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 *callback, uint32_t time)
 166 {
 167         struct weston_output *output = data;
 168
 169         wl_callback_destroy(callback);
 170         weston_output_finish_frame(output, time);
 171 }
 172
 173 static const struct wl_callback_listener frame_listener = {
 174         frame_done
 175 };
 176
 177 static void
 178 wayland_output_repaint(struct weston_output *output_base)
 179 {
 180         struct wayland_output *output = (struct wayland_output *) output_base;
 181         struct wayland_compositor *compositor =
 182                 (struct wayland_compositor *) output->base.compositor;
 183         struct wl_callback *callback;
 184         struct weston_surface *surface;
 185
 186         if (!eglMakeCurrent(compositor->base.display, output->egl_surface,
 187                             output->egl_surface, compositor->base.context)) {
 188                 fprintf(stderr, "failed to make current\n");
 189                 return;
 190         }
 191
 192         wl_list_for_each_reverse(surface, &compositor->base.surface_list, link)
 193                 weston_surface_draw(surface, &output->base);
 194
 195         eglSwapBuffers(compositor->base.display, output->egl_surface);
 196         callback = wl_surface_frame(output->parent.surface);
 197         wl_callback_add_listener(callback, &frame_listener, output);
 198
 199         return;
 200 }
 201
 202 static int
 203 wayland_output_set_cursor(struct weston_output *output_base,
 204                           struct weston_input_device *input)
 205 {
 206         return -1;
 207 }
 208
 209 static void
 210 wayland_output_destroy(struct weston_output *output_base)
 211 {
 212         struct wayland_output *output = (struct wayland_output *) output_base;
 213         struct weston_compositor *ec = output->base.compositor;
 214
 215         eglDestroySurface(ec->display, output->egl_surface);
 216         wl_egl_window_destroy(output->parent.egl_window);
 217         free(output);
 218
 219         return;
 220 }
 221
 222 static int
 223 wayland_compositor_create_output(struct wayland_compositor *c,
 224                                  int width, int height)
 225 {
 226         struct wayland_output *output;
 227
 228         output = malloc(sizeof *output);
 229         if (output == NULL)
 230                 return -1;
 231         memset(output, 0, sizeof *output);
 232
 233         output->mode.flags =
 234                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 235         output->mode.width = width;
 236         output->mode.height = height;
 237         output->mode.refresh = 60;
 238         wl_list_init(&output->base.mode_list);
 239         wl_list_insert(&output->base.mode_list, &output->mode.link);
 240
 241         output->base.current = &output->mode;
 242         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 243                          WL_OUTPUT_FLIPPED);
 244
 245         output->parent.surface =
 246                 wl_compositor_create_surface(c->parent.compositor);
 247         wl_surface_set_user_data(output->parent.surface, output);
 248
 249         output->parent.egl_window =
 250                 wl_egl_window_create(output->parent.surface, width, height);
 251         if (!output->parent.egl_window) {
 252                 fprintf(stderr, "failure to create wl_egl_window\n");
 253                 goto cleanup_output;
 254         }
 255
 256         output->egl_surface =
 257                 eglCreateWindowSurface(c->base.display, c->base.config,
 258                                        output->parent.egl_window, NULL);
 259         if (!output->egl_surface) {
 260                 fprintf(stderr, "failed to create window surface\n");
 261                 goto cleanup_window;
 262         }
 263
 264         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 265                             output->egl_surface, c->base.context)) {
 266                 fprintf(stderr, "failed to make surface current\n");
 267                 goto cleanup_surface;
 268                 return -1;
 269         }
 270
 271         output->parent.shell_surface =
 272                 wl_shell_get_shell_surface(c->parent.shell,
 273                                            output->parent.surface);
 274         /* FIXME: add shell_surface listener for resizing */
 275         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 276
 277         glClearColor(0, 0, 0, 0.5);
 278
 279         output->base.repaint = wayland_output_repaint;
 280         output->base.set_hardware_cursor = wayland_output_set_cursor;
 281         output->base.destroy = wayland_output_destroy;
 282
 283         wl_list_insert(c->base.output_list.prev, &output->base.link);
 284
 285         return 0;
 286
 287 cleanup_surface:
 288         eglDestroySurface(c->base.display, output->egl_surface);
 289 cleanup_window:
 290         wl_egl_window_destroy(output->parent.egl_window);
 291 cleanup_output:
 292         /* FIXME: cleanup weston_output */
 293         free(output);
 294
 295         return -1;
 296 }
 297
 298 /* Events received from the wayland-server this compositor is client of: */
 299
 300 /* parent output interface */
 301 static void
 302 display_handle_geometry(void *data,
 303                         struct wl_output *wl_output,
 304                         int x,
 305                         int y,
 306                         int physical_width,
 307                         int physical_height,
 308                         int subpixel,
 309                         const char *make,
 310                         const char *model)
 311 {
 312         struct wayland_compositor *c = data;
 313
 314         c->parent.screen_allocation.x = x;
 315         c->parent.screen_allocation.y = y;
 316 }
 317
 318 static void
 319 display_handle_mode(void *data,
 320                     struct wl_output *wl_output,
 321                     uint32_t flags,
 322                     int width,
 323                     int height,
 324                     int refresh)
 325 {
 326         struct wayland_compositor *c = data;
 327
 328         c->parent.screen_allocation.width = width;
 329         c->parent.screen_allocation.height = height;
 330 }
 331
 332 static const struct wl_output_listener output_listener = {
 333         display_handle_geometry,
 334         display_handle_mode
 335 };
 336
 337 /* parent input interface */
 338 static void
 339 input_handle_motion(void *data, struct wl_input_device *input_device,
 340                      uint32_t time,
 341                      int32_t x, int32_t y, int32_t sx, int32_t sy)
 342 {
 343         struct wayland_input *input = data;
 344         struct wayland_compositor *c = input->compositor;
 345
 346         notify_motion(c->base.input_device, time, sx, sy);
 347 }
 348
 349 static void
 350 input_handle_button(void *data,
 351                      struct wl_input_device *input_device,
 352                      uint32_t time, uint32_t button, uint32_t state)
 353 {
 354         struct wayland_input *input = data;
 355         struct wayland_compositor *c = input->compositor;
 356
 357         notify_button(c->base.input_device, time, button, state);
 358 }
 359
 360 static void
 361 input_handle_key(void *data, struct wl_input_device *input_device,
 362                   uint32_t time, uint32_t key, uint32_t state)
 363 {
 364         struct wayland_input *input = data;
 365         struct wayland_compositor *c = input->compositor;
 366
 367         notify_key(c->base.input_device, time, key, state);
 368 }
 369
 370 static void
 371 input_handle_pointer_focus(void *data,
 372                             struct wl_input_device *input_device,
 373                             uint32_t time, struct wl_surface *surface,
 374                             int32_t x, int32_t y, int32_t sx, int32_t sy)
 375 {
 376         struct wayland_input *input = data;
 377         struct wayland_output *output;
 378         struct wayland_compositor *c = input->compositor;
 379
 380         if (surface) {
 381                 output = wl_surface_get_user_data(surface);
 382                 notify_pointer_focus(c->base.input_device,
 383                                      time, &output->base, sx, sy);
 384
 385                 wl_input_device_attach(input->input_device, time, NULL, 0, 0);
 386         } else {
 387                 notify_pointer_focus(c->base.input_device, time, NULL, 0, 0);
 388         }
 389 }
 390
 391 static void
 392 input_handle_keyboard_focus(void *data,
 393                              struct wl_input_device *input_device,
 394                              uint32_t time,
 395                              struct wl_surface *surface,
 396                              struct wl_array *keys)
 397 {
 398         struct wayland_input *input = data;
 399         struct wayland_compositor *c = input->compositor;
 400         struct wayland_output *output;
 401
 402         if (surface) {
 403                 output = wl_surface_get_user_data(surface);
 404                 notify_keyboard_focus(c->base.input_device,
 405                                       time, &output->base, keys);
 406         } else {
 407                 notify_keyboard_focus(c->base.input_device, time, NULL, NULL);
 408         }
 409 }
 410
 411 static const struct wl_input_device_listener input_device_listener = {
 412         input_handle_motion,
 413         input_handle_button,
 414         input_handle_key,
 415         input_handle_pointer_focus,
 416         input_handle_keyboard_focus,
 417 };
 418
 419 static void
 420 display_add_input(struct wayland_compositor *c, uint32_t id)
 421 {
 422         struct wayland_input *input;
 423
 424         input = malloc(sizeof *input);
 425         if (input == NULL)
 426                 return;
 427
 428         memset(input, 0, sizeof *input);
 429
 430         input->compositor = c;
 431         input->input_device = wl_display_bind(c->parent.display,
 432                                               id, &wl_input_device_interface);
 433         wl_list_insert(c->input_list.prev, &input->link);
 434
 435         wl_input_device_add_listener(input->input_device,
 436                                      &input_device_listener, input);
 437         wl_input_device_set_user_data(input->input_device, input);
 438 }
 439
 440 static void
 441 display_handle_global(struct wl_display *display, uint32_t id,
 442                       const char *interface, uint32_t version, void *data)
 443 {
 444         struct wayland_compositor *c = data;
 445
 446         if (strcmp(interface, "wl_compositor") == 0) {
 447                 c->parent.compositor =
 448                         wl_display_bind(display, id, &wl_compositor_interface);
 449         } else if (strcmp(interface, "wl_output") == 0) {
 450                 c->parent.output =
 451                         wl_display_bind(display, id, &wl_output_interface);
 452                 wl_output_add_listener(c->parent.output, &output_listener, c);
 453         } else if (strcmp(interface, "wl_input_device") == 0) {
 454                 display_add_input(c, id);
 455         } else if (strcmp(interface, "wl_shell") == 0) {
 456                 c->parent.shell =
 457                         wl_display_bind(display, id, &wl_shell_interface);
 458         }
 459 }
 460
 461 static int
 462 update_event_mask(uint32_t mask, void *data)
 463 {
 464         struct wayland_compositor *c = data;
 465
 466         c->parent.event_mask = mask;
 467         if (c->parent.wl_source)
 468                 wl_event_source_fd_update(c->parent.wl_source, mask);
 469
 470         return 0;
 471 }
 472
 473 static int
 474 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 475 {
 476         struct wayland_compositor *c = data;
 477
 478         if (mask & WL_EVENT_READABLE)
 479                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 480         if (mask & WL_EVENT_WRITABLE)
 481                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 482
 483         return 1;
 484 }
 485
 486 static void
 487 wayland_destroy(struct weston_compositor *ec)
 488 {
 489         weston_compositor_shutdown(ec);
 490
 491         free(ec);
 492 }
 493
 494 static struct weston_compositor *
 495 wayland_compositor_create(struct wl_display *display,
 496                           int width, int height, const char *display_name)
 497 {
 498         struct wayland_compositor *c;
 499         struct wl_event_loop *loop;
 500         int fd;
 501
 502         c = malloc(sizeof *c);
 503         if (c == NULL)
 504                 return NULL;
 505
 506         memset(c, 0, sizeof *c);
 507
 508         c->parent.display = wl_display_connect(display_name);
 509
 510         if (c->parent.display == NULL) {
 511                 fprintf(stderr, "failed to create display: %m\n");
 512                 return NULL;
 513         }
 514
 515         wl_list_init(&c->input_list);
 516         wl_display_add_global_listener(c->parent.display,
 517                                 display_handle_global, c);
 518
 519         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 520
 521         c->base.wl_display = display;
 522         if (wayland_compositor_init_egl(c) < 0)
 523                 return NULL;
 524
 525         c->base.destroy = wayland_destroy;
 526
 527         /* Can't init base class until we have a current egl context */
 528         if (weston_compositor_init(&c->base, display) < 0)
 529                 return NULL;
 530
 531         if (wayland_compositor_create_output(c, width, height) < 0)
 532                 return NULL;
 533
 534         if (wayland_input_create(c) < 0)
 535                 return NULL;
 536
 537         loop = wl_display_get_event_loop(c->base.wl_display);
 538
 539         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 540         c->parent.wl_source =
 541                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 542                                      wayland_compositor_handle_event, c);
 543         if (c->parent.wl_source == NULL)
 544                 return NULL;
 545
 546         return &c->base;
 547 }
 548
 549 struct weston_compositor *
 550 backend_init(struct wl_display *display, char *options);
 551
 552 WL_EXPORT struct weston_compositor *
 553 backend_init(struct wl_display *display, char *options)
 554 {
 555         int width = 1024, height = 640, i;
 556         char *p, *value, *display_name = NULL;
 557
 558         static char * const tokens[] = { "width", "height", "display", NULL };
 559
 560         p = options;
 561         while (i = getsubopt(&p, tokens, &value), i != -1) {
 562                 switch (i) {
 563                 case 0:
 564                         width = strtol(value, NULL, 0);
 565                         break;
 566                 case 1:
 567                         height = strtol(value, NULL, 0);
 568                         break;
 569                 case 2:
 570                         display_name = strdup(value);
 571                         break;
 572                 }
 573         }
 574
 575         return wayland_compositor_create(display, width, height, display_name);
 576 }