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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* SECTION:meta-background-group
* @title: MetaBackgroundGroup
* @short_description: Container for background actors
*
* This class is a subclass of ClutterActor with special handling for
* MetaBackgroundActor/MetaBackgroundGroup when painting children.
* It makes sure to only draw the parts of the backgrounds not
* occluded by opaque windows.
*
* See #MetaWindowGroup for more information behind the motivation,
* and details on implementation.
*/
#include "config.h"
#include "compositor/meta-cullable.h"
#include "meta/meta-background-group.h"
static void cullable_iface_init (MetaCullableInterface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaBackgroundGroup, meta_background_group, CLUTTER_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
static void
meta_background_group_class_init (MetaBackgroundGroupClass *klass)
{
}
static void
meta_background_group_cull_out (MetaCullable *cullable,
cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
meta_cullable_cull_out_children (cullable, unobscured_region, clip_region);
}
static void
meta_background_group_reset_culling (MetaCullable *cullable)
{
meta_cullable_reset_culling_children (cullable);
}
static void
cullable_iface_init (MetaCullableInterface *iface)
{
iface->cull_out = meta_background_group_cull_out;
iface->reset_culling = meta_background_group_reset_culling;
}
static void
meta_background_group_init (MetaBackgroundGroup *self)
{
}
ClutterActor *
meta_background_group_new (void)
{
MetaBackgroundGroup *background_group;
background_group = g_object_new (META_TYPE_BACKGROUND_GROUP, NULL);
return CLUTTER_ACTOR (background_group);
}
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