DragonFly On-Line Manual Pages

al_get_opengl_extension_list(3)                al_get_opengl_extension_list(3)

NAME
       al_get_opengl_extension_list - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro_opengl.h>

              ALLEGRO_OGL_EXT_LIST *al_get_opengl_extension_list(void)

DESCRIPTION
       Returns the list of OpenGL extensions supported by Allegro, for the
       given display.

       Allegro will keep information about all extensions it knows about in a
       structure returned by al_get_opengl_extension_list.

       For example:

              if (al_get_opengl_extension_list()->ALLEGRO_GL_ARB_multitexture) {
                  use it
              }

       The extension will be set to true if available for the given display
       and false otherwise.  This means to use the definitions and functions
       from an OpenGL extension, all you need to do is to check for it as
       above at run time, after acquiring the OpenGL display from Allegro.

       Under Windows, this will also work with WGL extensions, and under Unix
       with GLX extensions.

       In case you want to manually check for extensions and load function
       pointers yourself (say, in case the Allegro developers did not include
       it yet), you can use the al_have_opengl_extension(3) and
       al_get_opengl_proc_address(3) functions instead.

Allegro reference manual                       al_get_opengl_extension_list(3)