src/egl/drivers/dri2/platform_wayland.c

   1 /*
   2  * Copyright © 2011-2012 Intel Corporation
   3  * Copyright © 2012 Collabora, Ltd.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  20  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Kristian Høgsberg <krh@bitplanet.net>
  27  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  28  */
  29
  30 #include <stdint.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <xf86drm.h>
  39 #include <sys/mman.h>
  40
  41 #include "egl_dri2.h"
  42 #include "egl_dri2_fallbacks.h"
  43 #include "loader.h"
  44
  45 #include <wayland-client.h>
  46 #include "wayland-drm-client-protocol.h"
  47
  48 enum wl_drm_format_flags {
  49    HAS_ARGB8888 = 1,
  50    HAS_XRGB8888 = 2,
  51    HAS_RGB565 = 4,
  52 };
  53
  54 static EGLBoolean
  55 dri2_wl_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                       EGLint interval);
  57
  58 static int
  59 roundtrip(struct dri2_egl_display *dri2_dpy)
  60 {
  61    return wl_display_roundtrip_queue(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
  62 }
  63
  64 static void
  65 wl_buffer_release(void *data, struct wl_buffer *buffer)
  66 {
  67    struct dri2_egl_surface *dri2_surf = data;
  68    int i;
  69
  70    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); ++i)
  71       if (dri2_surf->color_buffers[i].wl_buffer == buffer)
  72          break;
  73
  74    if (i == ARRAY_SIZE(dri2_surf->color_buffers)) {
  75       wl_buffer_destroy(buffer);
  76       return;
  77    }
  78
  79    dri2_surf->color_buffers[i].locked = false;
  80 }
  81
  82 static const struct wl_buffer_listener wl_buffer_listener = {
  83    .release = wl_buffer_release
  84 };
  85
  86 static void
  87 resize_callback(struct wl_egl_window *wl_win, void *data)
  88 {
  89    struct dri2_egl_surface *dri2_surf = data;
  90    struct dri2_egl_display *dri2_dpy =
  91       dri2_egl_display(dri2_surf->base.Resource.Display);
  92
  93    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
  94 }
  95
  96 static void
  97 destroy_window_callback(void *data)
  98 {
  99    struct dri2_egl_surface *dri2_surf = data;
 100    dri2_surf->wl_win = NULL;
 101 }
 102
 103 /**
 104  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 105  */
 106 static _EGLSurface *
 107 dri2_wl_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 108                               _EGLConfig *conf, void *native_window,
 109                               const EGLint *attrib_list)
 110 {
 111    __DRIcreateNewDrawableFunc createNewDrawable;
 112    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 113    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 114    struct wl_egl_window *window = native_window;
 115    struct dri2_egl_surface *dri2_surf;
 116    const __DRIconfig *config;
 117
 118    dri2_surf = calloc(1, sizeof *dri2_surf);
 119    if (!dri2_surf) {
 120       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 121       return NULL;
 122    }
 123
 124    if (!_eglInitSurface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list))
 125       goto cleanup_surf;
 126
 127    if (dri2_dpy->wl_drm) {
 128       if (conf->RedSize == 5)
 129          dri2_surf->format = WL_DRM_FORMAT_RGB565;
 130       else if (conf->AlphaSize == 0)
 131          dri2_surf->format = WL_DRM_FORMAT_XRGB8888;
 132       else
 133          dri2_surf->format = WL_DRM_FORMAT_ARGB8888;
 134    } else {
 135       assert(dri2_dpy->wl_shm);
 136       if (conf->RedSize == 5)
 137          dri2_surf->format = WL_SHM_FORMAT_RGB565;
 138       else if (conf->AlphaSize == 0)
 139          dri2_surf->format = WL_SHM_FORMAT_XRGB8888;
 140       else
 141          dri2_surf->format = WL_SHM_FORMAT_ARGB8888;
 142    }
 143
 144    if (!window) {
 145       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 146       goto cleanup_surf;
 147    }
 148
 149    dri2_surf->wl_win = window;
 150    dri2_surf->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
 151    if (!dri2_surf->wl_queue) {
 152       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 153       goto cleanup_surf;
 154    }
 155
 156    if (dri2_dpy->wl_drm) {
 157       dri2_surf->wl_drm_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_drm);
 158       if (!dri2_surf->wl_drm_wrapper) {
 159          _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 160          goto cleanup_queue;
 161       }
 162       wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_drm_wrapper,
 163                          dri2_surf->wl_queue);
 164    }
 165
 166    dri2_surf->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
 167    if (!dri2_surf->wl_dpy_wrapper) {
 168       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 169       goto cleanup_drm;
 170    }
 171    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_dpy_wrapper,
 172                       dri2_surf->wl_queue);
 173
 174    dri2_surf->wl_surface_wrapper = wl_proxy_create_wrapper(window->surface);
 175    if (!dri2_surf->wl_surface_wrapper) {
 176       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 177       goto cleanup_drm;
 178    }
 179    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_surface_wrapper,
 180                       dri2_surf->wl_queue);
 181
 182    dri2_surf->wl_win->private = dri2_surf;
 183    dri2_surf->wl_win->destroy_window_callback = destroy_window_callback;
 184
 185    dri2_surf->base.Width =  -1;
 186    dri2_surf->base.Height = -1;
 187
 188    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 189                                 dri2_surf->base.GLColorspace);
 190
 191    if (dri2_dpy->flush)
 192       dri2_surf->wl_win->resize_callback = resize_callback;
 193
 194    if (dri2_dpy->image_driver)
 195       createNewDrawable = dri2_dpy->image_driver->createNewDrawable;
 196    else if (dri2_dpy->dri2)
 197       createNewDrawable = dri2_dpy->dri2->createNewDrawable;
 198    else
 199       createNewDrawable = dri2_dpy->swrast->createNewDrawable;
 200
 201    dri2_surf->dri_drawable = (*createNewDrawable)(dri2_dpy->dri_screen, config,
 202                                                   dri2_surf);
 203     if (dri2_surf->dri_drawable == NULL) {
 204       _eglError(EGL_BAD_ALLOC, "createNewDrawable");
 205        goto cleanup_surf;
 206     }
 207
 208    dri2_wl_swap_interval(drv, disp, &dri2_surf->base,
 209                          dri2_dpy->default_swap_interval);
 210
 211    return &dri2_surf->base;
 212
 213  cleanup_drm:
 214    if (dri2_surf->wl_drm_wrapper)
 215       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 216  cleanup_queue:
 217    wl_event_queue_destroy(dri2_surf->wl_queue);
 218  cleanup_surf:
 219    free(dri2_surf);
 220
 221    return NULL;
 222 }
 223
 224 static _EGLSurface *
 225 dri2_wl_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 226                               _EGLConfig *conf, void *native_window,
 227                               const EGLint *attrib_list)
 228 {
 229    /* From the EGL_EXT_platform_wayland spec, version 3:
 230     *
 231     *   It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 232     *   that belongs to Wayland. Any such call fails and generates
 233     *   EGL_BAD_PARAMETER.
 234     */
 235    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on "
 236              "Wayland");
 237    return NULL;
 238 }
 239
 240 /**
 241  * Called via eglDestroySurface(), drv->API.DestroySurface().
 242  */
 243 static EGLBoolean
 244 dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 245 {
 246    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 247    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 248    int i;
 249
 250    (void) drv;
 251
 252    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 253
 254    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 255       if (dri2_surf->color_buffers[i].wl_buffer)
 256          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 257       if (dri2_surf->color_buffers[i].dri_image)
 258          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 259       if (dri2_surf->color_buffers[i].linear_copy)
 260          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 261       if (dri2_surf->color_buffers[i].data)
 262          munmap(dri2_surf->color_buffers[i].data,
 263                 dri2_surf->color_buffers[i].data_size);
 264    }
 265
 266    if (dri2_dpy->dri2) {
 267       for (i = 0; i < __DRI_BUFFER_COUNT; i++)
 268          if (dri2_surf->dri_buffers[i] &&
 269              dri2_surf->dri_buffers[i]->attachment != __DRI_BUFFER_BACK_LEFT)
 270             dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 271                                           dri2_surf->dri_buffers[i]);
 272    }
 273
 274    if (dri2_surf->throttle_callback)
 275       wl_callback_destroy(dri2_surf->throttle_callback);
 276
 277    if (dri2_surf->wl_win) {
 278       dri2_surf->wl_win->private = NULL;
 279       dri2_surf->wl_win->resize_callback = NULL;
 280       dri2_surf->wl_win->destroy_window_callback = NULL;
 281    }
 282
 283    if (dri2_surf->wl_drm_wrapper)
 284       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 285    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 286    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 287    wl_event_queue_destroy(dri2_surf->wl_queue);
 288
 289    free(surf);
 290
 291    return EGL_TRUE;
 292 }
 293
 294 static void
 295 dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
 296 {
 297    struct dri2_egl_display *dri2_dpy =
 298       dri2_egl_display(dri2_surf->base.Resource.Display);
 299    int i;
 300
 301    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 302       if (dri2_surf->color_buffers[i].wl_buffer &&
 303           !dri2_surf->color_buffers[i].locked)
 304          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 305       if (dri2_surf->color_buffers[i].dri_image)
 306          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 307       if (dri2_surf->color_buffers[i].linear_copy)
 308          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 309       if (dri2_surf->color_buffers[i].data)
 310          munmap(dri2_surf->color_buffers[i].data,
 311                 dri2_surf->color_buffers[i].data_size);
 312
 313       dri2_surf->color_buffers[i].wl_buffer = NULL;
 314       dri2_surf->color_buffers[i].dri_image = NULL;
 315       dri2_surf->color_buffers[i].linear_copy = NULL;
 316       dri2_surf->color_buffers[i].data = NULL;
 317       dri2_surf->color_buffers[i].locked = false;
 318    }
 319
 320    if (dri2_dpy->dri2) {
 321       for (i = 0; i < __DRI_BUFFER_COUNT; i++)
 322          if (dri2_surf->dri_buffers[i] &&
 323              dri2_surf->dri_buffers[i]->attachment != __DRI_BUFFER_BACK_LEFT)
 324             dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 325                                           dri2_surf->dri_buffers[i]);
 326    }
 327 }
 328
 329 static int
 330 get_back_bo(struct dri2_egl_surface *dri2_surf)
 331 {
 332    struct dri2_egl_display *dri2_dpy =
 333       dri2_egl_display(dri2_surf->base.Resource.Display);
 334    int i, use_flags;
 335    unsigned int dri_image_format;
 336
 337    /* currently supports three WL DRM formats,
 338     * WL_DRM_FORMAT_ARGB8888, WL_DRM_FORMAT_XRGB8888,
 339     * and WL_DRM_FORMAT_RGB565
 340     */
 341    switch (dri2_surf->format) {
 342    case WL_DRM_FORMAT_ARGB8888:
 343       dri_image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 344       break;
 345    case WL_DRM_FORMAT_XRGB8888:
 346       dri_image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 347       break;
 348    case WL_DRM_FORMAT_RGB565:
 349       dri_image_format = __DRI_IMAGE_FORMAT_RGB565;
 350       break;
 351    default:
 352       /* format is not supported */
 353       return -1;
 354    }
 355
 356    /* There might be a buffer release already queued that wasn't processed */
 357    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
 358
 359    while (dri2_surf->back == NULL) {
 360       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 361          /* Get an unlocked buffer, preferrably one with a dri_buffer
 362           * already allocated. */
 363          if (dri2_surf->color_buffers[i].locked)
 364             continue;
 365          if (dri2_surf->back == NULL)
 366             dri2_surf->back = &dri2_surf->color_buffers[i];
 367          else if (dri2_surf->back->dri_image == NULL)
 368             dri2_surf->back = &dri2_surf->color_buffers[i];
 369       }
 370
 371       if (dri2_surf->back)
 372          break;
 373
 374       /* If we don't have a buffer, then block on the server to release one for
 375        * us, and try again. */
 376       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy, dri2_surf->wl_queue) < 0)
 377           return -1;
 378    }
 379
 380    if (dri2_surf->back == NULL)
 381       return -1;
 382
 383    use_flags = __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_BACKBUFFER;
 384
 385    if (dri2_dpy->is_different_gpu &&
 386        dri2_surf->back->linear_copy == NULL) {
 387        dri2_surf->back->linear_copy =
 388           dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 389                                       dri2_surf->base.Width,
 390                                       dri2_surf->base.Height,
 391                                       dri_image_format,
 392                                       use_flags |
 393                                       __DRI_IMAGE_USE_LINEAR,
 394                                       NULL);
 395       if (dri2_surf->back->linear_copy == NULL)
 396           return -1;
 397    }
 398
 399    if (dri2_surf->back->dri_image == NULL) {
 400       dri2_surf->back->dri_image =
 401          dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 402                                       dri2_surf->base.Width,
 403                                       dri2_surf->base.Height,
 404                                       dri_image_format,
 405                                       dri2_dpy->is_different_gpu ?
 406                                          0 : use_flags,
 407                                       NULL);
 408       dri2_surf->back->age = 0;
 409    }
 410    if (dri2_surf->back->dri_image == NULL)
 411       return -1;
 412
 413    dri2_surf->back->locked = true;
 414
 415    return 0;
 416 }
 417
 418
 419 static void
 420 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 421 {
 422    struct dri2_egl_display *dri2_dpy =
 423       dri2_egl_display(dri2_surf->base.Resource.Display);
 424    __DRIimage *image;
 425    int name, pitch;
 426
 427    image = dri2_surf->back->dri_image;
 428
 429    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 430    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 431
 432    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 433    buffer->name = name;
 434    buffer->pitch = pitch;
 435    buffer->cpp = 4;
 436    buffer->flags = 0;
 437 }
 438
 439 static int
 440 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 441            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 442 {
 443    struct dri2_egl_display *dri2_dpy =
 444       dri2_egl_display(dri2_surf->base.Resource.Display);
 445    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 446
 447    if (b == NULL) {
 448       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 449                                          attachment, format,
 450                                          dri2_surf->base.Width,
 451                                          dri2_surf->base.Height);
 452       dri2_surf->dri_buffers[attachment] = b;
 453    }
 454    if (b == NULL)
 455       return -1;
 456
 457    memcpy(buffer, b, sizeof *buffer);
 458
 459    return 0;
 460 }
 461
 462 static int
 463 update_buffers(struct dri2_egl_surface *dri2_surf)
 464 {
 465    struct dri2_egl_display *dri2_dpy =
 466       dri2_egl_display(dri2_surf->base.Resource.Display);
 467    int i;
 468
 469    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
 470        dri2_surf->base.Height != dri2_surf->wl_win->height) {
 471
 472       dri2_wl_release_buffers(dri2_surf);
 473
 474       dri2_surf->base.Width  = dri2_surf->wl_win->width;
 475       dri2_surf->base.Height = dri2_surf->wl_win->height;
 476       dri2_surf->dx = dri2_surf->wl_win->dx;
 477       dri2_surf->dy = dri2_surf->wl_win->dy;
 478    }
 479
 480    if (get_back_bo(dri2_surf) < 0) {
 481       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 482       return -1;
 483    }
 484
 485    /* If we have an extra unlocked buffer at this point, we had to do triple
 486     * buffering for a while, but now can go back to just double buffering.
 487     * That means we can free any unlocked buffer now. */
 488    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 489       if (!dri2_surf->color_buffers[i].locked &&
 490           dri2_surf->color_buffers[i].wl_buffer) {
 491          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 492          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 493          if (dri2_dpy->is_different_gpu)
 494             dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 495          dri2_surf->color_buffers[i].wl_buffer = NULL;
 496          dri2_surf->color_buffers[i].dri_image = NULL;
 497          dri2_surf->color_buffers[i].linear_copy = NULL;
 498       }
 499    }
 500
 501    return 0;
 502 }
 503
 504 static __DRIbuffer *
 505 dri2_wl_get_buffers_with_format(__DRIdrawable * driDrawable,
 506                                 int *width, int *height,
 507                                 unsigned int *attachments, int count,
 508                                 int *out_count, void *loaderPrivate)
 509 {
 510    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 511    int i, j;
 512
 513    if (update_buffers(dri2_surf) < 0)
 514       return NULL;
 515
 516    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 517       switch (attachments[i]) {
 518       case __DRI_BUFFER_BACK_LEFT:
 519          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 520          break;
 521       default:
 522          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 523                         &dri2_surf->buffers[j]) < 0) {
 524             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 525             return NULL;
 526          }
 527          break;
 528       }
 529    }
 530
 531    *out_count = j;
 532    if (j == 0)
 533            return NULL;
 534
 535    *width = dri2_surf->base.Width;
 536    *height = dri2_surf->base.Height;
 537
 538    return dri2_surf->buffers;
 539 }
 540
 541 static __DRIbuffer *
 542 dri2_wl_get_buffers(__DRIdrawable * driDrawable,
 543                     int *width, int *height,
 544                     unsigned int *attachments, int count,
 545                     int *out_count, void *loaderPrivate)
 546 {
 547    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 548    unsigned int *attachments_with_format;
 549    __DRIbuffer *buffer;
 550    unsigned int bpp;
 551
 552    int i;
 553
 554    switch (dri2_surf->format) {
 555    case WL_DRM_FORMAT_ARGB8888:
 556    case WL_DRM_FORMAT_XRGB8888:
 557       bpp = 32;
 558       break;
 559    case WL_DRM_FORMAT_RGB565:
 560       bpp = 16;
 561       break;
 562    default:
 563       /* format is not supported */
 564       return NULL;
 565    }
 566
 567    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 568    if (!attachments_with_format) {
 569       *out_count = 0;
 570       return NULL;
 571    }
 572
 573    for (i = 0; i < count; ++i) {
 574       attachments_with_format[2*i] = attachments[i];
 575       attachments_with_format[2*i + 1] = bpp;
 576    }
 577
 578    buffer =
 579       dri2_wl_get_buffers_with_format(driDrawable,
 580                                       width, height,
 581                                       attachments_with_format, count,
 582                                       out_count, loaderPrivate);
 583
 584    free(attachments_with_format);
 585
 586    return buffer;
 587 }
 588
 589 static int
 590 image_get_buffers(__DRIdrawable *driDrawable,
 591                   unsigned int format,
 592                   uint32_t *stamp,
 593                   void *loaderPrivate,
 594                   uint32_t buffer_mask,
 595                   struct __DRIimageList *buffers)
 596 {
 597    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 598
 599    if (update_buffers(dri2_surf) < 0)
 600       return 0;
 601
 602    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 603    buffers->back = dri2_surf->back->dri_image;
 604
 605    return 1;
 606 }
 607
 608 static void
 609 dri2_wl_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 610 {
 611    (void) driDrawable;
 612    (void) loaderPrivate;
 613 }
 614
 615 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 616    .base = { __DRI_DRI2_LOADER, 3 },
 617
 618    .getBuffers           = dri2_wl_get_buffers,
 619    .flushFrontBuffer     = dri2_wl_flush_front_buffer,
 620    .getBuffersWithFormat = dri2_wl_get_buffers_with_format,
 621 };
 622
 623 static const __DRIimageLoaderExtension image_loader_extension = {
 624    .base = { __DRI_IMAGE_LOADER, 1 },
 625
 626    .getBuffers          = image_get_buffers,
 627    .flushFrontBuffer    = dri2_wl_flush_front_buffer,
 628 };
 629
 630 static void
 631 wayland_throttle_callback(void *data,
 632                           struct wl_callback *callback,
 633                           uint32_t time)
 634 {
 635    struct dri2_egl_surface *dri2_surf = data;
 636
 637    dri2_surf->throttle_callback = NULL;
 638    wl_callback_destroy(callback);
 639 }
 640
 641 static const struct wl_callback_listener throttle_listener = {
 642    .done = wayland_throttle_callback
 643 };
 644
 645 static void
 646 create_wl_buffer(struct dri2_egl_surface *dri2_surf)
 647 {
 648    struct dri2_egl_display *dri2_dpy =
 649       dri2_egl_display(dri2_surf->base.Resource.Display);
 650    __DRIimage *image;
 651    int fd, stride, name;
 652
 653    if (dri2_surf->current->wl_buffer != NULL)
 654       return;
 655
 656    if (dri2_dpy->is_different_gpu) {
 657       image = dri2_surf->current->linear_copy;
 658    } else {
 659       image = dri2_surf->current->dri_image;
 660    }
 661    if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 662       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 663       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 664
 665       dri2_surf->current->wl_buffer =
 666          wl_drm_create_prime_buffer(dri2_surf->wl_drm_wrapper,
 667                                     fd,
 668                                     dri2_surf->base.Width,
 669                                     dri2_surf->base.Height,
 670                                     dri2_surf->format,
 671                                     0, stride,
 672                                     0, 0,
 673                                     0, 0);
 674       close(fd);
 675    } else {
 676       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 677       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 678
 679       dri2_surf->current->wl_buffer =
 680          wl_drm_create_buffer(dri2_surf->wl_drm_wrapper,
 681                               name,
 682                               dri2_surf->base.Width,
 683                               dri2_surf->base.Height,
 684                               stride,
 685                               dri2_surf->format);
 686    }
 687
 688    wl_buffer_add_listener(dri2_surf->current->wl_buffer,
 689                           &wl_buffer_listener, dri2_surf);
 690 }
 691
 692 static EGLBoolean
 693 try_damage_buffer(struct dri2_egl_surface *dri2_surf,
 694                   const EGLint *rects,
 695                   EGLint n_rects)
 696 {
 697    int i;
 698
 699    if (wl_proxy_get_version((struct wl_proxy *) dri2_surf->wl_surface_wrapper)
 700        < WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION)
 701       return EGL_FALSE;
 702
 703    for (i = 0; i < n_rects; i++) {
 704       const int *rect = &rects[i * 4];
 705
 706       wl_surface_damage_buffer(dri2_surf->wl_surface_wrapper,
 707                                rect[0],
 708                                dri2_surf->base.Height - rect[1] - rect[3],
 709                                rect[2], rect[3]);
 710    }
 711    return EGL_TRUE;
 712 }
 713 /**
 714  * Called via eglSwapBuffers(), drv->API.SwapBuffers().
 715  */
 716 static EGLBoolean
 717 dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
 718                                  _EGLDisplay *disp,
 719                                  _EGLSurface *draw,
 720                                  const EGLint *rects,
 721                                  EGLint n_rects)
 722 {
 723    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 724    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 725    int i;
 726
 727    while (dri2_surf->throttle_callback != NULL)
 728       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
 729                                     dri2_surf->wl_queue) == -1)
 730          return -1;
 731
 732    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 733       if (dri2_surf->color_buffers[i].age > 0)
 734          dri2_surf->color_buffers[i].age++;
 735
 736    /* Make sure we have a back buffer in case we're swapping without ever
 737     * rendering. */
 738    if (get_back_bo(dri2_surf) < 0) {
 739       _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 740       return EGL_FALSE;
 741    }
 742
 743    if (draw->SwapInterval > 0) {
 744       dri2_surf->throttle_callback =
 745          wl_surface_frame(dri2_surf->wl_surface_wrapper);
 746       wl_callback_add_listener(dri2_surf->throttle_callback,
 747                                &throttle_listener, dri2_surf);
 748    }
 749
 750    dri2_surf->back->age = 1;
 751    dri2_surf->current = dri2_surf->back;
 752    dri2_surf->back = NULL;
 753
 754    create_wl_buffer(dri2_surf);
 755
 756    wl_surface_attach(dri2_surf->wl_surface_wrapper,
 757                      dri2_surf->current->wl_buffer,
 758                      dri2_surf->dx, dri2_surf->dy);
 759
 760    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
 761    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
 762    /* reset resize growing parameters */
 763    dri2_surf->dx = 0;
 764    dri2_surf->dy = 0;
 765
 766    /* If the compositor doesn't support damage_buffer, we deliberately
 767     * ignore the damage region and post maximum damage, due to
 768     * https://bugs.freedesktop.org/78190 */
 769    if (!n_rects || !try_damage_buffer(dri2_surf, rects, n_rects))
 770       wl_surface_damage(dri2_surf->wl_surface_wrapper,
 771                         0, 0, INT32_MAX, INT32_MAX);
 772
 773    if (dri2_dpy->is_different_gpu) {
 774       _EGLContext *ctx = _eglGetCurrentContext();
 775       struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 776       dri2_dpy->image->blitImage(dri2_ctx->dri_context,
 777                                  dri2_surf->current->linear_copy,
 778                                  dri2_surf->current->dri_image,
 779                                  0, 0, dri2_surf->base.Width,
 780                                  dri2_surf->base.Height,
 781                                  0, 0, dri2_surf->base.Width,
 782                                  dri2_surf->base.Height, 0);
 783    }
 784
 785    dri2_flush_drawable_for_swapbuffers(disp, draw);
 786    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 787
 788    wl_surface_commit(dri2_surf->wl_surface_wrapper);
 789
 790    /* If we're not waiting for a frame callback then we'll at least throttle
 791     * to a sync callback so that we always give a chance for the compositor to
 792     * handle the commit and send a release event before checking for a free
 793     * buffer */
 794    if (dri2_surf->throttle_callback == NULL) {
 795       dri2_surf->throttle_callback = wl_display_sync(dri2_surf->wl_dpy_wrapper);
 796       wl_callback_add_listener(dri2_surf->throttle_callback,
 797                                &throttle_listener, dri2_surf);
 798    }
 799
 800    wl_display_flush(dri2_dpy->wl_dpy);
 801
 802    return EGL_TRUE;
 803 }
 804
 805 static EGLint
 806 dri2_wl_query_buffer_age(_EGLDriver *drv,
 807                          _EGLDisplay *disp, _EGLSurface *surface)
 808 {
 809    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 810
 811    if (get_back_bo(dri2_surf) < 0) {
 812       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 813       return -1;
 814    }
 815
 816    return dri2_surf->back->age;
 817 }
 818
 819 static EGLBoolean
 820 dri2_wl_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 821 {
 822    return dri2_wl_swap_buffers_with_damage (drv, disp, draw, NULL, 0);
 823 }
 824
 825 static struct wl_buffer *
 826 dri2_wl_create_wayland_buffer_from_image(_EGLDriver *drv,
 827                                           _EGLDisplay *disp,
 828                                           _EGLImage *img)
 829 {
 830    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 831    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
 832    __DRIimage *image = dri2_img->dri_image;
 833    struct wl_buffer *buffer;
 834    int width, height, format, pitch;
 835    enum wl_drm_format wl_format;
 836
 837    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &format);
 838
 839    switch (format) {
 840    case __DRI_IMAGE_FORMAT_ARGB8888:
 841       if (!(dri2_dpy->formats & HAS_ARGB8888))
 842          goto bad_format;
 843       wl_format = WL_DRM_FORMAT_ARGB8888;
 844       break;
 845    case __DRI_IMAGE_FORMAT_XRGB8888:
 846       if (!(dri2_dpy->formats & HAS_XRGB8888))
 847          goto bad_format;
 848       wl_format = WL_DRM_FORMAT_XRGB8888;
 849       break;
 850    default:
 851       goto bad_format;
 852    }
 853
 854    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_WIDTH, &width);
 855    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_HEIGHT, &height);
 856    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 857
 858    if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 859       int fd;
 860
 861       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 862
 863       buffer =
 864          wl_drm_create_prime_buffer(dri2_dpy->wl_drm,
 865                                     fd,
 866                                     width, height,
 867                                     wl_format,
 868                                     0, pitch,
 869                                     0, 0,
 870                                     0, 0);
 871
 872       close(fd);
 873    } else {
 874       int name;
 875
 876       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 877
 878       buffer =
 879          wl_drm_create_buffer(dri2_dpy->wl_drm,
 880                               name,
 881                               width, height,
 882                               pitch,
 883                               wl_format);
 884    }
 885
 886    /* The buffer object will have been created with our internal event queue
 887     * because it is using the wl_drm object as a proxy factory. We want the
 888     * buffer to be used by the application so we'll reset it to the display's
 889     * default event queue */
 890    if (buffer)
 891       wl_proxy_set_queue((struct wl_proxy *) buffer, NULL);
 892
 893    return buffer;
 894
 895 bad_format:
 896    _eglError(EGL_BAD_MATCH, "unsupported image format");
 897    return NULL;
 898 }
 899
 900 static int
 901 dri2_wl_authenticate(_EGLDisplay *disp, uint32_t id)
 902 {
 903    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 904    int ret = 0;
 905
 906    if (dri2_dpy->is_render_node) {
 907       _eglLog(_EGL_WARNING, "wayland-egl: client asks server to "
 908                             "authenticate for render-nodes");
 909       return 0;
 910    }
 911    dri2_dpy->authenticated = false;
 912
 913    wl_drm_authenticate(dri2_dpy->wl_drm, id);
 914    if (roundtrip(dri2_dpy) < 0)
 915       ret = -1;
 916
 917    if (!dri2_dpy->authenticated)
 918       ret = -1;
 919
 920    /* reset authenticated */
 921    dri2_dpy->authenticated = true;
 922
 923    return ret;
 924 }
 925
 926 static void
 927 drm_handle_device(void *data, struct wl_drm *drm, const char *device)
 928 {
 929    struct dri2_egl_display *dri2_dpy = data;
 930    drm_magic_t magic;
 931
 932    dri2_dpy->device_name = strdup(device);
 933    if (!dri2_dpy->device_name)
 934       return;
 935
 936    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 937    if (dri2_dpy->fd == -1) {
 938       _eglLog(_EGL_WARNING, "wayland-egl: could not open %s (%s)",
 939               dri2_dpy->device_name, strerror(errno));
 940       return;
 941    }
 942
 943    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
 944       dri2_dpy->authenticated = true;
 945    } else {
 946       drmGetMagic(dri2_dpy->fd, &magic);
 947       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
 948    }
 949 }
 950
 951 static void
 952 drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
 953 {
 954    struct dri2_egl_display *dri2_dpy = data;
 955
 956    switch (format) {
 957    case WL_DRM_FORMAT_ARGB8888:
 958       dri2_dpy->formats |= HAS_ARGB8888;
 959       break;
 960    case WL_DRM_FORMAT_XRGB8888:
 961       dri2_dpy->formats |= HAS_XRGB8888;
 962       break;
 963    case WL_DRM_FORMAT_RGB565:
 964       dri2_dpy->formats |= HAS_RGB565;
 965       break;
 966    }
 967 }
 968
 969 static void
 970 drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
 971 {
 972    struct dri2_egl_display *dri2_dpy = data;
 973
 974    dri2_dpy->capabilities = value;
 975 }
 976
 977 static void
 978 drm_handle_authenticated(void *data, struct wl_drm *drm)
 979 {
 980    struct dri2_egl_display *dri2_dpy = data;
 981
 982    dri2_dpy->authenticated = true;
 983 }
 984
 985 static const struct wl_drm_listener drm_listener = {
 986    .device = drm_handle_device,
 987    .format = drm_handle_format,
 988    .authenticated = drm_handle_authenticated,
 989    .capabilities = drm_handle_capabilities
 990 };
 991
 992 static void
 993 registry_handle_global_drm(void *data, struct wl_registry *registry, uint32_t name,
 994                        const char *interface, uint32_t version)
 995 {
 996    struct dri2_egl_display *dri2_dpy = data;
 997
 998    if (version > 1)
 999       version = 2;
1000    if (strcmp(interface, "wl_drm") == 0) {
1001       dri2_dpy->wl_drm =
1002          wl_registry_bind(registry, name, &wl_drm_interface, version);
1003       wl_drm_add_listener(dri2_dpy->wl_drm, &drm_listener, dri2_dpy);
1004    }
1005 }
1006
1007 static void
1008 registry_handle_global_remove(void *data, struct wl_registry *registry,
1009                               uint32_t name)
1010 {
1011 }
1012
1013 static const struct wl_registry_listener registry_listener_drm = {
1014    .global = registry_handle_global_drm,
1015    .global_remove = registry_handle_global_remove
1016 };
1017
1018 static EGLBoolean
1019 dri2_wl_swap_interval(_EGLDriver *drv,
1020                    _EGLDisplay *disp,
1021                    _EGLSurface *surf,
1022                    EGLint interval)
1023 {
1024    if (interval > surf->Config->MaxSwapInterval)
1025       interval = surf->Config->MaxSwapInterval;
1026    else if (interval < surf->Config->MinSwapInterval)
1027       interval = surf->Config->MinSwapInterval;
1028
1029    surf->SwapInterval = interval;
1030
1031    return EGL_TRUE;
1032 }
1033
1034 static void
1035 dri2_wl_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1036 {
1037    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1038
1039    /* We can't use values greater than 1 on Wayland because we are using the
1040     * frame callback to synchronise the frame and the only way we be sure to
1041     * get a frame callback is to attach a new buffer. Therefore we can't just
1042     * sit drawing nothing to wait until the next ‘n’ frame callbacks */
1043
1044    if (dri2_dpy->config)
1045       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1046                                      "vblank_mode", &vblank_mode);
1047    switch (vblank_mode) {
1048    case DRI_CONF_VBLANK_NEVER:
1049       dri2_dpy->min_swap_interval = 0;
1050       dri2_dpy->max_swap_interval = 0;
1051       dri2_dpy->default_swap_interval = 0;
1052       break;
1053    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1054       dri2_dpy->min_swap_interval = 1;
1055       dri2_dpy->max_swap_interval = 1;
1056       dri2_dpy->default_swap_interval = 1;
1057       break;
1058    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1059       dri2_dpy->min_swap_interval = 0;
1060       dri2_dpy->max_swap_interval = 1;
1061       dri2_dpy->default_swap_interval = 0;
1062       break;
1063    default:
1064    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1065       dri2_dpy->min_swap_interval = 0;
1066       dri2_dpy->max_swap_interval = 1;
1067       dri2_dpy->default_swap_interval = 1;
1068       break;
1069    }
1070 }
1071
1072 static const struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
1073    .authenticate = dri2_wl_authenticate,
1074    .create_window_surface = dri2_wl_create_window_surface,
1075    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1076    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1077    .destroy_surface = dri2_wl_destroy_surface,
1078    .create_image = dri2_create_image_khr,
1079    .swap_interval = dri2_wl_swap_interval,
1080    .swap_buffers = dri2_wl_swap_buffers,
1081    .swap_buffers_with_damage = dri2_wl_swap_buffers_with_damage,
1082    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1083    .set_damage_region = dri2_fallback_set_damage_region,
1084    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1085    .copy_buffers = dri2_fallback_copy_buffers,
1086    .query_buffer_age = dri2_wl_query_buffer_age,
1087    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
1088    .get_sync_values = dri2_fallback_get_sync_values,
1089    .get_dri_drawable = dri2_surface_get_dri_drawable,
1090 };
1091
1092 static const __DRIextension *dri2_loader_extensions[] = {
1093    &dri2_loader_extension.base,
1094    &image_loader_extension.base,
1095    &image_lookup_extension.base,
1096    &use_invalidate.base,
1097    NULL,
1098 };
1099
1100 static const __DRIextension *image_loader_extensions[] = {
1101    &image_loader_extension.base,
1102    &image_lookup_extension.base,
1103    &use_invalidate.base,
1104    NULL,
1105 };
1106
1107 static EGLBoolean
1108 dri2_wl_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
1109 {
1110    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1111    static const struct {
1112       const char *format_name;
1113       int has_format;
1114       unsigned int rgba_masks[4];
1115    } visuals[] = {
1116       { "XRGB8888", HAS_XRGB8888, { 0xff0000, 0xff00, 0x00ff, 0xff000000 } },
1117       { "ARGB8888", HAS_ARGB8888, { 0xff0000, 0xff00, 0x00ff, 0 } },
1118       { "RGB565",   HAS_RGB565,   { 0x00f800, 0x07e0, 0x001f, 0 } },
1119    };
1120    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
1121    unsigned int count, i, j;
1122
1123    count = 0;
1124    for (i = 0; dri2_dpy->driver_configs[i]; i++) {
1125       for (j = 0; j < ARRAY_SIZE(visuals); j++) {
1126          struct dri2_egl_config *dri2_conf;
1127
1128          if (!(dri2_dpy->formats & visuals[j].has_format))
1129             continue;
1130
1131          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1132                count + 1, EGL_WINDOW_BIT, NULL, visuals[j].rgba_masks);
1133          if (dri2_conf) {
1134             if (dri2_conf->base.ConfigID == count + 1)
1135                count++;
1136             format_count[j]++;
1137          }
1138       }
1139    }
1140
1141    for (i = 0; i < ARRAY_SIZE(format_count); i++) {
1142       if (!format_count[i]) {
1143          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
1144                  visuals[i].format_name);
1145       }
1146    }
1147
1148    return (count != 0);
1149 }
1150
1151 static EGLBoolean
1152 dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
1153 {
1154    struct dri2_egl_display *dri2_dpy;
1155
1156    loader_set_logger(_eglLog);
1157
1158    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1159    if (!dri2_dpy)
1160       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1161
1162    dri2_dpy->fd = -1;
1163    disp->DriverData = (void *) dri2_dpy;
1164    if (disp->PlatformDisplay == NULL) {
1165       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1166       if (dri2_dpy->wl_dpy == NULL)
1167          goto cleanup;
1168       dri2_dpy->own_device = true;
1169    } else {
1170       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1171    }
1172
1173    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1174
1175    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1176    if (dri2_dpy->wl_dpy_wrapper == NULL)
1177       goto cleanup;
1178
1179    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1180                       dri2_dpy->wl_queue);
1181
1182    if (dri2_dpy->own_device)
1183       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1184
1185    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1186    wl_registry_add_listener(dri2_dpy->wl_registry,
1187                             &registry_listener_drm, dri2_dpy);
1188    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_drm == NULL)
1189       goto cleanup;
1190
1191    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->fd == -1)
1192       goto cleanup;
1193
1194    if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
1195       goto cleanup;
1196
1197    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
1198                                                &dri2_dpy->is_different_gpu);
1199    if (dri2_dpy->is_different_gpu) {
1200       free(dri2_dpy->device_name);
1201       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
1202       if (!dri2_dpy->device_name) {
1203          _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
1204                                   "for requested GPU");
1205          goto cleanup;
1206       }
1207    }
1208
1209    /* we have to do the check now, because loader_get_user_preferred_fd
1210     * will return a render-node when the requested gpu is different
1211     * to the server, but also if the client asks for the same gpu than
1212     * the server by requesting its pci-id */
1213    dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
1214
1215    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
1216    if (dri2_dpy->driver_name == NULL) {
1217       _eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
1218       goto cleanup;
1219    }
1220
1221    /* render nodes cannot use Gem names, and thus do not support
1222     * the __DRI_DRI2_LOADER extension */
1223    if (!dri2_dpy->is_render_node) {
1224       dri2_dpy->loader_extensions = dri2_loader_extensions;
1225       if (!dri2_load_driver(disp)) {
1226          _eglError(EGL_BAD_ALLOC, "DRI2: failed to load driver");
1227          goto cleanup;
1228       }
1229    } else {
1230       dri2_dpy->loader_extensions = image_loader_extensions;
1231       if (!dri2_load_driver_dri3(disp)) {
1232          _eglError(EGL_BAD_ALLOC, "DRI3: failed to load driver");
1233          goto cleanup;
1234       }
1235    }
1236
1237    if (!dri2_create_screen(disp))
1238       goto cleanup;
1239
1240    if (!dri2_setup_extensions(disp))
1241       goto cleanup;
1242
1243    dri2_setup_screen(disp);
1244
1245    dri2_wl_setup_swap_interval(dri2_dpy);
1246
1247    /* To use Prime, we must have _DRI_IMAGE v7 at least.
1248     * createImageFromFds support indicates that Prime export/import
1249     * is supported by the driver. Fall back to
1250     * gem names if we don't have Prime support. */
1251
1252    if (dri2_dpy->image->base.version < 7 ||
1253        dri2_dpy->image->createImageFromFds == NULL)
1254       dri2_dpy->capabilities &= ~WL_DRM_CAPABILITY_PRIME;
1255
1256    /* We cannot use Gem names with render-nodes, only prime fds (dma-buf).
1257     * The server needs to accept them */
1258    if (dri2_dpy->is_render_node &&
1259        !(dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME)) {
1260       _eglLog(_EGL_WARNING, "wayland-egl: display is not render-node capable");
1261       goto cleanup;
1262    }
1263
1264    if (dri2_dpy->is_different_gpu &&
1265        (dri2_dpy->image->base.version < 9 ||
1266         dri2_dpy->image->blitImage == NULL)) {
1267       _eglLog(_EGL_WARNING, "wayland-egl: Different GPU selected, but the "
1268                             "Image extension in the driver is not "
1269                             "compatible. Version 9 or later and blitImage() "
1270                             "are required");
1271       goto cleanup;
1272    }
1273
1274    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1275       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1276       goto cleanup;
1277    }
1278
1279    dri2_set_WL_bind_wayland_display(drv, disp);
1280    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
1281     * because the buffer of the EGLImage has likely a tiling mode the server
1282     * gpu won't support. These is no way to check for now. Thus do not support the
1283     * extension */
1284    if (!dri2_dpy->is_different_gpu)
1285       disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
1286
1287    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1288
1289    disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
1290
1291    /* Fill vtbl last to prevent accidentally calling virtual function during
1292     * initialization.
1293     */
1294    dri2_dpy->vtbl = &dri2_wl_display_vtbl;
1295
1296    return EGL_TRUE;
1297
1298  cleanup:
1299    dri2_display_destroy(disp);
1300    return EGL_FALSE;
1301 }
1302
1303 static int
1304 dri2_wl_swrast_get_stride_for_format(int format, int w)
1305 {
1306    if (format == WL_SHM_FORMAT_RGB565)
1307       return 2 * w;
1308    else /* ARGB8888 || XRGB8888 */
1309       return 4 * w;
1310 }
1311
1312 /*
1313  * Taken from weston shared/os-compatibility.c
1314  */
1315
1316 #ifndef HAVE_MKOSTEMP
1317
1318 static int
1319 set_cloexec_or_close(int fd)
1320 {
1321    long flags;
1322
1323    if (fd == -1)
1324       return -1;
1325
1326    flags = fcntl(fd, F_GETFD);
1327    if (flags == -1)
1328       goto err;
1329
1330    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
1331       goto err;
1332
1333    return fd;
1334
1335 err:
1336    close(fd);
1337    return -1;
1338 }
1339
1340 #endif
1341
1342 /*
1343  * Taken from weston shared/os-compatibility.c
1344  */
1345
1346 static int
1347 create_tmpfile_cloexec(char *tmpname)
1348 {
1349    int fd;
1350
1351 #ifdef HAVE_MKOSTEMP
1352    fd = mkostemp(tmpname, O_CLOEXEC);
1353    if (fd >= 0)
1354       unlink(tmpname);
1355 #else
1356    fd = mkstemp(tmpname);
1357    if (fd >= 0) {
1358       fd = set_cloexec_or_close(fd);
1359       unlink(tmpname);
1360    }
1361 #endif
1362
1363    return fd;
1364 }
1365
1366 /*
1367  * Taken from weston shared/os-compatibility.c
1368  *
1369  * Create a new, unique, anonymous file of the given size, and
1370  * return the file descriptor for it. The file descriptor is set
1371  * CLOEXEC. The file is immediately suitable for mmap()'ing
1372  * the given size at offset zero.
1373  *
1374  * The file should not have a permanent backing store like a disk,
1375  * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
1376  *
1377  * The file name is deleted from the file system.
1378  *
1379  * The file is suitable for buffer sharing between processes by
1380  * transmitting the file descriptor over Unix sockets using the
1381  * SCM_RIGHTS methods.
1382  *
1383  * If the C library implements posix_fallocate(), it is used to
1384  * guarantee that disk space is available for the file at the
1385  * given size. If disk space is insufficent, errno is set to ENOSPC.
1386  * If posix_fallocate() is not supported, program may receive
1387  * SIGBUS on accessing mmap()'ed file contents instead.
1388  */
1389 static int
1390 os_create_anonymous_file(off_t size)
1391 {
1392    static const char template[] = "/mesa-shared-XXXXXX";
1393    const char *path;
1394    char *name;
1395    int fd;
1396    int ret;
1397
1398    path = getenv("XDG_RUNTIME_DIR");
1399    if (!path) {
1400       errno = ENOENT;
1401       return -1;
1402    }
1403
1404    name = malloc(strlen(path) + sizeof(template));
1405    if (!name)
1406       return -1;
1407
1408    strcpy(name, path);
1409    strcat(name, template);
1410
1411    fd = create_tmpfile_cloexec(name);
1412
1413    free(name);
1414
1415    if (fd < 0)
1416       return -1;
1417
1418    ret = ftruncate(fd, size);
1419    if (ret < 0) {
1420       close(fd);
1421       return -1;
1422    }
1423
1424    return fd;
1425 }
1426
1427
1428 static EGLBoolean
1429 dri2_wl_swrast_allocate_buffer(struct dri2_egl_surface *dri2_surf,
1430                                int format, int w, int h,
1431                                void **data, int *size,
1432                                struct wl_buffer **buffer)
1433 {
1434    struct dri2_egl_display *dri2_dpy =
1435       dri2_egl_display(dri2_surf->base.Resource.Display);
1436    struct wl_shm_pool *pool;
1437    int fd, stride, size_map;
1438    void *data_map;
1439
1440    stride = dri2_wl_swrast_get_stride_for_format(format, w);
1441    size_map = h * stride;
1442
1443    /* Create a sharable buffer */
1444    fd = os_create_anonymous_file(size_map);
1445    if (fd < 0)
1446       return EGL_FALSE;
1447
1448    data_map = mmap(NULL, size_map, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1449    if (data_map == MAP_FAILED) {
1450       close(fd);
1451       return EGL_FALSE;
1452    }
1453
1454    /* Share it in a wl_buffer */
1455    pool = wl_shm_create_pool(dri2_dpy->wl_shm, fd, size_map);
1456    wl_proxy_set_queue((struct wl_proxy *)pool, dri2_surf->wl_queue);
1457    *buffer = wl_shm_pool_create_buffer(pool, 0, w, h, stride, format);
1458    wl_shm_pool_destroy(pool);
1459    close(fd);
1460
1461    *data = data_map;
1462    *size = size_map;
1463    return EGL_TRUE;
1464 }
1465
1466 static int
1467 swrast_update_buffers(struct dri2_egl_surface *dri2_surf)
1468 {
1469    struct dri2_egl_display *dri2_dpy =
1470       dri2_egl_display(dri2_surf->base.Resource.Display);
1471    int i;
1472
1473    /* we need to do the following operations only once per frame */
1474    if (dri2_surf->back)
1475       return 0;
1476
1477    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
1478        dri2_surf->base.Height != dri2_surf->wl_win->height) {
1479
1480       dri2_wl_release_buffers(dri2_surf);
1481
1482       dri2_surf->base.Width  = dri2_surf->wl_win->width;
1483       dri2_surf->base.Height = dri2_surf->wl_win->height;
1484       dri2_surf->dx = dri2_surf->wl_win->dx;
1485       dri2_surf->dy = dri2_surf->wl_win->dy;
1486       dri2_surf->current = NULL;
1487    }
1488
1489    /* find back buffer */
1490
1491    /* There might be a buffer release already queued that wasn't processed */
1492    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
1493
1494    /* try get free buffer already created */
1495    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1496       if (!dri2_surf->color_buffers[i].locked &&
1497           dri2_surf->color_buffers[i].wl_buffer) {
1498           dri2_surf->back = &dri2_surf->color_buffers[i];
1499           break;
1500       }
1501    }
1502
1503    /* else choose any another free location */
1504    if (!dri2_surf->back) {
1505       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1506          if (!dri2_surf->color_buffers[i].locked) {
1507              dri2_surf->back = &dri2_surf->color_buffers[i];
1508              if (!dri2_wl_swrast_allocate_buffer(dri2_surf,
1509                                                  dri2_surf->format,
1510                                                  dri2_surf->base.Width,
1511                                                  dri2_surf->base.Height,
1512                                                  &dri2_surf->back->data,
1513                                                  &dri2_surf->back->data_size,
1514                                                  &dri2_surf->back->wl_buffer)) {
1515                 _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
1516                  return -1;
1517              }
1518              wl_buffer_add_listener(dri2_surf->back->wl_buffer,
1519                                     &wl_buffer_listener, dri2_surf);
1520              break;
1521          }
1522       }
1523    }
1524
1525    if (!dri2_surf->back) {
1526       _eglError(EGL_BAD_ALLOC, "failed to find free buffer");
1527       return -1;
1528    }
1529
1530    dri2_surf->back->locked = true;
1531
1532    /* If we have an extra unlocked buffer at this point, we had to do triple
1533     * buffering for a while, but now can go back to just double buffering.
1534     * That means we can free any unlocked buffer now. */
1535    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1536       if (!dri2_surf->color_buffers[i].locked &&
1537           dri2_surf->color_buffers[i].wl_buffer) {
1538          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
1539          munmap(dri2_surf->color_buffers[i].data,
1540                 dri2_surf->color_buffers[i].data_size);
1541          dri2_surf->color_buffers[i].wl_buffer = NULL;
1542          dri2_surf->color_buffers[i].data = NULL;
1543       }
1544    }
1545
1546    return 0;
1547 }
1548
1549 static void*
1550 dri2_wl_swrast_get_frontbuffer_data(struct dri2_egl_surface *dri2_surf)
1551 {
1552    /* if there has been a resize: */
1553    if (!dri2_surf->current)
1554       return NULL;
1555
1556    return dri2_surf->current->data;
1557 }
1558
1559 static void*
1560 dri2_wl_swrast_get_backbuffer_data(struct dri2_egl_surface *dri2_surf)
1561 {
1562    assert(dri2_surf->back);
1563    return dri2_surf->back->data;
1564 }
1565
1566 static void
1567 dri2_wl_swrast_commit_backbuffer(struct dri2_egl_surface *dri2_surf)
1568 {
1569    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
1570
1571    while (dri2_surf->throttle_callback != NULL)
1572       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1573                                     dri2_surf->wl_queue) == -1)
1574          return;
1575
1576    if (dri2_surf->base.SwapInterval > 0) {
1577       dri2_surf->throttle_callback =
1578          wl_surface_frame(dri2_surf->wl_surface_wrapper);
1579       wl_callback_add_listener(dri2_surf->throttle_callback,
1580                                &throttle_listener, dri2_surf);
1581    }
1582
1583    dri2_surf->current = dri2_surf->back;
1584    dri2_surf->back = NULL;
1585
1586    wl_surface_attach(dri2_surf->wl_surface_wrapper,
1587                      dri2_surf->current->wl_buffer,
1588                      dri2_surf->dx, dri2_surf->dy);
1589
1590    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1591    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1592    /* reset resize growing parameters */
1593    dri2_surf->dx = 0;
1594    dri2_surf->dy = 0;
1595
1596    wl_surface_damage(dri2_surf->wl_surface_wrapper,
1597                      0, 0, INT32_MAX, INT32_MAX);
1598    wl_surface_commit(dri2_surf->wl_surface_wrapper);
1599
1600    /* If we're not waiting for a frame callback then we'll at least throttle
1601     * to a sync callback so that we always give a chance for the compositor to
1602     * handle the commit and send a release event before checking for a free
1603     * buffer */
1604    if (dri2_surf->throttle_callback == NULL) {
1605       dri2_surf->throttle_callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
1606       wl_callback_add_listener(dri2_surf->throttle_callback,
1607                                &throttle_listener, dri2_surf);
1608    }
1609
1610    wl_display_flush(dri2_dpy->wl_dpy);
1611 }
1612
1613 static void
1614 dri2_wl_swrast_get_drawable_info(__DRIdrawable * draw,
1615                                  int *x, int *y, int *w, int *h,
1616                                  void *loaderPrivate)
1617 {
1618    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1619
1620    (void) swrast_update_buffers(dri2_surf);
1621    *x = 0;
1622    *y = 0;
1623    *w = dri2_surf->base.Width;
1624    *h = dri2_surf->base.Height;
1625 }
1626
1627 static void
1628 dri2_wl_swrast_get_image(__DRIdrawable * read,
1629                          int x, int y, int w, int h,
1630                          char *data, void *loaderPrivate)
1631 {
1632    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1633    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1634    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1635    int src_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1636    int dst_stride = copy_width;
1637    char *src, *dst;
1638
1639    src = dri2_wl_swrast_get_frontbuffer_data(dri2_surf);
1640    if (!src) {
1641       memset(data, 0, copy_width * h);
1642       return;
1643    }
1644
1645    assert(data != src);
1646    assert(copy_width <= src_stride);
1647
1648    src += x_offset;
1649    src += y * src_stride;
1650    dst = data;
1651
1652    if (copy_width > src_stride-x_offset)
1653       copy_width = src_stride-x_offset;
1654    if (h > dri2_surf->base.Height-y)
1655       h = dri2_surf->base.Height-y;
1656
1657    for (; h>0; h--) {
1658       memcpy(dst, src, copy_width);
1659       src += src_stride;
1660       dst += dst_stride;
1661    }
1662 }
1663
1664 static void
1665 dri2_wl_swrast_put_image2(__DRIdrawable * draw, int op,
1666                          int x, int y, int w, int h, int stride,
1667                          char *data, void *loaderPrivate)
1668 {
1669    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1670    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1671    int dst_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1672    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1673    char *src, *dst;
1674
1675    assert(copy_width <= stride);
1676
1677    (void) swrast_update_buffers(dri2_surf);
1678    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
1679
1680    /* partial copy, copy old content */
1681    if (copy_width < dst_stride)
1682       dri2_wl_swrast_get_image(draw, 0, 0,
1683                                dri2_surf->base.Width, dri2_surf->base.Height,
1684                                dst, loaderPrivate);
1685
1686    dst += x_offset;
1687    dst += y * dst_stride;
1688
1689    src = data;
1690
1691    /* drivers expect we do these checks (and some rely on it) */
1692    if (copy_width > dst_stride-x_offset)
1693       copy_width = dst_stride-x_offset;
1694    if (h > dri2_surf->base.Height-y)
1695       h = dri2_surf->base.Height-y;
1696
1697    for (; h>0; h--) {
1698       memcpy(dst, src, copy_width);
1699       src += stride;
1700       dst += dst_stride;
1701    }
1702    dri2_wl_swrast_commit_backbuffer(dri2_surf);
1703 }
1704
1705 static void
1706 dri2_wl_swrast_put_image(__DRIdrawable * draw, int op,
1707                          int x, int y, int w, int h,
1708                          char *data, void *loaderPrivate)
1709 {
1710    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1711    int stride;
1712
1713    stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1714    dri2_wl_swrast_put_image2(draw, op, x, y, w, h,
1715                              stride, data, loaderPrivate);
1716 }
1717
1718 static EGLBoolean
1719 dri2_wl_swrast_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1720 {
1721    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1722    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1723
1724    dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1725    return EGL_TRUE;
1726 }
1727
1728 static void
1729 shm_handle_format(void *data, struct wl_shm *shm, uint32_t format)
1730 {
1731    struct dri2_egl_display *dri2_dpy = data;
1732
1733    switch (format) {
1734    case WL_SHM_FORMAT_ARGB8888:
1735       dri2_dpy->formats |= HAS_ARGB8888;
1736       break;
1737    case WL_SHM_FORMAT_XRGB8888:
1738       dri2_dpy->formats |= HAS_XRGB8888;
1739       break;
1740    case WL_SHM_FORMAT_RGB565:
1741       dri2_dpy->formats |= HAS_RGB565;
1742       break;
1743    }
1744 }
1745
1746 static const struct wl_shm_listener shm_listener = {
1747    .format = shm_handle_format
1748 };
1749
1750 static void
1751 registry_handle_global_swrast(void *data, struct wl_registry *registry, uint32_t name,
1752                               const char *interface, uint32_t version)
1753 {
1754    struct dri2_egl_display *dri2_dpy = data;
1755
1756    if (strcmp(interface, "wl_shm") == 0) {
1757       dri2_dpy->wl_shm =
1758          wl_registry_bind(registry, name, &wl_shm_interface, 1);
1759       wl_shm_add_listener(dri2_dpy->wl_shm, &shm_listener, dri2_dpy);
1760    }
1761 }
1762
1763 static const struct wl_registry_listener registry_listener_swrast = {
1764    .global = registry_handle_global_swrast,
1765    .global_remove = registry_handle_global_remove
1766 };
1767
1768 static const struct dri2_egl_display_vtbl dri2_wl_swrast_display_vtbl = {
1769    .authenticate = NULL,
1770    .create_window_surface = dri2_wl_create_window_surface,
1771    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1772    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1773    .destroy_surface = dri2_wl_destroy_surface,
1774    .create_image = dri2_fallback_create_image_khr,
1775    .swap_interval = dri2_wl_swap_interval,
1776    .swap_buffers = dri2_wl_swrast_swap_buffers,
1777    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1778    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1779    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1780    .copy_buffers = dri2_fallback_copy_buffers,
1781    .query_buffer_age = dri2_fallback_query_buffer_age,
1782    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1783    .get_sync_values = dri2_fallback_get_sync_values,
1784    .get_dri_drawable = dri2_surface_get_dri_drawable,
1785 };
1786
1787 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1788    .base = { __DRI_SWRAST_LOADER, 2 },
1789
1790    .getDrawableInfo = dri2_wl_swrast_get_drawable_info,
1791    .putImage        = dri2_wl_swrast_put_image,
1792    .getImage        = dri2_wl_swrast_get_image,
1793    .putImage2       = dri2_wl_swrast_put_image2,
1794 };
1795
1796 static const __DRIextension *swrast_loader_extensions[] = {
1797    &swrast_loader_extension.base,
1798    NULL,
1799 };
1800
1801 static EGLBoolean
1802 dri2_initialize_wayland_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1803 {
1804    struct dri2_egl_display *dri2_dpy;
1805
1806    loader_set_logger(_eglLog);
1807
1808    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1809    if (!dri2_dpy)
1810       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1811
1812    dri2_dpy->fd = -1;
1813    disp->DriverData = (void *) dri2_dpy;
1814    if (disp->PlatformDisplay == NULL) {
1815       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1816       if (dri2_dpy->wl_dpy == NULL)
1817          goto cleanup;
1818       dri2_dpy->own_device = true;
1819    } else {
1820       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1821    }
1822
1823    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1824
1825    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1826    if (dri2_dpy->wl_dpy_wrapper == NULL)
1827       goto cleanup;
1828
1829    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1830                       dri2_dpy->wl_queue);
1831
1832    if (dri2_dpy->own_device)
1833       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1834
1835    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1836    wl_registry_add_listener(dri2_dpy->wl_registry,
1837                             &registry_listener_swrast, dri2_dpy);
1838
1839    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_shm == NULL)
1840       goto cleanup;
1841
1842    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->formats == 0)
1843       goto cleanup;
1844
1845    dri2_dpy->driver_name = strdup("swrast");
1846    if (!dri2_load_driver_swrast(disp))
1847       goto cleanup;
1848
1849    dri2_dpy->loader_extensions = swrast_loader_extensions;
1850
1851    if (!dri2_create_screen(disp))
1852       goto cleanup;
1853
1854    if (!dri2_setup_extensions(disp))
1855       goto cleanup;
1856
1857    dri2_setup_screen(disp);
1858
1859    dri2_wl_setup_swap_interval(dri2_dpy);
1860
1861    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1862       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1863       goto cleanup;
1864    }
1865
1866    /* Fill vtbl last to prevent accidentally calling virtual function during
1867     * initialization.
1868     */
1869    dri2_dpy->vtbl = &dri2_wl_swrast_display_vtbl;
1870
1871    return EGL_TRUE;
1872
1873  cleanup:
1874    dri2_display_destroy(disp);
1875    return EGL_FALSE;
1876 }
1877
1878 EGLBoolean
1879 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
1880 {
1881    EGLBoolean initialized = EGL_TRUE;
1882
1883    int hw_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1884
1885    if (hw_accel) {
1886       if (!dri2_initialize_wayland_drm(drv, disp)) {
1887          initialized = dri2_initialize_wayland_swrast(drv, disp);
1888       }
1889    } else {
1890       initialized = dri2_initialize_wayland_swrast(drv, disp);
1891    }
1892
1893    return initialized;
1894
1895 }