| // Copyright 2016 The Cobalt Authors. 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_THREADED_IMAGE_DECODER_PROXY_H_ |
| #define COBALT_LOADER_IMAGE_THREADED_IMAGE_DECODER_PROXY_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/callback.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/message_loop/message_loop.h" |
| #include "cobalt/loader/decoder.h" |
| #include "cobalt/loader/image/image.h" |
| #include "cobalt/loader/image/image_data_decoder.h" |
| #include "cobalt/loader/image/image_decoder.h" |
| #include "cobalt/render_tree/resource_provider.h" |
| |
| namespace cobalt { |
| namespace loader { |
| namespace image { |
| |
| // This class handles the layer of indirection between images that web module |
| // thread wants to decode, and the ResourceLoader thread that does the actual |
| // work. |
| class ThreadedImageDecoderProxy : public Decoder { |
| public: |
| typedef base::Callback<void(const scoped_refptr<Image>&)> |
| ImageAvailableCallback; |
| |
| ~ThreadedImageDecoderProxy(); |
| |
| // This function is used for binding a callback to create a |
| // ThreadedImageDecoderProxy. |
| static std::unique_ptr<Decoder> Create( |
| render_tree::ResourceProvider* resource_provider, |
| const base::DebuggerHooks* debugger_hooks, |
| const ImageAvailableCallback& image_available_callback, |
| base::MessageLoop* load_message_loop_, |
| const loader::Decoder::OnCompleteFunction& load_complete_callback) { |
| return std::unique_ptr<Decoder>(new ThreadedImageDecoderProxy( |
| resource_provider, debugger_hooks, image_available_callback, |
| load_message_loop_, load_complete_callback)); |
| } |
| |
| // From the Decoder interface. |
| LoadResponseType OnResponseStarted( |
| Fetcher* fetcher, |
| const scoped_refptr<net::HttpResponseHeaders>& headers) override; |
| void DecodeChunk(const char* data, size_t size) override; |
| void DecodeChunkPassed(std::unique_ptr<std::string> data) override; |
| void Finish() override; |
| bool Suspend() override; |
| void Resume(render_tree::ResourceProvider* resource_provider) override; |
| |
| private: |
| ThreadedImageDecoderProxy( |
| render_tree::ResourceProvider* resource_provider, |
| const base::DebuggerHooks* debugger_hooks, |
| const ImageAvailableCallback& image_available_callback, |
| base::MessageLoop* load_message_loop_, |
| const loader::Decoder::OnCompleteFunction& load_complete_callback); |
| |
| base::WeakPtrFactory<ThreadedImageDecoderProxy> weak_ptr_factory_; |
| base::WeakPtr<ThreadedImageDecoderProxy> weak_this_; |
| |
| // The message loop that |image_decoder_| should run on. |
| base::MessageLoop* load_message_loop_; |
| |
| // The message loop that the original callbacks passed into us should run |
| // on. |
| base::MessageLoop* result_message_loop_; |
| |
| // The actual image decoder. |
| std::unique_ptr<ImageDecoder> image_decoder_; |
| }; |
| |
| } // namespace image |
| } // namespace loader |
| } // namespace cobalt |
| |
| #endif // COBALT_LOADER_IMAGE_THREADED_IMAGE_DECODER_PROXY_H_ |