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axyz/src/Engine/Rendering/BlurHUD.cpp
T
Teejoon 5146d21173 MSAA is now working
2016-03-12 22:22:53 +01:00

303 lines
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#include "Rendering/BlurHUD.h"
BlurHUD::BlurHUD(IRenderer* renderer)
: m_Renderer(renderer)
{
InitializeShaderPrograms();
InitializeBuffers();
InitializeTextures();
}
void BlurHUD::InitializeTextures()
{
m_BlackTexture = CommonFunctions::TryLoadResource<Texture, false>("Textures/Core/Black.png");
m_ScreenQuad = ResourceManager::Load<Model>("Models/Core/ScreenQuad.mesh");
}
void BlurHUD::InitializeShaderPrograms()
{
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->BindFragDataLocation(0, "fragmentColor");
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->BindFragDataLocation(0, "fragmentColor");
m_GaussianProgram_vert->Link();
}
m_FillDepthStencilProgram = ResourceManager::Load<ShaderProgram>("#FillDepthStencilProgram");
if (m_FillDepthStencilProgram->GetHandle() == 0) {
m_FillDepthStencilProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/FillDepthBuffer.vert.glsl")));
m_FillDepthStencilProgram->Compile();
m_FillDepthStencilProgram->Link();
}
m_CombineTexturesProgram = ResourceManager::Load<ShaderProgram>("#CombineTexturesProgram");
if (m_CombineTexturesProgram->GetHandle() == 0) {
m_CombineTexturesProgram->AddShader(std::shared_ptr<Shader>(new VertexShader("Shaders/CombineTexture.vert.glsl")));
m_CombineTexturesProgram->AddShader(std::shared_ptr<Shader>(new FragmentShader("Shaders/CombineTexture.frag.glsl")));
m_CombineTexturesProgram->Compile();
m_CombineTexturesProgram->BindFragDataLocation(0, "sceneColor");
m_CombineTexturesProgram->BindFragDataLocation(1, "bloomColor");
m_CombineTexturesProgram->Link();
}
GLERROR("Creating DepthFill program");
}
void BlurHUD::InitializeBuffers()
{
glm::vec2 res = glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
glm::vec2 res2 = glm::vec2(m_Renderer->GetViewportSize().Width/m_BlurQuality, m_Renderer->GetViewportSize().Height/m_BlurQuality);
CommonFunctions::GenerateTexture(&m_DepthStencil_horiz, GL_CLAMP_TO_BORDER, GL_NEAREST,
res2, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8);
CommonFunctions::GenerateTexture(&m_GaussianTexture_horiz, GL_CLAMP_TO_EDGE, GL_NEAREST,
res2, GL_RGBA16F, GL_RGBA, GL_FLOAT);
if (m_GaussianFrameBuffer_horiz.GetHandle() == 0) {
m_GaussianFrameBuffer_horiz.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_DepthStencil_horiz, GL_DEPTH_STENCIL_ATTACHMENT)));
m_GaussianFrameBuffer_horiz.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_horiz, GL_COLOR_ATTACHMENT0)));
}
m_GaussianFrameBuffer_horiz.Generate();
//CommonFunctions::GenerateTexture(&m_DepthStencil_vert, GL_CLAMP_TO_BORDER, GL_NEAREST,
// res2, GL_DEPTH24_STENCIL8, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8);
CommonFunctions::GenerateTexture(&m_GaussianTexture_vert, GL_CLAMP_TO_EDGE, GL_NEAREST,
res2, GL_RGBA16F, GL_RGBA, GL_FLOAT);
if (m_GaussianFrameBuffer_vert.GetHandle() == 0) {
m_GaussianFrameBuffer_vert.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_DepthStencil_horiz, GL_DEPTH_STENCIL_ATTACHMENT)));
m_GaussianFrameBuffer_vert.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_vert, GL_COLOR_ATTACHMENT0)));
}
m_GaussianFrameBuffer_vert.Generate();
CommonFunctions::GenerateTexture(&m_CombinedTexture, GL_CLAMP_TO_BORDER, GL_NEAREST,
res, GL_RGB16F, GL_RGB, GL_FLOAT);
if (m_CombinedTextureBuffer.GetHandle() == 0) {
m_CombinedTextureBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_CombinedTexture, GL_COLOR_ATTACHMENT0)));
}
m_CombinedTextureBuffer.Generate();
}
void BlurHUD::ClearBuffer()
{
GLERROR("PRE");
m_GaussianFrameBuffer_horiz.Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClearStencil(0x00);
glStencilMask(~0);
glDisable(GL_SCISSOR_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_GaussianFrameBuffer_horiz.Unbind();
m_GaussianFrameBuffer_vert.Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClearStencil(0x00);
glStencilMask(~0);
glDisable(GL_SCISSOR_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_GaussianFrameBuffer_vert.Unbind();
m_CombinedTextureBuffer.Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
m_CombinedTextureBuffer.Unbind();
GLERROR("END");
}
//Returns the finished blurred texture
GLuint BlurHUD::Draw(GLuint texture, RenderScene& scene)
{
GLERROR("DrawBloomPass::Draw: Pre");
bool shouldRun = false;
for (auto& job : scene.Jobs.SpriteJob) {
auto spriteJob = std::dynamic_pointer_cast<SpriteJob>(job);
if (!spriteJob) {
continue;
}
if (!spriteJob->BlurBackground) {
continue;
}
shouldRun = true;
break;
}
if(!shouldRun) {
return m_BlackTexture->m_Texture;
}
FillStencil(scene);
RenderState state;
state.Disable(GL_BLEND);
state.Disable(GL_DEPTH_TEST);
state.Disable(GL_CULL_FACE);
state.Enable(GL_STENCIL_TEST);
state.StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
state.StencilFunc(GL_EQUAL, 1, 0xFF);
state.StencilMask(0x00);
state.DepthMask(GL_FALSE);
state.Enable(GL_SCISSOR_TEST);
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.
m_GaussianFrameBuffer_horiz.Bind();
glViewport(0, 0, m_Renderer->GetViewportSize().Width/m_BlurQuality, m_Renderer->GetViewportSize().Height/m_BlurQuality);
glScissor(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
m_GaussianProgram_vert->Bind();
glUniform1i(glGetUniformLocation(shaderHandle_vert, "Lod"), 0);
m_GaussianProgram_horiz->Bind();
glUniform1i(glGetUniformLocation(shaderHandle_horiz, "Lod"), 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
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();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
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_vert.Unbind();
m_GaussianFrameBuffer_horiz.Bind();
m_GaussianProgram_horiz->Bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_vert);
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_GaussianFrameBuffer_horiz.Unbind();
}
//final vertical gaussian after the iterations are done
m_GaussianFrameBuffer_vert.Bind();
m_GaussianProgram_vert->Bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
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);
GLERROR("DrawBloomPass::Draw: END");
glViewport(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
glScissor(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
return m_GaussianTexture_vert;
}
void BlurHUD::OnWindowResize()
{
InitializeBuffers();
}
void BlurHUD::FillStencil(RenderScene& scene)
{
RenderState state;
state.BindFramebuffer(m_GaussianFrameBuffer_horiz.GetHandle());
state.Enable(GL_DEPTH_TEST);
state.Enable(GL_CULL_FACE);
state.Enable(GL_STENCIL_TEST);
state.StencilFunc(GL_ALWAYS, 1, 0xFF);
state.StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
state.StencilMask(0xFF);
state.AlphaFunc(GL_GEQUAL, 0.95f);
state.Enable(GL_ALPHA_TEST);
glViewport(0, 0, m_Renderer->GetViewportSize().Width/m_BlurQuality, m_Renderer->GetViewportSize().Height/m_BlurQuality);
m_FillDepthStencilProgram->Bind();
GLuint shaderHandle = m_FillDepthStencilProgram->GetHandle();
glm::mat4 VP = scene.Camera->ProjectionMatrix() * scene.Camera->ViewMatrix();
for (auto& job : scene.Jobs.SpriteJob) {
auto spriteJob = std::dynamic_pointer_cast<SpriteJob>(job);
if (!spriteJob) {
continue;
}
if (!spriteJob->BlurBackground) {
continue;
}
glm::mat4 MVP = VP * spriteJob->Matrix;
glUniformMatrix4fv(glGetUniformLocation(shaderHandle, "PVM"), 1, GL_FALSE, glm::value_ptr(MVP));
glBindVertexArray(spriteJob->Model->VAO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, spriteJob->Model->ElementBuffer);
glDrawElements(GL_TRIANGLES, spriteJob->EndIndex - spriteJob->StartIndex + 1, GL_UNSIGNED_INT, (void*)(spriteJob->StartIndex*sizeof(unsigned int)));
}
//state.BindFramebuffer(m_GaussianFrameBuffer_vert.GetHandle());
//for (auto& job : scene.Jobs.SpriteJob) {
// auto spriteJob = std::dynamic_pointer_cast<SpriteJob>(job);
// if (!spriteJob) {
// continue;
// }
// if(!spriteJob->BlurBackground) {
// continue;
// }
// glm::mat4 MVP = VP * spriteJob->Matrix;
// glUniformMatrix4fv(glGetUniformLocation(shaderHandle, "PVM"), 1, GL_FALSE, glm::value_ptr(MVP));
// glBindVertexArray(spriteJob->Model->VAO);
// glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, spriteJob->Model->ElementBuffer);
// glDrawElements(GL_TRIANGLES, spriteJob->EndIndex - spriteJob->StartIndex + 1, GL_UNSIGNED_INT, (void*)(spriteJob->StartIndex*sizeof(unsigned int)));
//}
glViewport(0, 0, m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height);
}
//Texture 1 will be used if texture 2 is black at that texel, else texture 2 is used.
GLuint BlurHUD::CombineTextures(GLuint texture1, GLuint texture2)
{
//RenderState state;
//state.BindFramebuffer(m_CombinedTextureBuffer.GetHandle());
//state.Disable(GL_DEPTH_TEST);
//state.Disable(GL_STENCIL_TEST);
m_CombineTexturesProgram->Bind();
glActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texture1);
glBindTexture(GL_TEXTURE_2D, texture2);
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);
return m_CombinedTexture;
}
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