src/compositor-x11.c

   1 /*
   2  * Copyright © 2008-2011 Kristian Høgsberg
   3  * Copyright © 2010-2011 Intel Corporation
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stddef.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <errno.h>
  35 #include <sys/time.h>
  36 #include <linux/input.h>
  37
  38 #include <xcb/xcb.h>
  39 #include <X11/Xlib.h>
  40 #include <X11/Xlib-xcb.h>
  41
  42 #include <GLES2/gl2.h>
  43 #include <EGL/egl.h>
  44
  45 #include "compositor.h"
  46
  47 struct x11_compositor {
  48         struct weston_compositor         base;
  49
  50         Display                 *dpy;
  51         xcb_connection_t        *conn;
  52         xcb_screen_t            *screen;
  53         xcb_cursor_t             null_cursor;
  54         struct wl_array          keys;
  55         struct wl_event_source  *xcb_source;
  56         struct {
  57                 xcb_atom_t               wm_protocols;
  58                 xcb_atom_t               wm_normal_hints;
  59                 xcb_atom_t               wm_size_hints;
  60                 xcb_atom_t               wm_delete_window;
  61                 xcb_atom_t               wm_class;
  62                 xcb_atom_t               net_wm_name;
  63                 xcb_atom_t               net_wm_icon;
  64                 xcb_atom_t               net_wm_state;
  65                 xcb_atom_t               net_wm_state_fullscreen;
  66                 xcb_atom_t               string;
  67                 xcb_atom_t               utf8_string;
  68                 xcb_atom_t               cardinal;
  69         } atom;
  70 };
  71
  72 struct x11_output {
  73         struct weston_output    base;
  74
  75         xcb_window_t            window;
  76         EGLSurface              egl_surface;
  77         struct weston_mode      mode;
  78         struct wl_event_source *finish_frame_timer;
  79 };
  80
  81 struct x11_input {
  82         struct weston_input_device base;
  83 };
  84
  85
  86 static int
  87 x11_input_create(struct x11_compositor *c)
  88 {
  89         struct x11_input *input;
  90
  91         input = malloc(sizeof *input);
  92         if (input == NULL)
  93                 return -1;
  94
  95         memset(input, 0, sizeof *input);
  96         weston_input_device_init(&input->base, &c->base);
  97
  98         c->base.input_device = &input->base.input_device;
  99
 100         return 0;
 101 }
 102
 103 static int
 104 x11_compositor_init_egl(struct x11_compositor *c)
 105 {
 106         EGLint major, minor;
 107         EGLint n;
 108         const char *extensions;
 109         EGLint config_attribs[] = {
 110                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 111                 EGL_RED_SIZE, 1,
 112                 EGL_GREEN_SIZE, 1,
 113                 EGL_BLUE_SIZE, 1,
 114                 EGL_DEPTH_SIZE, 1,
 115                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 116                 EGL_NONE
 117         };
 118         static const EGLint context_attribs[] = {
 119                 EGL_CONTEXT_CLIENT_VERSION, 2,
 120                 EGL_NONE
 121         };
 122
 123         c->base.display = eglGetDisplay(c->dpy);
 124         if (c->base.display == NULL) {
 125                 fprintf(stderr, "failed to create display\n");
 126                 return -1;
 127         }
 128
 129         if (!eglInitialize(c->base.display, &major, &minor)) {
 130                 fprintf(stderr, "failed to initialize display\n");
 131                 return -1;
 132         }
 133
 134         extensions = eglQueryString(c->base.display, EGL_EXTENSIONS);
 135         if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
 136                 fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
 137                 return -1;
 138         }
 139
 140         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 141                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 142                 return -1;
 143         }
 144         if (!eglChooseConfig(c->base.display, config_attribs,
 145                              &c->base.config, 1, &n) || n == 0) {
 146                 fprintf(stderr, "failed to choose config: %d\n", n);
 147                 return -1;
 148         }
 149
 150         c->base.context = eglCreateContext(c->base.display, c->base.config,
 151                                            EGL_NO_CONTEXT, context_attribs);
 152         if (c->base.context == NULL) {
 153                 fprintf(stderr, "failed to create context\n");
 154                 return -1;
 155         }
 156
 157         if (!eglMakeCurrent(c->base.display, EGL_NO_SURFACE,
 158                             EGL_NO_SURFACE, c->base.context)) {
 159                 fprintf(stderr, "failed to make context current\n");
 160                 return -1;
 161         }
 162
 163         return 0;
 164 }
 165
 166 static int
 167 x11_output_prepare_render(struct weston_output *output_base)
 168 {
 169         struct x11_output *output = (struct x11_output *) output_base;
 170         struct weston_compositor *ec = output->base.compositor;
 171
 172         if (!eglMakeCurrent(ec->display, output->egl_surface,
 173                             output->egl_surface, ec->context)) {
 174                 fprintf(stderr, "failed to make current\n");
 175                 return -1;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int
 182 finish_frame_handler(void *data)
 183 {
 184         struct x11_output *output = data;
 185         uint32_t msec;
 186         struct timeval tv;
 187
 188         gettimeofday(&tv, NULL);
 189         msec = tv.tv_sec * 1000 + tv.tv_usec / 1000;
 190         weston_output_finish_frame(&output->base, msec);
 191
 192         return 1;
 193 }
 194
 195 static int
 196 x11_output_present(struct weston_output *output_base)
 197 {
 198         struct x11_output *output = (struct x11_output *) output_base;
 199         struct weston_compositor *ec = output->base.compositor;
 200
 201         if (x11_output_prepare_render(&output->base))
 202                 return -1;
 203
 204         eglSwapBuffers(ec->display, output->egl_surface);
 205
 206         wl_event_source_timer_update(output->finish_frame_timer, 10);
 207
 208         return 0;
 209 }
 210
 211 static int
 212 x11_output_prepare_scanout_surface(struct weston_output *output_base,
 213                                    struct weston_surface *es)
 214 {
 215         return -1;
 216 }
 217
 218 static int
 219 x11_output_set_cursor(struct weston_output *output_base,
 220                       struct weston_input_device *input)
 221 {
 222         return -1;
 223 }
 224
 225 static void
 226 x11_output_destroy(struct weston_output *output_base)
 227 {
 228         return;
 229 }
 230
 231 static void
 232 x11_output_set_wm_protocols(struct x11_output *output)
 233 {
 234         xcb_atom_t list[1];
 235         struct x11_compositor *c =
 236                 (struct x11_compositor *) output->base.compositor;
 237
 238         list[0] = c->atom.wm_delete_window;
 239         xcb_change_property (c->conn,
 240                              XCB_PROP_MODE_REPLACE,
 241                              output->window,
 242                              c->atom.wm_protocols,
 243                              XCB_ATOM_ATOM,
 244                              32,
 245                              ARRAY_LENGTH(list),
 246                              list);
 247 }
 248
 249 static void
 250 x11_output_change_state(struct x11_output *output, int add, xcb_atom_t state)
 251 {
 252         xcb_client_message_event_t event;
 253         struct x11_compositor *c =
 254                 (struct x11_compositor *) output->base.compositor;
 255         xcb_screen_iterator_t iter;
 256
 257 #define _NET_WM_STATE_REMOVE        0    /* remove/unset property */
 258 #define _NET_WM_STATE_ADD           1    /* add/set property */
 259 #define _NET_WM_STATE_TOGGLE        2    /* toggle property  */
 260
 261         memset(&event, 0, sizeof event);
 262         event.response_type = XCB_CLIENT_MESSAGE;
 263         event.format = 32;
 264         event.window = output->window;
 265         event.type = c->atom.net_wm_state;
 266
 267         event.data.data32[0] = add ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE;
 268         event.data.data32[1] = state;
 269         event.data.data32[2] = 0;
 270         event.data.data32[3] = 0;
 271         event.data.data32[4] = 0;
 272
 273         iter = xcb_setup_roots_iterator(xcb_get_setup(c->conn));
 274         xcb_send_event(c->conn, 0, iter.data->root,
 275                        XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY |
 276                        XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT,
 277                        (void *) &event);
 278 }
 279
 280
 281 struct wm_normal_hints {
 282         uint32_t flags;
 283         uint32_t pad[4];
 284         int32_t min_width, min_height;
 285         int32_t max_width, max_height;
 286         int32_t width_inc, height_inc;
 287         int32_t min_aspect_x, min_aspect_y;
 288         int32_t max_aspect_x, max_aspect_y;
 289         int32_t base_width, base_height;
 290         int32_t win_gravity;
 291 };
 292
 293 #define WM_NORMAL_HINTS_MIN_SIZE        16
 294 #define WM_NORMAL_HINTS_MAX_SIZE        32
 295
 296 static void
 297 x11_output_set_icon(struct x11_compositor *c,
 298                     struct x11_output *output, const char *filename)
 299 {
 300         uint32_t *icon, *pixels, stride;
 301         int32_t width, height;
 302
 303         pixels = weston_load_image(filename, &width, &height, &stride);
 304         if (!pixels)
 305                 return;
 306         icon = malloc(width * height * 4 + 8);
 307         if (!icon) {
 308                 free(pixels);
 309                 return;
 310         }
 311
 312         icon[0] = width;
 313         icon[1] = height;
 314         memcpy(icon + 2, pixels, width * height * 4);
 315         xcb_change_property(c->conn, XCB_PROP_MODE_REPLACE, output->window,
 316                             c->atom.net_wm_icon, c->atom.cardinal, 32,
 317                             width * height + 2, icon);
 318         free(icon);
 319         free(pixels);
 320 }
 321
 322 static int
 323 x11_compositor_create_output(struct x11_compositor *c, int x, int y,
 324                              int width, int height, int fullscreen)
 325 {
 326         static const char name[] = "Wayland Compositor";
 327         static const char class[] = "wayland-1\0Wayland Compositor";
 328         struct x11_output *output;
 329         xcb_screen_iterator_t iter;
 330         struct wm_normal_hints normal_hints;
 331         struct wl_event_loop *loop;
 332         uint32_t mask = XCB_CW_EVENT_MASK | XCB_CW_CURSOR;
 333         uint32_t values[2] = {
 334                 XCB_EVENT_MASK_KEY_PRESS |
 335                 XCB_EVENT_MASK_KEY_RELEASE |
 336                 XCB_EVENT_MASK_BUTTON_PRESS |
 337                 XCB_EVENT_MASK_BUTTON_RELEASE |
 338                 XCB_EVENT_MASK_POINTER_MOTION |
 339                 XCB_EVENT_MASK_EXPOSURE |
 340                 XCB_EVENT_MASK_STRUCTURE_NOTIFY |
 341                 XCB_EVENT_MASK_ENTER_WINDOW |
 342                 XCB_EVENT_MASK_LEAVE_WINDOW |
 343                 XCB_EVENT_MASK_KEYMAP_STATE |
 344                 XCB_EVENT_MASK_FOCUS_CHANGE,
 345                 0
 346         };
 347
 348         output = malloc(sizeof *output);
 349         if (output == NULL)
 350                 return -1;
 351
 352         memset(output, 0, sizeof *output);
 353
 354         output->mode.flags =
 355                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 356         output->mode.width = width;
 357         output->mode.height = height;
 358         output->mode.refresh = 60;
 359         wl_list_init(&output->base.mode_list);
 360         wl_list_insert(&output->base.mode_list, &output->mode.link);
 361
 362         output->base.current = &output->mode;
 363         weston_output_init(&output->base, &c->base, x, y, width, height,
 364                          WL_OUTPUT_FLIPPED);
 365
 366         values[1] = c->null_cursor;
 367         output->window = xcb_generate_id(c->conn);
 368         iter = xcb_setup_roots_iterator(xcb_get_setup(c->conn));
 369         xcb_create_window(c->conn,
 370                           XCB_COPY_FROM_PARENT,
 371                           output->window,
 372                           iter.data->root,
 373                           0, 0,
 374                           width, height,
 375                           0,
 376                           XCB_WINDOW_CLASS_INPUT_OUTPUT,
 377                           iter.data->root_visual,
 378                           mask, values);
 379
 380         /* Don't resize me. */
 381         memset(&normal_hints, 0, sizeof normal_hints);
 382         normal_hints.flags =
 383                 WM_NORMAL_HINTS_MAX_SIZE | WM_NORMAL_HINTS_MIN_SIZE;
 384         normal_hints.min_width = width;
 385         normal_hints.min_height = height;
 386         normal_hints.max_width = width;
 387         normal_hints.max_height = height;
 388         xcb_change_property (c->conn, XCB_PROP_MODE_REPLACE, output->window,
 389                              c->atom.wm_normal_hints,
 390                              c->atom.wm_size_hints, 32,
 391                              sizeof normal_hints / 4,
 392                              (uint8_t *) &normal_hints);
 393
 394         /* Set window name.  Don't bother with non-EWMH WMs. */
 395         xcb_change_property(c->conn, XCB_PROP_MODE_REPLACE, output->window,
 396                             c->atom.net_wm_name, c->atom.utf8_string, 8,
 397                             strlen(name), name);
 398         xcb_change_property(c->conn, XCB_PROP_MODE_REPLACE, output->window,
 399                             c->atom.wm_class, c->atom.string, 8,
 400                             sizeof class, class);
 401
 402         x11_output_set_icon(c, output, DATADIR "/wayland/wayland.png");
 403
 404         xcb_map_window(c->conn, output->window);
 405
 406         x11_output_set_wm_protocols(output);
 407
 408         if (fullscreen)
 409                 x11_output_change_state(output, 1,
 410                                         c->atom.net_wm_state_fullscreen);
 411
 412         output->egl_surface =
 413                 eglCreateWindowSurface(c->base.display, c->base.config,
 414                                        output->window, NULL);
 415         if (!output->egl_surface) {
 416                 fprintf(stderr, "failed to create window surface\n");
 417                 return -1;
 418         }
 419         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 420                             output->egl_surface, c->base.context)) {
 421                 fprintf(stderr, "failed to make surface current\n");
 422                 return -1;
 423         }
 424
 425         loop = wl_display_get_event_loop(c->base.wl_display);
 426         output->finish_frame_timer =
 427                 wl_event_loop_add_timer(loop, finish_frame_handler, output);
 428
 429         output->base.prepare_render = x11_output_prepare_render;
 430         output->base.present = x11_output_present;
 431         output->base.prepare_scanout_surface =
 432                 x11_output_prepare_scanout_surface;
 433         output->base.set_hardware_cursor = x11_output_set_cursor;
 434         output->base.destroy = x11_output_destroy;
 435
 436         wl_list_insert(c->base.output_list.prev, &output->base.link);
 437
 438         return 0;
 439 }
 440
 441 static struct x11_output *
 442 x11_compositor_find_output(struct x11_compositor *c, xcb_window_t window)
 443 {
 444         struct x11_output *output;
 445
 446         wl_list_for_each(output, &c->base.output_list, base.link) {
 447                 if (output->window == window)
 448                         return output;
 449         }
 450
 451         return NULL;
 452 }
 453
 454 static void
 455 x11_compositor_deliver_button_event(struct x11_compositor *c,
 456                                     xcb_generic_event_t *event, int state)
 457 {
 458         xcb_button_press_event_t *button_event =
 459                 (xcb_button_press_event_t *) event;
 460         int button;
 461
 462         switch (button_event->detail) {
 463         default:
 464                 button = button_event->detail + BTN_LEFT - 1;
 465                 break;
 466         case 2:
 467                 button = BTN_MIDDLE;
 468                 break;
 469         case 3:
 470                 button = BTN_RIGHT;
 471                 break;
 472         case 4:
 473         case 5:
 474         case 6:
 475         case 7:
 476                 /* X11 sends wheel events as buttons events.  But
 477                  * linux input treats as REL_WHEEL, therefore not
 478                  * button type at all. When we update the input
 479                  * protocol and get the 'axis' event, we'll send
 480                  * scroll events as axis events. */
 481                 return;
 482         }
 483
 484         notify_button(c->base.input_device,
 485                       weston_compositor_get_time(), button, state);
 486 }
 487
 488 static int
 489 x11_compositor_next_event(struct x11_compositor *c,
 490                           xcb_generic_event_t **event, uint32_t mask)
 491 {
 492         if (mask & WL_EVENT_READABLE) {
 493                 *event = xcb_poll_for_event(c->conn);
 494         } else {
 495 #ifdef HAVE_XCB_POLL_FOR_QUEUED_EVENT
 496                 *event = xcb_poll_for_queued_event(c->conn);
 497 #else
 498                 *event = xcb_poll_for_event(c->conn);
 499 #endif
 500         }
 501
 502         return *event != NULL;
 503 }
 504
 505 static int
 506 x11_compositor_handle_event(int fd, uint32_t mask, void *data)
 507 {
 508         struct x11_compositor *c = data;
 509         struct x11_output *output;
 510         xcb_generic_event_t *event, *prev;
 511         xcb_client_message_event_t *client_message;
 512         xcb_motion_notify_event_t *motion_notify;
 513         xcb_enter_notify_event_t *enter_notify;
 514         xcb_key_press_event_t *key_press, *key_release;
 515         xcb_keymap_notify_event_t *keymap_notify;
 516         xcb_focus_in_event_t *focus_in;
 517         xcb_atom_t atom;
 518         uint32_t *k;
 519         int i, set;
 520
 521         prev = NULL;
 522         while (x11_compositor_next_event(c, &event, mask)) {
 523                 switch (prev ? prev->response_type & ~0x80 : 0x80) {
 524                 case XCB_KEY_RELEASE:
 525                         key_release = (xcb_key_press_event_t *) prev;
 526                         key_press = (xcb_key_press_event_t *) event;
 527                         if ((event->response_type & ~0x80) == XCB_KEY_PRESS &&
 528                             key_release->time == key_press->time &&
 529                             key_release->detail == key_press->detail) {
 530                                 /* Don't deliver the held key release
 531                                  * event or the new key press event. */
 532                                 free(event);
 533                                 free(prev);
 534                                 prev = NULL;
 535                                 continue;
 536                         } else {
 537                                 /* Deliver the held key release now
 538                                  * and fall through and handle the new
 539                                  * event below. */
 540                                 notify_key(c->base.input_device,
 541                                            weston_compositor_get_time(),
 542                                            key_release->detail - 8, 0);
 543                                 free(prev);
 544                                 prev = NULL;
 545                                 break;
 546                         }
 547
 548                 case XCB_FOCUS_IN:
 549                         /* assert event is keymap_notify */
 550                         focus_in = (xcb_focus_in_event_t *) prev;
 551                         keymap_notify = (xcb_keymap_notify_event_t *) event;
 552                         c->keys.size = 0;
 553                         for (i = 0; i < ARRAY_LENGTH(keymap_notify->keys) * 8; i++) {
 554                                 set = keymap_notify->keys[i >> 3] &
 555                                         (1 << (i & 7));
 556                                 if (set) {
 557                                         k = wl_array_add(&c->keys, sizeof *k);
 558                                         *k = i;
 559                                 }
 560                         }
 561
 562                         output = x11_compositor_find_output(c, focus_in->event);
 563                         notify_keyboard_focus(c->base.input_device,
 564                                               weston_compositor_get_time(),
 565                                               &output->base, &c->keys);
 566
 567                         free(prev);
 568                         prev = NULL;
 569                         break;
 570
 571                 default:
 572                         /* No previous event held */
 573                         break;
 574                 }
 575
 576                 switch (event->response_type & ~0x80) {
 577                 case XCB_KEY_PRESS:
 578                         key_press = (xcb_key_press_event_t *) event;
 579                         notify_key(c->base.input_device,
 580                                    weston_compositor_get_time(),
 581                                    key_press->detail - 8, 1);
 582                         break;
 583                 case XCB_KEY_RELEASE:
 584                         prev = event;
 585                         break;
 586                 case XCB_BUTTON_PRESS:
 587                         x11_compositor_deliver_button_event(c, event, 1);
 588                         break;
 589                 case XCB_BUTTON_RELEASE:
 590                         x11_compositor_deliver_button_event(c, event, 0);
 591                         break;
 592                 case XCB_MOTION_NOTIFY:
 593                         motion_notify = (xcb_motion_notify_event_t *) event;
 594                         output = x11_compositor_find_output(c, motion_notify->event);
 595                         notify_motion(c->base.input_device,
 596                                       weston_compositor_get_time(),
 597                                       output->base.x + motion_notify->event_x,
 598                                       output->base.y + motion_notify->event_y);
 599                         break;
 600
 601                 case XCB_EXPOSE:
 602                         /* FIXME: schedule output repaint */
 603                         /* output = x11_compositor_find_output(c, expose->window); */
 604
 605                         weston_compositor_schedule_repaint(&c->base);
 606                         break;
 607
 608                 case XCB_ENTER_NOTIFY:
 609                         enter_notify = (xcb_enter_notify_event_t *) event;
 610                         if (enter_notify->state >= Button1Mask)
 611                                 break;
 612                         output = x11_compositor_find_output(c, enter_notify->event);
 613                         notify_pointer_focus(c->base.input_device,
 614                                              weston_compositor_get_time(),
 615                                              &output->base,
 616                                              output->base.x + enter_notify->event_x,
 617                                              output->base.y + enter_notify->event_y);
 618                         break;
 619
 620                 case XCB_LEAVE_NOTIFY:
 621                         enter_notify = (xcb_enter_notify_event_t *) event;
 622                         if (enter_notify->state >= Button1Mask)
 623                                 break;
 624                         output = x11_compositor_find_output(c, enter_notify->event);
 625                         notify_pointer_focus(c->base.input_device,
 626                                              weston_compositor_get_time(),
 627                                              NULL,
 628                                              output->base.x + enter_notify->event_x,
 629                                              output->base.y + enter_notify->event_y);
 630                         break;
 631
 632                 case XCB_CLIENT_MESSAGE:
 633                         client_message = (xcb_client_message_event_t *) event;
 634                         atom = client_message->data.data32[0];
 635                         if (atom == c->atom.wm_delete_window)
 636                                 wl_display_terminate(c->base.wl_display);
 637                         break;
 638
 639                 case XCB_FOCUS_IN:
 640                         focus_in = (xcb_focus_in_event_t *) event;
 641                         if (focus_in->mode == XCB_NOTIFY_MODE_WHILE_GRABBED)
 642                                 break;
 643
 644                         prev = event;
 645                         break;
 646
 647                 case XCB_FOCUS_OUT:
 648                         focus_in = (xcb_focus_in_event_t *) event;
 649                         if (focus_in->mode == XCB_NOTIFY_MODE_WHILE_GRABBED ||
 650                             focus_in->mode == XCB_NOTIFY_MODE_UNGRAB)
 651                                 break;
 652                         notify_keyboard_focus(c->base.input_device,
 653                                               weston_compositor_get_time(),
 654                                               NULL, NULL);
 655                         break;
 656
 657                 default:
 658                         break;
 659                 }
 660
 661                 if (prev != event)
 662                         free (event);
 663         }
 664
 665         switch (prev ? prev->response_type & ~0x80 : 0x80) {
 666         case XCB_KEY_RELEASE:
 667                 key_release = (xcb_key_press_event_t *) prev;
 668                 notify_key(c->base.input_device,
 669                            weston_compositor_get_time(),
 670                            key_release->detail - 8, 0);
 671                 free(prev);
 672                 prev = NULL;
 673                 break;
 674         default:
 675                 break;
 676         }
 677
 678         return event != NULL;
 679 }
 680
 681 #define F(field) offsetof(struct x11_compositor, field)
 682
 683 static void
 684 x11_compositor_get_resources(struct x11_compositor *c)
 685 {
 686         static const struct { const char *name; int offset; } atoms[] = {
 687                 { "WM_PROTOCOLS",       F(atom.wm_protocols) },
 688                 { "WM_NORMAL_HINTS",    F(atom.wm_normal_hints) },
 689                 { "WM_SIZE_HINTS",      F(atom.wm_size_hints) },
 690                 { "WM_DELETE_WINDOW",   F(atom.wm_delete_window) },
 691                 { "WM_CLASS",           F(atom.wm_class) },
 692                 { "_NET_WM_NAME",       F(atom.net_wm_name) },
 693                 { "_NET_WM_ICON",       F(atom.net_wm_icon) },
 694                 { "_NET_WM_STATE",      F(atom.net_wm_state) },
 695                 { "_NET_WM_STATE_FULLSCREEN", F(atom.net_wm_state_fullscreen) },
 696                 { "STRING",             F(atom.string) },
 697                 { "UTF8_STRING",        F(atom.utf8_string) },
 698                 { "CARDINAL",           F(atom.cardinal) },
 699         };
 700
 701         xcb_intern_atom_cookie_t cookies[ARRAY_LENGTH(atoms)];
 702         xcb_intern_atom_reply_t *reply;
 703         xcb_pixmap_t pixmap;
 704         xcb_gc_t gc;
 705         int i;
 706         uint8_t data[] = { 0, 0, 0, 0 };
 707
 708         for (i = 0; i < ARRAY_LENGTH(atoms); i++)
 709                 cookies[i] = xcb_intern_atom (c->conn, 0,
 710                                               strlen(atoms[i].name),
 711                                               atoms[i].name);
 712
 713         for (i = 0; i < ARRAY_LENGTH(atoms); i++) {
 714                 reply = xcb_intern_atom_reply (c->conn, cookies[i], NULL);
 715                 *(xcb_atom_t *) ((char *) c + atoms[i].offset) = reply->atom;
 716                 free(reply);
 717         }
 718
 719         pixmap = xcb_generate_id(c->conn);
 720         gc = xcb_generate_id(c->conn);
 721         xcb_create_pixmap(c->conn, 1, pixmap, c->screen->root, 1, 1);
 722         xcb_create_gc(c->conn, gc, pixmap, 0, NULL);
 723         xcb_put_image(c->conn, XCB_IMAGE_FORMAT_XY_PIXMAP,
 724                       pixmap, gc, 1, 1, 0, 0, 0, 32, sizeof data, data);
 725         c->null_cursor = xcb_generate_id(c->conn);
 726         xcb_create_cursor (c->conn, c->null_cursor,
 727                            pixmap, pixmap, 0, 0, 0,  0, 0, 0,  1, 1);
 728         xcb_free_gc(c->conn, gc);
 729         xcb_free_pixmap(c->conn, pixmap);
 730 }
 731
 732 static void
 733 x11_destroy(struct weston_compositor *ec)
 734 {
 735         weston_compositor_shutdown(ec);
 736
 737         free(ec);
 738 }
 739
 740 static struct weston_compositor *
 741 x11_compositor_create(struct wl_display *display,
 742                       int width, int height, int count, int fullscreen)
 743 {
 744         struct x11_compositor *c;
 745         struct wl_event_loop *loop;
 746         xcb_screen_iterator_t s;
 747         int i, x;
 748
 749         c = malloc(sizeof *c);
 750         if (c == NULL)
 751                 return NULL;
 752
 753         memset(c, 0, sizeof *c);
 754
 755         c->dpy = XOpenDisplay(NULL);
 756         if (c->dpy == NULL)
 757                 return NULL;
 758
 759         c->conn = XGetXCBConnection(c->dpy);
 760         XSetEventQueueOwner(c->dpy, XCBOwnsEventQueue);
 761
 762         if (xcb_connection_has_error(c->conn))
 763                 return NULL;
 764
 765         s = xcb_setup_roots_iterator(xcb_get_setup(c->conn));
 766         c->screen = s.data;
 767         wl_array_init(&c->keys);
 768
 769         x11_compositor_get_resources(c);
 770
 771         c->base.wl_display = display;
 772         if (x11_compositor_init_egl(c) < 0)
 773                 return NULL;
 774
 775         c->base.destroy = x11_destroy;
 776
 777         /* Can't init base class until we have a current egl context */
 778         if (weston_compositor_init(&c->base, display) < 0)
 779                 return NULL;
 780
 781         for (i = 0, x = 0; i < count; i++) {
 782                 if (x11_compositor_create_output(c, x, 0, width, height,
 783                                                  fullscreen) < 0)
 784                         return NULL;
 785                 x += width;
 786         }
 787
 788         if (x11_input_create(c) < 0)
 789                 return NULL;
 790
 791         loop = wl_display_get_event_loop(c->base.wl_display);
 792
 793         c->xcb_source =
 794                 wl_event_loop_add_fd(loop, xcb_get_file_descriptor(c->conn),
 795                                      WL_EVENT_READABLE,
 796                                      x11_compositor_handle_event, c);
 797         wl_event_source_check(c->xcb_source);
 798
 799         return &c->base;
 800 }
 801
 802 struct weston_compositor *
 803 backend_init(struct wl_display *display, char *options);
 804
 805 WL_EXPORT struct weston_compositor *
 806 backend_init(struct wl_display *display, char *options)
 807 {
 808         int width = 1024, height = 640, fullscreen = 0, count = 1, i;
 809         char *p, *value;
 810
 811         static char * const tokens[] = {
 812                 "width", "height", "fullscreen", "output-count", NULL
 813         };
 814
 815         p = options;
 816         while (i = getsubopt(&p, tokens, &value), i != -1) {
 817                 switch (i) {
 818                 case 0:
 819                         width = strtol(value, NULL, 0);
 820                         break;
 821                 case 1:
 822                         height = strtol(value, NULL, 0);
 823                         break;
 824                 case 2:
 825                         fullscreen = 1;
 826                         break;
 827                 case 3:
 828                         count = strtol(value, NULL, 0);
 829                         break;
 830                 }
 831         }
 832
 833         return x11_compositor_create(display,
 834                                      width, height, count, fullscreen);
 835 }