/*
 *    Example program for the Allegro library, by Evert Glebbeek.
 *
 *    This is a very simple program showing how to load and manipulate fonts.
 */


#include <allegro.h>



int main(void)
{
   FONT *f1, *f2, *f3, *f4, *f5;
   
   /* you should always do this at the start of Allegro programs */
   if (allegro_init() != 0)
      return 1;

   /* set up the keyboard handler */
   install_keyboard(); 

   /* set a graphics mode sized 320x200 */
   if (set_gfx_mode(GFX_AUTODETECT, 320, 200, 0, 0) != 0) {
      if (set_gfx_mode(GFX_SAFE, 320, 200, 0, 0) != 0) {
	 set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);
	 allegro_message("Unable to set any graphic mode\n%s\n", allegro_error);
	 return 1;
      }
   }

   /* set the color palette */
   set_palette(desktop_palette);

   /* clear the screen to white */
   clear_to_color(screen, makecol(255, 255, 255));

   /* We will use the lower case letters from Allegro's normal font and the
    * uppercase letters from the font in unifont.dat
    */
   f1 = load_font("unifont.dat", NULL, NULL);
   if (!f1) {
      set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);
      allegro_message("Cannot find unifont.dat in current directory.\n");
      return 1;
   }

   /* Extract character ranges */
   f2 = extract_font_range(font, ' ', 'A'-1);
   f3 = extract_font_range(f1, 'A', 'Z');
   f4 = extract_font_range(font, 'Z'+1, 'z');
   
   /* Merge fonts */
   font = merge_fonts(f4, f5 = merge_fonts(f2, f3));
   
   /* Destroy temporary fonts */
   destroy_font(f1);
   destroy_font(f2);
   destroy_font(f3);
   destroy_font(f4);
   destroy_font(f5);

   /* you don't need to do this, but on some platforms (eg. Windows) things
    * will be drawn more quickly if you always acquire the screen before
    * trying to draw onto it.
    */
   acquire_screen();

   /* write some text to the screen with black letters and transparent
    * background
    */
   textout_centre_ex(screen, font, "Hello, world!", SCREEN_W/2, SCREEN_H/2,
                     makecol(0,0,0), -1);

   /* you must always release bitmaps before calling any input functions */
   release_screen();

   /* wait for a key press */
   readkey();

   return 0;
}

END_OF_MAIN()