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 #include <sys/mman.h>
  35
  36 #include <wayland-client.h>
  37 #include <wayland-egl.h>
  38
  39 #include <GLES2/gl2.h>
  40 #include <GLES2/gl2ext.h>
  41 #include <EGL/egl.h>
  42 #include <EGL/eglext.h>
  43
  44 #include "compositor.h"
  45 #include "../shared/image-loader.h"
  46
  47 struct wayland_compositor {
  48         struct weston_compositor         base;
  49
  50         struct {
  51                 struct wl_display *wl_display;
  52                 struct wl_registry *registry;
  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         struct wl_listener      frame_listener;
  77         struct {
  78                 struct wl_surface       *surface;
  79                 struct wl_shell_surface *shell_surface;
  80                 struct wl_egl_window    *egl_window;
  81         } parent;
  82         struct weston_mode      mode;
  83 };
  84
  85 struct wayland_input {
  86         struct weston_seat base;
  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         uint32_t key_serial;
  94         uint32_t enter_serial;
  95         int focus;
  96         struct wayland_output *output;
  97 };
  98
  99
 100 static int
 101 texture_border(struct wayland_output *output)
 102 {
 103         struct wayland_compositor *c =
 104                 (struct wayland_compositor *) output->base.compositor;
 105         GLfloat *d;
 106         unsigned int *p;
 107         int i, j, k, n;
 108         GLfloat x[4], y[4], u[4], v[4];
 109
 110         x[0] = -c->border.left;
 111         x[1] = 0;
 112         x[2] = output->base.current->width;
 113         x[3] = output->base.current->width + c->border.right;
 114
 115         y[0] = -c->border.top;
 116         y[1] = 0;
 117         y[2] = output->base.current->height;
 118         y[3] = output->base.current->height + c->border.bottom;
 119
 120         u[0] = 0.0;
 121         u[1] = (GLfloat) c->border.left / c->border.width;
 122         u[2] = (GLfloat) (c->border.width - c->border.right) / c->border.width;
 123         u[3] = 1.0;
 124
 125         v[0] = 0.0;
 126         v[1] = (GLfloat) c->border.top / c->border.height;
 127         v[2] = (GLfloat) (c->border.height - c->border.bottom) / c->border.height;
 128         v[3] = 1.0;
 129
 130         n = 8;
 131         d = wl_array_add(&c->base.vertices, n * 16 * sizeof *d);
 132         p = wl_array_add(&c->base.indices, n * 6 * sizeof *p);
 133
 134         k = 0;
 135         for (i = 0; i < 3; i++)
 136                 for (j = 0; j < 3; j++) {
 137
 138                         if (i == 1 && j == 1)
 139                                 continue;
 140
 141                         d[ 0] = x[i];
 142                         d[ 1] = y[j];
 143                         d[ 2] = u[i];
 144                         d[ 3] = v[j];
 145
 146                         d[ 4] = x[i];
 147                         d[ 5] = y[j + 1];
 148                         d[ 6] = u[i];
 149                         d[ 7] = v[j + 1];
 150
 151                         d[ 8] = x[i + 1];
 152                         d[ 9] = y[j];
 153                         d[10] = u[i + 1];
 154                         d[11] = v[j];
 155
 156                         d[12] = x[i + 1];
 157                         d[13] = y[j + 1];
 158                         d[14] = u[i + 1];
 159                         d[15] = v[j + 1];
 160
 161                         p[0] = k + 0;
 162                         p[1] = k + 1;
 163                         p[2] = k + 2;
 164                         p[3] = k + 2;
 165                         p[4] = k + 1;
 166                         p[5] = k + 3;
 167
 168                         d += 16;
 169                         p += 6;
 170                         k += 4;
 171                 }
 172
 173         return k / 4;
 174 }
 175
 176 static void
 177 draw_border(struct wayland_output *output)
 178 {
 179         struct wayland_compositor *c =
 180                 (struct wayland_compositor *) output->base.compositor;
 181         struct weston_shader *shader = &c->base.texture_shader_rgba;
 182         GLfloat *v;
 183         int n;
 184
 185         glDisable(GL_BLEND);
 186         glUseProgram(shader->program);
 187         c->base.current_shader = shader;
 188
 189         glUniformMatrix4fv(shader->proj_uniform,
 190                            1, GL_FALSE, output->base.matrix.d);
 191
 192         glUniform1i(shader->tex_uniforms[0], 0);
 193         glUniform1f(shader->alpha_uniform, 1);
 194
 195         n = texture_border(output);
 196
 197         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 198
 199         v = c->base.vertices.data;
 200         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 201         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 202         glEnableVertexAttribArray(0);
 203         glEnableVertexAttribArray(1);
 204
 205         glDrawElements(GL_TRIANGLES, n * 6,
 206                        GL_UNSIGNED_INT, c->base.indices.data);
 207
 208         glDisableVertexAttribArray(1);
 209         glDisableVertexAttribArray(0);
 210
 211         c->base.vertices.size = 0;
 212         c->base.indices.size = 0;
 213 }
 214
 215 static void
 216 create_border(struct wayland_compositor *c)
 217 {
 218         pixman_image_t *image;
 219
 220         image = load_image(DATADIR "/weston/border.png");
 221         if (!image) {
 222                 weston_log("could'nt load border image\n");
 223                 return;
 224         }
 225
 226         c->border.width = pixman_image_get_width(image);
 227         c->border.height = pixman_image_get_height(image);
 228
 229         glGenTextures(1, &c->border.texture);
 230         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 231         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 232         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 233         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 234         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 235
 236         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 237                      c->border.width,
 238                      c->border.height,
 239                      0, GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 240                      pixman_image_get_data(image));
 241
 242         pixman_image_unref(image);
 243 }
 244
 245 static int
 246 wayland_compositor_init_egl(struct wayland_compositor *c)
 247 {
 248         EGLint major, minor;
 249         EGLint n;
 250         EGLint config_attribs[] = {
 251                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 252                 EGL_RED_SIZE, 1,
 253                 EGL_GREEN_SIZE, 1,
 254                 EGL_BLUE_SIZE, 1,
 255                 EGL_ALPHA_SIZE, 1,
 256                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 257                 EGL_NONE
 258         };
 259
 260         c->base.egl_display = eglGetDisplay(c->parent.wl_display);
 261         if (c->base.egl_display == NULL) {
 262                 weston_log("failed to create display\n");
 263                 return -1;
 264         }
 265
 266         if (!eglInitialize(c->base.egl_display, &major, &minor)) {
 267                 weston_log("failed to initialize display\n");
 268                 return -1;
 269         }
 270
 271         if (!eglChooseConfig(c->base.egl_display, config_attribs,
 272                              &c->base.egl_config, 1, &n) || n == 0) {
 273                 weston_log("failed to choose config: %d\n", n);
 274                 return -1;
 275         }
 276
 277         return 0;
 278 }
 279
 280 static void
 281 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 282 {
 283         struct weston_output *output = data;
 284
 285         wl_callback_destroy(callback);
 286         weston_output_finish_frame(output, time);
 287 }
 288
 289 static const struct wl_callback_listener frame_listener = {
 290         frame_done
 291 };
 292
 293 static void
 294 wayland_output_frame_notify(struct wl_listener *listener, void *data)
 295 {
 296         struct wayland_output *output =
 297                 container_of(listener,
 298                              struct wayland_output, frame_listener);
 299
 300         draw_border(output);
 301 }
 302
 303 static void
 304 wayland_output_repaint(struct weston_output *output_base,
 305                        pixman_region32_t *damage)
 306 {
 307         struct wayland_output *output = (struct wayland_output *) output_base;
 308         struct weston_compositor *ec = output->base.compositor;
 309         struct wl_callback *callback;
 310
 311         callback = wl_surface_frame(output->parent.surface);
 312         wl_callback_add_listener(callback, &frame_listener, output);
 313
 314         ec->renderer->repaint_output(&output->base, damage);
 315
 316         pixman_region32_subtract(&ec->primary_plane.damage,
 317                                  &ec->primary_plane.damage, damage);
 318
 319 }
 320
 321 static void
 322 wayland_output_destroy(struct weston_output *output_base)
 323 {
 324         struct wayland_output *output = (struct wayland_output *) output_base;
 325         struct weston_compositor *ec = output->base.compositor;
 326
 327         eglDestroySurface(ec->egl_display, output->base.egl_surface);
 328         wl_egl_window_destroy(output->parent.egl_window);
 329         free(output);
 330
 331         return;
 332 }
 333
 334 static const struct wl_shell_surface_listener shell_surface_listener;
 335
 336 static int
 337 wayland_compositor_create_output(struct wayland_compositor *c,
 338                                  int width, int height)
 339 {
 340         struct wayland_output *output;
 341
 342         output = malloc(sizeof *output);
 343         if (output == NULL)
 344                 return -1;
 345         memset(output, 0, sizeof *output);
 346
 347         output->mode.flags =
 348                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 349         output->mode.width = width;
 350         output->mode.height = height;
 351         output->mode.refresh = 60;
 352         wl_list_init(&output->base.mode_list);
 353         wl_list_insert(&output->base.mode_list, &output->mode.link);
 354
 355         output->base.current = &output->mode;
 356         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 357                                                 WL_OUTPUT_TRANSFORM_NORMAL);
 358
 359         output->base.border.top = c->border.top;
 360         output->base.border.bottom = c->border.bottom;
 361         output->base.border.left = c->border.left;
 362         output->base.border.right = c->border.right;
 363         output->base.make = "waywayland";
 364         output->base.model = "none";
 365
 366         weston_output_move(&output->base, 0, 0);
 367
 368         output->parent.surface =
 369                 wl_compositor_create_surface(c->parent.compositor);
 370         wl_surface_set_user_data(output->parent.surface, output);
 371
 372         output->parent.egl_window =
 373                 wl_egl_window_create(output->parent.surface,
 374                                      width + c->border.left + c->border.right,
 375                                      height + c->border.top + c->border.bottom);
 376         if (!output->parent.egl_window) {
 377                 weston_log("failure to create wl_egl_window\n");
 378                 goto cleanup_output;
 379         }
 380
 381         output->base.egl_surface =
 382                 eglCreateWindowSurface(c->base.egl_display, c->base.egl_config,
 383                                        output->parent.egl_window, NULL);
 384         if (!output->base.egl_surface) {
 385                 weston_log("failed to create window surface\n");
 386                 goto cleanup_window;
 387         }
 388
 389         output->parent.shell_surface =
 390                 wl_shell_get_shell_surface(c->parent.shell,
 391                                            output->parent.surface);
 392         wl_shell_surface_add_listener(output->parent.shell_surface,
 393                                       &shell_surface_listener, output);
 394         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 395
 396         output->base.origin = output->base.current;
 397         output->base.repaint = wayland_output_repaint;
 398         output->base.destroy = wayland_output_destroy;
 399         output->base.assign_planes = NULL;
 400         output->base.set_backlight = NULL;
 401         output->base.set_dpms = NULL;
 402         output->base.switch_mode = NULL;
 403
 404         wl_list_insert(c->base.output_list.prev, &output->base.link);
 405
 406         output->frame_listener.notify = wayland_output_frame_notify;
 407         wl_signal_add(&output->base.frame_signal, &output->frame_listener);
 408
 409         return 0;
 410
 411 cleanup_window:
 412         wl_egl_window_destroy(output->parent.egl_window);
 413 cleanup_output:
 414         /* FIXME: cleanup weston_output */
 415         free(output);
 416
 417         return -1;
 418 }
 419
 420 static void
 421 shell_surface_ping(void *data, struct wl_shell_surface *shell_surface,
 422                    uint32_t serial)
 423 {
 424         wl_shell_surface_pong(shell_surface, serial);
 425 }
 426
 427 static void
 428 shell_surface_configure(void *data, struct wl_shell_surface *shell_surface,
 429                         uint32_t edges, int32_t width, int32_t height)
 430 {
 431         /* FIXME: implement resizing */
 432 }
 433
 434 static void
 435 shell_surface_popup_done(void *data, struct wl_shell_surface *shell_surface)
 436 {
 437 }
 438
 439 static const struct wl_shell_surface_listener shell_surface_listener = {
 440         shell_surface_ping,
 441         shell_surface_configure,
 442         shell_surface_popup_done
 443 };
 444
 445 /* Events received from the wayland-server this compositor is client of: */
 446
 447 /* parent output interface */
 448 static void
 449 display_handle_geometry(void *data,
 450                         struct wl_output *wl_output,
 451                         int x,
 452                         int y,
 453                         int physical_width,
 454                         int physical_height,
 455                         int subpixel,
 456                         const char *make,
 457                         const char *model,
 458                         int transform)
 459 {
 460         struct wayland_compositor *c = data;
 461
 462         c->parent.screen_allocation.x = x;
 463         c->parent.screen_allocation.y = y;
 464 }
 465
 466 static void
 467 display_handle_mode(void *data,
 468                     struct wl_output *wl_output,
 469                     uint32_t flags,
 470                     int width,
 471                     int height,
 472                     int refresh)
 473 {
 474         struct wayland_compositor *c = data;
 475
 476         c->parent.screen_allocation.width = width;
 477         c->parent.screen_allocation.height = height;
 478 }
 479
 480 static const struct wl_output_listener output_listener = {
 481         display_handle_geometry,
 482         display_handle_mode
 483 };
 484
 485 static void
 486 check_focus(struct wayland_input *input, wl_fixed_t x, wl_fixed_t y)
 487 {
 488         struct wayland_compositor *c = input->compositor;
 489         int width, height, inside;
 490
 491         width = input->output->mode.width;
 492         height = input->output->mode.height;
 493
 494         inside = c->border.left <= wl_fixed_to_int(x) &&
 495                 wl_fixed_to_int(x) < width + c->border.left &&
 496                 c->border.top <= wl_fixed_to_int(y) &&
 497                 wl_fixed_to_int(y) < height + c->border.top;
 498
 499         if (!input->focus && inside) {
 500                 notify_pointer_focus(&input->base, &input->output->base,
 501                                      x - wl_fixed_from_int(c->border.left),
 502                                      y = wl_fixed_from_int(c->border.top));
 503                 wl_pointer_set_cursor(input->pointer,
 504                                       input->enter_serial, NULL, 0, 0);
 505         } else if (input->focus && !inside) {
 506                 notify_pointer_focus(&input->base, NULL, 0, 0);
 507                 /* FIXME: Should set default cursor here. */
 508         }
 509
 510         input->focus = inside;
 511 }
 512
 513 /* parent input interface */
 514 static void
 515 input_handle_pointer_enter(void *data, struct wl_pointer *pointer,
 516                            uint32_t serial, struct wl_surface *surface,
 517                            wl_fixed_t x, wl_fixed_t y)
 518 {
 519         struct wayland_input *input = data;
 520
 521         /* XXX: If we get a modifier event immediately before the focus,
 522          *      we should try to keep the same serial. */
 523         input->enter_serial = serial;
 524         input->output = wl_surface_get_user_data(surface);
 525         check_focus(input, x, y);
 526 }
 527
 528 static void
 529 input_handle_pointer_leave(void *data, struct wl_pointer *pointer,
 530                            uint32_t serial, struct wl_surface *surface)
 531 {
 532         struct wayland_input *input = data;
 533
 534         notify_pointer_focus(&input->base, NULL, 0, 0);
 535         input->output = NULL;
 536         input->focus = 0;
 537 }
 538
 539 static void
 540 input_handle_motion(void *data, struct wl_pointer *pointer,
 541                     uint32_t time, wl_fixed_t x, wl_fixed_t y)
 542 {
 543         struct wayland_input *input = data;
 544         struct wayland_compositor *c = input->compositor;
 545
 546         check_focus(input, x, y);
 547         if (input->focus)
 548                 notify_motion(&input->base, time,
 549                               x - wl_fixed_from_int(c->border.left),
 550                               y - wl_fixed_from_int(c->border.top));
 551 }
 552
 553 static void
 554 input_handle_button(void *data, struct wl_pointer *pointer,
 555                     uint32_t serial, uint32_t time, uint32_t button,
 556                     uint32_t state_w)
 557 {
 558         struct wayland_input *input = data;
 559         enum wl_pointer_button_state state = state_w;
 560
 561         notify_button(&input->base, time, button, state);
 562 }
 563
 564 static void
 565 input_handle_axis(void *data, struct wl_pointer *pointer,
 566                   uint32_t time, uint32_t axis, wl_fixed_t value)
 567 {
 568         struct wayland_input *input = data;
 569
 570         notify_axis(&input->base, time, axis, value);
 571 }
 572
 573 static const struct wl_pointer_listener pointer_listener = {
 574         input_handle_pointer_enter,
 575         input_handle_pointer_leave,
 576         input_handle_motion,
 577         input_handle_button,
 578         input_handle_axis,
 579 };
 580
 581 static void
 582 input_handle_keymap(void *data, struct wl_keyboard *keyboard, uint32_t format,
 583                     int fd, uint32_t size)
 584 {
 585         struct wayland_input *input = data;
 586         struct xkb_keymap *keymap;
 587         char *map_str;
 588
 589         if (!data) {
 590                 close(fd);
 591                 return;
 592         }
 593
 594         if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
 595                 close(fd);
 596                 return;
 597         }
 598
 599         map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
 600         if (map_str == MAP_FAILED) {
 601                 close(fd);
 602                 return;
 603         }
 604
 605         keymap = xkb_map_new_from_string(input->compositor->base.xkb_context,
 606                                          map_str,
 607                                          XKB_KEYMAP_FORMAT_TEXT_V1,
 608                                          0);
 609         munmap(map_str, size);
 610         close(fd);
 611
 612         if (!keymap) {
 613                 weston_log("failed to compile keymap\n");
 614                 return;
 615         }
 616
 617         weston_seat_init_keyboard(&input->base, keymap);
 618         xkb_map_unref(keymap);
 619 }
 620
 621 static void
 622 input_handle_keyboard_enter(void *data,
 623                             struct wl_keyboard *keyboard,
 624                             uint32_t serial,
 625                             struct wl_surface *surface,
 626                             struct wl_array *keys)
 627 {
 628         struct wayland_input *input = data;
 629
 630         /* XXX: If we get a modifier event immediately before the focus,
 631          *      we should try to keep the same serial. */
 632         notify_keyboard_focus_in(&input->base, keys,
 633                                  STATE_UPDATE_AUTOMATIC);
 634 }
 635
 636 static void
 637 input_handle_keyboard_leave(void *data,
 638                             struct wl_keyboard *keyboard,
 639                             uint32_t serial,
 640                             struct wl_surface *surface)
 641 {
 642         struct wayland_input *input = data;
 643
 644         notify_keyboard_focus_out(&input->base);
 645 }
 646
 647 static void
 648 input_handle_key(void *data, struct wl_keyboard *keyboard,
 649                  uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
 650 {
 651         struct wayland_input *input = data;
 652
 653         input->key_serial = serial;
 654         notify_key(&input->base, time, key,
 655                    state ? WL_KEYBOARD_KEY_STATE_PRESSED :
 656                            WL_KEYBOARD_KEY_STATE_RELEASED,
 657                    STATE_UPDATE_NONE);
 658 }
 659
 660 static void
 661 input_handle_modifiers(void *data, struct wl_keyboard *keyboard,
 662                        uint32_t serial_in, uint32_t mods_depressed,
 663                        uint32_t mods_latched, uint32_t mods_locked,
 664                        uint32_t group)
 665 {
 666         struct wayland_input *input = data;
 667         struct wayland_compositor *c = input->compositor;
 668         uint32_t serial_out;
 669
 670         /* If we get a key event followed by a modifier event with the
 671          * same serial number, then we try to preserve those semantics by
 672          * reusing the same serial number on the way out too. */
 673         if (serial_in == input->key_serial)
 674                 serial_out = wl_display_get_serial(c->base.wl_display);
 675         else
 676                 serial_out = wl_display_next_serial(c->base.wl_display);
 677
 678         xkb_state_update_mask(input->base.xkb_state.state,
 679                               mods_depressed, mods_latched,
 680                               mods_locked, 0, 0, group);
 681         notify_modifiers(&input->base, serial_out);
 682 }
 683
 684 static const struct wl_keyboard_listener keyboard_listener = {
 685         input_handle_keymap,
 686         input_handle_keyboard_enter,
 687         input_handle_keyboard_leave,
 688         input_handle_key,
 689         input_handle_modifiers,
 690 };
 691
 692 static void
 693 input_handle_capabilities(void *data, struct wl_seat *seat,
 694                           enum wl_seat_capability caps)
 695 {
 696         struct wayland_input *input = data;
 697
 698         if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
 699                 input->pointer = wl_seat_get_pointer(seat);
 700                 wl_pointer_set_user_data(input->pointer, input);
 701                 wl_pointer_add_listener(input->pointer, &pointer_listener,
 702                                         input);
 703                 weston_seat_init_pointer(&input->base);
 704         } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
 705                 wl_pointer_destroy(input->pointer);
 706                 input->pointer = NULL;
 707         }
 708
 709         if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !input->keyboard) {
 710                 input->keyboard = wl_seat_get_keyboard(seat);
 711                 wl_keyboard_set_user_data(input->keyboard, input);
 712                 wl_keyboard_add_listener(input->keyboard, &keyboard_listener,
 713                                          input);
 714         } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && input->keyboard) {
 715                 wl_keyboard_destroy(input->keyboard);
 716                 input->keyboard = NULL;
 717         }
 718 }
 719
 720 static const struct wl_seat_listener seat_listener = {
 721         input_handle_capabilities,
 722 };
 723
 724 static void
 725 display_add_seat(struct wayland_compositor *c, uint32_t id)
 726 {
 727         struct wayland_input *input;
 728
 729         input = malloc(sizeof *input);
 730         if (input == NULL)
 731                 return;
 732
 733         memset(input, 0, sizeof *input);
 734
 735         weston_seat_init(&input->base, &c->base);
 736         input->compositor = c;
 737         input->seat = wl_registry_bind(c->parent.registry, id,
 738                                        &wl_seat_interface, 1);
 739         wl_list_insert(c->input_list.prev, &input->link);
 740
 741         wl_seat_add_listener(input->seat, &seat_listener, input);
 742         wl_seat_set_user_data(input->seat, input);
 743 }
 744
 745 static void
 746 registry_handle_global(void *data, struct wl_registry *registry, uint32_t name,
 747                        const char *interface, uint32_t version)
 748 {
 749         struct wayland_compositor *c = data;
 750
 751         if (strcmp(interface, "wl_compositor") == 0) {
 752                 c->parent.compositor =
 753                         wl_registry_bind(registry, name,
 754                                          &wl_compositor_interface, 1);
 755         } else if (strcmp(interface, "wl_output") == 0) {
 756                 c->parent.output =
 757                         wl_registry_bind(registry, name,
 758                                          &wl_output_interface, 1);
 759                 wl_output_add_listener(c->parent.output, &output_listener, c);
 760         } else if (strcmp(interface, "wl_shell") == 0) {
 761                 c->parent.shell =
 762                         wl_registry_bind(registry, name,
 763                                          &wl_shell_interface, 1);
 764         } else if (strcmp(interface, "wl_seat") == 0) {
 765                 display_add_seat(c, name);
 766         }
 767 }
 768
 769 static const struct wl_registry_listener registry_listener = {
 770         registry_handle_global
 771 };
 772
 773 static int
 774 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 775 {
 776         struct wayland_compositor *c = data;
 777         int count = 0;
 778
 779         if (mask & WL_EVENT_READABLE)
 780                 count = wl_display_dispatch(c->parent.wl_display);
 781         if (mask & WL_EVENT_WRITABLE)
 782                 wl_display_flush(c->parent.wl_display);
 783
 784         if (mask == 0) {
 785                 count = wl_display_dispatch_pending(c->parent.wl_display);
 786                 wl_display_flush(c->parent.wl_display);
 787         }
 788
 789         return count;
 790 }
 791
 792 static void
 793 wayland_restore(struct weston_compositor *ec)
 794 {
 795 }
 796
 797 static void
 798 wayland_destroy(struct weston_compositor *ec)
 799 {
 800         gles2_renderer_destroy(ec);
 801
 802         weston_compositor_shutdown(ec);
 803
 804         free(ec);
 805 }
 806
 807 static struct weston_compositor *
 808 wayland_compositor_create(struct wl_display *display,
 809                           int width, int height, const char *display_name,
 810                           int argc, char *argv[], const char *config_file)
 811 {
 812         struct wayland_compositor *c;
 813         struct wl_event_loop *loop;
 814         int fd;
 815
 816         c = malloc(sizeof *c);
 817         if (c == NULL)
 818                 return NULL;
 819
 820         memset(c, 0, sizeof *c);
 821
 822         if (weston_compositor_init(&c->base, display, argc, argv,
 823                                    config_file) < 0)
 824                 goto err_free;
 825
 826         c->parent.wl_display = wl_display_connect(display_name);
 827
 828         if (c->parent.wl_display == NULL) {
 829                 weston_log("failed to create display: %m\n");
 830                 goto err_compositor;
 831         }
 832
 833         wl_list_init(&c->input_list);
 834         c->parent.registry = wl_display_get_registry(c->parent.wl_display);
 835         wl_registry_add_listener(c->parent.registry, &registry_listener, c);
 836         wl_display_dispatch(c->parent.wl_display);
 837
 838         c->base.wl_display = display;
 839         if (wayland_compositor_init_egl(c) < 0)
 840                 goto err_display;
 841
 842         c->base.destroy = wayland_destroy;
 843         c->base.restore = wayland_restore;
 844
 845         c->border.top = 30;
 846         c->border.bottom = 24;
 847         c->border.left = 25;
 848         c->border.right = 26;
 849
 850         /* requires border fields */
 851         if (wayland_compositor_create_output(c, width, height) < 0)
 852                 goto err_display;
 853
 854         /* requires wayland_compositor_create_output */
 855         if (gles2_renderer_init(&c->base) < 0)
 856                 goto err_display;
 857
 858         /* requires gles2_renderer_init */
 859         create_border(c);
 860
 861         loop = wl_display_get_event_loop(c->base.wl_display);
 862
 863         fd = wl_display_get_fd(c->parent.wl_display);
 864         c->parent.wl_source =
 865                 wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
 866                                      wayland_compositor_handle_event, c);
 867         if (c->parent.wl_source == NULL)
 868                 goto err_display;
 869
 870         wl_event_source_check(c->parent.wl_source);
 871
 872         return &c->base;
 873
 874 err_display:
 875         wl_display_disconnect(c->parent.wl_display);
 876 err_compositor:
 877         weston_compositor_shutdown(&c->base);
 878 err_free:
 879         free(c);
 880         return NULL;
 881 }
 882
 883 WL_EXPORT struct weston_compositor *
 884 backend_init(struct wl_display *display, int argc, char *argv[],
 885              const char *config_file)
 886 {
 887         int width = 1024, height = 640;
 888         char *display_name = NULL;
 889
 890         const struct weston_option wayland_options[] = {
 891                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 892                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 893                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 894         };
 895
 896         parse_options(wayland_options,
 897                       ARRAY_LENGTH(wayland_options), argc, argv);
 898
 899         return wayland_compositor_create(display, width, height, display_name,
 900                                          argc, argv, config_file);
 901 }