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WIP, trying to get blur to work with mipmaps

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This commit is contained in:
Tleety
2016-03-10 12:18:06 +01:00
parent 592edf7dba
commit a2244e87ad
7 changed files with 106 additions and 53 deletions
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src/Engine/Rendering/DrawBloomPass.cpp
+81 -39
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@@ -66,18 +66,31 @@ void DrawBloomPass::InitializeShaderPrograms()
void DrawBloomPass::InitializeBuffers()
{
CommonFunctions::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);
CommonFunctions::GenerateMipMapTexture(
&m_GaussianTexture_horiz, GL_CLAMP_TO_EDGE, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height)
, GL_RGB, GL_FLOAT, m_BloomLod);
CommonFunctions::GenerateMipMapTexture(
&m_GaussianTexture_vert, GL_CLAMP_TO_EDGE, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height)
, GL_RGB, GL_FLOAT, m_BloomLod);
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_horiz == nullptr) {
m_GaussianFrameBuffer_horiz = new FrameBuffer[m_BloomLod];
}
if (m_GaussianFrameBuffer_vert == nullptr) {
m_GaussianFrameBuffer_vert = new FrameBuffer[m_BloomLod];
}
CommonFunctions::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);
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();
for (int i = 0; i < m_BloomLod; i++) {
if(m_GaussianFrameBuffer_horiz[i].GetHandle() == 0) {
m_GaussianFrameBuffer_horiz[i].AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_horiz, GL_COLOR_ATTACHMENT0, i)));
}
m_GaussianFrameBuffer_horiz[i].Generate();
if (m_GaussianFrameBuffer_vert[i].GetHandle() == 0) {
m_GaussianFrameBuffer_vert[i].AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_GaussianTexture_vert, GL_COLOR_ATTACHMENT0, i)));
}
m_GaussianFrameBuffer_vert[i].Generate();
}
}
@@ -87,22 +100,53 @@ void DrawBloomPass::ClearBuffer()
return;
}
GLERROR("PRE");
m_GaussianFrameBuffer_horiz.Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
m_GaussianFrameBuffer_horiz.Unbind();
m_GaussianFrameBuffer_vert.Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
m_GaussianFrameBuffer_vert.Unbind();
for (int i = 0; i < m_BloomLod; i++) {
m_GaussianFrameBuffer_horiz[i].Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
m_GaussianFrameBuffer_horiz[i].Unbind();
m_GaussianFrameBuffer_vert[i].Bind();
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
m_GaussianFrameBuffer_vert[i].Unbind();
}
GLERROR("END");
}
void DrawBloomPass::Draw(GLuint texture)
{
if (m_Quality == 0) {
return;
}
for (int i = 0; i < m_BloomLod; i++) {
GaussianLodPass(i, texture);
}
}
void DrawBloomPass::OnWindowResize()
{
if (m_Quality == 0) {
return;
}
CommonFunctions::GenerateMipMapTexture(
&m_GaussianTexture_vert, GL_CLAMP_TO_EDGE, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height)
, GL_RGB, GL_FLOAT, m_BloomLod);
CommonFunctions::GenerateMipMapTexture(
&m_GaussianTexture_horiz, GL_CLAMP_TO_EDGE, glm::vec2(m_Renderer->GetViewportSize().Width, m_Renderer->GetViewportSize().Height)
, GL_RGB, GL_FLOAT, m_BloomLod);
for (int i = 0; i < m_BloomLod; i++) {
m_GaussianFrameBuffer_vert[i].Generate();
m_GaussianFrameBuffer_horiz[i].Generate();
}
}
void DrawBloomPass::GaussianLodPass(GLuint mipMap, GLuint texture)
{
GLERROR("DrawBloomPass::Draw: Pre");
DrawBloomPassState state;
@@ -110,10 +154,14 @@ void DrawBloomPass::Draw(GLuint texture)
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();
m_GaussianFrameBuffer_horiz[mipMap].Bind();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, mipMap);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, mipMap);
m_GaussianProgram_horiz->Bind();
glUniform1i(glGetUniformLocation(shaderHandle_horiz, "Lod"), mipMap);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
glBindVertexArray(m_ScreenQuad->VAO);
@@ -123,10 +171,12 @@ void DrawBloomPass::Draw(GLuint texture)
//Iterate some times to make it more gaussian.
for (int i = 1; i < m_Iterations; i++) {
//Vertical pass
m_GaussianFrameBuffer_vert.Bind();
m_GaussianFrameBuffer_vert[mipMap].Bind();
m_GaussianProgram_vert->Bind();
glUniform1i(glGetUniformLocation(shaderHandle_vert, "Lod"), mipMap);
glActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
glBindVertexArray(m_ScreenQuad->VAO);
@@ -134,27 +184,29 @@ void DrawBloomPass::Draw(GLuint texture)
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_vert[mipMap].Unbind();
m_GaussianFrameBuffer_horiz.Bind();
m_GaussianFrameBuffer_horiz[mipMap].Bind();
m_GaussianProgram_horiz->Bind();
glUniform1i(glGetUniformLocation(shaderHandle_horiz, "Lod"), mipMap);
glActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE0);
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);
m_GaussianFrameBuffer_horiz.Unbind();
m_GaussianFrameBuffer_horiz[mipMap].Unbind();
}
//final vertical gaussian after the iterations are done
m_GaussianFrameBuffer_vert.Bind();
m_GaussianFrameBuffer_vert[mipMap].Bind();
m_GaussianProgram_vert->Bind();
glUniform1i(glGetUniformLocation(shaderHandle_vert, "Lod"), mipMap);
glActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_GaussianTexture_horiz);
glBindVertexArray(m_ScreenQuad->VAO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_ScreenQuad->ElementBuffer);
@@ -162,16 +214,6 @@ void DrawBloomPass::Draw(GLuint texture)
, GL_UNSIGNED_INT, 0, m_ScreenQuad->MaterialGroups()[0].material->StartIndex);
GLERROR("DrawBloomPass::Draw: END");
}
m_GaussianFrameBuffer_vert[mipMap].Unbind();
void DrawBloomPass::OnWindowResize()
{
if (m_Quality == 0) {
return;
}
CommonFunctions::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);
m_GaussianFrameBuffer_vert.Generate();
CommonFunctions::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);
m_GaussianFrameBuffer_horiz.Generate();
}