blob: bac1059c8da9255e4238c5656c275ef6e9daa89b [file] [log] [blame]
[email protected]94f206c12012-08-25 00:09:141// 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
[email protected]9c88e562012-09-14 22:21:3015namespace cc {
[email protected]94f206c12012-08-25 00:09:1416
17GeometryBinding::GeometryBinding(WebKit::WebGraphicsContext3D* context, const FloatRect& 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 the layer quad.
29 0, 1, 2, 3}; // A line path for drawing the layer border.
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_quadVerticesVbo));
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
41GeometryBinding::~GeometryBinding()
42{
43 GLC(m_context, m_context->deleteBuffer(m_quadVerticesVbo));
44 GLC(m_context, m_context->deleteBuffer(m_quadElementsVbo));
45}
46
47void GeometryBinding::prepareForDraw()
48{
49 GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, quadVerticesVbo()));
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, GraphicsContext3D::FLOAT, false, 5 * sizeof(float), offset));
53 offset += 3 * sizeof(float);
54 GLC(m_context, m_context->vertexAttribPointer(texCoordAttribLocation(), 2, GraphicsContext3D::FLOAT, false, 5 * sizeof(float), offset));
55 GLC(m_context, m_context->enableVertexAttribArray(positionAttribLocation()));
56 GLC(m_context, m_context->enableVertexAttribArray(texCoordAttribLocation()));
57}
58
[email protected]9c88e562012-09-14 22:21:3059} // namespace cc
[email protected]94f206c12012-08-25 00:09:1460
61#endif // USE(ACCELERATED_COMPOSITING)