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You can now change the quality of SSAO by sliding the SSAO Quality

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This commit is contained in:
Teejoon
2016-02-26 11:51:20 +01:00
parent 748a178801
commit f56705d921
16 changed files with 334 additions and 101 deletions
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src/Engine/Rendering/SSAOPass.cpp
+181 -29
View File
@@ -1,50 +1,134 @@
#include "Rendering/SSAOPass.h"
SSAOPass::SSAOPass(IRenderer* renderer)
SSAOPass::SSAOPass(IRenderer* renderer, ConfigFile* config)
: m_Renderer(renderer)
, m_Config(config)
{
m_Renderer = renderer;
m_WhiteTexture = CommonFunctions::LoadTexture("Textures/Core/White.png", false);
m_Quality = m_Config->Get<int>("SSAO.Quality", 0);
if (m_Quality == 0) {
return;
}
ChangeQuality(m_Quality);
}
void SSAOPass::ChangeQuality(int quality)
{
if (m_Quality == quality) {
return;
}
m_Quality = quality;
if (m_Quality == 0) {
glDeleteTextures(1, &m_SSAOTexture);
glDeleteTextures(1, &m_SSAOViewSpaceZTexture);
glDeleteTextures(1, &m_GaussianTexture_horiz);
glDeleteTextures(1, &m_GaussianTexture_vert);
return;
}
std::string qStr = std::to_string(m_Quality);
Setting(
m_Config->Get<float>("SSAO" + qStr + ".Radius", 0.01),
m_Config->Get<float>("SSAO" + qStr + ".Bias", 0.012),
m_Config->Get<float>("SSAO" + qStr + ".Contrast", 1.0),
m_Config->Get<float>("SSAO" + qStr + ".Intensity", 1.0),
m_Config->Get<int>("SSAO" + qStr + ".NumSamples", 0),
m_Config->Get<int>("SSAO" + qStr + ".NumTurns", 0),
m_Config->Get<int>("SSAO" + qStr + ".NumIterations", 0),
m_Config->Get<int>("SSAO" + qStr + ".TextureQuality", 4)
);
m_ScreenQuad = ResourceManager::Load<Model>("Models/Core/ScreenQuad.mesh");
InitializeTexture();
InitializeBuffer();
InitializeShaderProgram();
Setting(0.1f, 0.012f, 1.0f, 1.0f, 13, 7);
m_DrawBloomPass = new DrawBloomPass(renderer);
}
void SSAOPass::InitializeShaderProgram()
{
m_SSAOProgram = ResourceManager::Load<ShaderProgram>("##SSAOProgram");
m_SSAOProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/SSAO.vert.glsl")));
m_SSAOProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/SSAO.frag.glsl")));
m_SSAOProgram->Compile();
m_SSAOProgram->Link();
if (m_SSAOProgram->GetHandle() == 0) {
m_SSAOProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/SSAO.vert.glsl")));
m_SSAOProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/SSAO.frag.glsl")));
m_SSAOProgram->Compile();
m_SSAOProgram->Link();
}
m_SSAOViewSpaceZProgram = ResourceManager::Load<ShaderProgram>("##SSAOViewSpaceZProgram");
m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/SSAO.vert.glsl")));
m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/SSAOViewSpaceZ.frag.glsl")));
m_SSAOViewSpaceZProgram->Compile();
m_SSAOViewSpaceZProgram->Link();
if (m_SSAOViewSpaceZProgram->GetHandle() == 0) {
m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/SSAO.vert.glsl")));
m_SSAOViewSpaceZProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/SSAOViewSpaceZ.frag.glsl")));
m_SSAOViewSpaceZProgram->Compile();
m_SSAOViewSpaceZProgram->Link();
}
m_GaussianProgram_horiz = ResourceManager::Load<ShaderProgram>("##GaussianProgramHoriz");
if (m_GaussianProgram_horiz->GetHandle() == 0) {
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");
if (m_GaussianProgram_vert->GetHandle() == 0) {
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();
}
}
void SSAOPass::InitializeTexture() {
GenerateTexture(&m_SSAOTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_R8, GL_RED, GL_FLOAT);
GenerateTexture(&m_SSAOViewSpaceZTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height), GL_R32F, GL_RED, GL_FLOAT);
GenerateTexture(&m_SSAOTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width >> m_TextureQuality, m_Renderer->GetViewportSize().Height >> m_TextureQuality), GL_R8, GL_RED, GL_FLOAT);
GenerateTexture(&m_SSAOViewSpaceZTexture, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width >> m_TextureQuality, m_Renderer->GetViewportSize().Height >> m_TextureQuality), GL_R32F, GL_RED, GL_FLOAT);
GenerateTexture(&m_GaussianTexture_horiz, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width >> m_TextureQuality, m_Renderer->GetViewportSize().Height >> m_TextureQuality), GL_R8, GL_RGB, GL_FLOAT);
GenerateTexture(&m_GaussianTexture_vert, GL_CLAMP_TO_EDGE, GL_LINEAR, glm::vec2(m_Renderer->GetViewportSize().Width >> m_TextureQuality, m_Renderer->GetViewportSize().Height >> m_TextureQuality), GL_R8, GL_RGB, GL_FLOAT);
}
void SSAOPass::InitializeBuffer()
{
m_SSAOFramBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_SSAOTexture, GL_COLOR_ATTACHMENT0)));
m_SSAOFramBuffer.Generate();
if (m_SSAOFramBuffer.GetHandle() == 0) {
m_SSAOFramBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_SSAOTexture, GL_COLOR_ATTACHMENT0)));
}
m_SSAOFramBuffer.Generate();
if (m_SSAOViewSpaceZFramBuffer.GetHandle() == 0) {
m_SSAOViewSpaceZFramBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_SSAOViewSpaceZTexture, GL_COLOR_ATTACHMENT0)));
}
m_SSAOViewSpaceZFramBuffer.Generate();
if (m_GaussianFrameBuffer_horiz.GetHandle() == 0) {
m_GaussianFrameBuffer_horiz.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_horiz, GL_COLOR_ATTACHMENT0)));
}
m_GaussianFrameBuffer_horiz.Generate();
if (m_GaussianFrameBuffer_vert.GetHandle() == 0) {
m_GaussianFrameBuffer_vert.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_vert, GL_COLOR_ATTACHMENT0)));
}
m_GaussianFrameBuffer_vert.Generate();
m_SSAOViewSpaceZFramBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_SSAOViewSpaceZTexture, GL_COLOR_ATTACHMENT0)));
m_SSAOViewSpaceZFramBuffer.Generate();
}
void SSAOPass::ClearBuffer()
{
return;
m_SSAOFramBuffer.Bind();
glClearColor(1.f, 1.f, 1.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -54,19 +138,32 @@ void SSAOPass::ClearBuffer()
glClearColor(1.f, 1.f, 1.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_SSAOViewSpaceZFramBuffer.Unbind();
m_GaussianFrameBuffer_horiz.Bind();
glClearColor(1.f, 1.f, 1.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_GaussianFrameBuffer_horiz.Unbind();
m_GaussianFrameBuffer_vert.Bind();
glClearColor(1.f, 1.f, 1.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_GaussianFrameBuffer_vert.Unbind();
}
void SSAOPass::Setting(float radius, float bias, float contrast, float intensityScale, int numOfSamples, int NumOfTurns) {
void SSAOPass::Setting(float radius, float bias, float contrast, float intensityScale, int numOfSamples, int numOfTurns, int iterations, int quality) {
m_Radius = radius;
m_Bias = bias;
m_Contrast = contrast;
m_IntensityScale = intensityScale;
m_NumOfSamples = numOfSamples;
m_NumOfTurns = NumOfTurns;
m_NumOfTurns = numOfTurns;
m_Iterations = iterations;
m_TextureQuality = quality;
}
void SSAOPass::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filtering, glm::vec2 dimensions, GLint internalFormat, GLint format, GLenum type) const
{
glDeleteTextures(1, texture);
glGenTextures(1, texture);
glBindTexture(GL_TEXTURE_2D, *texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapping);
@@ -79,6 +176,10 @@ void SSAOPass::GenerateTexture(GLuint* texture, GLenum wrapping, GLenum filterin
void SSAOPass::Draw(GLuint depthBuffer, Camera* camera)
{
if (m_Quality == 0) {
return;
}
SSAOPassState state;
GLuint viewSpaceZPShaderHandle = m_SSAOViewSpaceZProgram->GetHandle();
GLuint SSAOShaderHandle = m_SSAOProgram->GetHandle();
@@ -98,6 +199,7 @@ void SSAOPass::Draw(GLuint depthBuffer, Camera* camera)
(-1.0f),
(+1.0f)
);*/
glViewport(0, 0, (m_Renderer->GetViewportSize().Width >> m_TextureQuality), (m_Renderer->GetViewportSize().Height >> m_TextureQuality)); //JOHAN TODO: Get this into state
glUniform3fv(glGetUniformLocation(viewSpaceZPShaderHandle, "ClipInfo"), 1, glm::value_ptr(clipInfo));
glBindVertexArray(m_ScreenQuad->VAO);
@@ -107,9 +209,9 @@ void SSAOPass::Draw(GLuint depthBuffer, Camera* camera)
glm::vec4 projInfo = glm::vec4(
((1.0 - camera->ProjectionMatrix()[0][2]) / camera->ProjectionMatrix()[0][0]),
(-2.0 / (m_Renderer->GetViewportSize().Width * camera->ProjectionMatrix()[0][0])),
(-2.0 / ((m_Renderer->GetViewportSize().Width >> m_TextureQuality) * camera->ProjectionMatrix()[0][0])),
((1.0 + camera->ProjectionMatrix()[1][2]) / camera->ProjectionMatrix()[1][1]),
(-2.0 / (m_Renderer->GetViewportSize().Height * camera->ProjectionMatrix()[1][1]))
(-2.0 / ((m_Renderer->GetViewportSize().Height >> m_TextureQuality) * camera->ProjectionMatrix()[1][1]))
);
@@ -120,26 +222,76 @@ void SSAOPass::Draw(GLuint depthBuffer, Camera* camera)
glBindTexture(GL_TEXTURE_2D, m_SSAOViewSpaceZTexture);
// How many pixel there are in a 1m long object 1m away from the camera
glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uProjScale"), m_Renderer->GetViewportSize().Height / (-2.0f * glm::tan(camera->FOV() * 0.5f)));
glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uProjScale"), (m_Renderer->GetViewportSize().Height >> m_TextureQuality) / (-2.0f * glm::tan(camera->FOV() * 0.5f)));
glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uRadius"), m_Radius);
glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uBias"), m_Bias);
glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uContrast"), m_Contrast);
glUniform1f(glGetUniformLocation(SSAOShaderHandle, "uIntensityScale"), m_IntensityScale);
glUniform1i(glGetUniformLocation(SSAOShaderHandle, "uNumOfSamples"), m_NumOfSamples);
glUniform1i(glGetUniformLocation(SSAOShaderHandle, "uNumOfTurns"), m_NumOfTurns);;
glUniform1i(glGetUniformLocation(SSAOShaderHandle, "uNumOfTurns"), m_NumOfTurns);
glUniform4fv(glGetUniformLocation(SSAOShaderHandle, "uProjInfo"), 1, glm::value_ptr(projInfo));
glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1
, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex);
m_DrawBloomPass->ClearBuffer();
m_DrawBloomPass->Draw(m_SSAOTexture);
DrawBloomPassState BloomState;
GLuint shaderHandle_horiz = m_GaussianProgram_horiz->GetHandle();
GLuint shaderHandle_vert = m_GaussianProgram_vert->GetHandle();
m_GaussianFrameBuffer_horiz.Bind();
m_GaussianProgram_horiz->Bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_SSAOTexture);
glBindVertexArray(m_ScreenQuad->VAO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
glDrawElementsBaseVertex(GL_TRIANGLES, m_ScreenQuad->MaterialGroups()[0].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1
, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex);
//Iterate some times to make it more gaussian.
for (int i = 1; i < m_Iterations; i++) {
//Vertical pass
m_GaussianFrameBuffer_vert.Bind();
m_GaussianProgram_vert->Bind();
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].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1
, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex);
//horizontal pass
m_GaussianFrameBuffer_horiz.Bind();
m_GaussianProgram_horiz->Bind();
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].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1
, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex);
}
//final vertical gaussian after the iterations are done
m_GaussianFrameBuffer_vert.Bind();
m_GaussianProgram_vert->Bind();
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].material->EndIndex - m_ScreenQuad->MaterialGroups()[0].material->StartIndex + 1
, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex);
glViewport(0, 0, (m_Renderer->GetViewportSize().Width), (m_Renderer->GetViewportSize().Height));
}
void SSAOPass::OnWindowResize() {
m_DrawBloomPass->OnWindowResize();
if (m_Quality == 0) {
return;
}
InitializeTexture();
m_SSAOFramBuffer.Generate();
m_SSAOViewSpaceZFramBuffer.Generate();
}