1al_update_display_region(3)Library Functions Manualal_update_display_region(3)
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NAME

6       al_update_display_region
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SYNOPSIS

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

14       Does the same as al_flip_display(3), but tries to update only the spec‐
15       ified region.  With many drivers this is not possible, but for some  it
16       can improve performance.
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18       The ALLEGRO_UPDATE_DISPLAY_REGION option (see al_get_display_option(3))
19       will specify the behavior of this function in the display.
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SEE ALSO

22       al_flip_display(3), al_get_display_option(3)
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26Allegro reference manual                           al_update_display_region(3)