[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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[3113] | 6 | #include "Matrix4x4.h"
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[3021] | 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 ShadowMap;
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| 20 | class DirectionalLight;
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[3033] | 21 | class ShaderProgram;
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[3021] | 22 |
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[3033] | 23 |
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| 24 | typedef std::map<std::string, int> CGParameterMap;
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[3025] | 25 | typedef std::vector<CGparameter> CGParameterArray;
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[3021] | 26 |
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[3025] | 27 |
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[3038] | 28 | /** This class represents the parameter values for a given GPU program.
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| 29 | */
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[3029] | 30 | class GPUProgramParameters
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| 31 | {
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[3034] | 32 | public:
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[3045] | 33 | /** Default construction.
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| 34 | */
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| 35 | GPUProgramParameters();
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[3114] | 36 | /** Constructor which initializes this parameter set for a given program.
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[3036] | 37 | */
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| 38 | GPUProgramParameters(ShaderProgram *p);
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[3114] | 39 | /** Sets the assoziated program (a 1:n relationship)
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| 40 | */
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[3036] | 41 | void SetProgram(ShaderProgram *p) { mProgram = p; }
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| 42 | /** Resets this parameter set.
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| 43 | */
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| 44 | void Reset();
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| 45 |
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| 46 |
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[3034] | 47 | ///////////
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| 48 | //-- set parameters by index
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| 49 |
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[3033] | 50 | void SetValue1f(int idx, float value);
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| 51 | void SetValue2f(int idx, float val1, float val2);
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| 52 | void SetValue3f(int idx, float val1, float val, float val3);
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| 53 |
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| 54 | void SetArray1f(int idx, float *vals, int numElements);
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| 55 | void SetArray2f(int idx, float *vals, int numElements);
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| 56 | void SetArray3f(int idx, float *vals, int numElements);
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[3113] | 57 | /** Sets a texture parameter.
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[3033] | 58 | */
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| 59 | void SetTexture(int idx, unsigned int tex);
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[3113] | 60 | /** Sets a matrix parameter.
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[3033] | 61 | */
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[3113] | 62 | void SetMatrix(int idx, const Matrix4x4 &mat);
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[3112] | 63 | /** Sets an array of matrices
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| 64 | */
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| 65 | void SetMatrixArray(int idx, float *vals, int numElements);
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[3033] | 66 |
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[3113] | 67 |
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[3045] | 68 | ////////////
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| 69 | //-- The following parameters are updated and set automatically once per frame.
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[3034] | 70 |
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[3045] | 71 | /** This parameter is connected to a timer that is updated once per frame.
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| 72 | */
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| 73 | void SetTimerParam(int idx);
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[3115] | 74 |
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| 75 | void SetOldTimerParam(int idx);
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[3046] | 76 | /** This parameter is connected to the current view matrix
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| 77 | that is updated once per frame.
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[3045] | 78 | */
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| 79 | void SetViewMatrixParam(int idx);
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[3046] | 80 | /** This parameter is connected to the current view direction
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| 81 | that is updated once per frame.
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[3045] | 82 | */
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[3046] | 83 | void SetViewDirParam(int idx);
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| 84 | /** This parameter is connected to the current light direction
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| 85 | that is updated once per frame.
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| 86 | */
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| 87 | void SetLightDirParam(int idx);
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[3114] | 88 | /** This parameter is connected to the current light direction
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| 89 | that is updated once per frame.
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| 90 | */
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| 91 | void SetModelMatrixParam(int idx);
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| 92 | /** This parameter is connected to the current light direction
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| 93 | that is updated once per frame.
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| 94 | */
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| 95 | void SetOldModelMatrixParam(int idx);
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[3045] | 96 |
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| 97 |
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[3114] | 98 |
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[3034] | 99 | ///////////
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| 100 | //-- set parameters by name (slower!)
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| 101 |
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| 102 |
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[3033] | 103 | void SetValue1f(const std::string &name, float value);
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| 104 | void SetValue2f(const std::string &name, float val1, float val2);
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| 105 | void SetValue3f(const std::string &name, float val1, float val, float val3);
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| 106 |
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| 107 | void SetArray1f(const std::string &name, float *vals, int numElements);
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| 108 | void SetArray2f(const std::string &name, float *vals, int numElements);
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| 109 | void SetArray3f(const std::string &name, float *vals, int numElements);
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[3112] | 110 |
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[3033] | 111 | /** Sets the texture parameter.
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| 112 | */
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| 113 | void SetTexture(const std::string &name, unsigned int tex);
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| 114 | /** Sets the matrix parameter.
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| 115 | */
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[3113] | 116 | void SetMatrix(const std::string &name, const Matrix4x4 &mat);
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[3112] | 117 | /** Sets an array of matrices
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| 118 | */
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| 119 | void SetMatrixArray(const std::string &name, float *vals, int numElements);
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[3034] | 120 | /** Feeds the shader program with the parameter values.
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| 121 | */
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[3114] | 122 | void UpdateParameters(SceneEntity *ent = NULL);
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[3045] | 123 | /** Function should be called once per frame to update frame related parameters.
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| 124 | */
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[3046] | 125 | static void InitFrame(Camera *cam, DirectionalLight *light);
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[3033] | 126 |
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[3038] | 127 |
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[3034] | 128 | protected:
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| 129 |
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| 130 | struct FloatParam
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[3029] | 131 | {
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[3036] | 132 | FloatParam(): mValid(false), mNumComponents(0) {}
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| 133 |
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| 134 | FloatParam(float *val, int comp):
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| 135 | mNumComponents(comp), mValid(true)
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| 136 | {
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| 137 | for (int i = 0; i < mNumComponents; ++ i)
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| 138 | mValues[i] = val[i];
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| 139 | }
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| 140 |
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| 141 | bool mValid;
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[3032] | 142 | float mValues[4];
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[3034] | 143 | int mNumComponents;
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[3029] | 144 | };
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| 145 |
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[3034] | 146 | struct IntParam
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[3033] | 147 | {
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[3036] | 148 | IntParam(): mValid(false) {}
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| 149 | IntParam(float val): mValue(val), mValid(true) {}
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[3034] | 150 |
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[3036] | 151 | bool mValid;
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[3033] | 152 | float mValue;
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| 153 | };
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| 154 |
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[3034] | 155 | struct MatrixParam
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[3033] | 156 | {
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[3113] | 157 | MatrixParam(): mValue(IdentityMatrix()), mValid(false) {}
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[3036] | 158 |
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[3113] | 159 | MatrixParam(const Matrix4x4 &mat): mValue(mat), mValid(true)
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[3036] | 160 | {}
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| 161 |
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| 162 | bool mValid;
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[3113] | 163 | Matrix4x4 mValue;
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[3033] | 164 | };
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| 165 |
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[3034] | 166 | struct ArrayParam
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[3029] | 167 | {
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[3036] | 168 | ArrayParam(): mValues(NULL), mNumEntries(0), mNumComponents(0), mValid(false) {}
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| 169 | ArrayParam(float *val, int comp, int numEntries):
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| 170 | mValues(val), mNumComponents(comp), mNumEntries(numEntries), mValid(true)
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| 171 | {}
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[3032] | 172 |
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[3036] | 173 | bool mValid;
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[3033] | 174 | float *mValues;
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[3036] | 175 |
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[3033] | 176 | int mNumEntries;
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[3034] | 177 | int mNumComponents;
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[3029] | 178 | };
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| 179 |
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[3112] | 180 |
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| 181 | struct MatrixArrayParam
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| 182 | {
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| 183 | MatrixArrayParam(): mValues(NULL), mNumEntries(0), mValid(false) {}
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| 184 | MatrixArrayParam(float *mats, int numEntries):
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| 185 | mValues(mats), mNumEntries(numEntries), mValid(true)
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| 186 | {}
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| 187 |
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| 188 | bool mValid;
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| 189 | float *mValues;
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| 190 |
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| 191 | int mNumEntries;
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| 192 | };
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| 193 |
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| 194 |
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[3045] | 195 | /// the program this parameter set is connected to
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[3033] | 196 | ShaderProgram *mProgram;
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| 197 |
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[3045] | 198 | int mTimerParam;
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[3115] | 199 | int mOldTimerParam;
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[3046] | 200 | int mViewDirParam;
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| 201 | int mLightDirParam;
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[3045] | 202 | int mViewMatrixParam;
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[3114] | 203 | int mModelMatrixParam;
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| 204 | int mOldModelMatrixParam;
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[3045] | 205 |
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[3034] | 206 | std::vector<FloatParam> mFloats;
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| 207 | std::vector<IntParam> mTextures;
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| 208 | std::vector<MatrixParam> mMatrices;
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| 209 | std::vector<ArrayParam> mArrays;
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[3112] | 210 | std::vector<MatrixArrayParam> mMatrixArrays;
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[3029] | 211 | };
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| 212 |
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| 213 |
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[3038] | 214 | /** This class represents a wrapper for a GPU shader program (vertex or fragment).
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| 215 | */
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[3021] | 216 | class ShaderProgram
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| 217 | {
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[3033] | 218 | friend class GPUProgramParameters;
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| 219 |
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[3021] | 220 | public:
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| 221 |
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[3147] | 222 | enum PROGRAM_TYPE {FRAGMENT_PROGRAM, VERTEX_PROGRAM};
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| 223 |
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| 224 |
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[3021] | 225 | ShaderProgram(CGprogram program): mProgram(program) {}
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| 226 |
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[3025] | 227 | ShaderProgram(CGcontext context,
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| 228 | const std::string &filename,
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| 229 | CGprofile profile,
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[3147] | 230 | const std::string &functionName,
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| 231 | PROGRAM_TYPE type);
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[3021] | 232 |
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[3025] | 233 | ~ShaderProgram() { if (mProgram != NULL) cgDestroyProgram(mProgram); }
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| 234 |
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[3038] | 235 | /** Assigns a parameter to the specified index.
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| 236 | */
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| 237 | CGparameter AddParameter(const std::string &name, int idx);
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[3104] | 238 | /** Comvenience method that adds an array of parameters beginning with
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| 239 | index i of size numElements
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| 240 | */
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| 241 | void AddParameters(std::string params[], int startIdx, int numElements);
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[3038] | 242 |
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| 243 | //////////////
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| 244 | //-- set shader parameters per index
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| 245 |
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[3033] | 246 | void SetValue1f(int idx, float value);
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| 247 | void SetValue2f(int idx, float val1, float val2);
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| 248 | void SetValue3f(int idx, float val1, float val, float val3);
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[3025] | 249 |
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[3033] | 250 | void SetArray1f(int idx, float *vals, int numElements);
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| 251 | void SetArray2f(int idx, float *vals, int numElements);
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| 252 | void SetArray3f(int idx, float *vals, int numElements);
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| 253 | void SetMatrix(int idx, const Matrix4x4 &mat);
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[3112] | 254 | void SetMatrixArray(int idx, float *mats, int numElements);
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[3033] | 255 |
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| 256 | void SetTexture(int idx, unsigned int tex);
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| 257 |
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[3038] | 258 |
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| 259 | ////////////
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| 260 | //-- set shader parameters per parameter name (slow!)
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| 261 |
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| 262 | /// Float parameters
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[3034] | 263 | void SetValue1f(const std::string &name, float value);
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| 264 | void SetValue2f(const std::string &name, float val1, float val2);
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| 265 | void SetValue3f(const std::string &name, float val1, float val, float val3);
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[3038] | 266 | /// Array parameters
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[3034] | 267 | void SetArray1f(const std::string &name, float *vals, int numElements);
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| 268 | void SetArray2f(const std::string &name, float *vals, int numElements);
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| 269 | void SetArray3f(const std::string &name, float *vals, int numElements);
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[3046] | 270 | /** Sets a matrix parameter
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| 271 | */
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[3034] | 272 | void SetMatrix(const std::string &name, const Matrix4x4 &mat);
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[3112] | 273 | /** Sets array of matrices
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| 274 | */
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| 275 | void SetMatrixArray(const std::string &name, float *mats, int numElements);
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[3034] | 276 | /** Sets the texture parameter.
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| 277 | */
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| 278 | void SetTexture(const std::string &name, unsigned int tex);
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[3028] | 279 | /** Binds the program.
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| 280 | */
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[3025] | 281 | void Bind();
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[3046] | 282 | /** Releases all texture resources.
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[3034] | 283 | */
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[3046] | 284 | void Release();
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[3025] | 285 |
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[3147] | 286 | /** Returns true if this program is valid.
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| 287 | */
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| 288 | inline bool IsValid() const {return mProgram != NULL;}
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| 289 |
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[3025] | 290 |
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[3147] | 291 | /** Returns type of program (fragment program or vertex program}
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| 292 | */
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| 293 | inline PROGRAM_TYPE GetProgramType() const {return mProgramType;}
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| 294 | /** See get
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| 295 | */
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| 296 | inline void SetProgramType(PROGRAM_TYPE type) {mProgramType = type;}
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| 297 |
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| 298 |
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[3025] | 299 | protected:
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| 300 |
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[3034] | 301 | inline int GetParamIdxByName(const std::string &name) const;
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[3033] | 302 |
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[3034] | 303 | inline CGparameter GetParameter(int idx) const;
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| 304 |
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[3025] | 305 | CGparameter GetOrCreateParameter(const std::string &name);
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| 306 |
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| 307 |
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[3033] | 308 | ///////////////
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[3025] | 309 |
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[3033] | 310 | CGParameterMap mParamHash;
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| 311 |
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[3021] | 312 | CGprogram mProgram;
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[3032] | 313 |
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[3033] | 314 | CGParameterArray mTextureParams;
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[3032] | 315 | CGParameterArray mParameters;
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[3147] | 316 |
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| 317 | PROGRAM_TYPE mProgramType;
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[3021] | 318 | };
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| 319 |
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[3025] | 320 |
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[3021] | 321 |
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| 322 | } // namespace
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| 323 |
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| 324 | #endif // _ShaderProgram_H__ |
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