bionic (3) al_get_opengl_extension_list.3alleg5.gz

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(3alleg5) and
       al_get_opengl_proc_address(3alleg5) functions instead.

              Note: the exact extensions exposed depend on how Allegro was compiled.  It is recommended  to  use
              al_have_opengl_extension(3alleg5)  and  al_get_opengl_proc_address(3alleg5)  for  the  most stable
              experience.