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 void
  59 sync_callback(void *data, struct wl_callback *callback, uint32_t serial)
  60 {
  61    int *done = data;
  62
  63    *done = 1;
  64    wl_callback_destroy(callback);
  65 }
  66
  67 static const struct wl_callback_listener sync_listener = {
  68    .done = sync_callback
  69 };
  70
  71 static int
  72 roundtrip(struct dri2_egl_display *dri2_dpy)
  73 {
  74    struct wl_callback *callback;
  75    int done = 0, ret = 0;
  76
  77    callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
  78    wl_callback_add_listener(callback, &sync_listener, &done);
  79    while (ret != -1 && !done)
  80       ret = wl_display_dispatch_queue(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
  81
  82    if (!done)
  83       wl_callback_destroy(callback);
  84
  85    return ret;
  86 }
  87
  88 static void
  89 wl_buffer_release(void *data, struct wl_buffer *buffer)
  90 {
  91    struct dri2_egl_surface *dri2_surf = data;
  92    int i;
  93
  94    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); ++i)
  95       if (dri2_surf->color_buffers[i].wl_buffer == buffer)
  96          break;
  97
  98    if (i == ARRAY_SIZE(dri2_surf->color_buffers)) {
  99       wl_buffer_destroy(buffer);
 100       return;
 101    }
 102
 103    dri2_surf->color_buffers[i].locked = 0;
 104 }
 105
 106 static const struct wl_buffer_listener wl_buffer_listener = {
 107    .release = wl_buffer_release
 108 };
 109
 110 static void
 111 resize_callback(struct wl_egl_window *wl_win, void *data)
 112 {
 113    struct dri2_egl_surface *dri2_surf = data;
 114    struct dri2_egl_display *dri2_dpy =
 115       dri2_egl_display(dri2_surf->base.Resource.Display);
 116
 117    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 118 }
 119
 120 static void
 121 destroy_window_callback(void *data)
 122 {
 123    struct dri2_egl_surface *dri2_surf = data;
 124    dri2_surf->wl_win = NULL;
 125 }
 126
 127 /**
 128  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 129  */
 130 static _EGLSurface *
 131 dri2_wl_create_surface(_EGLDriver *drv, _EGLDisplay *disp,
 132                        _EGLConfig *conf, void *native_window,
 133                        const EGLint *attrib_list)
 134 {
 135    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 136    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 137    struct wl_egl_window *window = native_window;
 138    struct dri2_egl_surface *dri2_surf;
 139    const __DRIconfig *config;
 140
 141    (void) drv;
 142
 143    dri2_surf = calloc(1, sizeof *dri2_surf);
 144    if (!dri2_surf) {
 145       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 146       return NULL;
 147    }
 148
 149    if (!_eglInitSurface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list))
 150       goto cleanup_surf;
 151
 152    if (conf->RedSize == 5)
 153       dri2_surf->format = WL_DRM_FORMAT_RGB565;
 154    else if (conf->AlphaSize == 0)
 155       dri2_surf->format = WL_DRM_FORMAT_XRGB8888;
 156    else
 157       dri2_surf->format = WL_DRM_FORMAT_ARGB8888;
 158
 159    if (!window) {
 160       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 161       goto cleanup_surf;
 162    }
 163
 164    dri2_surf->wl_win = window;
 165
 166    dri2_surf->wl_win->private = dri2_surf;
 167    dri2_surf->wl_win->resize_callback = resize_callback;
 168    dri2_surf->wl_win->destroy_window_callback = destroy_window_callback;
 169
 170    dri2_surf->base.Width =  -1;
 171    dri2_surf->base.Height = -1;
 172
 173    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 174                                 dri2_surf->base.GLColorspace);
 175
 176    dri2_surf->dri_drawable =
 177       dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 178                                         dri2_surf);
 179    if (dri2_surf->dri_drawable == NULL) {
 180       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 181       goto cleanup_surf;
 182    }
 183
 184    return &dri2_surf->base;
 185
 186  cleanup_surf:
 187    free(dri2_surf);
 188
 189    return NULL;
 190 }
 191
 192 /**
 193  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 194  */
 195 static _EGLSurface *
 196 dri2_wl_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 197                               _EGLConfig *conf, void *native_window,
 198                               const EGLint *attrib_list)
 199 {
 200    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 201    _EGLSurface *surf;
 202
 203    surf = dri2_wl_create_surface(drv, disp, conf, native_window, attrib_list);
 204
 205    if (surf != NULL)
 206       dri2_wl_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 207
 208    return surf;
 209 }
 210
 211 static _EGLSurface *
 212 dri2_wl_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 213                               _EGLConfig *conf, void *native_window,
 214                               const EGLint *attrib_list)
 215 {
 216    /* From the EGL_EXT_platform_wayland spec, version 3:
 217     *
 218     *   It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 219     *   that belongs to Wayland. Any such call fails and generates
 220     *   EGL_BAD_PARAMETER.
 221     */
 222    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on "
 223              "Wayland");
 224    return NULL;
 225 }
 226
 227 /**
 228  * Called via eglDestroySurface(), drv->API.DestroySurface().
 229  */
 230 static EGLBoolean
 231 dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 232 {
 233    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 234    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 235    int i;
 236
 237    (void) drv;
 238
 239    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 240
 241    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 242       if (dri2_surf->color_buffers[i].wl_buffer)
 243          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 244       if (dri2_surf->color_buffers[i].dri_image)
 245          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 246       if (dri2_surf->color_buffers[i].linear_copy)
 247          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 248       if (dri2_surf->color_buffers[i].data)
 249          munmap(dri2_surf->color_buffers[i].data,
 250                 dri2_surf->color_buffers[i].data_size);
 251    }
 252
 253    if (dri2_dpy->dri2) {
 254       for (i = 0; i < __DRI_BUFFER_COUNT; i++)
 255          if (dri2_surf->dri_buffers[i] &&
 256              dri2_surf->dri_buffers[i]->attachment != __DRI_BUFFER_BACK_LEFT)
 257             dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 258                                           dri2_surf->dri_buffers[i]);
 259    }
 260
 261    if (dri2_surf->throttle_callback)
 262       wl_callback_destroy(dri2_surf->throttle_callback);
 263
 264    if (dri2_surf->wl_win) {
 265       dri2_surf->wl_win->private = NULL;
 266       dri2_surf->wl_win->resize_callback = NULL;
 267       dri2_surf->wl_win->destroy_window_callback = NULL;
 268    }
 269
 270    free(surf);
 271
 272    return EGL_TRUE;
 273 }
 274
 275 static void
 276 dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
 277 {
 278    struct dri2_egl_display *dri2_dpy =
 279       dri2_egl_display(dri2_surf->base.Resource.Display);
 280    int i;
 281
 282    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 283       if (dri2_surf->color_buffers[i].wl_buffer &&
 284           !dri2_surf->color_buffers[i].locked)
 285          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 286       if (dri2_surf->color_buffers[i].dri_image)
 287          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 288       if (dri2_surf->color_buffers[i].linear_copy)
 289          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 290       if (dri2_surf->color_buffers[i].data)
 291          munmap(dri2_surf->color_buffers[i].data,
 292                 dri2_surf->color_buffers[i].data_size);
 293
 294       dri2_surf->color_buffers[i].wl_buffer = NULL;
 295       dri2_surf->color_buffers[i].dri_image = NULL;
 296       dri2_surf->color_buffers[i].linear_copy = NULL;
 297       dri2_surf->color_buffers[i].data = NULL;
 298       dri2_surf->color_buffers[i].locked = 0;
 299    }
 300
 301    if (dri2_dpy->dri2) {
 302       for (i = 0; i < __DRI_BUFFER_COUNT; i++)
 303          if (dri2_surf->dri_buffers[i] &&
 304              dri2_surf->dri_buffers[i]->attachment != __DRI_BUFFER_BACK_LEFT)
 305             dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 306                                           dri2_surf->dri_buffers[i]);
 307    }
 308 }
 309
 310 static int
 311 get_back_bo(struct dri2_egl_surface *dri2_surf)
 312 {
 313    struct dri2_egl_display *dri2_dpy =
 314       dri2_egl_display(dri2_surf->base.Resource.Display);
 315    int i, use_flags;
 316    unsigned int dri_image_format;
 317
 318    /* currently supports three WL DRM formats,
 319     * WL_DRM_FORMAT_ARGB8888, WL_DRM_FORMAT_XRGB8888,
 320     * and WL_DRM_FORMAT_RGB565
 321     */
 322    switch (dri2_surf->format) {
 323    case WL_DRM_FORMAT_ARGB8888:
 324       dri_image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 325       break;
 326    case WL_DRM_FORMAT_XRGB8888:
 327       dri_image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 328       break;
 329    case WL_DRM_FORMAT_RGB565:
 330       dri_image_format = __DRI_IMAGE_FORMAT_RGB565;
 331       break;
 332    default:
 333       /* format is not supported */
 334       return -1;
 335    }
 336
 337    /* There might be a buffer release already queued that wasn't processed */
 338    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
 339
 340    if (dri2_surf->back == NULL) {
 341       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 342          /* Get an unlocked buffer, preferrably one with a dri_buffer
 343           * already allocated. */
 344          if (dri2_surf->color_buffers[i].locked)
 345             continue;
 346          if (dri2_surf->back == NULL)
 347             dri2_surf->back = &dri2_surf->color_buffers[i];
 348          else if (dri2_surf->back->dri_image == NULL)
 349             dri2_surf->back = &dri2_surf->color_buffers[i];
 350       }
 351    }
 352
 353    if (dri2_surf->back == NULL)
 354       return -1;
 355
 356    use_flags = __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_BACKBUFFER;
 357
 358    if (dri2_dpy->is_different_gpu &&
 359        dri2_surf->back->linear_copy == NULL) {
 360        dri2_surf->back->linear_copy =
 361           dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 362                                       dri2_surf->base.Width,
 363                                       dri2_surf->base.Height,
 364                                       dri_image_format,
 365                                       use_flags |
 366                                       __DRI_IMAGE_USE_LINEAR,
 367                                       NULL);
 368       if (dri2_surf->back->linear_copy == NULL)
 369           return -1;
 370    }
 371
 372    if (dri2_surf->back->dri_image == NULL) {
 373       dri2_surf->back->dri_image =
 374          dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 375                                       dri2_surf->base.Width,
 376                                       dri2_surf->base.Height,
 377                                       dri_image_format,
 378                                       dri2_dpy->is_different_gpu ?
 379                                          0 : use_flags,
 380                                       NULL);
 381       dri2_surf->back->age = 0;
 382    }
 383    if (dri2_surf->back->dri_image == NULL)
 384       return -1;
 385
 386    dri2_surf->back->locked = 1;
 387
 388    return 0;
 389 }
 390
 391
 392 static void
 393 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 394 {
 395    struct dri2_egl_display *dri2_dpy =
 396       dri2_egl_display(dri2_surf->base.Resource.Display);
 397    __DRIimage *image;
 398    int name, pitch;
 399
 400    image = dri2_surf->back->dri_image;
 401
 402    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 403    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 404
 405    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 406    buffer->name = name;
 407    buffer->pitch = pitch;
 408    buffer->cpp = 4;
 409    buffer->flags = 0;
 410 }
 411
 412 static int
 413 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 414            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 415 {
 416    struct dri2_egl_display *dri2_dpy =
 417       dri2_egl_display(dri2_surf->base.Resource.Display);
 418    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 419
 420    if (b == NULL) {
 421       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 422                                          attachment, format,
 423                                          dri2_surf->base.Width,
 424                                          dri2_surf->base.Height);
 425       dri2_surf->dri_buffers[attachment] = b;
 426    }
 427    if (b == NULL)
 428       return -1;
 429
 430    memcpy(buffer, b, sizeof *buffer);
 431
 432    return 0;
 433 }
 434
 435 static int
 436 update_buffers(struct dri2_egl_surface *dri2_surf)
 437 {
 438    struct dri2_egl_display *dri2_dpy =
 439       dri2_egl_display(dri2_surf->base.Resource.Display);
 440    int i;
 441
 442    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
 443        dri2_surf->base.Height != dri2_surf->wl_win->height) {
 444
 445       dri2_wl_release_buffers(dri2_surf);
 446
 447       dri2_surf->base.Width  = dri2_surf->wl_win->width;
 448       dri2_surf->base.Height = dri2_surf->wl_win->height;
 449       dri2_surf->dx = dri2_surf->wl_win->dx;
 450       dri2_surf->dy = dri2_surf->wl_win->dy;
 451    }
 452
 453    if (get_back_bo(dri2_surf) < 0) {
 454       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 455       return -1;
 456    }
 457
 458    /* If we have an extra unlocked buffer at this point, we had to do triple
 459     * buffering for a while, but now can go back to just double buffering.
 460     * That means we can free any unlocked buffer now. */
 461    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 462       if (!dri2_surf->color_buffers[i].locked &&
 463           dri2_surf->color_buffers[i].wl_buffer) {
 464          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 465          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 466          if (dri2_dpy->is_different_gpu)
 467             dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 468          dri2_surf->color_buffers[i].wl_buffer = NULL;
 469          dri2_surf->color_buffers[i].dri_image = NULL;
 470          dri2_surf->color_buffers[i].linear_copy = NULL;
 471       }
 472    }
 473
 474    return 0;
 475 }
 476
 477 static __DRIbuffer *
 478 dri2_wl_get_buffers_with_format(__DRIdrawable * driDrawable,
 479                                 int *width, int *height,
 480                                 unsigned int *attachments, int count,
 481                                 int *out_count, void *loaderPrivate)
 482 {
 483    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 484    int i, j;
 485
 486    if (update_buffers(dri2_surf) < 0)
 487       return NULL;
 488
 489    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 490       switch (attachments[i]) {
 491       case __DRI_BUFFER_BACK_LEFT:
 492          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 493          break;
 494       default:
 495          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 496                         &dri2_surf->buffers[j]) < 0) {
 497             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 498             return NULL;
 499          }
 500          break;
 501       }
 502    }
 503
 504    *out_count = j;
 505    if (j == 0)
 506            return NULL;
 507
 508    *width = dri2_surf->base.Width;
 509    *height = dri2_surf->base.Height;
 510
 511    return dri2_surf->buffers;
 512 }
 513
 514 static __DRIbuffer *
 515 dri2_wl_get_buffers(__DRIdrawable * driDrawable,
 516                     int *width, int *height,
 517                     unsigned int *attachments, int count,
 518                     int *out_count, void *loaderPrivate)
 519 {
 520    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 521    unsigned int *attachments_with_format;
 522    __DRIbuffer *buffer;
 523    unsigned int bpp;
 524
 525    int i;
 526
 527    switch (dri2_surf->format) {
 528    case WL_DRM_FORMAT_ARGB8888:
 529    case WL_DRM_FORMAT_XRGB8888:
 530       bpp = 32;
 531       break;
 532    case WL_DRM_FORMAT_RGB565:
 533       bpp = 16;
 534       break;
 535    default:
 536       /* format is not supported */
 537       return NULL;
 538    }
 539
 540    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 541    if (!attachments_with_format) {
 542       *out_count = 0;
 543       return NULL;
 544    }
 545
 546    for (i = 0; i < count; ++i) {
 547       attachments_with_format[2*i] = attachments[i];
 548       attachments_with_format[2*i + 1] = bpp;
 549    }
 550
 551    buffer =
 552       dri2_wl_get_buffers_with_format(driDrawable,
 553                                       width, height,
 554                                       attachments_with_format, count,
 555                                       out_count, loaderPrivate);
 556
 557    free(attachments_with_format);
 558
 559    return buffer;
 560 }
 561
 562 static int
 563 image_get_buffers(__DRIdrawable *driDrawable,
 564                   unsigned int format,
 565                   uint32_t *stamp,
 566                   void *loaderPrivate,
 567                   uint32_t buffer_mask,
 568                   struct __DRIimageList *buffers)
 569 {
 570    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 571
 572    if (update_buffers(dri2_surf) < 0)
 573       return 0;
 574
 575    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 576    buffers->back = dri2_surf->back->dri_image;
 577
 578    return 1;
 579 }
 580
 581 static void
 582 dri2_wl_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 583 {
 584    (void) driDrawable;
 585    (void) loaderPrivate;
 586 }
 587
 588 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 589    .base = { __DRI_DRI2_LOADER, 3 },
 590
 591    .getBuffers           = dri2_wl_get_buffers,
 592    .flushFrontBuffer     = dri2_wl_flush_front_buffer,
 593    .getBuffersWithFormat = dri2_wl_get_buffers_with_format,
 594 };
 595
 596 static const __DRIimageLoaderExtension image_loader_extension = {
 597    .base = { __DRI_IMAGE_LOADER, 1 },
 598
 599    .getBuffers          = image_get_buffers,
 600    .flushFrontBuffer    = dri2_wl_flush_front_buffer,
 601 };
 602
 603 static void
 604 wayland_throttle_callback(void *data,
 605                           struct wl_callback *callback,
 606                           uint32_t time)
 607 {
 608    struct dri2_egl_surface *dri2_surf = data;
 609
 610    dri2_surf->throttle_callback = NULL;
 611    wl_callback_destroy(callback);
 612 }
 613
 614 static const struct wl_callback_listener throttle_listener = {
 615    .done = wayland_throttle_callback
 616 };
 617
 618 static void
 619 create_wl_buffer(struct dri2_egl_surface *dri2_surf)
 620 {
 621    struct dri2_egl_display *dri2_dpy =
 622       dri2_egl_display(dri2_surf->base.Resource.Display);
 623    __DRIimage *image;
 624    int fd, stride, name;
 625
 626    if (dri2_surf->current->wl_buffer != NULL)
 627       return;
 628
 629    if (dri2_dpy->is_different_gpu) {
 630       image = dri2_surf->current->linear_copy;
 631    } else {
 632       image = dri2_surf->current->dri_image;
 633    }
 634    if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 635       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 636       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 637
 638       dri2_surf->current->wl_buffer =
 639          wl_drm_create_prime_buffer(dri2_dpy->wl_drm,
 640                                     fd,
 641                                     dri2_surf->base.Width,
 642                                     dri2_surf->base.Height,
 643                                     dri2_surf->format,
 644                                     0, stride,
 645                                     0, 0,
 646                                     0, 0);
 647       close(fd);
 648    } else {
 649       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 650       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 651
 652       dri2_surf->current->wl_buffer =
 653          wl_drm_create_buffer(dri2_dpy->wl_drm,
 654                               name,
 655                               dri2_surf->base.Width,
 656                               dri2_surf->base.Height,
 657                               stride,
 658                               dri2_surf->format);
 659    }
 660
 661    wl_proxy_set_queue((struct wl_proxy *) dri2_surf->current->wl_buffer,
 662                       dri2_dpy->wl_queue);
 663    wl_buffer_add_listener(dri2_surf->current->wl_buffer,
 664                           &wl_buffer_listener, dri2_surf);
 665 }
 666
 667 static EGLBoolean
 668 try_damage_buffer(struct dri2_egl_surface *dri2_surf,
 669                   const EGLint *rects,
 670                   EGLint n_rects)
 671 {
 672 /* The WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION macro and
 673  * wl_proxy_get_version() were both introduced in wayland 1.10.
 674  * Instead of bumping our wayland dependency we just make this
 675  * function conditional on the required 1.10 features, falling
 676  * back to old (correct but suboptimal) behaviour for older
 677  * wayland.
 678  */
 679 #ifdef WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION
 680    int i;
 681
 682    if (wl_proxy_get_version((struct wl_proxy *) dri2_surf->wl_win->surface)
 683        < WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION)
 684       return EGL_FALSE;
 685
 686    for (i = 0; i < n_rects; i++) {
 687       const int *rect = &rects[i * 4];
 688
 689       wl_surface_damage_buffer(dri2_surf->wl_win->surface,
 690                                rect[0],
 691                                dri2_surf->base.Height - rect[1] - rect[3],
 692                                rect[2], rect[3]);
 693    }
 694    return EGL_TRUE;
 695 #endif
 696    return EGL_FALSE;
 697 }
 698 /**
 699  * Called via eglSwapBuffers(), drv->API.SwapBuffers().
 700  */
 701 static EGLBoolean
 702 dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
 703                                  _EGLDisplay *disp,
 704                                  _EGLSurface *draw,
 705                                  const EGLint *rects,
 706                                  EGLint n_rects)
 707 {
 708    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 709    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 710    int i;
 711
 712    while (dri2_surf->throttle_callback != NULL)
 713       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
 714                                     dri2_dpy->wl_queue) == -1)
 715          return -1;
 716
 717    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 718       if (dri2_surf->color_buffers[i].age > 0)
 719          dri2_surf->color_buffers[i].age++;
 720
 721    /* Make sure we have a back buffer in case we're swapping without ever
 722     * rendering. */
 723    if (get_back_bo(dri2_surf) < 0) {
 724       _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 725       return EGL_FALSE;
 726    }
 727
 728    if (draw->SwapInterval > 0) {
 729       dri2_surf->throttle_callback =
 730          wl_surface_frame(dri2_surf->wl_win->surface);
 731       wl_callback_add_listener(dri2_surf->throttle_callback,
 732                                &throttle_listener, dri2_surf);
 733       wl_proxy_set_queue((struct wl_proxy *) dri2_surf->throttle_callback,
 734                          dri2_dpy->wl_queue);
 735    }
 736
 737    dri2_surf->back->age = 1;
 738    dri2_surf->current = dri2_surf->back;
 739    dri2_surf->back = NULL;
 740
 741    create_wl_buffer(dri2_surf);
 742
 743    wl_surface_attach(dri2_surf->wl_win->surface,
 744                      dri2_surf->current->wl_buffer,
 745                      dri2_surf->dx, dri2_surf->dy);
 746
 747    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
 748    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
 749    /* reset resize growing parameters */
 750    dri2_surf->dx = 0;
 751    dri2_surf->dy = 0;
 752
 753    /* If the compositor doesn't support damage_buffer, we deliberately
 754     * ignore the damage region and post maximum damage, due to
 755     * https://bugs.freedesktop.org/78190 */
 756    if (!n_rects || !try_damage_buffer(dri2_surf, rects, n_rects))
 757       wl_surface_damage(dri2_surf->wl_win->surface,
 758                         0, 0, INT32_MAX, INT32_MAX);
 759
 760    if (dri2_dpy->is_different_gpu) {
 761       _EGLContext *ctx = _eglGetCurrentContext();
 762       struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 763       dri2_dpy->image->blitImage(dri2_ctx->dri_context,
 764                                  dri2_surf->current->linear_copy,
 765                                  dri2_surf->current->dri_image,
 766                                  0, 0, dri2_surf->base.Width,
 767                                  dri2_surf->base.Height,
 768                                  0, 0, dri2_surf->base.Width,
 769                                  dri2_surf->base.Height, 0);
 770    }
 771
 772    dri2_flush_drawable_for_swapbuffers(disp, draw);
 773    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 774
 775    wl_surface_commit(dri2_surf->wl_win->surface);
 776
 777    /* If we're not waiting for a frame callback then we'll at least throttle
 778     * to a sync callback so that we always give a chance for the compositor to
 779     * handle the commit and send a release event before checking for a free
 780     * buffer */
 781    if (dri2_surf->throttle_callback == NULL) {
 782       dri2_surf->throttle_callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
 783       wl_callback_add_listener(dri2_surf->throttle_callback,
 784                                &throttle_listener, dri2_surf);
 785    }
 786
 787    wl_display_flush(dri2_dpy->wl_dpy);
 788
 789    return EGL_TRUE;
 790 }
 791
 792 static EGLint
 793 dri2_wl_query_buffer_age(_EGLDriver *drv,
 794                          _EGLDisplay *disp, _EGLSurface *surface)
 795 {
 796    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 797
 798    if (get_back_bo(dri2_surf) < 0) {
 799       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 800       return 0;
 801    }
 802
 803    return dri2_surf->back->age;
 804 }
 805
 806 static EGLBoolean
 807 dri2_wl_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 808 {
 809    return dri2_wl_swap_buffers_with_damage (drv, disp, draw, NULL, 0);
 810 }
 811
 812 static struct wl_buffer *
 813 dri2_wl_create_wayland_buffer_from_image(_EGLDriver *drv,
 814                                           _EGLDisplay *disp,
 815                                           _EGLImage *img)
 816 {
 817    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 818    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
 819    __DRIimage *image = dri2_img->dri_image;
 820    struct wl_buffer *buffer;
 821    int width, height, format, pitch;
 822    enum wl_drm_format wl_format;
 823
 824    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &format);
 825
 826    switch (format) {
 827    case __DRI_IMAGE_FORMAT_ARGB8888:
 828       if (!(dri2_dpy->formats & HAS_ARGB8888))
 829          goto bad_format;
 830       wl_format = WL_DRM_FORMAT_ARGB8888;
 831       break;
 832    case __DRI_IMAGE_FORMAT_XRGB8888:
 833       if (!(dri2_dpy->formats & HAS_XRGB8888))
 834          goto bad_format;
 835       wl_format = WL_DRM_FORMAT_XRGB8888;
 836       break;
 837    default:
 838       goto bad_format;
 839    }
 840
 841    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_WIDTH, &width);
 842    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_HEIGHT, &height);
 843    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 844
 845    if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 846       int fd;
 847
 848       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 849
 850       buffer =
 851          wl_drm_create_prime_buffer(dri2_dpy->wl_drm,
 852                                     fd,
 853                                     width, height,
 854                                     wl_format,
 855                                     0, pitch,
 856                                     0, 0,
 857                                     0, 0);
 858
 859       close(fd);
 860    } else {
 861       int name;
 862
 863       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 864
 865       buffer =
 866          wl_drm_create_buffer(dri2_dpy->wl_drm,
 867                               name,
 868                               width, height,
 869                               pitch,
 870                               wl_format);
 871    }
 872
 873    /* The buffer object will have been created with our internal event queue
 874     * because it is using the wl_drm object as a proxy factory. We want the
 875     * buffer to be used by the application so we'll reset it to the display's
 876     * default event queue */
 877    if (buffer)
 878       wl_proxy_set_queue((struct wl_proxy *) buffer, NULL);
 879
 880    return buffer;
 881
 882 bad_format:
 883    _eglError(EGL_BAD_MATCH, "unsupported image format");
 884    return NULL;
 885 }
 886
 887 static int
 888 dri2_wl_authenticate(_EGLDisplay *disp, uint32_t id)
 889 {
 890    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 891    int ret = 0;
 892
 893    if (dri2_dpy->is_render_node) {
 894       _eglLog(_EGL_WARNING, "wayland-egl: client asks server to "
 895                             "authenticate for render-nodes");
 896       return 0;
 897    }
 898    dri2_dpy->authenticated = 0;
 899
 900    wl_drm_authenticate(dri2_dpy->wl_drm, id);
 901    if (roundtrip(dri2_dpy) < 0)
 902       ret = -1;
 903
 904    if (!dri2_dpy->authenticated)
 905       ret = -1;
 906
 907    /* reset authenticated */
 908    dri2_dpy->authenticated = 1;
 909
 910    return ret;
 911 }
 912
 913 static void
 914 drm_handle_device(void *data, struct wl_drm *drm, const char *device)
 915 {
 916    struct dri2_egl_display *dri2_dpy = data;
 917    drm_magic_t magic;
 918
 919    dri2_dpy->device_name = strdup(device);
 920    if (!dri2_dpy->device_name)
 921       return;
 922
 923    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 924    if (dri2_dpy->fd == -1) {
 925       _eglLog(_EGL_WARNING, "wayland-egl: could not open %s (%s)",
 926               dri2_dpy->device_name, strerror(errno));
 927       return;
 928    }
 929
 930    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
 931       dri2_dpy->authenticated = 1;
 932    } else {
 933       drmGetMagic(dri2_dpy->fd, &magic);
 934       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
 935    }
 936 }
 937
 938 static void
 939 drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
 940 {
 941    struct dri2_egl_display *dri2_dpy = data;
 942
 943    switch (format) {
 944    case WL_DRM_FORMAT_ARGB8888:
 945       dri2_dpy->formats |= HAS_ARGB8888;
 946       break;
 947    case WL_DRM_FORMAT_XRGB8888:
 948       dri2_dpy->formats |= HAS_XRGB8888;
 949       break;
 950    case WL_DRM_FORMAT_RGB565:
 951       dri2_dpy->formats |= HAS_RGB565;
 952       break;
 953    }
 954 }
 955
 956 static void
 957 drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
 958 {
 959    struct dri2_egl_display *dri2_dpy = data;
 960
 961    dri2_dpy->capabilities = value;
 962 }
 963
 964 static void
 965 drm_handle_authenticated(void *data, struct wl_drm *drm)
 966 {
 967    struct dri2_egl_display *dri2_dpy = data;
 968
 969    dri2_dpy->authenticated = 1;
 970 }
 971
 972 static const struct wl_drm_listener drm_listener = {
 973    .device = drm_handle_device,
 974    .format = drm_handle_format,
 975    .authenticated = drm_handle_authenticated,
 976    .capabilities = drm_handle_capabilities
 977 };
 978
 979 static void
 980 registry_handle_global_drm(void *data, struct wl_registry *registry, uint32_t name,
 981                        const char *interface, uint32_t version)
 982 {
 983    struct dri2_egl_display *dri2_dpy = data;
 984
 985    if (version > 1)
 986       version = 2;
 987    if (strcmp(interface, "wl_drm") == 0) {
 988       dri2_dpy->wl_drm =
 989          wl_registry_bind(registry, name, &wl_drm_interface, version);
 990       wl_drm_add_listener(dri2_dpy->wl_drm, &drm_listener, dri2_dpy);
 991    }
 992 }
 993
 994 static void
 995 registry_handle_global_remove(void *data, struct wl_registry *registry,
 996                               uint32_t name)
 997 {
 998 }
 999
1000 static const struct wl_registry_listener registry_listener_drm = {
1001    .global = registry_handle_global_drm,
1002    .global_remove = registry_handle_global_remove
1003 };
1004
1005 static EGLBoolean
1006 dri2_wl_swap_interval(_EGLDriver *drv,
1007                    _EGLDisplay *disp,
1008                    _EGLSurface *surf,
1009                    EGLint interval)
1010 {
1011    if (interval > surf->Config->MaxSwapInterval)
1012       interval = surf->Config->MaxSwapInterval;
1013    else if (interval < surf->Config->MinSwapInterval)
1014       interval = surf->Config->MinSwapInterval;
1015
1016    surf->SwapInterval = interval;
1017
1018    return EGL_TRUE;
1019 }
1020
1021 static void
1022 dri2_wl_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1023 {
1024    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1025
1026    /* We can't use values greater than 1 on Wayland because we are using the
1027     * frame callback to synchronise the frame and the only way we be sure to
1028     * get a frame callback is to attach a new buffer. Therefore we can't just
1029     * sit drawing nothing to wait until the next ‘n’ frame callbacks */
1030
1031    if (dri2_dpy->config)
1032       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1033                                      "vblank_mode", &vblank_mode);
1034    switch (vblank_mode) {
1035    case DRI_CONF_VBLANK_NEVER:
1036       dri2_dpy->min_swap_interval = 0;
1037       dri2_dpy->max_swap_interval = 0;
1038       dri2_dpy->default_swap_interval = 0;
1039       break;
1040    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1041       dri2_dpy->min_swap_interval = 1;
1042       dri2_dpy->max_swap_interval = 1;
1043       dri2_dpy->default_swap_interval = 1;
1044       break;
1045    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1046       dri2_dpy->min_swap_interval = 0;
1047       dri2_dpy->max_swap_interval = 1;
1048       dri2_dpy->default_swap_interval = 0;
1049       break;
1050    default:
1051    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1052       dri2_dpy->min_swap_interval = 0;
1053       dri2_dpy->max_swap_interval = 1;
1054       dri2_dpy->default_swap_interval = 1;
1055       break;
1056    }
1057 }
1058
1059 static struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
1060    .authenticate = dri2_wl_authenticate,
1061    .create_window_surface = dri2_wl_create_window_surface,
1062    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1063    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1064    .destroy_surface = dri2_wl_destroy_surface,
1065    .create_image = dri2_create_image_khr,
1066    .swap_interval = dri2_wl_swap_interval,
1067    .swap_buffers = dri2_wl_swap_buffers,
1068    .swap_buffers_with_damage = dri2_wl_swap_buffers_with_damage,
1069    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1070    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1071    .copy_buffers = dri2_fallback_copy_buffers,
1072    .query_buffer_age = dri2_wl_query_buffer_age,
1073    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
1074    .get_sync_values = dri2_fallback_get_sync_values,
1075    .get_dri_drawable = dri2_surface_get_dri_drawable,
1076 };
1077
1078 static const __DRIextension *dri2_loader_extensions[] = {
1079    &dri2_loader_extension.base,
1080    &image_loader_extension.base,
1081    &image_lookup_extension.base,
1082    &use_invalidate.base,
1083    NULL,
1084 };
1085
1086 static const __DRIextension *image_loader_extensions[] = {
1087    &image_loader_extension.base,
1088    &image_lookup_extension.base,
1089    &use_invalidate.base,
1090    NULL,
1091 };
1092
1093 static EGLBoolean
1094 dri2_wl_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
1095 {
1096    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1097    static const struct {
1098       const char *format_name;
1099       int has_format;
1100       unsigned int rgba_masks[4];
1101    } visuals[] = {
1102       { "XRGB8888", HAS_XRGB8888, { 0xff0000, 0xff00, 0x00ff, 0xff000000 } },
1103       { "ARGB8888", HAS_ARGB8888, { 0xff0000, 0xff00, 0x00ff, 0 } },
1104       { "RGB565",   HAS_RGB565,   { 0x00f800, 0x07e0, 0x001f, 0 } },
1105    };
1106    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
1107    unsigned int count, i, j;
1108
1109    count = 0;
1110    for (i = 0; dri2_dpy->driver_configs[i]; i++) {
1111       for (j = 0; j < ARRAY_SIZE(visuals); j++) {
1112          struct dri2_egl_config *dri2_conf;
1113
1114          if (!(dri2_dpy->formats & visuals[j].has_format))
1115             continue;
1116
1117          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1118                count + 1, EGL_WINDOW_BIT, NULL, visuals[j].rgba_masks);
1119          if (dri2_conf) {
1120             count++;
1121             format_count[j]++;
1122          }
1123       }
1124    }
1125
1126    for (i = 0; i < ARRAY_SIZE(format_count); i++) {
1127       if (!format_count[i]) {
1128          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
1129                  visuals[i].format_name);
1130       }
1131    }
1132
1133    return (count != 0);
1134 }
1135
1136 static EGLBoolean
1137 dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
1138 {
1139    struct dri2_egl_display *dri2_dpy;
1140
1141    loader_set_logger(_eglLog);
1142
1143    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1144    if (!dri2_dpy)
1145       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1146
1147    disp->DriverData = (void *) dri2_dpy;
1148    if (disp->PlatformDisplay == NULL) {
1149       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1150       if (dri2_dpy->wl_dpy == NULL)
1151          goto cleanup_dpy;
1152       dri2_dpy->own_device = 1;
1153    } else {
1154       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1155    }
1156
1157    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1158
1159    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1160    if (dri2_dpy->wl_dpy_wrapper == NULL)
1161       goto cleanup_dpy_wrapper;
1162
1163    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1164                       dri2_dpy->wl_queue);
1165
1166    if (dri2_dpy->own_device)
1167       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1168
1169    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1170    wl_registry_add_listener(dri2_dpy->wl_registry,
1171                             &registry_listener_drm, dri2_dpy);
1172    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_drm == NULL)
1173       goto cleanup_registry;
1174
1175    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->fd == -1)
1176       goto cleanup_drm;
1177
1178    if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
1179       goto cleanup_fd;
1180
1181    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
1182                                                &dri2_dpy->is_different_gpu);
1183    if (dri2_dpy->is_different_gpu) {
1184       free(dri2_dpy->device_name);
1185       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
1186       if (!dri2_dpy->device_name) {
1187          _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
1188                                   "for requested GPU");
1189          goto cleanup_fd;
1190       }
1191    }
1192
1193    /* we have to do the check now, because loader_get_user_preferred_fd
1194     * will return a render-node when the requested gpu is different
1195     * to the server, but also if the client asks for the same gpu than
1196     * the server by requesting its pci-id */
1197    dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
1198
1199    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
1200    if (dri2_dpy->driver_name == NULL) {
1201       _eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
1202       goto cleanup_fd;
1203    }
1204
1205    if (!dri2_load_driver(disp))
1206       goto cleanup_driver_name;
1207
1208    /* render nodes cannot use Gem names, and thus do not support
1209     * the __DRI_DRI2_LOADER extension */
1210    if (!dri2_dpy->is_render_node)
1211       dri2_dpy->loader_extensions = dri2_loader_extensions;
1212    else
1213       dri2_dpy->loader_extensions = image_loader_extensions;
1214
1215    if (!dri2_create_screen(disp))
1216       goto cleanup_driver;
1217
1218    dri2_wl_setup_swap_interval(dri2_dpy);
1219
1220    /* To use Prime, we must have _DRI_IMAGE v7 at least.
1221     * createImageFromFds support indicates that Prime export/import
1222     * is supported by the driver. Fall back to
1223     * gem names if we don't have Prime support. */
1224
1225    if (dri2_dpy->image->base.version < 7 ||
1226        dri2_dpy->image->createImageFromFds == NULL)
1227       dri2_dpy->capabilities &= ~WL_DRM_CAPABILITY_PRIME;
1228
1229    /* We cannot use Gem names with render-nodes, only prime fds (dma-buf).
1230     * The server needs to accept them */
1231    if (dri2_dpy->is_render_node &&
1232        !(dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME)) {
1233       _eglLog(_EGL_WARNING, "wayland-egl: display is not render-node capable");
1234       goto cleanup_screen;
1235    }
1236
1237    if (dri2_dpy->is_different_gpu &&
1238        (dri2_dpy->image->base.version < 9 ||
1239         dri2_dpy->image->blitImage == NULL)) {
1240       _eglLog(_EGL_WARNING, "wayland-egl: Different GPU selected, but the "
1241                             "Image extension in the driver is not "
1242                             "compatible. Version 9 or later and blitImage() "
1243                             "are required");
1244       goto cleanup_screen;
1245    }
1246
1247    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1248       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1249       goto cleanup_screen;
1250    }
1251
1252    dri2_set_WL_bind_wayland_display(drv, disp);
1253    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
1254     * because the buffer of the EGLImage has likely a tiling mode the server
1255     * gpu won't support. These is no way to check for now. Thus do not support the
1256     * extension */
1257    if (!dri2_dpy->is_different_gpu) {
1258       disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
1259    } else {
1260       dri2_wl_display_vtbl.create_wayland_buffer_from_image =
1261          dri2_fallback_create_wayland_buffer_from_image;
1262    }
1263    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1264
1265    disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
1266
1267    /* Fill vtbl last to prevent accidentally calling virtual function during
1268     * initialization.
1269     */
1270    dri2_dpy->vtbl = &dri2_wl_display_vtbl;
1271
1272    return EGL_TRUE;
1273
1274  cleanup_screen:
1275    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1276  cleanup_driver:
1277    dlclose(dri2_dpy->driver);
1278  cleanup_driver_name:
1279    free(dri2_dpy->driver_name);
1280  cleanup_fd:
1281    close(dri2_dpy->fd);
1282  cleanup_drm:
1283    free(dri2_dpy->device_name);
1284    wl_drm_destroy(dri2_dpy->wl_drm);
1285  cleanup_registry:
1286    wl_registry_destroy(dri2_dpy->wl_registry);
1287    wl_proxy_wrapper_destroy(dri2_dpy->wl_dpy_wrapper);
1288  cleanup_dpy_wrapper:
1289    wl_event_queue_destroy(dri2_dpy->wl_queue);
1290    if (disp->PlatformDisplay == NULL)
1291       wl_display_disconnect(dri2_dpy->wl_dpy);
1292  cleanup_dpy:
1293    free(dri2_dpy);
1294    disp->DriverData = NULL;
1295
1296    return EGL_FALSE;
1297 }
1298
1299 static int
1300 dri2_wl_swrast_get_stride_for_format(int format, int w)
1301 {
1302    if (format == WL_SHM_FORMAT_RGB565)
1303       return 2 * w;
1304    else /* ARGB8888 || XRGB8888 */
1305       return 4 * w;
1306 }
1307
1308 /*
1309  * Taken from weston shared/os-compatibility.c
1310  */
1311
1312 #ifndef HAVE_MKOSTEMP
1313
1314 static int
1315 set_cloexec_or_close(int fd)
1316 {
1317    long flags;
1318
1319    if (fd == -1)
1320       return -1;
1321
1322    flags = fcntl(fd, F_GETFD);
1323    if (flags == -1)
1324       goto err;
1325
1326    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
1327       goto err;
1328
1329    return fd;
1330
1331 err:
1332    close(fd);
1333    return -1;
1334 }
1335
1336 #endif
1337
1338 /*
1339  * Taken from weston shared/os-compatibility.c
1340  */
1341
1342 static int
1343 create_tmpfile_cloexec(char *tmpname)
1344 {
1345    int fd;
1346
1347 #ifdef HAVE_MKOSTEMP
1348    fd = mkostemp(tmpname, O_CLOEXEC);
1349    if (fd >= 0)
1350       unlink(tmpname);
1351 #else
1352    fd = mkstemp(tmpname);
1353    if (fd >= 0) {
1354       fd = set_cloexec_or_close(fd);
1355       unlink(tmpname);
1356    }
1357 #endif
1358
1359    return fd;
1360 }
1361
1362 /*
1363  * Taken from weston shared/os-compatibility.c
1364  *
1365  * Create a new, unique, anonymous file of the given size, and
1366  * return the file descriptor for it. The file descriptor is set
1367  * CLOEXEC. The file is immediately suitable for mmap()'ing
1368  * the given size at offset zero.
1369  *
1370  * The file should not have a permanent backing store like a disk,
1371  * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
1372  *
1373  * The file name is deleted from the file system.
1374  *
1375  * The file is suitable for buffer sharing between processes by
1376  * transmitting the file descriptor over Unix sockets using the
1377  * SCM_RIGHTS methods.
1378  *
1379  * If the C library implements posix_fallocate(), it is used to
1380  * guarantee that disk space is available for the file at the
1381  * given size. If disk space is insufficent, errno is set to ENOSPC.
1382  * If posix_fallocate() is not supported, program may receive
1383  * SIGBUS on accessing mmap()'ed file contents instead.
1384  */
1385 static int
1386 os_create_anonymous_file(off_t size)
1387 {
1388    static const char template[] = "/mesa-shared-XXXXXX";
1389    const char *path;
1390    char *name;
1391    int fd;
1392    int ret;
1393
1394    path = getenv("XDG_RUNTIME_DIR");
1395    if (!path) {
1396       errno = ENOENT;
1397       return -1;
1398    }
1399
1400    name = malloc(strlen(path) + sizeof(template));
1401    if (!name)
1402       return -1;
1403
1404    strcpy(name, path);
1405    strcat(name, template);
1406
1407    fd = create_tmpfile_cloexec(name);
1408
1409    free(name);
1410
1411    if (fd < 0)
1412       return -1;
1413
1414    ret = ftruncate(fd, size);
1415    if (ret < 0) {
1416       close(fd);
1417       return -1;
1418    }
1419
1420    return fd;
1421 }
1422
1423
1424 static EGLBoolean
1425 dri2_wl_swrast_allocate_buffer(struct dri2_egl_display *dri2_dpy,
1426                                int format, int w, int h,
1427                                void **data, int *size,
1428                                struct wl_buffer **buffer)
1429 {
1430    struct wl_shm_pool *pool;
1431    int fd, stride, size_map;
1432    void *data_map;
1433
1434    stride = dri2_wl_swrast_get_stride_for_format(format, w);
1435    size_map = h * stride;
1436
1437    /* Create a sharable buffer */
1438    fd = os_create_anonymous_file(size_map);
1439    if (fd < 0)
1440       return EGL_FALSE;
1441
1442    data_map = mmap(NULL, size_map, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1443    if (data_map == MAP_FAILED) {
1444       close(fd);
1445       return EGL_FALSE;
1446    }
1447
1448    /* Share it in a wl_buffer */
1449    pool = wl_shm_create_pool(dri2_dpy->wl_shm, fd, size_map);
1450    *buffer = wl_shm_pool_create_buffer(pool, 0, w, h, stride, format);
1451    wl_shm_pool_destroy(pool);
1452    close(fd);
1453
1454    *data = data_map;
1455    *size = size_map;
1456    return EGL_TRUE;
1457 }
1458
1459 static int
1460 swrast_update_buffers(struct dri2_egl_surface *dri2_surf)
1461 {
1462    struct dri2_egl_display *dri2_dpy =
1463       dri2_egl_display(dri2_surf->base.Resource.Display);
1464    int i;
1465
1466    /* we need to do the following operations only once per frame */
1467    if (dri2_surf->back)
1468       return 0;
1469
1470    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
1471        dri2_surf->base.Height != dri2_surf->wl_win->height) {
1472
1473       dri2_wl_release_buffers(dri2_surf);
1474
1475       dri2_surf->base.Width  = dri2_surf->wl_win->width;
1476       dri2_surf->base.Height = dri2_surf->wl_win->height;
1477       dri2_surf->dx = dri2_surf->wl_win->dx;
1478       dri2_surf->dy = dri2_surf->wl_win->dy;
1479       dri2_surf->current = NULL;
1480    }
1481
1482    /* find back buffer */
1483
1484    /* There might be a buffer release already queued that wasn't processed */
1485    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
1486
1487    /* try get free buffer already created */
1488    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1489       if (!dri2_surf->color_buffers[i].locked &&
1490           dri2_surf->color_buffers[i].wl_buffer) {
1491           dri2_surf->back = &dri2_surf->color_buffers[i];
1492           break;
1493       }
1494    }
1495
1496    /* else choose any another free location */
1497    if (!dri2_surf->back) {
1498       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1499          if (!dri2_surf->color_buffers[i].locked) {
1500              dri2_surf->back = &dri2_surf->color_buffers[i];
1501              if (!dri2_wl_swrast_allocate_buffer(dri2_dpy,
1502                                                  dri2_surf->format,
1503                                                  dri2_surf->base.Width,
1504                                                  dri2_surf->base.Height,
1505                                                  &dri2_surf->back->data,
1506                                                  &dri2_surf->back->data_size,
1507                                                  &dri2_surf->back->wl_buffer)) {
1508                 _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
1509                  return -1;
1510              }
1511              wl_proxy_set_queue((struct wl_proxy *) dri2_surf->back->wl_buffer,
1512                                 dri2_dpy->wl_queue);
1513              wl_buffer_add_listener(dri2_surf->back->wl_buffer,
1514                                     &wl_buffer_listener, dri2_surf);
1515              break;
1516          }
1517       }
1518    }
1519
1520    if (!dri2_surf->back) {
1521       _eglError(EGL_BAD_ALLOC, "failed to find free buffer");
1522       return -1;
1523    }
1524
1525    dri2_surf->back->locked = 1;
1526
1527    /* If we have an extra unlocked buffer at this point, we had to do triple
1528     * buffering for a while, but now can go back to just double buffering.
1529     * That means we can free any unlocked buffer now. */
1530    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1531       if (!dri2_surf->color_buffers[i].locked &&
1532           dri2_surf->color_buffers[i].wl_buffer) {
1533          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
1534          munmap(dri2_surf->color_buffers[i].data,
1535                 dri2_surf->color_buffers[i].data_size);
1536          dri2_surf->color_buffers[i].wl_buffer = NULL;
1537          dri2_surf->color_buffers[i].data = NULL;
1538       }
1539    }
1540
1541    return 0;
1542 }
1543
1544 static void*
1545 dri2_wl_swrast_get_frontbuffer_data(struct dri2_egl_surface *dri2_surf)
1546 {
1547    /* if there has been a resize: */
1548    if (!dri2_surf->current)
1549       return NULL;
1550
1551    return dri2_surf->current->data;
1552 }
1553
1554 static void*
1555 dri2_wl_swrast_get_backbuffer_data(struct dri2_egl_surface *dri2_surf)
1556 {
1557    assert(dri2_surf->back);
1558    return dri2_surf->back->data;
1559 }
1560
1561 static void
1562 dri2_wl_swrast_commit_backbuffer(struct dri2_egl_surface *dri2_surf)
1563 {
1564    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
1565
1566    while (dri2_surf->throttle_callback != NULL)
1567       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1568                                     dri2_dpy->wl_queue) == -1)
1569          return;
1570
1571    if (dri2_surf->base.SwapInterval > 0) {
1572       dri2_surf->throttle_callback =
1573          wl_surface_frame(dri2_surf->wl_win->surface);
1574       wl_callback_add_listener(dri2_surf->throttle_callback,
1575                                &throttle_listener, dri2_surf);
1576       wl_proxy_set_queue((struct wl_proxy *) dri2_surf->throttle_callback,
1577                          dri2_dpy->wl_queue);
1578    }
1579
1580    dri2_surf->current = dri2_surf->back;
1581    dri2_surf->back = NULL;
1582
1583    wl_surface_attach(dri2_surf->wl_win->surface,
1584                      dri2_surf->current->wl_buffer,
1585                      dri2_surf->dx, dri2_surf->dy);
1586
1587    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1588    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1589    /* reset resize growing parameters */
1590    dri2_surf->dx = 0;
1591    dri2_surf->dy = 0;
1592
1593    wl_surface_damage(dri2_surf->wl_win->surface,
1594                      0, 0, INT32_MAX, INT32_MAX);
1595    wl_surface_commit(dri2_surf->wl_win->surface);
1596
1597    /* If we're not waiting for a frame callback then we'll at least throttle
1598     * to a sync callback so that we always give a chance for the compositor to
1599     * handle the commit and send a release event before checking for a free
1600     * buffer */
1601    if (dri2_surf->throttle_callback == NULL) {
1602       dri2_surf->throttle_callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
1603       wl_callback_add_listener(dri2_surf->throttle_callback,
1604                                &throttle_listener, dri2_surf);
1605    }
1606
1607    wl_display_flush(dri2_dpy->wl_dpy);
1608 }
1609
1610 static void
1611 dri2_wl_swrast_get_drawable_info(__DRIdrawable * draw,
1612                                  int *x, int *y, int *w, int *h,
1613                                  void *loaderPrivate)
1614 {
1615    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1616
1617    (void) swrast_update_buffers(dri2_surf);
1618    *x = 0;
1619    *y = 0;
1620    *w = dri2_surf->base.Width;
1621    *h = dri2_surf->base.Height;
1622 }
1623
1624 static void
1625 dri2_wl_swrast_get_image(__DRIdrawable * read,
1626                          int x, int y, int w, int h,
1627                          char *data, void *loaderPrivate)
1628 {
1629    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1630    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1631    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1632    int src_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1633    int dst_stride = copy_width;
1634    char *src, *dst;
1635
1636    src = dri2_wl_swrast_get_frontbuffer_data(dri2_surf);
1637    if (!src) {
1638       memset(data, 0, copy_width * h);
1639       return;
1640    }
1641
1642    assert(data != src);
1643    assert(copy_width <= src_stride);
1644
1645    src += x_offset;
1646    src += y * src_stride;
1647    dst = data;
1648
1649    if (copy_width > src_stride-x_offset)
1650       copy_width = src_stride-x_offset;
1651    if (h > dri2_surf->base.Height-y)
1652       h = dri2_surf->base.Height-y;
1653
1654    for (; h>0; h--) {
1655       memcpy(dst, src, copy_width);
1656       src += src_stride;
1657       dst += dst_stride;
1658    }
1659 }
1660
1661 static void
1662 dri2_wl_swrast_put_image2(__DRIdrawable * draw, int op,
1663                          int x, int y, int w, int h, int stride,
1664                          char *data, void *loaderPrivate)
1665 {
1666    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1667    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1668    int dst_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1669    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1670    char *src, *dst;
1671
1672    assert(copy_width <= stride);
1673
1674    (void) swrast_update_buffers(dri2_surf);
1675    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
1676
1677    /* partial copy, copy old content */
1678    if (copy_width < dst_stride)
1679       dri2_wl_swrast_get_image(draw, 0, 0,
1680                                dri2_surf->base.Width, dri2_surf->base.Height,
1681                                dst, loaderPrivate);
1682
1683    dst += x_offset;
1684    dst += y * dst_stride;
1685
1686    src = data;
1687
1688    /* drivers expect we do these checks (and some rely on it) */
1689    if (copy_width > dst_stride-x_offset)
1690       copy_width = dst_stride-x_offset;
1691    if (h > dri2_surf->base.Height-y)
1692       h = dri2_surf->base.Height-y;
1693
1694    for (; h>0; h--) {
1695       memcpy(dst, src, copy_width);
1696       src += stride;
1697       dst += dst_stride;
1698    }
1699    dri2_wl_swrast_commit_backbuffer(dri2_surf);
1700 }
1701
1702 static void
1703 dri2_wl_swrast_put_image(__DRIdrawable * draw, int op,
1704                          int x, int y, int w, int h,
1705                          char *data, void *loaderPrivate)
1706 {
1707    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1708    int stride;
1709
1710    stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1711    dri2_wl_swrast_put_image2(draw, op, x, y, w, h,
1712                              stride, data, loaderPrivate);
1713 }
1714
1715 /**
1716  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
1717  */
1718 static _EGLSurface *
1719 dri2_wl_swrast_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
1720                                      _EGLConfig *conf, void *native_window,
1721                                      const EGLint *attrib_list)
1722 {
1723    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1724    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
1725    struct wl_egl_window *window = native_window;
1726    struct dri2_egl_surface *dri2_surf;
1727    const __DRIconfig *config;
1728
1729    (void) drv;
1730
1731    dri2_surf = calloc(1, sizeof *dri2_surf);
1732    if (!dri2_surf) {
1733       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
1734       return NULL;
1735    }
1736
1737    if (!_eglInitSurface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list))
1738       goto cleanup_surf;
1739
1740    if (conf->RedSize == 5)
1741       dri2_surf->format = WL_SHM_FORMAT_RGB565;
1742    else if (conf->AlphaSize == 0)
1743       dri2_surf->format = WL_SHM_FORMAT_XRGB8888;
1744    else
1745       dri2_surf->format = WL_SHM_FORMAT_ARGB8888;
1746
1747    dri2_surf->wl_win = window;
1748
1749    dri2_surf->base.Width = -1;
1750    dri2_surf->base.Height = -1;
1751
1752    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
1753                                 dri2_surf->base.GLColorspace);
1754
1755    dri2_surf->dri_drawable =
1756       dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen,
1757                                           config, dri2_surf);
1758    if (dri2_surf->dri_drawable == NULL) {
1759       _eglError(EGL_BAD_ALLOC, "swrast->createNewDrawable");
1760       goto cleanup_surf;
1761    }
1762
1763    dri2_wl_swap_interval(drv, disp, &dri2_surf->base,
1764                          dri2_dpy->default_swap_interval);
1765
1766    return &dri2_surf->base;
1767
1768  cleanup_surf:
1769    free(dri2_surf);
1770
1771    return NULL;
1772 }
1773
1774 static EGLBoolean
1775 dri2_wl_swrast_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1776 {
1777    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1778    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1779
1780    dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1781    return EGL_TRUE;
1782 }
1783
1784 static void
1785 shm_handle_format(void *data, struct wl_shm *shm, uint32_t format)
1786 {
1787    struct dri2_egl_display *dri2_dpy = data;
1788
1789    switch (format) {
1790    case WL_SHM_FORMAT_ARGB8888:
1791       dri2_dpy->formats |= HAS_ARGB8888;
1792       break;
1793    case WL_SHM_FORMAT_XRGB8888:
1794       dri2_dpy->formats |= HAS_XRGB8888;
1795       break;
1796    case WL_SHM_FORMAT_RGB565:
1797       dri2_dpy->formats |= HAS_RGB565;
1798       break;
1799    }
1800 }
1801
1802 static const struct wl_shm_listener shm_listener = {
1803    .format = shm_handle_format
1804 };
1805
1806 static void
1807 registry_handle_global_swrast(void *data, struct wl_registry *registry, uint32_t name,
1808                               const char *interface, uint32_t version)
1809 {
1810    struct dri2_egl_display *dri2_dpy = data;
1811
1812    if (strcmp(interface, "wl_shm") == 0) {
1813       dri2_dpy->wl_shm =
1814          wl_registry_bind(registry, name, &wl_shm_interface, 1);
1815       wl_shm_add_listener(dri2_dpy->wl_shm, &shm_listener, dri2_dpy);
1816    }
1817 }
1818
1819 static const struct wl_registry_listener registry_listener_swrast = {
1820    .global = registry_handle_global_swrast,
1821    .global_remove = registry_handle_global_remove
1822 };
1823
1824 static struct dri2_egl_display_vtbl dri2_wl_swrast_display_vtbl = {
1825    .authenticate = NULL,
1826    .create_window_surface = dri2_wl_swrast_create_window_surface,
1827    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1828    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1829    .destroy_surface = dri2_wl_destroy_surface,
1830    .create_image = dri2_fallback_create_image_khr,
1831    .swap_interval = dri2_wl_swap_interval,
1832    .swap_buffers = dri2_wl_swrast_swap_buffers,
1833    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1834    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1835    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1836    .copy_buffers = dri2_fallback_copy_buffers,
1837    .query_buffer_age = dri2_fallback_query_buffer_age,
1838    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1839    .get_sync_values = dri2_fallback_get_sync_values,
1840    .get_dri_drawable = dri2_surface_get_dri_drawable,
1841 };
1842
1843 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1844    .base = { __DRI_SWRAST_LOADER, 2 },
1845
1846    .getDrawableInfo = dri2_wl_swrast_get_drawable_info,
1847    .putImage        = dri2_wl_swrast_put_image,
1848    .getImage        = dri2_wl_swrast_get_image,
1849    .putImage2       = dri2_wl_swrast_put_image2,
1850 };
1851
1852 static const __DRIextension *swrast_loader_extensions[] = {
1853    &swrast_loader_extension.base,
1854    NULL,
1855 };
1856
1857 static EGLBoolean
1858 dri2_initialize_wayland_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1859 {
1860    struct dri2_egl_display *dri2_dpy;
1861
1862    loader_set_logger(_eglLog);
1863
1864    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1865    if (!dri2_dpy)
1866       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1867
1868    disp->DriverData = (void *) dri2_dpy;
1869    if (disp->PlatformDisplay == NULL) {
1870       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1871       if (dri2_dpy->wl_dpy == NULL)
1872          goto cleanup_dpy;
1873       dri2_dpy->own_device = 1;
1874    } else {
1875       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1876    }
1877
1878    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1879
1880    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1881    if (dri2_dpy->wl_dpy_wrapper == NULL)
1882       goto cleanup_dpy_wrapper;
1883
1884    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1885                       dri2_dpy->wl_queue);
1886
1887    if (dri2_dpy->own_device)
1888       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1889
1890    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1891    wl_registry_add_listener(dri2_dpy->wl_registry,
1892                             &registry_listener_swrast, dri2_dpy);
1893
1894    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_shm == NULL)
1895       goto cleanup_registry;
1896
1897    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->formats == 0)
1898       goto cleanup_shm;
1899
1900    dri2_dpy->fd = -1;
1901    dri2_dpy->driver_name = strdup("swrast");
1902    if (!dri2_load_driver_swrast(disp))
1903       goto cleanup_shm;
1904
1905    dri2_dpy->loader_extensions = swrast_loader_extensions;
1906
1907    if (!dri2_create_screen(disp))
1908       goto cleanup_driver;
1909
1910    dri2_wl_setup_swap_interval(dri2_dpy);
1911
1912    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1913       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1914       goto cleanup_screen;
1915    }
1916
1917    /* Fill vtbl last to prevent accidentally calling virtual function during
1918     * initialization.
1919     */
1920    dri2_dpy->vtbl = &dri2_wl_swrast_display_vtbl;
1921
1922    return EGL_TRUE;
1923
1924  cleanup_screen:
1925    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1926  cleanup_driver:
1927    dlclose(dri2_dpy->driver);
1928  cleanup_shm:
1929    wl_shm_destroy(dri2_dpy->wl_shm);
1930  cleanup_registry:
1931    wl_registry_destroy(dri2_dpy->wl_registry);
1932    wl_proxy_wrapper_destroy(dri2_dpy->wl_dpy_wrapper);
1933  cleanup_dpy_wrapper:
1934    wl_event_queue_destroy(dri2_dpy->wl_queue);
1935    if (disp->PlatformDisplay == NULL)
1936       wl_display_disconnect(dri2_dpy->wl_dpy);
1937  cleanup_dpy:
1938    free(dri2_dpy);
1939    disp->DriverData = NULL;
1940
1941    return EGL_FALSE;
1942 }
1943
1944 EGLBoolean
1945 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
1946 {
1947    EGLBoolean initialized = EGL_TRUE;
1948
1949    int hw_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1950
1951    if (hw_accel) {
1952       if (!dri2_initialize_wayland_drm(drv, disp)) {
1953          initialized = dri2_initialize_wayland_swrast(drv, disp);
1954       }
1955    } else {
1956       initialized = dri2_initialize_wayland_swrast(drv, disp);
1957    }
1958
1959    return initialized;
1960
1961 }