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gdkwindow: Store children list nodes in GdkWindow structure

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This avoids a bunch of allocations, and additionally it has better
cache behaviour, as we don't follow pointers to the separate GList
node memory areas during traversal.

From Christian Hergert:

  This machine is a Retina mac book pro so I've been working on getting
  GtkTextView (GtkPixelCache) up to our performance level on
  X11/Wayland. I'm seeing a jump from about 43 FPS to about 50 FPS.

https://bugzilla.gnome.org/show_bug.cgi?id=754687
This commit is contained in:
Alexander Larsson 2015-09-10 12:57:16 +02:00
parent 0175cd8ae7
commit ea294fd92c
2 changed files with 53 additions and 18 deletions
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2
gdk/gdkinternals.h
View File

@ -212,8 +212,10 @@ struct _GdkWindow
GList *filters;
GList *children;
GList children_list_node;
GList *native_children;
cairo_pattern_t *background;
/* The paint logic here is a bit complex because of our intermingling of

69
gdk/gdkwindow.c
View File

@ -238,6 +238,39 @@ print_region (cairo_region_t *region)
}
#endif
static GList *
list_insert_link_before (GList *list,
GList *sibling,
GList *link)
{
if (list == NULL || sibling == list)
{
link->prev = NULL;
link->next = list;
if (list)
list->prev = link;
return link;
}
else if (sibling == NULL)
{
GList *last = g_list_last (list);
last->next = link;
link->prev = last;
link->next = NULL;
return list;
}
else
{
link->next = sibling;
link->prev = sibling->prev;
sibling->prev = link;
return list;
}
}
static void
gdk_window_init (GdkWindow *window)
{
@ -255,6 +288,7 @@ gdk_window_init (GdkWindow *window)
window->visibility = GDK_VISIBILITY_FULLY_OBSCURED;
/* Default to unobscured since some backends don't send visibility events */
window->native_visibility = GDK_VISIBILITY_UNOBSCURED;
window->children_list_node.data = window;
window->device_cursor = g_hash_table_new_full (NULL, NULL,
NULL, g_object_unref);
@ -1369,7 +1403,7 @@ gdk_window_new (GdkWindow *parent,
window->input_only = TRUE;
}
window->parent->children = g_list_prepend (window->parent->children, window);
window->parent->children = g_list_concat (&window->children_list_node, window->parent->children);
if (window->parent->window_type == GDK_WINDOW_ROOT)
{
@ -1606,7 +1640,7 @@ gdk_window_reparent (GdkWindow *window,
if (old_parent)
{
old_parent->children = g_list_remove (old_parent->children, window);
old_parent->children = g_list_remove_link (old_parent->children, &window->children_list_node);
if (gdk_window_has_impl (window))
old_parent->impl_window->native_children =
@ -1617,7 +1651,7 @@ gdk_window_reparent (GdkWindow *window,
window->x = x;
window->y = y;
new_parent->children = g_list_prepend (new_parent->children, window);
new_parent->children = g_list_concat (&window->children_list_node, new_parent->children);
if (gdk_window_has_impl (window))
new_parent->impl_window->native_children = g_list_prepend (new_parent->impl_window->native_children, window);
@ -1918,7 +1952,6 @@ _gdk_window_destroy_hierarchy (GdkWindow *window,
GdkWindow *temp_window;
GdkScreen *screen;
GdkDisplay *display;
GList *children;
GList *tmp;
g_return_if_fail (GDK_IS_WINDOW (window));
@ -1974,7 +2007,7 @@ _gdk_window_destroy_hierarchy (GdkWindow *window,
if (window->parent)
{
if (window->parent->children)
window->parent->children = g_list_remove (window->parent->children, window);
window->parent->children = g_list_remove_link (window->parent->children, &window->children_list_node);
if (gdk_window_has_impl (window))
window->parent->impl_window->native_children =
@ -2014,8 +2047,9 @@ _gdk_window_destroy_hierarchy (GdkWindow *window,
g_assert (window->children == NULL);
else
{
children = tmp = window->children;
tmp = window->children;
window->children = NULL;
/* No need to free children list, its all made up of in-struct nodes */
while (tmp)
{
@ -2029,7 +2063,6 @@ _gdk_window_destroy_hierarchy (GdkWindow *window,
foreign_destroy);
}
g_list_free (children);
if (gdk_window_has_impl (window))
g_assert (window->native_children == NULL);
@ -4771,8 +4804,8 @@ gdk_window_raise_internal (GdkWindow *window)
if (parent && parent->children->data != window)
{
parent->children = g_list_remove (parent->children, window);
parent->children = g_list_prepend (parent->children, window);
parent->children = g_list_remove_link (parent->children, &window->children_list_node);
parent->children = g_list_concat (&window->children_list_node, parent->children);
did_raise = TRUE;
}
@ -5040,8 +5073,8 @@ gdk_window_lower_internal (GdkWindow *window)
if (parent)
{
parent->children = g_list_remove (parent->children, window);
parent->children = g_list_append (parent->children, window);
parent->children = g_list_remove_link (parent->children, &window->children_list_node);
parent->children = g_list_concat (parent->children, &window->children_list_node);
}
impl_class = GDK_WINDOW_IMPL_GET_CLASS (window->impl);
@ -5208,15 +5241,15 @@ gdk_window_restack (GdkWindow *window,
if (sibling_link == NULL)
return;
parent->children = g_list_remove (parent->children, window);
parent->children = g_list_remove_link (parent->children, &window->children_list_node);
if (above)
parent->children = g_list_insert_before (parent->children,
sibling_link,
window);
parent->children = list_insert_link_before (parent->children,
sibling_link,
&window->children_list_node);
else
parent->children = g_list_insert_before (parent->children,
sibling_link->next,
window);
parent->children = list_insert_link_before (parent->children,
sibling_link->next,
&window->children_list_node);
impl_class = GDK_WINDOW_IMPL_GET_CLASS (window->impl);
if (gdk_window_has_impl (window))