/*

 * Copyright (C) 2009 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 CanvasObject_h

#define CanvasObject_h

#include <wtf/PassRefPtr.h>

#include <wtf/RefCounted.h>

#include "GraphicsContext3D.h"

namespace WebCore {

    class WebGLRenderingContext;

    class CanvasObject : public RefCounted<CanvasObject> {

    public:

        virtual ~CanvasObject();

        Platform3DObject object() const { return m_object; }

        void setObject(Platform3DObject, bool shouldDeleteObject = true);

        void deleteObject();

        void detachContext()

        {

            deleteObject();

            m_context = 0;

        }

        WebGLRenderingContext* context() const { return m_context; }

        virtual bool isBuffer() const { return false; }

        virtual bool isFramebuffer() const { return false; }

        virtual bool isProgram() const { return false; }

        virtual bool isRenderbuffer() const { return false; }

        virtual bool isShader() const { return false; }

        virtual bool isTexture() const { return false; }

    protected:

        CanvasObject(WebGLRenderingContext*);

        virtual void _deleteObject(Platform3DObject) = 0;

    private:

        Platform3DObject m_object;

        // The shouldDeleteObject flag indicates whether this wrapper

        // owns the underlying resource and should delete it when the

        // wrapper is unreferenced for the last time and deleted. It

        // is only set to false for certain objects returned from get

        // queries. FIXME: should consider canonicalizing all of these

        // objects in the future.

        bool m_shouldDeleteObject;

        WebGLRenderingContext* m_context;

    };

} // namespace WebCore

#endif // CanvasObject_h