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#include "allegro5/allegro.h"
#include <allegro5/allegro_primitives.h>
#include "common.c"
static void redraw(void)
{
ALLEGRO_COLOR black, white;
int w, h;
white = al_map_rgba_f(1, 1, 1, 1);
black = al_map_rgba_f(0, 0, 0, 1);
al_clear_to_color(white);
w = al_get_bitmap_width(al_get_target_bitmap());
h = al_get_bitmap_height(al_get_target_bitmap());
al_draw_line(0, h, w / 2, 0, black, 0);
al_draw_line(w / 2, 0, w, h, black, 0);
al_draw_line(w / 4, h / 2, 3 * w / 4, h / 2, black, 0);
al_flip_display();
}
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display;
ALLEGRO_TIMER *timer;
ALLEGRO_EVENT_QUEUE *events;
ALLEGRO_EVENT event;
int rs = 100;
bool resize = false;
(void)argc;
(void)argv;
/* Initialize Allegro and create an event queue. */
if (!al_init()) {
abort_example("Could not init Allegro.\n");
}
al_init_primitives_addon();
events = al_create_event_queue();
/* Setup a display driver and register events from it. */
al_set_new_display_flags(ALLEGRO_RESIZABLE);
display = al_create_display(rs, rs);
if (!display) {
abort_example("Could not create display.\n");
}
al_register_event_source(events, al_get_display_event_source(display));
timer = al_create_timer(0.1);
al_start_timer(timer);
/* Setup a keyboard driver and register events from it. */
al_install_keyboard();
al_register_event_source(events, al_get_keyboard_event_source());
al_register_event_source(events, al_get_timer_event_source(timer));
/* Display a pulsating window until a key or the closebutton is pressed. */
redraw();
while (true) {
if (resize) {
int s;
rs += 10;
if (rs == 300)
rs = 100;
s = rs;
if (s > 200)
s = 400 - s;
al_resize_display(display, s, s);
redraw();
resize = false;
}
al_wait_for_event(events, &event);
if (event.type == ALLEGRO_EVENT_TIMER) {
resize = true;
}
else if (event.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
break;
}
else if (event.type == ALLEGRO_EVENT_KEY_DOWN) {
break;
}
}
return 0;
}
/* vim: set sts=4 sw=4 et: */
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