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/* -*- mode:c; c-basic-offset: 8; indent-tabs-mode: nil; -*- */
/* Tool to set the property _GNOME_SESSION_ACCELERATED on the root window */
/*
* Copyright (C) 2011 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author:
* Colin Walters <walters@verbum.org>
*/
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
#include <sys/wait.h>
#include "gnome-session-check-accelerated-common.h"
/* Wait up to this long for a running check to finish */
#define PROPERTY_CHANGE_TIMEOUT 5000
/* Values used for the _GNOME_SESSION_ACCELERATED root window property */
#define NO_ACCEL 0
#define HAVE_ACCEL 1
#define ACCEL_CHECK_RUNNING 2
static Atom is_accelerated_atom;
static Atom is_software_rendering_atom;
static gboolean property_changed;
static void
exit_1_message (const char *msg) G_GNUC_NORETURN;
static void
exit_1_message (const char *msg)
{
g_printerr ("%s", msg);
exit (1);
}
static gboolean
on_property_notify_timeout (gpointer data)
{
gtk_main_quit ();
return FALSE;
}
static GdkFilterReturn
property_notify_filter (GdkXEvent *xevent,
GdkEvent *event,
gpointer data)
{
XPropertyEvent *ev = xevent;
if (ev->type == PropertyNotify && ev->atom == is_accelerated_atom) {
property_changed = TRUE;
gtk_main_quit ();
}
return GDK_FILTER_CONTINUE;
}
static gboolean
wait_for_property_notify (void)
{
GdkDisplay *display;
GdkScreen *screen;
GdkWindow *root;
Window rootwin;
property_changed = FALSE;
display = gdk_display_get_default ();
screen = gdk_display_get_default_screen (display);
root = gdk_screen_get_root_window (screen);
rootwin = gdk_x11_window_get_xid (root);
XSelectInput (GDK_DISPLAY_XDISPLAY (display), rootwin, PropertyChangeMask);
gdk_window_add_filter (root, property_notify_filter, NULL);
g_timeout_add (PROPERTY_CHANGE_TIMEOUT, on_property_notify_timeout, NULL);
gtk_main ();
return property_changed;
}
int
main (int argc, char **argv)
{
GdkDisplay *display = NULL;
int estatus;
char *child_argv[] = { LIBEXECDIR "/gnome-session-check-accelerated-gl-helper", NULL };
Window rootwin;
glong is_accelerated, is_software_rendering;
GError *error = NULL;
/* gnome-session-check-accelerated gets run before X is started in the wayland
* case, and it currently requires X. Until we have that working, just always
* assume wayland will work
*/
if (g_strcmp0 (g_getenv ("XDG_SESSION_DESKTOP"), "gnome-wayland") == 0) {
return 0;
}
gtk_init (NULL, NULL);
display = gdk_display_get_default ();
rootwin = gdk_x11_get_default_root_xwindow ();
is_accelerated_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_SESSION_ACCELERATED");
is_software_rendering_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_IS_SOFTWARE_RENDERING");
{
Atom type;
gint format;
gulong nitems;
gulong bytes_after;
guchar *data;
read:
gdk_x11_display_error_trap_push (display);
XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), rootwin,
is_accelerated_atom,
0, G_MAXLONG, False, XA_CARDINAL, &type, &format, &nitems,
&bytes_after, &data);
gdk_x11_display_error_trap_pop_ignored (display);
if (type == XA_CARDINAL) {
glong *is_accelerated_ptr = (glong*) data;
if (*is_accelerated_ptr == ACCEL_CHECK_RUNNING) {
/* Test in progress, wait */
if (wait_for_property_notify ())
goto read;
/* else fall through and do the check ourselves */
} else {
return (*is_accelerated_ptr == 0 ? 1 : 0);
}
}
}
/* We don't have the property or it's the wrong type.
* Try to compute it now.
*/
/* First indicate that a test is in progress */
is_accelerated = ACCEL_CHECK_RUNNING;
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
rootwin,
is_accelerated_atom,
XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_accelerated, 1);
gdk_display_sync (display);
estatus = 1;
if (!g_spawn_sync (NULL, (char**)child_argv, NULL, 0,
NULL, NULL, NULL, NULL, &estatus, &error)) {
is_accelerated = FALSE;
is_software_rendering = FALSE;
g_printerr ("gnome-session-check-accelerated: Failed to run helper: %s\n", error->message);
g_clear_error (&error);
} else {
is_accelerated = (WEXITSTATUS(estatus) == HELPER_ACCEL) || (WEXITSTATUS(estatus) == HELPER_SOFTWARE_RENDERING);
is_software_rendering = (WEXITSTATUS(estatus) == HELPER_SOFTWARE_RENDERING);
if (!is_accelerated)
g_printerr ("gnome-session-check-accelerated: Helper exited with code %d\n", estatus);
}
if (is_accelerated) {
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
rootwin,
is_accelerated_atom,
XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_accelerated, 1);
}
if (is_software_rendering) {
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
rootwin,
is_software_rendering_atom,
XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_software_rendering, 1);
}
gdk_display_sync (display);
return is_accelerated ? 0 : 1;
}
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