| // 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_STUB_IMAGE_DECODER_H_ |
| #define COBALT_LOADER_IMAGE_STUB_IMAGE_DECODER_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/compiler_specific.h" |
| #include "cobalt/loader/image/image.h" |
| #include "cobalt/loader/image/image_data_decoder.h" |
| |
| namespace cobalt { |
| namespace loader { |
| namespace image { |
| |
| // This class always returns a small image without decoding. It can be used |
| // during tests or benchmarks to minimize the impact of image decoding. |
| class StubImageDecoder : public ImageDataDecoder { |
| public: |
| explicit StubImageDecoder(render_tree::ResourceProvider* resource_provider, |
| const base::DebuggerHooks& debugger_hooks) |
| : ImageDataDecoder(resource_provider, debugger_hooks) {} |
| |
| // From ImageDataDecoder |
| std::string GetTypeString() const override { return "StubImageDecoder"; } |
| |
| static bool IsValidSignature(const uint8* header) { |
| return true; |
| } |
| |
| private: |
| // From ImageDataDecoder |
| size_t DecodeChunkInternal(const uint8* data, size_t input_byte) override { |
| if (!decoded_image_data_) { |
| decoded_image_data_ = AllocateImageData(math::Size(4, 4), true); |
| DCHECK(decoded_image_data_); |
| } |
| set_state(kDone); |
| return input_byte; |
| } |
| scoped_refptr<Image> FinishInternal() override { |
| return CreateStaticImage(std::move(decoded_image_data_)); |
| } |
| |
| std::unique_ptr<render_tree::ImageData> decoded_image_data_; |
| }; |
| |
| } // namespace image |
| } // namespace loader |
| } // namespace cobalt |
| |
| #endif // COBALT_LOADER_IMAGE_STUB_IMAGE_DECODER_H_ |