mutter/src/wayland/meta-wayland-region.c

/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/*
 * Copyright (C) 2014 Endless Mobile
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * Written by:
 *     Jasper St. Pierre <jstpierre@mecheye.net>
 */

#include "config.h"

#include "meta-wayland-region.h"

struct _MetaWaylandRegion
{
  struct wl_resource *resource;
  cairo_region_t *region;
};

static void
wl_region_destroy (struct wl_client *client,
                   struct wl_resource *resource)
{
  wl_resource_destroy (resource);
}

static void
wl_region_add (struct wl_client *client,
               struct wl_resource *resource,
               gint32 x,
               gint32 y,
               gint32 width,
               gint32 height)
{
  MetaWaylandRegion *region = wl_resource_get_user_data (resource);
  cairo_rectangle_int_t rectangle = { x, y, width, height };

  cairo_region_union_rectangle (region->region, &rectangle);
}

static void
wl_region_subtract (struct wl_client *client,
                    struct wl_resource *resource,
                    gint32 x,
                    gint32 y,
                    gint32 width,
                    gint32 height)
{
  MetaWaylandRegion *region = wl_resource_get_user_data (resource);
  cairo_rectangle_int_t rectangle = { x, y, width, height };

  cairo_region_subtract_rectangle (region->region, &rectangle);
}

static const struct wl_region_interface meta_wayland_wl_region_interface = {
  wl_region_destroy,
  wl_region_add,
  wl_region_subtract
};

static void
wl_region_destructor (struct wl_resource *resource)
{
  MetaWaylandRegion *region = wl_resource_get_user_data (resource);

  cairo_region_destroy (region->region);
  g_slice_free (MetaWaylandRegion, region);
}

MetaWaylandRegion *
meta_wayland_region_create (MetaWaylandCompositor *compositor,
                            struct wl_client      *client,
                            struct wl_resource    *compositor_resource,
                            guint32                id)
{
  MetaWaylandRegion *region = g_slice_new0 (MetaWaylandRegion);

  region->resource = wl_resource_create (client, &wl_region_interface, wl_resource_get_version (compositor_resource), id);
  wl_resource_set_implementation (region->resource, &meta_wayland_wl_region_interface, region, wl_region_destructor);

  region->region = cairo_region_create ();

  return region;
}

cairo_region_t *
meta_wayland_region_peek_cairo_region (MetaWaylandRegion *region)
{
  return region->region;
}