---
name: "al_have_opengl_extension"
section: "3alleg5"
platform: "linux"
package: "allegro5-doc"
version: "2:5.2.10.1+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/al_have_opengl_extension/3alleg5"
---

# al\_have\_opengl\_extension(3alleg5)

Allegro 5 API

## NAME

al\_have\_opengl\_extension - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro_opengl.h>
  bool al_have_opengl_extension(const char *extension)
  ```

## DESCRIPTION

This function is a helper to determine whether an OpenGL extension is available on the given display or not.

Example:

-

  ```
  bool packedpixels = al_have_opengl_extension("GL_EXT_packed_pixels");
  ```

If *packedpixels* is true then you can safely use the constants related to the packed pixels extension.

Returns true if the extension is available; false otherwise.