1 /* 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef JPEG_DECODER_H_ 27 #define JPEG_DECODER_H_ 28 29 #include "ImageDecoder.h" 30 31 namespace WebCore { 32 33 class JPEGImageReader; 34 35 // This class decodes the JPEG image format. 36 class JPEGImageDecoder : public ImageDecoder 37 { 38 public: 39 JPEGImageDecoder(); 40 ~JPEGImageDecoder(); 41 filenameExtension()42 virtual String filenameExtension() const { return "jpg"; } 43 44 // Take the data and store it. 45 virtual void setData(SharedBuffer* data, bool allDataReceived); 46 47 // Whether or not the size information has been decoded yet. 48 virtual bool isSizeAvailable() const; 49 50 virtual RGBA32Buffer* frameBufferAtIndex(size_t index); 51 supportsAlpha()52 virtual bool supportsAlpha() const { return false; } 53 54 void decode(bool sizeOnly = false) const; 55 reader()56 JPEGImageReader* reader() { return m_reader; } 57 setSize(int width,int height)58 void setSize(int width, int height) { 59 if (!m_sizeAvailable) { 60 m_sizeAvailable = true; 61 m_size = IntSize(width, height); 62 } 63 } 64 65 bool outputScanlines(); 66 void jpegComplete(); 67 68 private: 69 mutable JPEGImageReader* m_reader; 70 }; 71 72 } 73 74 #endif 75