compositor/compositor-drm.c

   1 /*
   2  * Copyright © 2008-2010 Kristian Høgsberg
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <fcntl.h>
  25 #include <unistd.h>
  26
  27 #include <xf86drm.h>
  28 #include <xf86drmMode.h>
  29
  30 #include "compositor.h"
  31
  32 struct drm_compositor {
  33         struct wlsc_compositor base;
  34
  35         struct udev *udev;
  36         struct wl_event_source *drm_source;
  37
  38         struct udev_monitor *udev_monitor;
  39         struct wl_event_source *udev_drm_source;
  40
  41         struct {
  42                 int fd;
  43         } drm;
  44         uint32_t crtc_allocator;
  45         uint32_t connector_allocator;
  46         struct tty *tty;
  47
  48         PFNEGLCREATEDRMIMAGEMESA create_drm_image;
  49         PFNEGLEXPORTDRMIMAGEMESA export_drm_image;
  50 };
  51
  52 struct drm_output {
  53         struct wlsc_output   base;
  54
  55         drmModeModeInfo mode;
  56         uint32_t crtc_id;
  57         uint32_t connector_id;
  58         GLuint rbo[2];
  59         uint32_t fb_id[2];
  60         EGLImageKHR image[2];
  61         uint32_t current;
  62
  63         struct wlsc_surface *scanout_surface;
  64
  65         uint32_t fs_surf_fb_id;
  66         uint32_t pending_fs_surf_fb_id;
  67 };
  68
  69 static int
  70 drm_output_prepare_render(struct wlsc_output *output_base)
  71 {
  72         struct drm_output *output = (struct drm_output *) output_base;
  73
  74         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
  75                                   GL_COLOR_ATTACHMENT0,
  76                                   GL_RENDERBUFFER,
  77                                   output->rbo[output->current]);
  78
  79         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
  80                 return -1;
  81
  82         return 0;
  83 }
  84
  85 static int
  86 drm_output_present(struct wlsc_output *output_base)
  87 {
  88         struct drm_output *output = (struct drm_output *) output_base;
  89         struct drm_compositor *c =
  90                 (struct drm_compositor *) output->base.compositor;
  91         uint32_t fb_id = 0;
  92
  93         if (drm_output_prepare_render(&output->base))
  94                 return -1;
  95         glFlush();
  96
  97         output->current ^= 1;
  98
  99         if (output->scanout_surface != NULL) {
 100                 output->scanout_surface = NULL;
 101                 fb_id = output->fs_surf_fb_id;
 102         } else {
 103                 fb_id = output->fb_id[output->current ^ 1];
 104         }
 105
 106         drmModePageFlip(c->drm.fd, output->crtc_id,
 107                         fb_id,
 108                         DRM_MODE_PAGE_FLIP_EVENT, output);
 109
 110         return 0;
 111 }
 112
 113 static void
 114 page_flip_handler(int fd, unsigned int frame,
 115                   unsigned int sec, unsigned int usec, void *data)
 116 {
 117         struct drm_output *output = (struct drm_output *) data;
 118         struct drm_compositor *c =
 119                 (struct drm_compositor *) output->base.compositor;
 120         uint32_t msecs;
 121
 122         if (output->pending_fs_surf_fb_id) {
 123                 drmModeRmFB(c->drm.fd, output->pending_fs_surf_fb_id);
 124                 output->pending_fs_surf_fb_id = 0;
 125         }
 126
 127         if (output->fs_surf_fb_id) {
 128                 output->pending_fs_surf_fb_id = output->fs_surf_fb_id;
 129                 output->fs_surf_fb_id = 0;
 130         }
 131
 132         msecs = sec * 1000 + usec / 1000;
 133         wlsc_output_finish_frame(&output->base, msecs);
 134 }
 135
 136 static int
 137 drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
 138                                    struct wlsc_surface *es)
 139 {
 140         struct drm_output *output = (struct drm_output *) output_base;
 141         struct drm_compositor *c =
 142                 (struct drm_compositor *) output->base.compositor;
 143         EGLint handle, stride;
 144         int ret;
 145         uint32_t fb_id = 0;
 146
 147         if (es->x != output->base.x ||
 148             es->y != output->base.y ||
 149             es->width != output->base.width ||
 150             es->height != output->base.height ||
 151             es->image == EGL_NO_IMAGE_KHR)
 152                 return -1;
 153
 154         c->export_drm_image(c->base.display,
 155                             es->image, NULL, &handle, &stride);
 156
 157         if (handle == 0)
 158                 return -1;
 159
 160         ret = drmModeAddFB(c->drm.fd,
 161                            output->base.width, output->base.height,
 162                            32, 32, stride, handle, &fb_id);
 163
 164         if (ret)
 165                 return -1;
 166
 167         output->fs_surf_fb_id = fb_id;
 168         output->scanout_surface = es;
 169
 170         return 0;
 171 }
 172
 173 static int
 174 drm_output_set_cursor(struct wlsc_output *output_base,
 175                       struct wlsc_input_device *eid)
 176 {
 177         struct drm_output *output = (struct drm_output *) output_base;
 178         struct drm_compositor *c =
 179                 (struct drm_compositor *) output->base.compositor;
 180         EGLint handle, stride;
 181         int ret = -1;
 182         pixman_region32_t cursor_region;
 183
 184         if (eid == NULL) {
 185                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 186                 return 0;
 187         }
 188
 189         pixman_region32_init_rect(&cursor_region,
 190                                   eid->sprite->x, eid->sprite->y,
 191                                   eid->sprite->width, eid->sprite->height);
 192
 193         pixman_region32_intersect_rect(&cursor_region, &cursor_region,
 194                                        output->base.x, output->base.y,
 195                                        output->base.width, output->base.height);
 196
 197         if (!pixman_region32_not_empty(&cursor_region)) {
 198                 ret = 0;
 199                 goto out;
 200         }
 201
 202         if (eid->sprite->image == EGL_NO_IMAGE_KHR)
 203                 goto out;
 204
 205         if (eid->sprite->width > 64 || eid->sprite->height > 64)
 206                 goto out;
 207
 208         c->export_drm_image(c->base.display, eid->sprite->image,
 209                             NULL, &handle, &stride);
 210
 211         if (stride != 64 * 4) {
 212                 fprintf(stderr, "info: cursor stride is != 64\n");
 213                 goto out;
 214         }
 215
 216         ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
 217         if (ret) {
 218                 fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
 219                 goto out;
 220         }
 221
 222         ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
 223                                 eid->sprite->x - output->base.x,
 224                                 eid->sprite->y - output->base.y);
 225         if (ret) {
 226                 fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
 227                 goto out;
 228         }
 229
 230         printf("info: set hardware cursor\n");
 231
 232 out:
 233         pixman_region32_fini(&cursor_region);
 234         if (ret)
 235                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 236         return ret;
 237 }
 238
 239 static int
 240 on_drm_input(int fd, uint32_t mask, void *data)
 241 {
 242         drmEventContext evctx;
 243
 244         memset(&evctx, 0, sizeof evctx);
 245         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 246         evctx.page_flip_handler = page_flip_handler;
 247         drmHandleEvent(fd, &evctx);
 248
 249         return 1;
 250 }
 251
 252 static int
 253 init_egl(struct drm_compositor *ec, struct udev_device *device)
 254 {
 255         EGLint major, minor;
 256         const char *extensions, *filename;
 257         int fd;
 258         static const EGLint context_attribs[] = {
 259                 EGL_CONTEXT_CLIENT_VERSION, 2,
 260                 EGL_NONE
 261         };
 262
 263         filename = udev_device_get_devnode(device);
 264         fd = open(filename, O_RDWR, O_CLOEXEC);
 265         if (fd < 0) {
 266                 /* Probably permissions error */
 267                 fprintf(stderr, "couldn't open %s, skipping\n",
 268                         udev_device_get_devnode(device));
 269                 return -1;
 270         }
 271
 272         ec->drm.fd = fd;
 273         ec->base.display = eglGetDisplay(FD_TO_EGL_NATIVE_DPY(ec->drm.fd));
 274         if (ec->base.display == NULL) {
 275                 fprintf(stderr, "failed to create display\n");
 276                 return -1;
 277         }
 278
 279         if (!eglInitialize(ec->base.display, &major, &minor)) {
 280                 fprintf(stderr, "failed to initialize display\n");
 281                 return -1;
 282         }
 283
 284         extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
 285         if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
 286                 fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 287                 return -1;
 288         }
 289
 290         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 291                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 292                 return -1;
 293         }
 294
 295         ec->base.context = eglCreateContext(ec->base.display, NULL,
 296                                             EGL_NO_CONTEXT, context_attribs);
 297         if (ec->base.context == NULL) {
 298                 fprintf(stderr, "failed to create context\n");
 299                 return -1;
 300         }
 301
 302         if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
 303                             EGL_NO_SURFACE, ec->base.context)) {
 304                 fprintf(stderr, "failed to make context current\n");
 305                 return -1;
 306         }
 307
 308         return 0;
 309 }
 310
 311 static drmModeModeInfo builtin_1024x768 = {
 312         63500,                  /* clock */
 313         1024, 1072, 1176, 1328, 0,
 314         768, 771, 775, 798, 0,
 315         59920,
 316         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 317         0,
 318         "1024x768"
 319 };
 320
 321 static int
 322 create_output_for_connector(struct drm_compositor *ec,
 323                             drmModeRes *resources,
 324                             drmModeConnector *connector,
 325                             int x, int y)
 326 {
 327         struct drm_output *output;
 328         drmModeEncoder *encoder;
 329         drmModeModeInfo *mode;
 330         int i, ret;
 331         EGLint handle, stride, attribs[] = {
 332                 EGL_WIDTH,              0,
 333                 EGL_HEIGHT,             0,
 334                 EGL_DRM_BUFFER_FORMAT_MESA,     EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 335                 EGL_DRM_BUFFER_USE_MESA,        EGL_DRM_BUFFER_USE_SCANOUT_MESA,
 336                 EGL_NONE
 337         };
 338
 339         output = malloc(sizeof *output);
 340         if (output == NULL)
 341                 return -1;
 342
 343         if (connector->count_modes > 0)
 344                 mode = &connector->modes[0];
 345         else
 346                 mode = &builtin_1024x768;
 347
 348         encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
 349         if (encoder == NULL) {
 350                 fprintf(stderr, "No encoder for connector.\n");
 351                 return -1;
 352         }
 353
 354         for (i = 0; i < resources->count_crtcs; i++) {
 355                 if (encoder->possible_crtcs & (1 << i) &&
 356                     !(ec->crtc_allocator & (1 << resources->crtcs[i])))
 357                         break;
 358         }
 359         if (i == resources->count_crtcs) {
 360                 fprintf(stderr, "No usable crtc for encoder.\n");
 361                 return -1;
 362         }
 363
 364         memset(output, 0, sizeof *output);
 365         wlsc_output_init(&output->base, &ec->base, x, y,
 366                          mode->hdisplay, mode->vdisplay, 0);
 367
 368         output->crtc_id = resources->crtcs[i];
 369         ec->crtc_allocator |= (1 << output->crtc_id);
 370
 371         output->connector_id = connector->connector_id;
 372         ec->connector_allocator |= (1 << output->connector_id);
 373         output->mode = *mode;
 374
 375         drmModeFreeEncoder(encoder);
 376
 377         glGenRenderbuffers(2, output->rbo);
 378         for (i = 0; i < 2; i++) {
 379                 glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
 380
 381                 attribs[1] = output->base.width;
 382                 attribs[3] = output->base.height;
 383                 output->image[i] =
 384                         ec->create_drm_image(ec->base.display, attribs);
 385                 ec->base.image_target_renderbuffer_storage(GL_RENDERBUFFER,
 386                                                            output->image[i]);
 387                 ec->export_drm_image(ec->base.display, output->image[i],
 388                                      NULL, &handle, &stride);
 389
 390                 ret = drmModeAddFB(ec->drm.fd,
 391                                    output->base.width, output->base.height,
 392                                    32, 32, stride, handle, &output->fb_id[i]);
 393                 if (ret) {
 394                         fprintf(stderr, "failed to add fb %d: %m\n", i);
 395                         return -1;
 396                 }
 397         }
 398
 399         output->current = 0;
 400         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 401                                   GL_COLOR_ATTACHMENT0,
 402                                   GL_RENDERBUFFER,
 403                                   output->rbo[output->current]);
 404         ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
 405                              output->fb_id[output->current ^ 1], 0, 0,
 406                              &output->connector_id, 1, &output->mode);
 407         if (ret) {
 408                 fprintf(stderr, "failed to set mode: %m\n");
 409                 return -1;
 410         }
 411
 412         output->scanout_surface = NULL;
 413         output->base.prepare_render = drm_output_prepare_render;
 414         output->base.present = drm_output_present;
 415         output->base.prepare_scanout_surface =
 416                 drm_output_prepare_scanout_surface;
 417         output->base.set_hardware_cursor = drm_output_set_cursor;
 418
 419         wl_list_insert(ec->base.output_list.prev, &output->base.link);
 420
 421         return 0;
 422 }
 423
 424 static int
 425 create_outputs(struct drm_compositor *ec, int option_connector)
 426 {
 427         drmModeConnector *connector;
 428         drmModeRes *resources;
 429         int i;
 430         int x = 0, y = 0;
 431
 432         resources = drmModeGetResources(ec->drm.fd);
 433         if (!resources) {
 434                 fprintf(stderr, "drmModeGetResources failed\n");
 435                 return -1;
 436         }
 437
 438         for (i = 0; i < resources->count_connectors; i++) {
 439                 connector = drmModeGetConnector(ec->drm.fd, resources->connectors[i]);
 440                 if (connector == NULL)
 441                         continue;
 442
 443                 if (connector->connection == DRM_MODE_CONNECTED &&
 444                     (option_connector == 0 ||
 445                      connector->connector_id == option_connector))
 446                         if (create_output_for_connector(ec, resources,
 447                                                         connector, x, y) < 0)
 448                                 return -1;
 449
 450                 x += container_of(ec->base.output_list.prev, struct wlsc_output,
 451                                   link)->width;
 452
 453                 drmModeFreeConnector(connector);
 454         }
 455
 456         if (wl_list_empty(&ec->base.output_list)) {
 457                 fprintf(stderr, "No currently active connector found.\n");
 458                 return -1;
 459         }
 460
 461         drmModeFreeResources(resources);
 462
 463         return 0;
 464 }
 465
 466 static int
 467 destroy_output(struct drm_output *output)
 468 {
 469         struct drm_compositor *ec =
 470                 (struct drm_compositor *) output->base.compositor;
 471         int i;
 472
 473         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 474                                   GL_COLOR_ATTACHMENT0,
 475                                   GL_RENDERBUFFER,
 476                                   0);
 477
 478         glBindRenderbuffer(GL_RENDERBUFFER, 0);
 479         glDeleteRenderbuffers(2, output->rbo);
 480
 481         for (i = 0; i < 2; i++) {
 482                 ec->base.destroy_image(ec->base.display, output->image[i]);
 483                 drmModeRmFB(ec->drm.fd, output->fb_id[i]);
 484         }
 485
 486         ec->crtc_allocator &= ~(1 << output->crtc_id);
 487         ec->connector_allocator &= ~(1 << output->connector_id);
 488
 489         wlsc_output_destroy(&output->base);
 490         wl_list_remove(&output->base.link);
 491
 492         free(output);
 493
 494         return 0;
 495 }
 496
 497 static void
 498 update_outputs(struct drm_compositor *ec)
 499 {
 500         drmModeConnector *connector;
 501         drmModeRes *resources;
 502         struct drm_output *output, *next;
 503         int x = 0, y = 0;
 504         int x_offset = 0, y_offset = 0;
 505         uint32_t connected = 0, disconnects = 0;
 506         int i;
 507
 508         resources = drmModeGetResources(ec->drm.fd);
 509         if (!resources) {
 510                 fprintf(stderr, "drmModeGetResources failed\n");
 511                 return;
 512         }
 513
 514         /* collect new connects */
 515         for (i = 0; i < resources->count_connectors; i++) {
 516                 connector =
 517                         drmModeGetConnector(ec->drm.fd,
 518                                             resources->connectors[i]);
 519                 if (connector == NULL ||
 520                     connector->connection != DRM_MODE_CONNECTED)
 521                         continue;
 522
 523                 connected |= (1 << connector->connector_id);
 524
 525                 if (!(ec->connector_allocator & (1 << connector->connector_id))) {
 526                         struct wlsc_output *last_output =
 527                                 container_of(ec->base.output_list.prev,
 528                                              struct wlsc_output, link);
 529
 530                         /* XXX: not yet needed, we die with 0 outputs */
 531                         if (!wl_list_empty(&ec->base.output_list))
 532                                 x = last_output->x + last_output->width;
 533                         else
 534                                 x = 0;
 535                         y = 0;
 536                         create_output_for_connector(ec, resources,
 537                                                     connector, x, y);
 538                         printf("connector %d connected\n",
 539                                connector->connector_id);
 540
 541                 }
 542                 drmModeFreeConnector(connector);
 543         }
 544         drmModeFreeResources(resources);
 545
 546         disconnects = ec->connector_allocator & ~connected;
 547         if (disconnects) {
 548                 wl_list_for_each_safe(output, next, &ec->base.output_list,
 549                                       base.link) {
 550                         if (x_offset != 0 || y_offset != 0) {
 551                                 wlsc_output_move(&output->base,
 552                                                  output->base.x - x_offset,
 553                                                  output->base.y - y_offset);
 554                         }
 555
 556                         if (disconnects & (1 << output->connector_id)) {
 557                                 disconnects &= ~(1 << output->connector_id);
 558                                 printf("connector %d disconnected\n",
 559                                        output->connector_id);
 560                                 x_offset += output->base.width;
 561                                 destroy_output(output);
 562                         }
 563                 }
 564         }
 565
 566         /* FIXME: handle zero outputs, without terminating */
 567         if (ec->connector_allocator == 0)
 568                 wl_display_terminate(ec->base.wl_display);
 569 }
 570
 571 static int
 572 udev_event_is_hotplug(struct udev_device *device)
 573 {
 574         struct udev_list_entry *list, *hotplug_entry;
 575
 576         list = udev_device_get_properties_list_entry(device);
 577
 578         hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
 579         if (hotplug_entry == NULL)
 580                 return 0;
 581
 582         return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
 583 }
 584
 585 static int
 586 udev_drm_event(int fd, uint32_t mask, void *data)
 587 {
 588         struct drm_compositor *ec = data;
 589         struct udev_device *event;
 590
 591         event = udev_monitor_receive_device(ec->udev_monitor);
 592
 593         if (udev_event_is_hotplug(event))
 594                 update_outputs(ec);
 595
 596         udev_device_unref(event);
 597
 598         return 1;
 599 }
 600
 601 static EGLImageKHR
 602 drm_compositor_create_cursor_image(struct wlsc_compositor *ec,
 603                                    int32_t width, int32_t height)
 604 {
 605         static const EGLint image_attribs[] = {
 606                 EGL_WIDTH, 64,
 607                 EGL_HEIGHT, 64,
 608                 EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 609                 EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_CURSOR_MESA,
 610                 EGL_NONE
 611         };
 612         struct drm_compositor *c = (struct drm_compositor *) ec;
 613
 614         if (width > 64 || height > 64)
 615                 return EGL_NO_IMAGE_KHR;
 616
 617         return c->create_drm_image(ec->display, image_attribs);
 618 }
 619
 620 static void
 621 drm_destroy(struct wlsc_compositor *ec)
 622 {
 623         struct drm_compositor *d = (struct drm_compositor *) ec;
 624
 625         tty_destroy(d->tty);
 626
 627         free(d);
 628 }
 629
 630 static void
 631 vt_func(struct wlsc_compositor *compositor, int event)
 632 {
 633         struct drm_compositor *ec = (struct drm_compositor *) compositor;
 634         struct wlsc_output *output;
 635
 636         switch (event) {
 637         case TTY_ENTER_VT:
 638                 compositor->focus = 1;
 639                 drmSetMaster(ec->drm.fd);
 640                 compositor->state = WLSC_COMPOSITOR_ACTIVE;
 641                 wlsc_compositor_damage_all(compositor);
 642                 break;
 643         case TTY_LEAVE_VT:
 644                 compositor->focus = 0;
 645                 compositor->state = WLSC_COMPOSITOR_SLEEPING;
 646                 drmDropMaster(ec->drm.fd);
 647
 648                 wl_list_for_each(output, &ec->base.output_list, link)
 649                         drm_output_set_cursor(output, NULL);
 650
 651                 break;
 652         };
 653 }
 654
 655 static struct wlsc_compositor *
 656 drm_compositor_create(struct wl_display *display, int connector)
 657 {
 658         struct drm_compositor *ec;
 659         struct udev_enumerate *e;
 660         struct udev_list_entry *entry;
 661         struct udev_device *device;
 662         const char *path;
 663         struct wl_event_loop *loop;
 664
 665         ec = malloc(sizeof *ec);
 666         if (ec == NULL)
 667                 return NULL;
 668
 669         memset(ec, 0, sizeof *ec);
 670         ec->udev = udev_new();
 671         if (ec->udev == NULL) {
 672                 fprintf(stderr, "failed to initialize udev context\n");
 673                 return NULL;
 674         }
 675
 676         e = udev_enumerate_new(ec->udev);
 677         udev_enumerate_add_match_subsystem(e, "drm");
 678         udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
 679         udev_enumerate_scan_devices(e);
 680         device = NULL;
 681         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 682                 path = udev_list_entry_get_name(entry);
 683                 device = udev_device_new_from_syspath(ec->udev, path);
 684                 break;
 685         }
 686         udev_enumerate_unref(e);
 687
 688         if (device == NULL) {
 689                 fprintf(stderr, "no drm device found\n");
 690                 return NULL;
 691         }
 692
 693         ec->base.wl_display = display;
 694         if (init_egl(ec, device) < 0) {
 695                 fprintf(stderr, "failed to initialize egl\n");
 696                 return NULL;
 697         }
 698
 699         ec->base.destroy = drm_destroy;
 700         ec->base.create_cursor_image = drm_compositor_create_cursor_image;
 701
 702         ec->base.focus = 1;
 703
 704         glGenFramebuffers(1, &ec->base.fbo);
 705         glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
 706
 707         ec->create_drm_image =
 708                 (void *) eglGetProcAddress("eglCreateDRMImageMESA");
 709         ec->export_drm_image =
 710                 (void *) eglGetProcAddress("eglExportDRMImageMESA");
 711
 712         /* Can't init base class until we have a current egl context */
 713         if (wlsc_compositor_init(&ec->base, display) < 0)
 714                 return NULL;
 715
 716         if (create_outputs(ec, connector) < 0) {
 717                 fprintf(stderr, "failed to create output for %s\n", path);
 718                 return NULL;
 719         }
 720
 721         evdev_input_add_devices(&ec->base, ec->udev);
 722
 723         loop = wl_display_get_event_loop(ec->base.wl_display);
 724         ec->drm_source =
 725                 wl_event_loop_add_fd(loop, ec->drm.fd,
 726                                      WL_EVENT_READABLE, on_drm_input, ec);
 727         ec->tty = tty_create(&ec->base, vt_func);
 728
 729         ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
 730         if (ec->udev_monitor == NULL) {
 731                 fprintf(stderr, "failed to intialize udev monitor\n");
 732                 return NULL;
 733         }
 734         udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
 735                                                         "drm", NULL);
 736         ec->udev_drm_source =
 737                 wl_event_loop_add_fd(loop, udev_monitor_get_fd(ec->udev_monitor),
 738                                      WL_EVENT_READABLE, udev_drm_event, ec);
 739
 740         if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
 741                 fprintf(stderr, "failed to enable udev-monitor receiving\n");
 742                 return NULL;
 743         }
 744
 745         return &ec->base;
 746 }
 747
 748 struct wlsc_compositor *
 749 backend_init(struct wl_display *display, char *options);
 750
 751 WL_EXPORT struct wlsc_compositor *
 752 backend_init(struct wl_display *display, char *options)
 753 {
 754         int connector = 0, i;
 755         char *p, *value;
 756
 757         static char * const tokens[] = { "connector", NULL };
 758
 759         p = options;
 760         while (i = getsubopt(&p, tokens, &value), i != -1) {
 761                 switch (i) {
 762                 case 0:
 763                         connector = strtol(value, NULL, 0);
 764                         break;
 765                 }
 766         }
 767
 768         return drm_compositor_create(display, connector);
 769 }