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 PNGImageDecoder_h 27 #define PNGImageDecoder_h 28 29 #include "ImageDecoder.h" 30 #include <wtf/OwnPtr.h> 31 32 namespace WebCore { 33 34 class PNGImageReader; 35 36 // This class decodes the PNG image format. 37 class PNGImageDecoder : public ImageDecoder { 38 public: 39 PNGImageDecoder(); 40 ~PNGImageDecoder(); 41 filenameExtension()42 virtual String filenameExtension() const { return "png"; } 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(); 49 50 virtual RGBA32Buffer* frameBufferAtIndex(size_t index); 51 52 void decode(bool sizeOnly = false); 53 54 // Callbacks from libpng 55 void decodingFailed(); 56 void headerAvailable(); 57 void rowAvailable(unsigned char* rowBuffer, unsigned rowIndex, int interlacePass); 58 void pngComplete(); 59 60 private: 61 OwnPtr<PNGImageReader> m_reader; 62 }; 63 64 } // namespace WebCore 65 66 #endif 67