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