101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
#include <stdio.h>
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#include <allegro5/allegro.h>
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const float FPS = 60;
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int main(int argc, char *argv[])
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{
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ALLEGRO_DISPLAY *display = NULL;
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ALLEGRO_EVENT_QUEUE *event_queue = NULL;
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ALLEGRO_TIMER *timer = NULL;
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bool running = true;
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bool redraw = true;
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// Initialize allegro
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if (!al_init())
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{
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fprintf(stderr, "Failed to initialize allegro.\n");
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return 1;
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}
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// Initialize the timer
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timer = al_create_timer(1.0 / FPS);
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if (!timer)
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{
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fprintf(stderr, "Failed to create timer.\n");
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return 1;
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}
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// Create the display
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display = al_create_display(640, 480);
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if (!display)
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{
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fprintf(stderr, "Failed to create display.\n");
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return 1;
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}
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// Create the event queue
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event_queue = al_create_event_queue();
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if (!event_queue)
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{
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fprintf(stderr, "Failed to create event queue.");
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return 1;
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}
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// Register event sources
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al_register_event_source(event_queue, al_get_display_event_source(display));
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al_register_event_source(event_queue, al_get_timer_event_source(timer));
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// Display a black screen
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al_clear_to_color(al_map_rgb(0, 0, 0));
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al_flip_display();
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// Start the timer
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al_start_timer(timer);
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// Game loop
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while (running)
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{
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ALLEGRO_EVENT event;
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ALLEGRO_TIMEOUT timeout;
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// Initialize timeout
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al_init_timeout(&timeout, 0.06);
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// Fetch the event (if one exists)
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bool get_event = al_wait_for_event_until(event_queue, &event, &timeout);
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// Handle the event
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if (get_event)
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{
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switch (event.type)
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{
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case ALLEGRO_EVENT_TIMER:
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redraw = true;
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break;
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case ALLEGRO_EVENT_DISPLAY_CLOSE:
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running = false;
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break;
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default:
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fprintf(stderr, "Unsupported event received: %d\n", event.type);
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break;
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}
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}
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// Check if we need to redraw
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if (redraw && al_is_event_queue_empty(event_queue))
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{
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// Redraw
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al_clear_to_color(al_map_rgb(0, 0, 0));
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al_flip_display();
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redraw = false;
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}
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}
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// Clean up
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al_destroy_display(display);
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al_destroy_event_queue(event_queue);
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return 0;
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} |