00001 /* 00002 * Copyright (C) 2007 Pleyo. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of Pleyo nor the names of 00014 * its contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY PLEYO AND ITS CONTRIBUTORS "AS IS" AND ANY 00018 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 00019 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00020 * DISCLAIMED. IN NO EVENT SHALL PLEYO OR ITS CONTRIBUTORS BE LIABLE FOR ANY 00021 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00022 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00023 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00024 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00025 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 00026 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 */ 00028 #ifndef BAL_JPEG_DECODER_H_ 00029 #define BAL_JPEG_DECODER_H_ 00030 00031 #include "BIImageDecoder.h" 00032 #include "ImageDecoderCommonImplementation.h" 00033 #include "ImageObserver.h" 00034 00035 namespace BC { 00036 00037 class JPEGImageReader; 00038 00044 class BCJPEGImageDecoder : public BAL::BIImageDecoder 00045 { 00046 public: 00047 BCJPEGImageDecoder(); 00048 virtual ~BCJPEGImageDecoder(); 00049 00050 // Take the data and store it. 00051 virtual void setData(const Vector<char>* data, bool allDataReceived); 00052 00053 // Whether or not the size information has been decoded yet. 00054 virtual bool isSizeAvailable() const; 00055 00056 virtual BAL::RGBA32Buffer* frameBufferAtIndex(size_t index); 00057 00058 virtual bool supportsAlpha() const { return false; } 00059 00060 virtual IntSize size() const { return mImageDecoderCommonImplementation.size(); } 00061 00062 virtual int frameCount() { return 1; } 00063 00064 virtual int repetitionCount() const { return WebCore::cAnimationNone; } 00065 00066 public: 00067 // Following implementation needs to be public, to be accessed by reader 00068 void decode(bool sizeOnly = false) const; 00069 00070 JPEGImageReader* reader() { return m_reader; } 00071 00072 void setSize(int width, int height) { 00073 if (!mImageDecoderCommonImplementation.isSizeAvailable()) { 00074 mImageDecoderCommonImplementation.setSizeAvailable(true); 00075 mImageDecoderCommonImplementation.setSize( IntSize(width, height) ); 00076 } 00077 } 00078 00079 bool outputScanlines(); 00080 void jpegComplete(); 00081 00082 private: 00083 mutable JPEGImageReader* m_reader; 00084 00085 ImageDecoderCommonImplementation mImageDecoderCommonImplementation; 00086 }; 00087 00088 } 00089 00090 #endif