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1 // Copyright 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "config.h" | |
6 | |
7 #if USE(ACCELERATED_COMPOSITING) | |
8 | |
9 #include "GeometryBinding.h" | |
10 | |
11 #include "CCRendererGL.h" // For the GLC() macro. | |
12 #include "GraphicsContext3D.h" | |
13 #include <public/WebGraphicsContext3D.h> | |
14 | |
15 namespace cc { | |
16 | |
17 GeometryBinding::GeometryBinding(WebKit::WebGraphicsContext3D* context, const Fl
oatRect& quadVertexRect) | |
18 : m_context(context) | |
19 , m_quadVerticesVbo(0) | |
20 , m_quadElementsVbo(0) | |
21 , m_initialized(false) | |
22 { | |
23 // Vertex positions and texture coordinates for the 4 corners of a 1x1 quad. | |
24 float vertices[] = { quadVertexRect.x(), quadVertexRect.maxY(), 0.0f, 0.0f,
1.0f, | |
25 quadVertexRect.x(), quadVertexRect.y(), 0.0f, 0.0f, 0.
0f, | |
26 quadVertexRect.maxX(), quadVertexRect.y(), 0.0f, 1.0f,
0.0f, | |
27 quadVertexRect.maxX(), quadVertexRect.maxY(), 0.0f, 1.
0f, 1.0f }; | |
28 uint16_t indices[] = { 0, 1, 2, 0, 2, 3, // The two triangles that make up t
he layer quad. | |
29 0, 1, 2, 3}; // A line path for drawing the layer bor
der. | |
30 | |
31 GLC(m_context, m_quadVerticesVbo = m_context->createBuffer()); | |
32 GLC(m_context, m_quadElementsVbo = m_context->createBuffer()); | |
33 GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, m_quad
VerticesVbo)); | |
34 GLC(m_context, m_context->bufferData(GraphicsContext3D::ARRAY_BUFFER, sizeof
(vertices), vertices, GraphicsContext3D::STATIC_DRAW)); | |
35 GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ELEMENT_ARRAY_BUFFER
, m_quadElementsVbo)); | |
36 GLC(m_context, m_context->bufferData(GraphicsContext3D::ELEMENT_ARRAY_BUFFER
, sizeof(indices), indices, GraphicsContext3D::STATIC_DRAW)); | |
37 | |
38 m_initialized = true; | |
39 } | |
40 | |
41 GeometryBinding::~GeometryBinding() | |
42 { | |
43 GLC(m_context, m_context->deleteBuffer(m_quadVerticesVbo)); | |
44 GLC(m_context, m_context->deleteBuffer(m_quadElementsVbo)); | |
45 } | |
46 | |
47 void GeometryBinding::prepareForDraw() | |
48 { | |
49 GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, quadVe
rticesVbo())); | |
50 GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ELEMENT_ARRAY_BUFFER
, quadElementsVbo())); | |
51 unsigned offset = 0; | |
52 GLC(m_context, m_context->vertexAttribPointer(positionAttribLocation(), 3, G
raphicsContext3D::FLOAT, false, 5 * sizeof(float), offset)); | |
53 offset += 3 * sizeof(float); | |
54 GLC(m_context, m_context->vertexAttribPointer(texCoordAttribLocation(), 2, G
raphicsContext3D::FLOAT, false, 5 * sizeof(float), offset)); | |
55 GLC(m_context, m_context->enableVertexAttribArray(positionAttribLocation()))
; | |
56 GLC(m_context, m_context->enableVertexAttribArray(texCoordAttribLocation()))
; | |
57 } | |
58 | |
59 } // namespace cc | |
60 | |
61 #endif // USE(ACCELERATED_COMPOSITING) | |
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