Good looking blur, need some fixes, but framerates takes a huge hit.

include/Engine/Rendering/DrawBloomPass.h

@@ -8,6 +8,7 @@
 #include "ShaderProgram.h"
 //#include "Util/UnorderedMapVec2.h"
 #include "Texture.h"
+#include "imgui/imgui.h"
 
 class DrawBloomPass
 {
@@ -26,27 +27,36 @@ public:
 
     //Getters
     //Return the blurred result of the texture that was sent into draw
-    GLuint GaussianTexture() const { return m_GaussianTexture_vert; }
+    GLuint GaussianTexture() const { return m_FinalBlurTexture; }
 
 
 private:
     void GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type) const;
+    void BlurOneMipMapLevel(GLuint* texture, GLint iterations, GLint mipMapLevel);
 
     Texture* m_WhiteTexture;
     Model* m_ScreenQuad;
 
     const IRenderer* m_Renderer;
     //const LightCullingPass* m_LightCullingPass 
-    GLuint m_iterations = 9;
+    //GLuint m_iterations = 5;
+    GLint m_DebugTextureToDraw = 0;
+    GLint m_Iterations = 3;
 
+    float m_ScreenSizes[10];
+
+    GLuint m_FinalBlurTexture;
     GLuint m_GaussianTexture_horiz;
     GLuint m_GaussianTexture_vert;
 
     FrameBuffer m_GaussianFrameBuffer_horiz;
     FrameBuffer m_GaussianFrameBuffer_vert;
+    FrameBuffer m_BlurredFinalTexture;
 
     ShaderProgram* m_GaussianProgram_horiz;
     ShaderProgram* m_GaussianProgram_vert;
+    ShaderProgram* m_GaussianProgram_both;
+    ShaderProgram* m_CombineProgram;
 
 };
 

resources/Shaders/Gaussian_both.frag.glsl

@@ -0,0 +1,36 @@
+#version 430
+#extension GL_EXT_gpu_shader4 : enable
+
+uniform int MipMapLevel;
+uniform bool Horizontal;
+uniform vec2 ScreenSize[5];
+
+layout (binding = 0) uniform sampler2D Texture;
+
+in VertexData{
+	vec2 TextureCoordinate;
+}Input;
+
+out vec4 fragmentColor;
+
+uniform float offset[3] = float[]( 0.0, 1.3846153846, 3.2307692308 );
+uniform float weight[5] = float[]( 0.2270270270, 0.1945945946, 0.1216216216, 0.0540540541, 0.0162162162 );
+
+void main()
+{
+	//vec2 tex_offset = 1.0 / textureSize2D(Texture, 0);
+	vec3 result = textureLod(Texture, vec2(gl_FragCoord)/ScreenSize[0], MipMapLevel ).rgb * weight[0];
+
+	if(Horizontal) {
+		for( int i = 1; i<3; i++) {
+			result += textureLod( Texture, Input.TextureCoordinate + vec2(offset[i], 0.0), MipMapLevel ).rgb * weight[i];
+			result += textureLod( Texture, Input.TextureCoordinate - vec2(offset[i], 0.0), MipMapLevel ).rgb * weight[i];
+		}
+	} else {
+		for( int i = 1; i<3; i++) {
+			result += textureLod( Texture, Input.TextureCoordinate + vec2(0.0, offset[i]), MipMapLevel ).rgb * weight[i];
+			result += textureLod( Texture, Input.TextureCoordinate - vec2(0.0, offset[i]), MipMapLevel ).rgb * weight[i];
+		}
+	}
+	fragmentColor = vec4(result, 1.0);
+}

resources/Shaders/Gaussian_both.vert.glsl

@@ -0,0 +1,13 @@
+#version 430
+
+layout (location = 0) in vec3 Position;
+
+out VertexData{
+	vec2 TextureCoordinate;
+}Output;
+
+void main()
+{
+	gl_Position = vec4(Position, 1.0);
+	Output.TextureCoordinate = (vec2(Position) + 1) / 2;
+}

resources/Shaders/Gaussian_horiz.frag.glsl

@@ -1,6 +1,7 @@
 #version 430
 #extension GL_EXT_gpu_shader4 : enable
 
+uniform int MipMapLevel;
 layout (binding = 0) uniform sampler2D Texture;
 
 in VertexData{
@@ -14,11 +15,14 @@ uniform float weight[5] = float[](0.227027, 0.1945946, 0.1216216, 0.054054, 0.01
 void main()
 {
 	vec2 tex_offset = 1.0 / textureSize2D(Texture, 0);
-	vec3 result = texture(Texture, Input.TextureCoordinate).rgb * weight[0];
+	vec3 result = textureLod(Texture, Input.TextureCoordinate, MipMapLevel).rgb * weight[0];
+	//vec3 result = texture(Texture, Input.TextureCoordinate).rgb * weight[0];
 
 	for(int i = 1; i < 5; ++i) {
-	    result += texture(Texture, Input.TextureCoordinate + vec2(tex_offset.x * i, 0.0)).rgb * weight[i];
+	    result += textureLod(Texture, Input.TextureCoordinate + vec2(tex_offset.x * i, 0.0), MipMapLevel).rgb * weight[i];
-	    result += texture(Texture, Input.TextureCoordinate - vec2(tex_offset.x * i, 0.0)).rgb * weight[i];
+	    result += textureLod(Texture, Input.TextureCoordinate - vec2(tex_offset.x * i, 0.0), MipMapLevel).rgb * weight[i];
+	    //result += texture(Texture, Input.TextureCoordinate + vec2(tex_offset.x * i, 0.0)).rgb * weight[i];
+	    //result += texture(Texture, Input.TextureCoordinate - vec2(tex_offset.x * i, 0.0)).rgb * weight[i];
 	}
 	fragmentColor = vec4(result, 1.0);
 }

resources/Shaders/Gaussian_vert.frag.glsl

@@ -1,6 +1,7 @@
 #version 430
 #extension GL_EXT_gpu_shader4 : enable
 
+uniform int MipMapLevel;
 layout (binding = 0) uniform sampler2D Texture;
 
 in VertexData{
@@ -14,11 +15,14 @@ uniform float weight[5] = float[](0.227027, 0.1945946, 0.1216216, 0.054054, 0.01
 void main()
 {
 	vec2 tex_offset = 1.0 / textureSize2D(Texture, 0);
-	vec3 result = texture(Texture, Input.TextureCoordinate).rgb * weight[0];
+	//vec3 result = texture(Texture, Input.TextureCoordinate).rgb * weight[0];
+	vec3 result = textureLod(Texture, Input.TextureCoordinate, MipMapLevel).rgb * weight[0];
 
     for(int i = 1; i < 5; ++i) {
-        result += texture(Texture, Input.TextureCoordinate + vec2(0.0, tex_offset.y * i)).rgb * weight[i];
+        result += textureLod(Texture, Input.TextureCoordinate + vec2(0.0, tex_offset.y * i), MipMapLevel).rgb * weight[i];
-        result += texture(Texture, Input.TextureCoordinate - vec2(0.0, tex_offset.y * i)).rgb * weight[i];
+        result += textureLod(Texture, Input.TextureCoordinate - vec2(0.0, tex_offset.y * i), MipMapLevel).rgb * weight[i];
+        //result += texture(Texture, Input.TextureCoordinate + vec2(0.0, tex_offset.y * i)).rgb * weight[i];
+        //result += texture(Texture, Input.TextureCoordinate - vec2(0.0, tex_offset.y * i)).rgb * weight[i];
     }
     fragmentColor = vec4(result, 1.0);
 }

resources/Shaders/TextureCombine.frag.glsl

@@ -0,0 +1,21 @@
+#version 430
+
+layout (binding = 0) uniform sampler2D Texture0;
+layout (binding = 1) uniform sampler2D Texture1;
+
+in VertexData{
+	vec2 TextureCoordinate;
+}Input;
+
+out vec4 fragmentColor;
+
+void main()
+{
+	vec4 texel0 = texture(Texture0, Input.TextureCoordinate);
+	vec4 texel1 = texture(Texture1, Input.TextureCoordinate);
+
+	fragmentColor = texel0 + texel1;
+	//fragmentColor = vec4(1,0.5,0.7,1);
+}
+
+

resources/Shaders/TextureCombine.vert.glsl

@@ -0,0 +1,13 @@
+#version 430
+
+layout (location = 0) in vec3 Position;
+
+out VertexData{
+	vec2 TextureCoordinate;
+}Output;
+
+void main()
+{
+	gl_Position = vec4(Position, 1.0);
+	Output.TextureCoordinate = (vec2(Position) + 1) / 2;
+}

src/Engine/Rendering/DrawBloomPass.cpp

@@ -6,6 +6,18 @@ DrawBloomPass::DrawBloomPass(IRenderer* renderer)
 
     m_ScreenQuad = ResourceManager::Load<Model>("Models/Core/ScreenQuad.mesh");
 
+    m_ScreenSizes[0] = 1920.f;
+    m_ScreenSizes[1] = 1053.f;
+    m_ScreenSizes[2] = 959.f;
+    m_ScreenSizes[3] = 525.f;
+    m_ScreenSizes[4] = 479.f;
+    m_ScreenSizes[5] = 262.f;
+    m_ScreenSizes[6] = 239.f;
+    m_ScreenSizes[7] = 130.f;
+    m_ScreenSizes[8] = 119.f;
+    m_ScreenSizes[9] = 64.f;
+
+
     InitializeTextures();
     InitializeBuffers();
     InitializeShaderPrograms();
@@ -18,31 +30,51 @@ void DrawBloomPass::InitializeTextures()
 
 void DrawBloomPass::InitializeShaderPrograms()
 {
-    m_GaussianProgram_horiz = ResourceManager::Load<ShaderProgram>("##GaussianProgramHoriz");
+    m_GaussianProgram_horiz = ResourceManager::Load<ShaderProgram>("#GaussianProgramHoriz");
     m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_horiz.vert.glsl")));
     m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_horiz.frag.glsl")));
     m_GaussianProgram_horiz->Compile();
     m_GaussianProgram_horiz->Link();
 
-    m_GaussianProgram_vert = ResourceManager::Load<ShaderProgram>("##GaussianProgramVert");
+    m_GaussianProgram_vert = ResourceManager::Load<ShaderProgram>("#GaussianProgramVert");
     m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_vert.vert.glsl")));
     m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_vert.frag.glsl")));
     m_GaussianProgram_vert->Compile();
     m_GaussianProgram_vert->Link();
+
+    m_GaussianProgram_both = ResourceManager::Load<ShaderProgram>("#GaussianProgramBoth");
+    m_GaussianProgram_both->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_both.vert.glsl")));
+    m_GaussianProgram_both->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_both.frag.glsl")));
+    m_GaussianProgram_both->Compile();
+    m_GaussianProgram_both->Link();
+
+    m_CombineProgram = ResourceManager::Load<ShaderProgram>("#CombineProgram");
+    m_CombineProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/TextureCombine.vert.glsl")));
+    m_CombineProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/TextureCombine.frag.glsl")));
+    m_CombineProgram->Compile();
+    m_CombineProgram->Link();
+
+    //Fixa nya combine shadern
 }
 
 
 void DrawBloomPass::InitializeBuffers()
 {
-    GenerateTexture(&m_GaussianTexture_horiz, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_FLOAT);
+    GenerateTexture(&m_GaussianTexture_horiz, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_HALF_FLOAT);
 
     m_GaussianFrameBuffer_horiz.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_horiz, GL_COLOR_ATTACHMENT0)));
     m_GaussianFrameBuffer_horiz.Generate();
 
-    GenerateTexture(&m_GaussianTexture_vert, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_FLOAT);
+    GenerateTexture(&m_GaussianTexture_vert, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_HALF_FLOAT);
 
     m_GaussianFrameBuffer_vert.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_vert, GL_COLOR_ATTACHMENT0)));
     m_GaussianFrameBuffer_vert.Generate();
+
+    GenerateTexture(&m_FinalBlurTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_RGB16F, GL_RGB, GL_FLOAT);
+
+    m_BlurredFinalTexture.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_FinalBlurTexture, GL_COLOR_ATTACHMENT0)));
+    m_BlurredFinalTexture.Generate();
+
 }
 
 
@@ -60,65 +92,123 @@ void DrawBloomPass::ClearBuffer()
 
 void DrawBloomPass::Draw(GLuint texture)
 {
-    GLERROR("DrawBloomPass::Draw: Pre");
 
+    
+    ImGui::Combo("DebugBloom", &m_DebugTextureToDraw, "ALL\0First\0SEcond\0Third\0Fourth\0Fifth");
+    ImGui::SliderInt("Iterations", &m_Iterations, 0, 10);
+
+    if (m_DebugTextureToDraw == 1)
+        BlurOneMipMapLevel(&texture, m_Iterations, 0);
+    else if (m_DebugTextureToDraw == 2)
+        BlurOneMipMapLevel(&texture, m_Iterations, 1);
+    else if (m_DebugTextureToDraw == 3)
+        BlurOneMipMapLevel(&texture, m_Iterations, 2);
+    else if (m_DebugTextureToDraw == 4)
+        BlurOneMipMapLevel(&texture, m_Iterations, 3);
+    else if (m_DebugTextureToDraw == 0) {
+        BlurOneMipMapLevel(&texture, m_Iterations, 0);
+        BlurOneMipMapLevel(&texture, m_Iterations, 1);
+        BlurOneMipMapLevel(&texture, m_Iterations, 2);
+        BlurOneMipMapLevel(&texture, m_Iterations, 3);
+    }
+
+}
+
+void DrawBloomPass::BlurOneMipMapLevel(GLuint* texture, GLint iterations, GLint mipMapLevel)
+{
+    GLERROR("PRE");
+
+    //new code
     DrawBloomPassState state;
-
+    //Loop through and blur texture at mipmap level
     GLuint shaderHandle_horiz = m_GaussianProgram_horiz->GetHandle();
     GLuint shaderHandle_vert = m_GaussianProgram_vert->GetHandle();
 
 
-    //Horizontal pass, first use the given texture then save it to the horizontal framebuffer.
+    //First horiz pass
     m_GaussianFrameBuffer_horiz.Bind();
     m_GaussianProgram_horiz->Bind();
+    GLERROR("Bind");
+
+
+    glUniform1i(glGetUniformLocation(shaderHandle_horiz, "MipMapLevel"), mipMapLevel);
+    //glUniform2fv(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "ScreenSize"), 5, m_ScreenSizes);
+    //glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), true);
+    GLERROR("1");
 
     glActiveTexture(GL_TEXTURE0);
-    glBindTexture(GL_TEXTURE_2D, texture);
+    glBindTexture(GL_TEXTURE_2D, *texture);
+
 
     glBindVertexArray(m_ScreenQuad->VAO);
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
     glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
         , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
+    GLERROR("2");
 
-    //Iterate some times to make it more gaussian.
+
-    for (int i = 1; i < m_iterations; i++) {
+    //Loop through vert, then horiz and save to respective textures X number of times.
+    for (int i = 1; i < iterations; i++) {
         //Vertical pass
         m_GaussianFrameBuffer_vert.Bind();
         m_GaussianProgram_vert->Bind();
 
+        //glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), false);
+
         glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
 
         glBindVertexArray(m_ScreenQuad->VAO);
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
         glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
             , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
+        GLERROR("3");
 
         //horizontal pass
 
         m_GaussianFrameBuffer_horiz.Bind();
         m_GaussianProgram_horiz->Bind();
 
+        //glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), true);
+
         glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_vert);
 
         glBindVertexArray(m_ScreenQuad->VAO);
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
         glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
             , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
+        GLERROR("4");
+
     }
 
-    //final vertical gaussian after the iterations are done
+    //the final vertical iteration.
-
     m_GaussianFrameBuffer_vert.Bind();
     m_GaussianProgram_vert->Bind();
 
+    //glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), false);
+
     glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
 
     glBindVertexArray(m_ScreenQuad->VAO);
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
     glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
         , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
+    GLERROR("5");
 
-    GLERROR("DrawBloomPass::Draw: END");
+    //Combine the the new blurred texture into the final texture
+    m_BlurredFinalTexture.Bind();
+    m_CombineProgram->Bind();
+
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, m_FinalBlurTexture);
+    glActiveTexture(GL_TEXTURE1);
+    glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_vert);
+
+    glBindVertexArray(m_ScreenQuad->VAO);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
+    glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
+        , GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
+
+    GLERROR("END");
 }
 
 void DrawBloomPass::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type) const
@@ -132,3 +222,5 @@ void DrawBloomPass::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum fil
     glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, dimensions.x, dimensions.y, 0, format, type, nullptr);//TODO: Renderer: Fix the precision and Resolution
     GLERROR("Texture initialization failed");
 }
+
+

src/Engine/Rendering/DrawFinalPass.cpp

@@ -216,11 +216,11 @@ void DrawFinalPass::GenerateMipMapTexture(GLuint* texture, GLenum wrapping, glm:
 
     glGenTextures(1, texture);
     glBindTexture(GL_TEXTURE_2D, *texture);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dimensions.x, dimensions.y, 0, format, type, nullptr);//TODO: Renderer: Fix the precision and Resolution
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapping);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapping);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); //TODO: THIS SHIS IS BROKEN WHY YOU NO LINEAR MIPMAP? SHITTY FUCK
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //TODO: THIS SHIS IS BROKEN WHY YOU NO LINEAR MIPMAP? SHITTY FUCK
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, dimensions.x, dimensions.y, 0, format, type, nullptr);//TODO: Renderer: Fix the precision and Resolution
     glGenerateMipmap(GL_TEXTURE_2D);
     GLERROR("MipMap Texture initialization failed");
 
@@ -324,6 +324,9 @@ void DrawFinalPass::DrawModelRenderQueues(std::list<std::shared_ptr<RenderJob>>&
             }
         }
     }
+    glActiveTexture(GL_TEXTURE1);
+    glBindTexture(GL_TEXTURE_2D, m_BloomTexture);
+    glGenerateMipmap(GL_TEXTURE_2D);
 
 }