/*

 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef ImageBuffer_h

#define ImageBuffer_h

#include "IntSize.h"

#include <wtf/OwnPtr.h>

#include <memory>

#if PLATFORM(CG)

typedef struct CGImage* CGImageRef;

#endif

#if PLATFORM(QT)

#include <QPixmap>

class QPainter;

#endif

#if PLATFORM(CAIRO)

struct _cairo_surface;

#endif

namespace WebCore {

    class GraphicsContext;

    class RenderObject;

    class ImageBuffer : Noncopyable {

    public:

        static std::auto_ptr<ImageBuffer> create(const IntSize&, bool grayScale);

        ~ImageBuffer();

        IntSize size() const;

        GraphicsContext* context() const;

        // This offers a way to render parts of a WebKit rendering tree into this ImageBuffer class.

        // FIXME: This doesn't belong in the platform directory.

        // Bad layering that this knows about the render tree.

        // We need to move it into RenderObject or somewhere in the SVG world.

        static void renderSubtreeToImage(ImageBuffer*, RenderObject*);

#if PLATFORM(CG)

        CGImageRef cgImage() const;

#elif PLATFORM(QT)

        QPixmap* pixmap() const;

#elif PLATFORM(CAIRO)

        _cairo_surface* surface() const;

#endif

    private:

        void* m_data;

        IntSize m_size;

        OwnPtr<GraphicsContext> m_context;

#if PLATFORM(CG)

        ImageBuffer(void* imageData, const IntSize&, std::auto_ptr<GraphicsContext>);

        mutable CGImageRef m_cgImage;

#elif PLATFORM(QT)

        ImageBuffer(const QPixmap &px);

        mutable QPixmap m_pixmap;

        mutable QPainter* m_painter;

#elif PLATFORM(CAIRO)

        ImageBuffer(_cairo_surface* surface);

        mutable _cairo_surface *m_surface;

#endif

    };

}

#endif