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