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 <gbm.h>
  31
  32 #include "compositor.h"
  33
  34 struct drm_compositor {
  35         struct wlsc_compositor base;
  36
  37         struct udev *udev;
  38         struct wl_event_source *drm_source;
  39
  40         struct udev_monitor *udev_monitor;
  41         struct wl_event_source *udev_drm_source;
  42
  43         struct {
  44                 int fd;
  45         } drm;
  46         struct gbm_device *gbm;
  47         uint32_t crtc_allocator;
  48         uint32_t connector_allocator;
  49         struct tty *tty;
  50 };
  51
  52 struct drm_mode {
  53         struct wlsc_mode base;
  54         drmModeModeInfo mode_info;
  55 };
  56
  57 struct drm_output {
  58         struct wlsc_output   base;
  59
  60         uint32_t crtc_id;
  61         uint32_t connector_id;
  62         GLuint rbo[2];
  63         uint32_t fb_id[2];
  64         EGLImageKHR image[2];
  65         struct gbm_bo *bo[2];
  66         uint32_t current;
  67
  68         struct wlsc_surface *scanout_surface;
  69
  70         uint32_t fs_surf_fb_id;
  71         uint32_t pending_fs_surf_fb_id;
  72 };
  73
  74 static int
  75 drm_output_prepare_render(struct wlsc_output *output_base)
  76 {
  77         struct drm_output *output = (struct drm_output *) output_base;
  78
  79         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
  80                                   GL_COLOR_ATTACHMENT0,
  81                                   GL_RENDERBUFFER,
  82                                   output->rbo[output->current]);
  83
  84         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
  85                 return -1;
  86
  87         return 0;
  88 }
  89
  90 static int
  91 drm_output_present(struct wlsc_output *output_base)
  92 {
  93         struct drm_output *output = (struct drm_output *) output_base;
  94         struct drm_compositor *c =
  95                 (struct drm_compositor *) output->base.compositor;
  96         uint32_t fb_id = 0;
  97
  98         if (drm_output_prepare_render(&output->base))
  99                 return -1;
 100         glFlush();
 101
 102         output->current ^= 1;
 103
 104         if (output->scanout_surface != NULL) {
 105                 output->scanout_surface = NULL;
 106                 fb_id = output->fs_surf_fb_id;
 107         } else {
 108                 fb_id = output->fb_id[output->current ^ 1];
 109         }
 110
 111         drmModePageFlip(c->drm.fd, output->crtc_id,
 112                         fb_id,
 113                         DRM_MODE_PAGE_FLIP_EVENT, output);
 114
 115         return 0;
 116 }
 117
 118 static void
 119 page_flip_handler(int fd, unsigned int frame,
 120                   unsigned int sec, unsigned int usec, void *data)
 121 {
 122         struct drm_output *output = (struct drm_output *) data;
 123         struct drm_compositor *c =
 124                 (struct drm_compositor *) output->base.compositor;
 125         uint32_t msecs;
 126
 127         if (output->pending_fs_surf_fb_id) {
 128                 drmModeRmFB(c->drm.fd, output->pending_fs_surf_fb_id);
 129                 output->pending_fs_surf_fb_id = 0;
 130         }
 131
 132         if (output->fs_surf_fb_id) {
 133                 output->pending_fs_surf_fb_id = output->fs_surf_fb_id;
 134                 output->fs_surf_fb_id = 0;
 135         }
 136
 137         msecs = sec * 1000 + usec / 1000;
 138         wlsc_output_finish_frame(&output->base, msecs);
 139 }
 140
 141 static int
 142 drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
 143                                    struct wlsc_surface *es)
 144 {
 145         struct drm_output *output = (struct drm_output *) output_base;
 146         struct drm_compositor *c =
 147                 (struct drm_compositor *) output->base.compositor;
 148         EGLint handle, stride;
 149         int ret;
 150         uint32_t fb_id = 0;
 151         struct gbm_bo *bo;
 152
 153         if (es->x != output->base.x ||
 154             es->y != output->base.y ||
 155             es->width != output->base.current->width ||
 156             es->height != output->base.current->height ||
 157             es->image == EGL_NO_IMAGE_KHR)
 158                 return -1;
 159
 160         bo = gbm_bo_create_from_egl_image(c->gbm,
 161                                           c->base.display, es->image,
 162                                           es->width, es->height,
 163                                           GBM_BO_USE_SCANOUT);
 164
 165         handle = gbm_bo_get_handle(bo).s32;
 166         stride = gbm_bo_get_pitch(bo);
 167
 168         gbm_bo_destroy(bo);
 169
 170         if (handle == 0)
 171                 return -1;
 172
 173         ret = drmModeAddFB(c->drm.fd,
 174                            output->base.current->width,
 175                            output->base.current->height,
 176                            32, 32, stride, handle, &fb_id);
 177
 178         if (ret)
 179                 return -1;
 180
 181         output->fs_surf_fb_id = fb_id;
 182         output->scanout_surface = es;
 183
 184         return 0;
 185 }
 186
 187 static int
 188 drm_output_set_cursor(struct wlsc_output *output_base,
 189                       struct wlsc_input_device *eid)
 190 {
 191         struct drm_output *output = (struct drm_output *) output_base;
 192         struct drm_compositor *c =
 193                 (struct drm_compositor *) output->base.compositor;
 194         EGLint handle, stride;
 195         int ret = -1;
 196         pixman_region32_t cursor_region;
 197         struct gbm_bo *bo;
 198
 199         if (eid == NULL) {
 200                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 201                 return 0;
 202         }
 203
 204         pixman_region32_init_rect(&cursor_region,
 205                                   eid->sprite->x, eid->sprite->y,
 206                                   eid->sprite->width, eid->sprite->height);
 207
 208         pixman_region32_intersect_rect(&cursor_region, &cursor_region,
 209                                        output->base.x, output->base.y,
 210                                        output->base.current->width,
 211                                        output->base.current->height);
 212
 213         if (!pixman_region32_not_empty(&cursor_region))
 214                 goto out;
 215
 216         if (eid->sprite->image == EGL_NO_IMAGE_KHR)
 217                 goto out;
 218
 219         if (eid->sprite->width > 64 || eid->sprite->height > 64)
 220                 goto out;
 221
 222         bo = gbm_bo_create_from_egl_image(c->gbm,
 223                                           c->base.display,
 224                                           eid->sprite->image, 64, 64,
 225                                           GBM_BO_USE_CURSOR_64X64);
 226
 227         handle = gbm_bo_get_handle(bo).s32;
 228         stride = gbm_bo_get_pitch(bo);
 229
 230         gbm_bo_destroy(bo);
 231
 232         if (stride != 64 * 4) {
 233                 fprintf(stderr, "info: cursor stride is != 64\n");
 234                 goto out;
 235         }
 236
 237         ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
 238         if (ret) {
 239                 fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
 240                 goto out;
 241         }
 242
 243         ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
 244                                 eid->sprite->x - output->base.x,
 245                                 eid->sprite->y - output->base.y);
 246         if (ret) {
 247                 fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
 248                 goto out;
 249         }
 250
 251 out:
 252         pixman_region32_fini(&cursor_region);
 253         if (ret)
 254                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 255         return ret;
 256 }
 257
 258 static int
 259 on_drm_input(int fd, uint32_t mask, void *data)
 260 {
 261         drmEventContext evctx;
 262
 263         memset(&evctx, 0, sizeof evctx);
 264         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 265         evctx.page_flip_handler = page_flip_handler;
 266         drmHandleEvent(fd, &evctx);
 267
 268         return 1;
 269 }
 270
 271 static int
 272 init_egl(struct drm_compositor *ec, struct udev_device *device)
 273 {
 274         EGLint major, minor;
 275         const char *extensions, *filename;
 276         int fd;
 277         static const EGLint context_attribs[] = {
 278                 EGL_CONTEXT_CLIENT_VERSION, 2,
 279                 EGL_NONE
 280         };
 281
 282         filename = udev_device_get_devnode(device);
 283         fd = open(filename, O_RDWR, O_CLOEXEC);
 284         if (fd < 0) {
 285                 /* Probably permissions error */
 286                 fprintf(stderr, "couldn't open %s, skipping\n",
 287                         udev_device_get_devnode(device));
 288                 return -1;
 289         }
 290
 291         setenv("EGL_PLATFORM", "drm", 1);
 292         ec->drm.fd = fd;
 293         ec->gbm = gbm_create_device(ec->drm.fd);
 294         ec->base.display = eglGetDisplay(ec->gbm);
 295         if (ec->base.display == NULL) {
 296                 fprintf(stderr, "failed to create display\n");
 297                 return -1;
 298         }
 299
 300         if (!eglInitialize(ec->base.display, &major, &minor)) {
 301                 fprintf(stderr, "failed to initialize display\n");
 302                 return -1;
 303         }
 304
 305         extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
 306         if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
 307                 fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 308                 return -1;
 309         }
 310
 311         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 312                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 313                 return -1;
 314         }
 315
 316         ec->base.context = eglCreateContext(ec->base.display, NULL,
 317                                             EGL_NO_CONTEXT, context_attribs);
 318         if (ec->base.context == NULL) {
 319                 fprintf(stderr, "failed to create context\n");
 320                 return -1;
 321         }
 322
 323         if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
 324                             EGL_NO_SURFACE, ec->base.context)) {
 325                 fprintf(stderr, "failed to make context current\n");
 326                 return -1;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static drmModeModeInfo builtin_1024x768 = {
 333         63500,                  /* clock */
 334         1024, 1072, 1176, 1328, 0,
 335         768, 771, 775, 798, 0,
 336         59920,
 337         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 338         0,
 339         "1024x768"
 340 };
 341
 342
 343 static int
 344 drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
 345 {
 346         struct drm_mode *mode;
 347
 348         mode = malloc(sizeof *mode);
 349         if (mode == NULL)
 350                 return -1;
 351
 352         mode->base.flags = 0;
 353         mode->base.width = info->hdisplay;
 354         mode->base.height = info->vdisplay;
 355         mode->base.refresh = info->vrefresh;
 356         mode->mode_info = *info;
 357         wl_list_insert(output->base.mode_list.prev, &mode->base.link);
 358
 359         return 0;
 360 }
 361
 362 static int
 363 drm_subpixel_to_wayland(int drm_value)
 364 {
 365         switch (drm_value) {
 366         default:
 367         case DRM_MODE_SUBPIXEL_UNKNOWN:
 368                 return WL_OUTPUT_SUBPIXEL_UNKNOWN;
 369         case DRM_MODE_SUBPIXEL_NONE:
 370                 return WL_OUTPUT_SUBPIXEL_NONE;
 371         case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
 372                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
 373         case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
 374                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
 375         case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
 376                 return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
 377         case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
 378                 return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
 379         }
 380 }
 381
 382 static int
 383 create_output_for_connector(struct drm_compositor *ec,
 384                             drmModeRes *resources,
 385                             drmModeConnector *connector,
 386                             int x, int y)
 387 {
 388         struct drm_output *output;
 389         struct drm_mode *drm_mode;
 390         drmModeEncoder *encoder;
 391         int i, ret;
 392         unsigned handle, stride;
 393
 394         encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
 395         if (encoder == NULL) {
 396                 fprintf(stderr, "No encoder for connector.\n");
 397                 return -1;
 398         }
 399
 400         for (i = 0; i < resources->count_crtcs; i++) {
 401                 if (encoder->possible_crtcs & (1 << i) &&
 402                     !(ec->crtc_allocator & (1 << resources->crtcs[i])))
 403                         break;
 404         }
 405         if (i == resources->count_crtcs) {
 406                 fprintf(stderr, "No usable crtc for encoder.\n");
 407                 return -1;
 408         }
 409
 410         output = malloc(sizeof *output);
 411         if (output == NULL)
 412                 return -1;
 413
 414         memset(output, 0, sizeof *output);
 415         output->base.subpixel = drm_subpixel_to_wayland(connector->subpixel);
 416         output->base.make = "unknown";
 417         output->base.model = "unknown";
 418         wl_list_init(&output->base.mode_list);
 419
 420         output->crtc_id = resources->crtcs[i];
 421         ec->crtc_allocator |= (1 << output->crtc_id);
 422         output->connector_id = connector->connector_id;
 423         ec->connector_allocator |= (1 << output->connector_id);
 424
 425         for (i = 0; i < connector->count_modes; i++)
 426                 drm_output_add_mode(output, &connector->modes[i]);
 427         if (connector->count_modes == 0)
 428                 drm_output_add_mode(output, &builtin_1024x768);
 429
 430         drm_mode = container_of(output->base.mode_list.next,
 431                                 struct drm_mode, base.link);
 432         output->base.current = &drm_mode->base;
 433         drm_mode->base.flags =
 434                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 435
 436         wlsc_output_init(&output->base, &ec->base, x, y,
 437                          connector->mmWidth, connector->mmHeight, 0);
 438
 439         wl_list_insert(ec->base.output_list.prev, &output->base.link);
 440
 441         drmModeFreeEncoder(encoder);
 442
 443         glGenRenderbuffers(2, output->rbo);
 444         for (i = 0; i < 2; i++) {
 445                 glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
 446
 447                 output->bo[i] =
 448                         gbm_bo_create(ec->gbm,
 449                                       output->base.current->width,
 450                                       output->base.current->height,
 451                                       GBM_BO_FORMAT_XRGB8888,
 452                                       GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
 453                 output->image[i] = ec->base.create_image(ec->base.display,
 454                                                          NULL,
 455                                                          EGL_NATIVE_PIXMAP_KHR,
 456                                                          output->bo[i], NULL);
 457
 458
 459                 ec->base.image_target_renderbuffer_storage(GL_RENDERBUFFER,
 460                                                            output->image[i]);
 461                 stride = gbm_bo_get_pitch(output->bo[i]);
 462                 handle = gbm_bo_get_handle(output->bo[i]).u32;
 463
 464                 ret = drmModeAddFB(ec->drm.fd,
 465                                    output->base.current->width,
 466                                    output->base.current->height,
 467                                    32, 32, stride, handle, &output->fb_id[i]);
 468                 if (ret) {
 469                         fprintf(stderr, "failed to add fb %d: %m\n", i);
 470                         return -1;
 471                 }
 472         }
 473
 474         output->current = 0;
 475         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 476                                   GL_COLOR_ATTACHMENT0,
 477                                   GL_RENDERBUFFER,
 478                                   output->rbo[output->current]);
 479         ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
 480                              output->fb_id[output->current ^ 1], 0, 0,
 481                              &output->connector_id, 1,
 482                              &drm_mode->mode_info);
 483         if (ret) {
 484                 fprintf(stderr, "failed to set mode: %m\n");
 485                 return -1;
 486         }
 487
 488         output->scanout_surface = NULL;
 489         output->base.prepare_render = drm_output_prepare_render;
 490         output->base.present = drm_output_present;
 491         output->base.prepare_scanout_surface =
 492                 drm_output_prepare_scanout_surface;
 493         output->base.set_hardware_cursor = drm_output_set_cursor;
 494
 495         return 0;
 496 }
 497
 498 static int
 499 create_outputs(struct drm_compositor *ec, int option_connector)
 500 {
 501         drmModeConnector *connector;
 502         drmModeRes *resources;
 503         int i;
 504         int x = 0, y = 0;
 505
 506         resources = drmModeGetResources(ec->drm.fd);
 507         if (!resources) {
 508                 fprintf(stderr, "drmModeGetResources failed\n");
 509                 return -1;
 510         }
 511
 512         for (i = 0; i < resources->count_connectors; i++) {
 513                 connector = drmModeGetConnector(ec->drm.fd, resources->connectors[i]);
 514                 if (connector == NULL)
 515                         continue;
 516
 517                 if (connector->connection == DRM_MODE_CONNECTED &&
 518                     (option_connector == 0 ||
 519                      connector->connector_id == option_connector)) {
 520                         if (create_output_for_connector(ec, resources,
 521                                                         connector, x, y) < 0)
 522                                 return -1;
 523
 524                         x += container_of(ec->base.output_list.prev,
 525                                           struct wlsc_output,
 526                                           link)->current->width;
 527                 }
 528
 529                 drmModeFreeConnector(connector);
 530         }
 531
 532         if (wl_list_empty(&ec->base.output_list)) {
 533                 fprintf(stderr, "No currently active connector found.\n");
 534                 return -1;
 535         }
 536
 537         drmModeFreeResources(resources);
 538
 539         return 0;
 540 }
 541
 542 static int
 543 destroy_output(struct drm_output *output)
 544 {
 545         struct drm_compositor *ec =
 546                 (struct drm_compositor *) output->base.compositor;
 547         int i;
 548
 549         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 550                                   GL_COLOR_ATTACHMENT0,
 551                                   GL_RENDERBUFFER,
 552                                   0);
 553
 554         glBindRenderbuffer(GL_RENDERBUFFER, 0);
 555         glDeleteRenderbuffers(2, output->rbo);
 556
 557         for (i = 0; i < 2; i++) {
 558                 ec->base.destroy_image(ec->base.display, output->image[i]);
 559                 drmModeRmFB(ec->drm.fd, output->fb_id[i]);
 560         }
 561
 562         ec->crtc_allocator &= ~(1 << output->crtc_id);
 563         ec->connector_allocator &= ~(1 << output->connector_id);
 564
 565         wlsc_output_destroy(&output->base);
 566         wl_list_remove(&output->base.link);
 567
 568         free(output);
 569
 570         return 0;
 571 }
 572
 573 static void
 574 update_outputs(struct drm_compositor *ec)
 575 {
 576         drmModeConnector *connector;
 577         drmModeRes *resources;
 578         struct drm_output *output, *next;
 579         int x = 0, y = 0;
 580         int x_offset = 0, y_offset = 0;
 581         uint32_t connected = 0, disconnects = 0;
 582         int i;
 583
 584         resources = drmModeGetResources(ec->drm.fd);
 585         if (!resources) {
 586                 fprintf(stderr, "drmModeGetResources failed\n");
 587                 return;
 588         }
 589
 590         /* collect new connects */
 591         for (i = 0; i < resources->count_connectors; i++) {
 592                 connector =
 593                         drmModeGetConnector(ec->drm.fd,
 594                                             resources->connectors[i]);
 595                 if (connector == NULL ||
 596                     connector->connection != DRM_MODE_CONNECTED)
 597                         continue;
 598
 599                 connected |= (1 << connector->connector_id);
 600
 601                 if (!(ec->connector_allocator & (1 << connector->connector_id))) {
 602                         struct wlsc_output *last_output =
 603                                 container_of(ec->base.output_list.prev,
 604                                              struct wlsc_output, link);
 605
 606                         /* XXX: not yet needed, we die with 0 outputs */
 607                         if (!wl_list_empty(&ec->base.output_list))
 608                                 x = last_output->x + last_output->current->width;
 609                         else
 610                                 x = 0;
 611                         y = 0;
 612                         create_output_for_connector(ec, resources,
 613                                                     connector, x, y);
 614                         printf("connector %d connected\n",
 615                                connector->connector_id);
 616
 617                 }
 618                 drmModeFreeConnector(connector);
 619         }
 620         drmModeFreeResources(resources);
 621
 622         disconnects = ec->connector_allocator & ~connected;
 623         if (disconnects) {
 624                 wl_list_for_each_safe(output, next, &ec->base.output_list,
 625                                       base.link) {
 626                         if (x_offset != 0 || y_offset != 0) {
 627                                 wlsc_output_move(&output->base,
 628                                                  output->base.x - x_offset,
 629                                                  output->base.y - y_offset);
 630                         }
 631
 632                         if (disconnects & (1 << output->connector_id)) {
 633                                 disconnects &= ~(1 << output->connector_id);
 634                                 printf("connector %d disconnected\n",
 635                                        output->connector_id);
 636                                 x_offset += output->base.current->width;
 637                                 destroy_output(output);
 638                         }
 639                 }
 640         }
 641
 642         /* FIXME: handle zero outputs, without terminating */
 643         if (ec->connector_allocator == 0)
 644                 wl_display_terminate(ec->base.wl_display);
 645 }
 646
 647 static int
 648 udev_event_is_hotplug(struct udev_device *device)
 649 {
 650         struct udev_list_entry *list, *hotplug_entry;
 651
 652         list = udev_device_get_properties_list_entry(device);
 653
 654         hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
 655         if (hotplug_entry == NULL)
 656                 return 0;
 657
 658         return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
 659 }
 660
 661 static int
 662 udev_drm_event(int fd, uint32_t mask, void *data)
 663 {
 664         struct drm_compositor *ec = data;
 665         struct udev_device *event;
 666
 667         event = udev_monitor_receive_device(ec->udev_monitor);
 668
 669         if (udev_event_is_hotplug(event))
 670                 update_outputs(ec);
 671
 672         udev_device_unref(event);
 673
 674         return 1;
 675 }
 676
 677 static EGLImageKHR
 678 drm_compositor_create_cursor_image(struct wlsc_compositor *ec,
 679                                    int32_t width, int32_t height)
 680 {
 681         struct drm_compositor *c = (struct drm_compositor *) ec;
 682         struct gbm_bo *bo;
 683         EGLImageKHR image;
 684
 685         if (width > 64 || height > 64)
 686                 return EGL_NO_IMAGE_KHR;
 687
 688         bo = gbm_bo_create(c->gbm,
 689                            /* width, height, */ 64, 64,
 690                            GBM_BO_FORMAT_ARGB8888,
 691                            GBM_BO_USE_CURSOR_64X64 | GBM_BO_USE_RENDERING);
 692
 693         image = ec->create_image(c->base.display, NULL,
 694                                  EGL_NATIVE_PIXMAP_KHR, bo, NULL);
 695         gbm_bo_destroy(bo);
 696
 697         return image;
 698 }
 699
 700 static void
 701 drm_destroy(struct wlsc_compositor *ec)
 702 {
 703         struct drm_compositor *d = (struct drm_compositor *) ec;
 704
 705         tty_destroy(d->tty);
 706
 707         free(d);
 708 }
 709
 710 static void
 711 vt_func(struct wlsc_compositor *compositor, int event)
 712 {
 713         struct drm_compositor *ec = (struct drm_compositor *) compositor;
 714         struct wlsc_output *output;
 715
 716         switch (event) {
 717         case TTY_ENTER_VT:
 718                 compositor->focus = 1;
 719                 drmSetMaster(ec->drm.fd);
 720                 compositor->state = WLSC_COMPOSITOR_ACTIVE;
 721                 wlsc_compositor_damage_all(compositor);
 722                 break;
 723         case TTY_LEAVE_VT:
 724                 compositor->focus = 0;
 725                 compositor->state = WLSC_COMPOSITOR_SLEEPING;
 726                 drmDropMaster(ec->drm.fd);
 727
 728                 wl_list_for_each(output, &ec->base.output_list, link)
 729                         drm_output_set_cursor(output, NULL);
 730
 731                 break;
 732         };
 733 }
 734
 735 static const char default_seat[] = "seat0";
 736
 737 static struct wlsc_compositor *
 738 drm_compositor_create(struct wl_display *display,
 739                       int connector, const char *seat)
 740 {
 741         struct drm_compositor *ec;
 742         struct udev_enumerate *e;
 743         struct udev_list_entry *entry;
 744         struct udev_device *device, *drm_device;
 745         const char *path, *device_seat;
 746         struct wl_event_loop *loop;
 747
 748         ec = malloc(sizeof *ec);
 749         if (ec == NULL)
 750                 return NULL;
 751
 752         memset(ec, 0, sizeof *ec);
 753         ec->udev = udev_new();
 754         if (ec->udev == NULL) {
 755                 fprintf(stderr, "failed to initialize udev context\n");
 756                 return NULL;
 757         }
 758
 759         e = udev_enumerate_new(ec->udev);
 760         udev_enumerate_add_match_subsystem(e, "drm");
 761
 762         udev_enumerate_scan_devices(e);
 763         drm_device = NULL;
 764         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 765                 path = udev_list_entry_get_name(entry);
 766                 device = udev_device_new_from_syspath(ec->udev, path);
 767                 device_seat =
 768                         udev_device_get_property_value(device, "ID_SEAT");
 769                 if (!device_seat)
 770                         device_seat = default_seat;
 771                 if (strcmp(device_seat, seat) == 0) {
 772                         drm_device = device;
 773                         break;
 774                 }
 775                 udev_device_unref(device);
 776         }
 777
 778         udev_enumerate_unref(e);
 779
 780         if (drm_device == NULL) {
 781                 fprintf(stderr, "no drm device found\n");
 782                 return NULL;
 783         }
 784
 785         ec->base.wl_display = display;
 786         if (init_egl(ec, drm_device) < 0) {
 787                 fprintf(stderr, "failed to initialize egl\n");
 788                 return NULL;
 789         }
 790
 791         udev_device_unref(drm_device);
 792
 793         ec->base.destroy = drm_destroy;
 794         ec->base.create_cursor_image = drm_compositor_create_cursor_image;
 795
 796         ec->base.focus = 1;
 797
 798         glGenFramebuffers(1, &ec->base.fbo);
 799         glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
 800
 801         /* Can't init base class until we have a current egl context */
 802         if (wlsc_compositor_init(&ec->base, display) < 0)
 803                 return NULL;
 804
 805         if (create_outputs(ec, connector) < 0) {
 806                 fprintf(stderr, "failed to create output for %s\n", path);
 807                 return NULL;
 808         }
 809
 810         evdev_input_add_devices(&ec->base, ec->udev, seat);
 811
 812         loop = wl_display_get_event_loop(ec->base.wl_display);
 813         ec->drm_source =
 814                 wl_event_loop_add_fd(loop, ec->drm.fd,
 815                                      WL_EVENT_READABLE, on_drm_input, ec);
 816         ec->tty = tty_create(&ec->base, vt_func);
 817
 818         ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
 819         if (ec->udev_monitor == NULL) {
 820                 fprintf(stderr, "failed to intialize udev monitor\n");
 821                 return NULL;
 822         }
 823         udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
 824                                                         "drm", NULL);
 825         ec->udev_drm_source =
 826                 wl_event_loop_add_fd(loop, udev_monitor_get_fd(ec->udev_monitor),
 827                                      WL_EVENT_READABLE, udev_drm_event, ec);
 828
 829         if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
 830                 fprintf(stderr, "failed to enable udev-monitor receiving\n");
 831                 return NULL;
 832         }
 833
 834         return &ec->base;
 835 }
 836
 837 struct wlsc_compositor *
 838 backend_init(struct wl_display *display, char *options);
 839
 840 WL_EXPORT struct wlsc_compositor *
 841 backend_init(struct wl_display *display, char *options)
 842 {
 843         int connector = 0, i;
 844         const char *seat;
 845         char *p, *value;
 846
 847         static char * const tokens[] = { "connector", "seat", NULL };
 848
 849         p = options;
 850         seat = default_seat;
 851         while (i = getsubopt(&p, tokens, &value), i != -1) {
 852                 switch (i) {
 853                 case 0:
 854                         connector = strtol(value, NULL, 0);
 855                         break;
 856                 case 1:
 857                         seat = value;
 858                         break;
 859                 }
 860         }
 861
 862         return drm_compositor_create(display, connector, seat);
 863 }