| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_OFFLINE_PAGES_VISUALS_DECODER_IMPL_H_ |
| #define CHROME_BROWSER_OFFLINE_PAGES_VISUALS_DECODER_IMPL_H_ |
| |
| #include <memory> |
| |
| #include "components/offline_pages/core/visuals_decoder.h" |
| |
| namespace image_fetcher { |
| class ImageDecoder; |
| } // namespace image_fetcher |
| |
| namespace offline_pages { |
| |
| class VisualsDecoderImpl : public VisualsDecoder { |
| public: |
| explicit VisualsDecoderImpl( |
| std::unique_ptr<image_fetcher::ImageDecoder> decoder); |
| ~VisualsDecoderImpl() override; |
| |
| // Decodes the downloaded image, crops it and re-encodes it as a PNG |
| // file to be used as the thumbnail of an offlined suggested article or as the |
| // favicon. In the case of .ICO favicons, the frame whose size matches our |
| // preferred favicon size (or the next larger one) will be re-encoded. |
| // Note: the local decoding in a separate process and local re-encoding as a |
| // PNG are important security measures to disarm a potential |
| // maliciously-crafted JPEG, which cannot maintain its evil nature after being |
| // converted to PNG. |
| void DecodeAndCropImage(const std::string& thumbnail_data, |
| DecodeComplete complete_callback) override; |
| |
| private: |
| std::unique_ptr<image_fetcher::ImageDecoder> image_decoder_; |
| }; |
| |
| } // namespace offline_pages |
| |
| #endif // CHROME_BROWSER_OFFLINE_PAGES_VISUALS_DECODER_IMPL_H_ |