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 wl_egl_pixmap            *dummy_pixmap;
  49         EGLSurface                       dummy_egl_surface;;
  50
  51         struct {
  52                 struct wl_display *display;
  53                 struct wl_compositor *compositor;
  54                 struct wl_shell *shell;
  55                 struct wl_output *output;
  56
  57                 struct {
  58                         int32_t x, y, width, height;
  59                 } screen_allocation;
  60
  61                 struct wl_event_source *wl_source;
  62                 uint32_t event_mask;
  63         } parent;
  64
  65         struct {
  66                 int32_t top, bottom, left, right;
  67                 GLuint texture;
  68                 int32_t width, height;
  69         } border;
  70
  71         struct wl_list input_list;
  72 };
  73
  74 struct wayland_output {
  75         struct weston_output    base;
  76
  77         struct {
  78                 struct wl_surface       *surface;
  79                 struct wl_shell_surface *shell_surface;
  80                 struct wl_egl_window    *egl_window;
  81         } parent;
  82         EGLSurface egl_surface;
  83         struct weston_mode      mode;
  84 };
  85
  86 struct wayland_input {
  87         struct wayland_compositor *compositor;
  88         struct wl_input_device *input_device;
  89         struct wl_list link;
  90 };
  91
  92
  93 static int
  94 texture_border(struct wayland_output *output)
  95 {
  96         struct wayland_compositor *c =
  97                 (struct wayland_compositor *) output->base.compositor;
  98         GLfloat *d;
  99         unsigned int *p;
 100         int i, j, k, n;
 101         GLfloat x[4], y[4], u[4], v[4];
 102
 103         x[0] = -c->border.left;
 104         x[1] = 0;
 105         x[2] = output->base.current->width;
 106         x[3] = output->base.current->width + c->border.right;
 107
 108         y[0] = -c->border.top;
 109         y[1] = 0;
 110         y[2] = output->base.current->height;
 111         y[3] = output->base.current->height + c->border.bottom;
 112
 113         u[0] = 0.0;
 114         u[1] = (GLfloat) c->border.left / c->border.width;
 115         u[2] = (GLfloat) (c->border.width - c->border.right) / c->border.width;
 116         u[3] = 1.0;
 117
 118         v[0] = 0.0;
 119         v[1] = (GLfloat) c->border.top / c->border.height;
 120         v[2] = (GLfloat) (c->border.height - c->border.bottom) / c->border.height;
 121         v[3] = 1.0;
 122
 123         n = 8;
 124         d = wl_array_add(&c->base.vertices, n * 16 * sizeof *d);
 125         p = wl_array_add(&c->base.indices, n * 6 * sizeof *p);
 126
 127         k = 0;
 128         for (i = 0; i < 3; i++)
 129                 for (j = 0; j < 3; j++) {
 130
 131                         if (i == 1 && j == 1)
 132                                 continue;
 133
 134                         d[ 0] = x[i];
 135                         d[ 1] = y[j];
 136                         d[ 2] = u[i];
 137                         d[ 3] = v[j];
 138
 139                         d[ 4] = x[i];
 140                         d[ 5] = y[j + 1];
 141                         d[ 6] = u[i];
 142                         d[ 7] = v[j + 1];
 143
 144                         d[ 8] = x[i + 1];
 145                         d[ 9] = y[j];
 146                         d[10] = u[i + 1];
 147                         d[11] = v[j];
 148
 149                         d[12] = x[i + 1];
 150                         d[13] = y[j + 1];
 151                         d[14] = u[i + 1];
 152                         d[15] = v[j + 1];
 153
 154                         p[0] = k + 0;
 155                         p[1] = k + 1;
 156                         p[2] = k + 2;
 157                         p[3] = k + 2;
 158                         p[4] = k + 1;
 159                         p[5] = k + 3;
 160
 161                         d += 16;
 162                         p += 6;
 163                         k += 4;
 164                 }
 165
 166         return k / 4;
 167 }
 168
 169 static void
 170 draw_border(struct wayland_output *output)
 171 {
 172         struct wayland_compositor *c =
 173                 (struct wayland_compositor *) output->base.compositor;
 174         struct weston_shader *shader = &c->base.texture_shader;
 175         GLfloat *v;
 176         int n;
 177
 178         glDisable(GL_BLEND);
 179         glUseProgram(shader->program);
 180         c->base.current_shader = shader;
 181
 182         glUniformMatrix4fv(shader->proj_uniform,
 183                            1, GL_FALSE, output->base.matrix.d);
 184
 185         glUniform1i(shader->tex_uniform, 0);
 186         glUniform1f(shader->alpha_uniform, 1);
 187         glUniform1f(shader->texwidth_uniform, 1);
 188
 189         n = texture_border(output);
 190
 191         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 192
 193         v = c->base.vertices.data;
 194         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 195         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 196         glEnableVertexAttribArray(0);
 197         glEnableVertexAttribArray(1);
 198
 199         glDrawElements(GL_TRIANGLES, n * 6,
 200                        GL_UNSIGNED_INT, c->base.indices.data);
 201
 202         glDisableVertexAttribArray(1);
 203         glDisableVertexAttribArray(0);
 204
 205         c->base.vertices.size = 0;
 206         c->base.indices.size = 0;
 207 }
 208
 209 static void
 210 create_border(struct wayland_compositor *c)
 211 {
 212         pixman_image_t *image;
 213
 214         image = load_image(DATADIR "/weston/border.png");
 215         if (!image) {
 216                 fprintf(stderr, "could'nt load border image\n");
 217                 return;
 218         }
 219
 220         c->border.width = pixman_image_get_width(image);
 221         c->border.height = pixman_image_get_height(image);
 222
 223         glGenTextures(1, &c->border.texture);
 224         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 225         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 226         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 227         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 228         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 229
 230         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 231                      c->border.width,
 232                      c->border.height,
 233                      0, GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 234                      pixman_image_get_data(image));
 235
 236         c->border.top = 25;
 237         c->border.bottom = 50;
 238         c->border.left = 25;
 239         c->border.right = 25;
 240
 241         pixman_image_unref(image);
 242 }
 243
 244 static int
 245 wayland_input_create(struct wayland_compositor *c)
 246 {
 247         struct weston_input_device *input;
 248
 249         input = malloc(sizeof *input);
 250         if (input == NULL)
 251                 return -1;
 252
 253         memset(input, 0, sizeof *input);
 254         weston_input_device_init(input, &c->base);
 255
 256         c->base.input_device = &input->input_device;
 257
 258         return 0;
 259 }
 260
 261 static int
 262 wayland_compositor_init_egl(struct wayland_compositor *c)
 263 {
 264         EGLint major, minor;
 265         EGLint n;
 266         EGLint config_attribs[] = {
 267                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 268                 EGL_RED_SIZE, 1,
 269                 EGL_GREEN_SIZE, 1,
 270                 EGL_BLUE_SIZE, 1,
 271                 EGL_ALPHA_SIZE, 1,
 272                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 273                 EGL_NONE
 274         };
 275         static const EGLint context_attribs[] = {
 276                 EGL_CONTEXT_CLIENT_VERSION, 2,
 277                 EGL_NONE
 278         };
 279
 280         c->base.display = eglGetDisplay(c->parent.display);
 281         if (c->base.display == NULL) {
 282                 fprintf(stderr, "failed to create display\n");
 283                 return -1;
 284         }
 285
 286         if (!eglInitialize(c->base.display, &major, &minor)) {
 287                 fprintf(stderr, "failed to initialize display\n");
 288                 return -1;
 289         }
 290
 291         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 292                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 293                 return -1;
 294         }
 295         if (!eglChooseConfig(c->base.display, config_attribs,
 296                              &c->base.config, 1, &n) || n == 0) {
 297                 fprintf(stderr, "failed to choose config: %d\n", n);
 298                 return -1;
 299         }
 300
 301         c->base.context = eglCreateContext(c->base.display, c->base.config,
 302                                            EGL_NO_CONTEXT, context_attribs);
 303         if (c->base.context == NULL) {
 304                 fprintf(stderr, "failed to create context\n");
 305                 return -1;
 306         }
 307
 308         c->dummy_pixmap = wl_egl_pixmap_create(10, 10, 0);
 309         if (!c->dummy_pixmap) {
 310                 fprintf(stderr, "failure to create dummy_pixmap\n");
 311                 return -1;
 312         }
 313
 314         c->dummy_egl_surface =
 315                 eglCreatePixmapSurface(c->base.display, c->base.config,
 316                                        c->dummy_pixmap, NULL);
 317         if (!eglMakeCurrent(c->base.display, c->dummy_egl_surface,
 318                             c->dummy_egl_surface, c->base.context)) {
 319                 fprintf(stderr, "failed to make context current\n");
 320                 return -1;
 321         }
 322
 323         return 0;
 324 }
 325
 326 static void
 327 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 328 {
 329         struct weston_output *output = data;
 330
 331         wl_callback_destroy(callback);
 332         weston_output_finish_frame(output, time);
 333 }
 334
 335 static const struct wl_callback_listener frame_listener = {
 336         frame_done
 337 };
 338
 339 static void
 340 wayland_output_repaint(struct weston_output *output_base,
 341                        pixman_region32_t *damage)
 342 {
 343         struct wayland_output *output = (struct wayland_output *) output_base;
 344         struct wayland_compositor *compositor =
 345                 (struct wayland_compositor *) output->base.compositor;
 346         struct wl_callback *callback;
 347         struct weston_surface *surface;
 348
 349         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 350                             output->egl_surface, compositor->base.context)) {
 351                 fprintf(stderr, "failed to make current\n");
 352                 return;
 353         }
 354
 355         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 356                 weston_surface_draw(surface, &output->base, damage);
 357
 358         draw_border(output);
 359
 360         weston_output_do_read_pixels(&output->base);
 361
 362         eglSwapBuffers(compositor->base.display, output->egl_surface);
 363         callback = wl_surface_frame(output->parent.surface);
 364         wl_callback_add_listener(callback, &frame_listener, output);
 365
 366         return;
 367 }
 368
 369 static void
 370 wayland_output_destroy(struct weston_output *output_base)
 371 {
 372         struct wayland_output *output = (struct wayland_output *) output_base;
 373         struct weston_compositor *ec = output->base.compositor;
 374
 375         eglDestroySurface(ec->display, output->egl_surface);
 376         wl_egl_window_destroy(output->parent.egl_window);
 377         free(output);
 378
 379         return;
 380 }
 381
 382 static int
 383 wayland_compositor_create_output(struct wayland_compositor *c,
 384                                  int width, int height)
 385 {
 386         struct wayland_output *output;
 387
 388         output = malloc(sizeof *output);
 389         if (output == NULL)
 390                 return -1;
 391         memset(output, 0, sizeof *output);
 392
 393         output->mode.flags =
 394                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 395         output->mode.width = width;
 396         output->mode.height = height;
 397         output->mode.refresh = 60;
 398         wl_list_init(&output->base.mode_list);
 399         wl_list_insert(&output->base.mode_list, &output->mode.link);
 400
 401         output->base.current = &output->mode;
 402         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 403                          WL_OUTPUT_FLIPPED);
 404
 405         output->base.border.top = c->border.top;
 406         output->base.border.bottom = c->border.bottom;
 407         output->base.border.left = c->border.left;
 408         output->base.border.right = c->border.right;
 409
 410         weston_output_move(&output->base, 0, 0);
 411
 412         output->parent.surface =
 413                 wl_compositor_create_surface(c->parent.compositor);
 414         wl_surface_set_user_data(output->parent.surface, output);
 415
 416         output->parent.egl_window =
 417                 wl_egl_window_create(output->parent.surface,
 418                                      width + c->border.left + c->border.right,
 419                                      height + c->border.top + c->border.bottom);
 420         if (!output->parent.egl_window) {
 421                 fprintf(stderr, "failure to create wl_egl_window\n");
 422                 goto cleanup_output;
 423         }
 424
 425         output->egl_surface =
 426                 eglCreateWindowSurface(c->base.display, c->base.config,
 427                                        output->parent.egl_window, NULL);
 428         if (!output->egl_surface) {
 429                 fprintf(stderr, "failed to create window surface\n");
 430                 goto cleanup_window;
 431         }
 432
 433         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 434                             output->egl_surface, c->base.context)) {
 435                 fprintf(stderr, "failed to make surface current\n");
 436                 goto cleanup_surface;
 437                 return -1;
 438         }
 439
 440         output->parent.shell_surface =
 441                 wl_shell_get_shell_surface(c->parent.shell,
 442                                            output->parent.surface);
 443         /* FIXME: add shell_surface listener for resizing */
 444         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 445
 446         output->base.origin = output->base.current;
 447         output->base.repaint = wayland_output_repaint;
 448         output->base.destroy = wayland_output_destroy;
 449         output->base.assign_planes = NULL;
 450         output->base.set_backlight = NULL;
 451         output->base.set_dpms = NULL;
 452         output->base.switch_mode = NULL;
 453
 454         wl_list_insert(c->base.output_list.prev, &output->base.link);
 455
 456         return 0;
 457
 458 cleanup_surface:
 459         eglDestroySurface(c->base.display, output->egl_surface);
 460 cleanup_window:
 461         wl_egl_window_destroy(output->parent.egl_window);
 462 cleanup_output:
 463         /* FIXME: cleanup weston_output */
 464         free(output);
 465
 466         return -1;
 467 }
 468
 469 /* Events received from the wayland-server this compositor is client of: */
 470
 471 /* parent output interface */
 472 static void
 473 display_handle_geometry(void *data,
 474                         struct wl_output *wl_output,
 475                         int x,
 476                         int y,
 477                         int physical_width,
 478                         int physical_height,
 479                         int subpixel,
 480                         const char *make,
 481                         const char *model)
 482 {
 483         struct wayland_compositor *c = data;
 484
 485         c->parent.screen_allocation.x = x;
 486         c->parent.screen_allocation.y = y;
 487 }
 488
 489 static void
 490 display_handle_mode(void *data,
 491                     struct wl_output *wl_output,
 492                     uint32_t flags,
 493                     int width,
 494                     int height,
 495                     int refresh)
 496 {
 497         struct wayland_compositor *c = data;
 498
 499         c->parent.screen_allocation.width = width;
 500         c->parent.screen_allocation.height = height;
 501 }
 502
 503 static const struct wl_output_listener output_listener = {
 504         display_handle_geometry,
 505         display_handle_mode
 506 };
 507
 508 /* parent input interface */
 509 static void
 510 input_handle_motion(void *data, struct wl_input_device *input_device,
 511                     uint32_t time, wl_fixed_t x, wl_fixed_t y)
 512 {
 513         struct wayland_input *input = data;
 514         struct wayland_compositor *c = input->compositor;
 515
 516         notify_motion(c->base.input_device, time,
 517                       x - wl_fixed_from_int(c->border.left),
 518                       y - wl_fixed_from_int(c->border.top));
 519 }
 520
 521 static void
 522 input_handle_button(void *data,
 523                     struct wl_input_device *input_device,
 524                     uint32_t serial, uint32_t time, uint32_t button, uint32_t state)
 525 {
 526         struct wayland_input *input = data;
 527         struct wayland_compositor *c = input->compositor;
 528
 529         notify_button(c->base.input_device, time, button, state);
 530 }
 531
 532 static void
 533 input_handle_axis(void *data, struct wl_input_device *input_device,
 534                   uint32_t time, uint32_t axis, int32_t value)
 535 {
 536         struct wayland_input *input = data;
 537         struct wayland_compositor *c = input->compositor;
 538
 539         notify_axis(c->base.input_device, time, axis, value);
 540 }
 541
 542 static void
 543 input_handle_key(void *data, struct wl_input_device *input_device,
 544                  uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
 545 {
 546         struct wayland_input *input = data;
 547         struct wayland_compositor *c = input->compositor;
 548
 549         notify_key(c->base.input_device, time, key, state);
 550 }
 551
 552 static void
 553 input_handle_pointer_enter(void *data,
 554                            struct wl_input_device *input_device,
 555                            uint32_t time, struct wl_surface *surface,
 556                            wl_fixed_t x, wl_fixed_t y)
 557 {
 558         struct wayland_input *input = data;
 559         struct wayland_output *output;
 560         struct wayland_compositor *c = input->compositor;
 561
 562         output = wl_surface_get_user_data(surface);
 563         notify_pointer_focus(c->base.input_device, &output->base, x, y);
 564         wl_input_device_attach(input->input_device, time, NULL, 0, 0);
 565 }
 566
 567 static void
 568 input_handle_pointer_leave(void *data,
 569                            struct wl_input_device *input_device,
 570                            uint32_t time, struct wl_surface *surface)
 571 {
 572         struct wayland_input *input = data;
 573         struct wayland_compositor *c = input->compositor;
 574
 575         notify_pointer_focus(c->base.input_device, NULL, 0, 0);
 576 }
 577
 578 static void
 579 input_handle_keyboard_enter(void *data,
 580                             struct wl_input_device *input_device,
 581                             uint32_t time,
 582                             struct wl_surface *surface,
 583                             struct wl_array *keys)
 584 {
 585         struct wayland_input *input = data;
 586         struct wayland_compositor *c = input->compositor;
 587
 588         notify_keyboard_focus(c->base.input_device, keys);
 589 }
 590
 591 static void
 592 input_handle_keyboard_leave(void *data,
 593                             struct wl_input_device *input_device,
 594                             uint32_t time,
 595                             struct wl_surface *surface)
 596 {
 597         struct wayland_input *input = data;
 598         struct wayland_compositor *c = input->compositor;
 599
 600         notify_keyboard_focus(c->base.input_device, NULL);
 601 }
 602
 603 static const struct wl_input_device_listener input_device_listener = {
 604         input_handle_motion,
 605         input_handle_button,
 606         input_handle_axis,
 607         input_handle_key,
 608         input_handle_pointer_enter,
 609         input_handle_pointer_leave,
 610         input_handle_keyboard_enter,
 611         input_handle_keyboard_leave,
 612 };
 613
 614 static void
 615 display_add_input(struct wayland_compositor *c, uint32_t id)
 616 {
 617         struct wayland_input *input;
 618
 619         input = malloc(sizeof *input);
 620         if (input == NULL)
 621                 return;
 622
 623         memset(input, 0, sizeof *input);
 624
 625         input->compositor = c;
 626         input->input_device = wl_display_bind(c->parent.display,
 627                                               id, &wl_input_device_interface);
 628         wl_list_insert(c->input_list.prev, &input->link);
 629
 630         wl_input_device_add_listener(input->input_device,
 631                                      &input_device_listener, input);
 632         wl_input_device_set_user_data(input->input_device, input);
 633 }
 634
 635 static void
 636 display_handle_global(struct wl_display *display, uint32_t id,
 637                       const char *interface, uint32_t version, void *data)
 638 {
 639         struct wayland_compositor *c = data;
 640
 641         if (strcmp(interface, "wl_compositor") == 0) {
 642                 c->parent.compositor =
 643                         wl_display_bind(display, id, &wl_compositor_interface);
 644         } else if (strcmp(interface, "wl_output") == 0) {
 645                 c->parent.output =
 646                         wl_display_bind(display, id, &wl_output_interface);
 647                 wl_output_add_listener(c->parent.output, &output_listener, c);
 648         } else if (strcmp(interface, "wl_input_device") == 0) {
 649                 display_add_input(c, id);
 650         } else if (strcmp(interface, "wl_shell") == 0) {
 651                 c->parent.shell =
 652                         wl_display_bind(display, id, &wl_shell_interface);
 653         }
 654 }
 655
 656 static int
 657 update_event_mask(uint32_t mask, void *data)
 658 {
 659         struct wayland_compositor *c = data;
 660
 661         c->parent.event_mask = mask;
 662         if (c->parent.wl_source)
 663                 wl_event_source_fd_update(c->parent.wl_source, mask);
 664
 665         return 0;
 666 }
 667
 668 static int
 669 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 670 {
 671         struct wayland_compositor *c = data;
 672
 673         if (mask & WL_EVENT_READABLE)
 674                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 675         if (mask & WL_EVENT_WRITABLE)
 676                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 677
 678         return 1;
 679 }
 680
 681 static void
 682 wayland_destroy(struct weston_compositor *ec)
 683 {
 684         weston_compositor_shutdown(ec);
 685
 686         free(ec);
 687 }
 688
 689 static struct weston_compositor *
 690 wayland_compositor_create(struct wl_display *display,
 691                           int width, int height, const char *display_name)
 692 {
 693         struct wayland_compositor *c;
 694         struct wl_event_loop *loop;
 695         int fd;
 696
 697         c = malloc(sizeof *c);
 698         if (c == NULL)
 699                 return NULL;
 700
 701         memset(c, 0, sizeof *c);
 702
 703         c->parent.display = wl_display_connect(display_name);
 704
 705         if (c->parent.display == NULL) {
 706                 fprintf(stderr, "failed to create display: %m\n");
 707                 return NULL;
 708         }
 709
 710         wl_list_init(&c->input_list);
 711         wl_display_add_global_listener(c->parent.display,
 712                                 display_handle_global, c);
 713
 714         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 715
 716         c->base.wl_display = display;
 717         if (wayland_compositor_init_egl(c) < 0)
 718                 return NULL;
 719
 720         c->base.destroy = wayland_destroy;
 721
 722         /* Can't init base class until we have a current egl context */
 723         if (weston_compositor_init(&c->base, display) < 0)
 724                 return NULL;
 725
 726         create_border(c);
 727         if (wayland_compositor_create_output(c, width, height) < 0)
 728                 return NULL;
 729
 730         if (wayland_input_create(c) < 0)
 731                 return NULL;
 732
 733         loop = wl_display_get_event_loop(c->base.wl_display);
 734
 735         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 736         c->parent.wl_source =
 737                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 738                                      wayland_compositor_handle_event, c);
 739         if (c->parent.wl_source == NULL)
 740                 return NULL;
 741
 742         return &c->base;
 743 }
 744
 745 WL_EXPORT struct weston_compositor *
 746 backend_init(struct wl_display *display, int argc, char *argv[])
 747 {
 748         int width = 1024, height = 640;
 749         char *display_name = NULL;
 750
 751         const struct weston_option wayland_options[] = {
 752                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 753                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 754                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 755         };
 756
 757         parse_options(wayland_options,
 758                       ARRAY_LENGTH(wayland_options), argc, argv);
 759
 760         return wayland_compositor_create(display, width, height, display_name);
 761 }