Added culling

Author: Pilzschaf

framebuffer.h

@@ -0,0 +1,43 @@
+#include <GL/glew.h>
+
+#include "defines.h"
+
+struct FrameBuffer {
+    void create(uint32 width, uint32 height) {
+        glGenFramebuffers(1, &fbo);
+
+        unsigned int textures[2];
+        glGenTextures(2, textures);
+
+        glBindTexture(GL_TEXTURE_2D, textures[0]);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        glBindTexture(GL_TEXTURE_2D, textures[1]);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, width, height, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glBindTexture(GL_TEXTURE_2D, 0);
+
+        bind();
+        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures[0], 0);
+        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, textures[1], 0);
+        unbind();
+    }
+
+    void destroy() {
+        glDeleteFramebuffers(1, &fbo);
+    }
+
+    void bind() {
+        glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    }
+
+    void unbind() {
+        glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    }
+
+private:
+    GLuint fbo;
+};