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 int
 165 wayland_output_prepare_render(struct weston_output *output_base)
 166 {
 167         struct wayland_output *output = (struct wayland_output *) output_base;
 168         struct weston_compositor *ec = output->base.compositor;
 169
 170         if (!eglMakeCurrent(ec->display, output->egl_surface,
 171                             output->egl_surface, ec->context)) {
 172                 fprintf(stderr, "failed to make current\n");
 173                 return -1;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static void
 180 wayland_output_repaint(struct weston_output *output)
 181 {
 182         struct weston_compositor *compositor = output->compositor;
 183         struct weston_surface *surface;
 184
 185         wl_list_for_each_reverse(surface, &compositor->surface_list, link)
 186                 weston_surface_draw(surface, output);
 187 }
 188
 189 static void
 190 frame_done(void *data, struct wl_callback *wl_callback, uint32_t time)
 191 {
 192         struct weston_output *output = data;
 193
 194         weston_output_finish_frame(output, time);
 195 }
 196
 197 static const struct wl_callback_listener frame_listener = {
 198         frame_done
 199 };
 200
 201 static int
 202 wayland_output_present(struct weston_output *output_base)
 203 {
 204         struct wayland_output *output = (struct wayland_output *) output_base;
 205         struct wayland_compositor *c =
 206                 (struct wayland_compositor *) output->base.compositor;
 207         struct wl_callback *callback;
 208
 209         if (wayland_output_prepare_render(&output->base))
 210                 return -1;
 211
 212         eglSwapBuffers(c->base.display, output->egl_surface);
 213         callback = wl_surface_frame(output->parent.surface);
 214         wl_callback_add_listener(callback, &frame_listener, output);
 215
 216         return 0;
 217 }
 218
 219 static int
 220 wayland_output_prepare_scanout_surface(struct weston_output *output_base,
 221                                        struct weston_surface *es)
 222 {
 223         return -1;
 224 }
 225
 226 static int
 227 wayland_output_set_cursor(struct weston_output *output_base,
 228                           struct weston_input_device *input)
 229 {
 230         return -1;
 231 }
 232
 233 static void
 234 wayland_output_destroy(struct weston_output *output_base)
 235 {
 236         struct wayland_output *output = (struct wayland_output *) output_base;
 237         struct weston_compositor *ec = output->base.compositor;
 238
 239         eglDestroySurface(ec->display, output->egl_surface);
 240         wl_egl_window_destroy(output->parent.egl_window);
 241         free(output);
 242
 243         return;
 244 }
 245
 246 static int
 247 wayland_compositor_create_output(struct wayland_compositor *c,
 248                                  int width, int height)
 249 {
 250         struct wayland_output *output;
 251
 252         output = malloc(sizeof *output);
 253         if (output == NULL)
 254                 return -1;
 255         memset(output, 0, sizeof *output);
 256
 257         output->mode.flags =
 258                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 259         output->mode.width = width;
 260         output->mode.height = height;
 261         output->mode.refresh = 60;
 262         wl_list_init(&output->base.mode_list);
 263         wl_list_insert(&output->base.mode_list, &output->mode.link);
 264
 265         output->base.current = &output->mode;
 266         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 267                          WL_OUTPUT_FLIPPED);
 268
 269         output->parent.surface =
 270                 wl_compositor_create_surface(c->parent.compositor);
 271         wl_surface_set_user_data(output->parent.surface, output);
 272
 273         output->parent.egl_window =
 274                 wl_egl_window_create(output->parent.surface, width, height);
 275         if (!output->parent.egl_window) {
 276                 fprintf(stderr, "failure to create wl_egl_window\n");
 277                 goto cleanup_output;
 278         }
 279
 280         output->egl_surface =
 281                 eglCreateWindowSurface(c->base.display, c->base.config,
 282                                        output->parent.egl_window, NULL);
 283         if (!output->egl_surface) {
 284                 fprintf(stderr, "failed to create window surface\n");
 285                 goto cleanup_window;
 286         }
 287
 288         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 289                             output->egl_surface, c->base.context)) {
 290                 fprintf(stderr, "failed to make surface current\n");
 291                 goto cleanup_surface;
 292                 return -1;
 293         }
 294
 295         output->parent.shell_surface =
 296                 wl_shell_get_shell_surface(c->parent.shell,
 297                                            output->parent.surface);
 298         /* FIXME: add shell_surface listener for resizing */
 299         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 300
 301         glClearColor(0, 0, 0, 0.5);
 302
 303         output->base.prepare_render = wayland_output_prepare_render;
 304         output->base.repaint = wayland_output_repaint;
 305         output->base.present = wayland_output_present;
 306         output->base.prepare_scanout_surface =
 307                 wayland_output_prepare_scanout_surface;
 308         output->base.set_hardware_cursor = wayland_output_set_cursor;
 309         output->base.destroy = wayland_output_destroy;
 310
 311         wl_list_insert(c->base.output_list.prev, &output->base.link);
 312
 313         return 0;
 314
 315 cleanup_surface:
 316         eglDestroySurface(c->base.display, output->egl_surface);
 317 cleanup_window:
 318         wl_egl_window_destroy(output->parent.egl_window);
 319 cleanup_output:
 320         /* FIXME: cleanup weston_output */
 321         free(output);
 322
 323         return -1;
 324 }
 325
 326 /* Events received from the wayland-server this compositor is client of: */
 327
 328 /* parent output interface */
 329 static void
 330 display_handle_geometry(void *data,
 331                         struct wl_output *wl_output,
 332                         int x,
 333                         int y,
 334                         int physical_width,
 335                         int physical_height,
 336                         int subpixel,
 337                         const char *make,
 338                         const char *model)
 339 {
 340         struct wayland_compositor *c = data;
 341
 342         c->parent.screen_allocation.x = x;
 343         c->parent.screen_allocation.y = y;
 344 }
 345
 346 static void
 347 display_handle_mode(void *data,
 348                     struct wl_output *wl_output,
 349                     uint32_t flags,
 350                     int width,
 351                     int height,
 352                     int refresh)
 353 {
 354         struct wayland_compositor *c = data;
 355
 356         c->parent.screen_allocation.width = width;
 357         c->parent.screen_allocation.height = height;
 358 }
 359
 360 static const struct wl_output_listener output_listener = {
 361         display_handle_geometry,
 362         display_handle_mode
 363 };
 364
 365 /* parent input interface */
 366 static void
 367 input_handle_motion(void *data, struct wl_input_device *input_device,
 368                      uint32_t time,
 369                      int32_t x, int32_t y, int32_t sx, int32_t sy)
 370 {
 371         struct wayland_input *input = data;
 372         struct wayland_compositor *c = input->compositor;
 373
 374         notify_motion(c->base.input_device, time, sx, sy);
 375 }
 376
 377 static void
 378 input_handle_button(void *data,
 379                      struct wl_input_device *input_device,
 380                      uint32_t time, uint32_t button, uint32_t state)
 381 {
 382         struct wayland_input *input = data;
 383         struct wayland_compositor *c = input->compositor;
 384
 385         notify_button(c->base.input_device, time, button, state);
 386 }
 387
 388 static void
 389 input_handle_key(void *data, struct wl_input_device *input_device,
 390                   uint32_t time, uint32_t key, uint32_t state)
 391 {
 392         struct wayland_input *input = data;
 393         struct wayland_compositor *c = input->compositor;
 394
 395         notify_key(c->base.input_device, time, key, state);
 396 }
 397
 398 static void
 399 input_handle_pointer_focus(void *data,
 400                             struct wl_input_device *input_device,
 401                             uint32_t time, struct wl_surface *surface,
 402                             int32_t x, int32_t y, int32_t sx, int32_t sy)
 403 {
 404         struct wayland_input *input = data;
 405         struct wayland_output *output;
 406         struct wayland_compositor *c = input->compositor;
 407
 408         if (surface) {
 409                 output = wl_surface_get_user_data(surface);
 410                 notify_pointer_focus(c->base.input_device,
 411                                      time, &output->base, sx, sy);
 412         } else {
 413                 notify_pointer_focus(c->base.input_device, time, NULL, 0, 0);
 414         }
 415 }
 416
 417 static void
 418 input_handle_keyboard_focus(void *data,
 419                              struct wl_input_device *input_device,
 420                              uint32_t time,
 421                              struct wl_surface *surface,
 422                              struct wl_array *keys)
 423 {
 424         struct wayland_input *input = data;
 425         struct wayland_compositor *c = input->compositor;
 426         struct wayland_output *output;
 427
 428         if (surface) {
 429                 output = wl_surface_get_user_data(surface);
 430                 notify_keyboard_focus(c->base.input_device,
 431                                       time, &output->base, keys);
 432         } else {
 433                 notify_keyboard_focus(c->base.input_device, time, NULL, NULL);
 434         }
 435 }
 436
 437 static const struct wl_input_device_listener input_device_listener = {
 438         input_handle_motion,
 439         input_handle_button,
 440         input_handle_key,
 441         input_handle_pointer_focus,
 442         input_handle_keyboard_focus,
 443 };
 444
 445 static void
 446 display_add_input(struct wayland_compositor *c, uint32_t id)
 447 {
 448         struct wayland_input *input;
 449
 450         input = malloc(sizeof *input);
 451         if (input == NULL)
 452                 return;
 453
 454         memset(input, 0, sizeof *input);
 455
 456         input->compositor = c;
 457         input->input_device = wl_display_bind(c->parent.display,
 458                                               id, &wl_input_device_interface);
 459         wl_list_insert(c->input_list.prev, &input->link);
 460
 461         wl_input_device_add_listener(input->input_device,
 462                                      &input_device_listener, input);
 463         wl_input_device_set_user_data(input->input_device, input);
 464 }
 465
 466 static void
 467 display_handle_global(struct wl_display *display, uint32_t id,
 468                       const char *interface, uint32_t version, void *data)
 469 {
 470         struct wayland_compositor *c = data;
 471
 472         if (strcmp(interface, "wl_compositor") == 0) {
 473                 c->parent.compositor =
 474                         wl_display_bind(display, id, &wl_compositor_interface);
 475         } else if (strcmp(interface, "wl_output") == 0) {
 476                 c->parent.output =
 477                         wl_display_bind(display, id, &wl_output_interface);
 478                 wl_output_add_listener(c->parent.output, &output_listener, c);
 479         } else if (strcmp(interface, "wl_input_device") == 0) {
 480                 display_add_input(c, id);
 481         } else if (strcmp(interface, "wl_shell") == 0) {
 482                 c->parent.shell =
 483                         wl_display_bind(display, id, &wl_shell_interface);
 484         }
 485 }
 486
 487 static int
 488 update_event_mask(uint32_t mask, void *data)
 489 {
 490         struct wayland_compositor *c = data;
 491
 492         c->parent.event_mask = mask;
 493         if (c->parent.wl_source)
 494                 wl_event_source_fd_update(c->parent.wl_source, mask);
 495
 496         return 0;
 497 }
 498
 499 static int
 500 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 501 {
 502         struct wayland_compositor *c = data;
 503
 504         if (mask & WL_EVENT_READABLE)
 505                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 506         if (mask & WL_EVENT_WRITABLE)
 507                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 508
 509         return 1;
 510 }
 511
 512 static void
 513 wayland_destroy(struct weston_compositor *ec)
 514 {
 515         weston_compositor_shutdown(ec);
 516
 517         free(ec);
 518 }
 519
 520 static struct weston_compositor *
 521 wayland_compositor_create(struct wl_display *display, int width, int height)
 522 {
 523         struct wayland_compositor *c;
 524         struct wl_event_loop *loop;
 525         int fd;
 526
 527         c = malloc(sizeof *c);
 528         if (c == NULL)
 529                 return NULL;
 530
 531         memset(c, 0, sizeof *c);
 532
 533         c->parent.display = wl_display_connect(NULL);
 534
 535         if (c->parent.display == NULL) {
 536                 fprintf(stderr, "failed to create display: %m\n");
 537                 return NULL;
 538         }
 539
 540         wl_list_init(&c->input_list);
 541         wl_display_add_global_listener(c->parent.display,
 542                                 display_handle_global, c);
 543
 544         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 545
 546         c->base.wl_display = display;
 547         if (wayland_compositor_init_egl(c) < 0)
 548                 return NULL;
 549
 550         c->base.destroy = wayland_destroy;
 551
 552         /* Can't init base class until we have a current egl context */
 553         if (weston_compositor_init(&c->base, display) < 0)
 554                 return NULL;
 555
 556         if (wayland_compositor_create_output(c, width, height) < 0)
 557                 return NULL;
 558
 559         if (wayland_input_create(c) < 0)
 560                 return NULL;
 561
 562         loop = wl_display_get_event_loop(c->base.wl_display);
 563
 564         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 565         c->parent.wl_source =
 566                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 567                                      wayland_compositor_handle_event, c);
 568         if (c->parent.wl_source == NULL)
 569                 return NULL;
 570
 571         return &c->base;
 572 }
 573
 574 struct weston_compositor *
 575 backend_init(struct wl_display *display, char *options);
 576
 577 WL_EXPORT struct weston_compositor *
 578 backend_init(struct wl_display *display, char *options)
 579 {
 580         int width = 1024, height = 640, i;
 581         char *p, *value;
 582
 583         static char * const tokens[] = { "width", "height", NULL };
 584
 585         p = options;
 586         while (i = getsubopt(&p, tokens, &value), i != -1) {
 587                 switch (i) {
 588                 case 0:
 589                         width = strtol(value, NULL, 0);
 590                         break;
 591                 case 1:
 592                         height = strtol(value, NULL, 0);
 593                         break;
 594                 }
 595         }
 596
 597         return wayland_compositor_create(display, width, height);
 598 }