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2008-09-23 Emmanuele Bassi <ebassi@linux.intel.com>

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* clutter/clutter-alpha.c:
	(clutter_alpha_get_alpha): Do not return the cached value but
	just compute the current alpha value. The use case is pretty
	much straightforward: stop a timeline, advance it, and retrieve
	the alpha value before starting the timeline to adjust an
	animation dependent on the alpha. Caching the alpha value is
	not needed because the behaviours will always pass the alpha
	value inside the ::alpha-notify virtual function anyway, so
	there is no need for them to call clutter_alpha_get_alpha().

	This change makes it also possible to reliably unit-test
	ClutterAlpha.

	(timeline_new_frame_cb): Call clutter_alpha_get_alpha().
This commit is contained in:
Emmanuele Bassi 2008-09-23 09:41:08 +00:00
parent 6b51ac4b77
commit 73adac987d
2 changed files with 55 additions and 35 deletions
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17
ChangeLog
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@ -1,3 +1,20 @@
2008-09-23 Emmanuele Bassi <ebassi@linux.intel.com>
* clutter/clutter-alpha.c:
(clutter_alpha_get_alpha): Do not return the cached value but
just compute the current alpha value. The use case is pretty
much straightforward: stop a timeline, advance it, and retrieve
the alpha value before starting the timeline to adjust an
animation dependent on the alpha. Caching the alpha value is
not needed because the behaviours will always pass the alpha
value inside the ::alpha-notify virtual function anyway, so
there is no need for them to call clutter_alpha_get_alpha().
This change makes it also possible to reliably unit-test
ClutterAlpha.
(timeline_new_frame_cb): Call clutter_alpha_get_alpha().
2008-09-23 Tomas Frydrych <tf@linux.intel.com>
* clutter/clutter-main.c:

73
clutter/clutter-alpha.c
View File

@ -92,32 +92,8 @@ timeline_new_frame_cb (ClutterTimeline *timeline,
ClutterAlphaPrivate *priv = alpha->priv;
/* Update alpha value and notify */
if (G_LIKELY (priv->closure))
{
GValue params = { 0, };
GValue result_value = { 0, };
g_object_ref (alpha);
g_value_init (&result_value, G_TYPE_UINT);
g_value_init (&params, CLUTTER_TYPE_ALPHA);
g_value_set_object (&params, alpha);
g_closure_invoke (priv->closure,
&result_value,
1,
&params,
NULL);
priv->alpha = g_value_get_uint (&result_value);
g_value_unset (&result_value);
g_value_unset (&params);
g_object_notify (G_OBJECT (alpha), "alpha");
g_object_unref (alpha);
}
priv->alpha = clutter_alpha_get_alpha (alpha);
g_object_notify (G_OBJECT (alpha), "alpha");
}
static void
@ -175,9 +151,7 @@ clutter_alpha_finalize (GObject *object)
ClutterAlphaPrivate *priv = CLUTTER_ALPHA (object)->priv;
if (priv->closure)
{
g_closure_unref (priv->closure);
}
g_closure_unref (priv->closure);
G_OBJECT_CLASS (clutter_alpha_parent_class)->finalize (object);
}
@ -258,9 +232,40 @@ clutter_alpha_init (ClutterAlpha *self)
guint32
clutter_alpha_get_alpha (ClutterAlpha *alpha)
{
g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), FALSE);
return alpha->priv->alpha;
ClutterAlphaPrivate *priv;
guint32 retval = 0;
g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), 0);
priv = alpha->priv;
if (G_LIKELY (priv->closure))
{
GValue params = { 0, };
GValue result_value = { 0, };
g_object_ref (alpha);
g_value_init (&result_value, G_TYPE_UINT);
g_value_init (&params, CLUTTER_TYPE_ALPHA);
g_value_set_object (&params, alpha);
g_closure_invoke (priv->closure,
&result_value,
1,
&params,
NULL);
retval = g_value_get_uint (&result_value);
g_value_unset (&result_value);
g_value_unset (&params);
g_object_unref (alpha);
}
return retval;
}
/**
@ -318,13 +323,11 @@ clutter_alpha_set_func (ClutterAlpha *alpha,
gpointer data,
GDestroyNotify destroy)
{
ClutterAlphaPrivate *priv;
GClosure *closure;
g_return_if_fail (CLUTTER_IS_ALPHA (alpha));
g_return_if_fail (func != NULL);
priv = alpha->priv;
closure = g_cclosure_new (G_CALLBACK (func), data, (GClosureNotify) destroy);
clutter_alpha_set_closure (alpha, closure);
}