jtmm2/src/main.c

#include "conf.h"
#include "editor.h"
#include "input.h"
#include "level.h"
#include "missile.h"
#include "player.h"
#include "time.h"
#include "util.h"
#include <gint/cpu.h>
#include <gint/display.h>
#include <gint/gint.h>
#include <gint/timer.h>

static struct Player player;
static int timer;
volatile int has_ticked;
int time = 0;

static void init(void);
static void deinit(void);
static void draw(void);
static void update(void);
static int timer_callback(volatile int *);

int
main(void)
{
	int frameskip = 1;

	init();

	level_load(0);

	for (;;) {
		int i;
		draw();
		for (i = 0; i < frameskip; i++) {
			if (has_ticked > frameskip) frameskip = has_ticked;
			while (!has_ticked)
				sleep();
			while (has_ticked) {
				time += has_ticked;
				has_ticked = 0;
			}
			update();
			if (input_pressed(K_EXIT) && ask_confirm("exit game"))
				goto game_loop_end;
			if (input_pressed(K_SKIP) && ask_confirm("skip level"))
				level_next();
		}
	};
game_loop_end:

	deinit();
	return 0;
}

static void
init(void)
{
	extern font_t font_dina;
	dfont(&font_dina);

	timer = timer_configure(TIMER_ANY, 1000000 / TARGET_FPS,
	                        GINT_CALL(timer_callback, &has_ticked));
	timer_start(timer);

	input_init();
	level_init(&player);
}

static void
deinit(void)
{
	level_deinit();
	missile_manager_free();

	timer_stop(timer);
}

static void
update(void)
{
	input_update();
	missile_manager_update(vecf(player_middle(&player)));
	player_update(&player);
	/* enter editor */
	if (input_pressed(K_EDITOR)) editor();
	/* save replay */
	if (input_pressed(K_SAVE_REPLAY)) {
		gint_world_switch(GINT_CALL(input_dump_replay));
		has_ticked = 0;
	}
	/* playback */
	if (input_pressed(K_PLAYBACK))
		gint_world_switch(GINT_CALL(input_load_replay));
}

static void
draw(void)
{
	dclear(C_BLACK);
	level_draw();
	missile_manager_draw();
	player_draw(&player);
	level_draw_name();
	time_draw();
	dupdate();
}

static int
timer_callback(volatile int *arg)
{
	*arg += 1;
	return 0;
}