10 #include <xcb/composite.h>
12 #define ROOT_MASK (XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | \
13 XCB_EVENT_MASK_STRUCTURE_NOTIFY)
15 #define SELECTION_MASK (XCB_EVENT_MASK_STRUCTURE_NOTIFY | \
16 XCB_EVENT_MASK_PROPERTY_CHANGE)
18 static gboolean screen_init(d_screen_t *sc);
19 static xcb_timestamp_t screen_timestamp(d_screen_t *sc);
20 static void screen_add_existing_windows(d_screen_t *sc);
23 screen_register(struct d_display *dpy, int num, d_screen_t *sc)
27 xcb_intern_atom_cookie_t ack;
28 xcb_intern_atom_reply_t *arep;
29 xcb_get_selection_owner_cookie_t sck;
30 xcb_get_selection_owner_reply_t *srep;
36 w = xcb_generate_id(sc->dpy->conn);
37 event_mask = SELECTION_MASK;
38 xcb_create_window(sc->dpy->conn, XCB_COPY_FROM_PARENT, w, sc->super.root,
39 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_ONLY,
40 sc->super.root_visual, XCB_CW_EVENT_MASK, &event_mask);
42 name = g_strdup_printf("_NET_WM_CM_S%d", sc->num);
43 ack = xcb_intern_atom(sc->dpy->conn, FALSE, strlen(name), name);
44 arep = xcb_intern_atom_reply(sc->dpy->conn, ack, NULL);
47 xcb_grab_server(sc->dpy->conn);
49 sck = xcb_get_selection_owner(sc->dpy->conn, arep->atom);
50 srep = xcb_get_selection_owner_reply(sc->dpy->conn, sck, NULL);
51 taken = !!srep->owner;
54 printf(_("screen %d already has a composite manager, skipping\n"),
62 sc->selatom = arep->atom;
64 time = screen_timestamp(sc);
66 xcb_set_selection_owner(sc->dpy->conn, w, arep->atom, time);
67 sck = xcb_get_selection_owner(sc->dpy->conn, arep->atom);
68 srep = xcb_get_selection_owner_reply(sc->dpy->conn, sck, NULL);
69 taken = srep->owner == w;
70 if (taken && screen_init(sc)) {
71 screen_add_existing_windows(sc);
75 xcb_destroy_window(sc->dpy->conn, w);
80 xcb_ungrab_server(sc->dpy->conn);
81 xcb_flush(sc->dpy->conn);
86 xcb_window_hash(xcb_window_t *w) { return *w; }
89 xcb_window_compare(xcb_window_t *w1, xcb_window_t *w2) { return *w1 == *w2; }
92 screen_init(d_screen_t *sc)
95 xcb_generic_error_t *err;
96 xcb_void_cookie_t redir_ck;
97 xcb_composite_get_overlay_window_cookie_t overlay_ck;
98 xcb_composite_get_overlay_window_reply_t *overlay_rep;
101 xcb_composite_redirect_subwindows(sc->dpy->conn, sc->super.root,
102 XCB_COMPOSITE_REDIRECT_MANUAL);
104 overlay_ck = xcb_composite_get_overlay_window(sc->dpy->conn,
107 /* check that the redirect worked */
108 err = xcb_request_check(sc->dpy->conn, redir_ck);
110 printf(_("unable to redirect rendering, another composite manager must be running"));
115 /* get the overlay window reply */
116 overlay_rep = xcb_composite_get_overlay_window_reply(sc->dpy->conn,
120 printf(_("unable to get the composite overlay window\n"));
123 sc->overlay = overlay_rep->overlay_win;
126 mask = SELECTION_MASK;
127 xcb_change_window_attributes(sc->dpy->conn, sc->selwin,
128 XCB_CW_EVENT_MASK, &mask);
130 xcb_change_window_attributes(sc->dpy->conn, sc->super.root,
131 XCB_CW_EVENT_MASK, &mask);
133 /* use the render backend */
134 sc->paint = render_paint_screen;
136 sc->winhash = g_hash_table_new((GHashFunc)xcb_window_hash,
137 (GCompareFunc)xcb_window_compare);
138 sc->stacking = list_new();
143 void screen_free(d_screen_t *sc)
145 g_hash_table_unref(sc->winhash);
146 list_unref(sc->stacking);
150 screen_add_window(d_screen_t *sc, xcb_window_t wid)
154 /* XXX xgetwindowattributes - size and tings */
156 w = window_new(wid, sc);
157 g_hash_table_insert(sc->winhash, &w->id, w);
159 printf("screen added window 0x%x\n", w->id);
163 screen_add_existing_windows(d_screen_t *sc)
165 xcb_query_tree_cookie_t ck;
166 xcb_query_tree_reply_t *rep;
168 ck = xcb_query_tree(sc->dpy->conn, sc->super.root);
169 rep = xcb_query_tree_reply(sc->dpy->conn, ck, NULL);
171 xcb_window_iterator_t it;
174 it = xcb_query_tree_children_iterator(rep);
175 for (; it.rem; xcb_window_next(&it))
176 screen_add_window(sc, *it.data);
183 screen_remove_window(d_screen_t *sc, struct d_window *w)
185 printf("screen removed window 0x%x\n", w->id);
187 g_hash_table_remove(sc->winhash, &w->id);
193 screen_find_window(d_screen_t *sc, xcb_window_t id)
195 return g_hash_table_lookup(sc->winhash, &id);
198 static xcb_timestamp_t
199 screen_timestamp(d_screen_t *sc)
201 xcb_void_cookie_t ck;
202 xcb_timestamp_t time;
204 ck = xcb_change_property(sc->dpy->conn, XCB_PROP_MODE_REPLACE, sc->selwin,
205 sc->selatom, sc->selatom, 32, 0, NULL);
206 xcb_flush(sc->dpy->conn);
208 xcb_generic_event_t *ev;
210 ev = xcb_wait_for_event(sc->dpy->conn);
212 printf(_("IO error\n"));
216 /* expect errors.. */
217 if (!ev->response_type) {
218 display_error(sc->dpy, (xcb_generic_error_t*)ev);
223 if (ev->response_type == XCB_PROPERTY_NOTIFY &&
224 ev->full_sequence == ck.sequence)
226 time = ((xcb_property_notify_event_t*)ev)->time;
231 printf("created timestamp %lu\n", (unsigned long) time);
236 screen_stacking_add(d_screen_t *sc, struct d_window *w)
238 list_prepend(sc->stacking, w);
242 screen_stacking_remove(d_screen_t *sc, struct d_window *w)
244 list_remove(sc->stacking, w);