Source/core/platform/graphics/skia/SkiaSharedBufferStream.h

/*
 * Copyright (c) 2013, Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 */

#ifndef SkiaSharedBufferStream_h
#define SkiaSharedBufferStream_h

#include "platform/SharedBuffer.h"
#include "third_party/skia/include/core/SkStream.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefPtr.h"

namespace WebCore {

class SkiaSharedBufferStream : public SkStreamAsset {
public:
    static PassRefPtr<SkiaSharedBufferStream> create(PassRefPtr<SharedBuffer> buffer)
    {
        return adoptRef(new SkiaSharedBufferStream(buffer));
    }

    virtual ~SkiaSharedBufferStream()
    {
    }

    virtual size_t read(void* buffer, size_t bytesRequested) OVERRIDE;
    virtual bool isAtEnd() const OVERRIDE;

    virtual bool rewind() OVERRIDE;
    virtual SkiaSharedBufferStream* duplicate() const OVERRIDE;

    virtual size_t getPosition() const OVERRIDE;
    virtual bool seek(size_t position) OVERRIDE;
    virtual bool move(long offset) OVERRIDE;
    virtual SkiaSharedBufferStream* fork() const OVERRIDE;

    virtual size_t getLength() const OVERRIDE;

    virtual const void* getMemoryBase() OVERRIDE;

private:
    explicit SkiaSharedBufferStream(PassRefPtr<SharedBuffer> buffer)
        : m_buffer(buffer)
        , m_offset(0)
    {
    }

    RefPtr<SharedBuffer> m_buffer;
    size_t m_offset;
};

}

#endif