_Initialize(IWICBitmapFrameEncode *iface, IPropertyBag2 *options)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%p\n", iface, options);
EnterCriticalSection(&This->encoder->lock);
if (!This->initialized)
{
This->initialized = TRUE;
hr = S_OK;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_SetSize(IWICBitmapFrameEncode *iface, UINT width, UINT height)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%u,%u\n", iface, width, height);
if (!width || !height) return E_INVALIDARG;
EnterCriticalSection(&This->encoder->lock);
if (This->initialized)
{
HeapFree(GetProcessHeap(), 0, This->image_data);
This->image_data = HeapAlloc(GetProcessHeap(), 0, width * height);
if (This->image_data)
{
This->width = width;
This->height = height;
hr = S_OK;
}
else
hr = E_OUTOFMEMORY;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_SetResolution(IWICBitmapFrameEncode *iface, double xres, double yres)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%f,%f\n", iface, xres, yres);
EnterCriticalSection(&This->encoder->lock);
if (This->initialized)
{
This->xres = xres;
This->yres = yres;
hr = S_OK;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_SetPixelFormat(IWICBitmapFrameEncode *iface, WICPixelFormatGUID *format)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%s\n", iface, debugstr_guid(format));
if (!format) return E_INVALIDARG;
EnterCriticalSection(&This->encoder->lock);
if (This->initialized)
{
*format = GUID_WICPixelFormat8bppIndexed;
hr = S_OK;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_SetColorContexts(IWICBitmapFrameEncode *iface, UINT count, IWICColorContext **context)
{
FIXME("%p,%u,%p: stub\n", iface, count, context);
return E_NOTIMPL;
}
static HRESULT WINAPI GifFrameEncode_SetPalette(IWICBitmapFrameEncode *iface, IWICPalette *palette)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%p\n", iface, palette);
if (!palette) return E_INVALIDARG;
EnterCriticalSection(&This->encoder->lock);
if (This->initialized)
hr = IWICPalette_GetColors(palette, 256, This->palette, &This->colors);
else
hr = WINCODEC_ERR_NOTINITIALIZED;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_SetThumbnail(IWICBitmapFrameEncode *iface, IWICBitmapSource *thumbnail)
{
FIXME("%p,%p: stub\n", iface, thumbnail);
return E_NOTIMPL;
}
static HRESULT WINAPI GifFrameEncode_WritePixels(IWICBitmapFrameEncode *iface, UINT lines, UINT stride, UINT size, BYTE *pixels)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%u,%u,%u,%p\n", iface, lines, stride, size, pixels);
if (!pixels) return E_INVALIDARG;
EnterCriticalSection(&This->encoder->lock);
if (This->initialized && This->image_data)
{
if (This->lines + lines <= This->height)
{
UINT i;
BYTE *src, *dst;
src = pixels;
dst = This->image_data + This->lines * This->width;
for (i = 0; i < lines; i++)
{
memcpy(dst, src, This->width);
src += stride;
dst += This->width;
}
This->lines += lines;
hr = S_OK;
}
else
hr = E_INVALIDARG;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_WriteSource(IWICBitmapFrameEncode *iface, IWICBitmapSource *source, WICRect *rc)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p,%p,%p\n", iface, source, rc);
if (!source) return E_INVALIDARG;
EnterCriticalSection(&This->encoder->lock);
if (This->initialized)
{
const GUID *format = &GUID_WICPixelFormat8bppIndexed;
hr = configure_write_source(iface, source, rc, format,
This->width, This->height, This->xres, This->yres);
if (hr == S_OK)
hr = write_source(iface, source, rc, format, 8, This->width, This->height);
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
#define LZW_DICT_SIZE (1 << 12)
struct lzw_dict
{
short prefix[LZW_DICT_SIZE];
unsigned char suffix[LZW_DICT_SIZE];
};
struct lzw_state
{
struct lzw_dict dict;
short init_code_bits, code_bits, next_code, clear_code, eof_code;
unsigned bits_buf;
int bits_count;
int (*user_write_data)(void *user_ptr, void *data, int length);
void *user_ptr;
};
struct input_stream
{
unsigned len;
const BYTE *in;
};
struct output_stream
{
struct
{
unsigned char len;
char data[255];
} gif_block;
IStream *out;
};
static int lzw_output_code(struct lzw_state *state, short code)
{
state->bits_buf |= code << state->bits_count;
state->bits_count += state->code_bits;
while (state->bits_count >= 8)
{
unsigned char byte = (unsigned char)state->bits_buf;
if (state->user_write_data(state->user_ptr, &byte, 1) != 1)
return 0;
state->bits_buf >>= 8;
state->bits_count -= 8;
}
return 1;
}
static inline int lzw_output_clear_code(struct lzw_state *state)
{
return lzw_output_code(state, state->clear_code);
}
static inline int lzw_output_eof_code(struct lzw_state *state)
{
return lzw_output_code(state, state->eof_code);
}
static int lzw_flush_bits(struct lzw_state *state)
{
unsigned char byte;
while (state->bits_count >= 8)
{
byte = (unsigned char)state->bits_buf;
if (state->user_write_data(state->user_ptr, &byte, 1) != 1)
return 0;
state->bits_buf >>= 8;
state->bits_count -= 8;
}
if (state->bits_count)
{
static const char mask[8] = { 0x00,0x01,0x03,0x07,0x0f,0x1f,0x3f,0x7f };
byte = (unsigned char)state->bits_buf & mask[state->bits_count];
if (state->user_write_data(state->user_ptr, &byte, 1) != 1)
return 0;
}
state->bits_buf = 0;
state->bits_count = 0;
return 1;
}
static void lzw_dict_reset(struct lzw_state *state)
{
int i;
state->code_bits = state->init_code_bits + 1;
state->next_code = (1 << state->init_code_bits) + 2;
for(i = 0; i < LZW_DICT_SIZE; i++)
{
state->dict.prefix[i] = 1 << 12; /* impossible LZW code value */
state->dict.suffix[i] = 0;
}
}
static void lzw_state_init(struct lzw_state *state, short init_code_bits, void *user_write_data, void *user_ptr)
{
state->init_code_bits = init_code_bits;
state->clear_code = 1 << init_code_bits;
state->eof_code = state->clear_code + 1;
state->bits_buf = 0;
state->bits_count = 0;
state->user_write_data = user_write_data;
state->user_ptr = user_ptr;
lzw_dict_reset(state);
}
static int lzw_dict_add(struct lzw_state *state, short prefix, unsigned char suffix)
{
if (state->next_code < LZW_DICT_SIZE)
{
state->dict.prefix[state->next_code] = prefix;
state->dict.suffix[state->next_code] = suffix;
if ((state->next_code & (state->next_code - 1)) == 0)
state->code_bits++;
state->next_code++;
return state->next_code;
}
return -1;
}
static short lzw_dict_lookup(const struct lzw_state *state, short prefix, unsigned char suffix)
{
short i;
for (i = 0; i < state->next_code; i++)
{
if (state->dict.prefix[i] == prefix && state->dict.suffix[i] == suffix)
return i;
}
return -1;
}
static inline int write_byte(struct output_stream *out, char byte)
{
if (out->gif_block.len == 255)
{
if (IStream_Write(out->out, &out->gif_block, sizeof(out->gif_block), NULL) != S_OK)
return 0;
out->gif_block.len = 0;
}
out->gif_block.data[out->gif_block.len++] = byte;
return 1;
}
static int write_data(void *user_ptr, void *user_data, int length)
{
unsigned char *data = user_data;
struct output_stream *out = user_ptr;
int len = length;
while (len-- > 0)
{
if (!write_byte(out, *data++)) return 0;
}
return length;
}
static int flush_output_data(void *user_ptr)
{
struct output_stream *out = user_ptr;
if (out->gif_block.len)
{
if (IStream_Write(out->out, &out->gif_block, out->gif_block.len + sizeof(out->gif_block.len), NULL) != S_OK)
return 0;
}
/* write GIF block terminator */
out->gif_block.len = 0;
return IStream_Write(out->out, &out->gif_block, sizeof(out->gif_block.len), NULL) == S_OK;
}
static inline int read_byte(struct input_stream *in, unsigned char *byte)
{
if (in->len)
{
in->len--;
*byte = *in->in++;
return 1;
}
return 0;
}
static HRESULT gif_compress(IStream *out_stream, const BYTE *in_data, ULONG in_size)
{
struct input_stream in;
struct output_stream out;
struct lzw_state state;
short init_code_bits, prefix, code;
unsigned char suffix;
in.in = in_data;
in.len = in_size;
out.gif_block.len = 0;
out.out = out_stream;
init_code_bits = suffix = 8;
if (IStream_Write(out.out, &suffix, sizeof(suffix), NULL) != S_OK)
return E_FAIL;
lzw_state_init(&state, init_code_bits, write_data, &out);
if (!lzw_output_clear_code(&state))
return E_FAIL;
if (read_byte(&in, &suffix))
{
prefix = suffix;
while (read_byte(&in, &suffix))
{
code = lzw_dict_lookup(&state, prefix, suffix);
if (code == -1)
{
if (!lzw_output_code(&state, prefix))
return E_FAIL;
if (lzw_dict_add(&state, prefix, suffix) == -1)
{
if (!lzw_output_clear_code(&state))
return E_FAIL;
lzw_dict_reset(&state);
}
prefix = suffix;
}
else
prefix = code;
}
if (!lzw_output_code(&state, prefix))
return E_FAIL;
if (!lzw_output_eof_code(&state))
return E_FAIL;
if (!lzw_flush_bits(&state))
return E_FAIL;
}
return flush_output_data(&out) ? S_OK : E_FAIL;
}
static HRESULT WINAPI GifFrameEncode_Commit(IWICBitmapFrameEncode *iface)
{
GifFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
HRESULT hr;
TRACE("%p\n", iface);
EnterCriticalSection(&This->encoder->lock);
if (This->image_data && This->lines == This->height && !This->committed)
{
BYTE gif_palette[256][3];
hr = S_OK;
if (!This->encoder->info_written)
{
struct logical_screen_descriptor lsd;
/* Logical Screen Descriptor */
memcpy(lsd.signature, "GIF89a", 6);
lsd.width = This->width;
lsd.height = This->height;
lsd.packed = 0;
if (This->encoder->colors)
lsd.packed |= 0x80; /* global color table flag */
lsd.packed |= 0x07 << 4; /* color resolution */
lsd.packed |= 0x07; /* global color table size */
lsd.background_color_index = 0; /* FIXME */
lsd.pixel_aspect_ratio = 0;
hr = IStream_Write(This->encoder->stream, &lsd, sizeof(lsd), NULL);
if (hr == S_OK && This->encoder->colors)
{
UINT i;
/* Global Color Table */
memset(gif_palette, 0, sizeof(gif_palette));
for (i = 0; i < This->encoder->colors; i++)
{
gif_palette[i][0] = (This->encoder->palette[i] >> 16) & 0xff;
gif_palette[i][1] = (This->encoder->palette[i] >> 8) & 0xff;
gif_palette[i][2] = This->encoder->palette[i] & 0xff;
}
hr = IStream_Write(This->encoder->stream, gif_palette, sizeof(gif_palette), NULL);
}
/* FIXME: write GCE, APE, etc. GIF extensions */
if (hr == S_OK)
This->encoder->info_written = TRUE;
}
if (hr == S_OK)
{
char image_separator = 0x2c;
hr = IStream_Write(This->encoder->stream, &image_separator, sizeof(image_separator), NULL);
if (hr == S_OK)
{
struct image_descriptor imd;
/* Image Descriptor */
imd.left = 0;
imd.top = 0;
imd.width = This->width;
imd.height = This->height;
imd.packed = 0;
if (This->colors)
{
imd.packed |= 0x80; /* local color table flag */
imd.packed |= 0x07; /* local color table size */
}
/* FIXME: interlace flag */
hr = IStream_Write(This->encoder->stream, &imd, sizeof(imd), NULL);
if (hr == S_OK && This->colors)
{
UINT i;
/* Local Color Table */
memset(gif_palette, 0, sizeof(gif_palette));
for (i = 0; i < This->colors; i++)
{
gif_palette[i][0] = (This->palette[i] >> 16) & 0xff;
gif_palette[i][1] = (This->palette[i] >> 8) & 0xff;
gif_palette[i][2] = This->palette[i] & 0xff;
}
hr = IStream_Write(This->encoder->stream, gif_palette, sizeof(gif_palette), NULL);
if (hr == S_OK)
{
/* Image Data */
hr = gif_compress(This->encoder->stream, This->image_data, This->width * This->height);
if (hr == S_OK)
This->committed = TRUE;
}
}
}
}
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->encoder->lock);
return hr;
}
static HRESULT WINAPI GifFrameEncode_GetMetadataQueryWriter(IWICBitmapFrameEncode *iface, IWICMetadataQueryWriter **writer)
{
FIXME("%p, %p: stub\n", iface, writer);
return E_NOTIMPL;
}
static const IWICBitmapFrameEncodeVtbl GifFrameEncode_Vtbl =
{
GifFrameEncode_QueryInterface,
GifFrameEncode_AddRef,
GifFrameEncode_Release,
GifFrameEncode_Initialize,
GifFrameEncode_SetSize,
GifFrameEncode_SetResolution,
GifFrameEncode_SetPixelFormat,
GifFrameEncode_SetColorContexts,
GifFrameEncode_SetPalette,
GifFrameEncode_SetThumbnail,
GifFrameEncode_WritePixels,
GifFrameEncode_WriteSource,
GifFrameEncode_Commit,
GifFrameEncode_GetMetadataQueryWriter
};
static HRESULT WINAPI GifEncoder_QueryInterface(IWICBitmapEncoder *iface, REFIID iid, void **ppv)
{
TRACE("%p,%s,%p\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapEncoder, iid))
{
IWICBitmapEncoder_AddRef(iface);
*ppv = iface;
return S_OK;
}
*ppv = NULL;
return E_NOINTERFACE;
}
static ULONG WINAPI GifEncoder_AddRef(IWICBitmapEncoder *iface)
{
GifEncoder *This = impl_from_IWICBitmapEncoder(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("%p -> %u\n", iface, ref);
return ref;
}
static ULONG WINAPI GifEncoder_Release(IWICBitmapEncoder *iface)
{
GifEncoder *This = impl_from_IWICBitmapEncoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("%p -> %u\n", iface, ref);
if (!ref)
{
if (This->stream) IStream_Release(This->stream);
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI GifEncoder_Initialize(IWICBitmapEncoder *iface, IStream *stream, WICBitmapEncoderCacheOption option)
{
GifEncoder *This = impl_from_IWICBitmapEncoder(iface);
HRESULT hr;
TRACE("%p,%p,%#x\n", iface, stream, option);
if (!stream) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (!This->initialized)
{
IStream_AddRef(stream);
This->stream = stream;
This->initialized = TRUE;
hr = S_OK;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI GifEncoder_GetContainerFormat(IWICBitmapEncoder *iface, GUID *format)
{
if (!format) return E_INVALIDARG;
*format = GUID_ContainerFormatGif;
return S_OK;
}
static HRESULT WINAPI GifEncoder_GetEncoderInfo(IWICBitmapEncoder *iface, IWICBitmapEncoderInfo **info)
{
IWICComponentInfo *comp_info;
HRESULT hr;
TRACE("%p,%p\n", iface, info);
if (!info) return E_INVALIDARG;
hr = CreateComponentInfo(&CLSID_WICGifEncoder, &comp_info);
if (hr == S_OK)
{
hr = IWICComponentInfo_QueryInterface(comp_info, &IID_IWICBitmapEncoderInfo, (void **)info);
IWICComponentInfo_Release(comp_info);
}
return hr;
}
static HRESULT WINAPI GifEncoder_SetColorContexts(IWICBitmapEncoder *iface, UINT count, IWICColorContext **context)
{
FIXME("%p,%u,%p: stub\n", iface, count, context);
return E_NOTIMPL;
}
static HRESULT WINAPI GifEncoder_SetPalette(IWICBitmapEncoder *iface, IWICPalette *palette)
{
GifEncoder *This = impl_from_IWICBitmapEncoder(iface);
HRESULT hr;
TRACE("%p,%p\n", iface, palette);
if (!palette) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (This->initialized)
hr = IWICPalette_GetColors(palette, 256, This->palette, &This->colors);
else
hr = WINCODEC_ERR_NOTINITIALIZED;
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI GifEncoder_SetThumbnail(IWICBitmapEncoder *iface, IWICBitmapSource *thumbnail)
{
TRACE("%p,%p\n", iface, thumbnail);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI GifEncoder_SetPreview(IWICBitmapEncoder *iface, IWICBitmapSource *preview)
{
TRACE("%p,%p\n", iface, preview);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI GifEncoder_CreateNewFrame(IWICBitmapEncoder *iface, IWICBitmapFrameEncode **frame, IPropertyBag2 **options)
{
GifEncoder *This = impl_from_IWICBitmapEncoder(iface);
HRESULT hr;
TRACE("%p,%p,%p\n", iface, frame, options);
if (!frame) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (This->initialized && !This->committed)
{
GifFrameEncode *ret = HeapAlloc(GetProcessHeap(), 0, sizeof(*ret));
if (ret)
{
This->n_frames++;
ret->IWICBitmapFrameEncode_iface.lpVtbl = &GifFrameEncode_Vtbl;
ret->ref = 1;
ret->encoder = This;
ret->initialized = FALSE;
ret->interlace = FALSE; /* FIXME: read from the properties */
ret->committed = FALSE;
ret->width = 0;
ret->height = 0;
ret->lines = 0;
ret->xres = 0.0;
ret->yres = 0.0;
ret->colors = 0;
ret->image_data = NULL;
IWICBitmapEncoder_AddRef(iface);
*frame = &ret->IWICBitmapFrameEncode_iface;
hr = S_OK;
if (options)
{
hr = CreatePropertyBag2(NULL, 0, options);
if (hr != S_OK)
{
IWICBitmapFrameEncode_Release(*frame);
*frame = NULL;
}
}
}
else
hr = E_OUTOFMEMORY;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI GifEncoder_Commit(IWICBitmapEncoder *iface)
{
GifEncoder *This = impl_from_IWICBitmapEncoder(iface);
HRESULT hr;
TRACE("%p\n", iface);
EnterCriticalSection(&This->lock);
if (This->initialized && !This->committed)
{
char gif_trailer = 0x3b;
/* FIXME: write text, comment GIF extensions */
hr = IStream_Write(This->stream, &gif_trailer, sizeof(gif_trailer), NULL);
if (hr == S_OK)
This->committed = TRUE;
}
else
hr = WINCODEC_ERR_WRONGSTATE;
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI GifEncoder_GetMetadataQueryWriter(IWICBitmapEncoder *iface, IWICMetadataQueryWriter **writer)
{
FIXME("%p,%p: stub\n", iface, writer);
return E_NOTIMPL;
}
static const IWICBitmapEncoderVtbl GifEncoder_Vtbl =
{
GifEncoder_QueryInterface,
GifEncoder_AddRef,
GifEncoder_Release,
GifEncoder_Initialize,
GifEncoder_GetContainerFormat,
GifEncoder_GetEncoderInfo,
GifEncoder_SetColorContexts,
GifEncoder_SetPalette,
GifEncoder_SetThumbnail,
GifEncoder_SetPreview,
GifEncoder_CreateNewFrame,
GifEncoder_Commit,
GifEncoder_GetMetadataQueryWriter
};
HRESULT GifEncoder_CreateInstance(REFIID iid, void **ppv)
{
GifEncoder *This;
HRESULT ret;
TRACE("%s,%p\n", debugstr_guid(iid), ppv);
*ppv = NULL;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapEncoder_iface.lpVtbl = &GifEncoder_Vtbl;
This->ref = 1;
This->stream = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": GifEncoder.lock");
This->initialized = FALSE;
This->info_written = FALSE;
This->committed = FALSE;
This->n_frames = 0;
This->colors = 0;
ret = IWICBitmapEncoder_QueryInterface(&This->IWICBitmapEncoder_iface, iid, ppv);
IWICBitmapEncoder_Release(&This->IWICBitmapEncoder_iface);
return ret;
}
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