int main(int argc, char* args[])
{
int ret = 0;
int fbfd = 0;
struct pollfd evpoll = {
.events = POLLIN,
};
srand (time(NULL));
evpoll.fd = open_evdev("Raspberry Pi Sense HAT Joystick");
if (evpoll.fd < 0) {
fprintf(stderr, "Event device not found.\n");
return evpoll.fd;
}
fbfd = open_fbdev("RPi-Sense FB");
if (fbfd <= 0) {
ret = fbfd;
printf("Error: cannot open framebuffer device.\n");
goto err_ev;
}
fb = mmap(0, 128, PROT_READ | PROT_WRITE, MAP_SHARED, fbfd, 0);
if (!fb) {
ret = EXIT_FAILURE;
printf("Failed to mmap.\n");
goto err_fb;
}
memset(fb, 0, 128);
snake.tail = &snake.head;
reset();
while (running) {
while (poll(&evpoll, 1, 0) > 0)
handle_events(evpoll.fd);
game_logic();
if (check_collision(0)) {
reset();
}
render();
usleep (300000);
}
memset(fb, 0, 128);
reset();
munmap(fb, 128);
err_fb:
close(fbfd);
err_ev:
close(evpoll.fd);
return ret;
}
int gr_init(void)
{
gr_init_font();
gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (gr_vt_fd < 0) {
// This is non-fatal; post-Cupcake kernels don't have tty0.
perror("can't open /dev/tty0");
} else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
// However, if we do open tty0, we expect the ioctl to work.
perror("failed KDSETMODE to KD_GRAPHICS on tty0");
gr_exit();
return -1;
}
gr_backend = open_adf();
if (gr_backend) {
gr_draw = gr_backend->init(gr_backend);
if (!gr_draw) {
gr_backend->exit(gr_backend);
}
}
if (!gr_draw) {
gr_backend = open_fbdev();
gr_draw = gr_backend->init(gr_backend);
if (gr_draw == NULL) {
return -1;
}
}
overscan_offset_x = gr_draw->width * overscan_percent / 100;
overscan_offset_y = gr_draw->height * overscan_percent / 100;
gr_flip();
gr_flip();
return 0;
}
