9 #include <xcb/composite.h>
11 #define ROOT_MASK (XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | \
12 XCB_EVENT_MASK_STRUCTURE_NOTIFY)
14 #define SELECTION_MASK (XCB_EVENT_MASK_STRUCTURE_NOTIFY | \
15 XCB_EVENT_MASK_PROPERTY_CHANGE)
17 static gboolean screen_init(d_screen_t *sc);
18 static xcb_timestamp_t screen_timestamp(d_screen_t *sc);
21 screen_register(struct d_display *dpy, int num, d_screen_t *sc)
25 xcb_intern_atom_cookie_t ack;
26 xcb_intern_atom_reply_t *arep;
27 xcb_get_selection_owner_cookie_t sck;
28 xcb_get_selection_owner_reply_t *srep;
34 w = xcb_generate_id(sc->dpy->conn);
35 event_mask = SELECTION_MASK;
36 xcb_create_window(sc->dpy->conn, XCB_COPY_FROM_PARENT, w, sc->super.root,
37 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_ONLY,
38 sc->super.root_visual, XCB_CW_EVENT_MASK, &event_mask);
40 name = g_strdup_printf("_NET_WM_CM_S%d", sc->num);
41 ack = xcb_intern_atom(sc->dpy->conn, FALSE, strlen(name), name);
42 arep = xcb_intern_atom_reply(sc->dpy->conn, ack, NULL);
45 xcb_grab_server(sc->dpy->conn);
47 sck = xcb_get_selection_owner(sc->dpy->conn, arep->atom);
48 srep = xcb_get_selection_owner_reply(sc->dpy->conn, sck, NULL);
49 taken = !!srep->owner;
52 printf(_("screen %d already has a composite manager, skipping\n"),
60 sc->selatom = arep->atom;
62 time = screen_timestamp(sc);
64 xcb_set_selection_owner(sc->dpy->conn, w, arep->atom, time);
65 sck = xcb_get_selection_owner(sc->dpy->conn, arep->atom);
66 srep = xcb_get_selection_owner_reply(sc->dpy->conn, sck, NULL);
67 taken = srep->owner == w;
68 if (taken && screen_init(sc))
71 xcb_destroy_window(sc->dpy->conn, w);
76 xcb_ungrab_server(sc->dpy->conn);
77 xcb_flush(sc->dpy->conn);
82 window_hash(xcb_window_t *w) { return *w; }
85 window_compare(xcb_window_t *w1, xcb_window_t *w2) { return *w1 == *w2; }
88 screen_init(d_screen_t *sc)
91 xcb_generic_error_t *err;
92 xcb_void_cookie_t redir_ck;
93 xcb_composite_get_overlay_window_cookie_t overlay_ck;
94 xcb_composite_get_overlay_window_reply_t *overlay_rep;
97 xcb_composite_redirect_subwindows(sc->dpy->conn, sc->super.root,
98 XCB_COMPOSITE_REDIRECT_MANUAL);
100 overlay_ck = xcb_composite_get_overlay_window(sc->dpy->conn,
103 /* check that the redirect worked */
104 err = xcb_request_check(sc->dpy->conn, redir_ck);
106 printf(_("unable to redirect rendering, another composite manager must be running"));
111 /* get the overlay window reply */
112 overlay_rep = xcb_composite_get_overlay_window_reply(sc->dpy->conn,
116 printf(_("unable to get the composite overlay window\n"));
119 sc->overlay = overlay_rep->overlay_win;
122 mask = SELECTION_MASK;
123 xcb_change_window_attributes(sc->dpy->conn, sc->selwin,
124 XCB_CW_EVENT_MASK, &mask);
126 xcb_change_window_attributes(sc->dpy->conn, sc->super.root,
127 XCB_CW_EVENT_MASK, &mask);
129 sc->winhash = g_hash_table_new((GHashFunc)window_hash,
130 (GCompareFunc)window_compare);
131 sc->stacking = list_new();
136 void screen_free(d_screen_t *sc)
138 g_hash_table_unref(sc->winhash);
139 list_unref(sc->stacking);
143 screen_add_window(d_screen_t *sc, xcb_window_t wid)
147 /* XXX xgetwindowattributes - size and tings */
149 w = window_new(wid, sc);
150 g_hash_table_insert(sc->winhash, &w->id, w);
152 printf("screen added window 0x%x\n", w->id);
156 screen_remove_window(d_screen_t *sc, struct d_window *w)
158 printf("screen removed window 0x%x\n", w->id);
160 g_hash_table_remove(sc->winhash, &w->id);
165 screen_find_window(d_screen_t *sc, xcb_window_t id)
167 return g_hash_table_lookup(sc->winhash, &id);
170 static xcb_timestamp_t
171 screen_timestamp(d_screen_t *sc)
173 xcb_void_cookie_t ck;
174 xcb_timestamp_t time;
176 ck = xcb_change_property(sc->dpy->conn, XCB_PROP_MODE_REPLACE, sc->selwin,
177 sc->selatom, sc->selatom, 32, 0, NULL);
178 xcb_flush(sc->dpy->conn);
180 xcb_generic_event_t *ev;
182 ev = xcb_wait_for_event(sc->dpy->conn);
184 printf(_("IO error\n"));
188 /* expect errors.. */
189 if (!ev->response_type) {
190 display_error(sc->dpy, (xcb_generic_error_t*)ev);
195 if (ev->response_type == XCB_PROPERTY_NOTIFY &&
196 ev->full_sequence == ck.sequence)
198 time = ((xcb_property_notify_event_t*)ev)->time;
203 printf("created timestamp %lu\n", (unsigned long) time);