| // 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_ |