al_update_display_region (3alleg5)

• #include <allegro5/allegro.h>
  
  void al_update_display_region(int x, int y, int width, int height)
  
  

Does the same as al_flip_display(3alleg5), but tries to update only the specified region. With many drivers this is not possible, but for some it can improve performance.

The ALLEGRO_UPDATE_DISPLAY_REGION option (see al_get_display_option(3alleg5)) will specify the behavior of this function in the display.

al_flip_display(3alleg5), al_get_display_option(3alleg5)