src/compositor-wayland.c

   1 /*
   2  * Copyright © 2010-2011 Benjamin Franzke
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stddef.h>
  28 #define _GNU_SOURCE
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34
  35 #include <wayland-client.h>
  36 #include <wayland-egl.h>
  37
  38 #include <GLES2/gl2.h>
  39 #include <GLES2/gl2ext.h>
  40 #include <EGL/egl.h>
  41 #include <EGL/eglext.h>
  42
  43 #include "compositor.h"
  44
  45 struct wayland_compositor {
  46         struct weston_compositor         base;
  47
  48         struct {
  49                 struct wl_display *display;
  50                 struct wl_compositor *compositor;
  51                 struct wl_shell *shell;
  52                 struct wl_output *output;
  53
  54                 struct {
  55                         int32_t x, y, width, height;
  56                 } screen_allocation;
  57
  58                 struct wl_event_source *wl_source;
  59                 uint32_t event_mask;
  60         } parent;
  61
  62         struct {
  63                 int32_t top, bottom, left, right;
  64                 GLuint texture;
  65                 int32_t width, height;
  66         } border;
  67
  68         struct wl_list input_list;
  69 };
  70
  71 struct wayland_output {
  72         struct weston_output    base;
  73
  74         struct {
  75                 struct wl_surface       *surface;
  76                 struct wl_shell_surface *shell_surface;
  77                 struct wl_egl_window    *egl_window;
  78         } parent;
  79         EGLSurface egl_surface;
  80         struct weston_mode      mode;
  81 };
  82
  83 struct wayland_input {
  84         struct wayland_compositor *compositor;
  85         struct wl_input_device *input_device;
  86         struct wl_list link;
  87 };
  88
  89
  90 static int
  91 texture_border(struct wayland_output *output)
  92 {
  93         struct wayland_compositor *c =
  94                 (struct wayland_compositor *) output->base.compositor;
  95         GLfloat *d;
  96         unsigned int *p;
  97         int i, j, k, n;
  98         GLfloat x[4], y[4], u[4], v[4];
  99
 100         x[0] = -c->border.left;
 101         x[1] = 0;
 102         x[2] = output->base.current->width;
 103         x[3] = output->base.current->width + c->border.right;
 104
 105         y[0] = -c->border.top;
 106         y[1] = 0;
 107         y[2] = output->base.current->height;
 108         y[3] = output->base.current->height + c->border.bottom;
 109
 110         u[0] = 0.0;
 111         u[1] = (GLfloat) c->border.left / c->border.width;
 112         u[2] = (GLfloat) (c->border.width - c->border.right) / c->border.width;
 113         u[3] = 1.0;
 114
 115         v[0] = 0.0;
 116         v[1] = (GLfloat) c->border.top / c->border.height;
 117         v[2] = (GLfloat) (c->border.height - c->border.bottom) / c->border.height;
 118         v[3] = 1.0;
 119
 120         n = 8;
 121         d = wl_array_add(&c->base.vertices, n * 16 * sizeof *d);
 122         p = wl_array_add(&c->base.indices, n * 6 * sizeof *p);
 123
 124         k = 0;
 125         for (i = 0; i < 3; i++)
 126                 for (j = 0; j < 3; j++) {
 127
 128                         if (i == 1 && j == 1)
 129                                 continue;
 130
 131                         d[ 0] = x[i];
 132                         d[ 1] = y[j];
 133                         d[ 2] = u[i];
 134                         d[ 3] = v[j];
 135
 136                         d[ 4] = x[i];
 137                         d[ 5] = y[j + 1];
 138                         d[ 6] = u[i];
 139                         d[ 7] = v[j + 1];
 140
 141                         d[ 8] = x[i + 1];
 142                         d[ 9] = y[j];
 143                         d[10] = u[i + 1];
 144                         d[11] = v[j];
 145
 146                         d[12] = x[i + 1];
 147                         d[13] = y[j + 1];
 148                         d[14] = u[i + 1];
 149                         d[15] = v[j + 1];
 150
 151                         p[0] = k + 0;
 152                         p[1] = k + 1;
 153                         p[2] = k + 2;
 154                         p[3] = k + 2;
 155                         p[4] = k + 1;
 156                         p[5] = k + 3;
 157
 158                         d += 16;
 159                         p += 6;
 160                         k += 4;
 161                 }
 162
 163         return k / 4;
 164 }
 165
 166 static void
 167 draw_border(struct wayland_output *output)
 168 {
 169         struct wayland_compositor *c =
 170                 (struct wayland_compositor *) output->base.compositor;
 171         struct weston_shader *shader = &c->base.texture_shader;
 172         GLfloat *v;
 173         int n;
 174
 175         glDisable(GL_BLEND);
 176         glUseProgram(shader->program);
 177         c->base.current_shader = shader;
 178
 179         glUniformMatrix4fv(shader->proj_uniform,
 180                            1, GL_FALSE, output->base.matrix.d);
 181
 182         glUniform1i(shader->tex_uniform, 0);
 183         glUniform1f(shader->alpha_uniform, 1);
 184         glUniform1f(shader->texwidth_uniform, 1);
 185
 186         n = texture_border(output);
 187
 188         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 189
 190         v = c->base.vertices.data;
 191         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 192         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 193         glEnableVertexAttribArray(0);
 194         glEnableVertexAttribArray(1);
 195
 196         glDrawElements(GL_TRIANGLES, n * 6,
 197                        GL_UNSIGNED_INT, c->base.indices.data);
 198
 199         glDisableVertexAttribArray(1);
 200         glDisableVertexAttribArray(0);
 201
 202         c->base.vertices.size = 0;
 203         c->base.indices.size = 0;
 204 }
 205
 206 static void
 207 create_border(struct wayland_compositor *c)
 208 {
 209         pixman_image_t *image;
 210
 211         image = load_image(DATADIR "/weston/border.png");
 212         if (!image) {
 213                 fprintf(stderr, "could'nt load border image\n");
 214                 return;
 215         }
 216
 217         c->border.width = pixman_image_get_width(image);
 218         c->border.height = pixman_image_get_height(image);
 219
 220         glGenTextures(1, &c->border.texture);
 221         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 222         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 223         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 224         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 225         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 226
 227         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 228                      c->border.width,
 229                      c->border.height,
 230                      0, GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 231                      pixman_image_get_data(image));
 232
 233         c->border.top = 25;
 234         c->border.bottom = 50;
 235         c->border.left = 25;
 236         c->border.right = 25;
 237
 238         pixman_image_unref(image);
 239 }
 240
 241 static int
 242 wayland_input_create(struct wayland_compositor *c)
 243 {
 244         struct weston_input_device *input;
 245
 246         input = malloc(sizeof *input);
 247         if (input == NULL)
 248                 return -1;
 249
 250         memset(input, 0, sizeof *input);
 251         weston_input_device_init(input, &c->base);
 252
 253         c->base.input_device = &input->input_device;
 254
 255         return 0;
 256 }
 257
 258 static int
 259 wayland_compositor_init_egl(struct wayland_compositor *c)
 260 {
 261         EGLint major, minor;
 262         EGLint n;
 263         const char *extensions;
 264         EGLint config_attribs[] = {
 265                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 266                 EGL_RED_SIZE, 1,
 267                 EGL_GREEN_SIZE, 1,
 268                 EGL_BLUE_SIZE, 1,
 269                 EGL_ALPHA_SIZE, 1,
 270                 EGL_DEPTH_SIZE, 1,
 271                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 272                 EGL_NONE
 273         };
 274         static const EGLint context_attribs[] = {
 275                 EGL_CONTEXT_CLIENT_VERSION, 2,
 276                 EGL_NONE
 277         };
 278
 279         c->base.display = eglGetDisplay(c->parent.display);
 280         if (c->base.display == NULL) {
 281                 fprintf(stderr, "failed to create display\n");
 282                 return -1;
 283         }
 284
 285         if (!eglInitialize(c->base.display, &major, &minor)) {
 286                 fprintf(stderr, "failed to initialize display\n");
 287                 return -1;
 288         }
 289
 290         extensions = eglQueryString(c->base.display, EGL_EXTENSIONS);
 291         if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
 292                 fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
 293                 return -1;
 294         }
 295
 296         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 297                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 298                 return -1;
 299         }
 300         if (!eglChooseConfig(c->base.display, config_attribs,
 301                              &c->base.config, 1, &n) || n == 0) {
 302                 fprintf(stderr, "failed to choose config: %d\n", n);
 303                 return -1;
 304         }
 305
 306         c->base.context = eglCreateContext(c->base.display, c->base.config,
 307                                            EGL_NO_CONTEXT, context_attribs);
 308         if (c->base.context == NULL) {
 309                 fprintf(stderr, "failed to create context\n");
 310                 return -1;
 311         }
 312
 313         if (!eglMakeCurrent(c->base.display, EGL_NO_SURFACE,
 314                             EGL_NO_SURFACE, c->base.context)) {
 315                 fprintf(stderr, "failed to make context current\n");
 316                 return -1;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static void
 323 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 324 {
 325         struct weston_output *output = data;
 326
 327         wl_callback_destroy(callback);
 328         weston_output_finish_frame(output, time);
 329 }
 330
 331 static const struct wl_callback_listener frame_listener = {
 332         frame_done
 333 };
 334
 335 static void
 336 wayland_output_repaint(struct weston_output *output_base,
 337                        pixman_region32_t *damage)
 338 {
 339         struct wayland_output *output = (struct wayland_output *) output_base;
 340         struct wayland_compositor *compositor =
 341                 (struct wayland_compositor *) output->base.compositor;
 342         struct wl_callback *callback;
 343         struct weston_surface *surface;
 344
 345         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 346                             output->egl_surface, compositor->base.context)) {
 347                 fprintf(stderr, "failed to make current\n");
 348                 return;
 349         }
 350
 351         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 352                 weston_surface_draw(surface, &output->base, damage);
 353
 354         draw_border(output);
 355
 356         eglSwapBuffers(compositor->base.display, output->egl_surface);
 357         callback = wl_surface_frame(output->parent.surface);
 358         wl_callback_add_listener(callback, &frame_listener, output);
 359
 360         return;
 361 }
 362
 363 static void
 364 wayland_output_destroy(struct weston_output *output_base)
 365 {
 366         struct wayland_output *output = (struct wayland_output *) output_base;
 367         struct weston_compositor *ec = output->base.compositor;
 368
 369         eglDestroySurface(ec->display, output->egl_surface);
 370         wl_egl_window_destroy(output->parent.egl_window);
 371         free(output);
 372
 373         return;
 374 }
 375
 376 static int
 377 wayland_compositor_create_output(struct wayland_compositor *c,
 378                                  int width, int height)
 379 {
 380         struct wayland_output *output;
 381
 382         output = malloc(sizeof *output);
 383         if (output == NULL)
 384                 return -1;
 385         memset(output, 0, sizeof *output);
 386
 387         output->mode.flags =
 388                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 389         output->mode.width = width;
 390         output->mode.height = height;
 391         output->mode.refresh = 60;
 392         wl_list_init(&output->base.mode_list);
 393         wl_list_insert(&output->base.mode_list, &output->mode.link);
 394
 395         output->base.current = &output->mode;
 396         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 397                          WL_OUTPUT_FLIPPED);
 398
 399         output->base.border.top = c->border.top;
 400         output->base.border.bottom = c->border.bottom;
 401         output->base.border.left = c->border.left;
 402         output->base.border.right = c->border.right;
 403
 404         weston_output_move(&output->base, 0, 0);
 405
 406         output->parent.surface =
 407                 wl_compositor_create_surface(c->parent.compositor);
 408         wl_surface_set_user_data(output->parent.surface, output);
 409
 410         output->parent.egl_window =
 411                 wl_egl_window_create(output->parent.surface,
 412                                      width + c->border.left + c->border.right,
 413                                      height + c->border.top + c->border.bottom);
 414         if (!output->parent.egl_window) {
 415                 fprintf(stderr, "failure to create wl_egl_window\n");
 416                 goto cleanup_output;
 417         }
 418
 419         output->egl_surface =
 420                 eglCreateWindowSurface(c->base.display, c->base.config,
 421                                        output->parent.egl_window, NULL);
 422         if (!output->egl_surface) {
 423                 fprintf(stderr, "failed to create window surface\n");
 424                 goto cleanup_window;
 425         }
 426
 427         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 428                             output->egl_surface, c->base.context)) {
 429                 fprintf(stderr, "failed to make surface current\n");
 430                 goto cleanup_surface;
 431                 return -1;
 432         }
 433
 434         output->parent.shell_surface =
 435                 wl_shell_get_shell_surface(c->parent.shell,
 436                                            output->parent.surface);
 437         /* FIXME: add shell_surface listener for resizing */
 438         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 439
 440         output->base.repaint = wayland_output_repaint;
 441         output->base.destroy = wayland_output_destroy;
 442         output->base.assign_planes = NULL;
 443         output->base.set_backlight = NULL;
 444         output->base.set_dpms = NULL;
 445
 446         wl_list_insert(c->base.output_list.prev, &output->base.link);
 447
 448         return 0;
 449
 450 cleanup_surface:
 451         eglDestroySurface(c->base.display, output->egl_surface);
 452 cleanup_window:
 453         wl_egl_window_destroy(output->parent.egl_window);
 454 cleanup_output:
 455         /* FIXME: cleanup weston_output */
 456         free(output);
 457
 458         return -1;
 459 }
 460
 461 /* Events received from the wayland-server this compositor is client of: */
 462
 463 /* parent output interface */
 464 static void
 465 display_handle_geometry(void *data,
 466                         struct wl_output *wl_output,
 467                         int x,
 468                         int y,
 469                         int physical_width,
 470                         int physical_height,
 471                         int subpixel,
 472                         const char *make,
 473                         const char *model)
 474 {
 475         struct wayland_compositor *c = data;
 476
 477         c->parent.screen_allocation.x = x;
 478         c->parent.screen_allocation.y = y;
 479 }
 480
 481 static void
 482 display_handle_mode(void *data,
 483                     struct wl_output *wl_output,
 484                     uint32_t flags,
 485                     int width,
 486                     int height,
 487                     int refresh)
 488 {
 489         struct wayland_compositor *c = data;
 490
 491         c->parent.screen_allocation.width = width;
 492         c->parent.screen_allocation.height = height;
 493 }
 494
 495 static const struct wl_output_listener output_listener = {
 496         display_handle_geometry,
 497         display_handle_mode
 498 };
 499
 500 /* parent input interface */
 501 static void
 502 input_handle_motion(void *data, struct wl_input_device *input_device,
 503                     uint32_t time, int32_t sx, int32_t sy)
 504 {
 505         struct wayland_input *input = data;
 506         struct wayland_compositor *c = input->compositor;
 507
 508         notify_motion(c->base.input_device, time,
 509                       sx - c->border.left, sy - c->border.top);
 510 }
 511
 512 static void
 513 input_handle_button(void *data,
 514                      struct wl_input_device *input_device,
 515                      uint32_t time, uint32_t button, uint32_t state)
 516 {
 517         struct wayland_input *input = data;
 518         struct wayland_compositor *c = input->compositor;
 519
 520         notify_button(c->base.input_device, time, button, state);
 521 }
 522
 523 static void
 524 input_handle_key(void *data, struct wl_input_device *input_device,
 525                   uint32_t time, uint32_t key, uint32_t state)
 526 {
 527         struct wayland_input *input = data;
 528         struct wayland_compositor *c = input->compositor;
 529
 530         notify_key(c->base.input_device, time, key, state);
 531 }
 532
 533 static void
 534 input_handle_pointer_enter(void *data,
 535                            struct wl_input_device *input_device,
 536                            uint32_t time, struct wl_surface *surface,
 537                            int32_t sx, int32_t sy)
 538 {
 539         struct wayland_input *input = data;
 540         struct wayland_output *output;
 541         struct wayland_compositor *c = input->compositor;
 542
 543         output = wl_surface_get_user_data(surface);
 544         notify_pointer_focus(c->base.input_device,
 545                              time, &output->base, sx, sy);
 546         wl_input_device_attach(input->input_device, time, NULL, 0, 0);
 547 }
 548
 549 static void
 550 input_handle_pointer_leave(void *data,
 551                            struct wl_input_device *input_device,
 552                            uint32_t time, struct wl_surface *surface)
 553 {
 554         struct wayland_input *input = data;
 555         struct wayland_compositor *c = input->compositor;
 556
 557         notify_pointer_focus(c->base.input_device, time, NULL, 0, 0);
 558 }
 559
 560 static void
 561 input_handle_keyboard_enter(void *data,
 562                             struct wl_input_device *input_device,
 563                             uint32_t time,
 564                             struct wl_surface *surface,
 565                             struct wl_array *keys)
 566 {
 567         struct wayland_input *input = data;
 568         struct wayland_compositor *c = input->compositor;
 569         struct wayland_output *output;
 570
 571         output = wl_surface_get_user_data(surface);
 572         notify_keyboard_focus(c->base.input_device, time, &output->base, keys);
 573 }
 574
 575 static void
 576 input_handle_keyboard_leave(void *data,
 577                             struct wl_input_device *input_device,
 578                             uint32_t time,
 579                             struct wl_surface *surface)
 580 {
 581         struct wayland_input *input = data;
 582         struct wayland_compositor *c = input->compositor;
 583
 584         notify_keyboard_focus(c->base.input_device, time, NULL, NULL);
 585 }
 586
 587 static const struct wl_input_device_listener input_device_listener = {
 588         input_handle_motion,
 589         input_handle_button,
 590         input_handle_key,
 591         input_handle_pointer_enter,
 592         input_handle_pointer_leave,
 593         input_handle_keyboard_enter,
 594         input_handle_keyboard_leave,
 595 };
 596
 597 static void
 598 display_add_input(struct wayland_compositor *c, uint32_t id)
 599 {
 600         struct wayland_input *input;
 601
 602         input = malloc(sizeof *input);
 603         if (input == NULL)
 604                 return;
 605
 606         memset(input, 0, sizeof *input);
 607
 608         input->compositor = c;
 609         input->input_device = wl_display_bind(c->parent.display,
 610                                               id, &wl_input_device_interface);
 611         wl_list_insert(c->input_list.prev, &input->link);
 612
 613         wl_input_device_add_listener(input->input_device,
 614                                      &input_device_listener, input);
 615         wl_input_device_set_user_data(input->input_device, input);
 616 }
 617
 618 static void
 619 display_handle_global(struct wl_display *display, uint32_t id,
 620                       const char *interface, uint32_t version, void *data)
 621 {
 622         struct wayland_compositor *c = data;
 623
 624         if (strcmp(interface, "wl_compositor") == 0) {
 625                 c->parent.compositor =
 626                         wl_display_bind(display, id, &wl_compositor_interface);
 627         } else if (strcmp(interface, "wl_output") == 0) {
 628                 c->parent.output =
 629                         wl_display_bind(display, id, &wl_output_interface);
 630                 wl_output_add_listener(c->parent.output, &output_listener, c);
 631         } else if (strcmp(interface, "wl_input_device") == 0) {
 632                 display_add_input(c, id);
 633         } else if (strcmp(interface, "wl_shell") == 0) {
 634                 c->parent.shell =
 635                         wl_display_bind(display, id, &wl_shell_interface);
 636         }
 637 }
 638
 639 static int
 640 update_event_mask(uint32_t mask, void *data)
 641 {
 642         struct wayland_compositor *c = data;
 643
 644         c->parent.event_mask = mask;
 645         if (c->parent.wl_source)
 646                 wl_event_source_fd_update(c->parent.wl_source, mask);
 647
 648         return 0;
 649 }
 650
 651 static int
 652 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 653 {
 654         struct wayland_compositor *c = data;
 655
 656         if (mask & WL_EVENT_READABLE)
 657                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 658         if (mask & WL_EVENT_WRITABLE)
 659                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 660
 661         return 1;
 662 }
 663
 664 static void
 665 wayland_destroy(struct weston_compositor *ec)
 666 {
 667         weston_compositor_shutdown(ec);
 668
 669         free(ec);
 670 }
 671
 672 static struct weston_compositor *
 673 wayland_compositor_create(struct wl_display *display,
 674                           int width, int height, const char *display_name)
 675 {
 676         struct wayland_compositor *c;
 677         struct wl_event_loop *loop;
 678         int fd;
 679
 680         c = malloc(sizeof *c);
 681         if (c == NULL)
 682                 return NULL;
 683
 684         memset(c, 0, sizeof *c);
 685
 686         c->parent.display = wl_display_connect(display_name);
 687
 688         if (c->parent.display == NULL) {
 689                 fprintf(stderr, "failed to create display: %m\n");
 690                 return NULL;
 691         }
 692
 693         wl_list_init(&c->input_list);
 694         wl_display_add_global_listener(c->parent.display,
 695                                 display_handle_global, c);
 696
 697         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 698
 699         c->base.wl_display = display;
 700         if (wayland_compositor_init_egl(c) < 0)
 701                 return NULL;
 702
 703         c->base.destroy = wayland_destroy;
 704
 705         /* Can't init base class until we have a current egl context */
 706         if (weston_compositor_init(&c->base, display) < 0)
 707                 return NULL;
 708
 709         create_border(c);
 710         if (wayland_compositor_create_output(c, width, height) < 0)
 711                 return NULL;
 712
 713         if (wayland_input_create(c) < 0)
 714                 return NULL;
 715
 716         loop = wl_display_get_event_loop(c->base.wl_display);
 717
 718         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 719         c->parent.wl_source =
 720                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 721                                      wayland_compositor_handle_event, c);
 722         if (c->parent.wl_source == NULL)
 723                 return NULL;
 724
 725         return &c->base;
 726 }
 727
 728 WL_EXPORT struct weston_compositor *
 729 backend_init(struct wl_display *display, int argc, char *argv[])
 730 {
 731         int width = 1024, height = 640;
 732         char *display_name = NULL;
 733
 734         const struct weston_option wayland_options[] = {
 735                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 736                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 737                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 738         };
 739
 740         parse_options(wayland_options,
 741                       ARRAY_LENGTH(wayland_options), argc, argv);
 742
 743         return wayland_compositor_create(display, width, height, display_name);
 744 }