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      1 /*
      2  * Copyright (C) 2006 Friedemann Kleint <fkleint (at) trolltech.com>
      3  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
      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 ImageDecoderQt_h
     28 #define ImageDecoderQt_h
     29 
     30 #include "ImageDecoder.h"
     31 #include <QtGui/QImageReader>
     32 #include <QtGui/QPixmap>
     33 #include <QtCore/QList>
     34 #include <QtCore/QHash>
     35 #include <QtCore/QBuffer>
     36 #include <wtf/OwnPtr.h>
     37 
     38 namespace WebCore {
     39 
     40 
     41 class ImageDecoderQt : public ImageDecoder
     42 {
     43 public:
     44     ImageDecoderQt();
     45     ~ImageDecoderQt();
     46 
     47     virtual void setData(SharedBuffer* data, bool allDataReceived);
     48     virtual bool isSizeAvailable();
     49     virtual size_t frameCount();
     50     virtual int repetitionCount() const;
     51     virtual RGBA32Buffer* frameBufferAtIndex(size_t index);
     52 
     53     virtual String filenameExtension() const;
     54 
     55     virtual void clearFrameBufferCache(size_t clearBeforeFrame);
     56 
     57 private:
     58     ImageDecoderQt(const ImageDecoderQt&);
     59     ImageDecoderQt &operator=(const ImageDecoderQt&);
     60 
     61 private:
     62     void internalDecodeSize();
     63     void internalReadImage(size_t);
     64     void internalHandleCurrentImage(size_t);
     65     void forceLoadEverything();
     66     void failRead();
     67 
     68 private:
     69     QByteArray m_format;
     70     OwnPtr<QBuffer> m_buffer;
     71     OwnPtr<QImageReader> m_reader;
     72     mutable int m_repetitionCount;
     73 };
     74 
     75 
     76 
     77 }
     78 
     79 #endif
     80 
     81