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/* libs/graphics/ports/SkImageDecoder_Factory.cpp
**
** Copyright 2006, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include "SkImageDecoder.h"
#include "SkMovie.h"
#include "SkStream.h"
//#define USE_PV_FOR_JPEG
extern SkImageDecoder* SkImageDecoder_GIF_Factory(SkStream*);
extern SkImageDecoder* SkImageDecoder_BMP_Factory(SkStream*);
extern SkImageDecoder* SkImageDecoder_ICO_Factory(SkStream*);
extern SkImageDecoder* SkImageDecoder_PNG_Factory(SkStream*);
extern SkImageDecoder* SkImageDecoder_WBMP_Factory(SkStream*);
#ifdef USE_PV_FOR_JPEG
extern SkImageDecoder* SkImageDecoder_PVJPEG_Factory(SkStream*);
#else
extern SkImageDecoder* SkImageDecoder_JPEG_Factory(SkStream*);
#endif
typedef SkImageDecoder* (*SkImageDecoderFactoryProc)(SkStream*);
struct CodecFormat {
SkImageDecoderFactoryProc fProc;
SkImageDecoder::Format fFormat;
};
static const CodecFormat gPairs[] = {
{ SkImageDecoder_GIF_Factory, SkImageDecoder::kGIF_Format },
{ SkImageDecoder_PNG_Factory, SkImageDecoder::kPNG_Format },
{ SkImageDecoder_ICO_Factory, SkImageDecoder::kICO_Format },
{ SkImageDecoder_WBMP_Factory, SkImageDecoder::kWBMP_Format },
{ SkImageDecoder_BMP_Factory, SkImageDecoder::kBMP_Format },
// jpeg must be last, as it doesn't have a good sniffer yet
#ifdef USE_PV_FOR_JPEG
{ SkImageDecoder_PVJPEG_Factory, SkImageDecoder::kJPEG_Format }
#else
{ SkImageDecoder_JPEG_Factory, SkImageDecoder::kJPEG_Format }
#endif
};
SkImageDecoder* SkImageDecoder::Factory(SkStream* stream) {
for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
SkImageDecoder* codec = gPairs[i].fProc(stream);
stream->rewind();
if (NULL != codec) {
return codec;
}
}
return NULL;
}
bool SkImageDecoder::SupportsFormat(Format format) {
for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
if (gPairs[i].fFormat == format) {
return true;
}
}
return false;
}
/////////////////////////////////////////////////////////////////////////
// the movie may hold onto the stream (by calling ref())
typedef SkMovie* (*SkMovieStreamProc)(SkStream*);
// the movie may NOT hold onto the pointer
typedef SkMovie* (*SkMovieMemoryProc)(const void*, size_t);
extern SkMovie* SkMovie_GIF_StreamFactory(SkStream*);
extern SkMovie* SkMovie_GIF_MemoryFactory(const void*, size_t);
static const SkMovieStreamProc gStreamProc[] = {
SkMovie_GIF_StreamFactory
};
static const SkMovieMemoryProc gMemoryProc[] = {
SkMovie_GIF_MemoryFactory
};
SkMovie* SkMovie::DecodeStream(SkStream* stream) {
for (unsigned i = 0; i < SK_ARRAY_COUNT(gStreamProc); i++) {
SkMovie* movie = gStreamProc[i](stream);
if (NULL != movie) {
return movie;
}
stream->rewind();
}
return NULL;
}
SkMovie* SkMovie::DecodeMemory(const void* data, size_t length)
{
for (unsigned i = 0; i < SK_ARRAY_COUNT(gMemoryProc); i++) {
SkMovie* movie = gMemoryProc[i](data, length);
if (NULL != movie) {
return movie;
}
}
return NULL;
}
/////////////////////////////////////////////////////////////////////////
#ifdef SK_SUPPORT_IMAGE_ENCODE
extern SkImageEncoder* SkImageEncoder_JPEG_Factory();
extern SkImageEncoder* SkImageEncoder_PNG_Factory();
SkImageEncoder* SkImageEncoder::Create(Type t) {
switch (t) {
case kJPEG_Type:
return SkImageEncoder_JPEG_Factory();
case kPNG_Type:
return SkImageEncoder_PNG_Factory();
default:
return NULL;
}
}
#endif
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