Changeset 2973

Timestamp:

09/25/08 11:05:46 (16 years ago)

Author:

mattausch

Message:

 

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling/src

Files:

• DeferredRenderer.cpp (modified) (22 diffs)
• DeferredRenderer.h (modified) (1 diff)
• shaders/antialiasing.cg (modified) (2 diffs)
• shaders/tonemap.cg (modified) (4 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/DeferredRenderer.cpp

@@ -110 +110 @@
 static CGparameter sColorsTexToneParam;
 static CGparameter sIntensityTexDownSampleParam;
+
 
 
@@ -419 +420 @@
                 cgGLLoadProgram(sCgAntiAliasingProgram);
 
-                sImageKeyParam = cgGetNamedParameter(sCgAntiAliasingProgram, "imageKey");
-                sMiddleGreyParam = cgGetNamedParameter(sCgAntiAliasingProgram, "middleGrey");
-                sWhiteLumParam = cgGetNamedParameter(sCgAntiAliasingProgram, "whiteLum");
-
                 sColorsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "colors");  
                 sNormalsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "normals");
@@ -465 +462 @@
                 cerr << "deferred program failed to load" << endl;
 
+        sCgToneProgram = 
+                cgCreateProgramFromFile(context, 
+                                                                CG_SOURCE,
+                                                                "src/shaders/tonemap.cg", 
+                                                                RenderState::sCgFragmentProfile,
+                                                                "ToneMap",
+                                                                NULL);
+
+        if (sCgToneProgram != NULL)
+        {
+                cgGLLoadProgram(sCgToneProgram);
+
+                sImageKeyParam = cgGetNamedParameter(sCgToneProgram, "imageKey");
+                sMiddleGreyParam = cgGetNamedParameter(sCgToneProgram, "middleGrey");
+                sWhiteLumParam = cgGetNamedParameter(sCgToneProgram, "whiteLum");
+
+                sColorsTexToneParam = cgGetNamedParameter(sCgToneProgram, "colors");  
+        }
+        else
+                cerr << "tone program failed to load" << endl;
+
+        sCgInitialIntensityProgram = 
+                cgCreateProgramFromFile(context, 
+                                                                CG_SOURCE,
+                                                                "src/shaders/tonemap.cg", 
+                                                                RenderState::sCgFragmentProfile,
+                                                                "GreyScaleDownSample",
+                                                                NULL);
+
+        if (sCgInitialIntensityProgram != NULL)
+        {
+                cgGLLoadProgram(sCgInitialIntensityProgram);
+
+                // we need size of texture for scaling
+                sColorsTexInitialParam = cgGetNamedParameter(sCgInitialIntensityProgram, "colors");  
+        }
+        else
+                cerr << "intensity program failed to load" << endl;
+
+
+
         PrintGLerror("init");
 }
@@ -499 +537 @@
         glLoadIdentity();
 
+        colorBufferIdx = 0;
+
         const float offs = 0.5f;
         glOrtho(-offs, offs, -offs, offs, 0, 1);
@@ -510 +550 @@
         else
                 FirstPass(fbo, light);
+
+
+        float imageKey, whiteLum, middleGrey;
+
+        ComputeToneParameters(fbo, light, imageKey, whiteLum, middleGrey);
+
+        ToneMap(fbo, light, imageKey, whiteLum, middleGrey);
 
         switch (mShadingMethod)
@@ -575 +622 @@
 
         // read the second buffer, write to the first buffer
-        //mNewFbo->Bind();
         mFbo->Bind();
         glDrawBuffers(1, mrt + mFboIndex);
@@ -685 +731 @@
         ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
 
-        // we assume that we have a floating point rgba texture
-        float *pixels = (float *)colorBuffer->ReadTexture();
-
-        const int w = colorBuffer->GetHeight();
-        const int h = colorBuffer->GetWidth();
-
-        const float imageKey = ToneMapper().CalcImageKey(pixels, w, h);
-        const float whiteLum = 1.0f * ToneMapper().CalcMaxLuminance(pixels, w, h);
-
-        //const float minKey = 0.18f;
-        //const float maxKey = 0.72f;
-
-        //const float minKey = 0.0045f;
-        const float minKey = 0.09f;
-        const float maxKey = 0.5f;
-
-        const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
-        const float middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
-
-        //cout << "middlegrey: " << middleGrey << endl;
-        delete [] pixels;
-
         GLuint colorsTex = colorBuffer->GetTexture();
         GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
@@ -720 +744 @@
         cgGLSetTextureParameter(sNormalsTexAntiAliasingParam, normalsTex);
         cgGLEnableTextureParameter(sNormalsTexAntiAliasingParam);
-
-        cgGLSetParameter1f(sImageKeyParam, imageKey);
-        cgGLSetParameter1f(sWhiteLumParam, whiteLum);
-        cgGLSetParameter1f(sMiddleGreyParam, middleGrey);
 
 
@@ -752 +772 @@
 void DeferredRenderer::FirstPass(FrameBufferObject *fbo, DirectionalLight *light)
 {
-        GLuint colorsTex = fbo->GetColorBuffer(0)->GetTexture();
+        GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
         GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
         GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
@@ -758 +778 @@
         fbo->Bind();
 
-        colorBufferIdx = 3;
+        colorBufferIdx = 3 - colorBufferIdx;
         glDrawBuffers(1, mrt + colorBufferIdx);
 
@@ -912 +932 @@
 void DeferredRenderer::CombineIllum(FrameBufferObject *fbo)
 {
-        GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
+        GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
 
         GLuint ssaoTex = mFbo->GetColorBuffer(mFboIndex)->GetTexture();
@@ -921 +941 @@
 
         // overwrite old color texture
-        colorBufferIdx = 0;
+        colorBufferIdx = 3 - colorBufferIdx;
+
         glDrawBuffers(1, mrt + colorBufferIdx);
 
@@ -967 +988 @@
 void DeferredRenderer::CombineSsao(FrameBufferObject *fbo)
 {
-        GLuint colorsTex = fbo->GetColorBuffer(3)->GetTexture();
+        fbo->Bind();
+
+        GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
         GLuint ssaoTex = mFbo->GetColorBuffer(mFboIndex)->GetTexture();
 
-        fbo->Bind();
-
         // overwrite old color texture
-        colorBufferIdx = 0;
+        colorBufferIdx = 3 - colorBufferIdx;
         glDrawBuffers(1, mrt + colorBufferIdx);
 
@@ -1017 +1038 @@
                                                                            ShadowMap *shadowMap)
 {
-        GLuint colorsTex = fbo->GetColorBuffer(0)->GetTexture();
+        fbo->Bind();
+
+        GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
 
         GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
@@ -1026 +1049 @@
         shadowMap->GetTextureMatrix(shadowMatrix);
 
-        fbo->Bind();
-
-        colorBufferIdx = 3;
+        colorBufferIdx = 3 - colorBufferIdx;
         glDrawBuffers(1, mrt + colorBufferIdx);
 
@@ -1049 +1070 @@
 
         cgGLSetParameter1f(sMaxDepthShadowParam, mScaleFactor);
+
         //cgGLSetParameter1f(sSampleWidthParam, 10.0f / shadowMap->GetSize());
         cgGLSetParameter1f(sSampleWidthParam, 2.0f / shadowMap->GetSize());
-        //cgGLSetParameter1f(sSampleWidthParam, 2.0f / 2048);
+        
          
         cgGLSetMatrixParameterfc(sShadowMatrixParam, (const float *)shadowMatrix.x);
@@ -1108 +1130 @@
 
 
-void DeferredRenderer::ComputeToneParameters(FrameBufferObject *fbo)
+void DeferredRenderer::ComputeToneParameters(FrameBufferObject *fbo, 
+                                                                                         DirectionalLight *light,
+                                                                                         float &imageKey, 
+                                                                                         float &whiteLum,
+                                                                                         float &middleGrey)
 {
         ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
 
+        // we assume that we have a floating point rgba texture
+        float *pixels = (float *)colorBuffer->ReadTexture();
+        
+        const int w = colorBuffer->GetHeight();
+        const int h = colorBuffer->GetWidth();
+
+        imageKey = ToneMapper().CalcImageKey(pixels, w, h);
+        whiteLum = 1.0f * ToneMapper().CalcMaxLuminance(pixels, w, h);
+
+        //const float minKey = 0.18f;
+        //const float maxKey = 0.72f;
+
+        //const float minKey = 0.0045f;
+        const float minKey = 0.09f;
+        const float maxKey = 0.5f;
+
+        const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
+        middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
+
+        //cout << "middlegrey: " << middleGrey << endl;
+        delete [] pixels;
+
+
+        /////////////
+
         GLuint colorsTex = colorBuffer->GetTexture();
-        
+
+        fbo->Bind();
+
+        colorBufferIdx = 3 - colorBufferIdx;
+        glDrawBuffers(1, mrt + colorBufferIdx);
+
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
@@ -1142 +1198 @@
         cgGLDisableTextureParameter(sColorsTexToneParam);
 
+        FrameBufferObject::Release();
+
         
         ////////////
@@ -1151 +1209 @@
         for (int i = 0; i < 32; ++ i)
         {
-                DownSample(fbo);
+                //DownSample(fbo);
         }
 
@@ -1160 +1218 @@
 void DeferredRenderer::DownSample(FrameBufferObject *fbo)
 {
-        GLuint intensityTex;
+        GLuint intensityTex=0;
         
         cgGLEnableProfile(RenderState::sCgFragmentProfile);
@@ -1170 +1228 @@
 
 
-void DeferredRenderer::ToneMap(FrameBufferObject *fbo, DirectionalLight *light)
+void DeferredRenderer::ToneMap(FrameBufferObject *fbo,
+                                                           DirectionalLight *light,
+                                                           float imageKey, 
+                                                           float whiteLum,
+                                                           float middleGrey)
 {
         ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
 
-        // we assume that we have a floating point rgba texture
-        float *pixels = (float *)colorBuffer->ReadTexture();
-
-        const int w = colorBuffer->GetHeight();
-        const int h = colorBuffer->GetWidth();
-
-        const float imageKey = ToneMapper().CalcImageKey(pixels, w, h);
-        const float whiteLum = 1.0f * ToneMapper().CalcMaxLuminance(pixels, w, h);
-
-        //const float minKey = 0.18f;
-        //const float maxKey = 0.72f;
-
-        //const float minKey = 0.0045f;
-        const float minKey = 0.09f;
-        const float maxKey = 0.5f;
-
-        const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
-        const float middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
-
-        //cout << "middlegrey: " << middleGrey << endl;
-        delete [] pixels;
+        fbo->Bind();
+
+        colorBufferIdx = 3 - colorBufferIdx;
+        glDrawBuffers(1, mrt + colorBufferIdx);
+
 
         GLuint colorsTex = colorBuffer->GetTexture();
@@ -1228 +1274 @@
 
         cgGLDisableTextureParameter(sColorsTexToneParam);
-
-        PrintGLerror("antialiasing");
+        FrameBufferObject::Release();
+
+        PrintGLerror("ToneMap");
 }
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/DeferredRenderer.h

@@ -75 +75 @@
         void FirstPassShadow(FrameBufferObject *fbo, DirectionalLight *light, ShadowMap *shadowMap);
 
-        void ComputeToneParameters(FrameBufferObject *fbo);
-        void ToneMap(FrameBufferObject *fbo, DirectionalLight *light);
+        void ComputeToneParameters(FrameBufferObject *fbo, DirectionalLight *light, float &imageKey, float &whiteLum, float &middleGrey);
+
+        void ToneMap(FrameBufferObject *fbo, DirectionalLight *light, float imageKey, float whiteLum, float middleGrey);
 
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/antialiasing.cg

@@ -21 +21 @@
 
 
-float3 ToneMap(float imageKey, float whiteLum, float middleGrey, float3 color)
-{
-        float3 outCol;
-        const float pixLum = 0.2125f * color.x + 0.7154f * color.y + 0.0721f * color.z;
-        
-        // adjust to middle gray
-        const float lum = middleGrey * pixLum / imageKey;
-         
-        // map to range and calc burnout
-        const float burnedLum = lum * (1.0f + lum / whiteLum * whiteLum) / (1.0f + lum);
-        
-        outCol = color * burnedLum / pixLum;
-
-        /*
-        outCol = color;
-
-        outCol.rgb *= MIDDLE_GRAY /(MIDDLE_GRAY + 0.001f);
-    outCol.rgb *= (1.0f + color.rgb / whiteLum);
-        outCol.rgb /= (1.0f + color.rgb);
-*/
-        //vColor.rgb += 0.6f * vBloom;
-        
-        return outCol;
-}
-
-
 float4 main(v2p IN, 
                         uniform sampler2D colors,
-                        uniform sampler2D normals,
-                        uniform float imageKey,
-                        uniform float whiteLum,
-                        uniform float middleGrey
+                        uniform sampler2D normals
                         ): COLOR
 {
@@ -121 +92 @@
         //return (s0 + s1 + s2 + s3) * 0.25f;
 
-        //return float4(w);
-        col.xyz = ToneMap(imageKey, whiteLum, middleGrey, col.xyz);
-
         return col;
 }

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/tonemap.cg

@@ -7 +7 @@
         float4 pos: WPOS;
         float4 texCoord: TEXCOORD0; 
+
+        float2 lt: TEXCOORD1; // left top
+        float2 rb: TEXCOORD2; // right bottom
+        float2 rt: TEXCOORD3; // right top
+        float2 lb: TEXCOORD4; // left bottom
 };
 
 
-
-float3 ToneMap(float imageKey, float whiteLum, float middleGrey, float3 color)
+struct pixel
 {
-        float3 outCol;
-        const float pixLum = 0.2125f * color.x + 0.7154f * color.y + 0.0721f * color.z;
-        
-        // adjust to middle gray
-        const float lum = middleGrey * pixLum / imageKey;
-         
-        // map to range and calc burnout
-        const float burnedLum = lum * (1.0f + lum / whiteLum * whiteLum) / (1.0f + lum);
-        
-        outCol = color * burnedLum / pixLum;
-
-        return outCol;
-}
-
+        float4 col: COLOR0;
+};
 
 
@@ -37 +29 @@
     for(int i = 0; i < 16; ++ i)
     {
-        average += tex2D(colors, IN.texCoord + float2(downSampleOffs[i].x, downSampleOffs[i].y) );
+        average += tex2D(colors, IN.texCoord.xy + downSampleOffs[i]);
     }
         
@@ -47 +39 @@
 
 float4 GreyScaleDownSample(fragment IN,
-                                                   uniform sampler2D colors,
-                                                   float2 offs[16]): COLOR
+                                                   uniform sampler2D colors): COLOR
 {
 
@@ -55 +46 @@
         float maximum = -1e20;
 
-        float4 color = 0.0f;
-        
         // the rgb weights
         const float3 w = float3(0.299f, 0.587f, 0.114f);
         //float3 w = float3(0.2125f, 0.7154f, 0.0721f);
 
+        float4 cols[4];
+
+        cols[0] = tex2D(colors, IN.texCoord.xy + IN.lt.xy);
+        cols[1] = tex2D(colors, IN.texCoord.xy + IN.lb.xy);
+        cols[2] = tex2D(colors, IN.texCoord.xy + IN.rt.xy);
+        cols[3] = tex2D(colors, IN.texCoord.xy + IN.rb.xy);
+
+
         for (int i = 0; i < 4; ++ i)
         {
-                color = tex2D(colors, IN.texcoord + float2(offs[i].x, offs[i].y));
+                const float intensity = dot(cols[i].rgb, w);
 
-                const float intensity = dot(color.rgb, W);
-
-                maximum = max(maximum, intentsity);
-                average += (0.25f * log(1e-5f + GreyValue));
+                maximum = max(maximum, intensity);
+                average += (0.25f * log(1e-5f + intensity));
         }
 
         average = exp(average);
 
+        return tex2D(colors, IN.texCoord.xy);
+
         // Output the luminance to the render target
         return float4(average, maximum, 0.0f, 1.0f);
 }
+    
 
-    
-    
+pixel ToneMap(fragment IN,
+                          uniform sampler2D colors,
+                          uniform float imageKey, 
+                          uniform float whiteLum, 
+                          uniform float middleGrey)
+{
+        pixel OUT;
+        float4 color = tex2D(colors, IN.texCoord.xy);
+
+        const float pixLum = 0.2125f * color.x + 0.7154f * color.y + 0.0721f * color.z;
+        
+        // adjust to middle gray
+        const float lum = middleGrey * pixLum / imageKey;
+         
+        // map to range and calc burnout
+        const float scaleLum = lum * (1.0f + lum / whiteLum * whiteLum) / (1.0f + lum);
+
+        OUT.col = color * scaleLum / pixLum;
+        OUT.col.w = color.w;
+
+        return OUT;
+}