WebGLVertexArrayObjectOES.h revision 81bc750723a18f21cd17d1b173cd2a4dda9cea6e 
1/*
2 * Copyright (C) 2011 Google 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 WebGLVertexArrayObjectOES_h
27#define WebGLVertexArrayObjectOES_h
28
29#include "WebGLBuffer.h"
30#include "WebGLObject.h"
31
32#include <wtf/PassRefPtr.h>
33#include <wtf/RefCounted.h>
34
35namespace WebCore {
36
37class WebGLVertexArrayObjectOES : public WebGLObject {
38public:
39    enum VaoType {
40        VaoTypeDefault,
41        VaoTypeUser,
42    };
43
44    virtual ~WebGLVertexArrayObjectOES() { deleteObject(); }
45
46    static PassRefPtr<WebGLVertexArrayObjectOES> create(WebGLRenderingContext*, VaoType);
47
48    // Cached values for vertex attrib range checks
49    struct VertexAttribState {
50        VertexAttribState()
51            : enabled(false)
52            , bytesPerElement(0)
53            , size(4)
54            , type(GraphicsContext3D::FLOAT)
55            , normalized(false)
56            , stride(16)
57            , originalStride(0)
58            , offset(0)
59        {
60        }
61
62        bool enabled;
63        RefPtr<WebGLBuffer> bufferBinding;
64        GC3Dsizei bytesPerElement;
65        GC3Dint size;
66        GC3Denum type;
67        bool normalized;
68        GC3Dsizei stride;
69        GC3Dsizei originalStride;
70        GC3Dintptr offset;
71    };
72
73    bool isDefaultObject() const { return m_type == VaoTypeDefault; }
74
75    bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
76    void setHasEverBeenBound() { m_hasEverBeenBound = true; }
77
78    PassRefPtr<WebGLBuffer> getElementArrayBuffer() const { return m_boundElementArrayBuffer; }
79    void setElementArrayBuffer(PassRefPtr<WebGLBuffer> buffer) { m_boundElementArrayBuffer = buffer; }
80
81    VertexAttribState& getVertexAttribState(int index) { return m_vertexAttribState[index]; }
82
83private:
84    WebGLVertexArrayObjectOES(WebGLRenderingContext*, VaoType);
85
86    virtual void deleteObjectImpl(Platform3DObject);
87
88    virtual bool isVertexArray() const { return true; }
89
90    VaoType m_type;
91    bool m_hasEverBeenBound;
92    RefPtr<WebGLBuffer> m_boundElementArrayBuffer;
93    Vector<VertexAttribState> m_vertexAttribState;
94};
95
96} // namespace WebCore
97
98#endif // WebGLVertexArrayObjectOES_h
99