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
  46 struct wayland_compositor {
  47         struct weston_compositor         base;
  48
  49         struct {
  50                 struct wl_display *wl_display;
  51                 struct wl_registry *registry;
  52                 struct wl_compositor *compositor;
  53                 struct wl_shell *shell;
  54                 struct wl_output *output;
  55
  56                 struct {
  57                         int32_t x, y, width, height;
  58                 } screen_allocation;
  59
  60                 struct wl_event_source *wl_source;
  61                 uint32_t event_mask;
  62         } parent;
  63
  64         struct {
  65                 int32_t top, bottom, left, right;
  66                 GLuint texture;
  67                 int32_t width, height;
  68         } border;
  69
  70         struct wl_list input_list;
  71 };
  72
  73 struct wayland_output {
  74         struct weston_output    base;
  75         struct wl_listener      frame_listener;
  76         struct {
  77                 struct wl_surface       *surface;
  78                 struct wl_shell_surface *shell_surface;
  79                 struct wl_egl_window    *egl_window;
  80         } parent;
  81         struct weston_mode      mode;
  82 };
  83
  84 struct wayland_input {
  85         struct weston_seat base;
  86         struct wayland_compositor *compositor;
  87         struct wl_seat *seat;
  88         struct wl_pointer *pointer;
  89         struct wl_keyboard *keyboard;
  90         struct wl_touch *touch;
  91         struct wl_list link;
  92         uint32_t key_serial;
  93         uint32_t enter_serial;
  94         int focus;
  95         struct wayland_output *output;
  96 };
  97
  98
  99 static int
 100 texture_border(struct wayland_output *output)
 101 {
 102         struct wayland_compositor *c =
 103                 (struct wayland_compositor *) output->base.compositor;
 104         GLfloat *d;
 105         unsigned int *p;
 106         int i, j, k, n;
 107         GLfloat x[4], y[4], u[4], v[4];
 108
 109         x[0] = -c->border.left;
 110         x[1] = 0;
 111         x[2] = output->base.current->width;
 112         x[3] = output->base.current->width + c->border.right;
 113
 114         y[0] = -c->border.top;
 115         y[1] = 0;
 116         y[2] = output->base.current->height;
 117         y[3] = output->base.current->height + c->border.bottom;
 118
 119         u[0] = 0.0;
 120         u[1] = (GLfloat) c->border.left / c->border.width;
 121         u[2] = (GLfloat) (c->border.width - c->border.right) / c->border.width;
 122         u[3] = 1.0;
 123
 124         v[0] = 0.0;
 125         v[1] = (GLfloat) c->border.top / c->border.height;
 126         v[2] = (GLfloat) (c->border.height - c->border.bottom) / c->border.height;
 127         v[3] = 1.0;
 128
 129         n = 8;
 130         d = wl_array_add(&c->base.vertices, n * 16 * sizeof *d);
 131         p = wl_array_add(&c->base.indices, n * 6 * sizeof *p);
 132
 133         k = 0;
 134         for (i = 0; i < 3; i++)
 135                 for (j = 0; j < 3; j++) {
 136
 137                         if (i == 1 && j == 1)
 138                                 continue;
 139
 140                         d[ 0] = x[i];
 141                         d[ 1] = y[j];
 142                         d[ 2] = u[i];
 143                         d[ 3] = v[j];
 144
 145                         d[ 4] = x[i];
 146                         d[ 5] = y[j + 1];
 147                         d[ 6] = u[i];
 148                         d[ 7] = v[j + 1];
 149
 150                         d[ 8] = x[i + 1];
 151                         d[ 9] = y[j];
 152                         d[10] = u[i + 1];
 153                         d[11] = v[j];
 154
 155                         d[12] = x[i + 1];
 156                         d[13] = y[j + 1];
 157                         d[14] = u[i + 1];
 158                         d[15] = v[j + 1];
 159
 160                         p[0] = k + 0;
 161                         p[1] = k + 1;
 162                         p[2] = k + 2;
 163                         p[3] = k + 2;
 164                         p[4] = k + 1;
 165                         p[5] = k + 3;
 166
 167                         d += 16;
 168                         p += 6;
 169                         k += 4;
 170                 }
 171
 172         return k / 4;
 173 }
 174
 175 static void
 176 draw_border(struct wayland_output *output)
 177 {
 178         struct wayland_compositor *c =
 179                 (struct wayland_compositor *) output->base.compositor;
 180         struct weston_shader *shader = &c->base.texture_shader_rgba;
 181         GLfloat *v;
 182         int n;
 183
 184         glDisable(GL_BLEND);
 185         glUseProgram(shader->program);
 186         c->base.current_shader = shader;
 187
 188         glUniformMatrix4fv(shader->proj_uniform,
 189                            1, GL_FALSE, output->base.matrix.d);
 190
 191         glUniform1i(shader->tex_uniforms[0], 0);
 192         glUniform1f(shader->alpha_uniform, 1);
 193
 194         n = texture_border(output);
 195
 196         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 197
 198         v = c->base.vertices.data;
 199         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 200         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 201         glEnableVertexAttribArray(0);
 202         glEnableVertexAttribArray(1);
 203
 204         glDrawElements(GL_TRIANGLES, n * 6,
 205                        GL_UNSIGNED_INT, c->base.indices.data);
 206
 207         glDisableVertexAttribArray(1);
 208         glDisableVertexAttribArray(0);
 209
 210         c->base.vertices.size = 0;
 211         c->base.indices.size = 0;
 212 }
 213
 214 static void
 215 create_border(struct wayland_compositor *c)
 216 {
 217         pixman_image_t *image;
 218
 219         image = load_image(DATADIR "/weston/border.png");
 220         if (!image) {
 221                 weston_log("could'nt load border image\n");
 222                 return;
 223         }
 224
 225         c->border.width = pixman_image_get_width(image);
 226         c->border.height = pixman_image_get_height(image);
 227
 228         glGenTextures(1, &c->border.texture);
 229         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 230         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 231         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 232         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 233         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 234
 235         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 236                      c->border.width,
 237                      c->border.height,
 238                      0, GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 239                      pixman_image_get_data(image));
 240
 241         pixman_image_unref(image);
 242 }
 243
 244 static int
 245 wayland_compositor_init_egl(struct wayland_compositor *c)
 246 {
 247         EGLint major, minor;
 248         EGLint n;
 249         EGLint config_attribs[] = {
 250                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 251                 EGL_RED_SIZE, 1,
 252                 EGL_GREEN_SIZE, 1,
 253                 EGL_BLUE_SIZE, 1,
 254                 EGL_ALPHA_SIZE, 1,
 255                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 256                 EGL_NONE
 257         };
 258
 259         c->base.egl_display = eglGetDisplay(c->parent.wl_display);
 260         if (c->base.egl_display == NULL) {
 261                 weston_log("failed to create display\n");
 262                 return -1;
 263         }
 264
 265         if (!eglInitialize(c->base.egl_display, &major, &minor)) {
 266                 weston_log("failed to initialize display\n");
 267                 return -1;
 268         }
 269
 270         if (!eglChooseConfig(c->base.egl_display, config_attribs,
 271                              &c->base.egl_config, 1, &n) || n == 0) {
 272                 weston_log("failed to choose config: %d\n", n);
 273                 return -1;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static void
 280 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 281 {
 282         struct weston_output *output = data;
 283
 284         wl_callback_destroy(callback);
 285         weston_output_finish_frame(output, time);
 286 }
 287
 288 static const struct wl_callback_listener frame_listener = {
 289         frame_done
 290 };
 291
 292 static void
 293 wayland_output_frame_notify(struct wl_listener *listener, void *data)
 294 {
 295         struct wayland_output *output =
 296                 container_of(listener,
 297                              struct wayland_output, frame_listener);
 298
 299         draw_border(output);
 300 }
 301
 302 static void
 303 wayland_output_repaint(struct weston_output *output_base,
 304                        pixman_region32_t *damage)
 305 {
 306         struct wayland_output *output = (struct wayland_output *) output_base;
 307         struct weston_compositor *ec = output->base.compositor;
 308         struct wl_callback *callback;
 309
 310         callback = wl_surface_frame(output->parent.surface);
 311         wl_callback_add_listener(callback, &frame_listener, output);
 312
 313         ec->renderer->repaint_output(&output->base, damage);
 314 }
 315
 316 static void
 317 wayland_output_destroy(struct weston_output *output_base)
 318 {
 319         struct wayland_output *output = (struct wayland_output *) output_base;
 320         struct weston_compositor *ec = output->base.compositor;
 321
 322         eglDestroySurface(ec->egl_display, output->base.egl_surface);
 323         wl_egl_window_destroy(output->parent.egl_window);
 324         free(output);
 325
 326         return;
 327 }
 328
 329 static const struct wl_shell_surface_listener shell_surface_listener;
 330
 331 static int
 332 wayland_compositor_create_output(struct wayland_compositor *c,
 333                                  int width, int height)
 334 {
 335         struct wayland_output *output;
 336
 337         output = malloc(sizeof *output);
 338         if (output == NULL)
 339                 return -1;
 340         memset(output, 0, sizeof *output);
 341
 342         output->mode.flags =
 343                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 344         output->mode.width = width;
 345         output->mode.height = height;
 346         output->mode.refresh = 60;
 347         wl_list_init(&output->base.mode_list);
 348         wl_list_insert(&output->base.mode_list, &output->mode.link);
 349
 350         output->base.current = &output->mode;
 351         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 352                                                 WL_OUTPUT_TRANSFORM_NORMAL);
 353
 354         output->base.border.top = c->border.top;
 355         output->base.border.bottom = c->border.bottom;
 356         output->base.border.left = c->border.left;
 357         output->base.border.right = c->border.right;
 358         output->base.make = "waywayland";
 359         output->base.model = "none";
 360
 361         weston_output_move(&output->base, 0, 0);
 362
 363         output->parent.surface =
 364                 wl_compositor_create_surface(c->parent.compositor);
 365         wl_surface_set_user_data(output->parent.surface, output);
 366
 367         output->parent.egl_window =
 368                 wl_egl_window_create(output->parent.surface,
 369                                      width + c->border.left + c->border.right,
 370                                      height + c->border.top + c->border.bottom);
 371         if (!output->parent.egl_window) {
 372                 weston_log("failure to create wl_egl_window\n");
 373                 goto cleanup_output;
 374         }
 375
 376         output->base.egl_surface =
 377                 eglCreateWindowSurface(c->base.egl_display, c->base.egl_config,
 378                                        output->parent.egl_window, NULL);
 379         if (!output->base.egl_surface) {
 380                 weston_log("failed to create window surface\n");
 381                 goto cleanup_window;
 382         }
 383
 384         output->parent.shell_surface =
 385                 wl_shell_get_shell_surface(c->parent.shell,
 386                                            output->parent.surface);
 387         wl_shell_surface_add_listener(output->parent.shell_surface,
 388                                       &shell_surface_listener, output);
 389         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 390
 391         output->base.origin = output->base.current;
 392         output->base.repaint = wayland_output_repaint;
 393         output->base.destroy = wayland_output_destroy;
 394         output->base.assign_planes = NULL;
 395         output->base.set_backlight = NULL;
 396         output->base.set_dpms = NULL;
 397         output->base.switch_mode = NULL;
 398
 399         wl_list_insert(c->base.output_list.prev, &output->base.link);
 400
 401         output->frame_listener.notify = wayland_output_frame_notify;
 402         wl_signal_add(&output->base.frame_signal, &output->frame_listener);
 403
 404         return 0;
 405
 406 cleanup_window:
 407         wl_egl_window_destroy(output->parent.egl_window);
 408 cleanup_output:
 409         /* FIXME: cleanup weston_output */
 410         free(output);
 411
 412         return -1;
 413 }
 414
 415 static void
 416 shell_surface_ping(void *data, struct wl_shell_surface *shell_surface,
 417                    uint32_t serial)
 418 {
 419         wl_shell_surface_pong(shell_surface, serial);
 420 }
 421
 422 static void
 423 shell_surface_configure(void *data, struct wl_shell_surface *shell_surface,
 424                         uint32_t edges, int32_t width, int32_t height)
 425 {
 426         /* FIXME: implement resizing */
 427 }
 428
 429 static void
 430 shell_surface_popup_done(void *data, struct wl_shell_surface *shell_surface)
 431 {
 432 }
 433
 434 static const struct wl_shell_surface_listener shell_surface_listener = {
 435         shell_surface_ping,
 436         shell_surface_configure,
 437         shell_surface_popup_done
 438 };
 439
 440 /* Events received from the wayland-server this compositor is client of: */
 441
 442 /* parent output interface */
 443 static void
 444 display_handle_geometry(void *data,
 445                         struct wl_output *wl_output,
 446                         int x,
 447                         int y,
 448                         int physical_width,
 449                         int physical_height,
 450                         int subpixel,
 451                         const char *make,
 452                         const char *model,
 453                         int transform)
 454 {
 455         struct wayland_compositor *c = data;
 456
 457         c->parent.screen_allocation.x = x;
 458         c->parent.screen_allocation.y = y;
 459 }
 460
 461 static void
 462 display_handle_mode(void *data,
 463                     struct wl_output *wl_output,
 464                     uint32_t flags,
 465                     int width,
 466                     int height,
 467                     int refresh)
 468 {
 469         struct wayland_compositor *c = data;
 470
 471         c->parent.screen_allocation.width = width;
 472         c->parent.screen_allocation.height = height;
 473 }
 474
 475 static const struct wl_output_listener output_listener = {
 476         display_handle_geometry,
 477         display_handle_mode
 478 };
 479
 480 static void
 481 check_focus(struct wayland_input *input, wl_fixed_t x, wl_fixed_t y)
 482 {
 483         struct wayland_compositor *c = input->compositor;
 484         int width, height, inside;
 485
 486         width = input->output->mode.width;
 487         height = input->output->mode.height;
 488
 489         inside = c->border.left <= wl_fixed_to_int(x) &&
 490                 wl_fixed_to_int(x) < width + c->border.left &&
 491                 c->border.top <= wl_fixed_to_int(y) &&
 492                 wl_fixed_to_int(y) < height + c->border.top;
 493
 494         if (!input->focus && inside) {
 495                 notify_pointer_focus(&input->base, &input->output->base,
 496                                      x - wl_fixed_from_int(c->border.left),
 497                                      y = wl_fixed_from_int(c->border.top));
 498                 wl_pointer_set_cursor(input->pointer,
 499                                       input->enter_serial, NULL, 0, 0);
 500         } else if (input->focus && !inside) {
 501                 notify_pointer_focus(&input->base, NULL, 0, 0);
 502                 /* FIXME: Should set default cursor here. */
 503         }
 504
 505         input->focus = inside;
 506 }
 507
 508 /* parent input interface */
 509 static void
 510 input_handle_pointer_enter(void *data, struct wl_pointer *pointer,
 511                            uint32_t serial, struct wl_surface *surface,
 512                            wl_fixed_t x, wl_fixed_t y)
 513 {
 514         struct wayland_input *input = data;
 515
 516         /* XXX: If we get a modifier event immediately before the focus,
 517          *      we should try to keep the same serial. */
 518         input->enter_serial = serial;
 519         input->output = wl_surface_get_user_data(surface);
 520         check_focus(input, x, y);
 521 }
 522
 523 static void
 524 input_handle_pointer_leave(void *data, struct wl_pointer *pointer,
 525                            uint32_t serial, struct wl_surface *surface)
 526 {
 527         struct wayland_input *input = data;
 528
 529         notify_pointer_focus(&input->base, NULL, 0, 0);
 530         input->output = NULL;
 531         input->focus = 0;
 532 }
 533
 534 static void
 535 input_handle_motion(void *data, struct wl_pointer *pointer,
 536                     uint32_t time, wl_fixed_t x, wl_fixed_t y)
 537 {
 538         struct wayland_input *input = data;
 539         struct wayland_compositor *c = input->compositor;
 540
 541         check_focus(input, x, y);
 542         if (input->focus)
 543                 notify_motion(&input->base, 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         enum wl_pointer_button_state state = state_w;
 555
 556         notify_button(&input->base, time, button, state);
 557 }
 558
 559 static void
 560 input_handle_axis(void *data, struct wl_pointer *pointer,
 561                   uint32_t time, uint32_t axis, wl_fixed_t value)
 562 {
 563         struct wayland_input *input = data;
 564
 565         notify_axis(&input->base, time, axis, value);
 566 }
 567
 568 static const struct wl_pointer_listener pointer_listener = {
 569         input_handle_pointer_enter,
 570         input_handle_pointer_leave,
 571         input_handle_motion,
 572         input_handle_button,
 573         input_handle_axis,
 574 };
 575
 576 static void
 577 input_handle_keymap(void *data, struct wl_keyboard *keyboard, uint32_t format,
 578                     int fd, uint32_t size)
 579 {
 580         struct wayland_input *input = data;
 581         struct xkb_keymap *keymap;
 582         char *map_str;
 583
 584         if (!data) {
 585                 close(fd);
 586                 return;
 587         }
 588
 589         if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
 590                 close(fd);
 591                 return;
 592         }
 593
 594         map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
 595         if (map_str == MAP_FAILED) {
 596                 close(fd);
 597                 return;
 598         }
 599
 600         keymap = xkb_map_new_from_string(input->compositor->base.xkb_context,
 601                                          map_str,
 602                                          XKB_KEYMAP_FORMAT_TEXT_V1,
 603                                          0);
 604         munmap(map_str, size);
 605         close(fd);
 606
 607         if (!keymap) {
 608                 weston_log("failed to compile keymap\n");
 609                 return;
 610         }
 611
 612         weston_seat_init_keyboard(&input->base, keymap);
 613         xkb_map_unref(keymap);
 614 }
 615
 616 static void
 617 input_handle_keyboard_enter(void *data,
 618                             struct wl_keyboard *keyboard,
 619                             uint32_t serial,
 620                             struct wl_surface *surface,
 621                             struct wl_array *keys)
 622 {
 623         struct wayland_input *input = data;
 624
 625         /* XXX: If we get a modifier event immediately before the focus,
 626          *      we should try to keep the same serial. */
 627         notify_keyboard_focus_in(&input->base, keys,
 628                                  STATE_UPDATE_AUTOMATIC);
 629 }
 630
 631 static void
 632 input_handle_keyboard_leave(void *data,
 633                             struct wl_keyboard *keyboard,
 634                             uint32_t serial,
 635                             struct wl_surface *surface)
 636 {
 637         struct wayland_input *input = data;
 638
 639         notify_keyboard_focus_out(&input->base);
 640 }
 641
 642 static void
 643 input_handle_key(void *data, struct wl_keyboard *keyboard,
 644                  uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
 645 {
 646         struct wayland_input *input = data;
 647
 648         input->key_serial = serial;
 649         notify_key(&input->base, time, key,
 650                    state ? WL_KEYBOARD_KEY_STATE_PRESSED :
 651                            WL_KEYBOARD_KEY_STATE_RELEASED,
 652                    STATE_UPDATE_NONE);
 653 }
 654
 655 static void
 656 input_handle_modifiers(void *data, struct wl_keyboard *keyboard,
 657                        uint32_t serial_in, uint32_t mods_depressed,
 658                        uint32_t mods_latched, uint32_t mods_locked,
 659                        uint32_t group)
 660 {
 661         struct wayland_input *input = data;
 662         struct wayland_compositor *c = input->compositor;
 663         uint32_t serial_out;
 664
 665         /* If we get a key event followed by a modifier event with the
 666          * same serial number, then we try to preserve those semantics by
 667          * reusing the same serial number on the way out too. */
 668         if (serial_in == input->key_serial)
 669                 serial_out = wl_display_get_serial(c->base.wl_display);
 670         else
 671                 serial_out = wl_display_next_serial(c->base.wl_display);
 672
 673         xkb_state_update_mask(input->base.xkb_state.state,
 674                               mods_depressed, mods_latched,
 675                               mods_locked, 0, 0, group);
 676         notify_modifiers(&input->base, serial_out);
 677 }
 678
 679 static const struct wl_keyboard_listener keyboard_listener = {
 680         input_handle_keymap,
 681         input_handle_keyboard_enter,
 682         input_handle_keyboard_leave,
 683         input_handle_key,
 684         input_handle_modifiers,
 685 };
 686
 687 static void
 688 input_handle_capabilities(void *data, struct wl_seat *seat,
 689                           enum wl_seat_capability caps)
 690 {
 691         struct wayland_input *input = data;
 692
 693         if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
 694                 input->pointer = wl_seat_get_pointer(seat);
 695                 wl_pointer_set_user_data(input->pointer, input);
 696                 wl_pointer_add_listener(input->pointer, &pointer_listener,
 697                                         input);
 698                 weston_seat_init_pointer(&input->base);
 699         } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
 700                 wl_pointer_destroy(input->pointer);
 701                 input->pointer = NULL;
 702         }
 703
 704         if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !input->keyboard) {
 705                 input->keyboard = wl_seat_get_keyboard(seat);
 706                 wl_keyboard_set_user_data(input->keyboard, input);
 707                 wl_keyboard_add_listener(input->keyboard, &keyboard_listener,
 708                                          input);
 709         } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && input->keyboard) {
 710                 wl_keyboard_destroy(input->keyboard);
 711                 input->keyboard = NULL;
 712         }
 713 }
 714
 715 static const struct wl_seat_listener seat_listener = {
 716         input_handle_capabilities,
 717 };
 718
 719 static void
 720 display_add_seat(struct wayland_compositor *c, uint32_t id)
 721 {
 722         struct wayland_input *input;
 723
 724         input = malloc(sizeof *input);
 725         if (input == NULL)
 726                 return;
 727
 728         memset(input, 0, sizeof *input);
 729
 730         weston_seat_init(&input->base, &c->base);
 731         input->compositor = c;
 732         input->seat = wl_registry_bind(c->parent.registry, id,
 733                                        &wl_seat_interface, 1);
 734         wl_list_insert(c->input_list.prev, &input->link);
 735
 736         wl_seat_add_listener(input->seat, &seat_listener, input);
 737         wl_seat_set_user_data(input->seat, input);
 738 }
 739
 740 static void
 741 registry_handle_global(void *data, struct wl_registry *registry, uint32_t name,
 742                        const char *interface, uint32_t version)
 743 {
 744         struct wayland_compositor *c = data;
 745
 746         if (strcmp(interface, "wl_compositor") == 0) {
 747                 c->parent.compositor =
 748                         wl_registry_bind(registry, name,
 749                                          &wl_compositor_interface, 1);
 750         } else if (strcmp(interface, "wl_output") == 0) {
 751                 c->parent.output =
 752                         wl_registry_bind(registry, name,
 753                                          &wl_output_interface, 1);
 754                 wl_output_add_listener(c->parent.output, &output_listener, c);
 755         } else if (strcmp(interface, "wl_shell") == 0) {
 756                 c->parent.shell =
 757                         wl_registry_bind(registry, name,
 758                                          &wl_shell_interface, 1);
 759         } else if (strcmp(interface, "wl_seat") == 0) {
 760                 display_add_seat(c, name);
 761         }
 762 }
 763
 764 static const struct wl_registry_listener registry_listener = {
 765         registry_handle_global
 766 };
 767
 768 static int
 769 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 770 {
 771         struct wayland_compositor *c = data;
 772         int count = 0;
 773
 774         if (mask & WL_EVENT_READABLE)
 775                 count = wl_display_dispatch(c->parent.wl_display);
 776         if (mask & WL_EVENT_WRITABLE)
 777                 wl_display_flush(c->parent.wl_display);
 778
 779         if (mask == 0) {
 780                 count = wl_display_dispatch_pending(c->parent.wl_display);
 781                 wl_display_flush(c->parent.wl_display);
 782         }
 783
 784         return count;
 785 }
 786
 787 static void
 788 wayland_restore(struct weston_compositor *ec)
 789 {
 790 }
 791
 792 static void
 793 wayland_destroy(struct weston_compositor *ec)
 794 {
 795         gles2_renderer_destroy(ec);
 796
 797         weston_compositor_shutdown(ec);
 798
 799         free(ec);
 800 }
 801
 802 static struct weston_compositor *
 803 wayland_compositor_create(struct wl_display *display,
 804                           int width, int height, const char *display_name,
 805                           int argc, char *argv[], const char *config_file)
 806 {
 807         struct wayland_compositor *c;
 808         struct wl_event_loop *loop;
 809         int fd;
 810
 811         c = malloc(sizeof *c);
 812         if (c == NULL)
 813                 return NULL;
 814
 815         memset(c, 0, sizeof *c);
 816
 817         if (weston_compositor_init(&c->base, display, argc, argv,
 818                                    config_file) < 0)
 819                 goto err_free;
 820
 821         c->parent.wl_display = wl_display_connect(display_name);
 822
 823         if (c->parent.wl_display == NULL) {
 824                 weston_log("failed to create display: %m\n");
 825                 goto err_compositor;
 826         }
 827
 828         wl_list_init(&c->input_list);
 829         c->parent.registry = wl_display_get_registry(c->parent.wl_display);
 830         wl_registry_add_listener(c->parent.registry, &registry_listener, c);
 831         wl_display_dispatch(c->parent.wl_display);
 832
 833         c->base.wl_display = display;
 834         if (wayland_compositor_init_egl(c) < 0)
 835                 goto err_display;
 836
 837         c->base.destroy = wayland_destroy;
 838         c->base.restore = wayland_restore;
 839
 840         c->border.top = 30;
 841         c->border.bottom = 24;
 842         c->border.left = 25;
 843         c->border.right = 26;
 844
 845         /* requires border fields */
 846         if (wayland_compositor_create_output(c, width, height) < 0)
 847                 goto err_display;
 848
 849         /* requires wayland_compositor_create_output */
 850         if (gles2_renderer_init(&c->base) < 0)
 851                 goto err_display;
 852
 853         /* requires gles2_renderer_init */
 854         create_border(c);
 855
 856         loop = wl_display_get_event_loop(c->base.wl_display);
 857
 858         fd = wl_display_get_fd(c->parent.wl_display);
 859         c->parent.wl_source =
 860                 wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
 861                                      wayland_compositor_handle_event, c);
 862         if (c->parent.wl_source == NULL)
 863                 goto err_display;
 864
 865         wl_event_source_check(c->parent.wl_source);
 866
 867         return &c->base;
 868
 869 err_display:
 870         wl_display_disconnect(c->parent.wl_display);
 871 err_compositor:
 872         weston_compositor_shutdown(&c->base);
 873 err_free:
 874         free(c);
 875         return NULL;
 876 }
 877
 878 WL_EXPORT struct weston_compositor *
 879 backend_init(struct wl_display *display, int argc, char *argv[],
 880              const char *config_file)
 881 {
 882         int width = 1024, height = 640;
 883         char *display_name = NULL;
 884
 885         const struct weston_option wayland_options[] = {
 886                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 887                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 888                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 889         };
 890
 891         parse_options(wayland_options,
 892                       ARRAY_LENGTH(wayland_options), argc, argv);
 893
 894         return wayland_compositor_create(display, width, height, display_name,
 895                                          argc, argv, config_file);
 896 }