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)

                                                          al_lock_bitmap_region(3a... Allegro reference manual()