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_seat *seat;
  89         struct wl_pointer *pointer;
  90         struct wl_keyboard *keyboard;
  91         struct wl_touch *touch;
  92         struct wl_list link;
  93 };
  94
  95
  96 static int
  97 texture_border(struct wayland_output *output)
  98 {
  99         struct wayland_compositor *c =
 100                 (struct wayland_compositor *) output->base.compositor;
 101         GLfloat *d;
 102         unsigned int *p;
 103         int i, j, k, n;
 104         GLfloat x[4], y[4], u[4], v[4];
 105
 106         x[0] = -c->border.left;
 107         x[1] = 0;
 108         x[2] = output->base.current->width;
 109         x[3] = output->base.current->width + c->border.right;
 110
 111         y[0] = -c->border.top;
 112         y[1] = 0;
 113         y[2] = output->base.current->height;
 114         y[3] = output->base.current->height + c->border.bottom;
 115
 116         u[0] = 0.0;
 117         u[1] = (GLfloat) c->border.left / c->border.width;
 118         u[2] = (GLfloat) (c->border.width - c->border.right) / c->border.width;
 119         u[3] = 1.0;
 120
 121         v[0] = 0.0;
 122         v[1] = (GLfloat) c->border.top / c->border.height;
 123         v[2] = (GLfloat) (c->border.height - c->border.bottom) / c->border.height;
 124         v[3] = 1.0;
 125
 126         n = 8;
 127         d = wl_array_add(&c->base.vertices, n * 16 * sizeof *d);
 128         p = wl_array_add(&c->base.indices, n * 6 * sizeof *p);
 129
 130         k = 0;
 131         for (i = 0; i < 3; i++)
 132                 for (j = 0; j < 3; j++) {
 133
 134                         if (i == 1 && j == 1)
 135                                 continue;
 136
 137                         d[ 0] = x[i];
 138                         d[ 1] = y[j];
 139                         d[ 2] = u[i];
 140                         d[ 3] = v[j];
 141
 142                         d[ 4] = x[i];
 143                         d[ 5] = y[j + 1];
 144                         d[ 6] = u[i];
 145                         d[ 7] = v[j + 1];
 146
 147                         d[ 8] = x[i + 1];
 148                         d[ 9] = y[j];
 149                         d[10] = u[i + 1];
 150                         d[11] = v[j];
 151
 152                         d[12] = x[i + 1];
 153                         d[13] = y[j + 1];
 154                         d[14] = u[i + 1];
 155                         d[15] = v[j + 1];
 156
 157                         p[0] = k + 0;
 158                         p[1] = k + 1;
 159                         p[2] = k + 2;
 160                         p[3] = k + 2;
 161                         p[4] = k + 1;
 162                         p[5] = k + 3;
 163
 164                         d += 16;
 165                         p += 6;
 166                         k += 4;
 167                 }
 168
 169         return k / 4;
 170 }
 171
 172 static void
 173 draw_border(struct wayland_output *output)
 174 {
 175         struct wayland_compositor *c =
 176                 (struct wayland_compositor *) output->base.compositor;
 177         struct weston_shader *shader = &c->base.texture_shader;
 178         GLfloat *v;
 179         int n;
 180
 181         glDisable(GL_BLEND);
 182         glUseProgram(shader->program);
 183         c->base.current_shader = shader;
 184
 185         glUniformMatrix4fv(shader->proj_uniform,
 186                            1, GL_FALSE, output->base.matrix.d);
 187
 188         glUniform1i(shader->tex_uniform, 0);
 189         glUniform1f(shader->alpha_uniform, 1);
 190         glUniform1f(shader->texwidth_uniform, 1);
 191
 192         n = texture_border(output);
 193
 194         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 195
 196         v = c->base.vertices.data;
 197         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 198         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 199         glEnableVertexAttribArray(0);
 200         glEnableVertexAttribArray(1);
 201
 202         glDrawElements(GL_TRIANGLES, n * 6,
 203                        GL_UNSIGNED_INT, c->base.indices.data);
 204
 205         glDisableVertexAttribArray(1);
 206         glDisableVertexAttribArray(0);
 207
 208         c->base.vertices.size = 0;
 209         c->base.indices.size = 0;
 210 }
 211
 212 static void
 213 create_border(struct wayland_compositor *c)
 214 {
 215         pixman_image_t *image;
 216
 217         image = load_image(DATADIR "/weston/border.png");
 218         if (!image) {
 219                 fprintf(stderr, "could'nt load border image\n");
 220                 return;
 221         }
 222
 223         c->border.width = pixman_image_get_width(image);
 224         c->border.height = pixman_image_get_height(image);
 225
 226         glGenTextures(1, &c->border.texture);
 227         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 228         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 229         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 230         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 231         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 232
 233         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 234                      c->border.width,
 235                      c->border.height,
 236                      0, GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 237                      pixman_image_get_data(image));
 238
 239         c->border.top = 25;
 240         c->border.bottom = 50;
 241         c->border.left = 25;
 242         c->border.right = 25;
 243
 244         pixman_image_unref(image);
 245 }
 246
 247 static int
 248 wayland_input_create(struct wayland_compositor *c)
 249 {
 250         struct weston_seat *seat;
 251
 252         seat = malloc(sizeof *seat);
 253         if (seat == NULL)
 254                 return -1;
 255
 256         memset(seat, 0, sizeof *seat);
 257         weston_seat_init(seat, &c->base);
 258
 259         c->base.seat = seat;
 260
 261         return 0;
 262 }
 263
 264 static int
 265 wayland_compositor_init_egl(struct wayland_compositor *c)
 266 {
 267         EGLint major, minor;
 268         EGLint n;
 269         EGLint config_attribs[] = {
 270                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 271                 EGL_RED_SIZE, 1,
 272                 EGL_GREEN_SIZE, 1,
 273                 EGL_BLUE_SIZE, 1,
 274                 EGL_ALPHA_SIZE, 1,
 275                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 276                 EGL_NONE
 277         };
 278         static const EGLint context_attribs[] = {
 279                 EGL_CONTEXT_CLIENT_VERSION, 2,
 280                 EGL_NONE
 281         };
 282
 283         c->base.display = eglGetDisplay(c->parent.display);
 284         if (c->base.display == NULL) {
 285                 fprintf(stderr, "failed to create display\n");
 286                 return -1;
 287         }
 288
 289         if (!eglInitialize(c->base.display, &major, &minor)) {
 290                 fprintf(stderr, "failed to initialize display\n");
 291                 return -1;
 292         }
 293
 294         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 295                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 296                 return -1;
 297         }
 298         if (!eglChooseConfig(c->base.display, config_attribs,
 299                              &c->base.config, 1, &n) || n == 0) {
 300                 fprintf(stderr, "failed to choose config: %d\n", n);
 301                 return -1;
 302         }
 303
 304         c->base.context = eglCreateContext(c->base.display, c->base.config,
 305                                            EGL_NO_CONTEXT, context_attribs);
 306         if (c->base.context == NULL) {
 307                 fprintf(stderr, "failed to create context\n");
 308                 return -1;
 309         }
 310
 311         c->dummy_pixmap = wl_egl_pixmap_create(10, 10, 0);
 312         if (!c->dummy_pixmap) {
 313                 fprintf(stderr, "failure to create dummy_pixmap\n");
 314                 return -1;
 315         }
 316
 317         c->dummy_egl_surface =
 318                 eglCreatePixmapSurface(c->base.display, c->base.config,
 319                                        c->dummy_pixmap, NULL);
 320         if (!eglMakeCurrent(c->base.display, c->dummy_egl_surface,
 321                             c->dummy_egl_surface, c->base.context)) {
 322                 fprintf(stderr, "failed to make context current\n");
 323                 return -1;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static void
 330 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 331 {
 332         struct weston_output *output = data;
 333
 334         wl_callback_destroy(callback);
 335         weston_output_finish_frame(output, time);
 336 }
 337
 338 static const struct wl_callback_listener frame_listener = {
 339         frame_done
 340 };
 341
 342 static void
 343 wayland_output_repaint(struct weston_output *output_base,
 344                        pixman_region32_t *damage)
 345 {
 346         struct wayland_output *output = (struct wayland_output *) output_base;
 347         struct wayland_compositor *compositor =
 348                 (struct wayland_compositor *) output->base.compositor;
 349         struct wl_callback *callback;
 350         struct weston_surface *surface;
 351
 352         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 353                             output->egl_surface, compositor->base.context)) {
 354                 fprintf(stderr, "failed to make current\n");
 355                 return;
 356         }
 357
 358         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 359                 weston_surface_draw(surface, &output->base, damage);
 360
 361         draw_border(output);
 362
 363         weston_output_do_read_pixels(&output->base);
 364
 365         eglSwapBuffers(compositor->base.display, output->egl_surface);
 366         callback = wl_surface_frame(output->parent.surface);
 367         wl_callback_add_listener(callback, &frame_listener, output);
 368
 369         return;
 370 }
 371
 372 static void
 373 wayland_output_destroy(struct weston_output *output_base)
 374 {
 375         struct wayland_output *output = (struct wayland_output *) output_base;
 376         struct weston_compositor *ec = output->base.compositor;
 377
 378         eglDestroySurface(ec->display, output->egl_surface);
 379         wl_egl_window_destroy(output->parent.egl_window);
 380         free(output);
 381
 382         return;
 383 }
 384
 385 static int
 386 wayland_compositor_create_output(struct wayland_compositor *c,
 387                                  int width, int height)
 388 {
 389         struct wayland_output *output;
 390
 391         output = malloc(sizeof *output);
 392         if (output == NULL)
 393                 return -1;
 394         memset(output, 0, sizeof *output);
 395
 396         output->mode.flags =
 397                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 398         output->mode.width = width;
 399         output->mode.height = height;
 400         output->mode.refresh = 60;
 401         wl_list_init(&output->base.mode_list);
 402         wl_list_insert(&output->base.mode_list, &output->mode.link);
 403
 404         output->base.current = &output->mode;
 405         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 406                          WL_OUTPUT_FLIPPED);
 407
 408         output->base.border.top = c->border.top;
 409         output->base.border.bottom = c->border.bottom;
 410         output->base.border.left = c->border.left;
 411         output->base.border.right = c->border.right;
 412
 413         weston_output_move(&output->base, 0, 0);
 414
 415         output->parent.surface =
 416                 wl_compositor_create_surface(c->parent.compositor);
 417         wl_surface_set_user_data(output->parent.surface, output);
 418
 419         output->parent.egl_window =
 420                 wl_egl_window_create(output->parent.surface,
 421                                      width + c->border.left + c->border.right,
 422                                      height + c->border.top + c->border.bottom);
 423         if (!output->parent.egl_window) {
 424                 fprintf(stderr, "failure to create wl_egl_window\n");
 425                 goto cleanup_output;
 426         }
 427
 428         output->egl_surface =
 429                 eglCreateWindowSurface(c->base.display, c->base.config,
 430                                        output->parent.egl_window, NULL);
 431         if (!output->egl_surface) {
 432                 fprintf(stderr, "failed to create window surface\n");
 433                 goto cleanup_window;
 434         }
 435
 436         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 437                             output->egl_surface, c->base.context)) {
 438                 fprintf(stderr, "failed to make surface current\n");
 439                 goto cleanup_surface;
 440                 return -1;
 441         }
 442
 443         output->parent.shell_surface =
 444                 wl_shell_get_shell_surface(c->parent.shell,
 445                                            output->parent.surface);
 446         /* FIXME: add shell_surface listener for resizing */
 447         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 448
 449         output->base.origin = output->base.current;
 450         output->base.repaint = wayland_output_repaint;
 451         output->base.destroy = wayland_output_destroy;
 452         output->base.assign_planes = NULL;
 453         output->base.set_backlight = NULL;
 454         output->base.set_dpms = NULL;
 455         output->base.switch_mode = NULL;
 456
 457         wl_list_insert(c->base.output_list.prev, &output->base.link);
 458
 459         return 0;
 460
 461 cleanup_surface:
 462         eglDestroySurface(c->base.display, output->egl_surface);
 463 cleanup_window:
 464         wl_egl_window_destroy(output->parent.egl_window);
 465 cleanup_output:
 466         /* FIXME: cleanup weston_output */
 467         free(output);
 468
 469         return -1;
 470 }
 471
 472 /* Events received from the wayland-server this compositor is client of: */
 473
 474 /* parent output interface */
 475 static void
 476 display_handle_geometry(void *data,
 477                         struct wl_output *wl_output,
 478                         int x,
 479                         int y,
 480                         int physical_width,
 481                         int physical_height,
 482                         int subpixel,
 483                         const char *make,
 484                         const char *model)
 485 {
 486         struct wayland_compositor *c = data;
 487
 488         c->parent.screen_allocation.x = x;
 489         c->parent.screen_allocation.y = y;
 490 }
 491
 492 static void
 493 display_handle_mode(void *data,
 494                     struct wl_output *wl_output,
 495                     uint32_t flags,
 496                     int width,
 497                     int height,
 498                     int refresh)
 499 {
 500         struct wayland_compositor *c = data;
 501
 502         c->parent.screen_allocation.width = width;
 503         c->parent.screen_allocation.height = height;
 504 }
 505
 506 static const struct wl_output_listener output_listener = {
 507         display_handle_geometry,
 508         display_handle_mode
 509 };
 510
 511 /* parent input interface */
 512 static void
 513 input_handle_pointer_enter(void *data, struct wl_pointer *pointer,
 514                            uint32_t serial, struct wl_surface *surface,
 515                            wl_fixed_t x, wl_fixed_t y)
 516 {
 517         struct wayland_input *input = data;
 518         struct wayland_output *output;
 519         struct wayland_compositor *c = input->compositor;
 520
 521         output = wl_surface_get_user_data(surface);
 522         notify_pointer_focus(&c->base.seat->seat, &output->base, x, y);
 523         wl_pointer_attach(input->pointer, serial, NULL, 0, 0);
 524 }
 525
 526 static void
 527 input_handle_pointer_leave(void *data, struct wl_pointer *pointer,
 528                            uint32_t serial, struct wl_surface *surface)
 529 {
 530         struct wayland_input *input = data;
 531         struct wayland_compositor *c = input->compositor;
 532
 533         notify_pointer_focus(&c->base.seat->seat, NULL, 0, 0);
 534 }
 535
 536 static void
 537 input_handle_motion(void *data, struct wl_pointer *pointer,
 538                     uint32_t time, wl_fixed_t x, wl_fixed_t y)
 539 {
 540         struct wayland_input *input = data;
 541         struct wayland_compositor *c = input->compositor;
 542
 543         notify_motion(&c->base.seat->seat, time,
 544                       x - wl_fixed_from_int(c->border.left),
 545                       y - wl_fixed_from_int(c->border.top));
 546 }
 547
 548 static void
 549 input_handle_button(void *data, struct wl_pointer *pointer,
 550                     uint32_t serial, uint32_t time, uint32_t button,
 551                     uint32_t state_w)
 552 {
 553         struct wayland_input *input = data;
 554         struct wayland_compositor *c = input->compositor;
 555         enum wl_pointer_button_state state = state_w;
 556
 557         notify_button(&c->base.seat->seat, time, button, state);
 558 }
 559
 560 static void
 561 input_handle_axis(void *data, struct wl_pointer *pointer,
 562                   uint32_t time, uint32_t axis, int32_t value)
 563 {
 564         struct wayland_input *input = data;
 565         struct wayland_compositor *c = input->compositor;
 566
 567         notify_axis(&c->base.seat->seat, time, axis, value);
 568 }
 569
 570 static const struct wl_pointer_listener pointer_listener = {
 571         input_handle_pointer_enter,
 572         input_handle_pointer_leave,
 573         input_handle_motion,
 574         input_handle_button,
 575         input_handle_axis,
 576 };
 577
 578 static void
 579 input_handle_keyboard_enter(void *data,
 580                             struct wl_keyboard *keyboard,
 581                             uint32_t serial,
 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.seat->seat, keys);
 589 }
 590
 591 static void
 592 input_handle_keyboard_leave(void *data,
 593                             struct wl_keyboard *keyboard,
 594                             uint32_t serial,
 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.seat->seat, NULL);
 601 }
 602
 603 static void
 604 input_handle_key(void *data, struct wl_keyboard *keyboard,
 605                  uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
 606 {
 607         struct wayland_input *input = data;
 608         struct wayland_compositor *c = input->compositor;
 609
 610         notify_key(&c->base.seat->seat, time, key, state);
 611 }
 612
 613 static void
 614 input_handle_modifiers(void *data, struct wl_keyboard *keyboard,
 615                        uint32_t serial, uint32_t mods_depressed,
 616                        uint32_t mods_latched, uint32_t mods_locked,
 617                        uint32_t group)
 618 {
 619         /* XXX notify_modifiers(); */
 620 }
 621
 622 static const struct wl_keyboard_listener keyboard_listener = {
 623         input_handle_keyboard_enter,
 624         input_handle_keyboard_leave,
 625         input_handle_key,
 626         input_handle_modifiers,
 627 };
 628
 629 static void
 630 input_handle_capabilities(void *data, struct wl_seat *seat,
 631                           enum wl_seat_capability caps)
 632 {
 633         struct wayland_input *input = data;
 634
 635         if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
 636                 input->pointer = wl_seat_get_pointer(seat);
 637                 wl_pointer_set_user_data(input->pointer, input);
 638                 wl_pointer_add_listener(input->pointer, &pointer_listener,
 639                                         input);
 640         } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
 641                 wl_pointer_destroy(input->pointer);
 642                 input->pointer = NULL;
 643         }
 644
 645         if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !input->keyboard) {
 646                 input->keyboard = wl_seat_get_keyboard(seat);
 647                 wl_keyboard_set_user_data(input->keyboard, input);
 648                 wl_keyboard_add_listener(input->keyboard, &keyboard_listener,
 649                                          input);
 650         } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && input->keyboard) {
 651                 wl_keyboard_destroy(input->keyboard);
 652                 input->keyboard = NULL;
 653         }
 654 }
 655
 656 static const struct wl_seat_listener seat_listener = {
 657         input_handle_capabilities,
 658 };
 659
 660 static void
 661 display_add_seat(struct wayland_compositor *c, uint32_t id)
 662 {
 663         struct wayland_input *input;
 664
 665         input = malloc(sizeof *input);
 666         if (input == NULL)
 667                 return;
 668
 669         memset(input, 0, sizeof *input);
 670
 671         input->compositor = c;
 672         input->seat = wl_display_bind(c->parent.display, id,
 673                                       &wl_seat_interface);
 674         wl_list_insert(c->input_list.prev, &input->link);
 675
 676         wl_seat_add_listener(input->seat, &seat_listener, input);
 677         wl_seat_set_user_data(input->seat, input);
 678 }
 679
 680 static void
 681 display_handle_global(struct wl_display *display, uint32_t id,
 682                       const char *interface, uint32_t version, void *data)
 683 {
 684         struct wayland_compositor *c = data;
 685
 686         if (strcmp(interface, "wl_compositor") == 0) {
 687                 c->parent.compositor =
 688                         wl_display_bind(display, id, &wl_compositor_interface);
 689         } else if (strcmp(interface, "wl_output") == 0) {
 690                 c->parent.output =
 691                         wl_display_bind(display, id, &wl_output_interface);
 692                 wl_output_add_listener(c->parent.output, &output_listener, c);
 693         } else if (strcmp(interface, "wl_seat") == 0) {
 694                 display_add_seat(c, id);
 695         } else if (strcmp(interface, "wl_shell") == 0) {
 696                 c->parent.shell =
 697                         wl_display_bind(display, id, &wl_shell_interface);
 698         }
 699 }
 700
 701 static int
 702 update_event_mask(uint32_t mask, void *data)
 703 {
 704         struct wayland_compositor *c = data;
 705
 706         c->parent.event_mask = mask;
 707         if (c->parent.wl_source)
 708                 wl_event_source_fd_update(c->parent.wl_source, mask);
 709
 710         return 0;
 711 }
 712
 713 static int
 714 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 715 {
 716         struct wayland_compositor *c = data;
 717
 718         if (mask & WL_EVENT_READABLE)
 719                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 720         if (mask & WL_EVENT_WRITABLE)
 721                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 722
 723         return 1;
 724 }
 725
 726 static void
 727 wayland_destroy(struct weston_compositor *ec)
 728 {
 729         weston_compositor_shutdown(ec);
 730
 731         free(ec);
 732 }
 733
 734 static struct weston_compositor *
 735 wayland_compositor_create(struct wl_display *display,
 736                           int width, int height, const char *display_name)
 737 {
 738         struct wayland_compositor *c;
 739         struct wl_event_loop *loop;
 740         int fd;
 741
 742         c = malloc(sizeof *c);
 743         if (c == NULL)
 744                 return NULL;
 745
 746         memset(c, 0, sizeof *c);
 747
 748         c->parent.display = wl_display_connect(display_name);
 749
 750         if (c->parent.display == NULL) {
 751                 fprintf(stderr, "failed to create display: %m\n");
 752                 return NULL;
 753         }
 754
 755         wl_list_init(&c->input_list);
 756         wl_display_add_global_listener(c->parent.display,
 757                                 display_handle_global, c);
 758
 759         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 760
 761         c->base.wl_display = display;
 762         if (wayland_compositor_init_egl(c) < 0)
 763                 return NULL;
 764
 765         c->base.destroy = wayland_destroy;
 766
 767         /* Can't init base class until we have a current egl context */
 768         if (weston_compositor_init(&c->base, display) < 0)
 769                 return NULL;
 770
 771         create_border(c);
 772         if (wayland_compositor_create_output(c, width, height) < 0)
 773                 return NULL;
 774
 775         if (wayland_input_create(c) < 0)
 776                 return NULL;
 777
 778         loop = wl_display_get_event_loop(c->base.wl_display);
 779
 780         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 781         c->parent.wl_source =
 782                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 783                                      wayland_compositor_handle_event, c);
 784         if (c->parent.wl_source == NULL)
 785                 return NULL;
 786
 787         return &c->base;
 788 }
 789
 790 WL_EXPORT struct weston_compositor *
 791 backend_init(struct wl_display *display, int argc, char *argv[])
 792 {
 793         int width = 1024, height = 640;
 794         char *display_name = NULL;
 795
 796         const struct weston_option wayland_options[] = {
 797                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 798                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 799                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 800         };
 801
 802         parse_options(wayland_options,
 803                       ARRAY_LENGTH(wayland_options), argc, argv);
 804
 805         return wayland_compositor_create(display, width, height, display_name);
 806 }