And after a great deal of slow debugging we have deferred blinn-phong. Yayso

data/shaders/fs_blur_ssao.glsl

@@ -0,0 +1,38 @@
+#version 150 core
+
+in vec2 ioFragTexCoords;
+
+out vec3 outColor;
+
+uniform sampler2D uColor;
+uniform sampler2D uAmbientOcclusion;
+uniform int uBlurSize;
+uniform int uDisableColor;
+
+float box_blur_occlusion (sampler2D ambient_occlusion, vec2 tex_coord, int size) {
+	vec2 texel_size = 1.0 / vec2(textureSize(uAmbientOcclusion, 0));
+
+	float value = 0.;
+	int count = 0;
+	for (int i = -size; i < size; i++) {
+		for (int j = -size; j < size; j++) {
+			value += texture(ambient_occlusion, tex_coord + vec2(i,j) * texel_size).x;
+			count++;
+		}
+	}
+
+	return value / (4 * size * size);
+}
+
+void main() {
+	float occlusion;
+	if (uBlurSize > 0) {
+		occlusion = box_blur_occlusion(uAmbientOcclusion, ioFragTexCoords, uBlurSize);
+	} else {
+		occlusion = texture(uAmbientOcclusion, ioFragTexCoords).x;
+	}
+
+	vec4 color = texture(uColor, ioFragTexCoords);
+
+	outColor = color.xyz * (1.0 - uDisableColor) * occlusion + uDisableColor * vec3(occlusion);
+}

data/shaders/fs_default.glsl

@@ -13,6 +13,9 @@ uniform sampler2DShadow uShadowMap;
 uniform sampler2D uShadowMap;
 #endif
 
+uniform mat4 uModelMatrix;
+uniform mat4 uViewMatrix;
+
 in vec3 ioFragPosition;
 in vec3 ioFragNormal;
 in vec2 ioFragTexCoords;
@@ -78,15 +81,16 @@ void main() {
 
 	// diffuse lighting
 	vec3 normal_dir = normalize(ioFragNormal);
-	vec3 light_dir = normalize(uLightDirection);
+//	vec3 light_dir = normalize(uLightDirection);
+	vec3 light_dir = transpose(inverse(mat3(uViewMatrix * uModelMatrix))) * uLightDirection;
 	float diff = max(dot(normal_dir, light_dir), 0.0);
 	vec4 diffuse = diff * albedo_color;
 
 	// specular lighting
-	vec3 view_dir = normalize(uViewPosition - ioFragPosition);
+	vec3 view_dir = normalize(-ioFragPosition);
 	vec3 halfway_dir = normalize(light_dir + view_dir);
 
-	float spec = pow(max(dot(normal_dir, halfway_dir), 0.0), 32);
+	float spec = pow(max(dot(normal_dir, halfway_dir), 0.0), 64);
 	vec4 specular = spec * vec4(0.5);
 
 	// shadow
@@ -94,5 +98,5 @@ void main() {
 	outColor = ambient + (1.0 - shadow) * (diffuse + specular);
 
 	outPosition = ioFragPosition.xyz;
-	outNormal = ioFragNormal;
+	outNormal = normalize(ioFragNormal);
 }

data/shaders/fs_deferred_geometry.glsl

@@ -0,0 +1,19 @@
+#version 150 core
+
+uniform vec4 uColor;
+uniform sampler2D uAlbedoTexture;
+
+in vec3 ioFragPosition;
+in vec3 ioFragNormal;
+in vec2 ioFragTexCoords;
+in vec4 ioFragColor;
+
+out vec4 outColor;
+out vec3 outNormal;
+out vec3 outPosition;
+
+void main() {
+	outColor = texture(uAlbedoTexture, ioFragTexCoords) * ioFragColor * uColor;
+	outNormal = normalize(ioFragNormal);
+	outPosition = ioFragPosition.xyz;
+}

data/shaders/fs_deferred_lighting.glsl

@@ -0,0 +1,50 @@
+#version 150 core
+
+uniform sampler2D uColor;
+uniform sampler2D uNormal;
+uniform sampler2D uDepth;
+
+#define USE_SAMPLER2D_SHADOW 1
+
+#ifdef USE_SAMPLER2D_SHADOW
+uniform sampler2DShadow uShadowMap;
+#else
+uniform sampler2D uShadowMap;
+#endif
+
+uniform sampler2D uPosition;
+uniform vec3 uViewPosition;
+
+uniform vec3 uLightDirection;
+uniform mat4 uLightSpaceMatrix;
+
+in vec2 ioFragTexCoords;
+
+out vec3 outColor;
+
+void main() {
+	vec3 color = texture(uColor, ioFragTexCoords).rgb;
+	vec3 normal = texture (uNormal, ioFragTexCoords).xyz;
+	float depth = texture (uDepth, ioFragTexCoords).r;
+	vec3 position = texture (uPosition, ioFragTexCoords).xyz;
+
+	// ambient lighting
+	float ambient_strength = 0.2;
+	vec3 ambient = ambient_strength * color;
+
+	vec3 light_dir = normalize(uLightDirection);
+
+	// diffuse lighting
+	float diff = max(dot(normal, light_dir), 0.0);
+	vec3 diffuse = diff * color;
+
+	// specular lighting
+	vec3 view_dir = normalize(-position); 
+	vec3 halfway_dir = normalize(light_dir + view_dir);
+
+	float spec = pow(max(dot(normal, halfway_dir), 0.0), 32);
+	vec3 specular = spec * vec3(0.5);
+
+	// shadow
+	outColor = ambient + (diffuse + specular);
+}

data/shaders/vs_deferred_geometry.glsl

@@ -0,0 +1,26 @@
+#version 150 core
+
+in vec4 inCoord;
+in vec3 inNormal;
+in vec2 inUV;
+in vec4 inColor;
+
+uniform mat4 uModelMatrix;
+uniform mat4 uViewMatrix;
+uniform mat4 uProjectionMatrix;
+
+out vec3 ioFragPosition;
+out vec3 ioFragNormal;
+out vec2 ioFragTexCoords;
+out vec4 ioFragColor;
+
+void main() {
+	mat4 model_view_matrix = uViewMatrix * uModelMatrix;
+
+	ioFragPosition = (model_view_matrix * inCoord).xyz;
+	ioFragNormal = transpose(inverse(mat3(model_view_matrix))) * inNormal;
+	ioFragTexCoords = inUV;
+	ioFragColor = inColor;
+
+	gl_Position = uProjectionMatrix * model_view_matrix * inCoord;
+}

src/modules/RenderModule.cc

@@ -15,9 +15,18 @@ struct Renderer;
 float moving_factor = 1.0f;
 
 struct RendererSettings {
-	bool DrawDepth = false;
 	bool DrawLightDepth = false;
-	bool DrawSSAO = false;
+	int RenderMode = 0;
+};
+
+enum SceneRenderMode {
+	SceneRenderModeDefault = 0,
+	SceneRenderModeColor = 1,
+	SceneRenderModeDepth = 2,
+	SceneRenderModeNormals = 3,
+	SceneRenderModePositions = 4,
+	SceneRenderModeAmbientOcclusion = 5,
+	SceneRenderModeCount
 };
 
 static RendererSettings sRendererSettings;
@@ -86,10 +95,10 @@ template <typename Serializer>
 static void module_serialize (
 		struct module_state *state,
 		Serializer* serializer) {
-	SerializeBool(*serializer, "protot.RenderModule.DrawDepth", sRendererSettings.DrawDepth);
 	SerializeBool(*serializer, "protot.RenderModule.DrawLightDepth", sRendererSettings.DrawLightDepth);
-	SerializeBool(*serializer, "protot.RenderModule.DrawSSAO", sRendererSettings.DrawSSAO);
+	SerializeInt(*serializer, "protot.RenderModule.RenderMode", sRendererSettings.RenderMode);
 
+	SerializeBool(*serializer, "protot.RenderModule.mUseDeferred", gRenderer->mUseDeferred);
 	SerializeBool(*serializer, "protot.RenderModule.mIsSSAOEnabled", gRenderer->mIsSSAOEnabled);
 	SerializeBool(*serializer, "protot.RenderModule.Camera.mIsOrthographic", gRenderer->mCamera.mIsOrthographic);
 	SerializeFloat(*serializer, "protot.RenderModule.Camera.mFov", gRenderer->mCamera.mFov);
@@ -374,12 +383,28 @@ void Renderer::Initialize(int width, int height) {
 	mRenderQuadProgramDepth.RegisterFileModification();
 	assert(load_result);
 
+	// Deferred geomemtry pass
+	mDeferredGeometry = RenderProgram("data/shaders/vs_deferred_geometry.glsl", "data/shaders/fs_deferred_geometry.glsl");
+	load_result = mDeferredGeometry.Load();
+	mDeferredGeometry.RegisterFileModification();
+	assert(load_result);
+
+	mDeferredLighting = RenderProgram("data/shaders/vs_passthrough.glsl", "data/shaders/fs_deferred_lighting.glsl");
+	load_result = mDeferredLighting.Load();
+	mDeferredLighting.RegisterFileModification();
+	assert(load_result);
+
 	// Program for SSAO
 	mSSAOProgram = RenderProgram("data/shaders/vs_passthrough.glsl", "data/shaders/fs_ssao.glsl");
 	load_result = mSSAOProgram.Load();
 	mSSAOProgram.RegisterFileModification();
 	assert(load_result);
 
+	mBlurSSAOProgram = RenderProgram("data/shaders/vs_passthrough.glsl", "data/shaders/fs_blur_ssao.glsl");
+	load_result = mBlurSSAOProgram.Load();
+	mBlurSSAOProgram.RegisterFileModification();
+	assert(load_result);
+
 	InitializeSSAOKernelAndNoise();
 
 	// Render Target
@@ -403,6 +428,11 @@ void Renderer::Initialize(int width, int height) {
 	// SSAO Target
 	mSSAOTarget.Initialize(width, height, RenderTarget::EnableColor);
 
+	// Postprocess Target
+	mPostprocessTarget.Initialize(width, height, RenderTarget::EnableColor);
+
+	mDeferredLightingTarget.Initialize(width, height, RenderTarget::EnableColor);
+
 	// Light
 	mLight.Initialize();
 	mLight.mShadowMapTarget.mVertexArray = &gVertexArray;
@@ -422,7 +452,6 @@ void Renderer::Shutdown() {
 	}
 }
 
-
 void Renderer::RenderGl() {
 	mSceneAreaWidth = mSceneAreaWidth < 1 ? 1 : mSceneAreaWidth;
 	mSceneAreaHeight = mSceneAreaHeight < 1 ? 1 : mSceneAreaHeight;
@@ -438,13 +467,30 @@ void Renderer::RenderGl() {
 			| RenderTarget::EnableNormalTexture;
 	}
 
+	if (mUseDeferred) {
+		required_render_flags = RenderTarget::EnableColor
+			| RenderTarget::EnableDepthTexture
+			| RenderTarget::EnableNormalTexture
+
+			// TODO: remove these
+			| RenderTarget::EnablePositionTexture
+			| RenderTarget::EnableLinearizedDepthTexture
+			;
+	}
+
 	if (mSceneAreaWidth != mRenderTarget.mWidth 
 			|| mSceneAreaHeight != mRenderTarget.mHeight
 			|| mRenderTarget.mFlags != required_render_flags ) {
 		mRenderTarget.Resize(mSceneAreaWidth, mSceneAreaHeight, required_render_flags);
+		mPostprocessTarget.Resize(mSceneAreaWidth, mSceneAreaHeight, RenderTarget::EnableColor);
+
 		if (mIsSSAOEnabled) {
 			mSSAOTarget.Resize(mSceneAreaWidth, mSceneAreaHeight, RenderTarget::EnableColor);
 		}
+
+		if (mUseDeferred) {
+			mDeferredLightingTarget.Resize(mSceneAreaWidth, mSceneAreaHeight, RenderTarget::EnableColor);
+		}
 	}
 
 	if (mCamera.mWidth != mSceneAreaWidth
@@ -491,9 +537,29 @@ void Renderer::RenderGl() {
 		gLog ("Cannot render: frame buffer invalid!");
 	}
 
+	glEnable(GL_DEPTH_TEST);
+	RenderProgram *program = &mDefaultProgram;
+	if (mUseDeferred) {
+		program = &mDeferredGeometry;
+		
+		GLenum buffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
+		glDrawBuffers(3, buffers);
+		glClear(GL_COLOR_BUFFER_BIT);
+	} else {
+		if (program->SetMat44("uLightSpaceMatrix", mLight.mLightSpaceMatrix) == -1) {
+			gLog ("Warning: Uniform %s not found!", "uLightSpaceMatrix");
+		}
+		GLenum buffers[] = { GL_COLOR_ATTACHMENT0};
+		glDrawBuffers (1, buffers);
+	}
+
 	// clear color and depth
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 	glEnable(GL_DEPTH_TEST);
+	glEnable(GL_LINE_SMOOTH);
+	glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
+	glEnable(GL_MULTISAMPLE);
+	glEnable(GL_CULL_FACE);
 
 	glUseProgram(mSimpleProgram.mProgramId);
 	mSimpleProgram.SetMat44("uModelViewProj", model_view_projection);
@@ -515,32 +581,23 @@ void Renderer::RenderGl() {
 		* mCamera.mViewMatrix
 		* mCamera.mProjectionMatrix;
 	mSimpleProgram.SetMat44("uModelViewProj", model_view_projection);
-	mSimpleProgram.SetVec4("uColor", Vector4f (1.0f, 1.0f, 1.0f, 0.4f));
+	mSimpleProgram.SetVec4("uColor", Vector4f (1.0f, 1.0f, 1.0f, 0.1f));
 	gVertexArray.Bind();
 	gXZPlaneGrid.Draw(GL_LINES);
 
 	// Scene
-	glUseProgram(mDefaultProgram.mProgramId);
+	glUseProgram(program->mProgramId);
-	glEnable(GL_DEPTH_TEST);
 
-	if (mDefaultProgram.SetMat44("uLightSpaceMatrix", mLight.mLightSpaceMatrix) == -1) {
+	RenderScene(*program, mCamera);
-		gLog ("Warning: Uniform %s not found!", "uLightSpaceMatrix");
+
+	if (mSettings->RenderMode == SceneRenderModeDepth) {
+		mRenderTarget.RenderToLinearizedDepth(mCamera.mNear, mCamera.mFar, mCamera.mIsOrthographic);
 	}
 
 	if (mIsSSAOEnabled) {
 		GLenum buffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT2, GL_COLOR_ATTACHMENT3 };
 		glDrawBuffers (3, buffers);
-	} else {
-		GLenum buffers[] = { GL_COLOR_ATTACHMENT0};
-		glDrawBuffers (1, buffers);
-	}
-	RenderScene(mDefaultProgram, mCamera);
 
-	if (mSettings->DrawDepth) {
-		mRenderTarget.RenderToLinearizedDepth(mCamera.mNear, mCamera.mFar, mCamera.mIsOrthographic);
-	}
-
-	if (mIsSSAOEnabled) {
 		mSSAOTarget.Bind();
 		glViewport(0, 0, mCamera.mWidth, mCamera.mHeight);
 		GLenum draw_attachment_0[] = {GL_COLOR_ATTACHMENT0 };
@@ -556,7 +613,7 @@ void Renderer::RenderGl() {
 		glActiveTexture(GL_TEXTURE1);
 		glBindTexture(GL_TEXTURE_2D, mRenderTarget.mNormalTexture);
 
-		// TODO: noise texture
+		// Noise
 		glActiveTexture(GL_TEXTURE2);
 		glBindTexture(GL_TEXTURE_2D, mSSAONoiseTexture);
 
@@ -572,9 +629,74 @@ void Renderer::RenderGl() {
 		mSSAOProgram.SetMat44("uProjection", mCamera.mProjectionMatrix);
 
 		mSSAOProgram.SetVec3Array("uSamples", mSSAOKernel.size(), &mSSAOKernel[0][0]);
-//		for (int i = 0; i < mSSAOKernel.size(); ++i) {
+
-//			mSSAOProgram.SetVec3(std::string("uSamples[" + std::to_string(i) + "]").c_str(), mSSAOKernel[i]);
+		gVertexArray.Bind();
-//		}
+		gScreenQuad.Draw(GL_TRIANGLES);
+
+		// Blur pass
+		mPostprocessTarget.Bind();
+		glViewport(0, 0, mCamera.mWidth, mCamera.mHeight);
+		glDrawBuffers(1, draw_attachment_0);
+		glClear(GL_COLOR_BUFFER_BIT);
+		glDisable(GL_DEPTH_TEST);
+		
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, mRenderTarget.mColorTexture);
+
+		glActiveTexture(GL_TEXTURE1);
+		glBindTexture(GL_TEXTURE_2D, mSSAOTarget.mColorTexture);
+
+		glUseProgram(mBlurSSAOProgram.mProgramId);
+		mBlurSSAOProgram.SetInt("uColor", 0);
+		mBlurSSAOProgram.SetInt("uAmbientOcclusion", 1);
+		mBlurSSAOProgram.SetInt("uBlurSize", mSSAOBlurSize);
+		mBlurSSAOProgram.SetInt("uDisableColor", mSSAODisableColor);
+
+		gScreenQuad.Draw(GL_TRIANGLES);
+	}
+
+	if (mUseDeferred) {
+		GLenum buffers[] = { GL_COLOR_ATTACHMENT0};
+		glDrawBuffers (1, buffers);
+
+		mDeferredLightingTarget.Bind();
+		glClear(GL_COLOR_BUFFER_BIT);
+	
+		glUseProgram(mDeferredLighting.mProgramId);
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, mRenderTarget.mColorTexture);
+		mDeferredLighting.SetInt("uColorTexture", 0);
+
+		glActiveTexture(GL_TEXTURE1);
+		glBindTexture(GL_TEXTURE_2D, mRenderTarget.mNormalTexture);
+		mDeferredLighting.SetInt("uNormal", 1);
+
+		glActiveTexture(GL_TEXTURE2);
+		glBindTexture(GL_TEXTURE_2D, mRenderTarget.mDepthTexture);
+		mDeferredLighting.SetInt("uDepth", 2);
+
+		glActiveTexture(GL_TEXTURE3);
+		glBindTexture(GL_TEXTURE_2D, mLight.mShadowMapTarget.mDepthTexture);
+		mDeferredLighting.SetInt("uDepth", 3);
+		mDeferredLighting.SetMat44("uLightSpaceMatrix", mLight.mLightSpaceMatrix);
+
+		// TODO: remove and reconstruct position from depth
+		glActiveTexture(GL_TEXTURE4);
+		glBindTexture(GL_TEXTURE_2D, mRenderTarget.mPositionTexture);
+		mDeferredLighting.SetInt("uPosition", 4);
+
+		mDeferredLighting.SetMat44("uViewMatrix", mCamera.mViewMatrix);
+		Matrix33f view_mat_rot = mCamera.mViewMatrix.block<3,3>(0,0);
+		view_mat_rot = view_mat_rot.transpose();
+		Vector3f light_direction = view_mat_rot * mLight.mDirection.normalized();
+		
+//		gLog ("Light direction %3.4f, %3.4f, %3.4f", 
+//				light_direction[0],
+//				light_direction[1],
+//				light_direction[2]);
+
+		mDeferredLighting.SetVec3("uLightDirection", light_direction);
+		mDeferredLighting.SetVec3("uViewPosition", mCamera.mEye);
 
 		gVertexArray.Bind();
 		gScreenQuad.Draw(GL_TRIANGLES);
@@ -596,6 +718,13 @@ void Renderer::RenderScene(RenderProgram &program, const Camera& camera) {
 	program.SetMat33("uNormalMatrix", normal_matrix);
 
   program.SetVec4("uColor", Vector4f (1.0f, 1.0f, 1.0f, 1.0f));
+	Vector3f light_dir = (camera.mViewMatrix * Vector4f (
+			mLight.mDirection[0],
+			mLight.mDirection[1],
+			mLight.mDirection[2],
+			1.0f
+			)).block<3,1>(0,0);
+//	program.SetVec3("uLightDirection", light_dir.normalize());
 	program.SetVec3("uLightDirection", mLight.mDirection);
 	program.SetVec3("uViewPosition", camera.mEye);
 	
@@ -614,7 +743,7 @@ void Renderer::RenderScene(RenderProgram &program, const Camera& camera) {
 	program.SetMat44("uModelMatrix", 
 			RotateMat44(sin(0.3 * gTimer->mCurrentTime) * 180.0f,
 				0.0f, 1.0f, 0.0f)
-			* TranslateMat44(3.0, 1.0 + sin(2.0f * gTimer->mCurrentTime), 0.0)) ;
+			* TranslateMat44(5.0, 1.0 + sin(2.0f * gTimer->mCurrentTime), 0.0)) ;
 	program.SetVec4("uColor", Vector4f (1.0f, 1.0f, 1.0f, 1.0f));
 	gUnitCubeMesh.Draw(GL_TRIANGLES);
 
@@ -634,7 +763,7 @@ void Renderer::RenderScene(RenderProgram &program, const Camera& camera) {
 	
 	program.SetMat44("uModelMatrix", 
 			RotateMat44(200.0f, 0.0f, 1.0f, 0.0f)
-			* TranslateMat44(moving_factor * sin(gTimer->mCurrentTime), 1.0f, 0.0f)
+			* TranslateMat44(moving_factor * sin(gTimer->mCurrentTime), 1.0f, -3.0f)
 			* ScaleMat44(0.5f, 0.5f, 0.5f));
 	
 	program.SetVec4("uColor", Vector4f (1.0f, 1.0f, 1.0f, 1.0f));
@@ -650,35 +779,37 @@ void Renderer::RenderScene(RenderProgram &program, const Camera& camera) {
 
 void Renderer::DrawGui() {
 	if (ImGui::BeginDock("Scene")) {
-		static int e = 0;
+		ImGui::RadioButton("Default", &sRendererSettings.RenderMode, 0); ImGui::SameLine();
-		if (mSettings->DrawDepth) {
+		ImGui::RadioButton("Color", &sRendererSettings.RenderMode, 1); ImGui::SameLine();
-			e = 1;
+		ImGui::RadioButton("Depth", &sRendererSettings.RenderMode, 2); ImGui::SameLine();
-		} else if (mSettings->DrawSSAO) {
+		ImGui::RadioButton("Normals", &sRendererSettings.RenderMode, 3); ImGui::SameLine();
-			e = 2;
+		ImGui::RadioButton("Positions", &sRendererSettings.RenderMode, 4); 
-		}
 		
-		ImGui::RadioButton("Default", &e, 0); ImGui::SameLine();
+		if (mIsSSAOEnabled) {
-		ImGui::RadioButton("Depth", &e, 1); ImGui::SameLine();
+			ImGui::SameLine();
-		ImGui::RadioButton("SSAO", &e, 2);
+			ImGui::RadioButton("AO", &sRendererSettings.RenderMode, 5);
+		};
 
-		switch (e) {
+		switch (sRendererSettings.RenderMode) {
-			case 0: 			mSettings->DrawDepth = 0;
+			case SceneRenderModeDefault:	
-										mSettings->DrawSSAO = 0;
+				mRenderTextureRef.mTextureIdPtr =
+					mUseDeferred ? &mDeferredLightingTarget.mColorTexture : &mPostprocessTarget.mColorTexture;
 				break;
-			case 1: 			mSettings->DrawDepth = 1;
+			case SceneRenderModeColor:	
-										mSettings->DrawSSAO = 0;
-										break;
-			case 2: 			mSettings->DrawDepth = 0;
-										mSettings->DrawSSAO = 1;
-										break;
-		}
-
-		if (mSettings->DrawDepth) {
-			mRenderTextureRef.mTextureIdPtr = &mRenderTarget.mLinearizedDepthTexture;
-		} else if (mSettings->DrawSSAO) {
-			mRenderTextureRef.mTextureIdPtr = &mSSAOTarget.mColorTexture;
-		} else {
 				mRenderTextureRef.mTextureIdPtr = &mRenderTarget.mColorTexture;
+				break;
+			case SceneRenderModeDepth:	
+				mRenderTextureRef.mTextureIdPtr = &mRenderTarget.mLinearizedDepthTexture;
+				break;
+			case SceneRenderModeNormals:	
+				mRenderTextureRef.mTextureIdPtr = &mRenderTarget.mNormalTexture;
+				break;
+			case SceneRenderModePositions:	
+				mRenderTextureRef.mTextureIdPtr = &mRenderTarget.mPositionTexture;
+				break;
+			case SceneRenderModeAmbientOcclusion:	
+				mRenderTextureRef.mTextureIdPtr = &mSSAOTarget.mColorTexture;
+				break;
 		}
 
 		ImGui::Text("Scene");
@@ -705,12 +836,15 @@ void Renderer::DrawGui() {
 		ImGui::Text("Camera");
 		mCamera.DrawGui();
 
+		ImGui::Checkbox("Enable Deferred", &mUseDeferred);
 		ImGui::Checkbox("Enable SSAO", &mIsSSAOEnabled);
 
 		if (mIsSSAOEnabled) {
 			ImGui::SliderFloat("Radius", &mSSAORadius, 0.0f, 1.0f);
 			ImGui::SliderFloat("Bias", &mSSAOBias, 0.0f, 0.1f);
 			ImGui::SliderInt("Samples", &mSSAOKernelSize, 1, 64);
+			ImGui::SliderInt("Blur Size", &mSSAOBlurSize, 0, 8);
+			ImGui::Checkbox("Disable Color", &mSSAODisableColor);
 
 			if (mSSAOKernelSize != mSSAOKernel.size()) {
 				InitializeSSAOKernelAndNoise();

src/modules/RenderModule.h

@@ -56,6 +56,7 @@ struct Renderer {
 
 	bool mInitialized = false;
 	bool mIsSSAOEnabled = false;
+	bool mUseDeferred = false;
 
 	uint32_t mWidth = 1;
 	uint32_t mHeight = 1;
@@ -68,13 +69,18 @@ struct Renderer {
 	Texture mDefaultTexture;
 
 	RenderProgram mSimpleProgram;
+	RenderProgram mDeferredGeometry;
+	RenderProgram mDeferredLighting;
 	RenderProgram mDefaultProgram;
 	RenderProgram mRenderQuadProgramColor;
 	RenderProgram mRenderQuadProgramDepth;
 	RenderProgram mSSAOProgram;
+	RenderProgram mBlurSSAOProgram;
 
 	RenderTarget mRenderTarget;
+	RenderTarget mDeferredLightingTarget;
 	RenderTarget mSSAOTarget;
+	RenderTarget mPostprocessTarget;
 
 	GLTextureRef mRenderTextureRef = { (int)0xbadface };
 	GLTextureRef mPositionTextureRef = { (int)0xbadface };
@@ -85,6 +91,8 @@ struct Renderer {
 	int mSSAOKernelSize = 64;
 	std::vector<Vector3f> mSSAOKernel;
 	GLuint mSSAONoiseTexture = -1;
+	int mSSAOBlurSize = 1;
+	bool mSSAODisableColor = false;
 
 	Renderer() :
 		mInitialized(false),

src/modules/RenderUtils.cc

@@ -154,8 +154,8 @@ GLuint RenderProgram::LinkProgram(GLuint vertex_shader, GLuint fragment_shader)
 	glBindAttribLocation(ProgramID, 3, "inColor");
 
 	glBindFragDataLocation(ProgramID, 0, "outColor");
-	glBindFragDataLocation(ProgramID, 1, "outPosition");
+	glBindFragDataLocation(ProgramID, 1, "outNormal");
-	glBindFragDataLocation(ProgramID, 2, "outNormal");
+	glBindFragDataLocation(ProgramID, 2, "outPosition");
 
 	glLinkProgram(ProgramID);
 
@@ -404,7 +404,7 @@ void RenderTarget::Resize(int width, int height, int flags) {
 			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 
-			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, mLinearizedDepthTexture, 0);
+			glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT4, GL_TEXTURE_2D, mLinearizedDepthTexture, 0);
 		}
 	} else if (mFlags & EnableDepth) {
 		assert((mFlags & EnableDepthTexture) == false);
@@ -414,6 +414,19 @@ void RenderTarget::Resize(int width, int height, int flags) {
 		glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepthBuffer);
 	}
 
+	if (mFlags & EnableNormalTexture) {
+		glGenTextures(1, &mNormalTexture);
+		glBindTexture(GL_TEXTURE_2D, mNormalTexture);
+
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, mWidth, mHeight, 0, GL_RGB, GL_FLOAT, NULL);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, mNormalTexture, 0);
+	}
+
 	if (mFlags & EnablePositionTexture) {
 		glGenTextures(1, &mPositionTexture);
 		glBindTexture(GL_TEXTURE_2D, mPositionTexture);
@@ -427,19 +440,6 @@ void RenderTarget::Resize(int width, int height, int flags) {
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, mPositionTexture, 0);
 	}
 
-	if (mFlags & EnableNormalTexture) {
-		glGenTextures(1, &mNormalTexture);
-		glBindTexture(GL_TEXTURE_2D, mNormalTexture);
-
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, mWidth, mHeight, 0, GL_RGB, GL_FLOAT, NULL);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
-		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, mNormalTexture, 0);
-	}
-
 	GLenum result = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 	if (result != GL_FRAMEBUFFER_COMPLETE) {
 		switch (result) {
@@ -463,7 +463,7 @@ void RenderTarget::RenderToLinearizedDepth(const float& near, const float& far,
 	assert(mQuadMesh != nullptr);
 
 	glBindFramebuffer(GL_FRAMEBUFFER, mFrameBufferId);
-	GLenum draw_attachment_1[] = { GL_COLOR_ATTACHMENT1 };
+	GLenum draw_attachment_1[] = { GL_COLOR_ATTACHMENT4 };
 	glDrawBuffers(1, draw_attachment_1);
 
 	glClear(GL_COLOR_BUFFER_BIT);

src/modules/RenderUtils.h

@@ -151,8 +151,8 @@ struct Camera {
 	Matrix44f mViewMatrix;
 
 	Camera() :
-		mEye {5.f, 4.f, 5.f},
+		mEye {-4.f, 4.4f, 0.f},
-		mPoi {0.f, 2.f, 0.f},
+		mPoi {-3.2f, 3.8f, 0.2f},
 		mUp  {0.f, 1.f, 0.f},
 		mNear (0.1f),
 		mFar (150.f),