NAME

       al_lock_bitmap_region - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro.h>

              ALLEGRO_LOCKED_REGION *al_lock_bitmap_region(ALLEGRO_BITMAP *bitmap,
                 int x, int y, int width, int height, int format, int flags)

DESCRIPTION

       Like al_lock_bitmap(3alleg5), but only locks a specific area of the bitmap.  If the bitmap
       is a display bitmap, only that area of the texture will be updated when  it  is  unlocked.
       Locking only the region you indend to modify will be faster than locking the whole bitmap.

SEE ALSO

       ALLEGRO_LOCKED_REGION(3alleg5), ALLEGRO_PIXEL_FORMAT(3alleg5), al_unlock_bitmap(3alleg5)