Add "al_is_ttf_addon_initialized"

Author: MarkOates

addons/ttf/allegro5/allegro_ttf.h

@@ -39,6 +39,7 @@ ALLEGRO_TTF_FUNC(ALLEGRO_FONT *, al_load_ttf_font_f, (ALLEGRO_FILE *file, char c
 ALLEGRO_TTF_FUNC(ALLEGRO_FONT *, al_load_ttf_font_stretch, (char const *filename, int w, int h, int flags));
 ALLEGRO_TTF_FUNC(ALLEGRO_FONT *, al_load_ttf_font_stretch_f, (ALLEGRO_FILE *file, char const *filename, int w, int h, int flags));
 ALLEGRO_TTF_FUNC(bool, al_init_ttf_addon, (void));
+ALLEGRO_TTF_FUNC(bool, al_is_ttf_addon_initialized, (void));
 ALLEGRO_TTF_FUNC(void, al_shutdown_ttf_addon, (void));
 ALLEGRO_TTF_FUNC(uint32_t, al_get_allegro_ttf_version, (void));
 

addons/ttf/ttf.c

@@ -1134,6 +1134,14 @@ bool al_init_ttf_addon(void)
 }
 
 
+/* Function: al_is_ttf_addon_initialized
+ */
+bool al_is_ttf_addon_initialized(void)
+{
+   return ttf_inited;
+}
+
+
 /* Function: al_shutdown_ttf_addon
  */
 void al_shutdown_ttf_addon(void)

docs/src/refman/font.txt

@@ -702,6 +702,12 @@ Call this after [al_init_font_addon] to make [al_load_font] recognize
 
 Returns true on success, false on failure.
 
+### API: al_is_ttf_addon_initialized
+
+Returns true if the TTF addon has been initialized, otherwise returns false.
+
+See also: [al_init_ttf_addon], [al_shutdown_ttf_addon]
+
 ### API: al_shutdown_ttf_addon
 
 Unloads the ttf addon again. You normally don't need to call this.