Provided by: allegro5-doc_5.2.8.0-2_all 
NAME
al_get_opengl_program_object - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro_opengl.h>
GLuint al_get_opengl_program_object(ALLEGRO_SHADER *shader)
DESCRIPTION
Returns the OpenGL program object associated with this shader, if the platform is
ALLEGRO_SHADER_GLSL. Otherwise, returns 0.