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_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         uint32_t current;
  66
  67         struct wlsc_surface *scanout_surface;
  68
  69         uint32_t fs_surf_fb_id;
  70         uint32_t pending_fs_surf_fb_id;
  71 };
  72
  73 static int
  74 drm_output_prepare_render(struct wlsc_output *output_base)
  75 {
  76         struct drm_output *output = (struct drm_output *) output_base;
  77
  78         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
  79                                   GL_COLOR_ATTACHMENT0,
  80                                   GL_RENDERBUFFER,
  81                                   output->rbo[output->current]);
  82
  83         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
  84                 return -1;
  85
  86         return 0;
  87 }
  88
  89 static int
  90 drm_output_present(struct wlsc_output *output_base)
  91 {
  92         struct drm_output *output = (struct drm_output *) output_base;
  93         struct drm_compositor *c =
  94                 (struct drm_compositor *) output->base.compositor;
  95         uint32_t fb_id = 0;
  96
  97         if (drm_output_prepare_render(&output->base))
  98                 return -1;
  99         glFlush();
 100
 101         output->current ^= 1;
 102
 103         if (output->scanout_surface != NULL) {
 104                 output->scanout_surface = NULL;
 105                 fb_id = output->fs_surf_fb_id;
 106         } else {
 107                 fb_id = output->fb_id[output->current ^ 1];
 108         }
 109
 110         drmModePageFlip(c->drm.fd, output->crtc_id,
 111                         fb_id,
 112                         DRM_MODE_PAGE_FLIP_EVENT, output);
 113
 114         return 0;
 115 }
 116
 117 static void
 118 page_flip_handler(int fd, unsigned int frame,
 119                   unsigned int sec, unsigned int usec, void *data)
 120 {
 121         struct drm_output *output = (struct drm_output *) data;
 122         struct drm_compositor *c =
 123                 (struct drm_compositor *) output->base.compositor;
 124         uint32_t msecs;
 125
 126         if (output->pending_fs_surf_fb_id) {
 127                 drmModeRmFB(c->drm.fd, output->pending_fs_surf_fb_id);
 128                 output->pending_fs_surf_fb_id = 0;
 129         }
 130
 131         if (output->fs_surf_fb_id) {
 132                 output->pending_fs_surf_fb_id = output->fs_surf_fb_id;
 133                 output->fs_surf_fb_id = 0;
 134         }
 135
 136         msecs = sec * 1000 + usec / 1000;
 137         wlsc_output_finish_frame(&output->base, msecs);
 138 }
 139
 140 static int
 141 drm_output_prepare_scanout_surface(struct wlsc_output *output_base,
 142                                    struct wlsc_surface *es)
 143 {
 144         struct drm_output *output = (struct drm_output *) output_base;
 145         struct drm_compositor *c =
 146                 (struct drm_compositor *) output->base.compositor;
 147         EGLint handle, stride;
 148         int ret;
 149         uint32_t fb_id = 0;
 150
 151         if (es->x != output->base.x ||
 152             es->y != output->base.y ||
 153             es->width != output->base.current->width ||
 154             es->height != output->base.current->height ||
 155             es->image == EGL_NO_IMAGE_KHR)
 156                 return -1;
 157
 158         c->export_drm_image(c->base.display,
 159                             es->image, NULL, &handle, &stride);
 160
 161         if (handle == 0)
 162                 return -1;
 163
 164         ret = drmModeAddFB(c->drm.fd,
 165                            output->base.current->width,
 166                            output->base.current->height,
 167                            32, 32, stride, handle, &fb_id);
 168
 169         if (ret)
 170                 return -1;
 171
 172         output->fs_surf_fb_id = fb_id;
 173         output->scanout_surface = es;
 174
 175         return 0;
 176 }
 177
 178 static int
 179 drm_output_set_cursor(struct wlsc_output *output_base,
 180                       struct wlsc_input_device *eid)
 181 {
 182         struct drm_output *output = (struct drm_output *) output_base;
 183         struct drm_compositor *c =
 184                 (struct drm_compositor *) output->base.compositor;
 185         EGLint handle, stride;
 186         int ret = -1;
 187         pixman_region32_t cursor_region;
 188
 189         if (eid == NULL) {
 190                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 191                 return 0;
 192         }
 193
 194         pixman_region32_init_rect(&cursor_region,
 195                                   eid->sprite->x, eid->sprite->y,
 196                                   eid->sprite->width, eid->sprite->height);
 197
 198         pixman_region32_intersect_rect(&cursor_region, &cursor_region,
 199                                        output->base.x, output->base.y,
 200                                        output->base.current->width,
 201                                        output->base.current->height);
 202
 203         if (!pixman_region32_not_empty(&cursor_region)) {
 204                 ret = 0;
 205                 goto out;
 206         }
 207
 208         if (eid->sprite->image == EGL_NO_IMAGE_KHR)
 209                 goto out;
 210
 211         if (eid->sprite->width > 64 || eid->sprite->height > 64)
 212                 goto out;
 213
 214         c->export_drm_image(c->base.display, eid->sprite->image,
 215                             NULL, &handle, &stride);
 216
 217         if (stride != 64 * 4) {
 218                 fprintf(stderr, "info: cursor stride is != 64\n");
 219                 goto out;
 220         }
 221
 222         ret = drmModeSetCursor(c->drm.fd, output->crtc_id, handle, 64, 64);
 223         if (ret) {
 224                 fprintf(stderr, "failed to set cursor: %s\n", strerror(-ret));
 225                 goto out;
 226         }
 227
 228         ret = drmModeMoveCursor(c->drm.fd, output->crtc_id,
 229                                 eid->sprite->x - output->base.x,
 230                                 eid->sprite->y - output->base.y);
 231         if (ret) {
 232                 fprintf(stderr, "failed to move cursor: %s\n", strerror(-ret));
 233                 goto out;
 234         }
 235
 236         printf("info: set hardware cursor\n");
 237
 238 out:
 239         pixman_region32_fini(&cursor_region);
 240         if (ret)
 241                 drmModeSetCursor(c->drm.fd, output->crtc_id, 0, 0, 0);
 242         return ret;
 243 }
 244
 245 static int
 246 on_drm_input(int fd, uint32_t mask, void *data)
 247 {
 248         drmEventContext evctx;
 249
 250         memset(&evctx, 0, sizeof evctx);
 251         evctx.version = DRM_EVENT_CONTEXT_VERSION;
 252         evctx.page_flip_handler = page_flip_handler;
 253         drmHandleEvent(fd, &evctx);
 254
 255         return 1;
 256 }
 257
 258 static int
 259 init_egl(struct drm_compositor *ec, struct udev_device *device)
 260 {
 261         EGLint major, minor;
 262         const char *extensions, *filename;
 263         int fd;
 264         static const EGLint context_attribs[] = {
 265                 EGL_CONTEXT_CLIENT_VERSION, 2,
 266                 EGL_NONE
 267         };
 268
 269         filename = udev_device_get_devnode(device);
 270         fd = open(filename, O_RDWR, O_CLOEXEC);
 271         if (fd < 0) {
 272                 /* Probably permissions error */
 273                 fprintf(stderr, "couldn't open %s, skipping\n",
 274                         udev_device_get_devnode(device));
 275                 return -1;
 276         }
 277
 278         setenv("EGL_PLATFORM", "drm", 1);
 279         ec->drm.fd = fd;
 280         ec->base.display = eglGetDisplay(FD_TO_EGL_NATIVE_DPY(ec->drm.fd));
 281         if (ec->base.display == NULL) {
 282                 fprintf(stderr, "failed to create display\n");
 283                 return -1;
 284         }
 285
 286         if (!eglInitialize(ec->base.display, &major, &minor)) {
 287                 fprintf(stderr, "failed to initialize display\n");
 288                 return -1;
 289         }
 290
 291         extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
 292         if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
 293                 fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 294                 return -1;
 295         }
 296
 297         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 298                 fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
 299                 return -1;
 300         }
 301
 302         ec->base.context = eglCreateContext(ec->base.display, NULL,
 303                                             EGL_NO_CONTEXT, context_attribs);
 304         if (ec->base.context == NULL) {
 305                 fprintf(stderr, "failed to create context\n");
 306                 return -1;
 307         }
 308
 309         if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
 310                             EGL_NO_SURFACE, ec->base.context)) {
 311                 fprintf(stderr, "failed to make context current\n");
 312                 return -1;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static drmModeModeInfo builtin_1024x768 = {
 319         63500,                  /* clock */
 320         1024, 1072, 1176, 1328, 0,
 321         768, 771, 775, 798, 0,
 322         59920,
 323         DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 324         0,
 325         "1024x768"
 326 };
 327
 328
 329 static int
 330 drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
 331 {
 332         struct drm_mode *mode;
 333
 334         mode = malloc(sizeof *mode);
 335         if (mode == NULL)
 336                 return -1;
 337
 338         mode->base.flags = 0;
 339         mode->base.width = info->hdisplay;
 340         mode->base.height = info->vdisplay;
 341         mode->base.refresh = info->vrefresh;
 342         mode->mode_info = *info;
 343         wl_list_insert(output->base.mode_list.prev, &mode->base.link);
 344
 345         return 0;
 346 }
 347
 348 static int
 349 drm_subpixel_to_wayland(int drm_value)
 350 {
 351         switch (drm_value) {
 352         default:
 353         case DRM_MODE_SUBPIXEL_UNKNOWN:
 354                 return WL_OUTPUT_SUBPIXEL_UNKNOWN;
 355         case DRM_MODE_SUBPIXEL_NONE:
 356                 return WL_OUTPUT_SUBPIXEL_NONE;
 357         case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
 358                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB;
 359         case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
 360                 return WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR;
 361         case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
 362                 return WL_OUTPUT_SUBPIXEL_VERTICAL_RGB;
 363         case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
 364                 return WL_OUTPUT_SUBPIXEL_VERTICAL_BGR;
 365         }
 366 }
 367
 368 static int
 369 create_output_for_connector(struct drm_compositor *ec,
 370                             drmModeRes *resources,
 371                             drmModeConnector *connector,
 372                             int x, int y)
 373 {
 374         struct drm_output *output;
 375         struct drm_mode *drm_mode;
 376         drmModeEncoder *encoder;
 377         int i, ret;
 378         EGLint handle, stride, attribs[] = {
 379                 EGL_WIDTH,              0,
 380                 EGL_HEIGHT,             0,
 381                 EGL_DRM_BUFFER_FORMAT_MESA,     EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 382                 EGL_DRM_BUFFER_USE_MESA,        EGL_DRM_BUFFER_USE_SCANOUT_MESA,
 383                 EGL_NONE
 384         };
 385
 386         encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
 387         if (encoder == NULL) {
 388                 fprintf(stderr, "No encoder for connector.\n");
 389                 return -1;
 390         }
 391
 392         for (i = 0; i < resources->count_crtcs; i++) {
 393                 if (encoder->possible_crtcs & (1 << i) &&
 394                     !(ec->crtc_allocator & (1 << resources->crtcs[i])))
 395                         break;
 396         }
 397         if (i == resources->count_crtcs) {
 398                 fprintf(stderr, "No usable crtc for encoder.\n");
 399                 return -1;
 400         }
 401
 402         output = malloc(sizeof *output);
 403         if (output == NULL)
 404                 return -1;
 405
 406         memset(output, 0, sizeof *output);
 407         output->base.x = x;
 408         output->base.y = y;
 409         output->base.mm_width = connector->mmWidth;
 410         output->base.mm_height = connector->mmHeight;
 411         output->base.subpixel = drm_subpixel_to_wayland(connector->subpixel);
 412         output->base.make = "unknown";
 413         output->base.model = "unknown";
 414         wl_list_init(&output->base.mode_list);
 415
 416         output->crtc_id = resources->crtcs[i];
 417         ec->crtc_allocator |= (1 << output->crtc_id);
 418         output->connector_id = connector->connector_id;
 419         ec->connector_allocator |= (1 << output->connector_id);
 420
 421         for (i = 0; i < connector->count_modes; i++)
 422                 drm_output_add_mode(output, &connector->modes[i]);
 423         if (connector->count_modes == 0)
 424                 drm_output_add_mode(output, &builtin_1024x768);
 425
 426         drm_mode = container_of(output->base.mode_list.next,
 427                                 struct drm_mode, base.link);
 428         output->base.current = &drm_mode->base;
 429         drm_mode->base.flags =
 430                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 431
 432         wlsc_output_init(&output->base, &ec->base, x, y, 200, 100, 0);
 433
 434         wl_list_insert(ec->base.output_list.prev, &output->base.link);
 435
 436         drmModeFreeEncoder(encoder);
 437
 438         glGenRenderbuffers(2, output->rbo);
 439         for (i = 0; i < 2; i++) {
 440                 glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
 441
 442                 attribs[1] = output->base.current->width;
 443                 attribs[3] = output->base.current->height;
 444                 output->image[i] =
 445                         ec->create_drm_image(ec->base.display, attribs);
 446                 ec->base.image_target_renderbuffer_storage(GL_RENDERBUFFER,
 447                                                            output->image[i]);
 448                 ec->export_drm_image(ec->base.display, output->image[i],
 449                                      NULL, &handle, &stride);
 450
 451                 ret = drmModeAddFB(ec->drm.fd,
 452                                    output->base.current->width,
 453                                    output->base.current->height,
 454                                    32, 32, stride, handle, &output->fb_id[i]);
 455                 if (ret) {
 456                         fprintf(stderr, "failed to add fb %d: %m\n", i);
 457                         return -1;
 458                 }
 459         }
 460
 461         output->current = 0;
 462         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 463                                   GL_COLOR_ATTACHMENT0,
 464                                   GL_RENDERBUFFER,
 465                                   output->rbo[output->current]);
 466         ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
 467                              output->fb_id[output->current ^ 1], 0, 0,
 468                              &output->connector_id, 1,
 469                              &drm_mode->mode_info);
 470         if (ret) {
 471                 fprintf(stderr, "failed to set mode: %m\n");
 472                 return -1;
 473         }
 474
 475         output->scanout_surface = NULL;
 476         output->base.prepare_render = drm_output_prepare_render;
 477         output->base.present = drm_output_present;
 478         output->base.prepare_scanout_surface =
 479                 drm_output_prepare_scanout_surface;
 480         output->base.set_hardware_cursor = drm_output_set_cursor;
 481
 482         return 0;
 483 }
 484
 485 static int
 486 create_outputs(struct drm_compositor *ec, int option_connector)
 487 {
 488         drmModeConnector *connector;
 489         drmModeRes *resources;
 490         int i;
 491         int x = 0, y = 0;
 492
 493         resources = drmModeGetResources(ec->drm.fd);
 494         if (!resources) {
 495                 fprintf(stderr, "drmModeGetResources failed\n");
 496                 return -1;
 497         }
 498
 499         for (i = 0; i < resources->count_connectors; i++) {
 500                 connector = drmModeGetConnector(ec->drm.fd, resources->connectors[i]);
 501                 if (connector == NULL)
 502                         continue;
 503
 504                 if (connector->connection == DRM_MODE_CONNECTED &&
 505                     (option_connector == 0 ||
 506                      connector->connector_id == option_connector))
 507                         if (create_output_for_connector(ec, resources,
 508                                                         connector, x, y) < 0)
 509                                 return -1;
 510
 511                 x += container_of(ec->base.output_list.prev, struct wlsc_output,
 512                                   link)->current->width;
 513
 514                 drmModeFreeConnector(connector);
 515         }
 516
 517         if (wl_list_empty(&ec->base.output_list)) {
 518                 fprintf(stderr, "No currently active connector found.\n");
 519                 return -1;
 520         }
 521
 522         drmModeFreeResources(resources);
 523
 524         return 0;
 525 }
 526
 527 static int
 528 destroy_output(struct drm_output *output)
 529 {
 530         struct drm_compositor *ec =
 531                 (struct drm_compositor *) output->base.compositor;
 532         int i;
 533
 534         glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 535                                   GL_COLOR_ATTACHMENT0,
 536                                   GL_RENDERBUFFER,
 537                                   0);
 538
 539         glBindRenderbuffer(GL_RENDERBUFFER, 0);
 540         glDeleteRenderbuffers(2, output->rbo);
 541
 542         for (i = 0; i < 2; i++) {
 543                 ec->base.destroy_image(ec->base.display, output->image[i]);
 544                 drmModeRmFB(ec->drm.fd, output->fb_id[i]);
 545         }
 546
 547         ec->crtc_allocator &= ~(1 << output->crtc_id);
 548         ec->connector_allocator &= ~(1 << output->connector_id);
 549
 550         wlsc_output_destroy(&output->base);
 551         wl_list_remove(&output->base.link);
 552
 553         free(output);
 554
 555         return 0;
 556 }
 557
 558 static void
 559 update_outputs(struct drm_compositor *ec)
 560 {
 561         drmModeConnector *connector;
 562         drmModeRes *resources;
 563         struct drm_output *output, *next;
 564         int x = 0, y = 0;
 565         int x_offset = 0, y_offset = 0;
 566         uint32_t connected = 0, disconnects = 0;
 567         int i;
 568
 569         resources = drmModeGetResources(ec->drm.fd);
 570         if (!resources) {
 571                 fprintf(stderr, "drmModeGetResources failed\n");
 572                 return;
 573         }
 574
 575         /* collect new connects */
 576         for (i = 0; i < resources->count_connectors; i++) {
 577                 connector =
 578                         drmModeGetConnector(ec->drm.fd,
 579                                             resources->connectors[i]);
 580                 if (connector == NULL ||
 581                     connector->connection != DRM_MODE_CONNECTED)
 582                         continue;
 583
 584                 connected |= (1 << connector->connector_id);
 585
 586                 if (!(ec->connector_allocator & (1 << connector->connector_id))) {
 587                         struct wlsc_output *last_output =
 588                                 container_of(ec->base.output_list.prev,
 589                                              struct wlsc_output, link);
 590
 591                         /* XXX: not yet needed, we die with 0 outputs */
 592                         if (!wl_list_empty(&ec->base.output_list))
 593                                 x = last_output->x + last_output->current->width;
 594                         else
 595                                 x = 0;
 596                         y = 0;
 597                         create_output_for_connector(ec, resources,
 598                                                     connector, x, y);
 599                         printf("connector %d connected\n",
 600                                connector->connector_id);
 601
 602                 }
 603                 drmModeFreeConnector(connector);
 604         }
 605         drmModeFreeResources(resources);
 606
 607         disconnects = ec->connector_allocator & ~connected;
 608         if (disconnects) {
 609                 wl_list_for_each_safe(output, next, &ec->base.output_list,
 610                                       base.link) {
 611                         if (x_offset != 0 || y_offset != 0) {
 612                                 wlsc_output_move(&output->base,
 613                                                  output->base.x - x_offset,
 614                                                  output->base.y - y_offset);
 615                         }
 616
 617                         if (disconnects & (1 << output->connector_id)) {
 618                                 disconnects &= ~(1 << output->connector_id);
 619                                 printf("connector %d disconnected\n",
 620                                        output->connector_id);
 621                                 x_offset += output->base.current->width;
 622                                 destroy_output(output);
 623                         }
 624                 }
 625         }
 626
 627         /* FIXME: handle zero outputs, without terminating */
 628         if (ec->connector_allocator == 0)
 629                 wl_display_terminate(ec->base.wl_display);
 630 }
 631
 632 static int
 633 udev_event_is_hotplug(struct udev_device *device)
 634 {
 635         struct udev_list_entry *list, *hotplug_entry;
 636
 637         list = udev_device_get_properties_list_entry(device);
 638
 639         hotplug_entry = udev_list_entry_get_by_name(list, "HOTPLUG");
 640         if (hotplug_entry == NULL)
 641                 return 0;
 642
 643         return strcmp(udev_list_entry_get_value(hotplug_entry), "1") == 0;
 644 }
 645
 646 static int
 647 udev_drm_event(int fd, uint32_t mask, void *data)
 648 {
 649         struct drm_compositor *ec = data;
 650         struct udev_device *event;
 651
 652         event = udev_monitor_receive_device(ec->udev_monitor);
 653
 654         if (udev_event_is_hotplug(event))
 655                 update_outputs(ec);
 656
 657         udev_device_unref(event);
 658
 659         return 1;
 660 }
 661
 662 static EGLImageKHR
 663 drm_compositor_create_cursor_image(struct wlsc_compositor *ec,
 664                                    int32_t width, int32_t height)
 665 {
 666         static const EGLint image_attribs[] = {
 667                 EGL_WIDTH, 64,
 668                 EGL_HEIGHT, 64,
 669                 EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
 670                 EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_CURSOR_MESA,
 671                 EGL_NONE
 672         };
 673         struct drm_compositor *c = (struct drm_compositor *) ec;
 674
 675         if (width > 64 || height > 64)
 676                 return EGL_NO_IMAGE_KHR;
 677
 678         return c->create_drm_image(ec->display, image_attribs);
 679 }
 680
 681 static void
 682 drm_destroy(struct wlsc_compositor *ec)
 683 {
 684         struct drm_compositor *d = (struct drm_compositor *) ec;
 685
 686         tty_destroy(d->tty);
 687
 688         free(d);
 689 }
 690
 691 static void
 692 vt_func(struct wlsc_compositor *compositor, int event)
 693 {
 694         struct drm_compositor *ec = (struct drm_compositor *) compositor;
 695         struct wlsc_output *output;
 696
 697         switch (event) {
 698         case TTY_ENTER_VT:
 699                 compositor->focus = 1;
 700                 drmSetMaster(ec->drm.fd);
 701                 compositor->state = WLSC_COMPOSITOR_ACTIVE;
 702                 wlsc_compositor_damage_all(compositor);
 703                 break;
 704         case TTY_LEAVE_VT:
 705                 compositor->focus = 0;
 706                 compositor->state = WLSC_COMPOSITOR_SLEEPING;
 707                 drmDropMaster(ec->drm.fd);
 708
 709                 wl_list_for_each(output, &ec->base.output_list, link)
 710                         drm_output_set_cursor(output, NULL);
 711
 712                 break;
 713         };
 714 }
 715
 716 static struct wlsc_compositor *
 717 drm_compositor_create(struct wl_display *display, int connector)
 718 {
 719         struct drm_compositor *ec;
 720         struct udev_enumerate *e;
 721         struct udev_list_entry *entry;
 722         struct udev_device *device;
 723         const char *path;
 724         struct wl_event_loop *loop;
 725
 726         ec = malloc(sizeof *ec);
 727         if (ec == NULL)
 728                 return NULL;
 729
 730         memset(ec, 0, sizeof *ec);
 731         ec->udev = udev_new();
 732         if (ec->udev == NULL) {
 733                 fprintf(stderr, "failed to initialize udev context\n");
 734                 return NULL;
 735         }
 736
 737         e = udev_enumerate_new(ec->udev);
 738         udev_enumerate_add_match_subsystem(e, "drm");
 739         udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
 740         udev_enumerate_scan_devices(e);
 741         device = NULL;
 742         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 743                 path = udev_list_entry_get_name(entry);
 744                 device = udev_device_new_from_syspath(ec->udev, path);
 745                 break;
 746         }
 747         udev_enumerate_unref(e);
 748
 749         if (device == NULL) {
 750                 fprintf(stderr, "no drm device found\n");
 751                 return NULL;
 752         }
 753
 754         ec->base.wl_display = display;
 755         if (init_egl(ec, device) < 0) {
 756                 fprintf(stderr, "failed to initialize egl\n");
 757                 return NULL;
 758         }
 759
 760         ec->base.destroy = drm_destroy;
 761         ec->base.create_cursor_image = drm_compositor_create_cursor_image;
 762
 763         ec->base.focus = 1;
 764
 765         glGenFramebuffers(1, &ec->base.fbo);
 766         glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
 767
 768         ec->create_drm_image =
 769                 (void *) eglGetProcAddress("eglCreateDRMImageMESA");
 770         ec->export_drm_image =
 771                 (void *) eglGetProcAddress("eglExportDRMImageMESA");
 772
 773         /* Can't init base class until we have a current egl context */
 774         if (wlsc_compositor_init(&ec->base, display) < 0)
 775                 return NULL;
 776
 777         if (create_outputs(ec, connector) < 0) {
 778                 fprintf(stderr, "failed to create output for %s\n", path);
 779                 return NULL;
 780         }
 781
 782         evdev_input_add_devices(&ec->base, ec->udev);
 783
 784         loop = wl_display_get_event_loop(ec->base.wl_display);
 785         ec->drm_source =
 786                 wl_event_loop_add_fd(loop, ec->drm.fd,
 787                                      WL_EVENT_READABLE, on_drm_input, ec);
 788         ec->tty = tty_create(&ec->base, vt_func);
 789
 790         ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
 791         if (ec->udev_monitor == NULL) {
 792                 fprintf(stderr, "failed to intialize udev monitor\n");
 793                 return NULL;
 794         }
 795         udev_monitor_filter_add_match_subsystem_devtype(ec->udev_monitor,
 796                                                         "drm", NULL);
 797         ec->udev_drm_source =
 798                 wl_event_loop_add_fd(loop, udev_monitor_get_fd(ec->udev_monitor),
 799                                      WL_EVENT_READABLE, udev_drm_event, ec);
 800
 801         if (udev_monitor_enable_receiving(ec->udev_monitor) < 0) {
 802                 fprintf(stderr, "failed to enable udev-monitor receiving\n");
 803                 return NULL;
 804         }
 805
 806         return &ec->base;
 807 }
 808
 809 struct wlsc_compositor *
 810 backend_init(struct wl_display *display, char *options);
 811
 812 WL_EXPORT struct wlsc_compositor *
 813 backend_init(struct wl_display *display, char *options)
 814 {
 815         int connector = 0, i;
 816         char *p, *value;
 817
 818         static char * const tokens[] = { "connector", NULL };
 819
 820         p = options;
 821         while (i = getsubopt(&p, tokens, &value), i != -1) {
 822                 switch (i) {
 823                 case 0:
 824                         connector = strtol(value, NULL, 0);
 825                         break;
 826                 }
 827         }
 828
 829         return drm_compositor_create(display, connector);
 830 }