Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "OpenGLRenderer" |
| 18 | |
| 19 | #include "Program.h" |
| 20 | |
| 21 | namespace android { |
| 22 | namespace uirenderer { |
| 23 | |
| 24 | /////////////////////////////////////////////////////////////////////////////// |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 25 | // Base program |
| 26 | /////////////////////////////////////////////////////////////////////////////// |
| 27 | |
| 28 | Program::Program(const char* vertex, const char* fragment) { |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 29 | mInitialized = false; |
| 30 | |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 31 | vertexShader = buildShader(vertex, GL_VERTEX_SHADER); |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 32 | if (vertexShader) { |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 33 | |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 34 | fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER); |
| 35 | if (fragmentShader) { |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 36 | |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 37 | id = glCreateProgram(); |
| 38 | glAttachShader(id, vertexShader); |
| 39 | glAttachShader(id, fragmentShader); |
| 40 | glLinkProgram(id); |
| 41 | |
| 42 | GLint status; |
| 43 | glGetProgramiv(id, GL_LINK_STATUS, &status); |
| 44 | if (status != GL_TRUE) { |
| 45 | LOGE("Error while linking shaders:"); |
| 46 | GLint infoLen = 0; |
| 47 | glGetProgramiv(id, GL_INFO_LOG_LENGTH, &infoLen); |
| 48 | if (infoLen > 1) { |
| 49 | GLchar log[infoLen]; |
| 50 | glGetProgramInfoLog(id, infoLen, 0, &log[0]); |
| 51 | LOGE("%s", log); |
| 52 | } |
| 53 | glDeleteShader(vertexShader); |
| 54 | glDeleteShader(fragmentShader); |
| 55 | glDeleteProgram(id); |
| 56 | } else { |
| 57 | mInitialized = true; |
| 58 | } |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 59 | } |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 60 | } |
Romain Guy | 260e102 | 2010-07-12 14:41:06 -0700 | [diff] [blame] | 61 | |
| 62 | mUse = false; |
Romain Guy | 889f8d1 | 2010-07-29 14:37:42 -0700 | [diff] [blame] | 63 | |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 64 | if (mInitialized) { |
| 65 | position = addAttrib("position"); |
| 66 | transform = addUniform("transform"); |
| 67 | } |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | Program::~Program() { |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 71 | if (mInitialized) { |
| 72 | glDeleteShader(vertexShader); |
| 73 | glDeleteShader(fragmentShader); |
| 74 | glDeleteProgram(id); |
| 75 | } |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 76 | } |
| 77 | |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 78 | int Program::addAttrib(const char* name) { |
| 79 | int slot = glGetAttribLocation(id, name); |
| 80 | attributes.add(name, slot); |
| 81 | return slot; |
| 82 | } |
| 83 | |
| 84 | int Program::getAttrib(const char* name) { |
Romain Guy | 889f8d1 | 2010-07-29 14:37:42 -0700 | [diff] [blame] | 85 | ssize_t index = attributes.indexOfKey(name); |
| 86 | if (index >= 0) { |
| 87 | return attributes.valueAt(index); |
| 88 | } |
| 89 | return addAttrib(name); |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | int Program::addUniform(const char* name) { |
| 93 | int slot = glGetUniformLocation(id, name); |
| 94 | uniforms.add(name, slot); |
| 95 | return slot; |
| 96 | } |
| 97 | |
| 98 | int Program::getUniform(const char* name) { |
Romain Guy | 889f8d1 | 2010-07-29 14:37:42 -0700 | [diff] [blame] | 99 | ssize_t index = uniforms.indexOfKey(name); |
| 100 | if (index >= 0) { |
| 101 | return uniforms.valueAt(index); |
| 102 | } |
| 103 | return addUniform(name); |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | GLuint Program::buildShader(const char* source, GLenum type) { |
| 107 | GLuint shader = glCreateShader(type); |
| 108 | glShaderSource(shader, 1, &source, 0); |
| 109 | glCompileShader(shader); |
| 110 | |
| 111 | GLint status; |
| 112 | glGetShaderiv(shader, GL_COMPILE_STATUS, &status); |
| 113 | if (status != GL_TRUE) { |
| 114 | // Some drivers return wrong values for GL_INFO_LOG_LENGTH |
| 115 | // use a fixed size instead |
| 116 | GLchar log[512]; |
| 117 | glGetShaderInfoLog(shader, sizeof(log), 0, &log[0]); |
| 118 | LOGE("Error while compiling shader: %s", log); |
| 119 | glDeleteShader(shader); |
Romain Guy | 67f2795 | 2010-12-07 20:09:23 -0800 | [diff] [blame] | 120 | return 0; |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | return shader; |
| 124 | } |
| 125 | |
Romain Guy | 889f8d1 | 2010-07-29 14:37:42 -0700 | [diff] [blame] | 126 | void Program::set(const mat4& projectionMatrix, const mat4& modelViewMatrix, |
Chet Haase | 8a5cc92 | 2011-04-26 07:28:09 -0700 | [diff] [blame^] | 127 | const mat4& transformMatrix, bool offset) { |
Romain Guy | 0b9db91 | 2010-07-09 18:53:25 -0700 | [diff] [blame] | 128 | mat4 t(projectionMatrix); |
Chet Haase | 8a5cc92 | 2011-04-26 07:28:09 -0700 | [diff] [blame^] | 129 | if (offset) { |
| 130 | // offset screenspace xy by an amount that compensates for typical precision issues |
| 131 | // in GPU hardware that tends to paint hor/vert lines in pixels shifted up and to the left. |
| 132 | // This offset value is based on an assumption that some hardware may use as little |
| 133 | // as 12.4 precision, so we offset by slightly more than 1/16. |
| 134 | t.translate(.375, .375, 0); |
| 135 | } |
Romain Guy | 0b9db91 | 2010-07-09 18:53:25 -0700 | [diff] [blame] | 136 | t.multiply(transformMatrix); |
| 137 | t.multiply(modelViewMatrix); |
| 138 | |
Romain Guy | 0b9db91 | 2010-07-09 18:53:25 -0700 | [diff] [blame] | 139 | glUniformMatrix4fv(transform, 1, GL_FALSE, &t.data[0]); |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 140 | } |
| 141 | |
Romain Guy | 707b2f7 | 2010-10-11 16:34:59 -0700 | [diff] [blame] | 142 | void Program::setColor(const float r, const float g, const float b, const float a) { |
| 143 | glUniform4f(getUniform("color"), r, g, b, a); |
| 144 | } |
| 145 | |
Romain Guy | 889f8d1 | 2010-07-29 14:37:42 -0700 | [diff] [blame] | 146 | void Program::use() { |
| 147 | glUseProgram(id); |
| 148 | mUse = true; |
| 149 | |
Romain Guy | 6926c72 | 2010-07-12 20:20:03 -0700 | [diff] [blame] | 150 | glEnableVertexAttribArray(position); |
| 151 | } |
| 152 | |
Romain Guy | 889f8d1 | 2010-07-29 14:37:42 -0700 | [diff] [blame] | 153 | void Program::remove() { |
| 154 | mUse = false; |
| 155 | |
Romain Guy | 6926c72 | 2010-07-12 20:20:03 -0700 | [diff] [blame] | 156 | glDisableVertexAttribArray(position); |
Romain Guy | f9764a4 | 2010-07-16 23:13:33 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Romain Guy | 5cbbce5 | 2010-06-27 22:59:20 -0700 | [diff] [blame] | 159 | }; // namespace uirenderer |
| 160 | }; // namespace android |