dcompmgr.c

   1 #include "screen.h"
   2 #include "window.h"
   3 #include "list.h"
   4 #include "display.h"
   5 #include "gettext.h"
   6 #include "time.h"
   7 #include "render.h"
   8
   9 #include <glib.h>
  10 #include <stdio.h>
  11 #include <sys/select.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <xcb/xcb.h>
  15 #include <xcb/damage.h>
  16
  17 typedef struct {
  18     int foo;
  19 } d_options_t;
  20
  21 static void
  22 read_options(int argc, char **argv, d_options_t *opts)
  23 {
  24     opts->foo = argc && argv;
  25 }
  26
  27 static void
  28 event(d_display_t *dpy)
  29 {
  30     xcb_generic_event_t *ev;
  31
  32     while ((ev = xcb_poll_for_event(dpy->conn))) {
  33         //printf("event %d\n", ev->response_type);
  34
  35         if (!ev->response_type) {
  36             display_error(dpy, (xcb_generic_error_t*)ev);
  37             free(ev);
  38             continue;
  39         }
  40
  41         switch (ev->response_type) {
  42         case XCB_CREATE_NOTIFY:
  43         {
  44             xcb_create_notify_event_t *cev;
  45             d_screen_t *sc;
  46
  47             cev = (xcb_create_notify_event_t*)ev;
  48             sc = display_screen_from_root(dpy, cev->parent);
  49             if (!sc) break;
  50             screen_add_window(sc, cev->window);
  51             break;
  52         }
  53         case XCB_DESTROY_NOTIFY:
  54         {
  55             xcb_destroy_notify_event_t *dev;
  56             d_screen_t *sc;
  57             d_window_t *w;
  58             gboolean vis;
  59
  60             dev = (xcb_destroy_notify_event_t*)ev;
  61             sc = display_screen_from_root(dpy, dev->event);
  62             if (!sc) break;
  63             w = screen_find_window(sc, dev->window);
  64             vis = window_is_mapped(w);
  65             sc->window_hide(w);
  66             screen_remove_window(sc, w);
  67             if (vis) screen_refresh(sc);
  68             break;
  69         }
  70         case XCB_REPARENT_NOTIFY:
  71         {
  72             xcb_reparent_notify_event_t *rev;
  73             d_screen_t *sc;
  74             d_window_t *w;
  75
  76             rev = (xcb_reparent_notify_event_t*)ev;
  77             sc = display_screen_from_root(dpy, rev->event);
  78             if (!sc) break;
  79             w = screen_find_window(sc, rev->window);
  80             if (rev->parent == sc->super.root)
  81                 screen_add_window(sc, rev->window);
  82             else {
  83                 sc->window_hide(w);
  84                 screen_remove_window(sc, w);
  85             }
  86             screen_refresh(w->sc);
  87             break;
  88         }
  89         case XCB_MAP_NOTIFY:
  90         {
  91             xcb_map_notify_event_t *mev;
  92             d_screen_t *sc;
  93             d_window_t *w;
  94
  95             mev = (xcb_map_notify_event_t*)ev;
  96             sc = display_screen_from_root(dpy, mev->event);
  97             if (!sc) break;
  98             w = screen_find_window(sc, mev->window);
  99             sc->window_show(w);
 100             screen_refresh(w->sc);
 101             break;
 102         }
 103         case XCB_UNMAP_NOTIFY:
 104         {
 105             xcb_unmap_notify_event_t *mev;
 106             d_screen_t *sc;
 107             d_window_t *w;
 108
 109             mev = (xcb_unmap_notify_event_t*)ev;
 110             sc = display_screen_from_root(dpy, mev->event);
 111             if (!sc) break;
 112             w = screen_find_window(sc, mev->window);
 113             sc->window_hide(w);
 114             screen_refresh(w->sc);
 115             break;
 116         }
 117         case XCB_CONFIGURE_NOTIFY:
 118         {
 119             xcb_configure_notify_event_t *cev;
 120             d_screen_t *sc;
 121             d_window_t *w, *above;
 122             int x, y, width, height, bwidth;
 123
 124             cev = (xcb_configure_notify_event_t*)ev;
 125             sc = display_screen_from_root(dpy, cev->event);
 126             if (!sc) break;
 127             w = screen_find_window(sc, cev->window);
 128             window_get_area(w, &x, &y, &width, &height, &bwidth);
 129             if (x != cev->x || y != cev->y || width != cev->width ||
 130                 height != cev->height || bwidth != cev->border_width)
 131             {
 132                 window_configure(w, cev->x, cev->y,
 133                                  cev->width, cev->height,
 134                                  cev->border_width);
 135                 if (window_is_mapped(w))
 136                     sc->window_reconfigure(w);
 137             }
 138             above = screen_find_window(sc, cev->above_sibling);
 139             screen_stacking_move_above(sc, w, above);
 140             screen_refresh(w->sc);
 141             break;
 142         }
 143         default:
 144             if (ev->response_type - dpy->damage.event == XCB_DAMAGE_NOTIFY) {
 145                 xcb_damage_notify_event_t *dev;
 146                 d_list_it_t *it;
 147
 148                 dev = (xcb_damage_notify_event_t*)ev;
 149                 for (it = list_top(dpy->screens); it; it = it->next) {
 150                     d_screen_t *sc = it->data;
 151                     d_window_t *w;
 152
 153                     w = screen_find_window(sc, dev->drawable);
 154                     if (w) {
 155                         screen_refresh(w->sc);
 156                         break;
 157                     }
 158                 }
 159                 xcb_damage_subtract(dpy->conn, dev->damage,
 160                                     XCB_NONE, XCB_NONE);
 161             }
 162             break;
 163         }
 164         free(ev);
 165         xcb_flush(dpy->conn);
 166     }
 167 }
 168
 169 static void
 170 paint(d_display_t *dpy)
 171 {
 172     d_list_it_t *it;
 173     struct timeval now;
 174
 175     gettimeofday(&now, NULL);
 176
 177     for (it = list_top(dpy->screens); it; it = it->next) {
 178         d_screen_t *sc = it->data;
 179
 180         if (time_compare(&sc->next_repaint, &now) <= 0)
 181             sc->screen_paint(sc);
 182     }
 183 }
 184
 185 static void
 186 run(d_display_t *dpy)
 187 {
 188     gboolean quit;
 189
 190     quit = FALSE;
 191     while (!quit) {
 192         struct timeval next, now, *wait;
 193         int            r, npaint;
 194         d_list_it_t   *it;
 195         fd_set         fds;
 196
 197         event(dpy);
 198
 199         npaint = 0;
 200         for (it = list_top(dpy->screens); it; it = it->next) {
 201             d_screen_t *sc = it->data;
 202             if (sc->need_repaint &&
 203                 (!npaint || time_compare(&sc->next_repaint, &next) < 0))
 204             {
 205                 next = sc->next_repaint;
 206                 ++npaint;
 207             }
 208         }
 209
 210         gettimeofday(&now, 0);
 211
 212         if (!npaint)
 213             /* wait forever, there is nothing that needs drawing */
 214             wait = NULL;
 215         else if (time_compare(&next, &now) > 0) {
 216             /* wait until the next allowed redraw time */
 217             time_difference(&next, &now, &next);
 218             wait = &next;
 219         }
 220         else {
 221             /* don't wait cuz a redraw is due now already */
 222             next.tv_sec = 0;
 223             next.tv_usec = 1;
 224             wait = &next;
 225         }
 226
 227         FD_ZERO(&fds);
 228         FD_SET(dpy->fd, &fds);
 229
 230         //printf("select %d\n", npaint);
 231
 232         r = select(dpy->fd+1, &fds, NULL, NULL, wait);
 233         if (r < 0)
 234             printf("select error\n");
 235         else if (r == 0) {
 236             //printf("select timeout\n");
 237             paint(dpy);
 238             xcb_flush(dpy->conn);
 239         }
 240
 241         if (xcb_connection_has_error(dpy->conn))
 242             quit = TRUE;
 243     }
 244 }
 245
 246 static void
 247 setup_functions(d_display_t *dpy)
 248 {
 249     d_list_it_t *it;
 250
 251     for (it = list_top(dpy->screens); it; it = it->next) {
 252         d_screen_t *sc = it->data;
 253         screen_setup_default_functions(sc);
 254
 255         /* these can be plugins.. */
 256         render_init(sc);
 257     }
 258 }
 259
 260 static void
 261 cleanup_functions(d_display_t *dpy)
 262 {
 263     d_list_it_t *it;
 264
 265     for (it = list_top(dpy->screens); it; it = it->next) {
 266         d_screen_t *sc = it->data;
 267
 268         /* these can be plugins.. */
 269         render_free(sc);
 270     }
 271 }
 272
 273 int
 274 main(int argc, char **argv)
 275 {
 276     d_display_t         *dpy;
 277     d_options_t          opts;
 278
 279     read_options(argc, argv, &opts);
 280
 281     dpy = display_open(NULL);
 282     if (!dpy) {
 283         printf(_("Unable to connect to display\n"));
 284         return 1;
 285     }
 286
 287     if (!dpy->composite.present) {
 288         printf(_("no composite extension present on the display\n"));
 289         display_unref(dpy);
 290         return 1;
 291     }
 292     if (!dpy->xfixes.present) {
 293         printf(_("no xfixes extension present on the display\n"));
 294         display_unref(dpy);
 295         return 1;
 296     }
 297     if (!dpy->damage.present) {
 298         printf(_("no damage extension present on the display\n"));
 299         display_unref(dpy);
 300         return 1;
 301     }
 302     if (!dpy->render.present) {
 303         printf(_("no render extension present on the display\n"));
 304         display_unref(dpy);
 305         return 1;
 306     }
 307     if (dpy->composite.major_version <= 0 && dpy->composite.minor_version < 3)
 308     {
 309         printf(_("composite extension does not support the overlay window"));
 310         display_unref(dpy);
 311         return 1;
 312     }
 313
 314     if (!display_claim_screens(dpy)) {
 315         printf(_("found no screens to run on\n"));
 316         display_unref(dpy);
 317         return 0;
 318     }
 319
 320     setup_functions(dpy);
 321
 322     {
 323         /* some of the windows may already be visible */
 324         d_list_it_t *sc_it;
 325
 326         for (sc_it = list_top(dpy->screens); sc_it; sc_it = sc_it->next) {
 327             d_screen_t *sc = sc_it->data;
 328             d_list_it_t *it;
 329             for (it = list_top(sc->stacking); it; it = it->next)
 330                 if (window_is_mapped(it->data))
 331                     sc->window_show(it->data);
 332         }
 333     }
 334
 335     run(dpy);
 336
 337     cleanup_functions(dpy);
 338
 339     display_unref(dpy);
 340     return 0;
 341 }