gtk/gdk/gdkoffscreenwindow.c
Matthias Clasen 075661d376 generic damage generation for offscreen windows
Generating damage from gdk drawing api doesn't help for cairo rendering
...and the gdk drawing api is gone anyway. Bug 621571
2010-08-10 21:02:30 +02:00

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22 KiB
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2005. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include <math.h>
#include "gdk.h"
#include "gdkwindow.h"
#include "gdkinternals.h"
#include "gdkwindowimpl.h"
#include "gdkpixmap.h"
#include "gdkdrawable.h"
#include "gdktypes.h"
#include "gdkscreen.h"
#include "gdkcolor.h"
#include "gdkcursor.h"
/* LIMITATIONS:
*
* Offscreen windows can't be the child of a foreign window,
* nor contain foreign windows
* GDK_POINTER_MOTION_HINT_MASK isn't effective
*/
typedef struct _GdkOffscreenWindow GdkOffscreenWindow;
typedef struct _GdkOffscreenWindowClass GdkOffscreenWindowClass;
struct _GdkOffscreenWindow
{
GdkDrawable parent_instance;
GdkWindow *wrapper;
GdkCursor *cursor;
GdkColormap *colormap;
GdkScreen *screen;
GdkPixmap *pixmap;
GdkWindow *embedder;
};
struct _GdkOffscreenWindowClass
{
GdkDrawableClass parent_class;
};
#define GDK_TYPE_OFFSCREEN_WINDOW (gdk_offscreen_window_get_type())
#define GDK_OFFSCREEN_WINDOW(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_OFFSCREEN_WINDOW, GdkOffscreenWindow))
#define GDK_IS_OFFSCREEN_WINDOW(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_OFFSCREEN_WINDOW))
#define GDK_OFFSCREEN_WINDOW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_OFFSCREEN_WINDOW, GdkOffscreenWindowClass))
#define GDK_IS_OFFSCREEN_WINDOW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_OFFSCREEN_WINDOW))
#define GDK_OFFSCREEN_WINDOW_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_OFFSCREEN_WINDOW, GdkOffscreenWindowClass))
static void gdk_offscreen_window_impl_iface_init (GdkWindowImplIface *iface);
static void gdk_offscreen_window_hide (GdkWindow *window);
G_DEFINE_TYPE_WITH_CODE (GdkOffscreenWindow,
gdk_offscreen_window,
GDK_TYPE_DRAWABLE,
G_IMPLEMENT_INTERFACE (GDK_TYPE_WINDOW_IMPL,
gdk_offscreen_window_impl_iface_init));
static void
gdk_offscreen_window_finalize (GObject *object)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (object);
if (offscreen->cursor)
gdk_cursor_unref (offscreen->cursor);
offscreen->cursor = NULL;
g_object_unref (offscreen->pixmap);
G_OBJECT_CLASS (gdk_offscreen_window_parent_class)->finalize (object);
}
static void
gdk_offscreen_window_init (GdkOffscreenWindow *window)
{
}
static void
gdk_offscreen_window_destroy (GdkWindow *window,
gboolean recursing,
gboolean foreign_destroy)
{
GdkWindowObject *private = GDK_WINDOW_OBJECT (window);
GdkOffscreenWindow *offscreen;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
gdk_offscreen_window_set_embedder (window, NULL);
if (!recursing)
gdk_offscreen_window_hide (window);
g_object_unref (offscreen->colormap);
offscreen->colormap = NULL;
}
static gboolean
is_parent_of (GdkWindow *parent,
GdkWindow *child)
{
GdkWindow *w;
w = child;
while (w != NULL)
{
if (w == parent)
return TRUE;
w = gdk_window_get_parent (w);
}
return FALSE;
}
static cairo_surface_t *
gdk_offscreen_window_ref_cairo_surface (GdkDrawable *drawable)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
return _gdk_drawable_ref_cairo_surface (offscreen->pixmap);
}
static GdkColormap*
gdk_offscreen_window_get_colormap (GdkDrawable *drawable)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
return offscreen->colormap;
}
static void
gdk_offscreen_window_set_colormap (GdkDrawable *drawable,
GdkColormap*colormap)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
if (colormap && GDK_WINDOW_DESTROYED (offscreen->wrapper))
return;
if (offscreen->colormap == colormap)
return;
if (offscreen->colormap)
g_object_unref (offscreen->colormap);
offscreen->colormap = colormap;
if (offscreen->colormap)
g_object_ref (offscreen->colormap);
}
static gint
gdk_offscreen_window_get_depth (GdkDrawable *drawable)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
return gdk_drawable_get_depth (offscreen->wrapper);
}
static GdkDrawable *
gdk_offscreen_window_get_source_drawable (GdkDrawable *drawable)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
return _gdk_drawable_get_source_drawable (offscreen->pixmap);
}
static GdkScreen*
gdk_offscreen_window_get_screen (GdkDrawable *drawable)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
return offscreen->screen;
}
static GdkVisual*
gdk_offscreen_window_get_visual (GdkDrawable *drawable)
{
GdkOffscreenWindow *offscreen = GDK_OFFSCREEN_WINDOW (drawable);
return gdk_drawable_get_visual (offscreen->wrapper);
}
void
_gdk_offscreen_window_new (GdkWindow *window,
GdkScreen *screen,
GdkVisual *visual,
GdkWindowAttr *attributes,
gint attributes_mask)
{
GdkWindowObject *private;
GdkOffscreenWindow *offscreen;
g_return_if_fail (attributes != NULL);
if (attributes->wclass != GDK_INPUT_OUTPUT)
return; /* Can't support input only offscreens */
private = (GdkWindowObject *)window;
if (private->parent != NULL && GDK_WINDOW_DESTROYED (private->parent))
return;
private->impl = g_object_new (GDK_TYPE_OFFSCREEN_WINDOW, NULL);
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
offscreen->wrapper = window;
offscreen->screen = screen;
if (attributes_mask & GDK_WA_COLORMAP)
offscreen->colormap = g_object_ref (attributes->colormap);
else
{
if (gdk_screen_get_system_visual (screen) == visual)
{
offscreen->colormap = gdk_screen_get_system_colormap (screen);
g_object_ref (offscreen->colormap);
}
else
offscreen->colormap = gdk_colormap_new (visual, FALSE);
}
offscreen->pixmap = gdk_pixmap_new ((GdkDrawable *)private->parent,
private->width,
private->height,
private->depth);
gdk_drawable_set_colormap (offscreen->pixmap, offscreen->colormap);
}
static gboolean
gdk_offscreen_window_reparent (GdkWindow *window,
GdkWindow *new_parent,
gint x,
gint y)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkWindowObject *new_parent_private = (GdkWindowObject *)new_parent;
GdkWindowObject *old_parent;
gboolean was_mapped;
if (new_parent)
{
/* No input-output children of input-only windows */
if (new_parent_private->input_only && !private->input_only)
return FALSE;
/* Don't create loops in hierarchy */
if (is_parent_of (window, new_parent))
return FALSE;
}
was_mapped = GDK_WINDOW_IS_MAPPED (window);
gdk_window_hide (window);
if (private->parent)
private->parent->children = g_list_remove (private->parent->children, window);
old_parent = private->parent;
private->parent = new_parent_private;
private->x = x;
private->y = y;
if (new_parent_private)
private->parent->children = g_list_prepend (private->parent->children, window);
_gdk_synthesize_crossing_events_for_geometry_change (window);
if (old_parent)
_gdk_synthesize_crossing_events_for_geometry_change (GDK_WINDOW (old_parent));
return was_mapped;
}
static void
from_embedder (GdkWindow *window,
double embedder_x, double embedder_y,
double *offscreen_x, double *offscreen_y)
{
GdkWindowObject *private;
private = (GdkWindowObject *)window;
g_signal_emit_by_name (private->impl_window,
"from-embedder",
embedder_x, embedder_y,
offscreen_x, offscreen_y,
NULL);
}
static void
to_embedder (GdkWindow *window,
double offscreen_x, double offscreen_y,
double *embedder_x, double *embedder_y)
{
GdkWindowObject *private;
private = (GdkWindowObject *)window;
g_signal_emit_by_name (private->impl_window,
"to-embedder",
offscreen_x, offscreen_y,
embedder_x, embedder_y,
NULL);
}
static gint
gdk_offscreen_window_get_root_coords (GdkWindow *window,
gint x,
gint y,
gint *root_x,
gint *root_y)
{
GdkWindowObject *private = GDK_WINDOW_OBJECT (window);
GdkOffscreenWindow *offscreen;
int tmpx, tmpy;
tmpx = x;
tmpy = y;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
if (offscreen->embedder)
{
double dx, dy;
to_embedder (window,
x, y,
&dx, &dy);
tmpx = floor (dx + 0.5);
tmpy = floor (dy + 0.5);
gdk_window_get_root_coords (offscreen->embedder,
tmpx, tmpy,
&tmpx, &tmpy);
}
if (root_x)
*root_x = tmpx;
if (root_y)
*root_y = tmpy;
return TRUE;
}
static gint
gdk_offscreen_window_get_deskrelative_origin (GdkWindow *window,
gint *x,
gint *y)
{
GdkWindowObject *private = GDK_WINDOW_OBJECT (window);
GdkOffscreenWindow *offscreen;
int tmpx, tmpy;
tmpx = 0;
tmpy = 0;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
if (offscreen->embedder)
{
double dx, dy;
gdk_window_get_deskrelative_origin (offscreen->embedder,
&tmpx, &tmpy);
to_embedder (window,
0, 0,
&dx, &dy);
tmpx = floor (tmpx + dx + 0.5);
tmpy = floor (tmpy + dy + 0.5);
}
if (x)
*x = tmpx;
if (y)
*y = tmpy;
return TRUE;
}
static gboolean
gdk_offscreen_window_get_device_state (GdkWindow *window,
GdkDevice *device,
gint *x,
gint *y,
GdkModifierType *mask)
{
GdkWindowObject *private = GDK_WINDOW_OBJECT (window);
GdkOffscreenWindow *offscreen;
int tmpx, tmpy;
double dtmpx, dtmpy;
GdkModifierType tmpmask;
tmpx = 0;
tmpy = 0;
tmpmask = 0;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
if (offscreen->embedder != NULL)
{
gdk_window_get_device_position (offscreen->embedder, device, &tmpx, &tmpy, &tmpmask);
from_embedder (window,
tmpx, tmpy,
&dtmpx, &dtmpy);
tmpx = floor (dtmpx + 0.5);
tmpy = floor (dtmpy + 0.5);
}
if (x)
*x = tmpx;
if (y)
*y = tmpy;
if (mask)
*mask = tmpmask;
return TRUE;
}
/**
* gdk_offscreen_window_get_pixmap:
* @window: a #GdkWindow
*
* Gets the offscreen pixmap that an offscreen window renders into.
* If you need to keep this around over window resizes, you need to
* add a reference to it.
*
* Returns: The offscreen pixmap, or %NULL if not offscreen
*
* Since: 2.18
*/
GdkPixmap *
gdk_offscreen_window_get_pixmap (GdkWindow *window)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkOffscreenWindow *offscreen;
g_return_val_if_fail (GDK_IS_WINDOW (window), FALSE);
if (!GDK_IS_OFFSCREEN_WINDOW (private->impl))
return NULL;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
return offscreen->pixmap;
}
static void
gdk_offscreen_window_raise (GdkWindow *window)
{
/* gdk_window_raise already changed the stacking order */
_gdk_synthesize_crossing_events_for_geometry_change (window);
}
static void
gdk_offscreen_window_lower (GdkWindow *window)
{
/* gdk_window_lower already changed the stacking order */
_gdk_synthesize_crossing_events_for_geometry_change (window);
}
static void
gdk_offscreen_window_move_resize_internal (GdkWindow *window,
gint x,
gint y,
gint width,
gint height,
gboolean send_expose_events)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkOffscreenWindow *offscreen;
gint dx, dy, dw, dh;
GdkPixmap *old_pixmap;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
if (width < 1)
width = 1;
if (height < 1)
height = 1;
if (private->destroyed)
return;
dx = x - private->x;
dy = y - private->y;
dw = width - private->width;
dh = height - private->height;
private->x = x;
private->y = y;
if (private->width != width ||
private->height != height)
{
cairo_t *cr;
private->width = width;
private->height = height;
old_pixmap = offscreen->pixmap;
offscreen->pixmap = gdk_pixmap_new (GDK_DRAWABLE (old_pixmap),
width,
height,
private->depth);
cr = gdk_cairo_create (offscreen->pixmap);
gdk_cairo_set_source_pixmap (cr, old_pixmap, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
}
if (GDK_WINDOW_IS_MAPPED (private))
{
// TODO: Only invalidate new area, i.e. for larger windows
gdk_window_invalidate_rect (window, NULL, TRUE);
_gdk_synthesize_crossing_events_for_geometry_change (window);
}
}
static void
gdk_offscreen_window_move_resize (GdkWindow *window,
gboolean with_move,
gint x,
gint y,
gint width,
gint height)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkOffscreenWindow *offscreen;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
if (!with_move)
{
x = private->x;
y = private->y;
}
if (width < 0)
width = private->width;
if (height < 0)
height = private->height;
gdk_offscreen_window_move_resize_internal (window, x, y,
width, height,
TRUE);
}
static void
gdk_offscreen_window_show (GdkWindow *window,
gboolean already_mapped)
{
GdkWindowObject *private = (GdkWindowObject *)window;
gdk_window_clear_area_e (window, 0, 0,
private->width, private->height);
}
static void
gdk_offscreen_window_hide (GdkWindow *window)
{
GdkWindowObject *private;
GdkOffscreenWindow *offscreen;
GdkDisplay *display;
g_return_if_fail (window != NULL);
private = (GdkWindowObject*) window;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
/* May need to break grabs on children */
display = gdk_drawable_get_display (window);
/* TODO: This needs updating to the new grab world */
#if 0
if (display->pointer_grab.window != NULL)
{
if (is_parent_of (window, display->pointer_grab.window))
{
/* Call this ourselves, even though gdk_display_pointer_ungrab
does so too, since we want to pass implicit == TRUE so the
broken grab event is generated */
_gdk_display_unset_has_pointer_grab (display,
TRUE,
FALSE,
GDK_CURRENT_TIME);
gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
}
}
#endif
}
static void
gdk_offscreen_window_withdraw (GdkWindow *window)
{
}
static GdkEventMask
gdk_offscreen_window_get_events (GdkWindow *window)
{
return 0;
}
static void
gdk_offscreen_window_set_events (GdkWindow *window,
GdkEventMask event_mask)
{
}
static void
gdk_offscreen_window_set_background (GdkWindow *window,
const GdkColor *color)
{
GdkWindowObject *private = (GdkWindowObject *)window;
private->bg_color = *color;
if (private->bg_pixmap &&
private->bg_pixmap != GDK_PARENT_RELATIVE_BG &&
private->bg_pixmap != GDK_NO_BG)
g_object_unref (private->bg_pixmap);
private->bg_pixmap = NULL;
}
static void
gdk_offscreen_window_set_back_pixmap (GdkWindow *window,
GdkPixmap *pixmap)
{
GdkWindowObject *private = (GdkWindowObject *)window;
if (pixmap &&
private->bg_pixmap != GDK_PARENT_RELATIVE_BG &&
private->bg_pixmap != GDK_NO_BG &&
!gdk_drawable_get_colormap (pixmap))
{
g_warning ("gdk_window_set_back_pixmap(): pixmap must have a colormap");
return;
}
if (private->bg_pixmap &&
private->bg_pixmap != GDK_PARENT_RELATIVE_BG &&
private->bg_pixmap != GDK_NO_BG)
g_object_unref (private->bg_pixmap);
private->bg_pixmap = pixmap;
if (pixmap &&
private->bg_pixmap != GDK_PARENT_RELATIVE_BG &&
private->bg_pixmap != GDK_NO_BG)
g_object_ref (pixmap);
}
static void
gdk_offscreen_window_shape_combine_region (GdkWindow *window,
const cairo_region_t *shape_region,
gint offset_x,
gint offset_y)
{
}
static void
gdk_offscreen_window_input_shape_combine_region (GdkWindow *window,
const cairo_region_t *shape_region,
gint offset_x,
gint offset_y)
{
}
static gboolean
gdk_offscreen_window_set_static_gravities (GdkWindow *window,
gboolean use_static)
{
return TRUE;
}
static void
gdk_offscreen_window_get_geometry (GdkWindow *window,
gint *x,
gint *y,
gint *width,
gint *height,
gint *depth)
{
GdkWindowObject *private = (GdkWindowObject *)window;
g_return_if_fail (window == NULL || GDK_IS_WINDOW (window));
if (!GDK_WINDOW_DESTROYED (window))
{
if (x)
*x = private->x;
if (y)
*y = private->y;
if (width)
*width = private->width;
if (height)
*height = private->height;
if (depth)
*depth = private->depth;
}
}
static gboolean
gdk_offscreen_window_queue_antiexpose (GdkWindow *window,
cairo_region_t *area)
{
return FALSE;
}
static void
gdk_offscreen_window_translate (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy)
{
cairo_surface_t *surface;
cairo_t *cr;
/* Can't use gdk_cairo_create here due to clipping */
surface = _gdk_drawable_ref_cairo_surface (window);
cr = cairo_create (surface);
cairo_surface_destroy (surface);
area = cairo_region_copy (area);
gdk_cairo_region (cr, area);
cairo_clip (cr);
/* NB: This is a self-copy and Cairo doesn't support that yet.
* So we do a litle trick.
*/
cairo_push_group (cr);
gdk_cairo_set_source_pixmap (cr, window, dx, dy);
cairo_paint (cr);
cairo_pop_group_to_source (cr);
cairo_paint (cr);
cairo_destroy (cr);
_gdk_window_add_damage (window, area);
}
/**
* gdk_offscreen_window_set_embedder:
* @window: a #GdkWindow
* @embedder: the #GdkWindow that @window gets embedded in
*
* Sets @window to be embedded in @embedder.
*
* To fully embed an offscreen window, in addition to calling this
* function, it is also necessary to handle the #GdkWindow::pick-embedded-child
* signal on the @embedder and the #GdkWindow::to-embedder and
* #GdkWindow::from-embedder signals on @window.
*
* Since: 2.18
*/
void
gdk_offscreen_window_set_embedder (GdkWindow *window,
GdkWindow *embedder)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkOffscreenWindow *offscreen;
g_return_if_fail (GDK_IS_WINDOW (window));
if (!GDK_IS_OFFSCREEN_WINDOW (private->impl))
return;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
if (embedder)
{
g_object_ref (embedder);
GDK_WINDOW_OBJECT (embedder)->num_offscreen_children++;
}
if (offscreen->embedder)
{
g_object_unref (offscreen->embedder);
GDK_WINDOW_OBJECT (offscreen->embedder)->num_offscreen_children--;
}
offscreen->embedder = embedder;
}
/**
* gdk_offscreen_window_get_embedder:
* @window: a #GdkWindow
*
* Gets the window that @window is embedded in.
*
* Returns: the embedding #GdkWindow, or %NULL if @window is not an
* embedded offscreen window
*
* Since: 2.18
*/
GdkWindow *
gdk_offscreen_window_get_embedder (GdkWindow *window)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkOffscreenWindow *offscreen;
g_return_val_if_fail (GDK_IS_WINDOW (window), NULL);
if (!GDK_IS_OFFSCREEN_WINDOW (private->impl))
return NULL;
offscreen = GDK_OFFSCREEN_WINDOW (private->impl);
return offscreen->embedder;
}
static void
gdk_offscreen_window_class_init (GdkOffscreenWindowClass *klass)
{
GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_offscreen_window_finalize;
drawable_class->ref_cairo_surface = gdk_offscreen_window_ref_cairo_surface;
drawable_class->set_colormap = gdk_offscreen_window_set_colormap;
drawable_class->get_colormap = gdk_offscreen_window_get_colormap;
drawable_class->get_depth = gdk_offscreen_window_get_depth;
drawable_class->get_screen = gdk_offscreen_window_get_screen;
drawable_class->get_visual = gdk_offscreen_window_get_visual;
drawable_class->get_source_drawable = gdk_offscreen_window_get_source_drawable;
}
static void
gdk_offscreen_window_impl_iface_init (GdkWindowImplIface *iface)
{
iface->show = gdk_offscreen_window_show;
iface->hide = gdk_offscreen_window_hide;
iface->withdraw = gdk_offscreen_window_withdraw;
iface->raise = gdk_offscreen_window_raise;
iface->lower = gdk_offscreen_window_lower;
iface->move_resize = gdk_offscreen_window_move_resize;
iface->set_background = gdk_offscreen_window_set_background;
iface->set_back_pixmap = gdk_offscreen_window_set_back_pixmap;
iface->get_events = gdk_offscreen_window_get_events;
iface->set_events = gdk_offscreen_window_set_events;
iface->reparent = gdk_offscreen_window_reparent;
iface->get_geometry = gdk_offscreen_window_get_geometry;
iface->shape_combine_region = gdk_offscreen_window_shape_combine_region;
iface->input_shape_combine_region = gdk_offscreen_window_input_shape_combine_region;
iface->set_static_gravities = gdk_offscreen_window_set_static_gravities;
iface->queue_antiexpose = gdk_offscreen_window_queue_antiexpose;
iface->translate = gdk_offscreen_window_translate;
iface->get_root_coords = gdk_offscreen_window_get_root_coords;
iface->get_deskrelative_origin = gdk_offscreen_window_get_deskrelative_origin;
iface->get_device_state = gdk_offscreen_window_get_device_state;
iface->destroy = gdk_offscreen_window_destroy;
}