int FB_exit()
{
int ioctl_err;
char *errstr;
if(!FB_visible && (b_store != NULL))
{
free(b_store);
b_store = NULL;
}
ioctl_err = ioctl(fbufd,FBIOPUT_VSCREENINFO,&backup_var_info);
if(ioctl_err < 0)
{
errstr = strerror(errno);
fprintf(stderr,"FBlib:ioctl FBIOPUT_VSCREENINFO failed: %s \n",errstr);
return IOCTL_ERR;
}
fb_unmap();
close(fbufd);
if(uses_keyboard)
FB_kb_end();
printf("\n"); /* Cause a redraw to align the bottom of the screen */
return OK;
}
void fb_cleanup(void)
{
Debug("fb_cleanup()\n");
if (saved_fb)
fb_restore();
if (fb)
fb_unmap();
if (fb_fd != -1) {
if (saved_cmap.len) {
fb_cmap = saved_cmap;
RESTORE_AND_FREE_COMPONENT(red);
RESTORE_AND_FREE_COMPONENT(green);
RESTORE_AND_FREE_COMPONENT(blue);
if (fb_cmap.transp)
RESTORE_AND_FREE_COMPONENT(transp);
fb_set_cmap();
}
//fb_var = saved_var;
memcpy(&fb_var, &saved_var, sizeof(struct fb_var_screeninfo));
fb_set_var();
fb_get_var();
/* FIXME: compare fb_var with saved_var */
fb_get_fix();
/* FIXME: compare fb_fix with saved_fix */
fb_close();
}
}
void fb_switch(int n_sig)
{
static int switching=0;
signal(SIGUSR2, fb_switch); /* reset signal handler */
if(switching && (n_sig == SIGUSR2))
return;
if(switching == 0)
switching = 1;
if(FB_visible)
{
b_store = (char*)malloc(visiblesize);
if(b_store == NULL)
fprintf(stderr,"FBlib:cannot use backing store for VT switch");
else
memcpy(b_store, fbp, visiblesize);
fb_unmap();
fbp = b_store;
FB_visible = 0;
if(ioctl(TTY,VT_RELDISP,1) < 0)
{
fprintf(stderr,"FBlib:ioctl VT_RELDISP failed: %s \n",strerror(errno));
fb_map();
free(b_store);
FB_visible=1;
}
}
else
{
if(ioctl(TTY,VT_RELDISP,VT_ACKACQ) < 0)
{
fprintf(stderr,"FBlib:ioctl VT_RELDISP failed: %s (FATAL error)\n",strerror(errno));
FB_exit();
exit(1);
}
fb_map();
memcpy(fbp, b_store, visiblesize);
free(b_store);
b_store=NULL;
FB_visible=1;
}
switching=0;
return;
}
