4 extern int win_width, win_height;
5 extern float win_aspect;
8 bool app_init(int argc, char **argv);
12 void app_reshape(int x, int y);
13 void app_keyboard(int key, bool pressed);
14 void app_mouse_button(int bn, bool pressed, int x, int y);
15 void app_mouse_motion(int x, int y);
17 // the following functions are implemented by the window system backend
20 void app_swap_buffers();