[2952] | 1 | #ifndef _DEFERREDRENDERER_H__
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| 2 | #define _DEFERREDRENDERER_H__
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[2858] | 3 |
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| 4 | #include "common.h"
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[3085] | 5 | #include "Matrix4x4.h"
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| 6 | #include "Vector3.h"
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[2896] | 7 |
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[2858] | 8 | namespace CHCDemoEngine
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| 9 | {
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| 10 |
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| 11 | class FrameBufferObject;
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[2860] | 12 | class Vector3;
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[3062] | 13 | class PerspectiveCamera;
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[2861] | 14 | class Matrix4x4;
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[2896] | 15 | class ShadowMap;
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[2952] | 16 | class DirectionalLight;
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[2858] | 17 |
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[2896] | 18 |
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[3019] | 19 |
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| 20 |
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[2859] | 21 | /** This class implements a deferred shading algorithm that takes
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| 22 | a frame buffer object as input and outputs an image in the given size
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[2858] | 23 | */
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[2896] | 24 | class DeferredRenderer
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[2858] | 25 | {
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| 26 | public:
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[2874] | 27 | /** Constructor for a deferred shader taking the requested output image size,
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[3068] | 28 | the current camera;
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[2858] | 29 | */
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[3068] | 30 | DeferredRenderer(int w, int h, PerspectiveCamera *cam);
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[2874] | 31 | /** The algorithm renders the scene given an fbo consists of 1 color buffer,
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[2861] | 32 | 1 position buffer, and 1 normal buffer.
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| 33 | We also need the projection view matrix of the last frame for reprojection, and
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| 34 | a smoothing factor for temporal coherence
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[2858] | 35 | */
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[3021] | 36 |
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| 37 | ~DeferredRenderer();
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| 38 |
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[2900] | 39 | void Render(FrameBufferObject *fbo,
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[2901] | 40 | float tempCohFactor,
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[2952] | 41 | DirectionalLight *light,
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[2991] | 42 | bool useToneMapping,
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[3175] | 43 | bool useAntiAliasing,
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[2991] | 44 | ShadowMap *shadowMap = NULL
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| 45 | );
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[2859] | 46 |
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[3021] | 47 |
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[2875] | 48 | void SetUseTemporalCoherence(bool temporal);
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[2874] | 49 |
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[2930] | 50 | enum SAMPLING_METHOD {SAMPLING_POISSON, SAMPLING_QUADRATIC, SAMPLING_DEFAULT};
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[2896] | 51 | enum SHADING_METHOD {DEFAULT, SSAO, GI};
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[3068] | 52 | /** Set the samplig method for the indirect illumination
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| 53 | */
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[2896] | 54 | void SetSamplingMethod(SAMPLING_METHOD s);
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[3068] | 55 | /** Set the shading method (SSAO, SSAO + color bleeding
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| 56 | */
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[2897] | 57 | void SetShadingMethod(SHADING_METHOD s);
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[3021] | 58 |
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[3068] | 59 | // hack: store the color buffer idx for the currently used flip flop-MRT here
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[3038] | 60 | // TODO matt: make this less hacky
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[2976] | 61 | static int colorBufferIdx;
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[2887] | 62 |
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[3038] | 63 |
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[2859] | 64 | protected:
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| 65 |
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[3085] | 66 | void ComputeSsao(FrameBufferObject *fbo, float tempCohFactor);
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[2859] | 67 |
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[3085] | 68 | void ComputeGlobIllum(FrameBufferObject *fbo, float tempCohFactor);
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[2873] | 69 |
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[2952] | 70 | void FirstPass(FrameBufferObject *fbo, DirectionalLight *light);
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[2868] | 71 |
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[2952] | 72 | void FirstPassShadow(FrameBufferObject *fbo, DirectionalLight *light, ShadowMap *shadowMap);
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[2896] | 73 |
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[3038] | 74 | void ComputeToneParameters(FrameBufferObject *fbo,
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| 75 | DirectionalLight *light,
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| 76 | float &imageKey,
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| 77 | float &whiteLum,
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| 78 | float &middleGrey);
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[2972] | 79 |
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[3007] | 80 | void ToneMap(FrameBufferObject *fbo, float imageKey, float whiteLum, float middleGrey);
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[2972] | 81 |
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[2973] | 82 |
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[2880] | 83 | void CombineSsao(FrameBufferObject *fbo);
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| 84 | void CombineIllum(FrameBufferObject *fbo);
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| 85 |
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[2970] | 86 | void AntiAliasing(FrameBufferObject *fbo, DirectionalLight *light);
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[3006] | 87 | /** Downsample buffer of fbo to buffer of downSampleFbo. The downSampleFbo must have half the
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| 88 | resolution of fbo.
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| 89 | */
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[3137] | 90 | void DownSample(FrameBufferObject *fbo,
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| 91 | int bufferIdx,
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| 92 | FrameBufferObject *downSampleFbo,
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| 93 | int downSampleBufferIdx,
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| 94 | ShaderProgram *program);
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[2972] | 95 |
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[3026] | 96 | void DrawQuad(ShaderProgram *p);
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[2972] | 97 |
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[3132] | 98 | void Output(FrameBufferObject *fbo);
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| 99 |
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[3038] | 100 | /** Initialises the deferred shader and loads the required shaders:
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| 101 | This function has to be called only once.
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| 102 | */
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| 103 | void InitCg();
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[3085] | 104 | /** Is called once per render call and sets the most important parameters.
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| 105 | */
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| 106 | void InitFrame();
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[3026] | 107 |
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[3132] | 108 | void FlipFbos(FrameBufferObject *fbo);
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[3026] | 109 |
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[3155] | 110 | void PrepareSsao(FrameBufferObject *fbo);
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[3132] | 111 |
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[3167] | 112 | void SortSamples();
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[3155] | 113 |
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| 114 |
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[2859] | 115 | ////////////
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| 116 |
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| 117 | int mWidth;
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| 118 | int mHeight;
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| 119 |
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[3062] | 120 | PerspectiveCamera *mCamera;
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[2860] | 121 |
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[2875] | 122 | bool mUseTemporalCoherence;
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[2887] | 123 |
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[2896] | 124 | int mSamplingMethod;
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| 125 |
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| 126 | int mShadingMethod;
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| 127 |
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| 128 | bool mRegenerateSamples;
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[2976] | 129 |
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[3019] | 130 | int mIllumFboIndex;
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| 131 | // the fbo for indirect illumination (ssao + color bleeding)
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| 132 | FrameBufferObject *mIllumFbo;
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[2994] | 133 |
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| 134 | FrameBufferObject *mDownSampleFbo;
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[3019] | 135 |
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| 136 | FBOContainer mFBOs;
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| 137 |
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| 138 | static ShaderContainer sShaders;
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[3085] | 139 |
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| 140 | Matrix4x4 mProjViewMatrix;
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| 141 | Matrix4x4 mOldProjViewMatrix;
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| 142 |
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| 143 | Vector3 mCornersView[4];
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| 144 | Vector3 mOldCornersView[4];
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| 145 |
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| 146 | Vector3 mEyePos;
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| 147 | Vector3 mOldEyePos;
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[2858] | 148 | };
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| 149 |
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[3038] | 150 |
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[2858] | 151 | } // namespace
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[2886] | 152 |
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[2859] | 153 | #endif // _SsaoShader_H__ |
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