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