Is it possible to use ofFbo without app window?

Hi everyone,

I am trying to use ofFbo without app window.
If I don’t disable the app window, the ofFbo works well. However, once I disable the app window, the ofFbo always remind me that “ofFbo: GL frame buffer object not supported by this graph card”.

Run openframworks without window :

ofAppBaseWindow* window = new ofAppNoWindow();
ofSetupOpenGL(window, 640, 480, OF_WINDOW); 

ofFbo a;
a.allocate(128, 48, GL_RGB);

ERROR INFO: ofFbo: GL frame buffer object not supported by this graph card.

Run openframworks with window:

ofAppGlutWindow window;
ofSetupOpenGL(&window, 640, 480, OF_WINDOW);

ofFbo a;
a.allocate(128, 48, GL_RGB);

INFO: WORKS WELL & NO PROBLEM

Thus, can anyone help me or give me some suggestion. Or, are there anybody know how to enable openGL without app window.

Thank you very much.

should be possible.
try a.setUseTexture(false)