Allegro Lesson 3

// gcc -Wall 2.c -o 2 $(pkg-config --libs allegro-5.0 allegro_image-5.0 allegro_font-5.0 allegro_ttf-5.0 allegro_dialog-5.0)

#include <allegro5/allegro.h>
#include <allegro5/allegro_font.h>
#include <allegro5/allegro_ttf.h>
#include <allegro5/allegro_native_dialog.h>

int main() {

    ALLEGRO_DISPLAY *display = NULL;

    if(!al_init()) {
        al_show_native_message_box(display, NULL, NULL, "failed to initialize allegro!", NULL, ALLEGRO_MESSAGEBOX_YES_NO);
        return -1;
    }

    display = al_create_display(640, 480);
    if(!display) {
        al_show_native_message_box(NULL, NULL, NULL, "failed to initialize display!", NULL, ALLEGRO_MESSAGEBOX_YES_NO);
        return -1;
    }

    al_init_font_addon();
    al_init_ttf_addon();

    ALLEGRO_FONT *font18 = al_load_font("arial.ttf", 18, 0);

    al_clear_to_color(al_map_rgb(46, 80, 255));

    al_draw_textf(font18, al_map_rgb(255, 255, 255), 50, 50, 0, "Hello, world, this is 18 point!");

    int screen_w = al_get_display_width(display);
    int screen_h = al_get_display_height(display);

    al_draw_textf(font18, al_map_rgb(255, 255, 255), screen_w/2, 400, ALLEGRO_ALIGN_CENTRE, "TEXT with variable output (textf): Screen width and height = %i / %i", screen_w, screen_h);

    al_flip_display();

    al_rest(60.0);

    al_destroy_font(font18);
    al_destroy_display(display);

    return 0;
}