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_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 271                 EGL_NONE
 272         };
 273         static const EGLint context_attribs[] = {
 274                 EGL_CONTEXT_CLIENT_VERSION, 2,
 275                 EGL_NONE
 276         };
 277
 278         c->base.display = eglGetDisplay(c->parent.display);
 279         if (c->base.display == NULL) {
 280                 fprintf(stderr, "failed to create display\n");
 281                 return -1;
 282         }
 283
 284         if (!eglInitialize(c->base.display, &major, &minor)) {
 285                 fprintf(stderr, "failed to initialize display\n");
 286                 return -1;
 287         }
 288
 289         extensions = eglQueryString(c->base.display, EGL_EXTENSIONS);
 290         if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
 291                 fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
 292                 return -1;
 293         }
 294
 295         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 296                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 297                 return -1;
 298         }
 299         if (!eglChooseConfig(c->base.display, config_attribs,
 300                              &c->base.config, 1, &n) || n == 0) {
 301                 fprintf(stderr, "failed to choose config: %d\n", n);
 302                 return -1;
 303         }
 304
 305         c->base.context = eglCreateContext(c->base.display, c->base.config,
 306                                            EGL_NO_CONTEXT, context_attribs);
 307         if (c->base.context == NULL) {
 308                 fprintf(stderr, "failed to create context\n");
 309                 return -1;
 310         }
 311
 312         if (!eglMakeCurrent(c->base.display, EGL_NO_SURFACE,
 313                             EGL_NO_SURFACE, c->base.context)) {
 314                 fprintf(stderr, "failed to make context current\n");
 315                 return -1;
 316         }
 317
 318         return 0;
 319 }
 320
 321 static void
 322 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 323 {
 324         struct weston_output *output = data;
 325
 326         wl_callback_destroy(callback);
 327         weston_output_finish_frame(output, time);
 328 }
 329
 330 static const struct wl_callback_listener frame_listener = {
 331         frame_done
 332 };
 333
 334 static void
 335 wayland_output_repaint(struct weston_output *output_base,
 336                        pixman_region32_t *damage)
 337 {
 338         struct wayland_output *output = (struct wayland_output *) output_base;
 339         struct wayland_compositor *compositor =
 340                 (struct wayland_compositor *) output->base.compositor;
 341         struct wl_callback *callback;
 342         struct weston_surface *surface;
 343
 344         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 345                             output->egl_surface, compositor->base.context)) {
 346                 fprintf(stderr, "failed to make current\n");
 347                 return;
 348         }
 349
 350         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 351                 weston_surface_draw(surface, &output->base, damage);
 352
 353         draw_border(output);
 354
 355         eglSwapBuffers(compositor->base.display, output->egl_surface);
 356         callback = wl_surface_frame(output->parent.surface);
 357         wl_callback_add_listener(callback, &frame_listener, output);
 358
 359         return;
 360 }
 361
 362 static void
 363 wayland_output_destroy(struct weston_output *output_base)
 364 {
 365         struct wayland_output *output = (struct wayland_output *) output_base;
 366         struct weston_compositor *ec = output->base.compositor;
 367
 368         eglDestroySurface(ec->display, output->egl_surface);
 369         wl_egl_window_destroy(output->parent.egl_window);
 370         free(output);
 371
 372         return;
 373 }
 374
 375 static int
 376 wayland_compositor_create_output(struct wayland_compositor *c,
 377                                  int width, int height)
 378 {
 379         struct wayland_output *output;
 380
 381         output = malloc(sizeof *output);
 382         if (output == NULL)
 383                 return -1;
 384         memset(output, 0, sizeof *output);
 385
 386         output->mode.flags =
 387                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 388         output->mode.width = width;
 389         output->mode.height = height;
 390         output->mode.refresh = 60;
 391         wl_list_init(&output->base.mode_list);
 392         wl_list_insert(&output->base.mode_list, &output->mode.link);
 393
 394         output->base.current = &output->mode;
 395         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 396                          WL_OUTPUT_FLIPPED);
 397
 398         output->base.border.top = c->border.top;
 399         output->base.border.bottom = c->border.bottom;
 400         output->base.border.left = c->border.left;
 401         output->base.border.right = c->border.right;
 402
 403         weston_output_move(&output->base, 0, 0);
 404
 405         output->parent.surface =
 406                 wl_compositor_create_surface(c->parent.compositor);
 407         wl_surface_set_user_data(output->parent.surface, output);
 408
 409         output->parent.egl_window =
 410                 wl_egl_window_create(output->parent.surface,
 411                                      width + c->border.left + c->border.right,
 412                                      height + c->border.top + c->border.bottom);
 413         if (!output->parent.egl_window) {
 414                 fprintf(stderr, "failure to create wl_egl_window\n");
 415                 goto cleanup_output;
 416         }
 417
 418         output->egl_surface =
 419                 eglCreateWindowSurface(c->base.display, c->base.config,
 420                                        output->parent.egl_window, NULL);
 421         if (!output->egl_surface) {
 422                 fprintf(stderr, "failed to create window surface\n");
 423                 goto cleanup_window;
 424         }
 425
 426         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 427                             output->egl_surface, c->base.context)) {
 428                 fprintf(stderr, "failed to make surface current\n");
 429                 goto cleanup_surface;
 430                 return -1;
 431         }
 432
 433         output->parent.shell_surface =
 434                 wl_shell_get_shell_surface(c->parent.shell,
 435                                            output->parent.surface);
 436         /* FIXME: add shell_surface listener for resizing */
 437         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 438
 439         output->base.repaint = wayland_output_repaint;
 440         output->base.destroy = wayland_output_destroy;
 441         output->base.assign_planes = NULL;
 442         output->base.set_backlight = NULL;
 443         output->base.set_dpms = NULL;
 444
 445         wl_list_insert(c->base.output_list.prev, &output->base.link);
 446
 447         return 0;
 448
 449 cleanup_surface:
 450         eglDestroySurface(c->base.display, output->egl_surface);
 451 cleanup_window:
 452         wl_egl_window_destroy(output->parent.egl_window);
 453 cleanup_output:
 454         /* FIXME: cleanup weston_output */
 455         free(output);
 456
 457         return -1;
 458 }
 459
 460 /* Events received from the wayland-server this compositor is client of: */
 461
 462 /* parent output interface */
 463 static void
 464 display_handle_geometry(void *data,
 465                         struct wl_output *wl_output,
 466                         int x,
 467                         int y,
 468                         int physical_width,
 469                         int physical_height,
 470                         int subpixel,
 471                         const char *make,
 472                         const char *model)
 473 {
 474         struct wayland_compositor *c = data;
 475
 476         c->parent.screen_allocation.x = x;
 477         c->parent.screen_allocation.y = y;
 478 }
 479
 480 static void
 481 display_handle_mode(void *data,
 482                     struct wl_output *wl_output,
 483                     uint32_t flags,
 484                     int width,
 485                     int height,
 486                     int refresh)
 487 {
 488         struct wayland_compositor *c = data;
 489
 490         c->parent.screen_allocation.width = width;
 491         c->parent.screen_allocation.height = height;
 492 }
 493
 494 static const struct wl_output_listener output_listener = {
 495         display_handle_geometry,
 496         display_handle_mode
 497 };
 498
 499 /* parent input interface */
 500 static void
 501 input_handle_motion(void *data, struct wl_input_device *input_device,
 502                     uint32_t time, int32_t sx, int32_t sy)
 503 {
 504         struct wayland_input *input = data;
 505         struct wayland_compositor *c = input->compositor;
 506
 507         notify_motion(c->base.input_device, time,
 508                       sx - c->border.left, sy - c->border.top);
 509 }
 510
 511 static void
 512 input_handle_button(void *data,
 513                      struct wl_input_device *input_device,
 514                      uint32_t time, uint32_t button, uint32_t state)
 515 {
 516         struct wayland_input *input = data;
 517         struct wayland_compositor *c = input->compositor;
 518
 519         notify_button(c->base.input_device, time, button, state);
 520 }
 521
 522 static void
 523 input_handle_key(void *data, struct wl_input_device *input_device,
 524                   uint32_t time, uint32_t key, uint32_t state)
 525 {
 526         struct wayland_input *input = data;
 527         struct wayland_compositor *c = input->compositor;
 528
 529         notify_key(c->base.input_device, time, key, state);
 530 }
 531
 532 static void
 533 input_handle_pointer_enter(void *data,
 534                            struct wl_input_device *input_device,
 535                            uint32_t time, struct wl_surface *surface,
 536                            int32_t sx, int32_t sy)
 537 {
 538         struct wayland_input *input = data;
 539         struct wayland_output *output;
 540         struct wayland_compositor *c = input->compositor;
 541
 542         output = wl_surface_get_user_data(surface);
 543         notify_pointer_focus(c->base.input_device,
 544                              time, &output->base, sx, sy);
 545         wl_input_device_attach(input->input_device, time, NULL, 0, 0);
 546 }
 547
 548 static void
 549 input_handle_pointer_leave(void *data,
 550                            struct wl_input_device *input_device,
 551                            uint32_t time, struct wl_surface *surface)
 552 {
 553         struct wayland_input *input = data;
 554         struct wayland_compositor *c = input->compositor;
 555
 556         notify_pointer_focus(c->base.input_device, time, NULL, 0, 0);
 557 }
 558
 559 static void
 560 input_handle_keyboard_enter(void *data,
 561                             struct wl_input_device *input_device,
 562                             uint32_t time,
 563                             struct wl_surface *surface,
 564                             struct wl_array *keys)
 565 {
 566         struct wayland_input *input = data;
 567         struct wayland_compositor *c = input->compositor;
 568         struct wayland_output *output;
 569
 570         output = wl_surface_get_user_data(surface);
 571         notify_keyboard_focus(c->base.input_device, time, &output->base, keys);
 572 }
 573
 574 static void
 575 input_handle_keyboard_leave(void *data,
 576                             struct wl_input_device *input_device,
 577                             uint32_t time,
 578                             struct wl_surface *surface)
 579 {
 580         struct wayland_input *input = data;
 581         struct wayland_compositor *c = input->compositor;
 582
 583         notify_keyboard_focus(c->base.input_device, time, NULL, NULL);
 584 }
 585
 586 static const struct wl_input_device_listener input_device_listener = {
 587         input_handle_motion,
 588         input_handle_button,
 589         input_handle_key,
 590         input_handle_pointer_enter,
 591         input_handle_pointer_leave,
 592         input_handle_keyboard_enter,
 593         input_handle_keyboard_leave,
 594 };
 595
 596 static void
 597 display_add_input(struct wayland_compositor *c, uint32_t id)
 598 {
 599         struct wayland_input *input;
 600
 601         input = malloc(sizeof *input);
 602         if (input == NULL)
 603                 return;
 604
 605         memset(input, 0, sizeof *input);
 606
 607         input->compositor = c;
 608         input->input_device = wl_display_bind(c->parent.display,
 609                                               id, &wl_input_device_interface);
 610         wl_list_insert(c->input_list.prev, &input->link);
 611
 612         wl_input_device_add_listener(input->input_device,
 613                                      &input_device_listener, input);
 614         wl_input_device_set_user_data(input->input_device, input);
 615 }
 616
 617 static void
 618 display_handle_global(struct wl_display *display, uint32_t id,
 619                       const char *interface, uint32_t version, void *data)
 620 {
 621         struct wayland_compositor *c = data;
 622
 623         if (strcmp(interface, "wl_compositor") == 0) {
 624                 c->parent.compositor =
 625                         wl_display_bind(display, id, &wl_compositor_interface);
 626         } else if (strcmp(interface, "wl_output") == 0) {
 627                 c->parent.output =
 628                         wl_display_bind(display, id, &wl_output_interface);
 629                 wl_output_add_listener(c->parent.output, &output_listener, c);
 630         } else if (strcmp(interface, "wl_input_device") == 0) {
 631                 display_add_input(c, id);
 632         } else if (strcmp(interface, "wl_shell") == 0) {
 633                 c->parent.shell =
 634                         wl_display_bind(display, id, &wl_shell_interface);
 635         }
 636 }
 637
 638 static int
 639 update_event_mask(uint32_t mask, void *data)
 640 {
 641         struct wayland_compositor *c = data;
 642
 643         c->parent.event_mask = mask;
 644         if (c->parent.wl_source)
 645                 wl_event_source_fd_update(c->parent.wl_source, mask);
 646
 647         return 0;
 648 }
 649
 650 static int
 651 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 652 {
 653         struct wayland_compositor *c = data;
 654
 655         if (mask & WL_EVENT_READABLE)
 656                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 657         if (mask & WL_EVENT_WRITABLE)
 658                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 659
 660         return 1;
 661 }
 662
 663 static void
 664 wayland_destroy(struct weston_compositor *ec)
 665 {
 666         weston_compositor_shutdown(ec);
 667
 668         free(ec);
 669 }
 670
 671 static struct weston_compositor *
 672 wayland_compositor_create(struct wl_display *display,
 673                           int width, int height, const char *display_name)
 674 {
 675         struct wayland_compositor *c;
 676         struct wl_event_loop *loop;
 677         int fd;
 678
 679         c = malloc(sizeof *c);
 680         if (c == NULL)
 681                 return NULL;
 682
 683         memset(c, 0, sizeof *c);
 684
 685         c->parent.display = wl_display_connect(display_name);
 686
 687         if (c->parent.display == NULL) {
 688                 fprintf(stderr, "failed to create display: %m\n");
 689                 return NULL;
 690         }
 691
 692         wl_list_init(&c->input_list);
 693         wl_display_add_global_listener(c->parent.display,
 694                                 display_handle_global, c);
 695
 696         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 697
 698         c->base.wl_display = display;
 699         if (wayland_compositor_init_egl(c) < 0)
 700                 return NULL;
 701
 702         c->base.destroy = wayland_destroy;
 703
 704         /* Can't init base class until we have a current egl context */
 705         if (weston_compositor_init(&c->base, display) < 0)
 706                 return NULL;
 707
 708         create_border(c);
 709         if (wayland_compositor_create_output(c, width, height) < 0)
 710                 return NULL;
 711
 712         if (wayland_input_create(c) < 0)
 713                 return NULL;
 714
 715         loop = wl_display_get_event_loop(c->base.wl_display);
 716
 717         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 718         c->parent.wl_source =
 719                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 720                                      wayland_compositor_handle_event, c);
 721         if (c->parent.wl_source == NULL)
 722                 return NULL;
 723
 724         return &c->base;
 725 }
 726
 727 WL_EXPORT struct weston_compositor *
 728 backend_init(struct wl_display *display, int argc, char *argv[])
 729 {
 730         int width = 1024, height = 640;
 731         char *display_name = NULL;
 732
 733         const struct weston_option wayland_options[] = {
 734                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 735                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 736                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 737         };
 738
 739         parse_options(wayland_options,
 740                       ARRAY_LENGTH(wayland_options), argc, argv);
 741
 742         return wayland_compositor_create(display, width, height, display_name);
 743 }