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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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include/Engine/Rendering/DrawBloomPass.h
+4 -2
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@@ -39,6 +39,7 @@ public:
private:
void GaussianLodPass(GLuint mipMap, GLuint texture);
Texture* m_BlackTexture;
Model* m_ScreenQuad;
@@ -47,12 +48,13 @@ private:
//const LightCullingPass* m_LightCullingPass
int m_Iterations;
int m_Quality = 0;
int m_BloomLod = 4;
GLuint m_GaussianTexture_horiz = 0;
GLuint m_GaussianTexture_vert = 0;
FrameBuffer m_GaussianFrameBuffer_horiz;
FrameBuffer m_GaussianFrameBuffer_vert;
FrameBuffer* m_GaussianFrameBuffer_horiz = nullptr;
FrameBuffer* m_GaussianFrameBuffer_vert = nullptr;
ShaderProgram* m_GaussianProgram_horiz;
ShaderProgram* m_GaussianProgram_vert;
include/Engine/Rendering/FrameBuffer.h
+8 -7
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@@ -7,11 +7,12 @@
class BufferResource
{
public:
BufferResource(GLuint* resourceHandle, GLenum resourceType, GLenum attachment);
BufferResource(GLuint* resourceHandle, GLenum resourceType, GLenum attachment, GLuint mipMapLod);
GLuint* m_ResourceHandle;
GLenum m_ResourceType;
GLenum m_Attachment;
GLuint m_MipMapLod = 0;
private:
};
@@ -20,15 +21,15 @@ template <GLenum RESOURCETYPE>
class ResourceType : public BufferResource
{
public:
ResourceType(GLuint* resourceHandle, GLenum attachment)
: BufferResource(resourceHandle, RESOURCETYPE, attachment) { }
ResourceType(GLuint* resourceHandle, GLenum attachment, GLuint mipMapLod)
: BufferResource(resourceHandle, RESOURCETYPE, attachment, mipMapLod) { }
};
class Texture2D : public ResourceType<GL_TEXTURE_2D>
{
public:
Texture2D(GLuint* resourceHandle, GLenum attachment)
: ResourceType(resourceHandle, attachment) { };
Texture2D(GLuint* resourceHandle, GLenum attachment, GLuint mipMapLod = 0)
: ResourceType(resourceHandle, attachment, mipMapLod) { };
~Texture2D();
};
@@ -37,7 +38,7 @@ class RenderBuffer : public ResourceType<GL_RENDERBUFFER>
{
public:
RenderBuffer(GLuint* resourceHandle, GLenum attachment)
: ResourceType(resourceHandle, attachment)
: ResourceType(resourceHandle, attachment, 0)
{ };
~RenderBuffer();
@@ -47,7 +48,7 @@ class Texture2DArray : public ResourceType<GL_TEXTURE_2D_ARRAY>
{
public:
Texture2DArray(GLuint* resourceHandle, GLenum attachment)
: ResourceType(resourceHandle, attachment)
: ResourceType(resourceHandle, attachment, 0)
{ };
~Texture2DArray();
resources/Shaders/Gaussian_horiz.frag.glsl
+4 -1
View File
@@ -2,6 +2,7 @@
#extension GL_EXT_gpu_shader4 : enable
layout (binding = 0) uniform sampler2D Texture;
uniform int Lod;
in VertexData{
vec2 TextureCoordinate;
@@ -10,12 +11,14 @@ in VertexData{
out vec4 fragmentColor;
uniform float weight[5] = float[](0.227027, 0.1945946, 0.1216216, 0.054054, 0.016216);
//uniform float weight[3] = float[](0.265495, 0.226535, 0.140718);
void main()
{
vec2 tex_offset = 1.0 / textureSize2D(Texture, 0);
vec2 tex_offset = 1.0 / textureSize(Texture, Lod);
vec3 center = texture(Texture, Input.TextureCoordinate).rgb;
vec3 result = center * weight[0];
for(int i = 1; i < 5; ++i) {
vec4 eastFragments = texture(Texture, Input.TextureCoordinate + vec2(tex_offset.x * i, 0.0));
vec4 westFragments = texture(Texture, Input.TextureCoordinate - vec2(tex_offset.x * i, 0.0));
resources/Shaders/Gaussian_vert.frag.glsl
+4 -1
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@@ -2,6 +2,7 @@
#extension GL_EXT_gpu_shader4 : enable
layout (binding = 0) uniform sampler2D Texture;
uniform int Lod;
in VertexData{
vec2 TextureCoordinate;
@@ -10,12 +11,14 @@ in VertexData{
out vec4 fragmentColor;
uniform float weight[5] = float[](0.227027, 0.1945946, 0.1216216, 0.054054, 0.016216);
//uniform float weight[3] = float[](0.265495, 0.226535, 0.140718);
void main()
{
vec2 tex_offset = 1.0 / textureSize2D(Texture, 0);
vec2 tex_offset = 1.0 / textureSize(Texture, Lod);
vec3 center = texture(Texture, Input.TextureCoordinate).rgb;
vec3 result = center * weight[0];
for(int i = 1; i < 5; ++i) {
vec4 northFragments = texture(Texture, Input.TextureCoordinate + vec2(0.0, tex_offset.y * i));
vec4 southFragments = texture(Texture, Input.TextureCoordinate - vec2(0.0, tex_offset.y * i));
src/Engine/Rendering/DrawBloomPass.cpp
+81 -39
View File
@@ -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();
}
src/Engine/Rendering/FrameBuffer.cpp
+3 -2
View File
@@ -2,11 +2,12 @@
#include "Rendering/FrameBuffer.h"
BufferResource::BufferResource(GLuint* resourceHandle, GLenum resourceType, GLenum attachment)
BufferResource::BufferResource(GLuint* resourceHandle, GLenum resourceType, GLenum attachment, GLuint mipMapLod)
{
m_ResourceHandle = resourceHandle;
m_ResourceType = resourceType;
m_Attachment = attachment;
m_MipMapLod = mipMapLod;
}
Texture2D::~Texture2D()
@@ -58,7 +59,7 @@ void FrameBuffer::Generate()
for (auto it = m_Resources.begin(); it != m_Resources.end(); it++) {
switch ((*it)->m_ResourceType) {
case GL_TEXTURE_2D:
glFramebufferTexture2D(GL_FRAMEBUFFER, (*it)->m_Attachment, (*it)->m_ResourceType, *(*it)->m_ResourceHandle, 0);
glFramebufferTexture(GL_FRAMEBUFFER, (*it)->m_Attachment, *(*it)->m_ResourceHandle, (*it)->m_MipMapLod);
GLERROR("FrameBuffer generate: glFramebufferTexture2D");
break;
case GL_RENDERBUFFER:
src/Engine/Rendering/Util/CommonFunctions.cpp
+2 -1
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@@ -28,7 +28,8 @@ void CommonFunctions::GenerateMipMapTexture(GLuint* texture, GLenum wrapping, gl
glGenTextures(1, texture);
glBindTexture(GL_TEXTURE_2D, *texture);
glTexStorage2D(GL_TEXTURE_2D, numMipMaps, GL_RGBA8, dimensions.x, dimensions.y);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, dimensions.x, dimensions.y, format, type, texture);
//glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, dimensions.x, dimensions.y, format, type, NULL);
GLERROR("MipMap Texture glTexSubImage2D failed");
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapping);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapping);