made bind() private again, removed comments

J/fbo.h

@@ -23,6 +23,7 @@
 // TODO: more error checking in debug build.
 // TODO: make texture class? for easier switching between linear/nearest interpolation for example
 // NOTE: stencil attachment is not supported
+// NOTE: in end() we don't set a viewport, because it will be always set (the 'main' fbo is also an J::fbo)
 
 namespace J {
 
@@ -59,7 +60,7 @@ public:
 		unbind();
 	}
     
-    // ctor from EAGLContext, not using texture, so you cannot use it as lookup, only as renderer.
+    // ctor from EAGLContext, not using textures, so you cannot use it as lookup, only as renderer.
     fbo(EAGLContext* context, CAEAGLLayer* layer);
     
 	~fbo() {
@@ -78,22 +79,14 @@ public:
 
 	void begin(){
 		bind();
-        // FIXME: this should be done, but also switching back should be done...
-		//glPushAttrib(GL_VIEWPORT);
 		glViewport(0, 0, width, height);
-
-        // NOTE: commented out, because we don't want fbo's to nest.
-		/*GLint savedFramebuffer = -1;
-		glGetIntegerv(GL_FRAMEBUFFER_BINDING, &savedFramebuffer);
-		std::cout << "sfb: " << savedFramebuffer << ", fbo: " << fbo_number << std::endl;*/
 	}
 
 	void end(){
 		unbind();
-        // FIXME: switch back to previous viewport. See begin()
-		//glPopAttrib();
 	}
 
+private:
 	void bind(){
 		glBindFramebuffer(GL_FRAMEBUFFER, fbo_number);
 		check_error();
@@ -103,7 +96,6 @@ public:
 		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 	}
 
-private:
 	void create_attach_renderbuffer(GLenum format, GLenum attachment_point) {
 		GLuint buffer;
 		glGenRenderbuffers(1, &buffer);