1/*
2 * Copyright (C) 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef CanvasObject_h
27#define CanvasObject_h
28
29#include <wtf/PassRefPtr.h>
30#include <wtf/RefCounted.h>
31
32#include "GraphicsContext3D.h"
33
34namespace WebCore {
35
36    class WebGLRenderingContext;
37
38    class CanvasObject : public RefCounted<CanvasObject> {
39    public:
40        virtual ~CanvasObject();
41
42        Platform3DObject object() const { return m_object; }
43        void setObject(Platform3DObject, bool shouldDeleteObject = true);
44        void deleteObject();
45
46        void detachContext()
47        {
48            deleteObject();
49            m_context = 0;
50        }
51
52        WebGLRenderingContext* context() const { return m_context; }
53
54    protected:
55        CanvasObject(WebGLRenderingContext*);
56        virtual void _deleteObject(Platform3DObject) = 0;
57
58    private:
59        Platform3DObject m_object;
60        // The shouldDeleteObject flag indicates whether this wrapper
61        // owns the underlying resource and should delete it when the
62        // wrapper is unreferenced for the last time and deleted. It
63        // is only set to false for certain objects returned from get
64        // queries. FIXME: should consider canonicalizing all of these
65        // objects in the future.
66        bool m_shouldDeleteObject;
67        WebGLRenderingContext* m_context;
68    };
69
70} // namespace WebCore
71
72#endif // CanvasObject_h
73