Added FrameBuffer wrapper class

include/Engine/Rendering/Renderer.h

@@ -8,6 +8,7 @@
 //TODO: Temp resourceManager
 #include "../Core/ResourceManager.h"
 #include "Util/UnorderedMapVec2.h"
+#include "Util/FrameBuffer.h"
 
 class Renderer : public IRenderer
 {
@@ -22,7 +23,7 @@ private:
 	Texture* m_ErrorTexture;
 	Texture* m_WhiteTexture;
 	float m_CameraMoveSpeed;
-    GLuint m_PickingBuffer;
+    FrameBuffer m_PickingBuffer;
     GLuint m_PickingTexture;
     GLuint m_DepthBuffer;
 

include/Engine/Rendering/Util/FrameBuffer.h

@@ -0,0 +1,64 @@
+#ifndef FrameBuffer_h__
+#define FrameBuffer_h__
+
+#include "OpenGL.h"
+#include "GLError.h"
+
+class BufferResource
+{
+public:
+    BufferResource(GLuint* resourceHandle, GLenum resourceType, GLenum attachment);
+    
+    GLuint* m_ResourceHandle;
+    GLenum m_ResourceType;
+    GLenum m_Attachment;
+private:
+    
+};
+
+template <GLenum RESOURCETYPE>
+class ResourceType : public BufferResource
+{
+public:
+    ResourceType(GLuint* resourceHandle, GLenum attachment)
+        : BufferResource(resourceHandle, RESOURCETYPE, attachment) { }
+};
+
+class Texture2D : public ResourceType<GL_TEXTURE_2D>
+{
+public:
+    Texture2D(GLuint* resourceHandle, GLenum attachment)
+        : ResourceType(resourceHandle, attachment) { };
+
+    ~Texture2D();
+};
+
+class RenderBuffer : public ResourceType<GL_RENDERBUFFER>
+{
+public:
+    RenderBuffer(GLuint* resourceHandle, GLenum attachment)
+        : ResourceType(resourceHandle, attachment)
+    { };
+
+    ~RenderBuffer();
+};
+
+class FrameBuffer
+{
+public:
+    FrameBuffer()
+        : m_BufferHandle(0) { }
+    ~FrameBuffer();
+
+    void AddResource(std::shared_ptr<BufferResource> resource);
+    void Generate();
+    void Bind();
+    void Unbind();
+    GLuint GetHandle();
+
+private:
+    GLuint m_BufferHandle;
+    std::vector<std::shared_ptr<BufferResource>> m_Resources;
+};
+
+#endif

src/Engine/Rendering/Renderer.cpp

@@ -286,7 +286,7 @@ void Renderer::DrawScene(RenderQueueCollection& rq)
 
 void Renderer::PickingPass()
 {
-    glBindFramebuffer(GL_FRAMEBUFFER, m_PickingBuffer);
+    m_PickingBuffer.Bind();
 
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_CULL_FACE);
@@ -356,7 +356,7 @@ void Renderer::DrawScreenQuad(GLuint textureToDraw)
 // Will return a vec3 where RG is the PickColor and B is the Depth
 glm::vec3 Renderer::GetClickedPixelData(float x, float y)
 {
-    glBindFramebuffer(GL_FRAMEBUFFER, m_PickingBuffer);
+    m_PickingBuffer.Bind();
     glm::vec2 pixelData;
     glReadPixels(x, y, 1, 1, GL_RG, GL_FLOAT, &pixelData);
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
@@ -389,19 +389,8 @@ void Renderer::InitializeFrameBuffers()//TODO: Renderer: Get this to a better lo
     glGenRenderbuffers(1, &m_DepthBuffer);
     glBindRenderbuffer(GL_RENDERBUFFER, m_DepthBuffer);
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, m_Resolution.Width, m_Resolution.Height);
-
-
-    glGenFramebuffers(1, &m_PickingBuffer);
-    glBindFramebuffer(GL_FRAMEBUFFER, m_PickingBuffer);
-    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_DepthBuffer);
-    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_PickingTexture, 0);
-    GLenum PickingBufferTextures[] = { GL_COLOR_ATTACHMENT0 };
-    glDrawBuffers(1, PickingBufferTextures);
-
-    if (GLenum fbStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
-        LOG_ERROR("m_FbDeferred2 incomplete: 0x%x\n", fbStatus);
-        exit(EXIT_FAILURE);
-    }
-
-
+    
+    m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new RenderBuffer(&m_DepthBuffer, GL_DEPTH_ATTACHMENT)));
+    m_PickingBuffer.AddResource(std::shared_ptr<BufferResource>(new Texture2D(&m_PickingTexture, GL_COLOR_ATTACHMENT0)));
+    m_PickingBuffer.Generate();
 }

src/Engine/Rendering/Util/FrameBuffer.cpp

@@ -0,0 +1,88 @@
+
+#include "Rendering/Util/FrameBuffer.h"
+
+
+BufferResource::BufferResource(GLuint* resourceHandle, GLenum resourceType, GLenum attachment)
+{
+    m_ResourceHandle = resourceHandle;
+    m_ResourceType = resourceType;
+    m_Attachment = attachment;
+}
+
+Texture2D::~Texture2D()
+{
+    if (m_ResourceHandle != 0) {
+        glDeleteTextures(1, m_ResourceHandle);
+    }
+}
+
+
+RenderBuffer::~RenderBuffer()
+{
+    if (m_ResourceHandle != 0) {
+        glDeleteRenderbuffers(1, m_ResourceHandle);
+    }
+}
+
+
+FrameBuffer::~FrameBuffer()
+{
+    if (m_BufferHandle != 0) {
+        glDeleteFramebuffers(1, &m_BufferHandle);
+    }
+}
+
+void FrameBuffer::AddResource(std::shared_ptr<BufferResource> resource)
+{
+    m_Resources.push_back(resource);
+}
+
+void FrameBuffer::Generate()
+{
+    std::vector<GLenum> attachments;
+
+    glGenFramebuffers(1, &m_BufferHandle);
+    glBindFramebuffer(GL_FRAMEBUFFER, m_BufferHandle);
+
+    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);
+            break;
+        case GL_RENDERBUFFER:
+            glFramebufferRenderbuffer(GL_FRAMEBUFFER, (*it)->m_Attachment, (*it)->m_ResourceType, *(*it)->m_ResourceHandle);
+            break;
+        }
+        
+        GLERROR("FrameBuffer generate");
+
+        if ((*it)->m_Attachment != GL_DEPTH_ATTACHMENT) {
+            attachments.push_back((*it)->m_Attachment);
+        }
+    }
+        
+   
+    
+    GLenum* bufferTextures = &attachments[0];
+    glDrawBuffers(1, bufferTextures);
+
+    if (GLenum frameBufferStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+        LOG_ERROR("FrameBuffer incomplete: 0x%x\n", frameBufferStatus);
+        exit(EXIT_FAILURE);
+    }
+}
+
+void FrameBuffer::Bind()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, m_BufferHandle);
+}
+
+void FrameBuffer::Unbind()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+GLuint FrameBuffer::GetHandle()
+{
+    return m_BufferHandle;
+}