i3
xinerama.c
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1 /*
2  * vim:ts=4:sw=4:expandtab
3  *
4  * i3 - an improved dynamic tiling window manager
5  * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
6  *
7  * This is LEGACY code (we support RandR, which can do much more than
8  * Xinerama), but necessary for the poor users of the nVidia binary
9  * driver which does not support RandR in 2011 *sigh*.
10  *
11  */
12 #include "all.h"
13 
14 #include <xcb/xinerama.h>
15 
16 
17 static int num_screens;
18 
19 /*
20  * Looks in outputs for the Output whose start coordinates are x, y
21  *
22  */
23 static Output *get_screen_at(int x, int y) {
24  Output *output;
25  TAILQ_FOREACH(output, &outputs, outputs)
26  if (output->rect.x == x && output->rect.y == y)
27  return output;
28 
29  return NULL;
30 }
31 
32 /*
33  * Gets the Xinerama screens and converts them to virtual Outputs (only one screen for two
34  * Xinerama screen which are configured in clone mode) in the given screenlist
35  *
36  */
37 static void query_screens(xcb_connection_t *conn) {
38  xcb_xinerama_query_screens_reply_t *reply;
39  xcb_xinerama_screen_info_t *screen_info;
40 
41  reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
42  if (!reply) {
43  ELOG("Couldn't get Xinerama screens\n");
44  return;
45  }
46  screen_info = xcb_xinerama_query_screens_screen_info(reply);
47  int screens = xcb_xinerama_query_screens_screen_info_length(reply);
48 
49  for (int screen = 0; screen < screens; screen++) {
50  Output *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org);
51  if (s != NULL) {
52  DLOG("Re-used old Xinerama screen %p\n", s);
53  /* This screen already exists. We use the littlest screen so that the user
54  can always see the complete workspace */
55  s->rect.width = min(s->rect.width, screen_info[screen].width);
56  s->rect.height = min(s->rect.height, screen_info[screen].height);
57  } else {
58  s = scalloc(sizeof(Output));
59  sasprintf(&(s->name), "xinerama-%d", num_screens);
60  DLOG("Created new Xinerama screen %s (%p)\n", s->name, s);
61  s->active = true;
62  s->rect.x = screen_info[screen].x_org;
63  s->rect.y = screen_info[screen].y_org;
64  s->rect.width = screen_info[screen].width;
65  s->rect.height = screen_info[screen].height;
66  /* We always treat the screen at 0x0 as the primary screen */
67  if (s->rect.x == 0 && s->rect.y == 0)
70  output_init_con(s);
72  num_screens++;
73  }
74 
75  DLOG("found Xinerama screen: %d x %d at %d x %d\n",
76  screen_info[screen].width, screen_info[screen].height,
77  screen_info[screen].x_org, screen_info[screen].y_org);
78  }
79 
80  free(reply);
81 
82  if (num_screens == 0) {
83  ELOG("No screens found. Please fix your setup. i3 will exit now.\n");
84  exit(0);
85  }
86 }
87 
88 /*
89  * We have just established a connection to the X server and need the initial Xinerama
90  * information to setup workspaces for each screen.
91  *
92  */
93 void xinerama_init(void) {
94  if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
95  DLOG("Xinerama extension not found, disabling.\n");
97  } else {
98  xcb_xinerama_is_active_reply_t *reply;
99  reply = xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL);
100 
101  if (reply == NULL || !reply->state) {
102  DLOG("Xinerama is not active (in your X-Server), disabling.\n");
104  } else
106 
107  FREE(reply);
108  }
109 
110 #if 0
111  Output *output;
112  Workspace *ws;
113  /* Just go through each active output and associate one workspace */
114  TAILQ_FOREACH(output, &outputs, outputs) {
115  ws = get_first_workspace_for_output(output);
116  initialize_output(conn, output, ws);
117  }
118 #endif
119 }