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st-widget: Cache two paint states

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In most cases, we'll transition between two states on hover / focus.
Instead of recalculating and repainting our resources on state change,
simply cache the last state when we transition.

https://bugzilla.gnome.org/show_bug.cgi?id=697274
This commit is contained in:
Jasper St. Pierre
2013-04-04 23:06:29 -04:00
parent db14dc973a
commit a2fcbb7e65
4 changed files with 50 additions and 15 deletions
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45
src/st/st-widget.c
View File

@ -80,7 +80,8 @@ struct _StWidgetPrivate
StWidget *prev_last_child;
StWidget *prev_first_child;
StThemeNodePaintState paint_state;
StThemeNodePaintState paint_states[2];
int current_paint_state : 2;
};
/**
@ -271,6 +272,18 @@ st_widget_remove_transition (StWidget *widget)
}
}
static void
next_paint_state (StWidget *widget)
{
widget->priv->current_paint_state = (widget->priv->current_paint_state + 1) % G_N_ELEMENTS (widget->priv->paint_states);
}
static StThemeNodePaintState *
current_paint_state (StWidget *widget)
{
return &widget->priv->paint_states[widget->priv->current_paint_state];
}
static void
st_widget_texture_cache_changed (StTextureCache *cache,
const char *uri,
@ -304,8 +317,11 @@ st_widget_texture_cache_changed (StTextureCache *cache,
* the paint state. We should probably implement a method to
* the theme node to determine this, but for now, just wipe
* the entire paint state.
*
* Use the existing state instead of a new one because it's
* assumed the rest of the state will stay the same.
*/
st_theme_node_paint_state_invalidate (&actor->priv->paint_state);
st_theme_node_paint_state_invalidate (current_paint_state (actor));
if (CLUTTER_ACTOR_IS_MAPPED (CLUTTER_ACTOR (actor)))
clutter_actor_queue_redraw (CLUTTER_ACTOR (actor));
@ -360,6 +376,7 @@ static void
st_widget_finalize (GObject *gobject)
{
StWidgetPrivate *priv = ST_WIDGET (gobject)->priv;
int i;
g_free (priv->style_class);
g_free (priv->pseudo_class);
@ -367,7 +384,8 @@ st_widget_finalize (GObject *gobject)
g_free (priv->accessible_name);
g_free (priv->inline_style);
st_theme_node_paint_state_free (&priv->paint_state);
for (i = 0; i < G_N_ELEMENTS (priv->paint_states); i++)
st_theme_node_paint_state_init (&priv->paint_states[i]);
G_OBJECT_CLASS (st_widget_parent_class)->finalize (gobject);
}
@ -456,7 +474,7 @@ st_widget_paint_background (StWidget *widget)
opacity);
else
st_theme_node_paint (theme_node,
&widget->priv->paint_state,
current_paint_state (widget),
&allocation,
opacity);
}
@ -1520,6 +1538,7 @@ static void
st_widget_init (StWidget *actor)
{
StWidgetPrivate *priv;
int i;
actor->priv = priv = ST_WIDGET_GET_PRIVATE (actor);
priv->is_stylable = TRUE;
@ -1535,14 +1554,17 @@ st_widget_init (StWidget *actor)
g_signal_connect (st_texture_cache_get_default (), "texture-file-changed",
G_CALLBACK (st_widget_texture_cache_changed), actor);
st_theme_node_paint_state_init (&priv->paint_state);
for (i = 0; i < G_N_ELEMENTS (priv->paint_states); i++)
st_theme_node_paint_state_init (&priv->paint_states[i]);
}
static void
on_transition_completed (StThemeNodeTransition *transition,
StWidget *widget)
{
st_theme_node_paint_state_copy (&widget->priv->paint_state,
next_paint_state (widget);
st_theme_node_paint_state_copy (current_paint_state (widget),
st_theme_node_transition_get_new_paint_state (transition));
st_widget_remove_transition (widget);
@ -1569,7 +1591,7 @@ st_widget_recompute_style (StWidget *widget,
transition_duration = st_theme_node_get_transition_duration (new_theme_node);
paint_equal = old_theme_node && st_theme_node_paint_equal (old_theme_node, new_theme_node);
paint_equal = st_theme_node_paint_equal (old_theme_node, new_theme_node);
g_object_get (gtk_settings_get_default (),
"gtk-enable-animations", &animations_enabled,
@ -1593,7 +1615,7 @@ st_widget_recompute_style (StWidget *widget,
widget->priv->transition_animation =
st_theme_node_transition_new (old_theme_node,
new_theme_node,
&widget->priv->paint_state,
current_paint_state (widget),
transition_duration);
g_signal_connect (widget->priv->transition_animation, "completed",
@ -1610,7 +1632,12 @@ st_widget_recompute_style (StWidget *widget,
}
if (!paint_equal)
st_theme_node_paint_state_invalidate (&widget->priv->paint_state);
{
next_paint_state (widget);
if (!st_theme_node_paint_equal (new_theme_node, current_paint_state (widget)->node))
st_theme_node_paint_state_invalidate (current_paint_state (widget));
}
g_signal_emit (widget, signals[STYLE_CHANGED], 0);
widget->priv->is_style_dirty = FALSE;