| /* |
| * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef SKY_ENGINE_PLATFORM_IMAGE_DECODERS_PNG_PNGIMAGEDECODER_H_ |
| #define SKY_ENGINE_PLATFORM_IMAGE_DECODERS_PNG_PNGIMAGEDECODER_H_ |
| |
| #include "platform/image-decoders/ImageDecoder.h" |
| #include "sky/engine/wtf/Noncopyable.h" |
| #include "sky/engine/wtf/OwnPtr.h" |
| |
| namespace blink { |
| |
| class PNGImageReader; |
| |
| // This class decodes the PNG image format. |
| class PLATFORM_EXPORT PNGImageDecoder : public ImageDecoder { |
| WTF_MAKE_NONCOPYABLE(PNGImageDecoder); |
| public: |
| PNGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes); |
| virtual ~PNGImageDecoder(); |
| |
| // ImageDecoder |
| virtual String filenameExtension() const override { return "png"; } |
| virtual bool isSizeAvailable() override; |
| virtual bool hasColorProfile() const override { return m_hasColorProfile; } |
| virtual ImageFrame* frameBufferAtIndex(size_t) override; |
| // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid |
| // accessing deleted memory, especially when calling this from inside |
| // PNGImageReader! |
| virtual bool setFailed() override; |
| |
| // Callbacks from libpng |
| void headerAvailable(); |
| void rowAvailable(unsigned char* rowBuffer, unsigned rowIndex, int interlacePass); |
| void pngComplete(); |
| |
| bool isComplete() const |
| { |
| return !m_frameBufferCache.isEmpty() && (m_frameBufferCache.first().status() == ImageFrame::FrameComplete); |
| } |
| |
| private: |
| // Decodes the image. If |onlySize| is true, stops decoding after |
| // calculating the image size. If decoding fails but there is no more |
| // data coming, sets the "decode failure" flag. |
| void decode(bool onlySize); |
| |
| OwnPtr<PNGImageReader> m_reader; |
| bool m_doNothingOnFailure; |
| bool m_hasColorProfile; |
| }; |
| |
| } // namespace blink |
| |
| #endif // SKY_ENGINE_PLATFORM_IMAGE_DECODERS_PNG_PNGIMAGEDECODER_H_ |