[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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| 21 | #include <stdio.h> |
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| 22 | #include "debug.h" |
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| 23 | |
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| 24 | |
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| 25 | #ifndef PARSELINELENGHT |
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| 26 | #define PARSELINELENGHT 512 //!< how many chars to read at once |
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| 27 | #endif |
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| 28 | |
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[1856] | 29 | using namespace std; |
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[1853] | 30 | |
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[1856] | 31 | |
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[3245] | 32 | /** |
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[4838] | 33 | * standard constructor |
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[3245] | 34 | */ |
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[5262] | 35 | Shader::Shader (const char* vertexShaderFile, const char* fragmentShaderFile) |
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[3365] | 36 | { |
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[5261] | 37 | this->setClassID(CL_SHADER, "Shader"); |
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[4320] | 38 | |
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[5261] | 39 | this->fragmentShaderFile = NULL; |
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| 40 | this->vertexShaderFile = NULL; |
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| 41 | this->shaderProgram = 0; |
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| 42 | this->vertexShader = 0; |
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| 43 | this->fragmentShader = 0; |
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[5262] | 44 | |
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[5263] | 45 | if (GLEW_ARB_shader_objects && GLEW_ARB_shading_language_100) |
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[5266] | 46 | this->shaderProgram = glCreateProgramObjectARB(); |
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[5263] | 47 | |
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[5262] | 48 | if (vertexShaderFile != NULL) |
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| 49 | this->loadShaderProgramm(SHADER_VERTEX, vertexShaderFile); |
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| 50 | if (fragmentShaderFile != NULL) |
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| 51 | this->loadShaderProgramm(SHADER_FRAGMENT, fragmentShaderFile); |
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[5264] | 52 | glLinkProgramARB(this->shaderProgram); |
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| 53 | this->printError(this->shaderProgram); |
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| 54 | |
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[3365] | 55 | } |
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[1853] | 56 | |
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| 57 | |
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[3245] | 58 | /** |
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[4838] | 59 | * standard deconstructor |
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[3245] | 60 | */ |
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[5261] | 61 | Shader::~Shader () |
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[3543] | 62 | { |
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| 63 | // delete what has to be deleted here |
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[5262] | 64 | this->deleteProgram(SHADER_VERTEX); |
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| 65 | this->deleteProgram(SHADER_FRAGMENT); |
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[5263] | 66 | |
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[5267] | 67 | glDeleteObjectARB(this->fragmentShader); |
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| 68 | glDeleteObjectARB(this->vertexShader); |
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[5263] | 69 | glDeleteObjectARB(this->shaderProgram); |
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[3543] | 70 | } |
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[5261] | 71 | |
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| 72 | |
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| 73 | bool Shader::loadShaderProgramm(SHADER_TYPE type, const char* fileName) |
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| 74 | { |
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[5262] | 75 | if (type != SHADER_VERTEX && type != SHADER_FRAGMENT) |
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[5261] | 76 | return false; |
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[5262] | 77 | this->deleteProgram(type); |
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[5261] | 78 | |
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| 79 | |
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[5266] | 80 | const char* program = fileRead(fileName); |
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| 81 | |
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| 82 | if (type == SHADER_VERTEX && GLEW_ARB_vertex_shader) |
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[5262] | 83 | { |
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| 84 | this->vertexShaderFile = new char[strlen(fileName)+1]; |
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| 85 | strcpy(this->vertexShaderFile, fileName); |
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| 86 | |
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[5263] | 87 | this->vertexShader = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB); |
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[5266] | 88 | glShaderSourceARB(this->vertexShader, 1, (const GLcharARB**)&program, NULL); |
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[5263] | 89 | glCompileShaderARB(this->vertexShader); |
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| 90 | glAttachObjectARB(this->shaderProgram, this->vertexShader); |
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[5264] | 91 | this->printError(this->vertexShader); |
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[5263] | 92 | } |
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[5262] | 93 | |
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[5263] | 94 | if (type == SHADER_FRAGMENT && GLEW_ARB_fragment_shader) |
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| 95 | { |
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[5266] | 96 | this->fragmentShaderFile = new char[strlen(fileName)+1]; |
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| 97 | strcpy(this->fragmentShaderFile, fileName); |
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| 98 | |
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[5263] | 99 | this->fragmentShader = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB); |
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[5266] | 100 | glShaderSourceARB(this->fragmentShader, 1, (const GLcharARB**)&program, NULL); |
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[5263] | 101 | glCompileShaderARB(this->fragmentShader); |
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| 102 | glAttachObjectARB(this->shaderProgram, this->fragmentShader); |
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[5264] | 103 | this->printError(this->fragmentShader); |
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[5263] | 104 | } |
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[5266] | 105 | |
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| 106 | delete[] program; |
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[5261] | 107 | } |
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| 108 | |
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[5266] | 109 | |
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| 110 | char* Shader::fileRead(const char* fileName) |
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[5261] | 111 | { |
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[5266] | 112 | FILE* fileHandle; |
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| 113 | char* content = NULL; |
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| 114 | |
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| 115 | int count = 0; |
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| 116 | |
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| 117 | if (fileName != NULL) { |
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| 118 | fileHandle = fopen(fileName, "rt"); |
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| 119 | |
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| 120 | if (fileHandle != NULL) { |
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| 121 | |
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| 122 | fseek(fileHandle, 0, SEEK_END); |
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| 123 | count = ftell(fileHandle); |
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| 124 | rewind(fileHandle); |
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| 125 | |
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| 126 | if (count > 0) { |
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| 127 | content = new char[count+1]; |
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| 128 | count = fread(content, sizeof(char), count, fileHandle); |
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| 129 | content[count] = '\0'; |
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| 130 | } |
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| 131 | fclose(fileHandle); |
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| 132 | } |
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| 133 | } |
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| 134 | return content; |
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| 135 | } |
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| 136 | |
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| 137 | void Shader::activateShader() |
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| 138 | { |
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[5263] | 139 | glUseProgramObjectARB(this->shaderProgram); |
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[5261] | 140 | } |
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[5262] | 141 | |
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[5266] | 142 | void Shader::deactivateShader() |
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| 143 | { |
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| 144 | glUseProgramObjectARB(0); |
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| 145 | } |
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[5262] | 146 | |
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[5266] | 147 | |
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[5262] | 148 | void Shader::deleteProgram(SHADER_TYPE type) |
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| 149 | { |
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| 150 | if (type == SHADER_VERTEX) |
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| 151 | { |
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| 152 | delete[] this->vertexShaderFile; |
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| 153 | this->vertexShaderFile = NULL; |
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[5263] | 154 | glDeleteObjectARB(this->vertexShader); |
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| 155 | this->vertexShader = 0; |
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[5262] | 156 | } |
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| 157 | else if (type == SHADER_FRAGMENT) |
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| 158 | { |
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| 159 | delete[] this->fragmentShaderFile; |
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| 160 | this->fragmentShaderFile = NULL; |
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[5263] | 161 | glDeleteObjectARB(this->fragmentShader); |
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| 162 | this->fragmentShader = 0; |
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[5262] | 163 | } |
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| 164 | else |
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| 165 | return; |
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| 166 | } |
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| 167 | |
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[5264] | 168 | |
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| 169 | void Shader::printError(GLenum program) |
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| 170 | { |
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[5267] | 171 | int infologLength = 0; |
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| 172 | int charsWritten = 0; |
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| 173 | char *infoLog; |
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| 174 | |
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| 175 | glGetObjectParameterivARB(program, GL_OBJECT_INFO_LOG_LENGTH_ARB, |
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| 176 | &infologLength); |
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| 177 | |
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| 178 | if (infologLength > 0) |
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| 179 | { |
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| 180 | infoLog = (char *)malloc(infologLength); |
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| 181 | glGetInfoLogARB(program, infologLength, &charsWritten, infoLog); |
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| 182 | printf("%s\n",infoLog); |
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| 183 | free(infoLog); |
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| 184 | } |
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[5264] | 185 | } |
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| 186 | |
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| 187 | |
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| 188 | |
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[5262] | 189 | void Shader::debug() const |
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| 190 | { |
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| 191 | PRINT(3)("Shader info: (SHADER: %d)\n", this->shaderProgram); |
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| 192 | if (this->vertexShader != 0) |
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| 193 | { |
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[5266] | 194 | /* PRINT(3)("VertexShaderProgramm: number=%d, file='%s'\n", this->vertexShader, this->vertexShaderFile); |
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[5262] | 195 | if (this->vertexShaderSource != NULL) |
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| 196 | for (unsigned int i = 0; i < this->vertexShaderSource->getCount(); i++) |
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| 197 | PRINT(3)("%d: %s\n", i, this->vertexShaderSource->getEntry(i)); |
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| 198 | } |
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| 199 | if (this->fragmentShader != 0) |
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| 200 | { |
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| 201 | PRINT(3)("FragmentShaderProgramm: number=%d, file='%s'\n", this->fragmentShader, this->fragmentShaderFile); |
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| 202 | if (this->fragmentShaderSource != NULL) |
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| 203 | for (unsigned int i = 0; i < this->fragmentShaderSource->getCount(); i++) |
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[5266] | 204 | PRINT(3)("%d: %s\n", i, this->fragmentShaderSource->getEntry(i));*/ |
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[5262] | 205 | } |
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| 206 | |
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| 207 | |
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| 208 | } |
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| 209 | |
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