Changeset 2869 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SsaoShader.cpp

Timestamp:

08/26/08 18:09:03 (16 years ago)

Author:

mattausch

Message:

computing ao in nice function ... but slow!!

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SsaoShader.cpp (modified) (6 diffs)

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

@@ -21 +21 @@
 static CGprogram sCgDeferredProgram2 = NULL;
 static CGprogram sCgAntiAliasingProgram = NULL;
+static CGprogram sCgCombineProgram = NULL;
+
+static CGparameter sColorsTexCombineParam;
+static CGparameter sSsaoTexCombineParam;
 
 static CGparameter sColorsTexDeferredParam;
@@ -91 +95 @@
         // the diffuse color buffer
         mFbo3->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
-        
+                
+        mFbo4 = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
+        // the diffuse color buffer
+        mFbo4->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR, false);
 
         // create noise texture for ssao
@@ -131 +138 @@
         else
                 cerr << "deferred program failed to load" << endl;
+
+
+        sCgCombineProgram = 
+                cgCreateProgramFromFile(context, 
+                                                                CG_SOURCE,
+                                                                "src/shaders/ssao.cg", 
+                                                                RenderState::sCgFragmentProfile,
+                                                                "combined",
+                                                                NULL);
+
+        if (sCgCombineProgram != NULL)
+        {
+                cgGLLoadProgram(sCgCombineProgram);
+
+                // we need size of texture for scaling
+                sColorsTexCombineParam = cgGetNamedParameter(sCgCombineProgram, "colors");  
+                sSsaoTexCombineParam = cgGetNamedParameter(sCgCombineProgram, "ssaoTex"); 
+        }
+        else
+                cerr << "combined program failed to load" << endl;
 
 
@@ -230 +257 @@
         FirstPass(fbo);
         ComputeSsao(fbo, expFactor);
+        Combine(fbo);
         AntiAliasing(fbo);
 
@@ -415 +443 @@
 void SsaoShader::AntiAliasing(FrameBufferObject *fbo)
 {
-        GLuint colorsTex = mNewFbo->GetColorBuffer(0)->GetTexture();
+        GLuint colorsTex = mFbo4->GetColorBuffer(0)->GetTexture();
+        //GLuint colorsTex = mNewFbo->GetColorBuffer(0)->GetTexture();
         GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
         
@@ -503 +532 @@
 }
 
+
+void SsaoShader::Combine(FrameBufferObject *fbo)
+{
+        GLuint colorsTex = mFbo3->GetColorBuffer(0)->GetTexture();
+        GLuint ssaoTex = mNewFbo->GetColorBuffer(0)->GetTexture();
+
+        mFbo4->Bind();
+        //mNewFbo->Bind();
+
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        
+        glDrawBuffers(1, mymrt);
+
+        cgGLEnableProfile(RenderState::sCgFragmentProfile);
+
+        cgGLBindProgram(sCgCombineProgram);
+
+        cgGLSetTextureParameter(sColorsTexCombineParam, colorsTex);
+        cgGLEnableTextureParameter(sColorsTexCombineParam);
+
+        cgGLSetTextureParameter(sSsaoTexCombineParam, ssaoTex);
+        cgGLEnableTextureParameter(sSsaoTexCombineParam);
+
+        glColor3f(1.0f, 1.0f, 1.0f);
+
+        const float offs = 0.5f;
+
+        glBegin(GL_QUADS);
+
+        glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
+        glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
+        glTexCoord2f(1, 1); glVertex3f( offs,  offs, -0.5f);
+        glTexCoord2f(0, 1); glVertex3f(-offs,  offs, -0.5f);
+
+        glEnd();
+
+        cgGLDisableTextureParameter(sColorsTexCombineParam);
+        cgGLDisableTextureParameter(sSsaoTexCombineParam);
+
+        cgGLDisableProfile(RenderState::sCgFragmentProfile);
+
+        FrameBufferObject::Release();
+
+        PrintGLerror("deferred shading");
+}
+
+
 } // namespace