5d702853b8
If your OpenGL driver supports GLX_INTEL_swap_event that means when glXSwapBuffers is called it returns immediatly and an XEvent is sent when the actual swap has finished. Clutter can use the events that notify swap completion as a means to throttle rendering in the master clock without blocking the CPU and so it should help improve the performance of CPU bound applications.
100 lines
3.4 KiB
C
100 lines
3.4 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __CLUTTER_BACKEND_GLX_H__
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#define __CLUTTER_BACKEND_GLX_H__
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#include <glib-object.h>
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#include <clutter/clutter-event.h>
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#include <clutter/clutter-backend.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <GL/glx.h>
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#include <GL/gl.h>
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#include "../x11/clutter-backend-x11.h"
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#include "clutter-glx.h"
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_BACKEND_GLX (clutter_backend_glx_get_type ())
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#define CLUTTER_BACKEND_GLX(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BACKEND_GLX, ClutterBackendGLX))
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#define CLUTTER_IS_BACKEND_GLX(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BACKEND_GLX))
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#define CLUTTER_BACKEND_GLX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_BACKEND_GLX, ClutterBackendGLXClass))
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#define CLUTTER_IS_BACKEND_GLX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_BACKEND_GLX))
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#define CLUTTER_BACKEND_GLX_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_BACKEND_GLX, ClutterBackendGLXClass))
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typedef struct _ClutterBackendGLX ClutterBackendGLX;
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typedef struct _ClutterBackendGLXClass ClutterBackendGLXClass;
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typedef enum ClutterGLXVBlankType {
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CLUTTER_VBLANK_NONE = 0,
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CLUTTER_VBLANK_GLX_SWAP,
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CLUTTER_VBLANK_GLX,
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CLUTTER_VBLANK_DRI
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} ClutterGLXVBlankType;
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typedef int (*GetVideoSyncProc) (unsigned int *count);
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typedef int (*WaitVideoSyncProc) (int divisor,
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int remainder,
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unsigned int *count);
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typedef int (*SwapIntervalProc) (int interval);
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struct _ClutterBackendGLX
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{
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ClutterBackendX11 parent_instance;
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int error_base;
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int event_base;
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/* Single context for all wins */
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gboolean found_fbconfig;
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GLXFBConfig fbconfig;
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GLXContext gl_context;
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Window dummy_xwin;
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GLXWindow dummy_glxwin;
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/* Vblank stuff */
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GetVideoSyncProc get_video_sync;
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WaitVideoSyncProc wait_video_sync;
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SwapIntervalProc swap_interval;
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gint dri_fd;
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ClutterGLXVBlankType vblank_type;
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/* props */
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Atom atom_WM_STATE;
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Atom atom_WM_STATE_FULLSCREEN;
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};
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struct _ClutterBackendGLXClass
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{
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ClutterBackendX11Class parent_class;
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};
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GType clutter_backend_glx_get_type (void) G_GNUC_CONST;
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gboolean
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_clutter_backend_glx_get_fbconfig (ClutterBackendGLX *backend_x11,
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GLXFBConfig *config);
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G_END_DECLS
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#endif /* __CLUTTER_BACKEND_GLX_H__ */
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