/*

 * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.

 * Copyright (C) 2007 Alp Toker <alp@atoker.com>

 *

 * 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 HTMLCanvasElement_h

#define HTMLCanvasElement_h

#include "HTMLElement.h"

#include "IntSize.h"

#if PLATFORM(CG)

// FIXME: CG-specific parts need to move to the platform directory.

typedef struct CGContext* CGContextRef;

typedef struct CGImage* CGImageRef;

#elif PLATFORM(QT)

class QImage;

class QPainter;

#elif PLATFORM(CAIRO)

typedef struct _cairo_surface cairo_surface_t;

#endif

namespace WebCore {

class CanvasRenderingContext2D;

typedef CanvasRenderingContext2D CanvasRenderingContext;

class FloatRect;

class GraphicsContext;

class HTMLCanvasElement : public HTMLElement {

public:

    HTMLCanvasElement(Document*);

    virtual ~HTMLCanvasElement();

    virtual HTMLTagStatus endTagRequirement() const;

    virtual int tagPriority() const;

    int width() const { return m_size.width(); }

    int height() const { return m_size.height(); }

    void setWidth(int);

    void setHeight(int);

    CanvasRenderingContext* getContext(const String&);

    // FIXME: Web Applications 1.0 describes a toDataURL function.

    virtual void parseMappedAttribute(MappedAttribute*);

    virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);

    IntSize size() const { return m_size; }

    void willDraw(const FloatRect&);

    void paint(GraphicsContext*, const IntRect&);

    GraphicsContext* drawingContext() const;

#if PLATFORM(CG)

    CGImageRef createPlatformImage() const;

#elif PLATFORM(QT)

    QImage createPlatformImage() const;

#elif PLATFORM(CAIRO)

    cairo_surface_t* createPlatformImage() const;

#endif

private:

    void createDrawingContext() const;

    void reset();

    bool m_rendererIsCanvas;

    RefPtr<CanvasRenderingContext2D> m_2DContext;

    IntSize m_size;

    // FIXME: Web Applications 1.0 describes a security feature where we track

    // if we ever drew any images outside the domain, so we can disable toDataURL.

    mutable bool m_createdDrawingContext;

#if PLATFORM(CG)

    mutable void* m_data;

#elif PLATFORM(QT)

    mutable QImage* m_data;

    mutable QPainter* m_painter;

#elif PLATFORM(CAIRO)

    mutable void* m_data;

    mutable cairo_surface_t* m_surface;

#else

    mutable void* m_data;

#endif

    mutable GraphicsContext* m_drawingContext;

};

} //namespace

#endif