---
name: "al_set_new_bitmap_samples"
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_set_new_bitmap_samples"
---

# al\_set\_new\_bitmap\_samples(3)

Allegro 5 API

## NAME

al\_set\_new\_bitmap\_samples - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  void al_set_new_bitmap_samples(int samples)
  ```

## DESCRIPTION

Sets the multi-sampling samples used by newly created bitmaps (on the current thread) if they are used with [al\_set\_target\_bitmap(3)](/al_set_target_bitmap/3.md). 0 means multi-sampling will not be used when drawing into the bitmap, which is the default. 1 means multi-sampling will be used but only using a single sample per pixel (so usually there will be no visual difference to not using multi-sampling at all).

*Note:* Some platforms have restrictions on when the multi-sampling buffer for a bitmap is realized, i.e. down-scaled back to the actual bitmap dimensions. This may only happen after a call to [al\_set\_target\_bitmap(3)](/al_set_target_bitmap/3.md). So for example:

-

  ```
  al_set_target_bitmap(multisample);
  al_clear_to_color(blue);
  al_draw_line(0, 0, 100, 100, red, 1);
  al_lock_bitmap(multisample, ...)
  // ERROR: the contents of the bitmap will be undefined
  al_set_target_bitmap(backbuffer);
  al_lock_bitmap(multisample, ...)
  // CORRECT: at this point, the bitmap contents are updated and
  // there will be an anti-aliased line in it.
  ```

## SINCE

5\.2.1

*\[Unstable API\]:* This is an experimental feature and currently only works for the OpenGL backend.