4d3bf09e60
This extends cogl_onscreen_x11_set_foreign_xid to take a callback to a function that details the event mask the Cogl requires the application to select on foreign windows. This is required because Cogl, for example, needs to track size changes of a window and may also in the future want other notifications such as map/unmap. Most applications wont need to use the foreign xwindow apis, but those that do are required to pass a valid callback and update the event mask of their window according to Cogl's requirements.
542 lines
19 KiB
C
542 lines
19 KiB
C
/* Clutter.
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* An OpenGL based 'interactive canvas' library.
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* Authored By Matthew Allum <mallum@openedhand.com>
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* Copyright (C) 2006-2007 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-backend-glx.h"
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#include "clutter-stage-glx.h"
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#include "clutter-glx.h"
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#include "clutter-profile.h"
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#include "clutter-actor-private.h"
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#include "clutter-debug.h"
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#include "clutter-device-manager.h"
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#include "clutter-event.h"
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#include "clutter-enum-types.h"
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#include "clutter-feature.h"
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#include "clutter-main.h"
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#include "clutter-private.h"
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#include "clutter-stage-private.h"
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#include "cogl/cogl.h"
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#include <GL/glx.h>
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#include <GL/gl.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <errno.h>
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#ifdef HAVE_DRM
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#include <drm.h>
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#endif
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static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
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static ClutterStageWindowIface *clutter_stage_window_parent_iface = NULL;
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#define clutter_stage_glx_get_type _clutter_stage_glx_get_type
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G_DEFINE_TYPE_WITH_CODE (ClutterStageGLX,
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clutter_stage_glx,
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CLUTTER_TYPE_STAGE_X11,
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G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_STAGE_WINDOW,
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clutter_stage_window_iface_init));
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static void
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clutter_stage_glx_unrealize (ClutterStageWindow *stage_window)
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{
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
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/* Note unrealize should free up any backend stage related resources */
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CLUTTER_NOTE (BACKEND, "Unrealizing GLX stage [%p]", stage_glx);
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/* chain up to the StageX11 implementation */
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clutter_stage_window_parent_iface->unrealize (stage_window);
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cogl_object_unref (stage_glx->onscreen);
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stage_glx->onscreen = NULL;
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}
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static void
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handle_swap_complete_cb (CoglFramebuffer *framebuffer,
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void *user_data)
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{
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ClutterStageGLX *stage_glx = user_data;
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/* Early versions of the swap_event implementation in Mesa
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* deliver BufferSwapComplete event when not selected for,
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* so if we get a swap event we aren't expecting, just ignore it.
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*
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* https://bugs.freedesktop.org/show_bug.cgi?id=27962
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*
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* FIXME: This issue can be hidden inside Cogl so we shouldn't
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* need to care about this bug here.
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*/
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if (stage_glx->pending_swaps > 0)
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stage_glx->pending_swaps--;
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}
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static gboolean
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clutter_stage_glx_realize (ClutterStageWindow *stage_window)
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{
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ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (stage_window);
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
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ClutterBackend *backend;
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CoglFramebuffer *framebuffer;
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GError *error = NULL;
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gfloat width;
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gfloat height;
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const char *clutter_vblank;
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CLUTTER_NOTE (ACTOR, "Realizing stage '%s' [%p]",
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G_OBJECT_TYPE_NAME (stage_window),
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stage_window);
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backend = CLUTTER_BACKEND (stage_x11->backend);
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clutter_actor_get_size (CLUTTER_ACTOR (stage_x11->wrapper), &width, &height);
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stage_glx->onscreen = cogl_onscreen_new (backend->cogl_context,
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width, height);
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if (stage_x11->xwin != None)
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{
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cogl_onscreen_x11_set_foreign_window_xid (
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stage_glx->onscreen,
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stage_x11->xwin,
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_clutter_stage_x11_update_foreign_event_mask,
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stage_x11);
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}
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clutter_vblank = _clutter_backend_glx_get_vblank ();
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if (clutter_vblank && strcmp (clutter_vblank, "none") == 0)
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cogl_onscreen_set_swap_throttled (stage_glx->onscreen, FALSE);
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framebuffer = COGL_FRAMEBUFFER (stage_glx->onscreen);
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if (!cogl_framebuffer_allocate (framebuffer, &error))
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{
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g_warning ("Failed to allocate stage: %s", error->message);
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g_error_free (error);
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cogl_object_unref (stage_glx->onscreen);
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stage_glx->onscreen = NULL;
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return FALSE;
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}
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if (stage_x11->xwin == None)
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stage_x11->xwin = cogl_onscreen_x11_get_window_xid (stage_glx->onscreen);
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if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_BUFFERS_EVENT))
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{
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stage_glx->swap_callback_id =
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cogl_framebuffer_add_swap_buffers_callback (framebuffer,
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handle_swap_complete_cb,
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stage_glx);
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}
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/* chain up to the StageX11 implementation */
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return clutter_stage_window_parent_iface->realize (stage_window);
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}
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static int
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clutter_stage_glx_get_pending_swaps (ClutterStageWindow *stage_window)
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{
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
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return stage_glx->pending_swaps;
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}
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static void
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clutter_stage_glx_class_init (ClutterStageGLXClass *klass)
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{
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}
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static void
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clutter_stage_glx_init (ClutterStageGLX *stage)
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{
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}
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static gboolean
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clutter_stage_glx_has_redraw_clips (ClutterStageWindow *stage_window)
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{
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
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/* NB: at the start of each new frame there is an implied clip that
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* clips everything (i.e. nothing would be drawn) so we need to make
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* sure we return True in the un-initialized case here.
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*
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* NB: a clip width of 0 means a full stage redraw has been queued
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* so we effectively don't have any redraw clips in that case.
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*/
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if (!stage_glx->initialized_redraw_clip ||
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(stage_glx->initialized_redraw_clip &&
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stage_glx->bounding_redraw_clip.width != 0))
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return TRUE;
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else
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return FALSE;
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}
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static gboolean
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clutter_stage_glx_ignoring_redraw_clips (ClutterStageWindow *stage_window)
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{
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
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/* NB: a clip width of 0 means a full stage redraw is required */
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if (stage_glx->initialized_redraw_clip &&
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stage_glx->bounding_redraw_clip.width == 0)
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return TRUE;
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else
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return FALSE;
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}
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/* A redraw clip represents (in stage coordinates) the bounding box of
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* something that needs to be redraw. Typically they are added to the
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* StageWindow as a result of clutter_actor_queue_clipped_redraw() by
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* actors such as ClutterGLXTexturePixmap. All redraw clips are
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* discarded after the next paint.
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*
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* A NULL stage_clip means the whole stage needs to be redrawn.
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*
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* What we do with this information:
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* - we keep track of the bounding box for all redraw clips
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* - when we come to redraw; if the bounding box is smaller than the
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* stage we scissor the redraw to that box and use
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* GLX_MESA_copy_sub_buffer to present the redraw to the front
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* buffer.
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*
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* XXX - In theory, we should have some sort of heuristics to promote
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* a clipped redraw to a full screen redraw; in reality, it turns out
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* that promotion is fairly expensive. See the Clutter bug described
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* at: http://bugzilla.clutter-project.org/show_bug.cgi?id=2136 .
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*
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* TODO - we should use different heuristics depending on whether the
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* framebuffer is on screen and not redirected by a compositor VS
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* offscreen (either due to compositor redirection or because we are
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* rendering to a CoglOffscreen framebuffer)
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*
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* When not redirected glXCopySubBuffer (on intel hardware at least)
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* will block the GPU until the vertical trace is at the optimal point
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* so the copy can be done without tearing. In this case we don't want
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* to copy tall regions because they increase the average time spent
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* blocking the GPU.
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*
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* When rendering offscreen (CoglOffscreen or redirected by
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* compositor) then no extra synchronization is needed before the copy
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* can start.
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*
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* In all cases we need to consider that glXCopySubBuffer implies a
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* blit which may be avoided by promoting to a full stage redraw if:
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* - the framebuffer is redirected offscreen or a CoglOffscreen.
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* - the framebuffer is onscreen and fullscreen.
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* By promoting to a full stage redraw we trade off the cost involved
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* in rasterizing the extra pixels vs avoiding to use a blit to
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* present the back buffer.
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*/
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static void
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clutter_stage_glx_add_redraw_clip (ClutterStageWindow *stage_window,
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ClutterGeometry *stage_clip)
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{
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ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
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/* If we are already forced to do a full stage redraw then bail early */
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if (clutter_stage_glx_ignoring_redraw_clips (stage_window))
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return;
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/* A NULL stage clip means a full stage redraw has been queued and
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* we keep track of this by setting a zero width
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* stage_glx->bounding_redraw_clip */
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if (stage_clip == NULL)
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{
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stage_glx->bounding_redraw_clip.width = 0;
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stage_glx->initialized_redraw_clip = TRUE;
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return;
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}
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/* Ignore requests to add degenerate/empty clip rectangles */
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if (stage_clip->width == 0 || stage_clip->height == 0)
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return;
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if (!stage_glx->initialized_redraw_clip)
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{
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stage_glx->bounding_redraw_clip.x = stage_clip->x;
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stage_glx->bounding_redraw_clip.y = stage_clip->y;
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stage_glx->bounding_redraw_clip.width = stage_clip->width;
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stage_glx->bounding_redraw_clip.height = stage_clip->height;
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}
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else if (stage_glx->bounding_redraw_clip.width > 0)
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{
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clutter_geometry_union (&stage_glx->bounding_redraw_clip,
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stage_clip,
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&stage_glx->bounding_redraw_clip);
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}
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#if 0
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redraw_area = (stage_glx->bounding_redraw_clip.width *
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stage_glx->bounding_redraw_clip.height);
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stage_area = stage_x11->xwin_width * stage_x11->xwin_height;
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/* Redrawing and blitting >70% of the stage is assumed to be more
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* expensive than redrawing the additional 30% to avoid the blit.
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*
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* FIXME: This threshold was plucked out of thin air!
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*
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* The threshold has been disabled after verifying that it indeed
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* made redraws more expensive than intended; see bug reference:
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*
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* http://bugzilla.clutter-project.org/show_bug.cgi?id=2136
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*/
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if (redraw_area > (stage_area * 0.7f))
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{
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g_print ("DEBUG: clipped redraw too big, forcing full redraw\n");
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/* Set a zero width clip to force a full redraw */
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stage_glx->bounding_redraw_clip.width = 0;
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}
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#endif
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stage_glx->initialized_redraw_clip = TRUE;
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}
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static void
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clutter_stage_glx_redraw (ClutterStageWindow *stage_window)
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{
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ClutterBackendGLX *backend_glx;
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ClutterStageX11 *stage_x11;
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ClutterStageGLX *stage_glx;
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gboolean may_use_clipped_redraw;
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gboolean use_clipped_redraw;
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CLUTTER_STATIC_TIMER (painting_timer,
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"Redrawing", /* parent */
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"Painting actors",
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"The time spent painting actors",
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0 /* no application private data */);
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CLUTTER_STATIC_TIMER (swapbuffers_timer,
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"Redrawing", /* parent */
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"glXSwapBuffers",
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"The time spent blocked by glXSwapBuffers",
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0 /* no application private data */);
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CLUTTER_STATIC_TIMER (blit_sub_buffer_timer,
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"Redrawing", /* parent */
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"glx_blit_sub_buffer",
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"The time spent in _glx_blit_sub_buffer",
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0 /* no application private data */);
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stage_x11 = CLUTTER_STAGE_X11 (stage_window);
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if (stage_x11->xwin == None)
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return;
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stage_glx = CLUTTER_STAGE_GLX (stage_window);
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backend_glx = CLUTTER_BACKEND_GLX (stage_x11->backend);
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CLUTTER_TIMER_START (_clutter_uprof_context, painting_timer);
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if (G_LIKELY (backend_glx->can_blit_sub_buffer) &&
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/* NB: a zero width redraw clip == full stage redraw */
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stage_glx->bounding_redraw_clip.width != 0 &&
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/* some drivers struggle to get going and produce some junk
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* frames when starting up... */
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G_LIKELY (stage_glx->frame_count > 3) &&
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/* While resizing a window clipped redraws are disabled to avoid
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* artefacts. See clutter-event-x11.c:event_translate for a
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* detailed explanation */
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G_LIKELY (stage_x11->clipped_redraws_cool_off == 0))
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{
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may_use_clipped_redraw = TRUE;
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}
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else
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may_use_clipped_redraw = FALSE;
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if (may_use_clipped_redraw &&
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G_LIKELY (!(clutter_paint_debug_flags &
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CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS)))
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use_clipped_redraw = TRUE;
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else
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use_clipped_redraw = FALSE;
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if (use_clipped_redraw)
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{
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CLUTTER_NOTE (CLIPPING,
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"Stage clip pushed: x=%d, y=%d, width=%d, height=%d\n",
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stage_glx->bounding_redraw_clip.x,
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stage_glx->bounding_redraw_clip.y,
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stage_glx->bounding_redraw_clip.width,
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stage_glx->bounding_redraw_clip.height);
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cogl_clip_push_window_rectangle (stage_glx->bounding_redraw_clip.x,
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stage_glx->bounding_redraw_clip.y,
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stage_glx->bounding_redraw_clip.width,
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stage_glx->bounding_redraw_clip.height);
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_clutter_stage_do_paint (stage_x11->wrapper,
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&stage_glx->bounding_redraw_clip);
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cogl_clip_pop ();
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}
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else
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{
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CLUTTER_NOTE (CLIPPING, "Unclipped stage paint\n");
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/* If we are trying to debug redraw issues then we want to pass
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* the bounding_redraw_clip so it can be visualized */
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if (G_UNLIKELY (clutter_paint_debug_flags &
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CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS) &&
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may_use_clipped_redraw)
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{
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_clutter_stage_do_paint (stage_x11->wrapper,
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&stage_glx->bounding_redraw_clip);
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}
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else
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_clutter_stage_do_paint (stage_x11->wrapper, NULL);
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}
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if (may_use_clipped_redraw &&
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G_UNLIKELY ((clutter_paint_debug_flags & CLUTTER_DEBUG_REDRAWS)))
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{
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static CoglMaterial *outline = NULL;
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ClutterGeometry *clip = &stage_glx->bounding_redraw_clip;
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ClutterActor *actor = CLUTTER_ACTOR (stage_x11->wrapper);
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CoglHandle vbo;
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float x_1 = clip->x;
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float x_2 = clip->x + clip->width;
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float y_1 = clip->y;
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float y_2 = clip->y + clip->height;
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float quad[8] = {
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x_1, y_1,
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x_2, y_1,
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x_2, y_2,
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x_1, y_2
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};
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CoglMatrix modelview;
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if (outline == NULL)
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{
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outline = cogl_material_new ();
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cogl_material_set_color4ub (outline, 0xff, 0x00, 0x00, 0xff);
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}
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vbo = cogl_vertex_buffer_new (4);
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cogl_vertex_buffer_add (vbo,
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"gl_Vertex",
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2, /* n_components */
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COGL_ATTRIBUTE_TYPE_FLOAT,
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FALSE, /* normalized */
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0, /* stride */
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quad);
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cogl_vertex_buffer_submit (vbo);
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cogl_push_matrix ();
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cogl_matrix_init_identity (&modelview);
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_clutter_actor_apply_modelview_transform (actor, &modelview);
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cogl_set_modelview_matrix (&modelview);
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cogl_set_source (outline);
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cogl_vertex_buffer_draw (vbo, COGL_VERTICES_MODE_LINE_LOOP,
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0 , 4);
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cogl_pop_matrix ();
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cogl_object_unref (vbo);
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}
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CLUTTER_TIMER_STOP (_clutter_uprof_context, painting_timer);
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/* push on the screen */
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if (use_clipped_redraw)
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{
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ClutterGeometry *clip = &stage_glx->bounding_redraw_clip;
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int copy_area[4];
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ClutterActor *actor;
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/* XXX: It seems there will be a race here in that the stage
|
|
* window may be resized before the cogl_framebuffer_swap_region
|
|
* is handled and so we may copy the wrong region. I can't
|
|
* really see how we can handle this with the current state of X
|
|
* but at least in this case a full redraw should be queued by
|
|
* the resize anyway so it should only exhibit temporary
|
|
* artefacts.
|
|
*/
|
|
|
|
actor = CLUTTER_ACTOR (stage_x11->wrapper);
|
|
|
|
copy_area[0] = clip->x;
|
|
copy_area[1] = clutter_actor_get_height (actor) - clip->y - clip->height;
|
|
copy_area[2] = clip->width;
|
|
copy_area[3] = clip->height;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"cogl_framebuffer_swap_region (onscreen: %p, "
|
|
"x: %d, y: %d, "
|
|
"width: %d, height: %d)",
|
|
stage_glx->onscreen,
|
|
copy_area[0], copy_area[1], copy_area[2], copy_area[3]);
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
|
|
cogl_framebuffer_swap_region (COGL_FRAMEBUFFER (stage_glx->onscreen),
|
|
copy_area, 1);
|
|
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
}
|
|
else
|
|
{
|
|
CLUTTER_NOTE (BACKEND, "cogl_framebuffer_swap_buffers (onscreen: %p)",
|
|
stage_glx->onscreen);
|
|
|
|
/* If we have swap buffer events then
|
|
* cogl_framebuffer_swap_buffers will return immediately and we
|
|
* need to track that there is a swap in progress... */
|
|
if (clutter_feature_available (CLUTTER_FEATURE_SWAP_EVENTS))
|
|
stage_glx->pending_swaps++;
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, swapbuffers_timer);
|
|
cogl_framebuffer_swap_buffers (COGL_FRAMEBUFFER (stage_glx->onscreen));
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, swapbuffers_timer);
|
|
}
|
|
|
|
/* reset the redraw clipping for the next paint... */
|
|
stage_glx->initialized_redraw_clip = FALSE;
|
|
|
|
stage_glx->frame_count++;
|
|
}
|
|
|
|
static CoglFramebuffer *
|
|
clutter_stage_glx_get_active_framebuffer (ClutterStageWindow *stage_window)
|
|
{
|
|
ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (stage_window);
|
|
|
|
return COGL_FRAMEBUFFER (stage_glx->onscreen);
|
|
}
|
|
|
|
static void
|
|
clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
|
|
{
|
|
clutter_stage_window_parent_iface = g_type_interface_peek_parent (iface);
|
|
|
|
iface->realize = clutter_stage_glx_realize;
|
|
iface->unrealize = clutter_stage_glx_unrealize;
|
|
iface->get_pending_swaps = clutter_stage_glx_get_pending_swaps;
|
|
|
|
iface->add_redraw_clip = clutter_stage_glx_add_redraw_clip;
|
|
iface->has_redraw_clips = clutter_stage_glx_has_redraw_clips;
|
|
iface->ignoring_redraw_clips = clutter_stage_glx_ignoring_redraw_clips;
|
|
iface->redraw = clutter_stage_glx_redraw;
|
|
iface->get_active_framebuffer = clutter_stage_glx_get_active_framebuffer;
|
|
|
|
/* the rest is inherited from ClutterStageX11 */
|
|
}
|