Initial commit of current work on Prime World Editor

OpenGL/CFramebuffer.cpp

@@ -0,0 +1,111 @@
+#include "CFramebuffer.h"
+#include <iostream>
+
+CFramebuffer::CFramebuffer()
+{
+    mInitialized = false;
+    mWidth = 0;
+    mHeight = 0;
+    mpRenderbuffer = nullptr;
+    mpTexture = nullptr;
+}
+
+CFramebuffer::CFramebuffer(u32 Width, u32 Height)
+{
+    mInitialized = false;
+    mWidth = 0;
+    mHeight = 0;
+    mpRenderbuffer = nullptr;
+    mpTexture = nullptr;
+    Resize(Width, Height);
+}
+
+CFramebuffer::~CFramebuffer()
+{
+    if (mInitialized)
+    {
+        glDeleteFramebuffers(1, &mFramebuffer);
+        delete mpRenderbuffer;
+        delete mpTexture;
+    }
+}
+
+void CFramebuffer::Init()
+{
+    if (!smStaticsInitialized)
+    {
+        glGetIntegerv(GL_FRAMEBUFFER_BINDING, &smDefaultFramebuffer);
+        smStaticsInitialized = true;
+    }
+
+    if (!mInitialized)
+    {
+        glGenFramebuffers(1, &mFramebuffer);
+        glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
+
+        mpRenderbuffer = new CRenderbuffer(mWidth, mHeight);
+        mpRenderbuffer->Bind();
+        glFramebufferRenderbuffer(
+            GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mpRenderbuffer->BufferID()
+        );
+
+        mpTexture = new CTexture(mWidth, mHeight);
+        mpTexture->Bind(0);
+        glFramebufferTexture2D(
+            GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mpTexture->TextureID(), 0
+        );
+
+        mStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+
+        if (mStatus != GL_FRAMEBUFFER_COMPLETE)
+            std::cout << "\rError: Framebuffer not complete\n";
+
+        mInitialized = true;
+    }
+}
+
+void CFramebuffer::Bind()
+{
+    if (!mInitialized) Init();
+    glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
+}
+
+void CFramebuffer::Resize(u32 Width, u32 Height)
+{
+    if ((mWidth != Width) || (mHeight != Height))
+    {
+        mWidth = Width;
+        mHeight = Height;
+
+        if (mInitialized)
+        {
+            mpRenderbuffer->Resize(Width, Height);
+            mpTexture->Resize(Width, Height);
+
+            glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
+            mpRenderbuffer->Bind();
+            glFramebufferRenderbuffer(
+                GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mpRenderbuffer->BufferID()
+            );
+
+            mpTexture->Bind(0);
+            glFramebufferTexture2D(
+                GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mpTexture->TextureID(), 0
+            );
+        }
+    }
+}
+
+CTexture* CFramebuffer::Texture()
+{
+    return mpTexture;
+}
+
+// ************ STATIC ************
+void CFramebuffer::BindDefaultFramebuffer()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, smDefaultFramebuffer);
+}
+
+GLint CFramebuffer::smDefaultFramebuffer;
+bool CFramebuffer::smStaticsInitialized;