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224280be22
Instead of asking all backends to do that for us, we can call ClutterStageWindow::redraw ourselves by default. This changeset fixes all backends to actually do the right thing, and move the stage implementation redraw inside the ClutterStageWindow implementation itself.
697 lines
24 KiB
C
697 lines
24 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 void clutter_event_translator_iface_init (ClutterEventTranslatorIface *iface);
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static ClutterStageWindowIface *clutter_stage_window_parent_iface = NULL;
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static ClutterEventTranslatorIface *clutter_event_translator_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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G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_EVENT_TRANSLATOR,
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clutter_event_translator_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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ClutterBackend *backend = clutter_get_default_backend ();
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
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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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/* 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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clutter_x11_trap_x_errors ();
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if (stage_glx->glxwin != None)
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{
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glXDestroyWindow (backend_x11->xdpy, stage_glx->glxwin);
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stage_glx->glxwin = None;
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}
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_clutter_stage_x11_destroy_window_untrapped (stage_x11);
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XSync (backend_x11->xdpy, False);
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clutter_x11_untrap_x_errors ();
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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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ClutterBackendX11 *backend_x11;
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ClutterBackendGLX *backend_glx;
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ClutterBackend *backend;
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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_get_default_backend ();
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backend_glx = CLUTTER_BACKEND_GLX (backend);
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backend_x11 = CLUTTER_BACKEND_X11 (backend);
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if (!_clutter_stage_x11_create_window (stage_x11))
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return FALSE;
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if (stage_glx->glxwin == None)
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{
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int major;
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int minor;
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GLXFBConfig config;
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/* Try and create a GLXWindow to use with extensions dependent on
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* GLX versions >= 1.3 that don't accept regular X Windows as GLX
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* drawables.
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*/
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if (glXQueryVersion (backend_x11->xdpy, &major, &minor) &&
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major == 1 && minor >= 3 &&
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_clutter_backend_glx_get_fbconfig (backend_glx, &config))
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{
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stage_glx->glxwin = glXCreateWindow (backend_x11->xdpy,
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config,
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stage_x11->xwin,
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NULL);
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}
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}
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#ifdef GLX_INTEL_swap_event
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if (clutter_feature_available (CLUTTER_FEATURE_SWAP_EVENTS))
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{
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GLXDrawable drawable = stage_glx->glxwin
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? stage_glx->glxwin
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: stage_x11->xwin;
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/* we unconditionally select this event because we rely on it to
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* advance the master clock, and drive redraw/relayout, animations
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* and event handling.
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*/
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glXSelectEvent (backend_x11->xdpy,
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drawable,
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GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK);
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}
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#endif /* GLX_INTEL_swap_event */
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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. Some heuristics are used to decide when a clipped redraw
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* should be promoted into a full stage redraw.
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*
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* Currently we simply check that the bounding box height is < 300
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* pixels.
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*
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* XXX: we don't have any empirical data telling us what a sensible
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* thresholds is!
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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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*/
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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, 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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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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#ifdef HAVE_DRM
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static int
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drm_wait_vblank(int fd, drm_wait_vblank_t *vbl)
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{
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int ret, rc;
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do
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{
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ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
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vbl->request.type &= ~_DRM_VBLANK_RELATIVE;
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rc = errno;
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}
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while (ret && rc == EINTR);
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return rc;
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}
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#endif /* HAVE_DRM */
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static void
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wait_for_vblank (ClutterBackendGLX *backend_glx)
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{
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if (backend_glx->vblank_type == CLUTTER_VBLANK_NONE)
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return;
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if (backend_glx->wait_video_sync)
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{
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unsigned int retraceCount;
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CLUTTER_NOTE (BACKEND, "Waiting for vblank (wait_video_sync)");
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backend_glx->get_video_sync (&retraceCount);
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backend_glx->wait_video_sync (2,
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(retraceCount + 1) % 2,
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&retraceCount);
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}
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else
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{
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#ifdef HAVE_DRM
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drm_wait_vblank_t blank;
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CLUTTER_NOTE (BACKEND, "Waiting for vblank (drm)");
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blank.request.type = _DRM_VBLANK_RELATIVE;
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blank.request.sequence = 1;
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blank.request.signal = 0;
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drm_wait_vblank (backend_glx->dri_fd, &blank);
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#else
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CLUTTER_NOTE (BACKEND, "No vblank mechanism found");
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#endif /* HAVE_DRM */
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}
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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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ClutterBackendX11 *backend_x11;
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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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GLXDrawable drawable;
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unsigned int video_sync_count;
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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_x11 = stage_x11->backend;
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backend_glx = CLUTTER_BACKEND_GLX (backend_x11);
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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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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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_clutter_stage_do_paint (stage_x11->wrapper, NULL);
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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);
|
|
cogl_set_modelview_matrix (&modelview);
|
|
cogl_set_source (outline);
|
|
cogl_vertex_buffer_draw (vbo, COGL_VERTICES_MODE_LINE_LOOP,
|
|
0 , 4);
|
|
cogl_pop_matrix ();
|
|
cogl_object_unref (vbo);
|
|
}
|
|
|
|
cogl_flush ();
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, painting_timer);
|
|
|
|
drawable = stage_glx->glxwin
|
|
? stage_glx->glxwin
|
|
: stage_x11->xwin;
|
|
|
|
/* If we might ever use _clutter_backend_glx_blit_sub_buffer then we
|
|
* always need to keep track of the video_sync_count so that we can
|
|
* throttle blits.
|
|
*
|
|
* Note: we get the count *before* we issue any glXCopySubBuffer or
|
|
* blit_sub_buffer request in case the count would go up before
|
|
* returning control to us.
|
|
*/
|
|
if (backend_glx->can_blit_sub_buffer && backend_glx->get_video_sync)
|
|
backend_glx->get_video_sync (&video_sync_count);
|
|
|
|
/* push on the screen */
|
|
if (use_clipped_redraw)
|
|
{
|
|
ClutterGeometry *clip = &stage_glx->bounding_redraw_clip;
|
|
ClutterGeometry copy_area;
|
|
ClutterActor *actor;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"_glx_blit_sub_buffer (window: 0x%lx, "
|
|
"x: %d, y: %d, "
|
|
"width: %d, height: %d)",
|
|
(unsigned long) drawable,
|
|
stage_glx->bounding_redraw_clip.x,
|
|
stage_glx->bounding_redraw_clip.y,
|
|
stage_glx->bounding_redraw_clip.width,
|
|
stage_glx->bounding_redraw_clip.height);
|
|
|
|
/* XXX: It seems there will be a race here in that the stage
|
|
* window may be resized before glXCopySubBufferMESA 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.y = clutter_actor_get_height (actor)
|
|
- clip->y
|
|
- clip->height;
|
|
copy_area.x = clip->x;
|
|
copy_area.width = clip->width;
|
|
copy_area.height = clip->height;
|
|
|
|
/* glXCopySubBufferMESA and glBlitFramebuffer are not integrated
|
|
* with the glXSwapIntervalSGI mechanism which we usually use to
|
|
* throttle the Clutter framerate to the vertical refresh and so
|
|
* we have to manually wait for the vblank period...
|
|
*/
|
|
|
|
/* Here 'is_synchronized' only means that the blit won't cause a
|
|
* tear, ie it won't prevent multiple blits per retrace if they
|
|
* can all be performed in the blanking period. If that's the
|
|
* case then we still want to use the vblank sync menchanism but
|
|
* we only need it to throttle redraws.
|
|
*/
|
|
if (!backend_glx->blit_sub_buffer_is_synchronized)
|
|
{
|
|
/* XXX: note that glXCopySubBuffer, at least for Intel, is
|
|
* synchronized with the vblank but glBlitFramebuffer may
|
|
* not be so we use the same scheme we do when calling
|
|
* glXSwapBuffers without the swap_control extension and
|
|
* call glFinish () before waiting for the vblank period.
|
|
*
|
|
* See where we call glXSwapBuffers for more details.
|
|
*/
|
|
glFinish ();
|
|
wait_for_vblank (backend_glx);
|
|
}
|
|
else if (backend_glx->get_video_sync)
|
|
{
|
|
/* If we have the GLX_SGI_video_sync extension then we can
|
|
* be a bit smarter about how we throttle blits by avoiding
|
|
* any waits if we can see that the video sync count has
|
|
* already progressed. */
|
|
if (backend_glx->last_video_sync_count == video_sync_count)
|
|
wait_for_vblank (backend_glx);
|
|
}
|
|
else
|
|
wait_for_vblank (backend_glx);
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
_clutter_backend_glx_blit_sub_buffer (backend_glx,
|
|
drawable,
|
|
copy_area.x,
|
|
copy_area.y,
|
|
copy_area.width,
|
|
copy_area.height);
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, blit_sub_buffer_timer);
|
|
}
|
|
else
|
|
{
|
|
CLUTTER_NOTE (BACKEND, "glXSwapBuffers (display: %p, window: 0x%lx)",
|
|
backend_x11->xdpy,
|
|
(unsigned long) drawable);
|
|
|
|
/* If we have GLX swap buffer events then glXSwapBuffers 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++;
|
|
|
|
if (backend_glx->vblank_type != CLUTTER_VBLANK_GLX_SWAP &&
|
|
backend_glx->vblank_type != CLUTTER_VBLANK_NONE)
|
|
{
|
|
/* If we are going to wait for VBLANK manually, we not only
|
|
* need to flush out pending drawing to the GPU before we
|
|
* sleep, we need to wait for it to finish. Otherwise, we
|
|
* may end up with the situation:
|
|
*
|
|
* - We finish drawing - GPU drawing continues
|
|
* - We go to sleep - GPU drawing continues
|
|
* VBLANK - We call glXSwapBuffers - GPU drawing continues
|
|
* - GPU drawing continues
|
|
* - Swap buffers happens
|
|
*
|
|
* Producing a tear. Calling glFinish() first will cause us
|
|
* to properly wait for the next VBLANK before we swap. This
|
|
* obviously does not happen when we use _GLX_SWAP and let
|
|
* the driver do the right thing
|
|
*/
|
|
glFinish ();
|
|
|
|
wait_for_vblank (backend_glx);
|
|
}
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, swapbuffers_timer);
|
|
glXSwapBuffers (backend_x11->xdpy, drawable);
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, swapbuffers_timer);
|
|
|
|
_cogl_swap_buffers_notify ();
|
|
}
|
|
|
|
backend_glx->last_video_sync_count = video_sync_count;
|
|
|
|
/* reset the redraw clipping for the next paint... */
|
|
stage_glx->initialized_redraw_clip = FALSE;
|
|
|
|
stage_glx->frame_count++;
|
|
}
|
|
|
|
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;
|
|
|
|
/* the rest is inherited from ClutterStageX11 */
|
|
}
|
|
|
|
static ClutterTranslateReturn
|
|
clutter_stage_glx_translate_event (ClutterEventTranslator *translator,
|
|
gpointer native,
|
|
ClutterEvent *event)
|
|
{
|
|
#ifdef GLX_INTEL_swap_event
|
|
ClutterBackendGLX *backend_glx;
|
|
XEvent *xevent = native;
|
|
|
|
backend_glx = CLUTTER_BACKEND_GLX (clutter_get_default_backend ());
|
|
|
|
if (xevent->type == (backend_glx->event_base + GLX_BufferSwapComplete))
|
|
{
|
|
ClutterStageX11 *stage_x11 = CLUTTER_STAGE_X11 (translator);
|
|
ClutterStageGLX *stage_glx = CLUTTER_STAGE_GLX (translator);
|
|
GLXBufferSwapComplete *swap_complete_event;
|
|
|
|
swap_complete_event = (GLXBufferSwapComplete *) xevent;
|
|
|
|
if (stage_x11->xwin == swap_complete_event->drawable)
|
|
{
|
|
/* Early versions of the swap_event implementation in Mesa
|
|
* deliver BufferSwapComplete event when not selected for,
|
|
* so if we get a swap event we aren't expecting, just ignore it.
|
|
*
|
|
* https://bugs.freedesktop.org/show_bug.cgi?id=27962
|
|
*/
|
|
if (stage_glx->pending_swaps > 0)
|
|
stage_glx->pending_swaps--;
|
|
|
|
return CLUTTER_TRANSLATE_REMOVE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* chain up to the common X11 implementation */
|
|
return clutter_event_translator_parent_iface->translate_event (translator,
|
|
native,
|
|
event);
|
|
}
|
|
|
|
static void
|
|
clutter_event_translator_iface_init (ClutterEventTranslatorIface *iface)
|
|
{
|
|
clutter_event_translator_parent_iface = g_type_interface_peek_parent (iface);
|
|
|
|
iface->translate_event = clutter_stage_glx_translate_event;
|
|
}
|