Tleety
227 lines
9.2 KiB
C++
227 lines
9.2 KiB
C++
#include "Rendering/DrawBloomPass.h"
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DrawBloomPass::DrawBloomPass(IRenderer* renderer)
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{
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m_Renderer = renderer;
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m_ScreenQuad = ResourceManager::Load<Model>("Models/Core/ScreenQuad.mesh");
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m_ScreenSizes[0] = 1920.f;
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m_ScreenSizes[1] = 1053.f;
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m_ScreenSizes[2] = 959.f;
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m_ScreenSizes[3] = 525.f;
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m_ScreenSizes[4] = 479.f;
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m_ScreenSizes[5] = 262.f;
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m_ScreenSizes[6] = 239.f;
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m_ScreenSizes[7] = 130.f;
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m_ScreenSizes[8] = 119.f;
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m_ScreenSizes[9] = 64.f;
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InitializeTextures();
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InitializeBuffers();
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InitializeShaderPrograms();
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}
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void DrawBloomPass::InitializeTextures()
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{
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m_WhiteTexture = ResourceManager::Load<Texture>("Textures/Core/White.png");
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}
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void DrawBloomPass::InitializeShaderPrograms()
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{
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m_GaussianProgram_horiz = ResourceManager::Load<ShaderProgram>("#GaussianProgramHoriz");
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m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_horiz.vert.glsl")));
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m_GaussianProgram_horiz->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_horiz.frag.glsl")));
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m_GaussianProgram_horiz->Compile();
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m_GaussianProgram_horiz->Link();
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m_GaussianProgram_vert = ResourceManager::Load<ShaderProgram>("#GaussianProgramVert");
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m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_vert.vert.glsl")));
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m_GaussianProgram_vert->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_vert.frag.glsl")));
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m_GaussianProgram_vert->Compile();
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m_GaussianProgram_vert->Link();
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m_GaussianProgram_both = ResourceManager::Load<ShaderProgram>("#GaussianProgramBoth");
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m_GaussianProgram_both->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/Gaussian_both.vert.glsl")));
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m_GaussianProgram_both->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/Gaussian_both.frag.glsl")));
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m_GaussianProgram_both->Compile();
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m_GaussianProgram_both->Link();
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m_CombineProgram = ResourceManager::Load<ShaderProgram>("#CombineProgram");
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m_CombineProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/TextureCombine.vert.glsl")));
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m_CombineProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/TextureCombine.frag.glsl")));
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m_CombineProgram->Compile();
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m_CombineProgram->Link();
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//Fixa nya combine shadern
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}
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void DrawBloomPass::InitializeBuffers()
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{
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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);
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m_GaussianFrameBuffer_horiz.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_horiz, GL_COLOR_ATTACHMENT0)));
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m_GaussianFrameBuffer_horiz.Generate();
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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);
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m_GaussianFrameBuffer_vert.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_vert, GL_COLOR_ATTACHMENT0)));
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m_GaussianFrameBuffer_vert.Generate();
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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);
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m_BlurredFinalTexture.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_FinalBlurTexture, GL_COLOR_ATTACHMENT0)));
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m_BlurredFinalTexture.Generate();
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}
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void DrawBloomPass::ClearBuffer()
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{
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m_GaussianFrameBuffer_horiz.Bind();
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glClearColor(0.f, 0.f, 0.f, 0.f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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m_GaussianFrameBuffer_horiz.Unbind();
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m_GaussianFrameBuffer_vert.Bind();
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glClearColor(0.f, 0.f, 0.f, 0.f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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m_GaussianFrameBuffer_vert.Unbind();
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}
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void DrawBloomPass::Draw(GLuint texture)
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{
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ImGui::Combo("DebugBloom", &m_DebugTextureToDraw, "ALL\0First\0SEcond\0Third\0Fourth\0Fifth");
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ImGui::SliderInt("Iterations", &m_Iterations, 0, 10);
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if (m_DebugTextureToDraw == 1)
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BlurOneMipMapLevel(&texture, m_Iterations, 1);
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else if (m_DebugTextureToDraw == 2)
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BlurOneMipMapLevel(&texture, m_Iterations, 2);
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else if (m_DebugTextureToDraw == 3)
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BlurOneMipMapLevel(&texture, m_Iterations, 3);
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else if (m_DebugTextureToDraw == 4)
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BlurOneMipMapLevel(&texture, m_Iterations, 4);
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else if (m_DebugTextureToDraw == 0) {
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BlurOneMipMapLevel(&texture, m_Iterations, 1);
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BlurOneMipMapLevel(&texture, m_Iterations, 2);
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BlurOneMipMapLevel(&texture, m_Iterations, 3);
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BlurOneMipMapLevel(&texture, m_Iterations, 4);
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}
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}
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void DrawBloomPass::BlurOneMipMapLevel(GLuint* texture, GLint iterations, GLint mipMapLevel)
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{
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GLERROR("PRE");
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//new code
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DrawBloomPassState state;
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//Loop through and blur texture at mipmap level
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GLuint shaderHandle_horiz = m_GaussianProgram_horiz->GetHandle();
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GLuint shaderHandle_vert = m_GaussianProgram_vert->GetHandle();
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//First horiz pass
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m_GaussianFrameBuffer_horiz.Bind();
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m_GaussianProgram_horiz->Bind();
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GLERROR("Bind");
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glUniform1i(glGetUniformLocation(shaderHandle_horiz, "MipMapLevel"), mipMapLevel);
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//glUniform2fv(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "ScreenSize"), 5, m_ScreenSizes);
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//glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), true);
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GLERROR("1");
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, *texture);
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glBindVertexArray(m_ScreenQuad->VAO);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
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glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
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, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
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GLERROR("2");
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//Loop through vert, then horiz and save to respective textures X number of times.
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for (int i = 1; i < iterations; i++) {
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//Vertical pass
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m_GaussianFrameBuffer_vert.Bind();
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m_GaussianProgram_vert->Bind();
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//glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), false);
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glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
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glBindVertexArray(m_ScreenQuad->VAO);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
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glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
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, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
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GLERROR("3");
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//horizontal pass
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m_GaussianFrameBuffer_horiz.Bind();
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m_GaussianProgram_horiz->Bind();
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//glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), true);
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glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_vert);
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glBindVertexArray(m_ScreenQuad->VAO);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
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glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
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, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
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GLERROR("4");
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}
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//the final vertical iteration.
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m_GaussianFrameBuffer_vert.Bind();
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m_GaussianProgram_vert->Bind();
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//glUniform1i(glGetUniformLocation(m_GaussianProgram_both->GetHandle(), "Horizontal"), false);
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glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
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glBindVertexArray(m_ScreenQuad->VAO);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
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glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
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, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
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GLERROR("5");
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//Combine the the new blurred texture into the final texture
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m_BlurredFinalTexture.Bind();
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m_CombineProgram->Bind();
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, m_FinalBlurTexture);
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_vert);
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glBindVertexArray(m_ScreenQuad->VAO);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
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glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].EndIndex - m_ScreenQuad->MaterialGroups()[0].StartIndex +1
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, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].StartIndex);
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GLERROR("END");
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}
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void DrawBloomPass::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type) const
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{
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glGenTextures(1, texture);
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glBindTexture(GL_TEXTURE_2D, *texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapping);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapping);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filtering);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filtering);
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glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, dimensions.x, dimensions.y, 0, format, type, nullptr);//TODO: Renderer: Fix the precision and Resolution
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GLERROR("Texture initialization failed");
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}
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