void WaitFlip(bool block)
{
PollFD fds = new PollFD();
fds.fd = fd;
fds.events = PollFlags.In;
EventContext evctx = new EventContext();
evctx.version = EventContext.Version;
evctx.page_flip_handler = PageFlipPtr;
int timeout = block ? -1 : 0;
while (is_flip_queued)
{
fds.revents = 0;
if (Libc.poll(ref fds, 1, timeout) < 0)
break;
if ((fds.revents & (PollFlags.Hup | PollFlags.Error)) != 0)
break;
if ((fds.revents & PollFlags.In) != 0)
Drm.HandleEvent(fd, ref evctx);
else
break;
}
// Page flip has taken place, update buffer objects
if (!is_flip_queued)
{
IntPtr gbm_surface = WindowInfo.Handle;
Gbm.ReleaseBuffer(gbm_surface, bo);
bo = bo_next;
}
}
public static extern int HandleEvent(int fd, ref EventContext evctx);
