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 "core/platform/image-decoders/ImageDecoder.h" 31 32 #include "wtf/OwnPtr.h" 33 34 namespace WebCore { 35 36 class JPEGImageReader; 37 38 // This class decodes the JPEG image format. 39 class JPEGImageDecoder : public ImageDecoder { 40 public: 41 JPEGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption); 42 virtual ~JPEGImageDecoder(); 43 44 // ImageDecoder 45 virtual String filenameExtension() const { return "jpg"; } 46 virtual bool isSizeAvailable(); 47 virtual ImageFrame* frameBufferAtIndex(size_t); 48 // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid 49 // accessing deleted memory, especially when calling this from inside 50 // JPEGImageReader! 51 virtual bool setFailed(); 52 53 bool outputScanlines(); 54 void jpegComplete(); 55 56 void setOrientation(ImageOrientation orientation) { m_orientation = orientation; } 57 58 private: 59 // Decodes the image. If |onlySize| is true, stops decoding after 60 // calculating the image size. If decoding fails but there is no more 61 // data coming, sets the "decode failure" flag. 62 void decode(bool onlySize); 63 64 OwnPtr<JPEGImageReader> m_reader; 65 }; 66 67 } // namespace WebCore 68 69 #endif 70
