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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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