1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | /* |
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3 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
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4 | * |
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5 | */ |
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6 | #include <stdio.h> |
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7 | |
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8 | #include <GL/glew.h> |
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9 | #include <Cg/cg.h> |
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10 | #include <Cg/cgGL.h> |
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11 | |
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12 | #include <util/FilePath.h> |
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13 | |
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14 | #include "config.h" |
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15 | #include "Shader.h" |
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16 | #include "Trace.h" |
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17 | |
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18 | using namespace nv; |
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19 | using namespace nv::util; |
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20 | |
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21 | /** |
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22 | * These correspond to NV_vertex_program3 and NV_fragment_program2: |
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23 | * CG_PROFILE_VP40 |
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24 | * CG_PROFILE_FP40 |
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25 | * |
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26 | * These correspond to ARB_vertex_program and ARB_fragment_program: |
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27 | * CG_PROFILE_ARBVP1 |
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28 | * CG_PROFILE_ARBFP1 |
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29 | * |
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30 | * Generic GLSL targets: |
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31 | * CG_PROFILE_GLSLV |
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32 | * CG_PROFILE_GLSLF |
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33 | */ |
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34 | #ifdef USE_ARB_PROGRAMS |
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35 | CGprofile Shader::_defaultVertexProfile = CG_PROFILE_ARBVP1; |
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36 | CGprofile Shader::_defaultFragmentProfile = CG_PROFILE_ARBFP1; |
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37 | #else |
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38 | CGprofile Shader::_defaultVertexProfile = CG_PROFILE_VP40; |
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39 | CGprofile Shader::_defaultFragmentProfile = CG_PROFILE_FP40; |
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40 | #endif |
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41 | CGcontext Shader::_cgContext = NULL; |
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42 | |
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43 | void Shader::init() |
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44 | { |
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45 | _cgContext = cgCreateContext(); |
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46 | } |
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47 | |
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48 | void Shader::exit() |
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49 | { |
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50 | setErrorCallback(NULL); |
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51 | printErrorInfo(); |
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52 | if (_cgContext != NULL) { |
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53 | TRACE("Before DestroyContext"); |
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54 | cgDestroyContext(_cgContext); |
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55 | TRACE("After DestroyContext"); |
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56 | _cgContext = NULL; |
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57 | } |
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58 | } |
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59 | |
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60 | bool Shader::printErrorInfo() |
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61 | { |
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62 | CGerror lastError = cgGetError(); |
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63 | |
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64 | if (lastError) { |
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65 | TRACE("Cg Error: %s", cgGetErrorString(lastError)); |
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66 | if (getCgContext()) |
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67 | TRACE("%s", cgGetLastListing(getCgContext())); |
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68 | return false; |
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69 | } |
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70 | return true; |
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71 | } |
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72 | |
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73 | CGprogram |
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74 | Shader::loadCgSourceProgram(CGcontext context, const char *fileName, |
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75 | CGprofile profile, const char *entryPoint) |
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76 | { |
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77 | std::string path = FilePath::getInstance()->getPath(fileName); |
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78 | if (path.empty()) { |
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79 | ERROR("can't find program \"%s\"", fileName); |
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80 | } |
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81 | TRACE("cg program compiling: %s", path.c_str()); |
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82 | CGprogram program; |
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83 | program = cgCreateProgramFromFile(context, CG_SOURCE, path.c_str(), profile, |
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84 | entryPoint, NULL); |
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85 | cgGLLoadProgram(program); |
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86 | CGerror LastError = cgGetError(); |
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87 | if (LastError) { |
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88 | ERROR("Error message: %s", cgGetLastListing(context)); |
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89 | } |
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90 | TRACE("successfully compiled program: %s", path.c_str()); |
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91 | return program; |
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92 | } |
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93 | |
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94 | Shader::Shader(): |
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95 | _vertexProfile(_defaultVertexProfile), |
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96 | _fragmentProfile(_defaultFragmentProfile), |
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97 | _cgVP(NULL), |
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98 | _cgFP(NULL) |
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99 | { |
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100 | } |
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101 | |
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102 | Shader::~Shader() |
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103 | { |
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104 | TRACE("Enter"); |
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105 | if (_cgContext == NULL) { |
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106 | TRACE("Lost Cg context: vp: %s, fp: %s", _vpFile.c_str(), _fpFile.c_str()); |
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107 | } else { |
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108 | resetPrograms(); |
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109 | } |
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110 | } |
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111 | |
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112 | void Shader::loadVertexProgram(const char *fileName) |
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113 | { |
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114 | if (_cgVP != NULL) { |
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115 | cgDestroyProgram(_cgVP); |
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116 | } |
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117 | _cgVP = loadCgSourceProgram(_cgContext, fileName, |
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118 | _vertexProfile, "main"); |
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119 | _vpFile = fileName; |
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120 | } |
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121 | |
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122 | void Shader::loadFragmentProgram(const char *fileName) |
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123 | { |
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124 | if (_cgFP != NULL) { |
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125 | cgDestroyProgram(_cgFP); |
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126 | } |
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127 | _cgFP = loadCgSourceProgram(_cgContext, fileName, |
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128 | _fragmentProfile, "main"); |
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129 | _fpFile = fileName; |
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130 | } |
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131 | |
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132 | void Shader::resetPrograms() |
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133 | { |
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134 | if (_cgVP != NULL) { |
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135 | TRACE("Destroying vertex program: %s", _vpFile.c_str()); |
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136 | cgDestroyProgram(_cgVP); |
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137 | } |
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138 | |
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139 | if (_cgFP != NULL) { |
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140 | TRACE("Destroying fragment program: %s", _fpFile.c_str()); |
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141 | cgDestroyProgram(_cgFP); |
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142 | } |
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143 | } |
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144 | |
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145 | void Shader::setErrorCallback(ShaderCallbackFunction callback) |
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146 | { |
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147 | TRACE("Shader setting error callback to: %p", callback); |
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148 | cgSetErrorCallback(callback); |
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149 | } |
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