Add "al_is_primitives_addon_initialized"

Author: MarkOates

addons/primitives/allegro5/allegro_primitives.h

@@ -165,6 +165,7 @@ ALLEGRO_PRIM_FUNC(uint32_t, al_get_allegro_primitives_version, (void));
 * Primary Functions
 */
 ALLEGRO_PRIM_FUNC(bool, al_init_primitives_addon, (void));
+ALLEGRO_PRIM_FUNC(bool, al_is_primitives_addon_initialized, (void));
 ALLEGRO_PRIM_FUNC(void, al_shutdown_primitives_addon, (void));
 ALLEGRO_PRIM_FUNC(int, al_draw_prim, (const void* vtxs, const ALLEGRO_VERTEX_DECL* decl, ALLEGRO_BITMAP* texture, int start, int end, int type));
 ALLEGRO_PRIM_FUNC(int, al_draw_indexed_prim, (const void* vtxs, const ALLEGRO_VERTEX_DECL* decl, ALLEGRO_BITMAP* texture, const int* indices, int num_vtx, int type));

addons/primitives/primitives.c

@@ -55,6 +55,13 @@ bool al_init_primitives_addon(void)
    return ret;
 }
 
+/* Function: al_is_primitives_addon_initialized
+ */
+bool al_is_primitives_addon_initialized(void)
+{
+   return addon_initialized;
+}
+
 /* Function: al_shutdown_primitives_addon
  */
 void al_shutdown_primitives_addon(void)

docs/src/refman/primitives.txt

@@ -23,6 +23,12 @@ True on success, false on failure.
 
 See also: [al_shutdown_primitives_addon]
 
+### API: al_is_primitives_addon_initialized
+
+Returns true if the primitives addon is initialized, otherwise returns false.
+
+See also: [al_init_primitives_addon], [al_shutdown_primitives_addon]
+
 ### API: al_shutdown_primitives_addon
 
 Shut down the primitives addon. This is done automatically at program exit,