1/*
2 * Copyright (C) 2015-2017 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 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 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#pragma once
27
28#include "WebGLBuffer.h"
29#include "WebGLContextObject.h"
30
31namespace WebCore {
32
33class WebGLVertexArrayObjectBase : public WebGLContextObject {
34public:
35 enum class Type { Default, User };
36
37 // Cached values for vertex attrib range checks
38 struct VertexAttribState {
39 bool isBound() const { return bufferBinding && bufferBinding->object(); }
40 bool validateBinding() const { return !enabled || isBound(); }
41
42 bool enabled { false };
43 RefPtr<WebGLBuffer> bufferBinding;
44 GC3Dsizei bytesPerElement { 0 };
45 GC3Dint size { 4 };
46 GC3Denum type { GraphicsContext3D::FLOAT };
47 bool normalized { false };
48 GC3Dsizei stride { 16 };
49 GC3Dsizei originalStride { 0 };
50 GC3Dintptr offset { 0 };
51 GC3Duint divisor { 0 };
52 };
53
54 bool isDefaultObject() const { return m_type == Type::Default; }
55
56 bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
57 void setHasEverBeenBound() { m_hasEverBeenBound = true; }
58
59 WebGLBuffer* getElementArrayBuffer() const { return m_boundElementArrayBuffer.get(); }
60 void setElementArrayBuffer(WebGLBuffer*);
61
62 VertexAttribState& getVertexAttribState(int index) { return m_vertexAttribState[index]; }
63 void setVertexAttribState(GC3Duint, GC3Dsizei, GC3Dint, GC3Denum, GC3Dboolean, GC3Dsizei, GC3Dintptr, WebGLBuffer&);
64 void unbindBuffer(WebGLBuffer&);
65
66 void setVertexAttribDivisor(GC3Duint index, GC3Duint divisor);
67
68protected:
69 WebGLVertexArrayObjectBase(WebGLRenderingContextBase&, Type);
70 void deleteObjectImpl(GraphicsContext3D*, Platform3DObject) override = 0;
71
72 Type m_type;
73 bool m_hasEverBeenBound { false };
74 RefPtr<WebGLBuffer> m_boundElementArrayBuffer;
75 Vector<VertexAttribState> m_vertexAttribState;
76};
77
78} // namespace WebCore
79