---
name: "al_lock_bitmap_region_blocked"
section: "3"
platform: "linux"
package: "allegro"
version: "5.2.11.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/al_lock_bitmap_region_blocked"
---

# al\_lock\_bitmap\_region\_blocked(3)

Allegro 5 API

## NAME

al\_lock\_bitmap\_region\_blocked - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  ALLEGRO_LOCKED_REGION *al_lock_bitmap_region_blocked(ALLEGRO_BITMAP *bitmap,
     int x_block, int y_block, int width_block, int height_block, int flags)
  ```

## DESCRIPTION

Like [al\_lock\_bitmap\_blocked(3)](/al_lock_bitmap_blocked/3.md), but allows locking a sub-region, for performance. Unlike [al\_lock\_bitmap\_region(3)](/al_lock_bitmap_region/3.md) the region specified in terms of blocks and not pixels.

## SINCE

5\.1.9

## SEE ALSO

[al\_lock\_bitmap\_region(3)](/al_lock_bitmap_region/3.md), [al\_lock\_bitmap\_blocked(3)](/al_lock_bitmap_blocked/3.md)