Provided by: allegro5-doc_5.2.6.0-1_all bug


       al_get_opengl_extension_list - Allegro 5 API


              #include <allegro5/allegro_opengl.h>

              ALLEGRO_OGL_EXT_LIST *al_get_opengl_extension_list(void)


       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

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

       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

              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.