src/compositor-wayland.c

   1 /*
   2  * Copyright © 2010-2011 Benjamin Franzke
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stddef.h>
  28 #define _GNU_SOURCE
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34
  35 #include <wayland-client.h>
  36 #include <wayland-egl.h>
  37
  38 #include <GLES2/gl2.h>
  39 #include <GLES2/gl2ext.h>
  40 #include <EGL/egl.h>
  41 #include <EGL/eglext.h>
  42
  43 #include "compositor.h"
  44
  45 struct wayland_compositor {
  46         struct weston_compositor         base;
  47
  48         struct {
  49                 struct wl_display *display;
  50                 struct wl_compositor *compositor;
  51                 struct wl_shell *shell;
  52                 struct wl_output *output;
  53
  54                 struct {
  55                         int32_t x, y, width, height;
  56                 } screen_allocation;
  57
  58                 struct wl_event_source *wl_source;
  59                 uint32_t event_mask;
  60         } parent;
  61
  62         struct wl_list input_list;
  63 };
  64
  65 struct wayland_output {
  66         struct weston_output    base;
  67
  68         struct {
  69                 struct wl_surface       *surface;
  70                 struct wl_shell_surface *shell_surface;
  71                 struct wl_egl_window    *egl_window;
  72         } parent;
  73         EGLSurface egl_surface;
  74         struct weston_mode      mode;
  75 };
  76
  77 struct wayland_input {
  78         struct wayland_compositor *compositor;
  79         struct wl_input_device *input_device;
  80         struct wl_list link;
  81 };
  82
  83 static int
  84 wayland_input_create(struct wayland_compositor *c)
  85 {
  86         struct weston_input_device *input;
  87
  88         input = malloc(sizeof *input);
  89         if (input == NULL)
  90                 return -1;
  91
  92         memset(input, 0, sizeof *input);
  93         weston_input_device_init(input, &c->base);
  94
  95         c->base.input_device = &input->input_device;
  96
  97         return 0;
  98 }
  99
 100 static int
 101 wayland_compositor_init_egl(struct wayland_compositor *c)
 102 {
 103         EGLint major, minor;
 104         EGLint n;
 105         const char *extensions;
 106         EGLint config_attribs[] = {
 107                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 108                 EGL_RED_SIZE, 1,
 109                 EGL_GREEN_SIZE, 1,
 110                 EGL_BLUE_SIZE, 1,
 111                 EGL_ALPHA_SIZE, 0,
 112                 EGL_DEPTH_SIZE, 1,
 113                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 114                 EGL_NONE
 115         };
 116         static const EGLint context_attribs[] = {
 117                 EGL_CONTEXT_CLIENT_VERSION, 2,
 118                 EGL_NONE
 119         };
 120
 121         c->base.display = eglGetDisplay(c->parent.display);
 122         if (c->base.display == NULL) {
 123                 fprintf(stderr, "failed to create display\n");
 124                 return -1;
 125         }
 126
 127         if (!eglInitialize(c->base.display, &major, &minor)) {
 128                 fprintf(stderr, "failed to initialize display\n");
 129                 return -1;
 130         }
 131
 132         extensions = eglQueryString(c->base.display, EGL_EXTENSIONS);
 133         if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
 134                 fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
 135                 return -1;
 136         }
 137
 138         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 139                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 140                 return -1;
 141         }
 142         if (!eglChooseConfig(c->base.display, config_attribs,
 143                              &c->base.config, 1, &n) || n == 0) {
 144                 fprintf(stderr, "failed to choose config: %d\n", n);
 145                 return -1;
 146         }
 147
 148         c->base.context = eglCreateContext(c->base.display, c->base.config,
 149                                            EGL_NO_CONTEXT, context_attribs);
 150         if (c->base.context == NULL) {
 151                 fprintf(stderr, "failed to create context\n");
 152                 return -1;
 153         }
 154
 155         if (!eglMakeCurrent(c->base.display, EGL_NO_SURFACE,
 156                             EGL_NO_SURFACE, c->base.context)) {
 157                 fprintf(stderr, "failed to make context current\n");
 158                 return -1;
 159         }
 160
 161         return 0;
 162 }
 163
 164 static void
 165 frame_done(void *data, struct wl_callback *wl_callback, uint32_t time)
 166 {
 167         struct weston_output *output = data;
 168
 169         weston_output_finish_frame(output, time);
 170 }
 171
 172 static const struct wl_callback_listener frame_listener = {
 173         frame_done
 174 };
 175
 176 static void
 177 wayland_output_repaint(struct weston_output *output_base)
 178 {
 179         struct wayland_output *output = (struct wayland_output *) output_base;
 180         struct wayland_compositor *compositor =
 181                 (struct wayland_compositor *) output->base.compositor;
 182         struct wl_callback *callback;
 183         struct weston_surface *surface;
 184
 185         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 186                             output->egl_surface, compositor->base.context)) {
 187                 fprintf(stderr, "failed to make current\n");
 188                 return;
 189         }
 190
 191         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 192                 weston_surface_draw(surface, &output->base);
 193
 194         eglSwapBuffers(compositor->base.display, output->egl_surface);
 195         callback = wl_surface_frame(output->parent.surface);
 196         wl_callback_add_listener(callback, &frame_listener, output);
 197
 198         return;
 199 }
 200
 201 static int
 202 wayland_output_prepare_scanout_surface(struct weston_output *output_base,
 203                                        struct weston_surface *es)
 204 {
 205         return -1;
 206 }
 207
 208 static int
 209 wayland_output_set_cursor(struct weston_output *output_base,
 210                           struct weston_input_device *input)
 211 {
 212         return -1;
 213 }
 214
 215 static void
 216 wayland_output_destroy(struct weston_output *output_base)
 217 {
 218         struct wayland_output *output = (struct wayland_output *) output_base;
 219         struct weston_compositor *ec = output->base.compositor;
 220
 221         eglDestroySurface(ec->display, output->egl_surface);
 222         wl_egl_window_destroy(output->parent.egl_window);
 223         free(output);
 224
 225         return;
 226 }
 227
 228 static int
 229 wayland_compositor_create_output(struct wayland_compositor *c,
 230                                  int width, int height)
 231 {
 232         struct wayland_output *output;
 233
 234         output = malloc(sizeof *output);
 235         if (output == NULL)
 236                 return -1;
 237         memset(output, 0, sizeof *output);
 238
 239         output->mode.flags =
 240                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 241         output->mode.width = width;
 242         output->mode.height = height;
 243         output->mode.refresh = 60;
 244         wl_list_init(&output->base.mode_list);
 245         wl_list_insert(&output->base.mode_list, &output->mode.link);
 246
 247         output->base.current = &output->mode;
 248         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 249                          WL_OUTPUT_FLIPPED);
 250
 251         output->parent.surface =
 252                 wl_compositor_create_surface(c->parent.compositor);
 253         wl_surface_set_user_data(output->parent.surface, output);
 254
 255         output->parent.egl_window =
 256                 wl_egl_window_create(output->parent.surface, width, height);
 257         if (!output->parent.egl_window) {
 258                 fprintf(stderr, "failure to create wl_egl_window\n");
 259                 goto cleanup_output;
 260         }
 261
 262         output->egl_surface =
 263                 eglCreateWindowSurface(c->base.display, c->base.config,
 264                                        output->parent.egl_window, NULL);
 265         if (!output->egl_surface) {
 266                 fprintf(stderr, "failed to create window surface\n");
 267                 goto cleanup_window;
 268         }
 269
 270         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 271                             output->egl_surface, c->base.context)) {
 272                 fprintf(stderr, "failed to make surface current\n");
 273                 goto cleanup_surface;
 274                 return -1;
 275         }
 276
 277         output->parent.shell_surface =
 278                 wl_shell_get_shell_surface(c->parent.shell,
 279                                            output->parent.surface);
 280         /* FIXME: add shell_surface listener for resizing */
 281         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 282
 283         glClearColor(0, 0, 0, 0.5);
 284
 285         output->base.repaint = wayland_output_repaint;
 286         output->base.prepare_scanout_surface =
 287                 wayland_output_prepare_scanout_surface;
 288         output->base.set_hardware_cursor = wayland_output_set_cursor;
 289         output->base.destroy = wayland_output_destroy;
 290
 291         wl_list_insert(c->base.output_list.prev, &output->base.link);
 292
 293         return 0;
 294
 295 cleanup_surface:
 296         eglDestroySurface(c->base.display, output->egl_surface);
 297 cleanup_window:
 298         wl_egl_window_destroy(output->parent.egl_window);
 299 cleanup_output:
 300         /* FIXME: cleanup weston_output */
 301         free(output);
 302
 303         return -1;
 304 }
 305
 306 /* Events received from the wayland-server this compositor is client of: */
 307
 308 /* parent output interface */
 309 static void
 310 display_handle_geometry(void *data,
 311                         struct wl_output *wl_output,
 312                         int x,
 313                         int y,
 314                         int physical_width,
 315                         int physical_height,
 316                         int subpixel,
 317                         const char *make,
 318                         const char *model)
 319 {
 320         struct wayland_compositor *c = data;
 321
 322         c->parent.screen_allocation.x = x;
 323         c->parent.screen_allocation.y = y;
 324 }
 325
 326 static void
 327 display_handle_mode(void *data,
 328                     struct wl_output *wl_output,
 329                     uint32_t flags,
 330                     int width,
 331                     int height,
 332                     int refresh)
 333 {
 334         struct wayland_compositor *c = data;
 335
 336         c->parent.screen_allocation.width = width;
 337         c->parent.screen_allocation.height = height;
 338 }
 339
 340 static const struct wl_output_listener output_listener = {
 341         display_handle_geometry,
 342         display_handle_mode
 343 };
 344
 345 /* parent input interface */
 346 static void
 347 input_handle_motion(void *data, struct wl_input_device *input_device,
 348                      uint32_t time,
 349                      int32_t x, int32_t y, int32_t sx, int32_t sy)
 350 {
 351         struct wayland_input *input = data;
 352         struct wayland_compositor *c = input->compositor;
 353
 354         notify_motion(c->base.input_device, time, sx, sy);
 355 }
 356
 357 static void
 358 input_handle_button(void *data,
 359                      struct wl_input_device *input_device,
 360                      uint32_t time, uint32_t button, uint32_t state)
 361 {
 362         struct wayland_input *input = data;
 363         struct wayland_compositor *c = input->compositor;
 364
 365         notify_button(c->base.input_device, time, button, state);
 366 }
 367
 368 static void
 369 input_handle_key(void *data, struct wl_input_device *input_device,
 370                   uint32_t time, uint32_t key, uint32_t state)
 371 {
 372         struct wayland_input *input = data;
 373         struct wayland_compositor *c = input->compositor;
 374
 375         notify_key(c->base.input_device, time, key, state);
 376 }
 377
 378 static void
 379 input_handle_pointer_focus(void *data,
 380                             struct wl_input_device *input_device,
 381                             uint32_t time, struct wl_surface *surface,
 382                             int32_t x, int32_t y, int32_t sx, int32_t sy)
 383 {
 384         struct wayland_input *input = data;
 385         struct wayland_output *output;
 386         struct wayland_compositor *c = input->compositor;
 387
 388         if (surface) {
 389                 output = wl_surface_get_user_data(surface);
 390                 notify_pointer_focus(c->base.input_device,
 391                                      time, &output->base, sx, sy);
 392         } else {
 393                 notify_pointer_focus(c->base.input_device, time, NULL, 0, 0);
 394         }
 395 }
 396
 397 static void
 398 input_handle_keyboard_focus(void *data,
 399                              struct wl_input_device *input_device,
 400                              uint32_t time,
 401                              struct wl_surface *surface,
 402                              struct wl_array *keys)
 403 {
 404         struct wayland_input *input = data;
 405         struct wayland_compositor *c = input->compositor;
 406         struct wayland_output *output;
 407
 408         if (surface) {
 409                 output = wl_surface_get_user_data(surface);
 410                 notify_keyboard_focus(c->base.input_device,
 411                                       time, &output->base, keys);
 412         } else {
 413                 notify_keyboard_focus(c->base.input_device, time, NULL, NULL);
 414         }
 415 }
 416
 417 static const struct wl_input_device_listener input_device_listener = {
 418         input_handle_motion,
 419         input_handle_button,
 420         input_handle_key,
 421         input_handle_pointer_focus,
 422         input_handle_keyboard_focus,
 423 };
 424
 425 static void
 426 display_add_input(struct wayland_compositor *c, uint32_t id)
 427 {
 428         struct wayland_input *input;
 429
 430         input = malloc(sizeof *input);
 431         if (input == NULL)
 432                 return;
 433
 434         memset(input, 0, sizeof *input);
 435
 436         input->compositor = c;
 437         input->input_device = wl_display_bind(c->parent.display,
 438                                               id, &wl_input_device_interface);
 439         wl_list_insert(c->input_list.prev, &input->link);
 440
 441         wl_input_device_add_listener(input->input_device,
 442                                      &input_device_listener, input);
 443         wl_input_device_set_user_data(input->input_device, input);
 444 }
 445
 446 static void
 447 display_handle_global(struct wl_display *display, uint32_t id,
 448                       const char *interface, uint32_t version, void *data)
 449 {
 450         struct wayland_compositor *c = data;
 451
 452         if (strcmp(interface, "wl_compositor") == 0) {
 453                 c->parent.compositor =
 454                         wl_display_bind(display, id, &wl_compositor_interface);
 455         } else if (strcmp(interface, "wl_output") == 0) {
 456                 c->parent.output =
 457                         wl_display_bind(display, id, &wl_output_interface);
 458                 wl_output_add_listener(c->parent.output, &output_listener, c);
 459         } else if (strcmp(interface, "wl_input_device") == 0) {
 460                 display_add_input(c, id);
 461         } else if (strcmp(interface, "wl_shell") == 0) {
 462                 c->parent.shell =
 463                         wl_display_bind(display, id, &wl_shell_interface);
 464         }
 465 }
 466
 467 static int
 468 update_event_mask(uint32_t mask, void *data)
 469 {
 470         struct wayland_compositor *c = data;
 471
 472         c->parent.event_mask = mask;
 473         if (c->parent.wl_source)
 474                 wl_event_source_fd_update(c->parent.wl_source, mask);
 475
 476         return 0;
 477 }
 478
 479 static int
 480 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 481 {
 482         struct wayland_compositor *c = data;
 483
 484         if (mask & WL_EVENT_READABLE)
 485                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 486         if (mask & WL_EVENT_WRITABLE)
 487                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 488
 489         return 1;
 490 }
 491
 492 static void
 493 wayland_destroy(struct weston_compositor *ec)
 494 {
 495         weston_compositor_shutdown(ec);
 496
 497         free(ec);
 498 }
 499
 500 static struct weston_compositor *
 501 wayland_compositor_create(struct wl_display *display, int width, int height)
 502 {
 503         struct wayland_compositor *c;
 504         struct wl_event_loop *loop;
 505         int fd;
 506
 507         c = malloc(sizeof *c);
 508         if (c == NULL)
 509                 return NULL;
 510
 511         memset(c, 0, sizeof *c);
 512
 513         c->parent.display = wl_display_connect(NULL);
 514
 515         if (c->parent.display == NULL) {
 516                 fprintf(stderr, "failed to create display: %m\n");
 517                 return NULL;
 518         }
 519
 520         wl_list_init(&c->input_list);
 521         wl_display_add_global_listener(c->parent.display,
 522                                 display_handle_global, c);
 523
 524         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 525
 526         c->base.wl_display = display;
 527         if (wayland_compositor_init_egl(c) < 0)
 528                 return NULL;
 529
 530         c->base.destroy = wayland_destroy;
 531
 532         /* Can't init base class until we have a current egl context */
 533         if (weston_compositor_init(&c->base, display) < 0)
 534                 return NULL;
 535
 536         if (wayland_compositor_create_output(c, width, height) < 0)
 537                 return NULL;
 538
 539         if (wayland_input_create(c) < 0)
 540                 return NULL;
 541
 542         loop = wl_display_get_event_loop(c->base.wl_display);
 543
 544         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 545         c->parent.wl_source =
 546                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 547                                      wayland_compositor_handle_event, c);
 548         if (c->parent.wl_source == NULL)
 549                 return NULL;
 550
 551         return &c->base;
 552 }
 553
 554 struct weston_compositor *
 555 backend_init(struct wl_display *display, char *options);
 556
 557 WL_EXPORT struct weston_compositor *
 558 backend_init(struct wl_display *display, char *options)
 559 {
 560         int width = 1024, height = 640, i;
 561         char *p, *value;
 562
 563         static char * const tokens[] = { "width", "height", NULL };
 564
 565         p = options;
 566         while (i = getsubopt(&p, tokens, &value), i != -1) {
 567                 switch (i) {
 568                 case 0:
 569                         width = strtol(value, NULL, 0);
 570                         break;
 571                 case 1:
 572                         height = strtol(value, NULL, 0);
 573                         break;
 574                 }
 575         }
 576
 577         return wayland_compositor_create(display, width, height);
 578 }