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_compositor *compositor;
  52                 struct wl_shell *shell;
  53                 struct wl_output *output;
  54
  55                 struct {
  56                         int32_t x, y, width, height;
  57                 } screen_allocation;
  58
  59                 struct wl_event_source *wl_source;
  60                 uint32_t event_mask;
  61         } parent;
  62
  63         struct {
  64                 int32_t top, bottom, left, right;
  65                 GLuint texture;
  66                 int32_t width, height;
  67         } border;
  68
  69         struct wl_list input_list;
  70 };
  71
  72 struct wayland_output {
  73         struct weston_output    base;
  74         struct wl_listener      frame_listener;
  75         struct {
  76                 struct wl_surface       *surface;
  77                 struct wl_shell_surface *shell_surface;
  78                 struct wl_egl_window    *egl_window;
  79         } parent;
  80         struct weston_mode      mode;
  81 };
  82
  83 struct wayland_input {
  84         struct weston_seat base;
  85         struct wayland_compositor *compositor;
  86         struct wl_seat *seat;
  87         struct wl_pointer *pointer;
  88         struct wl_keyboard *keyboard;
  89         struct wl_touch *touch;
  90         struct wl_list link;
  91         uint32_t key_serial;
  92         uint32_t enter_serial;
  93         int focus;
  94         struct wayland_output *output;
  95 };
  96
  97
  98 static int
  99 texture_border(struct wayland_output *output)
 100 {
 101         struct wayland_compositor *c =
 102                 (struct wayland_compositor *) output->base.compositor;
 103         GLfloat *d;
 104         unsigned int *p;
 105         int i, j, k, n;
 106         GLfloat x[4], y[4], u[4], v[4];
 107
 108         x[0] = -c->border.left;
 109         x[1] = 0;
 110         x[2] = output->base.current->width;
 111         x[3] = output->base.current->width + c->border.right;
 112
 113         y[0] = -c->border.top;
 114         y[1] = 0;
 115         y[2] = output->base.current->height;
 116         y[3] = output->base.current->height + c->border.bottom;
 117
 118         u[0] = 0.0;
 119         u[1] = (GLfloat) c->border.left / c->border.width;
 120         u[2] = (GLfloat) (c->border.width - c->border.right) / c->border.width;
 121         u[3] = 1.0;
 122
 123         v[0] = 0.0;
 124         v[1] = (GLfloat) c->border.top / c->border.height;
 125         v[2] = (GLfloat) (c->border.height - c->border.bottom) / c->border.height;
 126         v[3] = 1.0;
 127
 128         n = 8;
 129         d = wl_array_add(&c->base.vertices, n * 16 * sizeof *d);
 130         p = wl_array_add(&c->base.indices, n * 6 * sizeof *p);
 131
 132         k = 0;
 133         for (i = 0; i < 3; i++)
 134                 for (j = 0; j < 3; j++) {
 135
 136                         if (i == 1 && j == 1)
 137                                 continue;
 138
 139                         d[ 0] = x[i];
 140                         d[ 1] = y[j];
 141                         d[ 2] = u[i];
 142                         d[ 3] = v[j];
 143
 144                         d[ 4] = x[i];
 145                         d[ 5] = y[j + 1];
 146                         d[ 6] = u[i];
 147                         d[ 7] = v[j + 1];
 148
 149                         d[ 8] = x[i + 1];
 150                         d[ 9] = y[j];
 151                         d[10] = u[i + 1];
 152                         d[11] = v[j];
 153
 154                         d[12] = x[i + 1];
 155                         d[13] = y[j + 1];
 156                         d[14] = u[i + 1];
 157                         d[15] = v[j + 1];
 158
 159                         p[0] = k + 0;
 160                         p[1] = k + 1;
 161                         p[2] = k + 2;
 162                         p[3] = k + 2;
 163                         p[4] = k + 1;
 164                         p[5] = k + 3;
 165
 166                         d += 16;
 167                         p += 6;
 168                         k += 4;
 169                 }
 170
 171         return k / 4;
 172 }
 173
 174 static void
 175 draw_border(struct wayland_output *output)
 176 {
 177         struct wayland_compositor *c =
 178                 (struct wayland_compositor *) output->base.compositor;
 179         struct weston_shader *shader = &c->base.texture_shader_rgba;
 180         GLfloat *v;
 181         int n;
 182
 183         glDisable(GL_BLEND);
 184         glUseProgram(shader->program);
 185         c->base.current_shader = shader;
 186
 187         glUniformMatrix4fv(shader->proj_uniform,
 188                            1, GL_FALSE, output->base.matrix.d);
 189
 190         glUniform1i(shader->tex_uniforms[0], 0);
 191         glUniform1f(shader->alpha_uniform, 1);
 192
 193         n = texture_border(output);
 194
 195         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 196
 197         v = c->base.vertices.data;
 198         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[0]);
 199         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof *v, &v[2]);
 200         glEnableVertexAttribArray(0);
 201         glEnableVertexAttribArray(1);
 202
 203         glDrawElements(GL_TRIANGLES, n * 6,
 204                        GL_UNSIGNED_INT, c->base.indices.data);
 205
 206         glDisableVertexAttribArray(1);
 207         glDisableVertexAttribArray(0);
 208
 209         c->base.vertices.size = 0;
 210         c->base.indices.size = 0;
 211 }
 212
 213 static void
 214 create_border(struct wayland_compositor *c)
 215 {
 216         pixman_image_t *image;
 217
 218         image = load_image(DATADIR "/weston/border.png");
 219         if (!image) {
 220                 weston_log("could'nt load border image\n");
 221                 return;
 222         }
 223
 224         c->border.width = pixman_image_get_width(image);
 225         c->border.height = pixman_image_get_height(image);
 226
 227         glGenTextures(1, &c->border.texture);
 228         glBindTexture(GL_TEXTURE_2D, c->border.texture);
 229         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 230         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 231         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 232         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 233
 234         glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT,
 235                      c->border.width,
 236                      c->border.height,
 237                      0, GL_BGRA_EXT, GL_UNSIGNED_BYTE,
 238                      pixman_image_get_data(image));
 239
 240         c->border.top = 25;
 241         c->border.bottom = 50;
 242         c->border.left = 25;
 243         c->border.right = 25;
 244
 245         pixman_image_unref(image);
 246 }
 247
 248 static int
 249 wayland_compositor_init_egl(struct wayland_compositor *c)
 250 {
 251         EGLint major, minor;
 252         EGLint n;
 253         EGLint config_attribs[] = {
 254                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 255                 EGL_RED_SIZE, 1,
 256                 EGL_GREEN_SIZE, 1,
 257                 EGL_BLUE_SIZE, 1,
 258                 EGL_ALPHA_SIZE, 1,
 259                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 260                 EGL_NONE
 261         };
 262
 263         c->base.egl_display = eglGetDisplay(c->parent.wl_display);
 264         if (c->base.egl_display == NULL) {
 265                 weston_log("failed to create display\n");
 266                 return -1;
 267         }
 268
 269         if (!eglInitialize(c->base.egl_display, &major, &minor)) {
 270                 weston_log("failed to initialize display\n");
 271                 return -1;
 272         }
 273
 274         if (!eglChooseConfig(c->base.egl_display, config_attribs,
 275                              &c->base.egl_config, 1, &n) || n == 0) {
 276                 weston_log("failed to choose config: %d\n", n);
 277                 return -1;
 278         }
 279
 280         return 0;
 281 }
 282
 283 static void
 284 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 285 {
 286         struct weston_output *output = data;
 287
 288         wl_callback_destroy(callback);
 289         weston_output_finish_frame(output, time);
 290 }
 291
 292 static const struct wl_callback_listener frame_listener = {
 293         frame_done
 294 };
 295
 296 static void
 297 wayland_output_frame_notify(struct wl_listener *listener, void *data)
 298 {
 299         struct wayland_output *output =
 300                 container_of(listener,
 301                              struct wayland_output, frame_listener);
 302
 303         draw_border(output);
 304 }
 305
 306 static void
 307 wayland_output_repaint(struct weston_output *output_base,
 308                        pixman_region32_t *damage)
 309 {
 310         struct wayland_output *output = (struct wayland_output *) output_base;
 311         struct weston_compositor *ec = output->base.compositor;
 312         struct wl_callback *callback;
 313
 314         ec->renderer->repaint_output(&output->base, damage);
 315
 316         callback = wl_surface_frame(output->parent.surface);
 317         wl_callback_add_listener(callback, &frame_listener, output);
 318
 319         return;
 320 }
 321
 322 static void
 323 wayland_output_destroy(struct weston_output *output_base)
 324 {
 325         struct wayland_output *output = (struct wayland_output *) output_base;
 326         struct weston_compositor *ec = output->base.compositor;
 327
 328         eglDestroySurface(ec->egl_display, output->base.egl_surface);
 329         wl_egl_window_destroy(output->parent.egl_window);
 330         free(output);
 331
 332         return;
 333 }
 334
 335 static const struct wl_shell_surface_listener shell_surface_listener;
 336
 337 static int
 338 wayland_compositor_create_output(struct wayland_compositor *c,
 339                                  int width, int height)
 340 {
 341         struct wayland_output *output;
 342
 343         output = malloc(sizeof *output);
 344         if (output == NULL)
 345                 return -1;
 346         memset(output, 0, sizeof *output);
 347
 348         output->mode.flags =
 349                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 350         output->mode.width = width;
 351         output->mode.height = height;
 352         output->mode.refresh = 60;
 353         wl_list_init(&output->base.mode_list);
 354         wl_list_insert(&output->base.mode_list, &output->mode.link);
 355
 356         output->base.current = &output->mode;
 357         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 358                                                 WL_OUTPUT_TRANSFORM_NORMAL);
 359
 360         output->base.border.top = c->border.top;
 361         output->base.border.bottom = c->border.bottom;
 362         output->base.border.left = c->border.left;
 363         output->base.border.right = c->border.right;
 364         output->base.make = "waywayland";
 365         output->base.model = "none";
 366
 367         weston_output_move(&output->base, 0, 0);
 368
 369         output->parent.surface =
 370                 wl_compositor_create_surface(c->parent.compositor);
 371         wl_surface_set_user_data(output->parent.surface, output);
 372
 373         output->parent.egl_window =
 374                 wl_egl_window_create(output->parent.surface,
 375                                      width + c->border.left + c->border.right,
 376                                      height + c->border.top + c->border.bottom);
 377         if (!output->parent.egl_window) {
 378                 weston_log("failure to create wl_egl_window\n");
 379                 goto cleanup_output;
 380         }
 381
 382         output->base.egl_surface =
 383                 eglCreateWindowSurface(c->base.egl_display, c->base.egl_config,
 384                                        output->parent.egl_window, NULL);
 385         if (!output->base.egl_surface) {
 386                 weston_log("failed to create window surface\n");
 387                 goto cleanup_window;
 388         }
 389
 390         output->parent.shell_surface =
 391                 wl_shell_get_shell_surface(c->parent.shell,
 392                                            output->parent.surface);
 393         wl_shell_surface_add_listener(output->parent.shell_surface,
 394                                       &shell_surface_listener, output);
 395         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 396
 397         output->base.origin = output->base.current;
 398         output->base.repaint = wayland_output_repaint;
 399         output->base.destroy = wayland_output_destroy;
 400         output->base.assign_planes = NULL;
 401         output->base.set_backlight = NULL;
 402         output->base.set_dpms = NULL;
 403         output->base.switch_mode = NULL;
 404
 405         wl_list_insert(c->base.output_list.prev, &output->base.link);
 406
 407         output->frame_listener.notify = wayland_output_frame_notify;
 408         wl_signal_add(&output->base.frame_signal, &output->frame_listener);
 409
 410         return 0;
 411
 412 cleanup_window:
 413         wl_egl_window_destroy(output->parent.egl_window);
 414 cleanup_output:
 415         /* FIXME: cleanup weston_output */
 416         free(output);
 417
 418         return -1;
 419 }
 420
 421 static void
 422 shell_surface_ping(void *data, struct wl_shell_surface *shell_surface,
 423                    uint32_t serial)
 424 {
 425         wl_shell_surface_pong(shell_surface, serial);
 426 }
 427
 428 static void
 429 shell_surface_configure(void *data, struct wl_shell_surface *shell_surface,
 430                         uint32_t edges, int32_t width, int32_t height)
 431 {
 432         /* FIXME: implement resizing */
 433 }
 434
 435 static void
 436 shell_surface_popup_done(void *data, struct wl_shell_surface *shell_surface)
 437 {
 438 }
 439
 440 static const struct wl_shell_surface_listener shell_surface_listener = {
 441         shell_surface_ping,
 442         shell_surface_configure,
 443         shell_surface_popup_done
 444 };
 445
 446 /* Events received from the wayland-server this compositor is client of: */
 447
 448 /* parent output interface */
 449 static void
 450 display_handle_geometry(void *data,
 451                         struct wl_output *wl_output,
 452                         int x,
 453                         int y,
 454                         int physical_width,
 455                         int physical_height,
 456                         int subpixel,
 457                         const char *make,
 458                         const char *model,
 459                         int transform)
 460 {
 461         struct wayland_compositor *c = data;
 462
 463         c->parent.screen_allocation.x = x;
 464         c->parent.screen_allocation.y = y;
 465 }
 466
 467 static void
 468 display_handle_mode(void *data,
 469                     struct wl_output *wl_output,
 470                     uint32_t flags,
 471                     int width,
 472                     int height,
 473                     int refresh)
 474 {
 475         struct wayland_compositor *c = data;
 476
 477         c->parent.screen_allocation.width = width;
 478         c->parent.screen_allocation.height = height;
 479 }
 480
 481 static const struct wl_output_listener output_listener = {
 482         display_handle_geometry,
 483         display_handle_mode
 484 };
 485
 486 static void
 487 check_focus(struct wayland_input *input, wl_fixed_t x, wl_fixed_t y)
 488 {
 489         struct wayland_compositor *c = input->compositor;
 490         int width, height, inside;
 491
 492         width = input->output->mode.width;
 493         height = input->output->mode.height;
 494
 495         inside = c->border.left <= wl_fixed_to_int(x) &&
 496                 wl_fixed_to_int(x) < width + c->border.left &&
 497                 c->border.top <= wl_fixed_to_int(y) &&
 498                 wl_fixed_to_int(y) < height + c->border.top;
 499
 500         if (!input->focus && inside) {
 501                 notify_pointer_focus(&input->base, &input->output->base,
 502                                      x - wl_fixed_from_int(c->border.left),
 503                                      y = wl_fixed_from_int(c->border.top));
 504                 wl_pointer_set_cursor(input->pointer,
 505                                       input->enter_serial, NULL, 0, 0);
 506         } else if (input->focus && !inside) {
 507                 notify_pointer_focus(&input->base, NULL, 0, 0);
 508                 /* FIXME: Should set default cursor here. */
 509         }
 510
 511         input->focus = inside;
 512 }
 513
 514 /* parent input interface */
 515 static void
 516 input_handle_pointer_enter(void *data, struct wl_pointer *pointer,
 517                            uint32_t serial, struct wl_surface *surface,
 518                            wl_fixed_t x, wl_fixed_t y)
 519 {
 520         struct wayland_input *input = data;
 521
 522         /* XXX: If we get a modifier event immediately before the focus,
 523          *      we should try to keep the same serial. */
 524         input->enter_serial = serial;
 525         input->output = wl_surface_get_user_data(surface);
 526         check_focus(input, x, y);
 527 }
 528
 529 static void
 530 input_handle_pointer_leave(void *data, struct wl_pointer *pointer,
 531                            uint32_t serial, struct wl_surface *surface)
 532 {
 533         struct wayland_input *input = data;
 534
 535         notify_pointer_focus(&input->base, NULL, 0, 0);
 536         input->output = NULL;
 537         input->focus = 0;
 538 }
 539
 540 static void
 541 input_handle_motion(void *data, struct wl_pointer *pointer,
 542                     uint32_t time, wl_fixed_t x, wl_fixed_t y)
 543 {
 544         struct wayland_input *input = data;
 545         struct wayland_compositor *c = input->compositor;
 546
 547         check_focus(input, x, y);
 548         if (input->focus)
 549                 notify_motion(&input->base, time,
 550                               x - wl_fixed_from_int(c->border.left),
 551                               y - wl_fixed_from_int(c->border.top));
 552 }
 553
 554 static void
 555 input_handle_button(void *data, struct wl_pointer *pointer,
 556                     uint32_t serial, uint32_t time, uint32_t button,
 557                     uint32_t state_w)
 558 {
 559         struct wayland_input *input = data;
 560         enum wl_pointer_button_state state = state_w;
 561
 562         notify_button(&input->base, time, button, state);
 563 }
 564
 565 static void
 566 input_handle_axis(void *data, struct wl_pointer *pointer,
 567                   uint32_t time, uint32_t axis, wl_fixed_t value)
 568 {
 569         struct wayland_input *input = data;
 570
 571         notify_axis(&input->base, time, axis, value);
 572 }
 573
 574 static const struct wl_pointer_listener pointer_listener = {
 575         input_handle_pointer_enter,
 576         input_handle_pointer_leave,
 577         input_handle_motion,
 578         input_handle_button,
 579         input_handle_axis,
 580 };
 581
 582 static void
 583 input_handle_keymap(void *data, struct wl_keyboard *keyboard, uint32_t format,
 584                     int fd, uint32_t size)
 585 {
 586         struct wayland_input *input = data;
 587         struct xkb_keymap *keymap;
 588         char *map_str;
 589
 590         if (!data) {
 591                 close(fd);
 592                 return;
 593         }
 594
 595         if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
 596                 close(fd);
 597                 return;
 598         }
 599
 600         map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
 601         if (map_str == MAP_FAILED) {
 602                 close(fd);
 603                 return;
 604         }
 605
 606         keymap = xkb_map_new_from_string(input->compositor->base.xkb_context,
 607                                          map_str,
 608                                          XKB_KEYMAP_FORMAT_TEXT_V1,
 609                                          0);
 610         munmap(map_str, size);
 611         close(fd);
 612
 613         if (!keymap) {
 614                 weston_log("failed to compile keymap\n");
 615                 return;
 616         }
 617
 618         weston_seat_init_keyboard(&input->base, keymap);
 619         xkb_map_unref(keymap);
 620 }
 621
 622 static void
 623 input_handle_keyboard_enter(void *data,
 624                             struct wl_keyboard *keyboard,
 625                             uint32_t serial,
 626                             struct wl_surface *surface,
 627                             struct wl_array *keys)
 628 {
 629         struct wayland_input *input = data;
 630
 631         /* XXX: If we get a modifier event immediately before the focus,
 632          *      we should try to keep the same serial. */
 633         notify_keyboard_focus_in(&input->base, keys,
 634                                  STATE_UPDATE_AUTOMATIC);
 635 }
 636
 637 static void
 638 input_handle_keyboard_leave(void *data,
 639                             struct wl_keyboard *keyboard,
 640                             uint32_t serial,
 641                             struct wl_surface *surface)
 642 {
 643         struct wayland_input *input = data;
 644
 645         notify_keyboard_focus_out(&input->base);
 646 }
 647
 648 static void
 649 input_handle_key(void *data, struct wl_keyboard *keyboard,
 650                  uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
 651 {
 652         struct wayland_input *input = data;
 653
 654         input->key_serial = serial;
 655         notify_key(&input->base, time, key,
 656                    state ? WL_KEYBOARD_KEY_STATE_PRESSED :
 657                            WL_KEYBOARD_KEY_STATE_RELEASED,
 658                    STATE_UPDATE_NONE);
 659 }
 660
 661 static void
 662 input_handle_modifiers(void *data, struct wl_keyboard *keyboard,
 663                        uint32_t serial_in, uint32_t mods_depressed,
 664                        uint32_t mods_latched, uint32_t mods_locked,
 665                        uint32_t group)
 666 {
 667         struct wayland_input *input = data;
 668         struct wayland_compositor *c = input->compositor;
 669         uint32_t serial_out;
 670
 671         /* If we get a key event followed by a modifier event with the
 672          * same serial number, then we try to preserve those semantics by
 673          * reusing the same serial number on the way out too. */
 674         if (serial_in == input->key_serial)
 675                 serial_out = wl_display_get_serial(c->base.wl_display);
 676         else
 677                 serial_out = wl_display_next_serial(c->base.wl_display);
 678
 679         xkb_state_update_mask(input->base.xkb_state.state,
 680                               mods_depressed, mods_latched,
 681                               mods_locked, 0, 0, group);
 682         notify_modifiers(&input->base, serial_out);
 683 }
 684
 685 static const struct wl_keyboard_listener keyboard_listener = {
 686         input_handle_keymap,
 687         input_handle_keyboard_enter,
 688         input_handle_keyboard_leave,
 689         input_handle_key,
 690         input_handle_modifiers,
 691 };
 692
 693 static void
 694 input_handle_capabilities(void *data, struct wl_seat *seat,
 695                           enum wl_seat_capability caps)
 696 {
 697         struct wayland_input *input = data;
 698
 699         if ((caps & WL_SEAT_CAPABILITY_POINTER) && !input->pointer) {
 700                 input->pointer = wl_seat_get_pointer(seat);
 701                 wl_pointer_set_user_data(input->pointer, input);
 702                 wl_pointer_add_listener(input->pointer, &pointer_listener,
 703                                         input);
 704                 weston_seat_init_pointer(&input->base);
 705         } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && input->pointer) {
 706                 wl_pointer_destroy(input->pointer);
 707                 input->pointer = NULL;
 708         }
 709
 710         if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !input->keyboard) {
 711                 input->keyboard = wl_seat_get_keyboard(seat);
 712                 wl_keyboard_set_user_data(input->keyboard, input);
 713                 wl_keyboard_add_listener(input->keyboard, &keyboard_listener,
 714                                          input);
 715         } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && input->keyboard) {
 716                 wl_keyboard_destroy(input->keyboard);
 717                 input->keyboard = NULL;
 718         }
 719 }
 720
 721 static const struct wl_seat_listener seat_listener = {
 722         input_handle_capabilities,
 723 };
 724
 725 static void
 726 display_add_seat(struct wayland_compositor *c, uint32_t id)
 727 {
 728         struct wayland_input *input;
 729
 730         input = malloc(sizeof *input);
 731         if (input == NULL)
 732                 return;
 733
 734         memset(input, 0, sizeof *input);
 735
 736         weston_seat_init(&input->base, &c->base);
 737         input->compositor = c;
 738         input->seat = wl_display_bind(c->parent.wl_display, id,
 739                                       &wl_seat_interface);
 740         wl_list_insert(c->input_list.prev, &input->link);
 741
 742         wl_seat_add_listener(input->seat, &seat_listener, input);
 743         wl_seat_set_user_data(input->seat, input);
 744 }
 745
 746 static void
 747 display_handle_global(struct wl_display *display, uint32_t id,
 748                       const char *interface, uint32_t version, void *data)
 749 {
 750         struct wayland_compositor *c = data;
 751
 752         if (strcmp(interface, "wl_compositor") == 0) {
 753                 c->parent.compositor =
 754                         wl_display_bind(display, id, &wl_compositor_interface);
 755         } else if (strcmp(interface, "wl_output") == 0) {
 756                 c->parent.output =
 757                         wl_display_bind(display, id, &wl_output_interface);
 758                 wl_output_add_listener(c->parent.output, &output_listener, c);
 759         } else if (strcmp(interface, "wl_shell") == 0) {
 760                 c->parent.shell =
 761                         wl_display_bind(display, id, &wl_shell_interface);
 762         } else if (strcmp(interface, "wl_seat") == 0) {
 763                 display_add_seat(c, id);
 764         }
 765 }
 766
 767 static int
 768 update_event_mask(uint32_t mask, void *data)
 769 {
 770         struct wayland_compositor *c = data;
 771
 772         c->parent.event_mask = mask;
 773         if (c->parent.wl_source)
 774                 wl_event_source_fd_update(c->parent.wl_source, mask);
 775
 776         return 0;
 777 }
 778
 779 static int
 780 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 781 {
 782         struct wayland_compositor *c = data;
 783
 784         if (mask & WL_EVENT_READABLE)
 785                 wl_display_iterate(c->parent.wl_display, WL_DISPLAY_READABLE);
 786         if (mask & WL_EVENT_WRITABLE)
 787                 wl_display_iterate(c->parent.wl_display, WL_DISPLAY_WRITABLE);
 788
 789         return 1;
 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         wl_display_add_global_listener(c->parent.wl_display,
 835                                 display_handle_global, c);
 836
 837         wl_display_iterate(c->parent.wl_display, WL_DISPLAY_READABLE);
 838
 839         c->base.wl_display = display;
 840         if (wayland_compositor_init_egl(c) < 0)
 841                 goto err_display;
 842
 843         c->base.destroy = wayland_destroy;
 844         c->base.restore = wayland_restore;
 845
 846         create_border(c);
 847         if (wayland_compositor_create_output(c, width, height) < 0)
 848                 goto err_display;
 849
 850         if (gles2_renderer_init(&c->base) < 0)
 851                 goto err_display;
 852
 853         loop = wl_display_get_event_loop(c->base.wl_display);
 854
 855         fd = wl_display_get_fd(c->parent.wl_display, update_event_mask, c);
 856         c->parent.wl_source =
 857                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 858                                      wayland_compositor_handle_event, c);
 859         if (c->parent.wl_source == NULL)
 860                 goto err_display;
 861
 862         return &c->base;
 863
 864 err_display:
 865         wl_display_disconnect(c->parent.wl_display);
 866 err_compositor:
 867         weston_compositor_shutdown(&c->base);
 868 err_free:
 869         free(c);
 870         return NULL;
 871 }
 872
 873 WL_EXPORT struct weston_compositor *
 874 backend_init(struct wl_display *display, int argc, char *argv[],
 875              const char *config_file)
 876 {
 877         int width = 1024, height = 640;
 878         char *display_name = NULL;
 879
 880         const struct weston_option wayland_options[] = {
 881                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 882                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 883                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 884         };
 885
 886         parse_options(wayland_options,
 887                       ARRAY_LENGTH(wayland_options), argc, argv);
 888
 889         return wayland_compositor_create(display, width, height, display_name,
 890                                          argc, argv, config_file);
 891 }