1 /* 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2008-2009 Torch Mobile, Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef JPEGImageDecoder_h 28 #define JPEGImageDecoder_h 29 30 #include "platform/image-decoders/ImageDecoder.h" 31 32 #include "wtf/Noncopyable.h" 33 #include "wtf/OwnPtr.h" 34 35 namespace blink { 36 37 class JPEGImageReader; 38 39 // This class decodes the JPEG image format. 40 class PLATFORM_EXPORT JPEGImageDecoder : public ImageDecoder { 41 WTF_MAKE_NONCOPYABLE(JPEGImageDecoder); 42 public: 43 JPEGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes); 44 virtual ~JPEGImageDecoder(); 45 46 // ImageDecoder 47 virtual String filenameExtension() const OVERRIDE { return "jpg"; } 48 virtual bool isSizeAvailable() OVERRIDE; 49 virtual bool hasColorProfile() const OVERRIDE { return m_hasColorProfile; } 50 virtual IntSize decodedSize() const OVERRIDE { return m_decodedSize; } 51 virtual IntSize decodedYUVSize(int component, SizeType) const OVERRIDE; 52 virtual bool setSize(unsigned width, unsigned height) OVERRIDE; 53 virtual ImageFrame* frameBufferAtIndex(size_t) OVERRIDE; 54 // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid 55 // accessing deleted memory, especially when calling this from inside 56 // JPEGImageReader! 57 virtual bool setFailed() OVERRIDE; 58 virtual bool canDecodeToYUV() const OVERRIDE; 59 virtual bool decodeToYUV() OVERRIDE; 60 virtual void setImagePlanes(PassOwnPtr<ImagePlanes>) OVERRIDE; 61 bool hasImagePlanes() const { return m_imagePlanes; } 62 63 bool outputScanlines(); 64 unsigned desiredScaleNumerator() const; 65 void jpegComplete(); 66 67 void setOrientation(ImageOrientation orientation) { m_orientation = orientation; } 68 void setHasColorProfile(bool hasColorProfile) { m_hasColorProfile = hasColorProfile; } 69 void setDecodedSize(unsigned width, unsigned height); 70 71 private: 72 // Decodes the image. If |onlySize| is true, stops decoding after 73 // calculating the image size. If decoding fails but there is no more 74 // data coming, sets the "decode failure" flag. 75 void decode(bool onlySize); 76 77 OwnPtr<JPEGImageReader> m_reader; 78 OwnPtr<ImagePlanes> m_imagePlanes; 79 IntSize m_decodedSize; 80 bool m_hasColorProfile; 81 }; 82 83 } // namespace blink 84 85 #endif 86
