8 #include <xcb/composite.h>
10 #define ROOT_MASK (XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | \
11 XCB_EVENT_MASK_STRUCTURE_NOTIFY)
13 #define SELECTION_MASK (XCB_EVENT_MASK_STRUCTURE_NOTIFY | \
14 XCB_EVENT_MASK_PROPERTY_CHANGE)
16 static gboolean screen_init(d_screen_t *sc);
17 static xcb_timestamp_t screen_timestamp(d_screen_t *sc);
20 screen_register(struct d_display *dpy, int num, d_screen_t *sc)
24 xcb_intern_atom_cookie_t ack;
25 xcb_intern_atom_reply_t *arep;
26 xcb_get_selection_owner_cookie_t sck;
27 xcb_get_selection_owner_reply_t *srep;
33 w = xcb_generate_id(sc->dpy->conn);
34 event_mask = SELECTION_MASK;
35 xcb_create_window(sc->dpy->conn, XCB_COPY_FROM_PARENT, w, sc->super.root,
36 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_ONLY,
37 sc->super.root_visual, XCB_CW_EVENT_MASK, &event_mask);
39 name = g_strdup_printf("_NET_WM_CM_S%d", sc->num);
40 ack = xcb_intern_atom(sc->dpy->conn, FALSE, strlen(name), name);
41 arep = xcb_intern_atom_reply(sc->dpy->conn, ack, NULL);
44 xcb_grab_server(sc->dpy->conn);
46 sck = xcb_get_selection_owner(sc->dpy->conn, arep->atom);
47 srep = xcb_get_selection_owner_reply(sc->dpy->conn, sck, NULL);
48 taken = !!srep->owner;
51 printf(_("screen %d already has a composite manager, skipping\n"),
59 sc->selatom = arep->atom;
61 time = screen_timestamp(sc);
63 xcb_set_selection_owner(sc->dpy->conn, w, arep->atom, time);
64 sck = xcb_get_selection_owner(sc->dpy->conn, arep->atom);
65 srep = xcb_get_selection_owner_reply(sc->dpy->conn, sck, NULL);
66 taken = srep->owner == w;
67 if (taken && screen_init(sc))
70 xcb_destroy_window(sc->dpy->conn, w);
75 xcb_ungrab_server(sc->dpy->conn);
76 xcb_flush(sc->dpy->conn);
81 window_hash(xcb_window_t *w) { return *w; }
84 window_compare(xcb_window_t *w1, xcb_window_t *w2) { return *w1 == *w2; }
87 screen_init(d_screen_t *sc)
90 xcb_generic_error_t *err;
91 xcb_void_cookie_t redir_ck;
92 xcb_composite_get_overlay_window_cookie_t overlay_ck;
93 xcb_composite_get_overlay_window_reply_t *overlay_rep;
95 sc->winhash = g_hash_table_new((GHashFunc)window_hash,
96 (GCompareFunc)window_compare);
99 xcb_composite_redirect_subwindows(sc->dpy->conn, sc->super.root,
100 XCB_COMPOSITE_REDIRECT_MANUAL);
102 overlay_ck = xcb_composite_get_overlay_window(sc->dpy->conn,
105 /* check that the redirect worked */
106 err = xcb_request_check(sc->dpy->conn, redir_ck);
108 printf(_("unable to redirect rendering, another composite manager must be running"));
113 /* get the overlay window reply */
114 overlay_rep = xcb_composite_get_overlay_window_reply(sc->dpy->conn,
118 printf(_("unable to get the composite overlay window\n"));
121 sc->overlay = overlay_rep->overlay_win;
124 mask = SELECTION_MASK;
125 xcb_change_window_attributes(sc->dpy->conn, sc->selwin,
126 XCB_CW_EVENT_MASK, &mask);
128 xcb_change_window_attributes(sc->dpy->conn, sc->super.root,
129 XCB_CW_EVENT_MASK, &mask);
134 screen_add_window(d_screen_t *sc, xcb_window_t wid)
138 /* XXX xgetwindowattributes - size and tings */
140 w = window_new(wid, sc);
141 g_hash_table_insert(sc->winhash, &w->id, w);
143 printf("screen added window 0x%x\n", w->id);
147 screen_remove_window(d_screen_t *sc, struct d_window *w)
149 printf("screen removed window 0x%x\n", w->id);
151 g_hash_table_remove(sc->winhash, &w->id);
156 screen_find_window(d_screen_t *sc, xcb_window_t id)
158 return g_hash_table_lookup(sc->winhash, &id);
161 static xcb_timestamp_t
162 screen_timestamp(d_screen_t *sc)
164 xcb_void_cookie_t ck;
165 xcb_timestamp_t time;
167 ck = xcb_change_property(sc->dpy->conn, XCB_PROP_MODE_REPLACE, sc->selwin,
168 sc->selatom, sc->selatom, 32, 0, NULL);
169 xcb_flush(sc->dpy->conn);
171 xcb_generic_event_t *ev;
173 ev = xcb_wait_for_event(sc->dpy->conn);
175 printf(_("IO error\n"));
179 /* expect errors.. */
180 if (!ev->response_type) {
181 display_error(sc->dpy, (xcb_generic_error_t*)ev);
186 if (ev->response_type == XCB_PROPERTY_NOTIFY &&
187 ev->full_sequence == ck.sequence)
189 time = ((xcb_property_notify_event_t*)ev)->time;
194 printf("created timestamp %lu\n", (unsigned long) time);