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 "log.h"
  46
  47 struct wayland_compositor {
  48         struct weston_compositor         base;
  49
  50         struct wl_egl_pixmap            *dummy_pixmap;
  51         EGLSurface                       dummy_egl_surface;
  52
  53         struct {
  54                 struct wl_display *wl_display;
  55                 struct wl_compositor *compositor;
  56                 struct wl_shell *shell;
  57                 struct wl_output *output;
  58
  59                 struct {
  60                         int32_t x, y, width, height;
  61                 } screen_allocation;
  62
  63                 struct wl_event_source *wl_source;
  64                 uint32_t event_mask;
  65         } parent;
  66
  67         struct {
  68                 int32_t top, bottom, left, right;
  69                 GLuint texture;
  70                 int32_t width, height;
  71         } border;
  72
  73         struct wl_list input_list;
  74 };
  75
  76 struct wayland_output {
  77         struct weston_output    base;
  78
  79         struct {
  80                 struct wl_surface       *surface;
  81                 struct wl_shell_surface *shell_surface;
  82                 struct wl_egl_window    *egl_window;
  83         } parent;
  84         EGLSurface egl_surface;
  85         struct weston_mode      mode;
  86 };
  87
  88 struct wayland_input {
  89         struct wayland_compositor *compositor;
  90         struct wl_seat *seat;
  91         struct wl_pointer *pointer;
  92         struct wl_keyboard *keyboard;
  93         struct wl_touch *touch;
  94         struct wl_list link;
  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;
 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_uniform, 0);
 191         glUniform1f(shader->alpha_uniform, 1);
 192         glUniform1f(shader->texwidth_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         c->border.top = 25;
 242         c->border.bottom = 50;
 243         c->border.left = 25;
 244         c->border.right = 25;
 245
 246         pixman_image_unref(image);
 247 }
 248
 249 static int
 250 wayland_compositor_init_egl(struct wayland_compositor *c)
 251 {
 252         EGLint major, minor;
 253         EGLint n;
 254         EGLint config_attribs[] = {
 255                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 256                 EGL_RED_SIZE, 1,
 257                 EGL_GREEN_SIZE, 1,
 258                 EGL_BLUE_SIZE, 1,
 259                 EGL_ALPHA_SIZE, 1,
 260                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 261                 EGL_NONE
 262         };
 263         static const EGLint context_attribs[] = {
 264                 EGL_CONTEXT_CLIENT_VERSION, 2,
 265                 EGL_NONE
 266         };
 267
 268         c->base.egl_display = eglGetDisplay(c->parent.wl_display);
 269         if (c->base.egl_display == NULL) {
 270                 weston_log("failed to create display\n");
 271                 return -1;
 272         }
 273
 274         if (!eglInitialize(c->base.egl_display, &major, &minor)) {
 275                 weston_log("failed to initialize display\n");
 276                 return -1;
 277         }
 278
 279         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 280                 weston_log("failed to bind EGL_OPENGL_ES_API\n");
 281                 return -1;
 282         }
 283         if (!eglChooseConfig(c->base.egl_display, config_attribs,
 284                              &c->base.egl_config, 1, &n) || n == 0) {
 285                 weston_log("failed to choose config: %d\n", n);
 286                 return -1;
 287         }
 288
 289         c->base.egl_context =
 290                 eglCreateContext(c->base.egl_display, c->base.egl_config,
 291                                  EGL_NO_CONTEXT, context_attribs);
 292         if (c->base.egl_context == NULL) {
 293                 weston_log("failed to create context\n");
 294                 return -1;
 295         }
 296
 297         c->dummy_pixmap = wl_egl_pixmap_create(10, 10, 0);
 298         if (!c->dummy_pixmap) {
 299                 weston_log("failure to create dummy_pixmap\n");
 300                 return -1;
 301         }
 302
 303         c->dummy_egl_surface =
 304                 eglCreatePixmapSurface(c->base.egl_display, c->base.egl_config,
 305                                        c->dummy_pixmap, NULL);
 306         if (!eglMakeCurrent(c->base.egl_display, c->dummy_egl_surface,
 307                             c->dummy_egl_surface, c->base.egl_context)) {
 308                 weston_log("failed to make context current\n");
 309                 return -1;
 310         }
 311
 312         return 0;
 313 }
 314
 315 static void
 316 frame_done(void *data, struct wl_callback *callback, uint32_t time)
 317 {
 318         struct weston_output *output = data;
 319
 320         wl_callback_destroy(callback);
 321         weston_output_finish_frame(output, time);
 322 }
 323
 324 static const struct wl_callback_listener frame_listener = {
 325         frame_done
 326 };
 327
 328 static void
 329 wayland_output_repaint(struct weston_output *output_base,
 330                        pixman_region32_t *damage)
 331 {
 332         struct wayland_output *output = (struct wayland_output *) output_base;
 333         struct wayland_compositor *compositor =
 334                 (struct wayland_compositor *) output->base.compositor;
 335         struct wl_callback *callback;
 336         struct weston_surface *surface;
 337
 338         if (!eglMakeCurrent(compositor->base.egl_display, output->egl_surface,
 339                             output->egl_surface,
 340                             compositor->base.egl_context)) {
 341                 weston_log("failed to make current\n");
 342                 return;
 343         }
 344
 345         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 346                 weston_surface_draw(surface, &output->base, damage);
 347
 348         draw_border(output);
 349
 350         wl_signal_emit(&output->base.frame_signal, output);
 351
 352         eglSwapBuffers(compositor->base.egl_display, output->egl_surface);
 353         callback = wl_surface_frame(output->parent.surface);
 354         wl_callback_add_listener(callback, &frame_listener, output);
 355
 356         return;
 357 }
 358
 359 static void
 360 wayland_output_destroy(struct weston_output *output_base)
 361 {
 362         struct wayland_output *output = (struct wayland_output *) output_base;
 363         struct weston_compositor *ec = output->base.compositor;
 364
 365         eglDestroySurface(ec->egl_display, output->egl_surface);
 366         wl_egl_window_destroy(output->parent.egl_window);
 367         free(output);
 368
 369         return;
 370 }
 371
 372 static const struct wl_shell_surface_listener shell_surface_listener;
 373
 374 static int
 375 wayland_compositor_create_output(struct wayland_compositor *c,
 376                                  int width, int height)
 377 {
 378         struct wayland_output *output;
 379
 380         output = malloc(sizeof *output);
 381         if (output == NULL)
 382                 return -1;
 383         memset(output, 0, sizeof *output);
 384
 385         output->mode.flags =
 386                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 387         output->mode.width = width;
 388         output->mode.height = height;
 389         output->mode.refresh = 60;
 390         wl_list_init(&output->base.mode_list);
 391         wl_list_insert(&output->base.mode_list, &output->mode.link);
 392
 393         output->base.current = &output->mode;
 394         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 395                          WL_OUTPUT_FLIPPED);
 396
 397         output->base.border.top = c->border.top;
 398         output->base.border.bottom = c->border.bottom;
 399         output->base.border.left = c->border.left;
 400         output->base.border.right = c->border.right;
 401
 402         weston_output_move(&output->base, 0, 0);
 403
 404         output->parent.surface =
 405                 wl_compositor_create_surface(c->parent.compositor);
 406         wl_surface_set_user_data(output->parent.surface, output);
 407
 408         output->parent.egl_window =
 409                 wl_egl_window_create(output->parent.surface,
 410                                      width + c->border.left + c->border.right,
 411                                      height + c->border.top + c->border.bottom);
 412         if (!output->parent.egl_window) {
 413                 weston_log("failure to create wl_egl_window\n");
 414                 goto cleanup_output;
 415         }
 416
 417         output->egl_surface =
 418                 eglCreateWindowSurface(c->base.egl_display, c->base.egl_config,
 419                                        output->parent.egl_window, NULL);
 420         if (!output->egl_surface) {
 421                 weston_log("failed to create window surface\n");
 422                 goto cleanup_window;
 423         }
 424
 425         if (!eglMakeCurrent(c->base.egl_display, output->egl_surface,
 426                             output->egl_surface, c->base.egl_context)) {
 427                 weston_log("failed to make surface current\n");
 428                 goto cleanup_surface;
 429                 return -1;
 430         }
 431
 432         output->parent.shell_surface =
 433                 wl_shell_get_shell_surface(c->parent.shell,
 434                                            output->parent.surface);
 435         wl_shell_surface_add_listener(output->parent.shell_surface,
 436                                       &shell_surface_listener, output);
 437         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 438
 439         output->base.origin = output->base.current;
 440         output->base.repaint = wayland_output_repaint;
 441         output->base.destroy = wayland_output_destroy;
 442         output->base.assign_planes = NULL;
 443         output->base.set_backlight = NULL;
 444         output->base.set_dpms = NULL;
 445         output->base.switch_mode = NULL;
 446
 447         wl_list_insert(c->base.output_list.prev, &output->base.link);
 448
 449         return 0;
 450
 451 cleanup_surface:
 452         eglDestroySurface(c->base.egl_display, output->egl_surface);
 453 cleanup_window:
 454         wl_egl_window_destroy(output->parent.egl_window);
 455 cleanup_output:
 456         /* FIXME: cleanup weston_output */
 457         free(output);
 458
 459         return -1;
 460 }
 461
 462 static void
 463 shell_surface_ping(void *data, struct wl_shell_surface *shell_surface,
 464                    uint32_t serial)
 465 {
 466         wl_shell_surface_pong(shell_surface, serial);
 467 }
 468
 469 static void
 470 shell_surface_configure(void *data, struct wl_shell_surface *shell_surface,
 471                         uint32_t edges, int32_t width, int32_t height)
 472 {
 473         /* FIXME: implement resizing */
 474 }
 475
 476 static void
 477 shell_surface_popup_done(void *data, struct wl_shell_surface *shell_surface)
 478 {
 479 }
 480
 481 static const struct wl_shell_surface_listener shell_surface_listener = {
 482         shell_surface_ping,
 483         shell_surface_configure,
 484         shell_surface_popup_done
 485 };
 486
 487 /* Events received from the wayland-server this compositor is client of: */
 488
 489 /* parent output interface */
 490 static void
 491 display_handle_geometry(void *data,
 492                         struct wl_output *wl_output,
 493                         int x,
 494                         int y,
 495                         int physical_width,
 496                         int physical_height,
 497                         int subpixel,
 498                         const char *make,
 499                         const char *model)
 500 {
 501         struct wayland_compositor *c = data;
 502
 503         c->parent.screen_allocation.x = x;
 504         c->parent.screen_allocation.y = y;
 505 }
 506
 507 static void
 508 display_handle_mode(void *data,
 509                     struct wl_output *wl_output,
 510                     uint32_t flags,
 511                     int width,
 512                     int height,
 513                     int refresh)
 514 {
 515         struct wayland_compositor *c = data;
 516
 517         c->parent.screen_allocation.width = width;
 518         c->parent.screen_allocation.height = height;
 519 }
 520
 521 static const struct wl_output_listener output_listener = {
 522         display_handle_geometry,
 523         display_handle_mode
 524 };
 525
 526 /* parent input interface */
 527 static void
 528 input_handle_pointer_enter(void *data, struct wl_pointer *pointer,
 529                            uint32_t serial, struct wl_surface *surface,
 530                            wl_fixed_t x, wl_fixed_t y)
 531 {
 532         struct wayland_input *input = data;
 533         struct wayland_output *output;
 534         struct wayland_compositor *c = input->compositor;
 535
 536         output = wl_surface_get_user_data(surface);
 537         notify_pointer_focus(&c->base.seat->seat, &output->base, x, y);
 538         wl_pointer_set_cursor(input->pointer, serial, NULL, 0, 0);
 539 }
 540
 541 static void
 542 input_handle_pointer_leave(void *data, struct wl_pointer *pointer,
 543                            uint32_t serial, struct wl_surface *surface)
 544 {
 545         struct wayland_input *input = data;
 546         struct wayland_compositor *c = input->compositor;
 547
 548         notify_pointer_focus(&c->base.seat->seat, NULL, 0, 0);
 549 }
 550
 551 static void
 552 input_handle_motion(void *data, struct wl_pointer *pointer,
 553                     uint32_t time, wl_fixed_t x, wl_fixed_t y)
 554 {
 555         struct wayland_input *input = data;
 556         struct wayland_compositor *c = input->compositor;
 557
 558         notify_motion(&c->base.seat->seat, time,
 559                       x - wl_fixed_from_int(c->border.left),
 560                       y - wl_fixed_from_int(c->border.top));
 561 }
 562
 563 static void
 564 input_handle_button(void *data, struct wl_pointer *pointer,
 565                     uint32_t serial, uint32_t time, uint32_t button,
 566                     uint32_t state_w)
 567 {
 568         struct wayland_input *input = data;
 569         struct wayland_compositor *c = input->compositor;
 570         enum wl_pointer_button_state state = state_w;
 571
 572         notify_button(&c->base.seat->seat, time, button, state);
 573 }
 574
 575 static void
 576 input_handle_axis(void *data, struct wl_pointer *pointer,
 577                   uint32_t time, uint32_t axis, wl_fixed_t value)
 578 {
 579         struct wayland_input *input = data;
 580         struct wayland_compositor *c = input->compositor;
 581
 582         notify_axis(&c->base.seat->seat, time, axis, value);
 583 }
 584
 585 static const struct wl_pointer_listener pointer_listener = {
 586         input_handle_pointer_enter,
 587         input_handle_pointer_leave,
 588         input_handle_motion,
 589         input_handle_button,
 590         input_handle_axis,
 591 };
 592
 593 static void
 594 input_handle_keymap(void *data, struct wl_keyboard *keyboard, uint32_t format,
 595                     int fd, uint32_t size)
 596 {
 597         struct wayland_input *input = data;
 598         struct xkb_keymap *keymap;
 599         char *map_str;
 600
 601         if (!data) {
 602                 close(fd);
 603                 return;
 604         }
 605
 606         if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
 607                 close(fd);
 608                 return;
 609         }
 610
 611         map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
 612         if (map_str == MAP_FAILED) {
 613                 close(fd);
 614                 return;
 615         }
 616
 617         keymap = xkb_map_new_from_string(input->compositor->base.xkb_context,
 618                                          map_str,
 619                                          XKB_KEYMAP_FORMAT_TEXT_V1,
 620                                          0);
 621         munmap(map_str, size);
 622         close(fd);
 623
 624         if (!keymap) {
 625                 weston_log("failed to compile keymap\n");
 626                 return;
 627         }
 628
 629         weston_seat_init_keyboard(input->compositor->base.seat, keymap);
 630         xkb_map_unref(keymap);
 631 }
 632
 633 static void
 634 input_handle_keyboard_enter(void *data,
 635                             struct wl_keyboard *keyboard,
 636                             uint32_t serial,
 637                             struct wl_surface *surface,
 638                             struct wl_array *keys)
 639 {
 640         struct wayland_input *input = data;
 641         struct wayland_compositor *c = input->compositor;
 642
 643         notify_keyboard_focus(&c->base.seat->seat, keys);
 644 }
 645
 646 static void
 647 input_handle_keyboard_leave(void *data,
 648                             struct wl_keyboard *keyboard,
 649                             uint32_t serial,
 650                             struct wl_surface *surface)
 651 {
 652         struct wayland_input *input = data;
 653         struct wayland_compositor *c = input->compositor;
 654
 655         notify_keyboard_focus(&c->base.seat->seat, NULL);
 656 }
 657
 658 static void
 659 input_handle_key(void *data, struct wl_keyboard *keyboard,
 660                  uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
 661 {
 662         struct wayland_input *input = data;
 663         struct wayland_compositor *c = input->compositor;
 664
 665         notify_key(&c->base.seat->seat, time, key,
 666                    state ? WL_KEYBOARD_KEY_STATE_PRESSED :
 667                            WL_KEYBOARD_KEY_STATE_RELEASED);
 668 }
 669
 670 static void
 671 input_handle_modifiers(void *data, struct wl_keyboard *keyboard,
 672                        uint32_t serial, uint32_t mods_depressed,
 673                        uint32_t mods_latched, uint32_t mods_locked,
 674                        uint32_t group)
 675 {
 676         /* XXX notify_modifiers(); */
 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->compositor->base.seat);
 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         input->compositor = c;
 731         input->seat = wl_display_bind(c->parent.wl_display, id,
 732                                       &wl_seat_interface);
 733         wl_list_insert(c->input_list.prev, &input->link);
 734
 735         wl_seat_add_listener(input->seat, &seat_listener, input);
 736         wl_seat_set_user_data(input->seat, input);
 737 }
 738
 739 /* We can't start adding input devices until weston_compositor_init, but
 740  * also can't call weston_compositor_init until we've handled some of the
 741  * base display code first.  So, we have a separate global handler for
 742  * seats. */
 743 static void
 744 display_handle_global_input(struct wl_display *display, uint32_t id,
 745                             const char *interface, uint32_t version,
 746                             void *data)
 747 {
 748         struct wayland_compositor *c = data;
 749
 750         if (strcmp(interface, "wl_seat") == 0)
 751                 display_add_seat(c, id);
 752 }
 753
 754
 755 static void
 756 display_handle_global(struct wl_display *display, uint32_t id,
 757                       const char *interface, uint32_t version, void *data)
 758 {
 759         struct wayland_compositor *c = data;
 760
 761         if (strcmp(interface, "wl_compositor") == 0) {
 762                 c->parent.compositor =
 763                         wl_display_bind(display, id, &wl_compositor_interface);
 764         } else if (strcmp(interface, "wl_output") == 0) {
 765                 c->parent.output =
 766                         wl_display_bind(display, id, &wl_output_interface);
 767                 wl_output_add_listener(c->parent.output, &output_listener, c);
 768         } else if (strcmp(interface, "wl_shell") == 0) {
 769                 c->parent.shell =
 770                         wl_display_bind(display, id, &wl_shell_interface);
 771         }
 772 }
 773
 774 static int
 775 update_event_mask(uint32_t mask, void *data)
 776 {
 777         struct wayland_compositor *c = data;
 778
 779         c->parent.event_mask = mask;
 780         if (c->parent.wl_source)
 781                 wl_event_source_fd_update(c->parent.wl_source, mask);
 782
 783         return 0;
 784 }
 785
 786 static int
 787 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 788 {
 789         struct wayland_compositor *c = data;
 790
 791         if (mask & WL_EVENT_READABLE)
 792                 wl_display_iterate(c->parent.wl_display, WL_DISPLAY_READABLE);
 793         if (mask & WL_EVENT_WRITABLE)
 794                 wl_display_iterate(c->parent.wl_display, WL_DISPLAY_WRITABLE);
 795
 796         return 1;
 797 }
 798
 799 static int
 800 wayland_input_create(struct wayland_compositor *c)
 801 {
 802         struct weston_seat *seat;
 803
 804         seat = malloc(sizeof *seat);
 805         if (seat == NULL)
 806                 return -1;
 807
 808         memset(seat, 0, sizeof *seat);
 809         weston_seat_init(seat, &c->base);
 810
 811         c->base.seat = seat;
 812
 813         wl_display_add_global_listener(c->parent.wl_display,
 814                                        display_handle_global_input,
 815                                        c);
 816
 817         return 0;
 818 }
 819
 820 static void
 821 wayland_destroy(struct weston_compositor *ec)
 822 {
 823         weston_compositor_shutdown(ec);
 824
 825         free(ec);
 826 }
 827
 828 static struct weston_compositor *
 829 wayland_compositor_create(struct wl_display *display,
 830                           int width, int height, const char *display_name,
 831                           int argc, char *argv[], const char *config_file)
 832 {
 833         struct wayland_compositor *c;
 834         struct wl_event_loop *loop;
 835         int fd;
 836
 837         c = malloc(sizeof *c);
 838         if (c == NULL)
 839                 return NULL;
 840
 841         memset(c, 0, sizeof *c);
 842
 843         c->parent.wl_display = wl_display_connect(display_name);
 844
 845         if (c->parent.wl_display == NULL) {
 846                 weston_log("failed to create display: %m\n");
 847                 return NULL;
 848         }
 849
 850         wl_list_init(&c->input_list);
 851         wl_display_add_global_listener(c->parent.wl_display,
 852                                 display_handle_global, c);
 853
 854         wl_display_iterate(c->parent.wl_display, WL_DISPLAY_READABLE);
 855
 856         c->base.wl_display = display;
 857         if (wayland_compositor_init_egl(c) < 0)
 858                 return NULL;
 859
 860         c->base.destroy = wayland_destroy;
 861
 862         /* Can't init base class until we have a current egl context */
 863         if (weston_compositor_init(&c->base, display, argc, argv,
 864                                    config_file) < 0)
 865                 return NULL;
 866
 867         create_border(c);
 868         if (wayland_compositor_create_output(c, width, height) < 0)
 869                 return NULL;
 870
 871         if (wayland_input_create(c) < 0)
 872                 return NULL;
 873
 874         loop = wl_display_get_event_loop(c->base.wl_display);
 875
 876         fd = wl_display_get_fd(c->parent.wl_display, update_event_mask, c);
 877         c->parent.wl_source =
 878                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 879                                      wayland_compositor_handle_event, c);
 880         if (c->parent.wl_source == NULL)
 881                 return NULL;
 882
 883         return &c->base;
 884 }
 885
 886 WL_EXPORT struct weston_compositor *
 887 backend_init(struct wl_display *display, int argc, char *argv[],
 888              const char *config_file)
 889 {
 890         int width = 1024, height = 640;
 891         char *display_name = NULL;
 892
 893         const struct weston_option wayland_options[] = {
 894                 { WESTON_OPTION_INTEGER, "width", 0, &width },
 895                 { WESTON_OPTION_INTEGER, "height", 0, &height },
 896                 { WESTON_OPTION_STRING, "display", 0, &display_name },
 897         };
 898
 899         parse_options(wayland_options,
 900                       ARRAY_LENGTH(wayland_options), argc, argv);
 901
 902         return wayland_compositor_create(display, width, height, display_name,
 903                                          argc, argv, config_file);
 904 }