Thats because the way OpenGL works. It has simply no surfaces as DirectX has which has to do with the fact that it does not have any 2D at all like DirectX.
But Mark mentioned a DirectX7 module for 2D so hopefully this kind of problems will be over, at least on windows.
But Mark mentioned a DirectX7 module for 2D so hopefully this kind of problems will be over, at least on windows.