xwayland: Replace xwl_window::present_window with ::present_flipped
There's no need to keep track of the window which last performed a Present flip. This fixes crashes due to the assertion in xwl_present_flips_stop failing. Fixes issue #10. The damage generated by a flip only needs to be ignored once, then xwl_window::present_flipped can be cleared. This may fix freezing in the (hypothetical) scenario where Present flips are performed on a window, followed by other drawing requests using the window as the destination, but nothing triggering xwl_present_flips_stop. The damage from the latter drawing requests would continue being ignored.
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@ -90,24 +90,19 @@ xwl_present_has_events(struct xwl_present_window *xwl_present_window)
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!xorg_list_is_empty(&xwl_present_window->release_queue);
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}
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static inline Bool
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xwl_present_is_flipping(WindowPtr window, struct xwl_window *xwl_window)
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{
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return xwl_window && xwl_window->present_window == window;
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}
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static void
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xwl_present_reset_timer(struct xwl_present_window *xwl_present_window)
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{
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if (xwl_present_has_events(xwl_present_window)) {
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WindowPtr present_window = xwl_present_window->window;
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Bool is_flipping = xwl_present_is_flipping(present_window,
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xwl_window_from_window(present_window));
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CARD32 timeout;
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if (xwl_present_window->frame_callback)
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timeout = TIMER_LEN_FLIP;
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else
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timeout = TIMER_LEN_COPY;
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xwl_present_window->frame_timer = TimerSet(xwl_present_window->frame_timer,
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0,
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is_flipping ? TIMER_LEN_FLIP :
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TIMER_LEN_COPY,
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0, timeout,
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&xwl_present_timer_callback,
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xwl_present_window);
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} else {
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@ -118,16 +113,12 @@ xwl_present_reset_timer(struct xwl_present_window *xwl_present_window)
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void
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xwl_present_cleanup(WindowPtr window)
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{
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struct xwl_window *xwl_window = xwl_window_from_window(window);
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struct xwl_present_window *xwl_present_window = xwl_present_window_priv(window);
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struct xwl_present_event *event, *tmp;
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if (!xwl_present_window)
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return;
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if (xwl_window && xwl_window->present_window == window)
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xwl_window->present_window = NULL;
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if (xwl_present_window->frame_callback) {
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wl_callback_destroy(xwl_present_window->frame_callback);
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xwl_present_window->frame_callback = NULL;
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@ -366,10 +357,6 @@ xwl_present_queue_vblank(WindowPtr present_window,
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if (!xwl_window)
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return BadMatch;
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if (xwl_window->present_window &&
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xwl_window->present_window != present_window)
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return BadMatch;
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event = malloc(sizeof *event);
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if (!event)
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return BadAlloc;
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@ -438,13 +425,6 @@ xwl_present_check_flip2(RRCrtcPtr crtc,
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if (!xwl_window)
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return FALSE;
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/*
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* Do not flip if there is already another child window doing flips.
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*/
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if (xwl_window->present_window &&
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xwl_window->present_window != present_window)
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return FALSE;
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/*
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* We currently only allow flips of windows, that have the same
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* dimensions as their xwl_window parent window. For the case of
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@ -481,8 +461,6 @@ xwl_present_flip(WindowPtr present_window,
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if (!event)
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return FALSE;
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xwl_window->present_window = present_window;
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buffer = xwl_glamor_pixmap_get_wl_buffer(pixmap, &buffer_created);
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event->event_id = event_id;
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@ -507,13 +485,6 @@ xwl_present_flip(WindowPtr present_window,
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/* We can flip directly to the main surface (full screen window without clips) */
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wl_surface_attach(xwl_window->surface, buffer, 0, 0);
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if (!xwl_present_window->frame_timer ||
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xwl_present_window->frame_timer_firing) {
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/* Realign timer */
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xwl_present_window->frame_timer_firing = FALSE;
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xwl_present_reset_timer(xwl_present_window);
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}
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if (!xwl_present_window->frame_callback) {
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xwl_present_window->frame_callback = wl_surface_frame(xwl_window->surface);
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wl_callback_add_listener(xwl_present_window->frame_callback,
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@ -521,6 +492,10 @@ xwl_present_flip(WindowPtr present_window,
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xwl_present_window);
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}
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/* Realign timer */
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xwl_present_window->frame_timer_firing = FALSE;
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xwl_present_reset_timer(xwl_present_window);
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wl_surface_damage(xwl_window->surface, 0, 0,
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damage_box->x2 - damage_box->x1,
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damage_box->y2 - damage_box->y1);
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@ -536,22 +511,15 @@ xwl_present_flip(WindowPtr present_window,
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}
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wl_display_flush(xwl_window->xwl_screen->display);
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xwl_window->present_flipped = TRUE;
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return TRUE;
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}
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static void
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xwl_present_flips_stop(WindowPtr window)
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{
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struct xwl_window *xwl_window = xwl_window_from_window(window);
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struct xwl_present_window *xwl_present_window = xwl_present_window_priv(window);
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if (!xwl_window)
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return;
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assert(xwl_window->present_window == window);
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xwl_window->present_window = NULL;
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/* Change back to the fast refresh rate */
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xwl_present_reset_timer(xwl_present_window);
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}
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@ -377,6 +377,18 @@ damage_report(DamagePtr pDamage, RegionPtr pRegion, void *data)
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struct xwl_window *xwl_window = data;
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struct xwl_screen *xwl_screen = xwl_window->xwl_screen;
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#ifdef GLAMOR_HAS_GBM
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if (xwl_window->present_flipped) {
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/* This damage is from a Present flip, which already committed a new
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* buffer for the surface, so we don't need to do anything in response
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*/
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RegionEmpty(DamageRegion(pDamage));
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xorg_list_del(&xwl_window->link_damage);
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xwl_window->present_flipped = FALSE;
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return;
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}
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#endif
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xorg_list_add(&xwl_window->link_damage, &xwl_screen->damage_window_list);
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}
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@ -722,11 +734,6 @@ xwl_screen_post_damage(struct xwl_screen *xwl_screen)
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xorg_list_for_each_entry_safe(xwl_window, next_xwl_window,
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&xwl_screen->damage_window_list, link_damage) {
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#ifdef GLAMOR_HAS_GBM
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/* Present on the main surface. So don't commit here as well. */
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if (xwl_window->present_window)
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continue;
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#endif
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/* If we're waiting on a frame callback from the server,
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* don't attach a new buffer. */
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if (xwl_window->frame_callback)
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@ -179,7 +179,9 @@ struct xwl_window {
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struct xorg_list link_damage;
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struct wl_callback *frame_callback;
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Bool allow_commits;
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WindowPtr present_window;
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#ifdef GLAMOR_HAS_GBM
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Bool present_flipped;
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#endif
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};
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#ifdef GLAMOR_HAS_GBM
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