[3021] | 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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[3025] | 9 | #include <string>
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| 10 | #include <map>
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[3021] | 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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[3033] | 22 | class ShaderProgram;
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[3021] | 23 |
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[3033] | 24 |
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| 25 | typedef std::map<std::string, int> CGParameterMap;
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[3025] | 26 | typedef std::vector<CGparameter> CGParameterArray;
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[3021] | 27 |
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[3025] | 28 |
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[3038] | 29 | /** This class represents the parameter values for a given GPU program.
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| 30 | */
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[3029] | 31 | class GPUProgramParameters
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| 32 | {
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[3034] | 33 | public:
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| 34 |
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[3036] | 35 | /** Constructor which initialized this parameter set for a given program.
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| 36 | */
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| 37 | GPUProgramParameters(ShaderProgram *p);
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| 38 |
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| 39 | void SetProgram(ShaderProgram *p) { mProgram = p; }
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| 40 | /** Resets this parameter set.
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| 41 | */
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| 42 | void Reset();
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| 43 |
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| 44 |
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[3034] | 45 | ///////////
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| 46 | //-- set parameters by index
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| 47 |
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[3033] | 48 | void SetValue1f(int idx, float value);
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| 49 | void SetValue2f(int idx, float val1, float val2);
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| 50 | void SetValue3f(int idx, float val1, float val, float val3);
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| 51 |
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| 52 | void SetArray1f(int idx, float *vals, int numElements);
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| 53 | void SetArray2f(int idx, float *vals, int numElements);
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| 54 | void SetArray3f(int idx, float *vals, int numElements);
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| 55 |
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| 56 | /** Sets the texture parameter.
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| 57 | */
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| 58 | void SetTexture(int idx, unsigned int tex);
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| 59 | /** Sets the matrix parameter.
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| 60 | */
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| 61 | void SetMatrix(int idx, Matrix4x4 *mat);
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| 62 |
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[3034] | 63 |
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| 64 | ///////////
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| 65 | //-- set parameters by name (slower!)
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| 66 |
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| 67 |
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[3033] | 68 | void SetValue1f(const std::string &name, float value);
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| 69 | void SetValue2f(const std::string &name, float val1, float val2);
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| 70 | void SetValue3f(const std::string &name, float val1, float val, float val3);
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| 71 |
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| 72 | void SetArray1f(const std::string &name, float *vals, int numElements);
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| 73 | void SetArray2f(const std::string &name, float *vals, int numElements);
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| 74 | void SetArray3f(const std::string &name, float *vals, int numElements);
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| 75 | /** Sets the texture parameter.
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| 76 | */
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| 77 | void SetTexture(const std::string &name, unsigned int tex);
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| 78 | /** Sets the matrix parameter.
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| 79 | */
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| 80 | void SetMatrix(const std::string &name, Matrix4x4 *mat);
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[3034] | 81 | /** Feeds the shader program with the parameter values.
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| 82 | */
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| 83 | void UpdateParameters();
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[3033] | 84 |
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[3038] | 85 |
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| 86 |
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[3034] | 87 | protected:
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| 88 |
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| 89 | struct FloatParam
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[3029] | 90 | {
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[3036] | 91 | FloatParam(): mValid(false), mNumComponents(0) {}
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| 92 |
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| 93 | FloatParam(float *val, int comp):
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| 94 | mNumComponents(comp), mValid(true)
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| 95 | {
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| 96 | for (int i = 0; i < mNumComponents; ++ i)
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| 97 | {
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| 98 | mValues[i] = val[i];
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | bool mValid;
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[3032] | 103 | float mValues[4];
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[3034] | 104 | int mNumComponents;
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[3029] | 105 | };
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| 106 |
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[3034] | 107 | struct IntParam
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[3033] | 108 | {
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[3036] | 109 | IntParam(): mValid(false) {}
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| 110 | IntParam(float val): mValue(val), mValid(true) {}
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[3034] | 111 |
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[3036] | 112 | bool mValid;
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[3033] | 113 | float mValue;
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| 114 | };
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| 115 |
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[3034] | 116 | struct MatrixParam
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[3033] | 117 | {
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[3036] | 118 | MatrixParam(): mValue(NULL), mValid(false) {}
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| 119 |
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| 120 | MatrixParam(Matrix4x4 *mat): mValue(mat), mValid(true)
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| 121 | {}
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| 122 |
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| 123 | bool mValid;
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[3033] | 124 | Matrix4x4 *mValue;
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| 125 | };
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| 126 |
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[3034] | 127 | struct ArrayParam
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[3029] | 128 | {
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[3036] | 129 | ArrayParam(): mValues(NULL), mNumEntries(0), mNumComponents(0), mValid(false) {}
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| 130 | ArrayParam(float *val, int comp, int numEntries):
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| 131 | mValues(val), mNumComponents(comp), mNumEntries(numEntries), mValid(true)
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| 132 | {}
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[3032] | 133 |
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[3036] | 134 | bool mValid;
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[3033] | 135 | float *mValues;
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[3036] | 136 |
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[3033] | 137 | int mNumEntries;
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[3034] | 138 | int mNumComponents;
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[3029] | 139 | };
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| 140 |
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[3032] | 141 |
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[3033] | 142 | ShaderProgram *mProgram;
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| 143 |
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[3034] | 144 | std::vector<FloatParam> mFloats;
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| 145 | std::vector<IntParam> mTextures;
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| 146 | std::vector<MatrixParam> mMatrices;
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| 147 | std::vector<ArrayParam> mArrays;
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[3029] | 148 | };
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| 149 |
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| 150 |
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[3038] | 151 | /** This class represents a wrapper for a GPU shader program (vertex or fragment).
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| 152 | */
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[3021] | 153 | class ShaderProgram
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| 154 | {
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[3033] | 155 | friend class GPUProgramParameters;
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| 156 |
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[3021] | 157 | public:
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| 158 |
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| 159 | ShaderProgram(CGprogram program): mProgram(program) {}
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| 160 |
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[3025] | 161 | ShaderProgram(CGcontext context,
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| 162 | const std::string &filename,
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| 163 | CGprofile profile,
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| 164 | const std::string &functionName);
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[3021] | 165 |
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[3025] | 166 | ~ShaderProgram() { if (mProgram != NULL) cgDestroyProgram(mProgram); }
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| 167 |
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[3038] | 168 | /** Assigns a parameter to the specified index.
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| 169 | */
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| 170 | CGparameter AddParameter(const std::string &name, int idx);
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| 171 |
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| 172 |
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| 173 | //////////////
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| 174 | //-- set shader parameters per index
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| 175 |
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[3033] | 176 | void SetValue1f(int idx, float value);
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| 177 | void SetValue2f(int idx, float val1, float val2);
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| 178 | void SetValue3f(int idx, float val1, float val, float val3);
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[3025] | 179 |
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[3033] | 180 | void SetArray1f(int idx, float *vals, int numElements);
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| 181 | void SetArray2f(int idx, float *vals, int numElements);
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| 182 | void SetArray3f(int idx, float *vals, int numElements);
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| 183 | void SetMatrix(int idx, const Matrix4x4 &mat);
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| 184 |
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| 185 | void SetTexture(int idx, unsigned int tex);
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| 186 |
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[3038] | 187 |
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| 188 | ////////////
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| 189 | //-- set shader parameters per parameter name (slow!)
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| 190 |
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| 191 | /// Float parameters
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[3034] | 192 | void SetValue1f(const std::string &name, float value);
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| 193 | void SetValue2f(const std::string &name, float val1, float val2);
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| 194 | void SetValue3f(const std::string &name, float val1, float val, float val3);
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[3038] | 195 | /// Array parameters
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[3034] | 196 | void SetArray1f(const std::string &name, float *vals, int numElements);
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| 197 | void SetArray2f(const std::string &name, float *vals, int numElements);
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| 198 | void SetArray3f(const std::string &name, float *vals, int numElements);
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[3038] | 199 | /// Sets a matrix parameter
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[3034] | 200 | void SetMatrix(const std::string &name, const Matrix4x4 &mat);
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| 201 | /** Sets the texture parameter.
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| 202 | */
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| 203 | void SetTexture(const std::string &name, unsigned int tex);
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[3025] | 204 |
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[3028] | 205 | /** Binds the program.
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| 206 | */
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[3025] | 207 | void Bind();
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[3028] | 208 | /** Returns true if this program is valid.
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| 209 | */
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[3033] | 210 | inline bool IsValid() const { return mProgram != NULL; }
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[3034] | 211 | /** Enable / disable a texture parameter.
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| 212 | */
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| 213 | //void EnableTexture(const std::string &name);
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| 214 | //void DisableTexture(const std::string &name);
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[3025] | 215 |
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| 216 |
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[3033] | 217 |
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[3025] | 218 | protected:
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| 219 |
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[3034] | 220 | inline int GetParamIdxByName(const std::string &name) const;
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[3033] | 221 |
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[3034] | 222 | inline CGparameter GetParameter(int idx) const;
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| 223 |
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[3025] | 224 | CGparameter GetOrCreateParameter(const std::string &name);
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| 225 |
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| 226 |
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[3033] | 227 | ///////////////
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[3025] | 228 |
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[3033] | 229 | CGParameterMap mParamHash;
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| 230 |
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[3021] | 231 | CGprogram mProgram;
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[3032] | 232 |
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[3033] | 233 | CGParameterArray mTextureParams;
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[3032] | 234 | CGParameterArray mParameters;
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[3021] | 235 | };
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| 236 |
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[3025] | 237 |
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[3021] | 238 |
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| 239 | } // namespace
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| 240 |
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| 241 | #endif // _ShaderProgram_H__ |
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