1 2#include <allegro5/allegro.h> 3#include <stdio.h> 4 5#define WIDTH 640 6#define HEIGHT 480 7#define SIZE 10.0 8 9//Environmental Globals 10ALLEGRO_DISPLAY *display = NULL; 11ALLEGRO_EVENT_QUEUE *events = NULL; 12ALLEGRO_TIMER *timer; 13 14//Graphics Globals 15ALLEGRO_COLOR red; // = al_map_rgb(184,22,22); 16ALLEGRO_COLOR blue; // = al_map_rgb(22,22,184); 17ALLEGRO_COLOR green; // = al_map_rgb(22,184,22); 18 19void init_allegro() 20{ 21 //Colors 22 red=al_map_rgb(184,22,22); 23 blue=al_map_rgb(22,22,184); 24 green=al_map_rgb(22,184,22); 25 26 //Initialization 27 if(!al_init()) 28 { 29 fprintf(stderr,"Failed to init Allegro!\n"); 30 exit(0); 31 } 32 33 //Keyboard 34 if(!al_install_keyboard()) 35 { 36 fprintf(stderr,"Could not connect keyboard!\n"); 37 exit(0); 38 } 39 40 //create the display 41 display = al_create_display(WIDTH,HEIGHT); 42 if(!display) 43 { 44 fprintf(stderr,"Could not create display!\n"); 45 exit(0); 46 } 47 48 //initialize the event queue 49 events=al_create_event_queue(); 50 if(!events) 51 { 52 fprintf(stderr,"Could not create events\n"); 53 exit(0); 54 } 55 56 //Set the timer 57 timer = al_create_timer(1.0/60); 58 if(!timer) 59 { 60 fprintf(stderr,"Could not create timer\n"); 61 exit(0); 62 } 63 64 //Initialize the primitives addon 65 if(!al_init_primitives_addon()) 66 { 67 fprintf(stderr,"Primitives failed to load\n"); 68 } 69 70 //Register display, timer, keyboard to events 71 al_register_event_source(events,al_get_display_event_source(display)); 72 al_register_event_source(events,al_get_keyboard_event_source()); 73 al_register_event_source(events,al_get_timer_event_source(timer)); 74 75 //Initially Clear the Display 76 al_clear_to_color(al_map_rgb(0,0,0)); 77 al_flip_display(); 78 79 80 //Start the timer 81 al_start_timer(timer); 82} 83 84void exit_allegro() 85{ 86 al_destroy_display(display); 87 al_destroy_event_queue(events); 88 al_destroy_timer(timer); 89 al_shutdown_primitives_addon(); 90} 91 92void main() 93{ 94 //The event holder 95 ALLEGRO_EVENT event; 96 //The done 97 int done=0; 98 int redraw=1; 99 100 //init allegro 101 init_allegro(); 102 103 //The While Loop 104 while(!done) 105 { 106 al_wait_for_event(events,&event); 107 108 //Fires 60 times a second 109 if(event.type == ALLEGRO_EVENT_TIMER) 110 { 111 redraw=1; 112 } 113 else if(event.type == ALLEGRO_EVENT_KEY_DOWN) 114 { 115 if(event.keyboard.keycode == ALLEGRO_KEY_ESCAPE) 116 { 117 done = 1; 118 } 119 } 120 //Start drawing 121 if(redraw && al_is_event_queue_empty(events)) 122 { 123 redraw=0; 124 al_clear_to_color(al_map_rgb(60,100,10)); 125 al_draw_filled_rectangle(10.0,20.0,30.0,60.0,red); 126 //printf("Rect Drawn!\n"); 127 al_flip_display(); 128 } 129 } 130 //Shutdown 131 exit_allegro(); 132}