1 /* -*- mode:c; c-basic-offset: 8; indent-tabs-mode: nil; -*- */
2 /* Tool to set the property _GNOME_SESSION_ACCELERATED on the root window */
3 /*
4 * Copyright (C) 2011 Red Hat, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * Author:
21 * Colin Walters <walters@verbum.org>
22 */
23
24 #include <string.h>
25 #include <unistd.h>
26 #include <stdlib.h>
27
28 #include <gtk/gtk.h>
29 #include <epoxy/gl.h>
30 #include <gdk/gdkx.h>
31 #include <X11/Xatom.h>
32 #include <sys/wait.h>
33
34 #include "gnome-session-check-accelerated-common.h"
35
36 /* Wait up to this long for a running check to finish */
37 #define PROPERTY_CHANGE_TIMEOUT 5000
38
39 /* Values used for the _GNOME_SESSION_ACCELERATED root window property */
40 #define NO_ACCEL 0
41 #define HAVE_ACCEL 1
42 #define ACCEL_CHECK_RUNNING 2
43
44 static Atom is_accelerated_atom;
45 static Atom is_software_rendering_atom;
46 static Atom renderer_atom;
47 static gboolean property_changed;
48
49 static gboolean
on_property_notify_timeout(gpointer data)50 on_property_notify_timeout (gpointer data)
51 {
52 gtk_main_quit ();
53 return FALSE;
54 }
55
56 static GdkFilterReturn
property_notify_filter(GdkXEvent * xevent,GdkEvent * event,gpointer data)57 property_notify_filter (GdkXEvent *xevent,
58 GdkEvent *event,
59 gpointer data)
60 {
61 XPropertyEvent *ev = xevent;
62
63 if (ev->type == PropertyNotify && ev->atom == is_accelerated_atom) {
64 property_changed = TRUE;
65 gtk_main_quit ();
66 }
67
68 return GDK_FILTER_CONTINUE;
69 }
70
71 static gboolean
wait_for_property_notify(void)72 wait_for_property_notify (void)
73 {
74 GdkDisplay *display;
75 GdkScreen *screen;
76 GdkWindow *root;
77 Window rootwin;
78
79 property_changed = FALSE;
80
81 display = gdk_display_get_default ();
82 screen = gdk_display_get_default_screen (display);
83 root = gdk_screen_get_root_window (screen);
84 rootwin = gdk_x11_window_get_xid (root);
85
86 XSelectInput (GDK_DISPLAY_XDISPLAY (display), rootwin, PropertyChangeMask);
87 gdk_window_add_filter (root, property_notify_filter, NULL);
88 g_timeout_add (PROPERTY_CHANGE_TIMEOUT, on_property_notify_timeout, NULL);
89
90 gtk_main ();
91
92 return property_changed;
93 }
94
95 static char *
get_gtk_gles_renderer(void)96 get_gtk_gles_renderer (void)
97 {
98 GtkWidget *win;
99 GdkGLContext *context;
100 char *renderer = NULL;
101
102 win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
103 gtk_widget_realize (win);
104 context = gdk_window_create_gl_context (gtk_widget_get_window (win), NULL);
105 if (!context)
106 return NULL;
107 gdk_gl_context_make_current (context);
108 renderer = g_strdup ((char *) glGetString (GL_RENDERER));
109 gdk_gl_context_clear_current ();
110 g_object_unref (context);
111
112 return renderer;
113 }
114
115 static gboolean
is_discrete_gpu_check(void)116 is_discrete_gpu_check (void)
117 {
118 const char *dri_prime;
119
120 dri_prime = g_getenv ("DRI_PRIME");
121 if (!dri_prime)
122 return FALSE;
123 if (*dri_prime != '1')
124 return FALSE;
125 return TRUE;
126 }
127
128 int
main(int argc,char ** argv)129 main (int argc, char **argv)
130 {
131 GdkDisplay *display = NULL;
132 int estatus;
133 char *gl_helper_argv[] = { LIBEXECDIR "/gnome-session-check-accelerated-gl-helper", "--print-renderer", NULL };
134 char *gles_helper_argv[] = { LIBEXECDIR "/gnome-session-check-accelerated-gles-helper", "--print-renderer", NULL };
135 char *renderer_string = NULL;
136 char *gl_renderer_string = NULL, *gles_renderer_string = NULL;
137 gboolean gl_software_rendering = FALSE, gles_software_rendering = FALSE;
138 Window rootwin;
139 glong is_accelerated, is_software_rendering;
140 GError *gl_error = NULL, *gles_error = NULL;
141
142 gtk_init (NULL, NULL);
143
144 /* gnome-session-check-accelerated gets run before X is started in the wayland
145 * case, and it currently requires X. Until we have that working, just always
146 * assume wayland will work.
147 * Also make sure that we don't read cached information about the first GPU
148 * when requesting information about the second.
149 */
150 if (is_discrete_gpu_check () || g_strcmp0 (g_getenv ("XDG_SESSION_TYPE"), "x11") != 0) {
151 renderer_string = get_gtk_gles_renderer ();
152 if (renderer_string) {
153 g_print ("%s", renderer_string);
154 return 0;
155 }
156 return 1;
157 }
158
159 display = gdk_display_get_default ();
160 /* when running on X11 with a nested wayland GDK will default to wayland
161 * so looking for X11 atoms will not work (and crash).
162 */
163 if (!GDK_IS_X11_DISPLAY (display)) {
164 g_printerr ("gnome-session-check-accelerated: no X11 display found\n");
165 return 1;
166 }
167
168 rootwin = gdk_x11_get_default_root_xwindow ();
169
170 is_accelerated_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_SESSION_ACCELERATED");
171 is_software_rendering_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_IS_SOFTWARE_RENDERING");
172 renderer_atom = gdk_x11_get_xatom_by_name_for_display (display, "_GNOME_SESSION_RENDERER");
173
174 {
175 Atom type;
176 gint format;
177 gulong nitems;
178 gulong bytes_after;
179 guchar *data;
180
181 read:
182 gdk_x11_display_error_trap_push (display);
183 XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), rootwin,
184 is_accelerated_atom,
185 0, G_MAXLONG, False, XA_CARDINAL, &type, &format, &nitems,
186 &bytes_after, &data);
187 gdk_x11_display_error_trap_pop_ignored (display);
188
189 if (type == XA_CARDINAL) {
190 glong *is_accelerated_ptr = (glong*) data;
191
192 if (*is_accelerated_ptr == ACCEL_CHECK_RUNNING) {
193 /* Test in progress, wait */
194 if (wait_for_property_notify ())
195 goto read;
196 /* else fall through and do the check ourselves */
197
198 } else {
199 gdk_x11_display_error_trap_push (display);
200 XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), rootwin,
201 renderer_atom,
202 0, G_MAXLONG, False, XA_STRING, &type, &format, &nitems,
203 &bytes_after, &data);
204 gdk_x11_display_error_trap_pop_ignored (display);
205
206 if (type == XA_STRING) {
207 g_print ("%s", data);
208 }
209
210 return (*is_accelerated_ptr == 0 ? 1 : 0);
211 }
212 }
213 }
214
215 /* We don't have the property or it's the wrong type.
216 * Try to compute it now.
217 */
218
219 /* First indicate that a test is in progress */
220 is_accelerated = ACCEL_CHECK_RUNNING;
221 is_software_rendering = FALSE;
222 estatus = 1;
223
224 XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
225 rootwin,
226 is_accelerated_atom,
227 XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_accelerated, 1);
228
229 gdk_display_sync (display);
230
231 /* First, try the GL helper */
232 if (g_spawn_sync (NULL, (char **) gl_helper_argv, NULL, 0,
233 NULL, NULL, &gl_renderer_string, NULL, &estatus, &gl_error)) {
234 is_accelerated = (WEXITSTATUS(estatus) == HELPER_ACCEL);
235 gl_software_rendering = (WEXITSTATUS(estatus) == HELPER_SOFTWARE_RENDERING);
236 if (is_accelerated) {
237 renderer_string = gl_renderer_string;
238 goto finish;
239 }
240
241 g_printerr ("gnome-session-check-accelerated: GL Helper exited with code %d\n", estatus);
242 }
243
244 /* Then, try the GLES helper */
245 if (g_spawn_sync (NULL, (char **) gles_helper_argv, NULL, 0,
246 NULL, NULL, &gles_renderer_string, NULL, &estatus, &gles_error)) {
247 is_accelerated = (WEXITSTATUS(estatus) == HELPER_ACCEL);
248 gles_software_rendering = (WEXITSTATUS(estatus) == HELPER_SOFTWARE_RENDERING);
249 if (is_accelerated) {
250 renderer_string = gles_renderer_string;
251 goto finish;
252 }
253
254 g_printerr ("gnome-session-check-accelerated: GLES Helper exited with code %d\n", estatus);
255 }
256
257 /* If we got here, GL software rendering is our best bet */
258 if (gl_software_rendering || gles_software_rendering) {
259 is_software_rendering = TRUE;
260 is_accelerated = TRUE;
261
262 if (gl_software_rendering)
263 renderer_string = gl_renderer_string;
264 else if (gles_software_rendering)
265 renderer_string = gles_renderer_string;
266
267 goto finish;
268 }
269
270 /* Both helpers failed; print their error messages */
271 if (gl_error != NULL) {
272 g_printerr ("gnome-session-check-accelerated: Failed to run GL helper: %s\n", gl_error->message);
273 g_clear_error (&gl_error);
274 }
275
276 if (gles_error != NULL) {
277 g_printerr ("gnome-session-check-accelerated: Failed to run GLES helper: %s\n", gles_error->message);
278 g_clear_error (&gles_error);
279 }
280
281 finish:
282 if (is_accelerated) {
283 XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
284 rootwin,
285 is_accelerated_atom,
286 XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_accelerated, 1);
287 }
288
289 if (is_software_rendering) {
290 XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
291 rootwin,
292 is_software_rendering_atom,
293 XA_CARDINAL, 32, PropModeReplace, (guchar *) &is_software_rendering, 1);
294 }
295
296 if (renderer_string != NULL) {
297 XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
298 rootwin,
299 renderer_atom,
300 XA_STRING, 8, PropModeReplace, (guchar *) renderer_string, strlen (renderer_string));
301
302 /* Print the renderer */
303 g_print ("%s", renderer_string);
304 }
305
306 gdk_display_sync (display);
307
308 g_free (gl_renderer_string);
309 g_free (gles_renderer_string);
310
311 return is_accelerated ? 0 : 1;
312 }
313