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ClutterX11TexturePixmap: Optimize ConfigureEvent handling
ClutterX11TexturePixmap watches for configure events to tell when it needs to name a new pixmap for the window. However, ConfigureEvents occur on moves in addition to resizes, and doing round trips and naming new pixmaps every time a window is moved is a real performance killer. Add clutter_x11_texture_pixmap_sync_window_internal() that takes the size/position of the window as arguments rather than always calling XGetWindowAttributes. This allows us to bypass all work other than notifying the window-x/window-y properties when we get a ConfigurEvent for a move. The last received width/height is saved to allow us to also omit XGetWindowAttributes on MapNotify events. The public clutter_x11_texture_pixmap_sync_window() becomes a bit less efficient since we no longer combine the roundtrips for XGetWindowAttributes() and XCompositeNameWindowPixmap(), but it appears to have no callers in current publicly available code. Several FIXME's are added for areas where there are still weird things going on in the code or improvements could be made. http://bugzilla.clutter-project.org/show_bug.cgi?id=2356
This commit is contained in:
Owen W. Taylor
Emmanuele Bassi
parent
1fdd82fcf1
commit
9df6f0c524
@ -95,6 +95,13 @@ clutter_x11_texture_pixmap_update_area_real (ClutterX11TexturePixmap *texture,
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gint width,
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gint height);
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static void
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clutter_x11_texture_pixmap_sync_window_internal (ClutterX11TexturePixmap *texture,
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int x,
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int y,
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int width,
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int height,
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gboolean override_redirect);
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static void
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clutter_x11_texture_pixmap_set_mapped (ClutterX11TexturePixmap *texture, gboolean mapped);
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static void
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clutter_x11_texture_pixmap_destroyed (ClutterX11TexturePixmap *texture);
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@ -111,8 +118,11 @@ struct _ClutterX11TexturePixmapPrivate
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Damage damage;
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gint window_x, window_y;
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gint window_width, window_height;
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guint window_redirect_automatic : 1;
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/* FIXME: this is inconsistently either whether the window is mapped or whether
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* it is viewable, and isn't updated correctly. */
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guint window_mapped : 1;
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guint destroyed : 1;
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guint owns_pixmap : 1;
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@ -212,8 +222,20 @@ on_x_event_filter_too (XEvent *xev, ClutterEvent *cev, gpointer data)
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switch (xev->type) {
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case MapNotify:
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clutter_x11_texture_pixmap_sync_window_internal (texture,
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priv->window_x,
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priv->window_y,
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priv->window_width,
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priv->window_height,
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priv->override_redirect);
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break;
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case ConfigureNotify:
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clutter_x11_texture_pixmap_sync_window (texture);
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clutter_x11_texture_pixmap_sync_window_internal (texture,
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xev->xconfigure.x,
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xev->xconfigure.y,
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xev->xconfigure.width,
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xev->xconfigure.height,
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xev->xconfigure.override_redirect);
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break;
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case UnmapNotify:
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clutter_x11_texture_pixmap_set_mapped (texture, FALSE);
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@ -995,12 +1017,9 @@ clutter_x11_texture_pixmap_set_window (ClutterX11TexturePixmap *texture,
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clutter_x11_untrap_x_errors ();
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if (priv->window)
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{
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XSelectInput (dpy, priv->window,
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attr.your_event_mask | StructureNotifyMask);
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clutter_x11_add_filter (on_x_event_filter_too, (gpointer)texture);
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}
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XSelectInput (dpy, priv->window,
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attr.your_event_mask | StructureNotifyMask);
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clutter_x11_add_filter (on_x_event_filter_too, (gpointer)texture);
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g_object_ref (texture);
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g_object_notify (G_OBJECT (texture), "window");
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@ -1008,12 +1027,113 @@ clutter_x11_texture_pixmap_set_window (ClutterX11TexturePixmap *texture,
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clutter_x11_texture_pixmap_set_mapped (texture,
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attr.map_state == IsViewable);
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clutter_x11_texture_pixmap_sync_window (texture);
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clutter_x11_texture_pixmap_sync_window_internal (texture,
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attr.x, attr.y,
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attr.width, attr.height,
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attr.override_redirect);
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g_object_unref (texture);
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#endif /* HAVE_XCOMPOSITE */
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}
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static void
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clutter_x11_texture_pixmap_sync_window_internal (ClutterX11TexturePixmap *texture,
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int x,
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int y,
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int width,
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int height,
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gboolean override_redirect)
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{
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ClutterX11TexturePixmapPrivate *priv;
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Pixmap pixmap = None;
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gboolean mapped = FALSE;
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gboolean notify_x = FALSE;
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gboolean notify_y = FALSE;
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gboolean notify_override_redirect = FALSE;
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priv = texture->priv;
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if (priv->destroyed)
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return;
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notify_x = x != priv->window_x;
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notify_y = y != priv->window_y;
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notify_override_redirect = override_redirect != priv->override_redirect;
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priv->window_x = x;
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priv->window_y = y;
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priv->window_width = width;
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priv->window_height = height;
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priv->override_redirect = override_redirect;
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if (!clutter_x11_has_composite_extension())
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{
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/* FIXME: this should just be an error, this is unlikely to work worth anything */
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clutter_x11_texture_pixmap_set_pixmap (texture, priv->window);
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return;
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}
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if (priv->pixmap == None || width != priv->pixmap_width || height != priv->pixmap_height)
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{
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/* Note that we're checking the size from the event against the size we obtained
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* from the last XCompositeNameWindowPixmap/XGetGeometry pair. This will always
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* end up right in the end, but we can have a series like:
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*
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* Window sized to 100x100
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* Window sized to 110x110
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* Window sized to 120x120
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* Configure received for 100x100 - NameWindowPixmap
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* Configure received for 110x110 - NameWindowPixmap
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* Configure received for 120x120 - last size OK
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*
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* Where we NameWindowPixmap several times in a row. (Using pixmap_width/pixmap_height
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* rather than window_width/window_height saves the last one.)
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*/
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Display *dpy = clutter_x11_get_default_display ();
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/* NB: It's only valid to name a pixmap if the window is viewable.
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*
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* We don't explicitly check this though since there would be a race
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* between checking and naming unless we use a server grab which is
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* undesireable.
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*
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* Instead we gracefully handle any error with naming the pixmap.
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*/
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clutter_x11_trap_x_errors ();
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pixmap = XCompositeNameWindowPixmap (dpy, priv->window);
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/* Possible improvement: combine with the XGetGeometry in
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* clutter_x11_texture_pixmap_set_pixmap() */
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XSync(dpy, False);
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if (clutter_x11_untrap_x_errors ())
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pixmap = None;
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}
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g_object_ref (texture); /* guard against unparent */
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g_object_freeze_notify (G_OBJECT (texture));
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/* FIXME: mapped is always FALSE */
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clutter_x11_texture_pixmap_set_mapped (texture, mapped);
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if (pixmap)
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{
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clutter_x11_texture_pixmap_set_pixmap (texture, pixmap);
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priv->owns_pixmap = TRUE;
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}
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if (notify_override_redirect)
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g_object_notify (G_OBJECT (texture), "window-override-redirect");
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if (notify_x)
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g_object_notify (G_OBJECT (texture), "window-x");
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if (notify_y)
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g_object_notify (G_OBJECT (texture), "window-y");
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g_object_thaw_notify (G_OBJECT (texture));
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g_object_unref (texture);
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}
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/**
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* clutter_x11_texture_pixmap_sync_window:
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* @texture: the texture to bind
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@ -1027,7 +1147,6 @@ void
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clutter_x11_texture_pixmap_sync_window (ClutterX11TexturePixmap *texture)
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{
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ClutterX11TexturePixmapPrivate *priv;
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Pixmap pixmap;
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g_return_if_fail (CLUTTER_X11_IS_TEXTURE_PIXMAP (texture));
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@ -1036,66 +1155,22 @@ clutter_x11_texture_pixmap_sync_window (ClutterX11TexturePixmap *texture)
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if (priv->destroyed)
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return;
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if (!clutter_x11_has_composite_extension())
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{
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clutter_x11_texture_pixmap_set_pixmap (texture, priv->window);
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return;
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}
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if (priv->window)
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{
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XWindowAttributes attr;
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Display *dpy = clutter_x11_get_default_display ();
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gboolean mapped = FALSE;
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gboolean notify_x = FALSE;
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gboolean notify_y = FALSE;
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gboolean notify_override_redirect = FALSE;
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Status status;
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/* NB: It's only valid to name a pixmap if the window is viewable.
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*
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* We don't explicitly check this though since there would be a race
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* between checking and naming unless we use a server grab which is
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* undesireable.
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*
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* Instead we gracefully handle any error with naming the pixmap.
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*/
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clutter_x11_trap_x_errors ();
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pixmap = XCompositeNameWindowPixmap (dpy, priv->window);
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status = XGetWindowAttributes (dpy, priv->window, &attr);
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if (status != 0)
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{
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notify_x = attr.x != priv->window_x;
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notify_y = attr.y != priv->window_y;
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notify_override_redirect = attr.override_redirect != priv->override_redirect;
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priv->window_x = attr.x;
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priv->window_y = attr.y;
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priv->override_redirect = attr.override_redirect;
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}
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clutter_x11_texture_pixmap_sync_window_internal (texture,
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attr.x, attr.y,
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attr.width, attr.height,
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attr.override_redirect);
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/* We rely on XGetWindowAttributes() implicitly syncing with the server
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* so if there was an error naming the pixmap that will have been
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* caught by now. */
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if (clutter_x11_untrap_x_errors ())
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pixmap = None;
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g_object_ref (texture); /* guard against unparent */
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if (pixmap)
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{
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clutter_x11_texture_pixmap_set_pixmap (texture, pixmap);
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priv->owns_pixmap = TRUE;
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}
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clutter_x11_texture_pixmap_set_mapped (texture, mapped);
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/* could do more clever things with a signal, i guess.. */
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if (notify_override_redirect)
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g_object_notify (G_OBJECT (texture), "window-override-redirect");
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if (notify_x)
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g_object_notify (G_OBJECT (texture), "window-x");
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if (notify_y)
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g_object_notify (G_OBJECT (texture), "window-y");
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g_object_unref (texture);
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clutter_x11_untrap_x_errors ();
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}
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}
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