milek7/sim branch opengl 3.3 renderer import

gl/framebuffer.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include "object.h"
+#include "bindable.h"
+#include "renderbuffer.h"
+#include "Texture.h"
+#include "cubemap.h"
+
+namespace gl
+{
+    class framebuffer : public object, public bindable<framebuffer>
+    {
+    public:
+        framebuffer();
+        ~framebuffer();
+
+        void attach(const opengl_texture &tex, GLenum location);
+        void attach(const cubemap &tex, int face, GLenum location);
+        void attach(const renderbuffer &rb, GLenum location);
+        void setup_drawing(int attachments);
+        void detach(GLenum location);
+        void clear(GLbitfield mask);
+
+        bool is_complete();
+        void blit_to(framebuffer *other, int w, int h, GLbitfield mask, GLenum attachment);
+        void blit_from(framebuffer *other, int w, int h, GLbitfield mask, GLenum attachment);
+
+        static void blit(framebuffer *src, framebuffer *dst, int sx, int sy, int w, int h, GLbitfield mask, GLenum attachment);
+
+        using bindable::bind;
+        static void bind(GLuint id);
+    };
+}