1 | #include "DeferredRenderer.h"
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2 | #include "FrameBufferObject.h"
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3 | #include "RenderState.h"
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4 | #include "SampleGenerator.h"
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5 | #include "Vector3.h"
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6 | #include "Camera.h"
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7 | #include "shaderenv.h"
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8 | #include "Halton.h"
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9 | #include "ShadowMapping.h"
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10 | #include "Light.h"
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11 |
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12 | #include <IL/il.h>
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13 | #include <assert.h>
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14 |
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15 |
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16 | using namespace std;
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17 |
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18 |
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19 | static void startil()
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20 | {
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21 | ilInit();
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22 | assert(ilGetError() == IL_NO_ERROR);
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23 | }
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24 |
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25 |
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26 | static void stopil()
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27 | {
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28 | ilShutDown();
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29 | assert(ilGetError() == IL_NO_ERROR);
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30 | }
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31 |
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32 | namespace CHCDemoEngine
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33 | {
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34 |
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35 | static CGprogram sCgSsaoProgram = NULL;
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36 | static CGprogram sCgGiProgram = NULL;
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37 |
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38 | static CGprogram sCgDeferredProgram = NULL;
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39 | static CGprogram sCgAntiAliasingProgram = NULL;
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40 | static CGprogram sCgDeferredShadowProgram = NULL;
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41 |
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42 | static CGparameter sColorsTexCombineParam;
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43 | static CGparameter sSsaoTexCombineParam;
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44 |
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45 | static CGparameter sColorsTexDeferredParam;
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46 | static CGparameter sPositionsTexDeferredParam;
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47 | static CGparameter sNormalsTexDeferredParam;
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48 |
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49 | static CGprogram sCgCombinedSsaoProgram = NULL;
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50 | static CGprogram sCgCombinedIllumProgram = NULL;
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51 |
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52 | static CGparameter sColorsTexLogLumParam;
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53 |
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54 | static CGparameter sDownSampleOffsetParam;
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55 | static CGparameter sFilterOffsetsParam;
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56 | static CGparameter sFilterWeightsParam;
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57 |
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58 | static CGprogram sCgDownSampleProgram;
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59 | static CGprogram sCgToneProgram;
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60 | static CGprogram sCgLogLumProgram;
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61 |
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62 |
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63 | ShaderContainer DeferredRenderer::sShaders;
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64 |
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65 | ///////////////////////////////////////
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66 |
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67 |
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68 | static CGparameter sColorsTexParam;
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69 | static CGparameter sNormalsTexParam;
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70 |
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71 | static CGparameter sOldModelViewProjMatrixParam;
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72 | static CGparameter sModelViewProjMatrixParam;
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73 | static CGparameter sEyePosParam;
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74 | static CGparameter sEyePosShadowParam;
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75 | static CGparameter sSamplesParam;
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76 | static CGparameter sOldTexParam;
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77 | static CGparameter sNoiseTexParam;
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78 | static CGparameter sTemporalCoherenceParam;
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79 |
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80 |
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81 | ///////////////////////////////////////
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82 |
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83 |
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84 | static CGparameter sColorsTexGiParam;
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85 | static CGparameter sNormalsTexGiParam;
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86 |
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87 |
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88 | static CGparameter sOldModelViewProjMatrixGiParam;
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89 | static CGparameter sModelViewProjMatrixGiParam;
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90 | static CGparameter sSamplesGiParam;
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91 | static CGparameter sOldSsaoTexGiParam;
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92 | static CGparameter sOldIllumTexGiParam;
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93 | static CGparameter sNoiseTexGiParam;
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94 | static CGparameter sTemporalCoherenceGiParam;
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95 |
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96 |
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97 | static CGparameter sColorsTexCombinedIllumParam;
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98 | static CGparameter sSsaoTexCombinedIllumParam;
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99 | static CGparameter sIllumTexCombinedIllumParam;
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100 |
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101 | static CGparameter sColorsTexCombinedSsaoParam;
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102 | static CGparameter sSsaoTexCombinedSsaoParam;
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103 |
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104 | static CGparameter sTLParam;
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105 | static CGparameter sTRParam;
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106 | static CGparameter sBRParam;
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107 | static CGparameter sBLParam;
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108 |
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109 |
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110 | static CGparameter sTLGiParam;
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111 | static CGparameter sTRGiParam;
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112 | static CGparameter sBRGiParam;
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113 | static CGparameter sBLGiParam;
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114 |
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115 | static CGparameter sEyePosGiParam;
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116 |
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117 |
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118 |
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119 | ////////////
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120 |
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121 | static CGparameter sColorsTexAntiAliasingParam;
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122 | static CGparameter sNormalsTexAntiAliasingParam;
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123 |
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124 |
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125 | static CGparameter sShadowMapParam;
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126 | static CGparameter sPositionsTexShadowParam;
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127 | static CGparameter sColorsTexShadowParam;
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128 | static CGparameter sNormalsTexShadowParam;
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129 |
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130 | static CGparameter sShadowMatrixParam;
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131 | static CGparameter sSampleWidthParam;
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132 |
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133 | static CGparameter sNoiseTexShadowParam;
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134 | static CGparameter sSamplesShadowParam;
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135 |
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136 | static CGparameter sLightDirParam;
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137 | static CGparameter sLightDirShadowParam;
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138 | static CGparameter sImageKeyParam;
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139 | static CGparameter sMiddleGreyParam;
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140 | static CGparameter sWhiteLumParam;
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141 |
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142 |
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143 | static CGparameter sColorsTexInitialParam;
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144 | static CGparameter sColorsTexToneParam;
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145 |
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146 | static CGparameter sColorsTexDownSampleParam;
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147 |
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148 | //#define USE_3D_SSAO
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149 |
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150 |
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151 | static GLuint noiseTex = 0;
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152 |
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153 | // ssao random spherical samples
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154 | #ifdef USE_3D_SSAO
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155 | static Sample2 samples3[NUM_SAMPLES];
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156 | #else
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157 | static Sample2 samples2[NUM_SAMPLES];
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158 | #endif
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159 |
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160 | // number of pcf tabs
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161 | Sample2 pcfSamples[NUM_PCF_TABS];
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162 |
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163 | int DeferredRenderer::colorBufferIdx = 0;
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164 |
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165 |
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166 | static void PrintGLerror(char *msg)
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167 | {
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168 | GLenum errCode;
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169 | const GLubyte *errStr;
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170 |
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171 | if ((errCode = glGetError()) != GL_NO_ERROR)
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172 | {
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173 | errStr = gluErrorString(errCode);
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174 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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175 | }
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176 | }
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177 |
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178 | static void ComputeSampleOffsets(float *sampleOffsets, int w, int h)
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179 | {
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180 | /*
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181 | const float xoffs = 0.5f / w;
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182 | const float yoffs = 0.5f / h;
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183 |
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184 | sampleOffsets[0] = xoffs; sampleOffsets[1] = yoffs;
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185 | sampleOffsets[2] = xoffs; sampleOffsets[3] = -yoffs;
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186 | sampleOffsets[4] = -xoffs; sampleOffsets[5] = -yoffs;
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187 | sampleOffsets[6] = -xoffs; sampleOffsets[7] = yoffs;
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188 | */
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189 | //const float xoffs = .5f / w;
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190 | //const float yoffs = .5f / h;
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191 |
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192 | const float xoffs = 1.0f / w;
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193 | const float yoffs = 1.0f / h;
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194 |
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195 | int idx = 0;
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196 |
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197 | for (int x = -1; x <= 1; ++ x)
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198 | {
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199 | for (int y = -1; y <= 1; ++ y)
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200 | {
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201 | sampleOffsets[idx + 0] = x * xoffs;
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202 | sampleOffsets[idx + 1] = y * yoffs;
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203 |
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204 | idx += 2;
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205 | }
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206 | }
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207 | }
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208 |
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209 | /** Generate poisson disc distributed sample points on the unit disc
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210 | */
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211 | static void GenerateSamples(int sampling)
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212 | {
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213 | #ifdef USE_3D_SSAO
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214 |
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215 | SphericalSampleGenerator sph(NUM_SAMPLES, 1.0f);
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216 | sph.Generate((float *)samples3);
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217 |
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218 | #else
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219 | switch (sampling)
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220 | {
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221 | case DeferredRenderer::SAMPLING_POISSON:
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222 | {
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223 | PoissonDiscSampleGenerator2 poisson(NUM_SAMPLES, 1.0f);
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224 | poisson.Generate((float *)samples2);
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225 | }
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226 | break;
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227 | case DeferredRenderer::SAMPLING_QUADRATIC:
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228 | {
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229 | QuadraticDiscSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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230 | g.Generate((float *)samples2);
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231 | }
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232 | break;
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233 | default: // SAMPLING_DEFAULT
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234 |
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235 | RandomSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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236 | g.Generate((float *)samples2);
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237 | }
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238 | #endif
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239 | }
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240 |
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241 |
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242 | static void CreateNoiseTex2D(int w, int h)
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243 | {
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244 | //GLubyte *randomNormals = new GLubyte[mWidth * mHeight * 3];
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245 | float *randomNormals = new float[w * h * 3];
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246 |
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247 | static HaltonSequence halton;
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248 | float r[2];
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249 |
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250 | for (int i = 0; i < w * h * 3; i += 3)
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251 | {
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252 |
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253 | #ifdef USE_3D_SSAO
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254 | //halton.GetNext(2, r);
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255 | r[0] = RandomValue(0, 1);
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256 | r[1] = RandomValue(0, 1);
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257 |
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258 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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259 | const float phi = 2.0f * M_PI * r[1];
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260 |
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261 | randomNormals[i + 0] = sin(theta) * cos(phi);
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262 | randomNormals[i + 1] = sin(theta) * sin(phi);
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263 | randomNormals[i + 2] = cos(theta);
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264 | #else
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265 | // create random samples on a circle
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266 | r[0] = RandomValue(0, 1);
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267 | //halton.GetNext(1, r);
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268 |
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269 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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270 |
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271 | randomNormals[i + 0] = cos(theta);
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272 | randomNormals[i + 1] = sin(theta);
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273 | randomNormals[i + 2] = 0;
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274 | #endif
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275 | }
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276 |
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277 | glEnable(GL_TEXTURE_2D);
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278 | glGenTextures(1, &noiseTex);
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279 | glBindTexture(GL_TEXTURE_2D, noiseTex);
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280 |
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281 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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282 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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283 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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284 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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285 |
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286 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGB, GL_FLOAT, randomNormals);
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287 |
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288 | glBindTexture(GL_TEXTURE_2D, 0);
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289 | glDisable(GL_TEXTURE_2D);
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290 |
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291 | delete [] randomNormals;
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292 |
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293 | cout << "created noise texture" << endl;
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294 |
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295 | PrintGLerror("noisetexture");
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296 | }
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297 |
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298 |
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299 | static void InitBuffer(FrameBufferObject *fbo, int index)
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300 | {
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301 | // read the second buffer, write to the first buffer
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302 | fbo->Bind();
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303 | glDrawBuffers(1, mrt + index);
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304 |
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305 | //glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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306 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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307 |
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308 | glEnd();
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309 |
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310 | FrameBufferObject::Release();
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311 | }
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312 |
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313 |
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314 | DeferredRenderer::DeferredRenderer(int w, int h, Camera *cam, float scaleFactor):
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315 | mWidth(w), mHeight(h),
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316 | mCamera(cam),
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317 | mUseTemporalCoherence(true),
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318 | mRegenerateSamples(true),
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319 | mSamplingMethod(SAMPLING_POISSON),
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320 | mShadingMethod(DEFAULT),
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321 | mIllumFboIndex(0)
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322 | {
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323 | // create noise texture for ssao
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324 | CreateNoiseTex2D(w, h);
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325 |
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326 |
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327 | ///////////
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328 | //-- the flip-flop fbos
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329 |
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330 | mIllumFbo = new FrameBufferObject(w / 2, h / 2, FrameBufferObject::DEPTH_NONE);
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331 | mFBOs.push_back(mIllumFbo);
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332 |
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333 | for (int i = 0; i < 4; ++ i)
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334 | {
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335 | mIllumFbo->AddColorBuffer(ColorBufferObject::RGB_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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336 | InitBuffer(mIllumFbo, i);
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337 | }
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338 |
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339 | mDownSampleFbo = new FrameBufferObject(w / 2, h / 2, FrameBufferObject::DEPTH_NONE);
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340 | mDownSampleFbo->AddColorBuffer(ColorBufferObject::RGBA_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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341 | mDownSampleFbo->AddColorBuffer(ColorBufferObject::RGB_FLOAT_16, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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342 |
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343 | mFBOs.push_back(mDownSampleFbo);
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344 | }
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345 |
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346 |
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347 | DeferredRenderer::~DeferredRenderer()
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348 | {
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349 | CLEAR_CONTAINER(sShaders);
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350 | CLEAR_CONTAINER(mFBOs);
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351 |
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352 | glDeleteTextures(1, &noiseTex);
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353 | }
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354 |
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355 |
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356 | void DeferredRenderer::SetUseTemporalCoherence(bool temporal)
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357 | {
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358 | mUseTemporalCoherence = temporal;
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359 | }
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360 |
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361 |
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362 | void DeferredRenderer::Init(CGcontext context)
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363 | {
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364 | ShaderProgram *pr;
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365 |
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366 |
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367 | sCgDeferredProgram =
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368 | cgCreateProgramFromFile(context,
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369 | CG_SOURCE,
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370 | "src/shaders/deferred.cg",
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371 | RenderState::sCgFragmentProfile,
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372 | "main",
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373 | NULL);
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374 |
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375 | if (sCgDeferredProgram != NULL)
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376 | {
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377 | cgGLLoadProgram(sCgDeferredProgram);
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378 |
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379 | // we need size of texture for scaling
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380 | sPositionsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "positions");
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381 | sColorsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "colors");
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382 | sNormalsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "normals");
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383 |
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384 | sLightDirParam = cgGetNamedParameter(sCgDeferredProgram, "lightDir");
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385 |
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386 | pr = new ShaderProgram(sCgDeferredProgram);
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387 | sShaders.push_back(pr);
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388 | }
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389 | else
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390 | cerr << "deferred program failed to load" << endl;
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391 |
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392 |
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393 | ///////////////
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394 |
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395 | sCgSsaoProgram =
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396 | cgCreateProgramFromFile(context,
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397 | CG_SOURCE,
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398 | #ifdef USE_3D_SSAO
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399 | "src/shaders/ssao3d.cg",
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400 | #else
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401 | "src/shaders/ssao.cg",
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402 | #endif
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403 | RenderState::sCgFragmentProfile,
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404 | "main",
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405 | NULL);
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406 |
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407 | if (sCgSsaoProgram != NULL)
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408 | {
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409 | cgGLLoadProgram(sCgSsaoProgram);
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410 |
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411 | sColorsTexParam = cgGetNamedParameter(sCgSsaoProgram, "colors");
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412 | sEyePosParam = cgGetNamedParameter(sCgSsaoProgram, "eyePos");
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413 | sNormalsTexParam = cgGetNamedParameter(sCgSsaoProgram, "normals");
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414 | sNoiseTexParam = cgGetNamedParameter(sCgSsaoProgram, "noiseTexture");
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415 |
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416 | sOldModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "oldModelViewProj");
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417 | sModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "modelViewProj");
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418 | sTemporalCoherenceParam = cgGetNamedParameter(sCgSsaoProgram, "temporalCoherence");
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419 |
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420 | sOldTexParam = cgGetNamedParameter(sCgSsaoProgram, "oldTex");
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421 | sSamplesParam = cgGetNamedParameter(sCgSsaoProgram, "samples");
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422 |
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423 | sTLParam = cgGetNamedParameter(sCgSsaoProgram, "tl");
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424 | sTRParam = cgGetNamedParameter(sCgSsaoProgram, "tr");
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425 | sBRParam = cgGetNamedParameter(sCgSsaoProgram, "br");
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426 | sBLParam = cgGetNamedParameter(sCgSsaoProgram, "bl");
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427 |
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428 | pr = new ShaderProgram(sCgSsaoProgram);
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429 | sShaders.push_back(pr);
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430 | }
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431 | else
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432 | cerr << "ssao program failed to load" << endl;
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433 |
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434 | sCgGiProgram =
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435 | cgCreateProgramFromFile(context,
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436 | CG_SOURCE,
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437 | "src/shaders/globillum.cg",
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438 | RenderState::sCgFragmentProfile,
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439 | "main",
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440 | NULL);
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441 |
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442 | if (sCgGiProgram != NULL)
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443 | {
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444 | cgGLLoadProgram(sCgGiProgram);
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445 |
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446 | // we need size of texture for scaling
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447 | sColorsTexGiParam = cgGetNamedParameter(sCgGiProgram, "colors");
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448 | sNormalsTexGiParam = cgGetNamedParameter(sCgGiProgram, "normals");
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449 |
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450 | sOldModelViewProjMatrixGiParam = cgGetNamedParameter(sCgGiProgram, "oldModelViewProj");
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451 | sModelViewProjMatrixGiParam = cgGetNamedParameter(sCgGiProgram, "modelViewProj");
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452 | sTemporalCoherenceGiParam = cgGetNamedParameter(sCgGiProgram, "temporalCoherence");
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453 |
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454 | sNoiseTexGiParam = cgGetNamedParameter(sCgGiProgram, "noiseTexture");
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455 | sSamplesGiParam = cgGetNamedParameter(sCgGiProgram, "samples");
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456 |
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457 | sOldSsaoTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldSsaoTex");
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458 | sOldIllumTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldIllumTex");
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459 |
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460 | sTLGiParam = cgGetNamedParameter(sCgGiProgram, "tl");
|
---|
461 | sTRGiParam = cgGetNamedParameter(sCgGiProgram, "tr");
|
---|
462 | sBRGiParam = cgGetNamedParameter(sCgGiProgram, "br");
|
---|
463 | sBLGiParam = cgGetNamedParameter(sCgGiProgram, "bl");
|
---|
464 |
|
---|
465 | sEyePosGiParam = cgGetNamedParameter(sCgGiProgram, "eyePos");
|
---|
466 |
|
---|
467 | pr = new ShaderProgram(sCgGiProgram);
|
---|
468 | sShaders.push_back(pr);
|
---|
469 | }
|
---|
470 | else
|
---|
471 | cerr << "globillum program failed to load" << endl;
|
---|
472 |
|
---|
473 | sCgCombinedIllumProgram =
|
---|
474 | cgCreateProgramFromFile(context,
|
---|
475 | CG_SOURCE,
|
---|
476 | "src/shaders/globillum.cg",
|
---|
477 | RenderState::sCgFragmentProfile,
|
---|
478 | "combine",
|
---|
479 | NULL);
|
---|
480 |
|
---|
481 | if (sCgCombinedIllumProgram != NULL)
|
---|
482 | {
|
---|
483 | cgGLLoadProgram(sCgCombinedIllumProgram);
|
---|
484 |
|
---|
485 | sColorsTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "colors");
|
---|
486 | sSsaoTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "ssaoTex");
|
---|
487 | sIllumTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "illumTex");
|
---|
488 |
|
---|
489 | pr = new ShaderProgram(sCgCombinedIllumProgram);
|
---|
490 | sShaders.push_back(pr);
|
---|
491 | }
|
---|
492 | else
|
---|
493 | cerr << "combined illum program failed to load" << endl;
|
---|
494 |
|
---|
495 |
|
---|
496 | sCgCombinedSsaoProgram =
|
---|
497 | cgCreateProgramFromFile(context,
|
---|
498 | CG_SOURCE,
|
---|
499 | "src/shaders/ssao.cg",
|
---|
500 | RenderState::sCgFragmentProfile,
|
---|
501 | "combine",
|
---|
502 | NULL);
|
---|
503 |
|
---|
504 | if (sCgCombinedSsaoProgram != NULL)
|
---|
505 | {
|
---|
506 | cgGLLoadProgram(sCgCombinedSsaoProgram);
|
---|
507 |
|
---|
508 | sColorsTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "colors");
|
---|
509 | sSsaoTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "ssaoTex");
|
---|
510 |
|
---|
511 | sFilterOffsetsParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "filterOffs");
|
---|
512 | sFilterWeightsParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "filterWeights");
|
---|
513 |
|
---|
514 | pr = new ShaderProgram(sCgCombinedSsaoProgram);
|
---|
515 | sShaders.push_back(pr);
|
---|
516 | }
|
---|
517 | else
|
---|
518 | cerr << "combied illum program failed to load" << endl;
|
---|
519 |
|
---|
520 |
|
---|
521 | sCgAntiAliasingProgram =
|
---|
522 | cgCreateProgramFromFile(context,
|
---|
523 | CG_SOURCE,
|
---|
524 | "src/shaders/antialiasing.cg",
|
---|
525 | RenderState::sCgFragmentProfile,
|
---|
526 | "main",
|
---|
527 | NULL);
|
---|
528 |
|
---|
529 | if (sCgAntiAliasingProgram != NULL)
|
---|
530 | {
|
---|
531 | cgGLLoadProgram(sCgAntiAliasingProgram);
|
---|
532 |
|
---|
533 | sColorsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "colors");
|
---|
534 | sNormalsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "normals");
|
---|
535 |
|
---|
536 | pr = new ShaderProgram(sCgAntiAliasingProgram);
|
---|
537 | sShaders.push_back(pr);
|
---|
538 | }
|
---|
539 | else
|
---|
540 | cerr << "antialiasing program failed to load" << endl;
|
---|
541 |
|
---|
542 | sCgDeferredShadowProgram =
|
---|
543 | cgCreateProgramFromFile(context,
|
---|
544 | CG_SOURCE,
|
---|
545 | "src/shaders/deferred.cg",
|
---|
546 | RenderState::sCgFragmentProfile,
|
---|
547 | "main_shadow",
|
---|
548 | NULL);
|
---|
549 |
|
---|
550 | if (sCgDeferredShadowProgram != NULL)
|
---|
551 | {
|
---|
552 | cgGLLoadProgram(sCgDeferredShadowProgram);
|
---|
553 |
|
---|
554 | // we need size of texture for scaling
|
---|
555 | sPositionsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "positions");
|
---|
556 | sColorsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "colors");
|
---|
557 | sNormalsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "normals");
|
---|
558 |
|
---|
559 | sShadowMapParam = cgGetNamedParameter(sCgDeferredShadowProgram, "shadowMap");
|
---|
560 | sSampleWidthParam = cgGetNamedParameter(sCgDeferredShadowProgram, "sampleWidth");
|
---|
561 | sShadowMatrixParam = cgGetNamedParameter(sCgDeferredShadowProgram, "shadowMatrix");
|
---|
562 |
|
---|
563 | sNoiseTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "noiseTexture");
|
---|
564 | sSamplesShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "samples");
|
---|
565 | sLightDirShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "lightDir");
|
---|
566 |
|
---|
567 | sEyePosShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "eyePos");
|
---|
568 |
|
---|
569 | PoissonDiscSampleGenerator2 poisson(NUM_PCF_TABS, 1.0f);
|
---|
570 | poisson.Generate((float *)pcfSamples);
|
---|
571 |
|
---|
572 | cgGLSetParameterArray2f(sSamplesShadowParam, 0, NUM_PCF_TABS, (const float *)pcfSamples);
|
---|
573 |
|
---|
574 | pr = new ShaderProgram(sCgDeferredShadowProgram);
|
---|
575 | sShaders.push_back(pr);
|
---|
576 | }
|
---|
577 | else
|
---|
578 | cerr << "deferred program failed to load" << endl;
|
---|
579 |
|
---|
580 | sCgLogLumProgram =
|
---|
581 | cgCreateProgramFromFile(context,
|
---|
582 | CG_SOURCE,
|
---|
583 | "src/shaders/tonemap.cg",
|
---|
584 | RenderState::sCgFragmentProfile,
|
---|
585 | "CalcAvgLogLum",
|
---|
586 | NULL);
|
---|
587 |
|
---|
588 | if (sCgLogLumProgram != NULL)
|
---|
589 | {
|
---|
590 | cgGLLoadProgram(sCgLogLumProgram);
|
---|
591 | sColorsTexLogLumParam = cgGetNamedParameter(sCgLogLumProgram, "colors");
|
---|
592 |
|
---|
593 | pr = new ShaderProgram(sCgLogLumProgram);
|
---|
594 | sShaders.push_back(pr);
|
---|
595 | }
|
---|
596 | else
|
---|
597 | cerr << "avg loglum program failed to load" << endl;
|
---|
598 |
|
---|
599 |
|
---|
600 | sCgToneProgram =
|
---|
601 | cgCreateProgramFromFile(context,
|
---|
602 | CG_SOURCE,
|
---|
603 | "src/shaders/tonemap.cg",
|
---|
604 | RenderState::sCgFragmentProfile,
|
---|
605 | "ToneMap",
|
---|
606 | NULL);
|
---|
607 |
|
---|
608 | if (sCgToneProgram != NULL)
|
---|
609 | {
|
---|
610 | cgGLLoadProgram(sCgToneProgram);
|
---|
611 |
|
---|
612 | sImageKeyParam = cgGetNamedParameter(sCgToneProgram, "imageKey");
|
---|
613 | sMiddleGreyParam = cgGetNamedParameter(sCgToneProgram, "middleGrey");
|
---|
614 | sWhiteLumParam = cgGetNamedParameter(sCgToneProgram, "whiteLum");
|
---|
615 |
|
---|
616 | sColorsTexToneParam = cgGetNamedParameter(sCgToneProgram, "colors");
|
---|
617 |
|
---|
618 | pr = new ShaderProgram(sCgToneProgram);
|
---|
619 | sShaders.push_back(pr);
|
---|
620 | }
|
---|
621 | else
|
---|
622 | cerr << "tone program failed to load" << endl;
|
---|
623 |
|
---|
624 |
|
---|
625 | sCgDownSampleProgram =
|
---|
626 | cgCreateProgramFromFile(context,
|
---|
627 | CG_SOURCE,
|
---|
628 | "src/shaders/tonemap.cg",
|
---|
629 | RenderState::sCgFragmentProfile,
|
---|
630 | "DownSample",
|
---|
631 | NULL);
|
---|
632 |
|
---|
633 | if (sCgDownSampleProgram != NULL)
|
---|
634 | {
|
---|
635 | cgGLLoadProgram(sCgDownSampleProgram);
|
---|
636 |
|
---|
637 | // we need size of texture for scaling
|
---|
638 | sColorsTexDownSampleParam = cgGetNamedParameter(sCgDownSampleProgram, "colors");
|
---|
639 | sDownSampleOffsetParam = cgGetNamedParameter(sCgDownSampleProgram, "downSampleOffs");
|
---|
640 |
|
---|
641 | pr = new ShaderProgram(sCgDownSampleProgram);
|
---|
642 | sShaders.push_back(pr);
|
---|
643 | }
|
---|
644 | else
|
---|
645 | cerr << "downsample program failed to load" << endl;
|
---|
646 |
|
---|
647 | PrintGLerror("init");
|
---|
648 | }
|
---|
649 |
|
---|
650 |
|
---|
651 | void DeferredRenderer::Render(FrameBufferObject *fbo,
|
---|
652 | const Matrix4x4 &oldProjViewMatrix,
|
---|
653 | const Matrix4x4 &projViewMatrix,
|
---|
654 | float tempCohFactor,
|
---|
655 | DirectionalLight *light,
|
---|
656 | bool useToneMapping,
|
---|
657 | ShadowMap *shadowMap
|
---|
658 | )
|
---|
659 | {
|
---|
660 | // switch roles of old and new fbo
|
---|
661 | // the algorihm uses two input fbos, where the one
|
---|
662 | // contais the color buffer from the last frame,
|
---|
663 | // the other one will be written
|
---|
664 |
|
---|
665 | mIllumFboIndex = 2 - mIllumFboIndex;
|
---|
666 |
|
---|
667 |
|
---|
668 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
669 |
|
---|
670 | glDisable(GL_ALPHA_TEST);
|
---|
671 | glDisable(GL_TEXTURE_2D);
|
---|
672 | glDisable(GL_LIGHTING);
|
---|
673 | glDisable(GL_BLEND);
|
---|
674 | glDisable(GL_DEPTH_TEST);
|
---|
675 |
|
---|
676 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
677 | glViewport(0, 0, mWidth, mHeight);
|
---|
678 |
|
---|
679 | glMatrixMode(GL_PROJECTION);
|
---|
680 | glPushMatrix();
|
---|
681 | glLoadIdentity();
|
---|
682 |
|
---|
683 | const float offs = 0.5f;
|
---|
684 | glOrtho(-offs, offs, -offs, offs, 0, 1);
|
---|
685 |
|
---|
686 | glMatrixMode(GL_MODELVIEW);
|
---|
687 | glPushMatrix();
|
---|
688 | glLoadIdentity();
|
---|
689 |
|
---|
690 | if (shadowMap)
|
---|
691 | FirstPassShadow(fbo, light, shadowMap);
|
---|
692 | else
|
---|
693 | FirstPass(fbo, light);
|
---|
694 |
|
---|
695 | switch (mShadingMethod)
|
---|
696 | {
|
---|
697 | case SSAO:
|
---|
698 | // downsample fbo buffers for colors, normals
|
---|
699 | DownSample(fbo, colorBufferIdx, mDownSampleFbo, 0);
|
---|
700 | DownSample(fbo, 1, mDownSampleFbo, 1);
|
---|
701 |
|
---|
702 | ComputeSsao(fbo, tempCohFactor, oldProjViewMatrix, projViewMatrix);
|
---|
703 | CombineSsao(fbo);
|
---|
704 | break;
|
---|
705 | case GI:
|
---|
706 | // downsample fbo buffers for colors, normals
|
---|
707 | DownSample(fbo, colorBufferIdx, mDownSampleFbo, 0);
|
---|
708 | DownSample(fbo, 1, mDownSampleFbo, 1);
|
---|
709 |
|
---|
710 | ComputeGlobIllum(fbo, tempCohFactor, projViewMatrix, oldProjViewMatrix);
|
---|
711 | CombineIllum(fbo);
|
---|
712 | break;
|
---|
713 | default: // DEFAULT
|
---|
714 | // do nothing: standard deferred shading
|
---|
715 | break;
|
---|
716 | }
|
---|
717 |
|
---|
718 | if (useToneMapping)
|
---|
719 | {
|
---|
720 | float imageKey, whiteLum, middleGrey;
|
---|
721 |
|
---|
722 | ComputeToneParameters(fbo, light, imageKey, whiteLum, middleGrey);
|
---|
723 | ToneMap(fbo, imageKey, whiteLum, middleGrey);
|
---|
724 | }
|
---|
725 |
|
---|
726 | AntiAliasing(fbo, light);
|
---|
727 |
|
---|
728 | glEnable(GL_LIGHTING);
|
---|
729 | glDisable(GL_TEXTURE_2D);
|
---|
730 |
|
---|
731 | glMatrixMode(GL_PROJECTION);
|
---|
732 | glPopMatrix();
|
---|
733 |
|
---|
734 | glMatrixMode(GL_MODELVIEW);
|
---|
735 | glPopMatrix();
|
---|
736 |
|
---|
737 | glPopAttrib();
|
---|
738 |
|
---|
739 | FrameBufferObject::Release();
|
---|
740 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
741 | }
|
---|
742 |
|
---|
743 |
|
---|
744 | void DeferredRenderer::ComputeSsao(FrameBufferObject *fbo,
|
---|
745 | float tempCohFactor,
|
---|
746 | const Matrix4x4 &oldProjViewMatrix,
|
---|
747 | const Matrix4x4 &projViewMatrix
|
---|
748 | )
|
---|
749 | {
|
---|
750 | #ifdef USE_3D_SSAO
|
---|
751 | // bias from [-1, 1] to [0, 1]
|
---|
752 | static Matrix4x4 biasMatrix(0.5f, 0.0f, 0.0f, 0.5f,
|
---|
753 | 0.0f, 0.5f, 0.0f, 0.5f,
|
---|
754 | 0.0f, 0.0f, 0.5f, 0.5f,
|
---|
755 | 0.0f, 0.0f, 0.0f, 1.0f);
|
---|
756 |
|
---|
757 | Matrix4x4 m = projViewMatrix * biasMatrix;
|
---|
758 | cgGLSetMatrixParameterfc(sModelViewProjMatrixParam, (const float *)m.x);
|
---|
759 | #else
|
---|
760 | cgGLSetMatrixParameterfc(sModelViewProjMatrixParam, (const float *)projViewMatrix.x);
|
---|
761 | #endif
|
---|
762 |
|
---|
763 |
|
---|
764 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixParam, (const float *)oldProjViewMatrix.x);
|
---|
765 | #if 0
|
---|
766 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
767 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
768 | #else
|
---|
769 | GLuint colorsTex = mDownSampleFbo->GetColorBuffer(0)->GetTexture();
|
---|
770 | GLuint normalsTex = mDownSampleFbo->GetColorBuffer(1)->GetTexture();
|
---|
771 | #endif
|
---|
772 |
|
---|
773 | GLuint oldTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
774 |
|
---|
775 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
776 | glViewport(0, 0, mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
|
---|
777 |
|
---|
778 | // read the second buffer, write to the first buffer
|
---|
779 | mIllumFbo->Bind();
|
---|
780 | glDrawBuffers(1, mrt + mIllumFboIndex);
|
---|
781 |
|
---|
782 |
|
---|
783 | cgGLBindProgram(sCgSsaoProgram);
|
---|
784 |
|
---|
785 | cgGLSetTextureParameter(sColorsTexParam, colorsTex);
|
---|
786 | cgGLEnableTextureParameter(sColorsTexParam);
|
---|
787 |
|
---|
788 | cgGLSetTextureParameter(sNormalsTexParam, normalsTex);
|
---|
789 | cgGLEnableTextureParameter(sNormalsTexParam);
|
---|
790 |
|
---|
791 | cgGLSetTextureParameter(sNoiseTexParam, noiseTex);
|
---|
792 | cgGLEnableTextureParameter(sNoiseTexParam);
|
---|
793 |
|
---|
794 | cgGLSetTextureParameter(sOldTexParam, oldTex);
|
---|
795 | cgGLEnableTextureParameter(sOldTexParam);
|
---|
796 |
|
---|
797 | Vector3 pos = mCamera->GetPosition();
|
---|
798 | cgGLSetParameter3f(sEyePosParam, pos.x, pos.y, pos.z);
|
---|
799 |
|
---|
800 | cgGLSetParameter1f(sTemporalCoherenceParam, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
801 |
|
---|
802 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
803 | {
|
---|
804 | mRegenerateSamples = false;
|
---|
805 |
|
---|
806 | // q: should we generate new samples or only rotate the old ones?
|
---|
807 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
808 | // needs longer to converge
|
---|
809 | GenerateSamples(mSamplingMethod);
|
---|
810 |
|
---|
811 | #ifdef USE_3D_SSAO
|
---|
812 | cgGLSetParameterArray3f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples3);
|
---|
813 | #else
|
---|
814 | cgGLSetParameterArray2f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples2);
|
---|
815 | #endif
|
---|
816 | }
|
---|
817 |
|
---|
818 | Vector3 tl, tr, bl, br;
|
---|
819 | ComputeViewVectors(tl, tr, bl, br);
|
---|
820 |
|
---|
821 | cgGLSetParameter3f(sBLParam, bl.x, bl.y, bl.z);
|
---|
822 | cgGLSetParameter3f(sBRParam, br.x, br.y, br.z);
|
---|
823 | cgGLSetParameter3f(sTLParam, tl.x, tl.y, tl.z);
|
---|
824 | cgGLSetParameter3f(sTRParam, tr.x, tr.y, tr.z);
|
---|
825 |
|
---|
826 |
|
---|
827 | glBegin(GL_QUADS);
|
---|
828 |
|
---|
829 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
|
---|
830 | const float offs = 0.5f;
|
---|
831 |
|
---|
832 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-offs, -offs, -0.5f);
|
---|
833 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( offs, -offs, -0.5f);
|
---|
834 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( offs, offs, -0.5f);
|
---|
835 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-offs, offs, -0.5f);
|
---|
836 |
|
---|
837 | //cout<<bl << " " << br << endl;
|
---|
838 |
|
---|
839 | glEnd();
|
---|
840 |
|
---|
841 | cgGLDisableTextureParameter(sColorsTexParam);
|
---|
842 | cgGLDisableTextureParameter(sNormalsTexParam);
|
---|
843 | cgGLDisableTextureParameter(sNoiseTexParam);
|
---|
844 | cgGLDisableTextureParameter(sOldTexParam);
|
---|
845 |
|
---|
846 | glPopAttrib();
|
---|
847 |
|
---|
848 | PrintGLerror("ssao first pass");
|
---|
849 | }
|
---|
850 |
|
---|
851 |
|
---|
852 | void DeferredRenderer::ComputeViewVectors(Vector3 &tl, Vector3 &tr, Vector3 &bl, Vector3 &br)
|
---|
853 | {
|
---|
854 | Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
|
---|
855 |
|
---|
856 | mCamera->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
|
---|
857 |
|
---|
858 | bl = Normalize(nbl - fbl);
|
---|
859 | br = Normalize(nbr - fbr);
|
---|
860 | tl = Normalize(ntl - ftl);
|
---|
861 | tr = Normalize(ntr - ftr);
|
---|
862 | }
|
---|
863 |
|
---|
864 |
|
---|
865 | static void SetVertex(float x, float y, float x_offs, float y_offs)
|
---|
866 | {
|
---|
867 | glMultiTexCoord2fARB(GL_TEXTURE0_ARB, x, y); // center
|
---|
868 | glMultiTexCoord2fARB(GL_TEXTURE1_ARB, x - x_offs, y + y_offs); // left top
|
---|
869 | glMultiTexCoord2fARB(GL_TEXTURE2_ARB, x + x_offs, y - y_offs); // right bottom
|
---|
870 | glMultiTexCoord2fARB(GL_TEXTURE3_ARB, x + x_offs, y + y_offs); // right top
|
---|
871 | glMultiTexCoord2fARB(GL_TEXTURE4_ARB, x - x_offs, y - y_offs); // left bottom
|
---|
872 |
|
---|
873 | glMultiTexCoord4fARB(GL_TEXTURE5_ARB, x - x_offs, y, x + x_offs, y); // left right
|
---|
874 | glMultiTexCoord4fARB(GL_TEXTURE6_ARB, x, y + y_offs, x, y - y_offs); // top bottom
|
---|
875 |
|
---|
876 | glVertex3f(x - 0.5f, y - 0.5f, -0.5f);
|
---|
877 | }
|
---|
878 |
|
---|
879 |
|
---|
880 | void DeferredRenderer::AntiAliasing(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
881 | {
|
---|
882 | FrameBufferObject::Release();
|
---|
883 |
|
---|
884 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
885 |
|
---|
886 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
887 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
888 |
|
---|
889 | cgGLBindProgram(sCgAntiAliasingProgram);
|
---|
890 |
|
---|
891 | cgGLSetTextureParameter(sColorsTexAntiAliasingParam, colorsTex);
|
---|
892 | cgGLEnableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
893 |
|
---|
894 | cgGLSetTextureParameter(sNormalsTexAntiAliasingParam, normalsTex);
|
---|
895 | cgGLEnableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
896 |
|
---|
897 | // glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
898 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
899 |
|
---|
900 | glBegin(GL_QUADS);
|
---|
901 |
|
---|
902 | // the neighbouring texels
|
---|
903 | float x_offs = 1.0f / mWidth;
|
---|
904 | float y_offs = 1.0f / mHeight;
|
---|
905 |
|
---|
906 | SetVertex(0, 0, x_offs, y_offs);
|
---|
907 | SetVertex(1, 0, x_offs, y_offs);
|
---|
908 | SetVertex(1, 1, x_offs, y_offs);
|
---|
909 | SetVertex(0, 1, x_offs, y_offs);
|
---|
910 |
|
---|
911 | glEnd();
|
---|
912 |
|
---|
913 | cgGLDisableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
914 | cgGLDisableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
915 |
|
---|
916 | PrintGLerror("antialiasing");
|
---|
917 | }
|
---|
918 |
|
---|
919 |
|
---|
920 | void DeferredRenderer::FirstPass(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
921 | {
|
---|
922 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
923 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
924 | GLuint positionsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
925 |
|
---|
926 | fbo->Bind();
|
---|
927 |
|
---|
928 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
929 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
930 |
|
---|
931 | cgGLBindProgram(sCgDeferredProgram);
|
---|
932 |
|
---|
933 | cgGLSetTextureParameter(sColorsTexDeferredParam, colorsTex);
|
---|
934 | cgGLEnableTextureParameter(sColorsTexDeferredParam);
|
---|
935 |
|
---|
936 | cgGLSetTextureParameter(sPositionsTexDeferredParam, positionsTex);
|
---|
937 | cgGLEnableTextureParameter(sPositionsTexDeferredParam);
|
---|
938 |
|
---|
939 | cgGLSetTextureParameter(sNormalsTexDeferredParam, normalsTex);
|
---|
940 | cgGLEnableTextureParameter(sNormalsTexDeferredParam);
|
---|
941 |
|
---|
942 | Vector3 lightDir = -light->GetDirection();
|
---|
943 | cgGLSetParameter3f(sLightDirParam, lightDir.x, lightDir.y, lightDir.z);
|
---|
944 |
|
---|
945 | Vector3 tl, tr, bl, br;
|
---|
946 | ComputeViewVectors(tl, tr, bl, br);
|
---|
947 |
|
---|
948 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
|
---|
949 | const float offs = 0.5f;
|
---|
950 |
|
---|
951 | glBegin(GL_QUADS);
|
---|
952 |
|
---|
953 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-offs, -offs, -0.5f);
|
---|
954 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( offs, -offs, -0.5f);
|
---|
955 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( offs, offs, -0.5f);
|
---|
956 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-offs, offs, -0.5f);
|
---|
957 |
|
---|
958 | glEnd();
|
---|
959 |
|
---|
960 | cgGLDisableTextureParameter(sColorsTexDeferredParam);
|
---|
961 | cgGLDisableTextureParameter(sPositionsTexDeferredParam);
|
---|
962 | cgGLDisableTextureParameter(sNormalsTexDeferredParam);
|
---|
963 |
|
---|
964 | PrintGLerror("deferred shading");
|
---|
965 | }
|
---|
966 |
|
---|
967 |
|
---|
968 |
|
---|
969 | void DeferredRenderer::ComputeGlobIllum(FrameBufferObject *fbo,
|
---|
970 | float tempCohFactor,
|
---|
971 | const Matrix4x4 &projViewMatrix,
|
---|
972 | const Matrix4x4 &oldProjViewMatrix)
|
---|
973 | {
|
---|
974 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixGiParam, (const float *)oldProjViewMatrix.x);
|
---|
975 | cgGLSetMatrixParameterfc(sModelViewProjMatrixGiParam, (const float *)projViewMatrix.x);
|
---|
976 |
|
---|
977 | #if 0
|
---|
978 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
979 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
980 | #else
|
---|
981 | GLuint colorsTex = mDownSampleFbo->GetColorBuffer(0)->GetTexture();
|
---|
982 | GLuint normalsTex = mDownSampleFbo->GetColorBuffer(1)->GetTexture();
|
---|
983 | #endif
|
---|
984 |
|
---|
985 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
986 | glViewport(0, 0, mIllumFbo->GetWidth(), mIllumFbo->GetHeight());
|
---|
987 |
|
---|
988 | // read the second buffer, write to the first buffer
|
---|
989 | mIllumFbo->Bind();
|
---|
990 |
|
---|
991 | glDrawBuffers(2, mrt + mIllumFboIndex);
|
---|
992 |
|
---|
993 | GLuint oldSsaoTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex)->GetTexture();
|
---|
994 | GLuint oldIllumTex = mIllumFbo->GetColorBuffer(2 - mIllumFboIndex + 1)->GetTexture();
|
---|
995 |
|
---|
996 | cgGLBindProgram(sCgGiProgram);
|
---|
997 |
|
---|
998 |
|
---|
999 | cgGLSetTextureParameter(sColorsTexGiParam, colorsTex);
|
---|
1000 | cgGLEnableTextureParameter(sColorsTexGiParam);
|
---|
1001 |
|
---|
1002 | cgGLSetTextureParameter(sNormalsTexGiParam, normalsTex);
|
---|
1003 | cgGLEnableTextureParameter(sNormalsTexGiParam);
|
---|
1004 |
|
---|
1005 | cgGLSetTextureParameter(sNoiseTexGiParam, noiseTex);
|
---|
1006 | cgGLEnableTextureParameter(sNoiseTexGiParam);
|
---|
1007 |
|
---|
1008 | cgGLSetTextureParameter(sOldSsaoTexGiParam, oldSsaoTex);
|
---|
1009 | cgGLEnableTextureParameter(sOldSsaoTexGiParam);
|
---|
1010 |
|
---|
1011 | cgGLSetTextureParameter(sOldIllumTexGiParam, oldIllumTex);
|
---|
1012 | cgGLEnableTextureParameter(sOldIllumTexGiParam);
|
---|
1013 |
|
---|
1014 |
|
---|
1015 | cgGLSetParameter1f(sTemporalCoherenceGiParam, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
1016 |
|
---|
1017 |
|
---|
1018 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
1019 | {
|
---|
1020 | mRegenerateSamples = false;
|
---|
1021 |
|
---|
1022 | // q: should we generate new samples or only rotate the old ones?
|
---|
1023 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
1024 | // needs longer to converge
|
---|
1025 | GenerateSamples(mSamplingMethod);
|
---|
1026 |
|
---|
1027 | cgGLSetParameterArray2f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples2);
|
---|
1028 | }
|
---|
1029 |
|
---|
1030 |
|
---|
1031 | Vector3 tl, tr, bl, br;
|
---|
1032 | ComputeViewVectors(tl, tr, bl, br);
|
---|
1033 |
|
---|
1034 | const Vector3 pos = mCamera->GetPosition();
|
---|
1035 | cgGLSetParameter3f(sEyePosGiParam, pos.x, pos.y, pos.z);
|
---|
1036 |
|
---|
1037 | cgGLSetParameter3f(sBLGiParam, bl.x, bl.y, bl.z);
|
---|
1038 | cgGLSetParameter3f(sBRGiParam, br.x, br.y, br.z);
|
---|
1039 | cgGLSetParameter3f(sTLGiParam, tl.x, tl.y, tl.z);
|
---|
1040 | cgGLSetParameter3f(sTRGiParam, tr.x, tr.y, tr.z);
|
---|
1041 |
|
---|
1042 |
|
---|
1043 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
|
---|
1044 | const float offs = 0.5f;
|
---|
1045 |
|
---|
1046 | glBegin(GL_QUADS);
|
---|
1047 |
|
---|
1048 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-offs, -offs, -0.5f);
|
---|
1049 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( offs, -offs, -0.5f);
|
---|
1050 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( offs, offs, -0.5f);
|
---|
1051 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-offs, offs, -0.5f);
|
---|
1052 |
|
---|
1053 | glEnd();
|
---|
1054 |
|
---|
1055 | cgGLDisableTextureParameter(sColorsTexGiParam);
|
---|
1056 | cgGLDisableTextureParameter(sNormalsTexGiParam);
|
---|
1057 | cgGLDisableTextureParameter(sNoiseTexGiParam);
|
---|
1058 | cgGLDisableTextureParameter(sOldSsaoTexGiParam);
|
---|
1059 | cgGLDisableTextureParameter(sOldIllumTexGiParam);
|
---|
1060 |
|
---|
1061 | glPopAttrib();
|
---|
1062 |
|
---|
1063 | PrintGLerror("globillum first pass");
|
---|
1064 | }
|
---|
1065 |
|
---|
1066 |
|
---|
1067 | void DeferredRenderer::CombineIllum(FrameBufferObject *fbo)
|
---|
1068 | {
|
---|
1069 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
1070 |
|
---|
1071 | GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
1072 | GLuint illumTex = mIllumFbo->GetColorBuffer(mIllumFboIndex + 1)->GetTexture();
|
---|
1073 |
|
---|
1074 |
|
---|
1075 | fbo->Bind();
|
---|
1076 |
|
---|
1077 | // overwrite old color texture
|
---|
1078 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1079 |
|
---|
1080 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1081 |
|
---|
1082 | cgGLBindProgram(sCgCombinedIllumProgram);
|
---|
1083 |
|
---|
1084 |
|
---|
1085 | cgGLSetTextureParameter(sColorsTexCombinedIllumParam, colorsTex);
|
---|
1086 | cgGLEnableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
1087 |
|
---|
1088 | cgGLSetTextureParameter(sSsaoTexCombinedIllumParam, ssaoTex);
|
---|
1089 | cgGLEnableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
1090 |
|
---|
1091 | cgGLSetTextureParameter(sIllumTexCombinedIllumParam, illumTex);
|
---|
1092 | cgGLEnableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
1093 |
|
---|
1094 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1095 |
|
---|
1096 | const float offs = 0.5f;
|
---|
1097 |
|
---|
1098 | glBegin(GL_QUADS);
|
---|
1099 |
|
---|
1100 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1101 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1102 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1103 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1104 |
|
---|
1105 | glEnd();
|
---|
1106 |
|
---|
1107 | cgGLDisableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
1108 | cgGLDisableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
1109 | cgGLDisableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
1110 |
|
---|
1111 | PrintGLerror("combine");
|
---|
1112 | }
|
---|
1113 |
|
---|
1114 |
|
---|
1115 | static float GaussianDistribution(float x, float y, float rho)
|
---|
1116 | {
|
---|
1117 | float g = 1.0f / sqrtf(2.0f * M_PI * rho * rho);
|
---|
1118 | g *= expf( -(x*x + y*y) / (2.0f * rho * rho));
|
---|
1119 |
|
---|
1120 | return g;
|
---|
1121 | }
|
---|
1122 |
|
---|
1123 |
|
---|
1124 | void DeferredRenderer::CombineSsao(FrameBufferObject *fbo)
|
---|
1125 | {
|
---|
1126 | fbo->Bind();
|
---|
1127 |
|
---|
1128 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
1129 | GLuint positionsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
1130 |
|
---|
1131 | GLuint ssaoTex = mIllumFbo->GetColorBuffer(mIllumFboIndex)->GetTexture();
|
---|
1132 |
|
---|
1133 | // overwrite old color texture
|
---|
1134 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1135 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1136 |
|
---|
1137 | cgGLBindProgram(sCgCombinedSsaoProgram);
|
---|
1138 |
|
---|
1139 | float filterOffsets[NUM_DOWNSAMPLES * 2];
|
---|
1140 | float filterWeights[NUM_DOWNSAMPLES];
|
---|
1141 |
|
---|
1142 | PoissonDiscSampleGenerator2 poisson(NUM_DOWNSAMPLES, 1.0f);
|
---|
1143 | poisson.Generate((float *)filterOffsets);
|
---|
1144 |
|
---|
1145 | const float xoffs = 2.0f / fbo->GetWidth();
|
---|
1146 | const float yoffs = 2.0f / fbo->GetHeight();
|
---|
1147 |
|
---|
1148 | for (int i = 0; i < NUM_DOWNSAMPLES; ++ i)
|
---|
1149 | {
|
---|
1150 | float x = filterOffsets[2 * i + 0];
|
---|
1151 | float y = filterOffsets[2 * i + 1];
|
---|
1152 |
|
---|
1153 | filterOffsets[2 * i + 0] *= xoffs;
|
---|
1154 | filterOffsets[2 * i + 1] *= yoffs;
|
---|
1155 |
|
---|
1156 | filterWeights[i] = GaussianDistribution(x, y, 1.0f);
|
---|
1157 | }
|
---|
1158 |
|
---|
1159 | //ComputeSampleOffsets(filterOffsets, fbo->GetWidth(), fbo->GetHeight());
|
---|
1160 | cgGLSetParameterArray2f(sFilterOffsetsParam, 0, NUM_DOWNSAMPLES, (const float *)filterOffsets);
|
---|
1161 | cgGLSetParameterArray1f(sFilterWeightsParam, 0, NUM_DOWNSAMPLES, (const float *)filterWeights);
|
---|
1162 |
|
---|
1163 | cgGLSetTextureParameter(sColorsTexCombinedSsaoParam, colorsTex);
|
---|
1164 | cgGLEnableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
1165 |
|
---|
1166 | cgGLSetTextureParameter(sSsaoTexCombinedSsaoParam, ssaoTex);
|
---|
1167 | cgGLEnableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
1168 |
|
---|
1169 |
|
---|
1170 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1171 |
|
---|
1172 | const float offs = 0.5f;
|
---|
1173 |
|
---|
1174 | glBegin(GL_QUADS);
|
---|
1175 |
|
---|
1176 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1177 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1178 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1179 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1180 |
|
---|
1181 | glEnd();
|
---|
1182 |
|
---|
1183 | cgGLDisableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
1184 | cgGLDisableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
1185 |
|
---|
1186 | PrintGLerror("combine ssao");
|
---|
1187 | }
|
---|
1188 |
|
---|
1189 |
|
---|
1190 | void DeferredRenderer::FirstPassShadow(FrameBufferObject *fbo,
|
---|
1191 | DirectionalLight *light,
|
---|
1192 | ShadowMap *shadowMap)
|
---|
1193 | {
|
---|
1194 | fbo->Bind();
|
---|
1195 |
|
---|
1196 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
1197 | GLuint normalsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
1198 | GLuint positionsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
1199 |
|
---|
1200 | GLuint shadowTex = shadowMap->GetDepthTexture();
|
---|
1201 |
|
---|
1202 | Matrix4x4 shadowMatrix;
|
---|
1203 | shadowMap->GetTextureMatrix(shadowMatrix);
|
---|
1204 |
|
---|
1205 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1206 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1207 |
|
---|
1208 |
|
---|
1209 | cgGLBindProgram(sCgDeferredShadowProgram);
|
---|
1210 |
|
---|
1211 | cgGLSetTextureParameter(sColorsTexShadowParam, colorsTex);
|
---|
1212 | cgGLEnableTextureParameter(sColorsTexShadowParam);
|
---|
1213 |
|
---|
1214 | cgGLSetTextureParameter(sPositionsTexShadowParam, positionsTex);
|
---|
1215 | cgGLEnableTextureParameter(sPositionsTexShadowParam);
|
---|
1216 |
|
---|
1217 | cgGLSetTextureParameter(sNormalsTexShadowParam, normalsTex);
|
---|
1218 | cgGLEnableTextureParameter(sNormalsTexShadowParam);
|
---|
1219 |
|
---|
1220 | cgGLSetTextureParameter(sShadowMapParam, shadowTex);
|
---|
1221 | cgGLEnableTextureParameter(sShadowMapParam);
|
---|
1222 |
|
---|
1223 | cgGLSetParameter1f(sSampleWidthParam, 2.0f / shadowMap->GetSize());
|
---|
1224 |
|
---|
1225 |
|
---|
1226 | cgGLSetMatrixParameterfc(sShadowMatrixParam, (const float *)shadowMatrix.x);
|
---|
1227 |
|
---|
1228 | cgGLSetTextureParameter(sNoiseTexShadowParam, noiseTex);
|
---|
1229 | cgGLEnableTextureParameter(sNoiseTexShadowParam);
|
---|
1230 |
|
---|
1231 | Vector3 lightDir = -light->GetDirection();
|
---|
1232 | cgGLSetParameter3f(sLightDirShadowParam, lightDir.x, lightDir.y, lightDir.z);
|
---|
1233 |
|
---|
1234 | Vector3 tl, tr, bl, br;
|
---|
1235 | ComputeViewVectors(tl, tr, bl, br);
|
---|
1236 |
|
---|
1237 | const Vector3 pos = mCamera->GetPosition();
|
---|
1238 | cgGLSetParameter3f(sEyePosShadowParam, pos.x, pos.y, pos.z);
|
---|
1239 |
|
---|
1240 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
|
---|
1241 | const float offs = 0.5f;
|
---|
1242 |
|
---|
1243 | glBegin(GL_QUADS);
|
---|
1244 |
|
---|
1245 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-offs, -offs, -0.5f);
|
---|
1246 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( offs, -offs, -0.5f);
|
---|
1247 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( offs, offs, -0.5f);
|
---|
1248 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-offs, offs, -0.5f);
|
---|
1249 |
|
---|
1250 | glEnd();
|
---|
1251 |
|
---|
1252 | cgGLDisableTextureParameter(sColorsTexShadowParam);
|
---|
1253 | cgGLDisableTextureParameter(sPositionsTexShadowParam);
|
---|
1254 | cgGLDisableTextureParameter(sNormalsTexShadowParam);
|
---|
1255 | cgGLDisableTextureParameter(sShadowMapParam);
|
---|
1256 | cgGLDisableTextureParameter(sNoiseTexShadowParam);
|
---|
1257 |
|
---|
1258 | PrintGLerror("deferred shading + shadows");
|
---|
1259 | }
|
---|
1260 |
|
---|
1261 |
|
---|
1262 | void DeferredRenderer::SetSamplingMethod(SAMPLING_METHOD s)
|
---|
1263 | {
|
---|
1264 | if (s != mSamplingMethod)
|
---|
1265 | {
|
---|
1266 | mSamplingMethod = s;
|
---|
1267 | mRegenerateSamples = true;
|
---|
1268 | }
|
---|
1269 | }
|
---|
1270 |
|
---|
1271 |
|
---|
1272 | void DeferredRenderer::SetShadingMethod(SHADING_METHOD s)
|
---|
1273 | {
|
---|
1274 | if (s != mShadingMethod)
|
---|
1275 | {
|
---|
1276 | mShadingMethod = s;
|
---|
1277 | mRegenerateSamples = true;
|
---|
1278 | }
|
---|
1279 | }
|
---|
1280 |
|
---|
1281 |
|
---|
1282 | void DeferredRenderer::ComputeToneParameters(FrameBufferObject *fbo,
|
---|
1283 | DirectionalLight *light,
|
---|
1284 | float &imageKey,
|
---|
1285 | float &whiteLum,
|
---|
1286 | float &middleGrey)
|
---|
1287 | {
|
---|
1288 | // hack: estimate value where sky burns out
|
---|
1289 | whiteLum = log(WHITE_LUMINANCE);
|
---|
1290 |
|
---|
1291 | ////////////////////
|
---|
1292 | //-- linear interpolate brightness key depending on the current sun position
|
---|
1293 |
|
---|
1294 | const float minKey = 0.09f;
|
---|
1295 | const float maxKey = 0.36f;
|
---|
1296 |
|
---|
1297 | const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
|
---|
1298 | middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
|
---|
1299 |
|
---|
1300 |
|
---|
1301 | //////////
|
---|
1302 | //-- compute avg loglum
|
---|
1303 |
|
---|
1304 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
1305 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
1306 |
|
---|
1307 | fbo->Bind();
|
---|
1308 |
|
---|
1309 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1310 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1311 |
|
---|
1312 | cgGLBindProgram(sCgLogLumProgram);
|
---|
1313 |
|
---|
1314 | cgGLSetTextureParameter(sColorsTexLogLumParam, colorsTex);
|
---|
1315 | cgGLEnableTextureParameter(sColorsTexLogLumParam);
|
---|
1316 |
|
---|
1317 | const float offs = 0.5f;
|
---|
1318 |
|
---|
1319 | glBegin(GL_QUADS);
|
---|
1320 |
|
---|
1321 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1322 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1323 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1324 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1325 |
|
---|
1326 | glEnd();
|
---|
1327 |
|
---|
1328 | cgGLDisableTextureParameter(sColorsTexLogLumParam);
|
---|
1329 |
|
---|
1330 | PrintGLerror("ToneMapParams");
|
---|
1331 |
|
---|
1332 |
|
---|
1333 | ///////////////////
|
---|
1334 | //-- compute avg loglum in scene using mipmapping
|
---|
1335 |
|
---|
1336 | glBindTexture(GL_TEXTURE_2D, fbo->GetColorBuffer(colorBufferIdx)->GetTexture());
|
---|
1337 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
1338 | }
|
---|
1339 |
|
---|
1340 |
|
---|
1341 | static void ExportData(float *data, int w, int h)
|
---|
1342 | {
|
---|
1343 | startil();
|
---|
1344 |
|
---|
1345 | cout << "w: " << w << " h: " << h << endl;
|
---|
1346 | ILstring filename = ILstring("downsample2.jpg");
|
---|
1347 | ilRegisterType(IL_FLOAT);
|
---|
1348 |
|
---|
1349 | const int depth = 1;
|
---|
1350 | const int bpp = 4;
|
---|
1351 |
|
---|
1352 | if (!ilTexImage(w, h, depth, bpp, IL_RGBA, IL_FLOAT, data))
|
---|
1353 | {
|
---|
1354 | cerr << "IL error " << ilGetError() << endl;
|
---|
1355 | stopil();
|
---|
1356 | return;
|
---|
1357 | }
|
---|
1358 |
|
---|
1359 | if (!ilSaveImage(filename))
|
---|
1360 | {
|
---|
1361 | cerr << "TGA write error " << ilGetError() << endl;
|
---|
1362 | }
|
---|
1363 |
|
---|
1364 | stopil();
|
---|
1365 |
|
---|
1366 | // cout << "exported buffer" << endl;
|
---|
1367 | }
|
---|
1368 |
|
---|
1369 |
|
---|
1370 | void DeferredRenderer::DownSample(FrameBufferObject *fbo, int bufferIdx,
|
---|
1371 | FrameBufferObject *downSampleFbo,
|
---|
1372 | int downSampleBufferIdx)
|
---|
1373 | {
|
---|
1374 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(bufferIdx);
|
---|
1375 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
1376 |
|
---|
1377 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
1378 | glViewport(0, 0, downSampleFbo->GetWidth(), downSampleFbo->GetHeight());
|
---|
1379 |
|
---|
1380 | cgGLBindProgram(sCgDownSampleProgram);
|
---|
1381 |
|
---|
1382 | cgGLSetTextureParameter(sColorsTexDownSampleParam, colorsTex);
|
---|
1383 | cgGLEnableTextureParameter(sColorsTexDownSampleParam);
|
---|
1384 |
|
---|
1385 | float downSampleOffsets[NUM_DOWNSAMPLES * 2];
|
---|
1386 | ComputeSampleOffsets(downSampleOffsets, fbo->GetWidth(), fbo->GetHeight());
|
---|
1387 |
|
---|
1388 | cgGLSetParameterArray2f(sDownSampleOffsetParam, 0, NUM_DOWNSAMPLES, (const float *)downSampleOffsets);
|
---|
1389 |
|
---|
1390 | mDownSampleFbo->Bind();
|
---|
1391 | glDrawBuffers(1, mrt + downSampleBufferIdx);
|
---|
1392 |
|
---|
1393 | cgGLBindProgram(sCgDownSampleProgram);
|
---|
1394 |
|
---|
1395 | const float offs = 0.5f;
|
---|
1396 |
|
---|
1397 | glBegin(GL_QUADS);
|
---|
1398 |
|
---|
1399 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1400 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1401 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1402 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1403 |
|
---|
1404 | glEnd();
|
---|
1405 |
|
---|
1406 | cgGLDisableTextureParameter(sColorsTexDownSampleParam);
|
---|
1407 |
|
---|
1408 | /*float *data = (float *)mDownSampleFbo->GetColorBuffer(0)->ReadTexture();
|
---|
1409 | ExportData(data, mWidth / 2, mHeight / 2);
|
---|
1410 | delete [] data;*/
|
---|
1411 |
|
---|
1412 | glPopAttrib();
|
---|
1413 |
|
---|
1414 | PrintGLerror("downsample");
|
---|
1415 | }
|
---|
1416 |
|
---|
1417 |
|
---|
1418 | void DeferredRenderer::ToneMap(FrameBufferObject *fbo,
|
---|
1419 | float imageKey,
|
---|
1420 | float whiteLum,
|
---|
1421 | float middleGrey)
|
---|
1422 | {
|
---|
1423 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
1424 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
1425 |
|
---|
1426 | fbo->Bind();
|
---|
1427 | #if 1
|
---|
1428 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1429 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1430 |
|
---|
1431 | cgGLBindProgram(sCgToneProgram);
|
---|
1432 |
|
---|
1433 | cgGLSetTextureParameter(sColorsTexToneParam, colorsTex);
|
---|
1434 | cgGLEnableTextureParameter(sColorsTexToneParam);
|
---|
1435 |
|
---|
1436 | cgGLSetParameter1f(sImageKeyParam, imageKey);
|
---|
1437 | cgGLSetParameter1f(sWhiteLumParam, whiteLum);
|
---|
1438 | cgGLSetParameter1f(sMiddleGreyParam, middleGrey);
|
---|
1439 |
|
---|
1440 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1441 |
|
---|
1442 |
|
---|
1443 | glBegin(GL_QUADS);
|
---|
1444 |
|
---|
1445 | const float offs = 0.5f;
|
---|
1446 |
|
---|
1447 |
|
---|
1448 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1449 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1450 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1451 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1452 |
|
---|
1453 | glEnd();
|
---|
1454 | #endif
|
---|
1455 |
|
---|
1456 | cgGLDisableTextureParameter(sColorsTexToneParam);
|
---|
1457 |
|
---|
1458 | PrintGLerror("ToneMap");
|
---|
1459 | }
|
---|
1460 |
|
---|
1461 |
|
---|
1462 |
|
---|
1463 |
|
---|
1464 | } // namespace
|
---|