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2008-07-17 Emmanuele Bassi <ebassi@openedhand.com>

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* clutter/subclassing-ClutterActor.xml: Update the ClutterActor
	subclassing section by removing the cogl_push/pop_matrix() calls
	where not needed.
This commit is contained in:
Emmanuele Bassi 2008-07-17 10:40:19 +00:00
parent e33cce309a
commit 1742dd6750
2 changed files with 10 additions and 17 deletions
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6
doc/reference/ChangeLog
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@ -1,3 +1,9 @@
2008-07-17 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/subclassing-ClutterActor.xml: Update the ClutterActor
subclassing section by removing the cogl_push/pop_matrix() calls
where not needed.
2008-07-10 Emmanuele Bassi <ebassi@openedhand.com>
* clutter/clutter-sections.txt: Add the missing X11 backend

21
doc/reference/clutter/subclassing-ClutterActor.xml
View File

@ -334,7 +334,9 @@ foo_actor_allocate (ClutterActor *actor,
using the GL or GLES API.</para>
<note><para>Actors performing transformations should push the GL matrix
first and then pop the GL matrix before returning.</para></note>
first and then pop the GL matrix before returning. COGL provides wrapper
functions for this operation, cogl_push_matrix() and cogl_pop_matrix().
</para></note>
<example id="simple-actor-paint-example">
<title>Paint implementation of a simple actor</title>
@ -350,8 +352,6 @@ foo_actor_paint (ClutterActor *actor)
ClutterColor color = { 0, };
ClutterUnit w, h, r;
cogl_push_matrix ();
/* FooActor has a specific background color */
color.red = foo_actor-&gt;bg_color.red;
color.green = foo_actor-&gt;bg_color.green;
@ -383,8 +383,6 @@ foo_actor_paint (ClutterActor *actor)
/* and fill it with the current color */
cogl_fill ();
cogl_pop_matrix ();
}
</programlisting>
</example>
@ -401,10 +399,7 @@ foo_actor_paint (ClutterActor *actor)
<example id="container-actor-paint-example">
<title>Paint implementation of a container</title>
<para>In this example, <classname>FooActor</classname> is a simple
container invoking clutter_actor_paint() on every visible child. To
allow transformations on itself to affect the children, the GL modelview
matrix is pushed at the beginning of the paint sequence, and the popped
at the end.</para>
container invoking clutter_actor_paint() on every visible child.</para>
<programlisting>
static void
foo_actor_paint (ClutterActor *actor)
@ -412,8 +407,6 @@ foo_actor_paint (ClutterActor *actor)
FooActor *foo_actor = FOO_ACTOR (actor);
GList *child;
cogl_push_matrix ();
for (child = foo_actor-&gt;children;
child != NULL;
child = child-&gt;next)
@ -424,8 +417,6 @@ foo_actor_paint (ClutterActor *actor)
if (CLUTTER_ACTOR_IS_VISIBLE (child_actor))
clutter_actor_paint (child_actor);
}
cogl_pop_matrix ();
}
</programlisting>
</example>
@ -462,8 +453,6 @@ foo_actor_pick (ClutterActor *actor,
/* this is the arc radius for the rounded rectangle corners */
r = CLUTTER_UNITS_TO_FIXED (foo_actor->radius);
cogl_push_matrix ();
/* use the passed color to paint ourselves */
cogl_color (pick_color);
@ -472,8 +461,6 @@ foo_actor_pick (ClutterActor *actor,
/* and fill it with the current color */
cogl_fill ();
cogl_pop_matrix ();
}
</programlisting>
</example>