static uint64_t
vl_dri2_screen_get_timestamp(struct vl_screen *vscreen, void *drawable)
{
struct vl_dri_screen *scrn = (struct vl_dri_screen *)vscreen;
xcb_dri2_get_msc_cookie_t cookie;
xcb_dri2_get_msc_reply_t *reply;
assert(scrn);
vl_dri2_set_drawable(scrn, (Drawable)drawable);
if (!scrn->last_ust) {
cookie = xcb_dri2_get_msc_unchecked(scrn->conn, (Drawable)drawable);
reply = xcb_dri2_get_msc_reply(scrn->conn, cookie, NULL);
if (reply) {
vl_dri2_handle_stamps(scrn, reply->ust_hi, reply->ust_lo,
reply->msc_hi, reply->msc_lo);
free(reply);
}
}
return scrn->last_ust;
}
static xcb_dri2_get_buffers_reply_t *
vl_dri2_get_flush_reply(struct vl_dri_screen *scrn)
{
xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
assert(scrn);
if (!scrn->flushed)
return NULL;
scrn->flushed = false;
free(xcb_dri2_swap_buffers_reply(scrn->conn, scrn->swap_cookie, NULL));
wait_sbc_reply = xcb_dri2_wait_sbc_reply(scrn->conn, scrn->wait_cookie, NULL);
if (!wait_sbc_reply)
return NULL;
vl_dri2_handle_stamps(scrn, wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo,
wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
free(wait_sbc_reply);
return xcb_dri2_get_buffers_reply(scrn->conn, scrn->buffers_cookie, NULL);
}