1 /* test-randr.c --- playing with the Resize And Rotate extension.
2 * xscreensaver, Copyright (c) 2004, 2005 Jamie Zawinski <jwz@jwz.org>
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation. No representations are made about the suitability of this
9 * software for any purpose. It is provided "as is" without express or
27 #include <X11/Xatom.h>
28 #include <X11/Intrinsic.h>
30 #include <X11/Xproto.h>
31 #include <X11/extensions/Xrandr.h>
34 char *progclass = "XScreenSaver";
40 time_t now = time ((time_t *) 0);
41 char *ct = (char *) ctime (&now);
42 int n = strlen(progname);
44 strncpy(buf, progname, n);
47 strncpy(buf+n, ct+11, 8);
48 strcpy(buf+n+9, ": ");
53 static Bool error_handler_hit_p = False;
56 ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
58 error_handler_hit_p = True;
64 main (int argc, char **argv)
66 int event_number = -1, error_number = -1;
67 int major = -1, minor = -1;
72 Widget toplevel_shell = XtAppInitialize (&app, progclass, 0, 0,
73 &argc, argv, 0, 0, 0);
74 Display *dpy = XtDisplay (toplevel_shell);
75 XtGetApplicationNameAndClass (dpy, &progname, &progclass);
77 nscreens = ScreenCount(dpy);
79 if (!XRRQueryExtension(dpy, &event_number, &error_number))
81 fprintf(stderr, "%s: XRRQueryExtension(dpy, ...) ==> False\n",
83 fprintf(stderr, "%s: server does not support the RANDR extension.\n",
89 fprintf(stderr, "%s: XRRQueryExtension(dpy, ...) ==> %d, %d\n",
90 blurb(), event_number, error_number);
92 if (!XRRQueryVersion(dpy, &major, &minor))
94 fprintf(stderr, "%s: XRRQueryVersion(dpy, ...) ==> False\n",
96 fprintf(stderr, "%s: server didn't report RANDR version numbers?\n",
100 fprintf(stderr, "%s: XRRQueryVersion(dpy, ...) ==> %d, %d\n", blurb(),
104 for (i = 0; i < nscreens; i++)
106 XRRScreenConfiguration *rrc;
107 XErrorHandler old_handler;
110 error_handler_hit_p = False;
111 old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
113 rrc = (major >= 0 ? XRRGetScreenInfo (dpy, RootWindow (dpy, i)) : 0);
116 XSetErrorHandler (old_handler);
119 if (error_handler_hit_p)
121 fprintf(stderr, "%s: XRRGetScreenInfo(dpy, %d) ==> X error:\n",
123 /* do it again without the error handler to print the error */
124 rrc = XRRGetScreenInfo (dpy, RootWindow (dpy, i));
128 SizeID current_size = -1;
129 Rotation current_rotation = ~0;
131 fprintf (stderr, "\n%s: Screen %d\n", blurb(), i);
134 XRRConfigCurrentConfiguration (rrc, ¤t_rotation);
137 # if 0 /* #### This is wrong -- I don't understand what these two
138 timestamp numbers represent, or how they correlate
139 to the wall clock or to each other. */
141 Time server_time, config_time;
142 server_time = XRRConfigTimes (rrc, &config_time);
143 if (config_time == 0 || server_time == 0)
144 fprintf (stderr, "%s: config has never been changed\n",
147 fprintf (stderr, "%s: config changed %lu seconds ago\n",
148 blurb(), (unsigned long) (server_time - config_time));
154 Rotation available, current;
155 available = XRRConfigRotations (rrc, ¤t);
157 fprintf (stderr, "%s: Available Rotations:\t", blurb());
158 if (available & RR_Rotate_0) fprintf (stderr, " 0");
159 if (available & RR_Rotate_90) fprintf (stderr, " 90");
160 if (available & RR_Rotate_180) fprintf (stderr, " 180");
161 if (available & RR_Rotate_270) fprintf (stderr, " 270");
162 if (! (available & (RR_Rotate_0 | RR_Rotate_90 |
163 RR_Rotate_180 | RR_Rotate_270)))
164 fprintf (stderr, " none");
165 fprintf (stderr, "\n");
167 if (current_rotation != current)
169 "%s: WARNING: rotation inconsistency: 0x%X vs 0x%X\n",
170 blurb(), current_rotation, current);
172 fprintf (stderr, "%s: Current Rotation:\t", blurb());
173 if (current & RR_Rotate_0) fprintf (stderr, " 0");
174 if (current & RR_Rotate_90) fprintf (stderr, " 90");
175 if (current & RR_Rotate_180) fprintf (stderr, " 180");
176 if (current & RR_Rotate_270) fprintf (stderr, " 270");
177 if (! (current & (RR_Rotate_0 | RR_Rotate_90 |
178 RR_Rotate_180 | RR_Rotate_270)))
179 fprintf (stderr, " none");
180 fprintf (stderr, "\n");
182 fprintf (stderr, "%s: Available Reflections:\t", blurb());
183 if (available & RR_Reflect_X) fprintf (stderr, " X");
184 if (available & RR_Reflect_Y) fprintf (stderr, " Y");
185 if (! (available & (RR_Reflect_X | RR_Reflect_Y)))
186 fprintf (stderr, " none");
187 fprintf (stderr, "\n");
189 fprintf (stderr, "%s: Current Reflections:\t", blurb());
190 if (current & RR_Reflect_X) fprintf (stderr, " X");
191 if (current & RR_Reflect_Y) fprintf (stderr, " Y");
192 if (! (current & (RR_Reflect_X | RR_Reflect_Y)))
193 fprintf (stderr, " none");
194 fprintf (stderr, "\n");
200 XRRScreenSize *rrsizes;
202 rrsizes = XRRConfigSizes (rrc, &nsizes);
204 fprintf (stderr, "%s: sizes:\t none\n", blurb());
206 for (j = 0; j < nsizes; j++)
211 "%s: %c size %d: %d x %d\t rates:",
213 (j == current_size ? '+' : ' '),
215 rrsizes[j].width, rrsizes[j].height);
217 rates = XRRConfigRates (rrc, j, &nrates);
219 fprintf (stderr, " none?");
221 for (k = 0; k < nrates; k++)
222 fprintf (stderr, " %d", rates[k]);
223 fprintf (stderr, "\n");
224 /* don't free 'rates' */
226 /* don't free 'rrsizes' */
229 XRRFreeScreenConfigInfo (rrc);
233 fprintf(stderr, "%s: XRRGetScreenInfo(dpy, %d) ==> NULL\n",
241 XWindowAttributes xgwa[20];
243 for (i = 0; i < nscreens; i++)
245 XRRSelectInput (dpy, RootWindow (dpy, i), RRScreenChangeNotifyMask);
246 w[i] = RootWindow (dpy, i);
247 XGetWindowAttributes (dpy, w[i], &xgwa[i]);
251 fprintf (stderr, "\n%s: awaiting events...\n", progname);
255 XNextEvent (dpy, &event);
257 if (event.type == event_number + RRScreenChangeNotify)
259 XRRScreenChangeNotifyEvent *xrr_event =
260 (XRRScreenChangeNotifyEvent *) &event;
261 int screen = XRRRootToScreen (dpy, xrr_event->window);
263 fprintf (stderr, "%s: screen %d: RRScreenChangeNotify event\n",
266 fprintf (stderr, "%s: screen %d: old size: \t%d x %d\n",
268 DisplayWidth (dpy, screen),
269 DisplayHeight (dpy, screen));
270 fprintf (stderr, "%s: screen %d: old root 0x%lx:\t%d x %d\n",
271 progname, screen, (unsigned long) w[screen],
272 xgwa[screen].width, xgwa[screen].height);
274 XRRUpdateConfiguration (&event);
277 fprintf (stderr, "%s: screen %d: new size: \t%d x %d\n",
279 DisplayWidth (dpy, screen),
280 DisplayHeight (dpy, screen));
282 w[screen] = RootWindow (dpy, screen);
283 XGetWindowAttributes (dpy, w[screen], &xgwa[screen]);
284 fprintf (stderr, "%s: screen %d: new root 0x%lx:\t%d x %d\n",
285 progname, screen, (unsigned long) w[screen],
286 xgwa[screen].width, xgwa[screen].height);
287 fprintf (stderr, "\n");
291 fprintf (stderr, "%s: event %d\n", progname, event.type);