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.
913 lines
29 KiB
C
913 lines
29 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <glib/gi18n-lib.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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#include <GL/glx.h>
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#include <GL/glxext.h>
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#include <GL/gl.h>
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#include "clutter-backend-glx.h"
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#include "clutter-event-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-event.h"
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#include "../clutter-main.h"
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#include "../clutter-debug.h"
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#include "../clutter-private.h"
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#include "../clutter-version.h"
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#include "cogl/cogl.h"
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G_DEFINE_TYPE (ClutterBackendGLX, clutter_backend_glx, CLUTTER_TYPE_BACKEND_X11);
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/* singleton object */
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static ClutterBackendGLX *backend_singleton = NULL;
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static gchar *clutter_vblank_name = NULL;
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#ifdef __linux__
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#define DRM_VBLANK_RELATIVE 0x1;
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struct drm_wait_vblank_request {
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int type;
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unsigned int sequence;
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unsigned long signal;
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};
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struct drm_wait_vblank_reply {
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int type;
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unsigned int sequence;
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long tval_sec;
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long tval_usec;
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};
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typedef union drm_wait_vblank {
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struct drm_wait_vblank_request request;
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struct drm_wait_vblank_reply reply;
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} drm_wait_vblank_t;
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#define DRM_IOCTL_BASE 'd'
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#define DRM_IOWR(nr,type) _IOWR(DRM_IOCTL_BASE,nr,type)
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#define DRM_IOCTL_WAIT_VBLANK DRM_IOWR(0x3a, drm_wait_vblank_t)
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static int 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
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G_CONST_RETURN gchar*
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clutter_backend_glx_get_vblank_method (void)
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{
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return clutter_vblank_name;
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}
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static gboolean
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clutter_backend_glx_pre_parse (ClutterBackend *backend,
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GError **error)
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{
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const gchar *env_string;
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env_string = g_getenv ("CLUTTER_VBLANK");
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if (env_string)
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{
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clutter_vblank_name = g_strdup (env_string);
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env_string = NULL;
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}
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return clutter_backend_x11_pre_parse (backend, error);
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}
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static gboolean
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clutter_backend_glx_post_parse (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
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ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
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ClutterBackendClass *backend_class =
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CLUTTER_BACKEND_CLASS (clutter_backend_glx_parent_class);
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int glx_major, glx_minor;
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if (!backend_class->post_parse (backend, error))
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return FALSE;
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if (!glXQueryExtension (backend_x11->xdpy,
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&backend_glx->error_base,
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&backend_glx->event_base))
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"XServer appears to lack required GLX support");
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return FALSE;
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}
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/* XXX: Technically we should require >= GLX 1.3 support but for a long
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* time Mesa has exported a hybrid GLX, exporting extensions specified
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* to require GLX 1.3, but still reporting 1.2 via glXQueryVersion. */
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if (!glXQueryVersion (backend_x11->xdpy, &glx_major, &glx_minor)
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|| !(glx_major > 1 || glx_minor > 2))
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"XServer appears to lack required GLX 1.2 support");
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return FALSE;
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}
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return TRUE;
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}
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static const GOptionEntry entries[] =
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{
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{ "vblank", 0,
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0,
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G_OPTION_ARG_STRING, &clutter_vblank_name,
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N_("VBlank method to be used (none, dri or glx)"), "METHOD"
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},
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{ NULL }
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};
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static void
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clutter_backend_glx_add_options (ClutterBackend *backend,
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GOptionGroup *group)
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{
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g_option_group_add_entries (group, entries);
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clutter_backend_x11_add_options (backend, group);
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}
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static void
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clutter_backend_glx_finalize (GObject *gobject)
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{
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if (backend_singleton)
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backend_singleton = NULL;
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G_OBJECT_CLASS (clutter_backend_glx_parent_class)->finalize (gobject);
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}
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static void
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clutter_backend_glx_dispose (GObject *gobject)
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{
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ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (gobject);
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (gobject);
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/* Unrealize all shaders, since the GL context is going away */
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_clutter_shader_release_all ();
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if (backend_glx->gl_context)
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{
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glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
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glXDestroyContext (backend_x11->xdpy, backend_glx->gl_context);
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backend_glx->gl_context = None;
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}
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if (backend_glx->dummy_glxwin)
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{
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glXDestroyWindow (backend_x11->xdpy, backend_glx->dummy_glxwin);
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backend_glx->dummy_glxwin = None;
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}
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if (backend_glx->dummy_xwin)
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{
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XDestroyWindow (backend_x11->xdpy, backend_glx->dummy_xwin);
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backend_glx->dummy_xwin = None;
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}
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G_OBJECT_CLASS (clutter_backend_glx_parent_class)->dispose (gobject);
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}
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static GObject *
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clutter_backend_glx_constructor (GType gtype,
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guint n_params,
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GObjectConstructParam *params)
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{
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GObjectClass *parent_class;
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GObject *retval;
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if (!backend_singleton)
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{
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parent_class = G_OBJECT_CLASS (clutter_backend_glx_parent_class);
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retval = parent_class->constructor (gtype, n_params, params);
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backend_singleton = CLUTTER_BACKEND_GLX (retval);
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return retval;
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}
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g_warning ("Attempting to create a new backend object. This should "
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"never happen, so we return the singleton instance.");
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return g_object_ref (backend_singleton);
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}
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static gboolean
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check_vblank_env (const char *name)
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{
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if (clutter_vblank_name && !g_ascii_strcasecmp (clutter_vblank_name, name))
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return TRUE;
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return FALSE;
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}
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static ClutterFeatureFlags
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clutter_backend_glx_get_features (ClutterBackend *backend)
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{
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ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
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const gchar *glx_extensions = NULL;
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ClutterFeatureFlags flags;
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flags = clutter_backend_x11_get_features (backend);
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flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
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/* this will make sure that the GL context exists */
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g_assert (backend_glx->gl_context != None);
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g_assert (glXGetCurrentDrawable () != None);
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CLUTTER_NOTE (BACKEND,
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"Checking features\n"
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" GL_VENDOR: %s\n"
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" GL_RENDERER: %s\n"
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" GL_VERSION: %s\n"
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" GL_EXTENSIONS: %s\n",
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glGetString (GL_VENDOR),
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glGetString (GL_RENDERER),
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glGetString (GL_VERSION),
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glGetString (GL_EXTENSIONS));
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glx_extensions =
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glXQueryExtensionsString (clutter_x11_get_default_display (),
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clutter_x11_get_default_screen ());
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CLUTTER_NOTE (BACKEND, "GLX Extensions: %s", glx_extensions);
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/* First check for explicit disabling or it set elsewhere (eg NVIDIA) */
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if (getenv ("__GL_SYNC_TO_VBLANK") || check_vblank_env ("none"))
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{
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CLUTTER_NOTE (BACKEND, "vblank sync: disabled at user request");
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}
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else
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{
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/* We try two GL vblank syncing mechanisms.
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* glXSwapIntervalSGI is tried first, then glXGetVideoSyncSGI.
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*
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* glXSwapIntervalSGI is known to work with Mesa and in particular
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* the Intel drivers. glXGetVideoSyncSGI has serious problems with
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* Intel drivers causing terrible frame rate so it only tried as a
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* fallback.
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*
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* How well glXGetVideoSyncSGI works with other driver (ATI etc) needs
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* to be investigated. glXGetVideoSyncSGI on ATI at least seems to have
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* no effect.
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*/
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if (!check_vblank_env ("dri") &&
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cogl_check_extension ("GLX_SGI_swap_control", glx_extensions))
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{
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backend_glx->swap_interval =
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(SwapIntervalProc) cogl_get_proc_address ("glXSwapIntervalSGI");
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CLUTTER_NOTE (BACKEND, "attempting glXSwapIntervalSGI vblank setup");
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if (backend_glx->swap_interval != NULL)
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{
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if (backend_glx->swap_interval (1) == 0)
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{
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backend_glx->vblank_type = CLUTTER_VBLANK_GLX_SWAP;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI setup success");
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}
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}
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if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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CLUTTER_NOTE (BACKEND, "glXSwapIntervalSGI vblank setup failed");
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#ifdef GLX_INTEL_swap_event
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/* GLX_INTEL_swap_event allows us to avoid blocking the CPU while
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* we wait for glXSwapBuffers to complete, and instead we get an X
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* event notifying us of completion... */
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if (cogl_check_extension ("GLX_INTEL_swap_event", glx_extensions) &&
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flags & CLUTTER_FEATURE_SYNC_TO_VBLANK)
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flags |= CLUTTER_FEATURE_SWAP_EVENTS;
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#endif /* GLX_INTEL_swap_event */
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}
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if (!check_vblank_env ("dri") &&
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!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK) &&
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cogl_check_extension ("GLX_SGI_video_sync", glx_extensions))
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{
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CLUTTER_NOTE (BACKEND, "attempting glXGetVideoSyncSGI vblank setup");
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backend_glx->get_video_sync =
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(GetVideoSyncProc) cogl_get_proc_address ("glXGetVideoSyncSGI");
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backend_glx->wait_video_sync =
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(WaitVideoSyncProc) cogl_get_proc_address ("glXWaitVideoSyncSGI");
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if ((backend_glx->get_video_sync != NULL) &&
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(backend_glx->wait_video_sync != NULL))
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{
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CLUTTER_NOTE (BACKEND,
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"glXGetVideoSyncSGI vblank setup success");
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backend_glx->vblank_type = CLUTTER_VBLANK_GLX;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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}
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if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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CLUTTER_NOTE (BACKEND, "glXGetVideoSyncSGI vblank setup failed");
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}
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#ifdef __linux__
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/*
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* DRI is really an extreme fallback -rumoured to work with Via chipsets
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*/
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if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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{
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CLUTTER_NOTE (BACKEND, "attempting DRI vblank setup");
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backend_glx->dri_fd = open("/dev/dri/card0", O_RDWR);
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if (backend_glx->dri_fd >= 0)
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{
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CLUTTER_NOTE (BACKEND, "DRI vblank setup success");
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backend_glx->vblank_type = CLUTTER_VBLANK_DRI;
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flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
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}
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if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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CLUTTER_NOTE (BACKEND, "DRI vblank setup failed");
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}
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#endif /* __linux__ */
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if (!(flags & CLUTTER_FEATURE_SYNC_TO_VBLANK))
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CLUTTER_NOTE (BACKEND, "no use-able vblank mechanism found");
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}
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CLUTTER_NOTE (BACKEND, "backend features checked");
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return flags;
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}
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/* It seems the GLX spec never defined an invalid GLXFBConfig that
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* we could overload as an indication of error, so we have to return
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* an explicit boolean status. */
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gboolean
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_clutter_backend_glx_get_fbconfig (ClutterBackendGLX *backend_glx,
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GLXFBConfig *config)
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{
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ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend_glx);
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GLXFBConfig *configs = NULL;
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gboolean use_argb = clutter_x11_get_use_argb_visual ();
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int n_configs, i;
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static const int attributes[] = {
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GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
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GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_DOUBLEBUFFER, GL_TRUE,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_ALPHA_SIZE, 1,
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GLX_DEPTH_SIZE, 1,
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GLX_STENCIL_SIZE, 1,
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None
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};
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if (backend_x11->xdpy == None || backend_x11->xscreen == None)
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return FALSE;
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/* If we don't already have a cached config then try to get one */
|
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if (!backend_glx->found_fbconfig)
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{
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CLUTTER_NOTE (BACKEND,
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"Retrieving GL fbconfig, dpy: %p, xscreen; %p (%d)",
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backend_x11->xdpy,
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backend_x11->xscreen,
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backend_x11->xscreen_num);
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configs = glXChooseFBConfig (backend_x11->xdpy,
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backend_x11->xscreen_num,
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attributes,
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&n_configs);
|
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if (configs)
|
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{
|
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if (use_argb)
|
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{
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for (i = 0; i < n_configs; i++)
|
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{
|
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XVisualInfo *vinfo;
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|
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vinfo = glXGetVisualFromFBConfig (backend_x11->xdpy,
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configs[i]);
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if (vinfo == None)
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continue;
|
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|
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if (vinfo->depth == 32 &&
|
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(vinfo->red_mask == 0xff0000 &&
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vinfo->green_mask == 0x00ff00 &&
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vinfo->blue_mask == 0x0000ff))
|
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{
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CLUTTER_NOTE (BACKEND,
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"Found GLX visual ARGB [index:%d]", i);
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|
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backend_glx->found_fbconfig = TRUE;
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backend_glx->fbconfig = configs[i];
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goto out;
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}
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}
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|
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/* If we make it here then we didn't find an RGBA config so
|
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we'll fall back to using an RGB config */
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|
CLUTTER_NOTE (BACKEND, "ARGB visual requested, but none found");
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}
|
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|
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if (n_configs >= 1)
|
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{
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backend_glx->found_fbconfig = TRUE;
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backend_glx->fbconfig = configs[0];
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}
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|
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out:
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XFree (configs);
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}
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}
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|
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if (backend_glx->found_fbconfig)
|
|
{
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*config = backend_glx->fbconfig;
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|
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return TRUE;
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}
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else
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return FALSE;
|
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}
|
|
|
|
static XVisualInfo *
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clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
|
|
{
|
|
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend_x11);
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GLXFBConfig config;
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|
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if (!_clutter_backend_glx_get_fbconfig (backend_glx, &config))
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return NULL;
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|
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return glXGetVisualFromFBConfig (backend_x11->xdpy, config);
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}
|
|
|
|
static gboolean
|
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clutter_backend_glx_create_context (ClutterBackend *backend,
|
|
GError **error)
|
|
{
|
|
ClutterBackendGLX *backend_glx = CLUTTER_BACKEND_GLX (backend);
|
|
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
GLXFBConfig config;
|
|
gboolean is_direct;
|
|
Window root_xwin;
|
|
XSetWindowAttributes attrs;
|
|
XVisualInfo *xvisinfo;
|
|
Display *xdisplay;
|
|
int major;
|
|
int minor;
|
|
GLXDrawable dummy_drawable;
|
|
|
|
if (backend_glx->gl_context != None)
|
|
return TRUE;
|
|
|
|
xdisplay = clutter_x11_get_default_display ();
|
|
root_xwin = clutter_x11_get_root_window ();
|
|
|
|
if (!_clutter_backend_glx_get_fbconfig (backend_glx, &config))
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to find suitable fbconfig for the GLX context");
|
|
return FALSE;
|
|
}
|
|
|
|
CLUTTER_NOTE (BACKEND, "Creating GLX Context (display: %p)", xdisplay);
|
|
|
|
backend_glx->gl_context = glXCreateNewContext (xdisplay,
|
|
config,
|
|
GLX_RGBA_TYPE,
|
|
NULL,
|
|
True);
|
|
if (backend_glx->gl_context == None)
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to create suitable GL context");
|
|
return FALSE;
|
|
}
|
|
|
|
is_direct = glXIsDirect (xdisplay, backend_glx->gl_context);
|
|
|
|
CLUTTER_NOTE (GL, "Setting %s context",
|
|
is_direct ? "direct"
|
|
: "indirect");
|
|
_cogl_set_indirect_context (!is_direct);
|
|
|
|
/* COGL assumes that there is always a GL context selected; in order
|
|
* to make sure that a GLX context exists and is made current, we use
|
|
* a dummy, offscreen override-redirect window to which we can always
|
|
* fall back if no stage is available
|
|
*
|
|
* XXX - we need to do this dance because GLX does not allow creating
|
|
* a context and querying it for basic information (even the function
|
|
* pointers) unless it's made current to a real Drawable. it should be
|
|
* possible to avoid this in future releases of Mesa and X11, but right
|
|
* now this is the best solution available.
|
|
*/
|
|
xvisinfo = glXGetVisualFromFBConfig (xdisplay, config);
|
|
if (xvisinfo == None)
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to retrieve the X11 visual");
|
|
return FALSE;
|
|
}
|
|
|
|
clutter_x11_trap_x_errors ();
|
|
|
|
attrs.override_redirect = True;
|
|
attrs.colormap = XCreateColormap (xdisplay,
|
|
root_xwin,
|
|
xvisinfo->visual,
|
|
AllocNone);
|
|
|
|
backend_glx->dummy_xwin = XCreateWindow (xdisplay, root_xwin,
|
|
-100, -100, 1, 1,
|
|
0,
|
|
xvisinfo->depth,
|
|
CopyFromParent,
|
|
xvisinfo->visual,
|
|
CWOverrideRedirect | CWColormap,
|
|
&attrs);
|
|
|
|
/* Try and create a GLXWindow to use with extensions dependent on
|
|
* GLX versions >= 1.3 that don't accept regular X Windows as GLX
|
|
* drawables. */
|
|
if (glXQueryVersion (backend_x11->xdpy, &major, &minor) &&
|
|
major == 1 && minor >= 3)
|
|
{
|
|
backend_glx->dummy_glxwin = glXCreateWindow (backend_x11->xdpy,
|
|
config,
|
|
backend_glx->dummy_xwin,
|
|
NULL);
|
|
}
|
|
|
|
if (backend_glx->dummy_glxwin)
|
|
dummy_drawable = backend_glx->dummy_glxwin;
|
|
else
|
|
dummy_drawable = backend_glx->dummy_xwin;
|
|
|
|
CLUTTER_NOTE (BACKEND, "Selecting dummy 0x%x for the GLX context",
|
|
(unsigned int) dummy_drawable);
|
|
|
|
glXMakeContextCurrent (xdisplay,
|
|
dummy_drawable,
|
|
dummy_drawable,
|
|
backend_glx->gl_context);
|
|
|
|
XFree (xvisinfo);
|
|
|
|
if (clutter_x11_untrap_x_errors ())
|
|
{
|
|
g_set_error (error, CLUTTER_INIT_ERROR,
|
|
CLUTTER_INIT_ERROR_BACKEND,
|
|
"Unable to select the newly created GLX context");
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* TODO: remove this interface in favour of
|
|
* _clutter_stage_window_make_current () */
|
|
static void
|
|
clutter_backend_glx_ensure_context (ClutterBackend *backend,
|
|
ClutterStage *stage)
|
|
{
|
|
ClutterStageWindow *impl;
|
|
|
|
/* if there is no stage, the stage is being destroyed or it has no
|
|
* implementation attached to it then we clear the GL context
|
|
*/
|
|
if (stage == NULL ||
|
|
(CLUTTER_PRIVATE_FLAGS (stage) & CLUTTER_ACTOR_IN_DESTRUCTION) ||
|
|
((impl = _clutter_stage_get_window (stage)) == NULL))
|
|
{
|
|
ClutterBackendX11 *backend_x11;
|
|
|
|
backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
CLUTTER_NOTE (MULTISTAGE, "Clearing all context");
|
|
|
|
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
|
|
}
|
|
else
|
|
{
|
|
ClutterBackendGLX *backend_glx;
|
|
ClutterBackendX11 *backend_x11;
|
|
ClutterStageGLX *stage_glx;
|
|
ClutterStageX11 *stage_x11;
|
|
GLXDrawable drawable;
|
|
|
|
g_assert (impl != NULL);
|
|
|
|
stage_glx = CLUTTER_STAGE_GLX (impl);
|
|
stage_x11 = CLUTTER_STAGE_X11 (impl);
|
|
backend_glx = CLUTTER_BACKEND_GLX (backend);
|
|
backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
|
|
drawable = stage_glx->glxwin ? stage_glx->glxwin : stage_x11->xwin;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"Setting context for stage of type %s, window: 0x%x",
|
|
G_OBJECT_TYPE_NAME (impl),
|
|
(unsigned int) drawable);
|
|
|
|
/* no GL context to set */
|
|
if (backend_glx->gl_context == None)
|
|
return;
|
|
|
|
clutter_x11_trap_x_errors ();
|
|
|
|
/* we might get here inside the final dispose cycle, so we
|
|
* need to handle this gracefully
|
|
*/
|
|
if (drawable == None)
|
|
{
|
|
GLXDrawable dummy_drawable;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"Received a stale stage, clearing all context");
|
|
|
|
if (backend_glx->dummy_glxwin)
|
|
dummy_drawable = backend_glx->dummy_glxwin;
|
|
else
|
|
dummy_drawable = backend_glx->dummy_xwin;
|
|
|
|
if (dummy_drawable == None)
|
|
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
|
|
else
|
|
{
|
|
glXMakeContextCurrent (backend_x11->xdpy,
|
|
dummy_drawable,
|
|
dummy_drawable,
|
|
backend_glx->gl_context);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
CLUTTER_NOTE (BACKEND,
|
|
"MakeContextCurrent dpy: %p, window: 0x%x (%s), context: %p",
|
|
backend_x11->xdpy,
|
|
(unsigned int) drawable,
|
|
stage_x11->is_foreign_xwin ? "foreign" : "native",
|
|
backend_glx->gl_context);
|
|
|
|
glXMakeContextCurrent (backend_x11->xdpy,
|
|
drawable,
|
|
drawable,
|
|
backend_glx->gl_context);
|
|
}
|
|
|
|
if (clutter_x11_untrap_x_errors ())
|
|
g_critical ("Unable to make the stage window 0x%x the current "
|
|
"GLX drawable",
|
|
(unsigned int) drawable);
|
|
}
|
|
}
|
|
|
|
static void
|
|
glx_wait_for_vblank (ClutterBackendGLX *backend_glx)
|
|
{
|
|
/* 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
|
|
*/
|
|
|
|
switch (backend_glx->vblank_type)
|
|
{
|
|
case CLUTTER_VBLANK_GLX_SWAP:
|
|
/* Nothing */
|
|
break;
|
|
|
|
case CLUTTER_VBLANK_GLX:
|
|
{
|
|
unsigned int retraceCount;
|
|
|
|
glFinish ();
|
|
|
|
backend_glx->get_video_sync (&retraceCount);
|
|
backend_glx->wait_video_sync (2,
|
|
(retraceCount + 1) % 2,
|
|
&retraceCount);
|
|
}
|
|
break;
|
|
|
|
case CLUTTER_VBLANK_DRI:
|
|
#ifdef __linux__
|
|
{
|
|
drm_wait_vblank_t blank;
|
|
|
|
glFinish ();
|
|
|
|
blank.request.type = DRM_VBLANK_RELATIVE;
|
|
blank.request.sequence = 1;
|
|
blank.request.signal = 0;
|
|
drm_wait_vblank (backend_glx->dri_fd, &blank);
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
case CLUTTER_VBLANK_NONE:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_redraw (ClutterBackend *backend,
|
|
ClutterStage *stage)
|
|
{
|
|
ClutterBackendX11 *backend_x11;
|
|
ClutterStageGLX *stage_glx;
|
|
ClutterStageX11 *stage_x11;
|
|
ClutterStageWindow *impl;
|
|
CLUTTER_STATIC_TIMER (painting_timer,
|
|
"Redrawing", /* parent */
|
|
"Painting actors",
|
|
"The time spent painting actors",
|
|
0 /* no application private data */);
|
|
CLUTTER_STATIC_TIMER (swapbuffers_timer,
|
|
"Redrawing", /* parent */
|
|
"glXSwapBuffers",
|
|
"The time spent blocked by glXSwapBuffers",
|
|
0 /* no application private data */);
|
|
|
|
impl = _clutter_stage_get_window (stage);
|
|
if (G_UNLIKELY (impl == NULL))
|
|
{
|
|
CLUTTER_NOTE (BACKEND, "Stage [%p] has no implementation", stage);
|
|
return;
|
|
}
|
|
|
|
g_assert (CLUTTER_IS_STAGE_GLX (impl));
|
|
|
|
backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
stage_x11 = CLUTTER_STAGE_X11 (impl);
|
|
stage_glx = CLUTTER_STAGE_GLX (impl);
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, painting_timer);
|
|
/* this will cause the stage implementation to be painted */
|
|
clutter_actor_paint (CLUTTER_ACTOR (stage));
|
|
cogl_flush ();
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, painting_timer);
|
|
|
|
if (stage_x11->xwin != None)
|
|
{
|
|
GLXDrawable drawable =
|
|
stage_glx->glxwin ? stage_glx->glxwin : stage_x11->xwin;
|
|
|
|
/* wait for the next vblank */
|
|
CLUTTER_NOTE (BACKEND, "Waiting for vblank");
|
|
glx_wait_for_vblank (CLUTTER_BACKEND_GLX (backend));
|
|
|
|
/* push on the screen */
|
|
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++;
|
|
|
|
CLUTTER_TIMER_START (_clutter_uprof_context, swapbuffers_timer);
|
|
glXSwapBuffers (backend_x11->xdpy, drawable);
|
|
CLUTTER_TIMER_STOP (_clutter_uprof_context, swapbuffers_timer);
|
|
}
|
|
}
|
|
|
|
static ClutterStageWindow *
|
|
clutter_backend_glx_create_stage (ClutterBackend *backend,
|
|
ClutterStage *wrapper,
|
|
GError **error)
|
|
{
|
|
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (backend);
|
|
ClutterStageWindow *stage_window;
|
|
ClutterStageX11 *stage_x11;
|
|
|
|
CLUTTER_NOTE (BACKEND, "Creating stage of type '%s'",
|
|
g_type_name (CLUTTER_STAGE_TYPE));
|
|
|
|
stage_window = g_object_new (CLUTTER_TYPE_STAGE_GLX, NULL);
|
|
|
|
/* copy backend data into the stage */
|
|
stage_x11 = CLUTTER_STAGE_X11 (stage_window);
|
|
stage_x11->wrapper = wrapper;
|
|
|
|
CLUTTER_NOTE (BACKEND,
|
|
"GLX stage created[%p] (dpy:%p, screen:%d, root:%u, wrap:%p)",
|
|
stage_window,
|
|
backend_x11->xdpy,
|
|
backend_x11->xscreen_num,
|
|
(unsigned int) backend_x11->xwin_root,
|
|
wrapper);
|
|
|
|
return stage_window;
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_class_init (ClutterBackendGLXClass *klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
|
|
ClutterBackendX11Class *backendx11_class = CLUTTER_BACKEND_X11_CLASS (klass);
|
|
|
|
gobject_class->constructor = clutter_backend_glx_constructor;
|
|
gobject_class->dispose = clutter_backend_glx_dispose;
|
|
gobject_class->finalize = clutter_backend_glx_finalize;
|
|
|
|
backend_class->pre_parse = clutter_backend_glx_pre_parse;
|
|
backend_class->post_parse = clutter_backend_glx_post_parse;
|
|
backend_class->create_stage = clutter_backend_glx_create_stage;
|
|
backend_class->add_options = clutter_backend_glx_add_options;
|
|
backend_class->get_features = clutter_backend_glx_get_features;
|
|
backend_class->redraw = clutter_backend_glx_redraw;
|
|
backend_class->create_context = clutter_backend_glx_create_context;
|
|
backend_class->ensure_context = clutter_backend_glx_ensure_context;
|
|
|
|
backendx11_class->get_visual_info = clutter_backend_glx_get_visual_info;
|
|
backendx11_class->handle_event = clutter_backend_glx_handle_event;
|
|
}
|
|
|
|
static void
|
|
clutter_backend_glx_init (ClutterBackendGLX *backend_glx)
|
|
{
|
|
|
|
}
|
|
|
|
/* every backend must implement this function */
|
|
GType
|
|
_clutter_backend_impl_get_type (void)
|
|
{
|
|
return clutter_backend_glx_get_type ();
|
|
}
|