[4744] | 1 | /* |
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[1853] | 2 | orxonox - the future of 3D-vertical-scrollers |
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| 3 | |
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| 4 | Copyright (C) 2004 orx |
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| 5 | |
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| 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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[1855] | 10 | |
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| 11 | ### File Specific: |
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[5261] | 12 | main-programmer: Benjamin Grauer |
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[1855] | 13 | co-programmer: ... |
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[1853] | 14 | */ |
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| 15 | |
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[3955] | 16 | //#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_ |
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[1853] | 17 | |
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[5261] | 18 | #include "shader.h" |
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[1853] | 19 | |
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[5262] | 20 | #include "stdlibincl.h" |
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[5273] | 21 | #include "compiler.h" |
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[8037] | 22 | //#include <stdio.h> |
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| 23 | #include <fstream> |
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| 24 | |
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[5262] | 25 | #include "debug.h" |
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| 26 | |
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[7193] | 27 | #include "util/loading/resource_manager.h" |
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[5262] | 28 | |
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[5323] | 29 | |
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[8037] | 30 | #ifndef PARSELINELENGTH |
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| 31 | #define PARSELINELENGTH 512 //!< how many chars to read at once |
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[5262] | 32 | #endif |
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| 33 | |
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[1853] | 34 | |
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[9715] | 35 | ObjectListDefinition(Shader); |
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[1856] | 36 | |
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[3245] | 37 | /** |
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[4838] | 38 | * standard constructor |
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[3245] | 39 | */ |
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[7221] | 40 | Shader::Shader (const std::string& vertexShaderFile, const std::string& fragmentShaderFile) |
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[3365] | 41 | { |
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[9685] | 42 | this->registerObject(this, Shader::_objectList); |
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[5261] | 43 | this->shaderProgram = 0; |
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| 44 | this->vertexShader = 0; |
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| 45 | this->fragmentShader = 0; |
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[5262] | 46 | |
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[5263] | 47 | if (GLEW_ARB_shader_objects && GLEW_ARB_shading_language_100) |
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[5273] | 48 | { |
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| 49 | this->shaderProgram = glCreateProgramObjectARB(); |
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[5263] | 50 | |
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[7221] | 51 | if (!vertexShaderFile.empty()) |
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[8037] | 52 | this->loadShaderProgramm(Shader::Vertex, vertexShaderFile); |
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[7221] | 53 | if (!fragmentShaderFile.empty()) |
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[8037] | 54 | this->loadShaderProgramm(Shader::Fragment, fragmentShaderFile); |
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| 55 | |
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| 56 | this->linkShaderProgram(); |
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| 57 | |
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[5320] | 58 | } |
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[5273] | 59 | else |
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| 60 | { |
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| 61 | PRINTF(2)("Shaders are not supported on your hardware\n"); |
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| 62 | } |
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[3365] | 63 | } |
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[1853] | 64 | |
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| 65 | |
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[3245] | 66 | /** |
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[4838] | 67 | * standard deconstructor |
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[5318] | 68 | */ |
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[5261] | 69 | Shader::~Shader () |
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[3543] | 70 | { |
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[5322] | 71 | if (this->shaderProgram == glGetHandleARB(GL_PROGRAM_OBJECT_ARB)) |
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[5318] | 72 | Shader::deactivateShader(); |
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| 73 | |
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[3543] | 74 | // delete what has to be deleted here |
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[8037] | 75 | this->deleteProgram(Shader::Vertex); |
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| 76 | this->deleteProgram(Shader::Fragment); |
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[5263] | 77 | |
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[5273] | 78 | if (this->fragmentShader != 0) |
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[5322] | 79 | { |
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| 80 | glDetachObjectARB(this->shaderProgram, this->fragmentShader); |
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[5273] | 81 | glDeleteObjectARB(this->fragmentShader); |
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[5322] | 82 | } |
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[5273] | 83 | if (this->vertexShader != 0) |
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[5322] | 84 | { |
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| 85 | glDetachObjectARB(this->shaderProgram, this->vertexShader); |
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[5273] | 86 | glDeleteObjectARB(this->vertexShader); |
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[5322] | 87 | } |
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[5273] | 88 | if (this->shaderProgram != 0) |
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[5321] | 89 | { |
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| 90 | GLint status = 0; |
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[5322] | 91 | //glLinkProgramARB(this->shaderProgram); |
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[5273] | 92 | glDeleteObjectARB(this->shaderProgram); |
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[5321] | 93 | // link error checking |
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| 94 | glGetObjectParameterivARB(this->shaderProgram, GL_OBJECT_DELETE_STATUS_ARB, &status); |
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| 95 | if (status == GL_INVALID_VALUE || status == GL_INVALID_OPERATION) |
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| 96 | this->printError(this->shaderProgram); |
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| 97 | } |
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[3543] | 98 | } |
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[5261] | 99 | |
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[7221] | 100 | Shader* Shader::getShader(const std::string& vertexShaderFile, const std::string& fragmentShaderFile) |
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[5323] | 101 | { |
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[6645] | 102 | return (Shader*)ResourceManager::getInstance()->load(vertexShaderFile, SHADER, RP_LEVEL, fragmentShaderFile); |
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[5323] | 103 | } |
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| 104 | |
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| 105 | bool Shader::unload(Shader* shader) |
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| 106 | { |
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| 107 | return ResourceManager::getInstance()->unload(shader); |
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| 108 | } |
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| 109 | |
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[5317] | 110 | Shader* Shader::storedShader = NULL; |
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[5261] | 111 | |
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[5317] | 112 | |
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[8037] | 113 | bool Shader::loadShaderProgramm(Shader::Type type, const std::string& fileName) |
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[5261] | 114 | { |
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[5319] | 115 | GLhandleARB shader = 0; |
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[5285] | 116 | |
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[8037] | 117 | if (type != Shader::Vertex && type != Shader::Fragment) |
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[5261] | 118 | return false; |
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[5262] | 119 | this->deleteProgram(type); |
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[5261] | 120 | |
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| 121 | |
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[8037] | 122 | std::string program; |
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| 123 | if (!readShader(fileName, program)) |
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| 124 | return false; |
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[5318] | 125 | |
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[8037] | 126 | if (type == Shader::Vertex && GLEW_ARB_vertex_shader) |
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[5262] | 127 | { |
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[7221] | 128 | this->vertexShaderFile = fileName; |
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[5262] | 129 | |
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[5269] | 130 | shader = this->vertexShader = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB); |
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[5263] | 131 | } |
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[5262] | 132 | |
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[8037] | 133 | if (type == Shader::Fragment && GLEW_ARB_fragment_shader) |
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[5263] | 134 | { |
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[7221] | 135 | this->fragmentShaderFile = fileName; |
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[5266] | 136 | |
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[5269] | 137 | shader = this->fragmentShader = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB); |
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[5263] | 138 | } |
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[5273] | 139 | |
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| 140 | if (shader != 0) |
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[5319] | 141 | { |
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[5320] | 142 | GLint status = 0; |
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[8037] | 143 | const char* prog = program.c_str(); |
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| 144 | |
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| 145 | glShaderSourceARB(shader, 1, &prog, NULL); |
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[5320] | 146 | glCompileShaderARB(shader); |
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| 147 | // checking on error. |
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| 148 | glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &status); |
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| 149 | if (status == GL_INVALID_VALUE || status == GL_INVALID_OPERATION) |
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| 150 | this->printError(shader); |
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| 151 | else |
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| 152 | glAttachObjectARB(this->shaderProgram, shader); |
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[5319] | 153 | } |
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[8316] | 154 | return true; |
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[5261] | 155 | } |
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| 156 | |
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[8037] | 157 | |
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| 158 | void Shader::linkShaderProgram() |
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[5261] | 159 | { |
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[8037] | 160 | GLint status = 0; |
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[5266] | 161 | |
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[8037] | 162 | glLinkProgramARB(this->shaderProgram); |
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| 163 | // link error checking |
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| 164 | glGetObjectParameterivARB(this->shaderProgram, GL_OBJECT_LINK_STATUS_ARB, &status); |
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| 165 | if (status == GL_INVALID_VALUE || status == GL_INVALID_OPERATION) |
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| 166 | this->printError(this->shaderProgram); |
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| 167 | } |
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[5266] | 168 | |
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| 169 | |
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[8037] | 170 | bool Shader::readShader(const std::string& fileName, std::string& output) |
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| 171 | { |
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| 172 | char lineBuffer[PARSELINELENGTH]; |
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[5266] | 173 | |
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[8037] | 174 | std::ifstream shader; |
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| 175 | shader.open(fileName.c_str()); |
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| 176 | if (!shader.is_open()) |
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| 177 | return false; |
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[5266] | 178 | |
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[5318] | 179 | |
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[8037] | 180 | while (!shader.eof()) |
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[5318] | 181 | { |
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[8037] | 182 | shader.getline(lineBuffer, PARSELINELENGTH); |
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| 183 | output += lineBuffer; |
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| 184 | output += "\n"; |
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[5318] | 185 | } |
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| 186 | |
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[8037] | 187 | |
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| 188 | shader.close(); |
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| 189 | return true; |
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[5318] | 190 | } |
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| 191 | |
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| 192 | |
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| 193 | |
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[5266] | 194 | void Shader::activateShader() |
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| 195 | { |
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[5273] | 196 | if (likely (this->shaderProgram != 0)) |
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[5317] | 197 | { |
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[5273] | 198 | glUseProgramObjectARB(this->shaderProgram); |
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[5317] | 199 | Shader::storedShader = this; |
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| 200 | } |
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[5261] | 201 | } |
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[5262] | 202 | |
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[8255] | 203 | void Shader::bindShader(const char* name, const float* value, size_t size) |
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| 204 | { |
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| 205 | if (likely (this->shaderProgram != 0)) { |
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| 206 | glUseProgramObjectARB(this->shaderProgram); |
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| 207 | |
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| 208 | unsigned int location = glGetUniformLocationARB(this->shaderProgram, name); |
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| 209 | /* This is EXPENSIVE and should be avoided. */ |
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| 210 | |
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| 211 | if (size == 1) glUniform1fvARB(location, 1, value); |
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| 212 | else if (size == 2) glUniform2fvARB(location, 1, value); |
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| 213 | else if (size == 3) glUniform3fvARB(location, 1, value); |
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| 214 | else if (size == 4) glUniform4fvARB(location, 1, value); |
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| 215 | else if (size == 9) glUniformMatrix3fvARB(location, 1, false, value); |
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| 216 | else if (size == 16) glUniformMatrix4fvARB(location, 1, false, value); |
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| 217 | |
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| 218 | } |
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| 219 | } |
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| 220 | |
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[5266] | 221 | void Shader::deactivateShader() |
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| 222 | { |
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[5364] | 223 | if (storedShader != NULL) |
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| 224 | glUseProgramObjectARB(0); |
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| 225 | Shader::storedShader = NULL; |
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[5266] | 226 | } |
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[5262] | 227 | |
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[5266] | 228 | |
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[8037] | 229 | void Shader::deleteProgram(Shader::Type type) |
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[5262] | 230 | { |
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[5335] | 231 | GLint status = 0; |
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[8037] | 232 | if (type == Shader::Vertex && this->vertexShader != 0) |
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[5262] | 233 | { |
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[7221] | 234 | this->vertexShaderFile = ""; |
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[5321] | 235 | glDetachObjectARB(this->shaderProgram, this->vertexShader); |
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[5263] | 236 | glDeleteObjectARB(this->vertexShader); |
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[5320] | 237 | glGetObjectParameterivARB(this->vertexShader, GL_OBJECT_DELETE_STATUS_ARB, &status); |
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| 238 | if (status == GL_INVALID_VALUE || status == GL_INVALID_OPERATION) |
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| 239 | Shader::printError(this->vertexShader); |
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[5263] | 240 | this->vertexShader = 0; |
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[5262] | 241 | } |
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[8037] | 242 | else if (type == Shader::Fragment && this->fragmentShader != 0) |
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[5262] | 243 | { |
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[7221] | 244 | this->fragmentShaderFile = ""; |
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[5321] | 245 | glDetachObjectARB(this->shaderProgram, this->fragmentShader); |
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[5263] | 246 | glDeleteObjectARB(this->fragmentShader); |
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[5320] | 247 | glGetObjectParameterivARB(this->fragmentShader, GL_OBJECT_DELETE_STATUS_ARB, &status); |
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| 248 | if (status == GL_INVALID_VALUE || status == GL_INVALID_OPERATION) |
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| 249 | Shader::printError(this->fragmentShader); |
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[5263] | 250 | this->fragmentShader = 0; |
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[5262] | 251 | } |
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| 252 | else |
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| 253 | return; |
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| 254 | } |
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| 255 | |
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[5264] | 256 | |
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[5319] | 257 | void Shader::printError(GLhandleARB program) |
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[5264] | 258 | { |
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[5273] | 259 | if (program == 0) |
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| 260 | return; |
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| 261 | |
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[5267] | 262 | int infologLength = 0; |
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| 263 | int charsWritten = 0; |
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| 264 | char *infoLog; |
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| 265 | |
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| 266 | glGetObjectParameterivARB(program, GL_OBJECT_INFO_LOG_LENGTH_ARB, |
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| 267 | &infologLength); |
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| 268 | |
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| 269 | if (infologLength > 0) |
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| 270 | { |
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[5283] | 271 | infoLog = new char[infologLength+1]; |
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[5267] | 272 | glGetInfoLogARB(program, infologLength, &charsWritten, infoLog); |
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[5269] | 273 | printf("%s\n", infoLog); |
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[5283] | 274 | delete[] infoLog; |
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[5267] | 275 | } |
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[5264] | 276 | } |
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| 277 | |
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[5333] | 278 | bool Shader::checkShaderAbility() |
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| 279 | { |
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| 280 | if (GLEW_ARB_shader_objects && |
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| 281 | GLEW_ARB_shading_language_100 && |
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| 282 | GLEW_ARB_vertex_shader && |
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| 283 | GLEW_ARB_fragment_shader) |
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| 284 | return true; |
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| 285 | else |
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| 286 | return false; |
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| 287 | } |
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[5264] | 288 | |
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[5262] | 289 | void Shader::debug() const |
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| 290 | { |
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| 291 | PRINT(3)("Shader info: (SHADER: %d)\n", this->shaderProgram); |
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| 292 | if (this->vertexShader != 0) |
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| 293 | { |
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[5266] | 294 | /* PRINT(3)("VertexShaderProgramm: number=%d, file='%s'\n", this->vertexShader, this->vertexShaderFile); |
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[5262] | 295 | if (this->vertexShaderSource != NULL) |
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| 296 | for (unsigned int i = 0; i < this->vertexShaderSource->getCount(); i++) |
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| 297 | PRINT(3)("%d: %s\n", i, this->vertexShaderSource->getEntry(i)); |
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| 298 | } |
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| 299 | if (this->fragmentShader != 0) |
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| 300 | { |
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| 301 | PRINT(3)("FragmentShaderProgramm: number=%d, file='%s'\n", this->fragmentShader, this->fragmentShaderFile); |
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| 302 | if (this->fragmentShaderSource != NULL) |
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| 303 | for (unsigned int i = 0; i < this->fragmentShaderSource->getCount(); i++) |
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[5266] | 304 | PRINT(3)("%d: %s\n", i, this->fragmentShaderSource->getEntry(i));*/ |
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[5262] | 305 | } |
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| 306 | } |
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| 307 | |
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