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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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.
#ifndef COBALT_LOADER_IMAGE_JPEG_IMAGE_DECODER_H_
#define COBALT_LOADER_IMAGE_JPEG_IMAGE_DECODER_H_
#include <setjmp.h>
#include <string>
#include "base/callback.h"
#include "base/memory/scoped_ptr.h"
#include "cobalt/loader/image/image_data_decoder.h"
// Inhibit C++ name-mangling for libjpeg functions.
extern "C" {
#include "third_party/libjpeg/jpeglib.h"
}
namespace cobalt {
namespace loader {
namespace image {
class JPEGImageDecoder : public ImageDataDecoder {
public:
explicit JPEGImageDecoder(render_tree::ResourceProvider* resource_provider);
~JPEGImageDecoder() OVERRIDE;
// From ImageDataDecoder
std::string GetTypeString() const OVERRIDE { return "JPEGImageDecoder"; }
private:
// From ImageDataDecoder
size_t DecodeChunkInternal(const uint8* data, size_t size) OVERRIDE;
bool ReadHeader();
bool StartDecompress();
bool DecodeProgressiveJPEG();
bool ReadLines();
jpeg_decompress_struct info_;
jpeg_source_mgr source_manager_;
jpeg_error_mgr error_manager_;
};
} // namespace image
} // namespace loader
} // namespace cobalt
#endif // COBALT_LOADER_IMAGE_JPEG_IMAGE_DECODER_H_