8182c978db
This uses CVDisplayLink to drive the GdkFrameClock. A GdkWindow can register a frame callback to thaw their frame clock as necessary based on the next notification from CVDisplayLink. CVDisplayLink notifies us on a high-priority thread. We use the same NSEventas gdkeventloop-quartz.c to wakeup the main loop. This is done so that we don’t pathologically wake up the select thread to then continue notifying the main loop. We use an embedded GList node in the GdkWindowImplQuartz so that we can avoid allocating any lists or arrays for pending frame callbacks. Compare this to the same design in GdkWindow for children.
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* gdkdisplaylinksource.h
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*
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* Copyright (C) 2015 Christian Hergert <christian@hergert.me>
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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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* Authors:
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* Christian Hergert <christian@hergert.me>
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*/
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#ifndef GDK_DISPLAY_LINK_SOURCE_H
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#define GDK_DISPLAY_LINK_SOURCE_H
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#include <glib.h>
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#include <QuartzCore/QuartzCore.h>
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G_BEGIN_DECLS
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typedef struct
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{
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GSource source;
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CVDisplayLinkRef display_link;
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gint64 refresh_interval;
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volatile gint64 presentation_time;
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volatile guint needs_dispatch;
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} GdkDisplayLinkSource;
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GSource *gdk_display_link_source_new (void);
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void gdk_display_link_source_pause (GdkDisplayLinkSource *source);
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void gdk_display_link_source_unpause (GdkDisplayLinkSource *source);
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G_END_DECLS
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#endif /* GDK_DISPLAY_LINK_SOURCE_H */
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