1 | #ifndef _SHADERPROGRAM_H__
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2 | #define _SHADERPROGRAM_H__
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3 |
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4 | #include "common.h"
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5 | #include "glInterface.h"
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6 |
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7 | #include <Cg/cg.h>
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8 | #include <Cg/cgGL.h>
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9 | #include <string>
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10 | #include <map>
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11 |
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12 |
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13 | namespace CHCDemoEngine
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14 | {
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15 |
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16 | class FrameBufferObject;
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17 | class Vector3;
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18 | class Camera;
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19 | class Matrix4x4;
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20 | class ShadowMap;
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21 | class DirectionalLight;
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22 | class ShaderProgram;
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23 |
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24 |
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25 | typedef std::map<std::string, int> CGParameterMap;
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26 | typedef std::vector<CGparameter> CGParameterArray;
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27 |
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28 | struct ParameterPair1f
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29 | {
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30 | unsigned int mParameterIdx;
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31 | float mValue;
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32 | };
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33 |
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34 | class GPUProgramParameters
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35 | {
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36 | public:
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37 |
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38 | /** Constructor which initialized this parameter set for a given program.
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39 | */
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40 | GPUProgramParameters(ShaderProgram *p);
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41 |
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42 | void SetProgram(ShaderProgram *p) { mProgram = p; }
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43 | /** Resets this parameter set.
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44 | */
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45 | void Reset();
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46 |
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47 |
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48 | ///////////
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49 | //-- set parameters by index
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50 |
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51 | void SetValue1f(int idx, float value);
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52 | void SetValue2f(int idx, float val1, float val2);
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53 | void SetValue3f(int idx, float val1, float val, float val3);
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54 |
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55 | void SetArray1f(int idx, float *vals, int numElements);
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56 | void SetArray2f(int idx, float *vals, int numElements);
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57 | void SetArray3f(int idx, float *vals, int numElements);
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58 |
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59 | /** Sets the texture parameter.
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60 | */
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61 | void SetTexture(int idx, unsigned int tex);
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62 | /** Sets the matrix parameter.
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63 | */
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64 | void SetMatrix(int idx, Matrix4x4 *mat);
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65 |
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66 |
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67 | ///////////
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68 | //-- set parameters by name (slower!)
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69 |
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70 |
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71 | void SetValue1f(const std::string &name, float value);
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72 | void SetValue2f(const std::string &name, float val1, float val2);
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73 | void SetValue3f(const std::string &name, float val1, float val, float val3);
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74 |
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75 | void SetArray1f(const std::string &name, float *vals, int numElements);
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76 | void SetArray2f(const std::string &name, float *vals, int numElements);
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77 | void SetArray3f(const std::string &name, float *vals, int numElements);
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78 | /** Sets the texture parameter.
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79 | */
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80 | void SetTexture(const std::string &name, unsigned int tex);
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81 | /** Sets the matrix parameter.
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82 | */
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83 | void SetMatrix(const std::string &name, Matrix4x4 *mat);
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84 | /** Feeds the shader program with the parameter values.
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85 | */
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86 | void UpdateParameters();
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87 |
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88 |
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89 | protected:
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90 |
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91 | struct FloatParam
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92 | {
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93 | FloatParam(): mValid(false), mNumComponents(0) {}
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94 |
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95 | FloatParam(float *val, int comp):
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96 | mNumComponents(comp), mValid(true)
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97 | {
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98 | for (int i = 0; i < mNumComponents; ++ i)
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99 | {
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100 | mValues[i] = val[i];
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101 | }
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102 | }
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103 |
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104 | bool mValid;
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105 | float mValues[4];
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106 | int mNumComponents;
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107 | };
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108 |
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109 | struct IntParam
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110 | {
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111 | IntParam(): mValid(false) {}
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112 | IntParam(float val): mValue(val), mValid(true) {}
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113 |
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114 | bool mValid;
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115 | float mValue;
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116 | };
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117 |
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118 | struct MatrixParam
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119 | {
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120 | MatrixParam(): mValue(NULL), mValid(false) {}
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121 |
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122 | MatrixParam(Matrix4x4 *mat): mValue(mat), mValid(true)
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123 | {}
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124 |
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125 | bool mValid;
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126 | Matrix4x4 *mValue;
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127 | };
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128 |
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129 | struct ArrayParam
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130 | {
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131 | ArrayParam(): mValues(NULL), mNumEntries(0), mNumComponents(0), mValid(false) {}
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132 | ArrayParam(float *val, int comp, int numEntries):
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133 | mValues(val), mNumComponents(comp), mNumEntries(numEntries), mValid(true)
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134 | {}
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135 |
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136 | bool mValid;
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137 | float *mValues;
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138 |
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139 | int mNumEntries;
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140 | int mNumComponents;
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141 | };
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142 |
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143 |
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144 | ShaderProgram *mProgram;
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145 |
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146 | std::vector<FloatParam> mFloats;
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147 | std::vector<IntParam> mTextures;
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148 | std::vector<MatrixParam> mMatrices;
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149 | std::vector<ArrayParam> mArrays;
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150 | };
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151 |
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152 |
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153 |
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154 | class ShaderProgram
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155 | {
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156 | friend class GPUProgramParameters;
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157 |
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158 | public:
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159 |
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160 | ShaderProgram(CGprogram program): mProgram(program) {}
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161 |
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162 | ShaderProgram(CGcontext context,
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163 | const std::string &filename,
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164 | CGprofile profile,
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165 | const std::string &functionName);
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166 |
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167 | ~ShaderProgram() { if (mProgram != NULL) cgDestroyProgram(mProgram); }
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168 |
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169 | void SetValue1f(int idx, float value);
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170 | void SetValue2f(int idx, float val1, float val2);
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171 | void SetValue3f(int idx, float val1, float val, float val3);
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172 |
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173 | void SetArray1f(int idx, float *vals, int numElements);
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174 | void SetArray2f(int idx, float *vals, int numElements);
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175 | void SetArray3f(int idx, float *vals, int numElements);
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176 | void SetMatrix(int idx, const Matrix4x4 &mat);
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177 |
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178 | void SetTexture(int idx, unsigned int tex);
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179 |
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180 | void SetValue1f(const std::string &name, float value);
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181 | void SetValue2f(const std::string &name, float val1, float val2);
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182 | void SetValue3f(const std::string &name, float val1, float val, float val3);
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183 |
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184 | void SetArray1f(const std::string &name, float *vals, int numElements);
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185 | void SetArray2f(const std::string &name, float *vals, int numElements);
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186 | void SetArray3f(const std::string &name, float *vals, int numElements);
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187 | /** Sets the matrix parameter.
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188 | */
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189 | void SetMatrix(const std::string &name, const Matrix4x4 &mat);
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190 | /** Sets the texture parameter.
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191 | */
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192 | void SetTexture(const std::string &name, unsigned int tex);
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193 |
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194 | CGparameter AddParameter(const std::string &name, int idx);
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195 | /** Binds the program.
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196 | */
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197 | void Bind();
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198 | /** Returns true if this program is valid.
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199 | */
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200 | inline bool IsValid() const { return mProgram != NULL; }
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201 | /** Enable / disable a texture parameter.
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202 | */
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203 | //void EnableTexture(const std::string &name);
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204 | //void DisableTexture(const std::string &name);
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205 |
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206 |
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207 |
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208 | protected:
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209 |
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210 | inline int GetParamIdxByName(const std::string &name) const;
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211 |
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212 | inline CGparameter GetParameter(int idx) const;
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213 |
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214 | CGparameter GetOrCreateParameter(const std::string &name);
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215 |
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216 |
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217 | ///////////////
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218 |
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219 | CGParameterMap mParamHash;
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220 |
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221 | CGprogram mProgram;
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222 |
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223 | CGParameterArray mTextureParams;
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224 | CGParameterArray mParameters;
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225 | };
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226 |
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227 |
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228 | typedef std::vector<ShaderProgram *> ShaderContainer;
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229 |
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230 | } // namespace
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231 |
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232 | #endif // _ShaderProgram_H__ |
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