// Initialisation routines for Vivace example 0943

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <allegro.h>
#include "0943i.h"
#include "0943.h"

volatile int target_cycle;

void target_incrementor()
{
    target_cycle++;
}

END_OF_FUNCTION(target_incrementor);

volatile int last_fps;
volatile int frame_counter;

void count_frames()
{
    last_fps = frame_counter;
    frame_counter = 0;
}

END_OF_FUNCTION(count_frames);

void init_example(void)
{
    srand(time(NULL));

    allegro_init();
    install_keyboard();
    install_timer();

    LOCK_VARIABLE(target_cycle);
    LOCK_FUNCTION(target_incrementor);
    install_int_ex(target_incrementor, BPS_TO_TIMER(30));
    LOCK_VARIABLE(last_fps);
    LOCK_VARIABLE(frame_counter);
    LOCK_FUNCTION(count_frames);
    install_int_ex(count_frames, BPS_TO_TIMER(1));

    end_game = 0;
    pixels = 1000;

    dblbuffer = create_bitmap(320, 200);
    if (dblbuffer == NULL) {
	allegro_exit();
	printf("Sorry, not enough memory");
	exit(1);
    }
    clear(dblbuffer);

    if (set_gfx_mode(GFX_AUTODETECT, 320, 200, 0, 0) < 0) {
	printf("%s\n", allegro_error);
	exit(2);
    }
    actual_cycle = target_cycle = 0;	/* Start up-to-date */
    circle_pos = itofix(SCREEN_W / 2);
    add_pos = itofix(2);
}

void shutdown(void)
{
    destroy_bitmap(dblbuffer);
}