---
name: "al_apply_window_constraints"
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_apply_window_constraints"
---

# al\_apply\_window\_constraints(3)

Allegro 5 API

## NAME

al\_apply\_window\_constraints - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  void al_apply_window_constraints(ALLEGRO_DISPLAY *display, bool onoff)
  ```

## DESCRIPTION

Enable or disable previously set constraints by [al\_set\_window\_constraints(3)](/al_set_window_constraints/3.md) function.

If enabled, the specified display will be automatically resized to new sizes to conform constraints in next cases:

- •

  The specified display is resizable, not maximized and is not in fullscreen mode.

- •

  If the appropriate current display size (width or height) is less than the value of constraint. Applied to minimum constraints.

- •

  If the appropriate current display size (width or height) is greater than the value of constraint. Applied to maximum constraints.

Constrains are not applied when a display is toggle from windowed to maximized or fullscreen modes. When a display is toggle from maximized/fullscreen to windowed mode, then the display may be resized as described above. The later case is also possible when a user drags the maximized display via mouse.

If disabled, the specified display will stop using constraints.

## SEE ALSO

[al\_get\_window\_constraints(3)](/al_get_window_constraints/3.md), [al\_set\_window\_constraints(3)](/al_set_window_constraints/3.md)