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 "Shader.h" |
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15 | #include "Trace.h" |
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16 | |
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17 | using namespace nv; |
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18 | using namespace nv::util; |
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19 | |
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20 | CGprofile Shader::_defaultVertexProfile = CG_PROFILE_VP40; |
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21 | CGprofile Shader::_defaultFragmentProfile = CG_PROFILE_FP40; |
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22 | CGcontext Shader::_cgContext = NULL; |
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23 | |
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24 | void Shader::initCg(CGprofile defaultVertexProfile, |
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25 | CGprofile defaultFragmentProfile) |
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26 | { |
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27 | _defaultVertexProfile = defaultVertexProfile; |
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28 | _defaultFragmentProfile = defaultFragmentProfile; |
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29 | _cgContext = cgCreateContext(); |
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30 | } |
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31 | |
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32 | void Shader::exitCg() |
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33 | { |
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34 | setErrorCallback(NULL); |
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35 | printErrorInfo(); |
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36 | if (_cgContext != NULL) { |
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37 | TRACE("Before DestroyContext"); |
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38 | cgDestroyContext(_cgContext); |
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39 | TRACE("After DestroyContext"); |
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40 | _cgContext = NULL; |
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41 | } |
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42 | } |
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43 | |
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44 | bool Shader::printErrorInfo() |
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45 | { |
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46 | CGerror lastError = cgGetError(); |
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47 | |
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48 | if (lastError) { |
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49 | TRACE("Cg Error: %s", cgGetErrorString(lastError)); |
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50 | if (getCgContext()) |
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51 | TRACE("%s", cgGetLastListing(getCgContext())); |
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52 | return false; |
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53 | } |
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54 | return true; |
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55 | } |
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56 | |
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57 | CGprogram |
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58 | Shader::loadCgSourceProgram(CGcontext context, const char *fileName, |
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59 | CGprofile profile, const char *entryPoint) |
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60 | { |
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61 | std::string path = FilePath::getInstance()->getPath(fileName); |
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62 | if (path.empty()) { |
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63 | ERROR("can't find program \"%s\"", fileName); |
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64 | } |
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65 | TRACE("cg program compiling: %s", path.c_str()); |
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66 | CGprogram program; |
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67 | program = cgCreateProgramFromFile(context, CG_SOURCE, path.c_str(), profile, |
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68 | entryPoint, NULL); |
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69 | cgGLLoadProgram(program); |
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70 | CGerror LastError = cgGetError(); |
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71 | if (LastError) { |
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72 | ERROR("Error message: %s", cgGetLastListing(context)); |
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73 | } |
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74 | TRACE("successfully compiled program: %s", path.c_str()); |
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75 | return program; |
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76 | } |
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77 | |
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78 | Shader::Shader(): |
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79 | _vertexProfile(_defaultVertexProfile), |
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80 | _fragmentProfile(_defaultFragmentProfile), |
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81 | _cgVP(NULL), |
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82 | _cgFP(NULL) |
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83 | { |
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84 | } |
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85 | |
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86 | Shader::~Shader() |
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87 | { |
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88 | TRACE("Enter"); |
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89 | if (_cgContext == NULL) { |
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90 | TRACE("Lost Cg context: vp: %s, fp: %s", _vpFile.c_str(), _fpFile.c_str()); |
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91 | } else { |
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92 | resetPrograms(); |
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93 | } |
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94 | } |
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95 | |
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96 | void Shader::loadVertexProgram(const char *fileName, const char *entryPoint) |
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97 | { |
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98 | if (_cgVP != NULL) { |
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99 | cgDestroyProgram(_cgVP); |
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100 | } |
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101 | _cgVP = loadCgSourceProgram(_cgContext, fileName, |
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102 | _vertexProfile, entryPoint); |
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103 | _vpFile = fileName; |
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104 | } |
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105 | |
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106 | void Shader::loadFragmentProgram(const char *fileName, const char *entryPoint) |
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107 | { |
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108 | if (_cgFP != NULL) { |
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109 | cgDestroyProgram(_cgFP); |
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110 | } |
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111 | _cgFP = loadCgSourceProgram(_cgContext, fileName, |
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112 | _fragmentProfile, entryPoint); |
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113 | _fpFile = fileName; |
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114 | } |
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115 | |
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116 | void Shader::resetPrograms() |
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117 | { |
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118 | if (_cgVP != NULL) { |
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119 | TRACE("Destroying vertex program: %s", _vpFile.c_str()); |
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120 | cgDestroyProgram(_cgVP); |
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121 | } |
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122 | |
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123 | if (_cgFP != NULL) { |
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124 | TRACE("Destroying fragment program: %s", _fpFile.c_str()); |
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125 | cgDestroyProgram(_cgFP); |
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126 | } |
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127 | } |
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128 | |
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129 | void Shader::setErrorCallback(CgCallbackFunction callback) |
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130 | { |
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131 | TRACE("Shader setting error callback to: %p", callback); |
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132 | cgSetErrorCallback(callback); |
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133 | } |
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