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meta-window-group: Use clutter_stage_get_redraw_clip_bounds

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Clutter now has some API to get the bounds of the current redraw clip
so Mutter no longer needs to make direct GL calls to get the scissor
rect. This should make it more robust against Cogl or Clutter changing
how it does the clipping.

https://bugzilla.gnome.org/show_bug.cgi?id=654551
This commit is contained in:
Neil Roberts 2011-07-13 14:01:05 +01:00
parent cd7a968093
commit 4167ef870c
2 changed files with 13 additions and 37 deletions
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2
configure.in
View File

@ -185,7 +185,7 @@ else
AC_MSG_ERROR([no. Mutter requires the Xcomposite extension to build.])
fi
CLUTTER_VERSION=1.2.0
CLUTTER_VERSION=1.7.5
CLUTTER_PACKAGE=clutter-1.0
AC_SUBST(CLUTTER_PACKAGE)
if $PKG_CONFIG --atleast-version $CLUTTER_VERSION $CLUTTER_PACKAGE ; then

48
src/compositor/meta-window-group.c
View File

@ -103,11 +103,9 @@ actor_is_untransformed (ClutterActor *actor,
static void
meta_window_group_paint (ClutterActor *actor)
{
MetaWindowGroup *window_group = META_WINDOW_GROUP (actor);
cairo_region_t *visible_region;
GLboolean scissor_test;
cairo_rectangle_int_t screen_rect = { 0 };
cairo_rectangle_int_t scissor_rect;
ClutterActor *stage;
cairo_rectangle_int_t visible_rect;
GList *children, *l;
/* We walk the list from top to bottom (opposite of painting order),
@ -117,39 +115,17 @@ meta_window_group_paint (ClutterActor *actor)
children = clutter_container_get_children (CLUTTER_CONTAINER (actor));
children = g_list_reverse (children);
/* Start off with the full screen area (for a multihead setup, we
* might want to use a more accurate union of the monitors to avoid
* painting in holes from mismatched monitor sizes. That's just an
* optimization, however.)
*/
meta_screen_get_size (window_group->screen, &screen_rect.width, &screen_rect.height);
/* Get the clipped redraw bounds from Clutter so that we can avoid
* painting shadows on windows that don't need to be painted in this
* frame. In the case of a multihead setup with mismatched monitor
* sizes, we could intersect this with an accurate union of the
* monitors to avoid painting shadows that are visible only in the
* holes. */
stage = clutter_actor_get_stage (actor);
clutter_stage_get_redraw_clip_bounds (CLUTTER_STAGE (stage),
&visible_rect);
/* When doing a partial stage paint, Clutter will set the GL scissor
* box to the clip rectangle for the partial repaint. We combine the screen
* rectangle with the scissor box to get the region we need to
* paint. (Strangely, the scissor box sometimes seems to be bigger
* than the stage ... Clutter should probably be clampimg)
*/
glGetBooleanv (GL_SCISSOR_TEST, &scissor_test);
if (scissor_test)
{
GLint scissor_box[4];
glGetIntegerv (GL_SCISSOR_BOX, scissor_box);
scissor_rect.x = scissor_box[0];
scissor_rect.y = screen_rect.height - (scissor_box[1] + scissor_box[3]);
scissor_rect.width = scissor_box[2];
scissor_rect.height = scissor_box[3];
gdk_rectangle_intersect (&scissor_rect, &screen_rect, &scissor_rect);
}
else
{
scissor_rect = screen_rect;
}
visible_region = cairo_region_create_rectangle (&scissor_rect);
visible_region = cairo_region_create_rectangle (&visible_rect);
for (l = children; l; l = l->next)
{