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