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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27
28 #if USE(ACCELERATED_COMPOSITING)
29
30 #include "ProgramBinding.h"
31
32 #include "GeometryBinding.h"
33 #include "GraphicsContext.h"
34 #include "GraphicsContext3D.h"
35 #include "LayerRendererChromium.h"
36
37 namespace WebCore {
38
ProgramBindingBase(GraphicsContext3D * context)39 ProgramBindingBase::ProgramBindingBase(GraphicsContext3D* context)
40 : m_context(context)
41 , m_program(0)
42 , m_initialized(false)
43 {
44 }
45
~ProgramBindingBase()46 ProgramBindingBase::~ProgramBindingBase()
47 {
48 if (m_program)
49 GLC(m_context, m_context->deleteProgram(m_program));
50 }
51
init(const String & vertexShader,const String & fragmentShader)52 bool ProgramBindingBase::init(const String& vertexShader, const String& fragmentShader)
53 {
54 m_program = createShaderProgram(vertexShader, fragmentShader);
55 if (!m_program) {
56 LOG_ERROR("Failed to create shader program");
57 return false;
58 }
59 return true;
60 }
61
loadShader(unsigned type,const String & shaderSource)62 unsigned ProgramBindingBase::loadShader(unsigned type, const String& shaderSource)
63 {
64 unsigned shader = m_context->createShader(type);
65 if (!shader)
66 return 0;
67 String sourceString(shaderSource);
68 GLC(m_context, m_context->shaderSource(shader, sourceString));
69 GLC(m_context, m_context->compileShader(shader));
70 int compiled = 0;
71 GLC(m_context, m_context->getShaderiv(shader, GraphicsContext3D::COMPILE_STATUS, &compiled));
72 if (!compiled) {
73 GLC(m_context, m_context->deleteShader(shader));
74 return 0;
75 }
76 return shader;
77 }
78
createShaderProgram(const String & vertexShaderSource,const String & fragmentShaderSource)79 unsigned ProgramBindingBase::createShaderProgram(const String& vertexShaderSource, const String& fragmentShaderSource)
80 {
81 unsigned vertexShader = loadShader(GraphicsContext3D::VERTEX_SHADER, vertexShaderSource);
82 if (!vertexShader) {
83 LOG_ERROR("Failed to create vertex shader");
84 return 0;
85 }
86
87 unsigned fragmentShader = loadShader(GraphicsContext3D::FRAGMENT_SHADER, fragmentShaderSource);
88 if (!fragmentShader) {
89 GLC(m_context, m_context->deleteShader(vertexShader));
90 LOG_ERROR("Failed to create fragment shader");
91 return 0;
92 }
93
94 unsigned programObject = m_context->createProgram();
95 if (!programObject) {
96 LOG_ERROR("Failed to create shader program");
97 return 0;
98 }
99
100 GLC(m_context, m_context->attachShader(programObject, vertexShader));
101 GLC(m_context, m_context->attachShader(programObject, fragmentShader));
102
103 // Bind the common attrib locations.
104 GLC(m_context, m_context->bindAttribLocation(programObject, GeometryBinding::positionAttribLocation(), "a_position"));
105 GLC(m_context, m_context->bindAttribLocation(programObject, GeometryBinding::texCoordAttribLocation(), "a_texCoord"));
106
107 GLC(m_context, m_context->linkProgram(programObject));
108 int linked = 0;
109 GLC(m_context, m_context->getProgramiv(programObject, GraphicsContext3D::LINK_STATUS, &linked));
110 if (!linked) {
111 LOG_ERROR("Failed to link shader program");
112 GLC(m_context, m_context->deleteProgram(programObject));
113 return 0;
114 }
115
116 GLC(m_context, m_context->deleteShader(vertexShader));
117 GLC(m_context, m_context->deleteShader(fragmentShader));
118 return programObject;
119 }
120
121 } // namespace WebCore
122
123 #endif // USE(ACCELERATED_COMPOSITING)
124