static void
meta_window_group_reset_culling (MetaWindowGroup *group)
{
ClutterActor *actor = CLUTTER_ACTOR (group);
ClutterActor *child;
ClutterActorIter iter;
/* Now that we are done painting, unset the visible regions (they will
* mess up painting clones of our actors)
*/
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
if (META_IS_WINDOW_ACTOR (child))
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (child);
meta_window_actor_reset_visible_regions (window_actor);
}
else if (META_IS_BACKGROUND_ACTOR (child))
{
MetaBackgroundActor *background_actor = META_BACKGROUND_ACTOR (child);
meta_background_actor_set_visible_region (background_actor, NULL);
}
}
}
static void
meta_background_actor_cull_out (MetaCullable *cullable,
cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
set_clip_region (self, clip_region);
}
static void
meta_background_actor_dispose (GObject *object)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
set_clip_region (self, NULL);
G_OBJECT_CLASS (meta_background_actor_parent_class)->dispose (object);
}
static gboolean
meta_background_actor_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
MetaBackgroundActorPrivate *priv = self->priv;
int width, height;
meta_screen_get_size (priv->background->screen, &width, &height);
clutter_paint_volume_set_width (volume, width);
clutter_paint_volume_set_height (volume, height);
return TRUE;
}
static void
meta_background_actor_paint (ClutterActor *actor)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
MetaBackgroundActorPrivate *priv = self->priv;
guint8 opacity = clutter_actor_get_paint_opacity (actor);
guint8 color_component;
int width, height;
meta_screen_get_size (priv->background->screen, &width, &height);
color_component = (int)(0.5 + opacity * priv->dim_factor);
cogl_material_set_color4ub (priv->material,
color_component,
color_component,
color_component,
opacity);
cogl_set_source (priv->material);
if (priv->visible_region)
{
int n_rectangles = cairo_region_num_rectangles (priv->visible_region);
int i;
for (i = 0; i < n_rectangles; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (priv->visible_region, i, &rect);
cogl_rectangle_with_texture_coords (rect.x, rect.y,
rect.x + rect.width, rect.y + rect.height,
rect.x / priv->background->texture_width,
rect.y / priv->background->texture_height,
(rect.x + rect.width) / priv->background->texture_width,
(rect.y + rect.height) / priv->background->texture_height);
}
}
else
{
cogl_rectangle_with_texture_coords (0.0f, 0.0f,
width, height,
0.0f, 0.0f,
width / priv->background->texture_width,
height / priv->background->texture_height);
}
}
static void
meta_background_actor_get_preferred_width (ClutterActor *actor,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
MetaBackgroundActorPrivate *priv = self->priv;
int width, height;
meta_screen_get_size (priv->background->screen, &width, &height);
if (min_width_p)
*min_width_p = width;
if (natural_width_p)
*natural_width_p = width;
}
static void
on_monitors_changed (MetaScreen *screen,
MetaPlugin *plugin)
{
MetaDefaultPlugin *self = META_DEFAULT_PLUGIN (plugin);
int i, n;
GRand *rand = g_rand_new_with_seed (123456);
clutter_actor_destroy_all_children (self->priv->background_group);
n = meta_screen_get_n_monitors (screen);
for (i = 0; i < n; i++)
{
MetaRectangle rect;
ClutterActor *background_actor;
MetaBackground *background;
ClutterColor color;
meta_screen_get_monitor_geometry (screen, i, &rect);
background_actor = meta_background_actor_new (screen, i);
clutter_actor_set_position (background_actor, rect.x, rect.y);
clutter_actor_set_size (background_actor, rect.width, rect.height);
/* Don't use rand() here, mesa calls srand() internally when
parsing the driconf XML, but it's nice if the colors are
reproducible.
*/
clutter_color_init (&color,
g_rand_int_range (rand, 0, 255),
g_rand_int_range (rand, 0, 255),
g_rand_int_range (rand, 0, 255),
255);
background = meta_background_new (screen);
meta_background_set_color (background, &color);
meta_background_actor_set_background (META_BACKGROUND_ACTOR (background_actor), background);
g_object_unref (background);
clutter_actor_add_child (self->priv->background_group, background_actor);
}
g_rand_free (rand);
}
static void
meta_background_actor_set_property(GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
switch (prop_id)
{
case PROP_DIM_FACTOR:
meta_background_actor_set_dim_factor (self, g_value_get_float (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_background_actor_get_property(GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
MetaBackgroundActorPrivate *priv = self->priv;
switch (prop_id)
{
case PROP_DIM_FACTOR:
g_value_set_float (value, priv->dim_factor);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_background_actor_dispose (GObject *object)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
MetaBackgroundActorPrivate *priv = self->priv;
meta_background_actor_set_visible_region (self, NULL);
if (priv->background != NULL)
{
priv->background->actors = g_slist_remove (priv->background->actors, self);
priv->background = NULL;
}
if (priv->material != COGL_INVALID_HANDLE)
{
cogl_handle_unref (priv->material);
priv->material = COGL_INVALID_HANDLE;
}
G_OBJECT_CLASS (meta_background_actor_parent_class)->dispose (object);
}
static void
meta_background_actor_dispose (GObject *object)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
MetaBackgroundActorPrivate *priv = self->priv;
meta_background_actor_set_visible_region (self, NULL);
if (priv->background != NULL)
{
priv->background->actors = g_slist_remove (priv->background->actors, self);
priv->background = NULL;
}
if (priv->top_actor != NULL)
priv->top_actor = NULL;
if (priv->bottom_actor != NULL)
priv->bottom_actor = NULL;
G_OBJECT_CLASS (meta_background_actor_parent_class)->dispose (object);
}
static void
meta_window_group_cull_out (MetaWindowGroup *group,
ClutterActor *unredirected_window,
gboolean has_unredirected_window,
cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
ClutterActor *actor = CLUTTER_ACTOR (group);
ClutterActor *child;
ClutterActorIter iter;
/* We walk the list from top to bottom (opposite of painting order),
* and subtract the opaque area of each window out of the visible
* region that we pass to the windows below.
*/
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_prev (&iter, &child))
{
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
if (has_unredirected_window && child == unredirected_window)
continue;
/* If an actor has effects applied, then that can change the area
* it paints and the opacity, so we no longer can figure out what
* portion of the actor is obscured and what portion of the screen
* it obscures, so we skip the actor.
*
* This has a secondary beneficial effect: if a ClutterOffscreenEffect
* is applied to an actor, then our clipped redraws interfere with the
* caching of the FBO - even if we only need to draw a small portion
* of the window right now, ClutterOffscreenEffect may use other portions
* of the FBO later. So, skipping actors with effects applied also
* prevents these bugs.
*
* Theoretically, we should check clutter_actor_get_offscreen_redirect()
* as well for the same reason, but omitted for simplicity in the
* hopes that no-one will do that.
*/
if (clutter_actor_has_effects (child))
continue;
if (META_IS_WINDOW_ACTOR (child))
{
MetaWindowActor *window_actor = META_WINDOW_ACTOR (child);
int x, y;
if (!meta_actor_is_untransformed (CLUTTER_ACTOR (window_actor), &x, &y))
continue;
/* Temporarily move to the coordinate system of the actor */
cairo_region_translate (unobscured_region, - x, - y);
cairo_region_translate (clip_region, - x, - y);
meta_window_actor_set_unobscured_region (window_actor, unobscured_region);
meta_window_actor_set_visible_region (window_actor, clip_region);
if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (window_actor)) == 0xff)
{
cairo_region_t *obscured_region = meta_window_actor_get_obscured_region (window_actor);
if (obscured_region)
{
cairo_region_subtract (unobscured_region, obscured_region);
cairo_region_subtract (clip_region, obscured_region);
}
}
meta_window_actor_set_visible_region_beneath (window_actor, clip_region);
cairo_region_translate (unobscured_region, x, y);
cairo_region_translate (clip_region, x, y);
}
else if (META_IS_BACKGROUND_ACTOR (child))
{
int x, y;
if (!meta_actor_is_untransformed (child, &x, &y))
continue;
cairo_region_translate (clip_region, - x, - y);
meta_background_actor_set_visible_region (META_BACKGROUND_ACTOR (child), clip_region);
cairo_region_translate (clip_region, x, y);
}
}
}
static void
meta_window_group_paint (ClutterActor *actor)
{
cairo_region_t *visible_region;
ClutterActor *stage;
cairo_rectangle_int_t visible_rect;
GList *children, *l;
int paint_x_origin, paint_y_origin;
int actor_x_origin, actor_y_origin;
int paint_x_offset, paint_y_offset;
MetaWindowGroup *window_group = META_WINDOW_GROUP (actor);
MetaCompScreen *info = meta_screen_get_compositor_data (window_group->screen);
/* Normally we expect an actor to be drawn at it's position on the screen.
* However, if we're inside the paint of a ClutterClone, that won't be the
* case and we need to compensate. We look at the position of the window
* group under the current model-view matrix and the position of the actor.
* If they are both simply integer translations, then we can compensate
* easily, otherwise we give up.
*
* Possible cleanup: work entirely in paint space - we can compute the
* combination of the model-view matrix with the local matrix for each child
* actor and get a total transformation for that actor for how we are
* painting currently, and never worry about how actors are positioned
* on the stage.
*/
if (!painting_untransformed (window_group, &paint_x_origin, &paint_y_origin) ||
!meta_actor_is_untransformed (actor, &actor_x_origin, &actor_y_origin))
{
CLUTTER_ACTOR_CLASS (meta_window_group_parent_class)->paint (actor);
return;
}
paint_x_offset = paint_x_origin - actor_x_origin;
paint_y_offset = paint_y_origin - actor_y_origin;
/* We walk the list from top to bottom (opposite of painting order),
* and subtract the opaque area of each window out of the visible
* region that we pass to the windows below.
*/
children = clutter_actor_get_children (actor);
children = g_list_reverse (children);
/* 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);
visible_region = cairo_region_create_rectangle (&visible_rect);
if (info->unredirected_window != NULL)
{
cairo_rectangle_int_t unredirected_rect;
MetaWindow *window = meta_window_actor_get_meta_window (info->unredirected_window);
meta_window_get_outer_rect (window, (MetaRectangle *)&unredirected_rect);
cairo_region_subtract_rectangle (visible_region, &unredirected_rect);
}
for (l = children; l; l = l->next)
{
if (!CLUTTER_ACTOR_IS_VISIBLE (l->data))
continue;
if (l->data == info->unredirected_window)
continue;
/* If an actor has effects applied, then that can change the area
* it paints and the opacity, so we no longer can figure out what
* portion of the actor is obscured and what portion of the screen
* it obscures, so we skip the actor.
*
* This has a secondary beneficial effect: if a ClutterOffscreenEffect
* is applied to an actor, then our clipped redraws interfere with the
* caching of the FBO - even if we only need to draw a small portion
* of the window right now, ClutterOffscreenEffect may use other portions
* of the FBO later. So, skipping actors with effects applied also
* prevents these bugs.
*
* Theoretically, we should check clutter_actor_get_offscreen_redirect()
* as well for the same reason, but omitted for simplicity in the
* hopes that no-one will do that.
*/
if (clutter_actor_has_effects (l->data))
continue;
if (META_IS_WINDOW_ACTOR (l->data))
{
MetaWindowActor *window_actor = l->data;
int x, y;
if (!meta_actor_is_untransformed (CLUTTER_ACTOR (window_actor), &x, &y))
continue;
x += paint_x_offset;
y += paint_y_offset;
/* Temporarily move to the coordinate system of the actor */
cairo_region_translate (visible_region, - x, - y);
meta_window_actor_set_visible_region (window_actor, visible_region);
if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (window_actor)) == 0xff)
{
cairo_region_t *obscured_region = meta_window_actor_get_obscured_region (window_actor);
if (obscured_region)
cairo_region_subtract (visible_region, obscured_region);
}
meta_window_actor_set_visible_region_beneath (window_actor, visible_region);
cairo_region_translate (visible_region, x, y);
}
else if (META_IS_BACKGROUND_ACTOR (l->data) ||
META_IS_BACKGROUND_GROUP (l->data))
{
ClutterActor *background_actor = l->data;
int x, y;
if (!meta_actor_is_untransformed (CLUTTER_ACTOR (background_actor), &x, &y))
continue;
x += paint_x_offset;
y += paint_y_offset;
cairo_region_translate (visible_region, - x, - y);
if (META_IS_BACKGROUND_GROUP (background_actor))
meta_background_group_set_visible_region (META_BACKGROUND_GROUP (background_actor), visible_region);
else
meta_background_actor_set_visible_region (META_BACKGROUND_ACTOR (background_actor), visible_region);
cairo_region_translate (visible_region, x, y);
}
}
cairo_region_destroy (visible_region);
CLUTTER_ACTOR_CLASS (meta_window_group_parent_class)->paint (actor);
/* Now that we are done painting, unset the visible regions (they will
* mess up painting clones of our actors)
*/
for (l = children; l; l = l->next)
{
if (META_IS_WINDOW_ACTOR (l->data))
{
MetaWindowActor *window_actor = l->data;
meta_window_actor_reset_visible_regions (window_actor);
}
else if (META_IS_BACKGROUND_ACTOR (l->data))
{
MetaBackgroundActor *background_actor = l->data;
meta_background_actor_set_visible_region (background_actor, NULL);
}
}
g_list_free (children);
}
static void
meta_background_actor_reset_culling (MetaCullable *cullable)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
set_clip_region (self, NULL);
}
