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 <drm_fourcc.h>
  40 #include <sys/mman.h>
  41
  42 #include "egl_dri2.h"
  43 #include "egl_dri2_fallbacks.h"
  44 #include "loader.h"
  45 #include "util/debug.h"
  46 #include "util/u_vector.h"
  47 #include "eglglobals.h"
  48
  49 #include <wayland-client.h>
  50 #include "wayland-drm-client-protocol.h"
  51 #include "linux-dmabuf-unstable-v1-client-protocol.h"
  52
  53 #ifndef DRM_FORMAT_MOD_INVALID
  54 #define DRM_FORMAT_MOD_INVALID ((1ULL << 56) - 1)
  55 #endif
  56
  57 #ifndef DRM_FORMAT_MOD_LINEAR
  58 #define DRM_FORMAT_MOD_LINEAR 0
  59 #endif
  60
  61 enum wl_drm_format_flags {
  62    HAS_ARGB8888 = 1,
  63    HAS_XRGB8888 = 2,
  64    HAS_RGB565 = 4,
  65 };
  66
  67 static int
  68 roundtrip(struct dri2_egl_display *dri2_dpy)
  69 {
  70    return wl_display_roundtrip_queue(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
  71 }
  72
  73 static void
  74 wl_buffer_release(void *data, struct wl_buffer *buffer)
  75 {
  76    struct dri2_egl_surface *dri2_surf = data;
  77    int i;
  78
  79    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); ++i)
  80       if (dri2_surf->color_buffers[i].wl_buffer == buffer)
  81          break;
  82
  83    if (i == ARRAY_SIZE(dri2_surf->color_buffers)) {
  84       wl_buffer_destroy(buffer);
  85       return;
  86    }
  87
  88    dri2_surf->color_buffers[i].locked = false;
  89 }
  90
  91 static const struct wl_buffer_listener wl_buffer_listener = {
  92    .release = wl_buffer_release
  93 };
  94
  95 static void
  96 resize_callback(struct wl_egl_window *wl_win, void *data)
  97 {
  98    struct dri2_egl_surface *dri2_surf = data;
  99    struct dri2_egl_display *dri2_dpy =
 100       dri2_egl_display(dri2_surf->base.Resource.Display);
 101
 102    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 103 }
 104
 105 static void
 106 destroy_window_callback(void *data)
 107 {
 108    struct dri2_egl_surface *dri2_surf = data;
 109    dri2_surf->wl_win = NULL;
 110 }
 111
 112 static struct wl_surface *
 113 get_wl_surface_proxy(struct wl_egl_window *window)
 114 {
 115     /* Version 3 of wl_egl_window introduced a version field at the same
 116      * location where a pointer to wl_surface was stored. Thus, if
 117      * window->version is dereferencable, we've been given an older version of
 118      * wl_egl_window, and window->version points to wl_surface */
 119    if (_eglPointerIsDereferencable((void *)(window->version))) {
 120       return wl_proxy_create_wrapper((void *)(window->version));
 121    }
 122    return wl_proxy_create_wrapper(window->surface);
 123 }
 124
 125 /**
 126  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 127  */
 128 static _EGLSurface *
 129 dri2_wl_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 130                               _EGLConfig *conf, void *native_window,
 131                               const EGLint *attrib_list)
 132 {
 133    __DRIcreateNewDrawableFunc createNewDrawable;
 134    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 135    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 136    struct wl_egl_window *window = native_window;
 137    struct dri2_egl_surface *dri2_surf;
 138    const __DRIconfig *config;
 139
 140    dri2_surf = calloc(1, sizeof *dri2_surf);
 141    if (!dri2_surf) {
 142       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 143       return NULL;
 144    }
 145
 146    if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list, false))
 147       goto cleanup_surf;
 148
 149    if (dri2_dpy->wl_dmabuf || dri2_dpy->wl_drm) {
 150       if (conf->RedSize == 5)
 151          dri2_surf->format = WL_DRM_FORMAT_RGB565;
 152       else if (conf->AlphaSize == 0)
 153          dri2_surf->format = WL_DRM_FORMAT_XRGB8888;
 154       else
 155          dri2_surf->format = WL_DRM_FORMAT_ARGB8888;
 156    } else {
 157       assert(dri2_dpy->wl_shm);
 158       if (conf->RedSize == 5)
 159          dri2_surf->format = WL_SHM_FORMAT_RGB565;
 160       else if (conf->AlphaSize == 0)
 161          dri2_surf->format = WL_SHM_FORMAT_XRGB8888;
 162       else
 163          dri2_surf->format = WL_SHM_FORMAT_ARGB8888;
 164    }
 165
 166    dri2_surf->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
 167    if (!dri2_surf->wl_queue) {
 168       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 169       goto cleanup_surf;
 170    }
 171
 172    if (dri2_dpy->wl_drm) {
 173       dri2_surf->wl_drm_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_drm);
 174       if (!dri2_surf->wl_drm_wrapper) {
 175          _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 176          goto cleanup_queue;
 177       }
 178       wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_drm_wrapper,
 179                          dri2_surf->wl_queue);
 180    }
 181
 182    dri2_surf->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
 183    if (!dri2_surf->wl_dpy_wrapper) {
 184       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 185       goto cleanup_drm;
 186    }
 187    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_dpy_wrapper,
 188                       dri2_surf->wl_queue);
 189
 190    dri2_surf->wl_surface_wrapper = get_wl_surface_proxy(window);
 191    if (!dri2_surf->wl_surface_wrapper) {
 192       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 193       goto cleanup_dpy_wrapper;
 194    }
 195    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_surface_wrapper,
 196                       dri2_surf->wl_queue);
 197
 198    dri2_surf->wl_win = window;
 199    dri2_surf->wl_win->private = dri2_surf;
 200    dri2_surf->wl_win->destroy_window_callback = destroy_window_callback;
 201    if (dri2_dpy->flush)
 202       dri2_surf->wl_win->resize_callback = resize_callback;
 203
 204    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 205                                 dri2_surf->base.GLColorspace);
 206
 207    if (dri2_dpy->image_driver)
 208       createNewDrawable = dri2_dpy->image_driver->createNewDrawable;
 209    else if (dri2_dpy->dri2)
 210       createNewDrawable = dri2_dpy->dri2->createNewDrawable;
 211    else
 212       createNewDrawable = dri2_dpy->swrast->createNewDrawable;
 213
 214    dri2_surf->dri_drawable = (*createNewDrawable)(dri2_dpy->dri_screen, config,
 215                                                   dri2_surf);
 216     if (dri2_surf->dri_drawable == NULL) {
 217       _eglError(EGL_BAD_ALLOC, "createNewDrawable");
 218        goto cleanup_surf_wrapper;
 219     }
 220
 221    dri2_surf->base.SwapInterval = dri2_dpy->default_swap_interval;
 222
 223    return &dri2_surf->base;
 224
 225  cleanup_surf_wrapper:
 226    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 227  cleanup_dpy_wrapper:
 228    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 229  cleanup_drm:
 230    if (dri2_surf->wl_drm_wrapper)
 231       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 232  cleanup_queue:
 233    wl_event_queue_destroy(dri2_surf->wl_queue);
 234  cleanup_surf:
 235    free(dri2_surf);
 236
 237    return NULL;
 238 }
 239
 240 static _EGLSurface *
 241 dri2_wl_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 242                               _EGLConfig *conf, void *native_window,
 243                               const EGLint *attrib_list)
 244 {
 245    /* From the EGL_EXT_platform_wayland spec, version 3:
 246     *
 247     *   It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 248     *   that belongs to Wayland. Any such call fails and generates
 249     *   EGL_BAD_PARAMETER.
 250     */
 251    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on "
 252              "Wayland");
 253    return NULL;
 254 }
 255
 256 /**
 257  * Called via eglDestroySurface(), drv->API.DestroySurface().
 258  */
 259 static EGLBoolean
 260 dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 261 {
 262    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 263    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 264
 265    (void) drv;
 266
 267    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 268
 269    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 270       if (dri2_surf->color_buffers[i].wl_buffer)
 271          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 272       if (dri2_surf->color_buffers[i].dri_image)
 273          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 274       if (dri2_surf->color_buffers[i].linear_copy)
 275          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 276       if (dri2_surf->color_buffers[i].data)
 277          munmap(dri2_surf->color_buffers[i].data,
 278                 dri2_surf->color_buffers[i].data_size);
 279    }
 280
 281    if (dri2_dpy->dri2)
 282       dri2_egl_surface_free_local_buffers(dri2_surf);
 283
 284    if (dri2_surf->throttle_callback)
 285       wl_callback_destroy(dri2_surf->throttle_callback);
 286
 287    if (dri2_surf->wl_win) {
 288       dri2_surf->wl_win->private = NULL;
 289       dri2_surf->wl_win->resize_callback = NULL;
 290       dri2_surf->wl_win->destroy_window_callback = NULL;
 291    }
 292
 293    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 294    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 295    if (dri2_surf->wl_drm_wrapper)
 296       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 297    wl_event_queue_destroy(dri2_surf->wl_queue);
 298
 299    dri2_fini_surface(surf);
 300    free(surf);
 301
 302    return EGL_TRUE;
 303 }
 304
 305 static void
 306 dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
 307 {
 308    struct dri2_egl_display *dri2_dpy =
 309       dri2_egl_display(dri2_surf->base.Resource.Display);
 310
 311    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 312       if (dri2_surf->color_buffers[i].wl_buffer &&
 313           !dri2_surf->color_buffers[i].locked)
 314          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 315       if (dri2_surf->color_buffers[i].dri_image)
 316          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 317       if (dri2_surf->color_buffers[i].linear_copy)
 318          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 319       if (dri2_surf->color_buffers[i].data)
 320          munmap(dri2_surf->color_buffers[i].data,
 321                 dri2_surf->color_buffers[i].data_size);
 322
 323       dri2_surf->color_buffers[i].wl_buffer = NULL;
 324       dri2_surf->color_buffers[i].dri_image = NULL;
 325       dri2_surf->color_buffers[i].linear_copy = NULL;
 326       dri2_surf->color_buffers[i].data = NULL;
 327       dri2_surf->color_buffers[i].locked = false;
 328    }
 329
 330    if (dri2_dpy->dri2)
 331       dri2_egl_surface_free_local_buffers(dri2_surf);
 332 }
 333
 334 static int
 335 get_back_bo(struct dri2_egl_surface *dri2_surf)
 336 {
 337    struct dri2_egl_display *dri2_dpy =
 338       dri2_egl_display(dri2_surf->base.Resource.Display);
 339    int use_flags;
 340    unsigned int dri_image_format;
 341    uint64_t *modifiers;
 342    int num_modifiers;
 343
 344    /* currently supports three WL DRM formats,
 345     * WL_DRM_FORMAT_ARGB8888, WL_DRM_FORMAT_XRGB8888,
 346     * and WL_DRM_FORMAT_RGB565
 347     */
 348    switch (dri2_surf->format) {
 349    case WL_DRM_FORMAT_ARGB8888:
 350       dri_image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 351       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.argb8888);
 352       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.argb8888);
 353       break;
 354    case WL_DRM_FORMAT_XRGB8888:
 355       dri_image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 356       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.xrgb8888);
 357       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.xrgb8888);
 358       break;
 359    case WL_DRM_FORMAT_RGB565:
 360       dri_image_format = __DRI_IMAGE_FORMAT_RGB565;
 361       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.rgb565);
 362       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.rgb565);
 363       break;
 364    default:
 365       /* format is not supported */
 366       return -1;
 367    }
 368
 369    /* There might be a buffer release already queued that wasn't processed */
 370    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
 371
 372    while (dri2_surf->back == NULL) {
 373       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 374          /* Get an unlocked buffer, preferrably one with a dri_buffer
 375           * already allocated. */
 376          if (dri2_surf->color_buffers[i].locked)
 377             continue;
 378          if (dri2_surf->back == NULL)
 379             dri2_surf->back = &dri2_surf->color_buffers[i];
 380          else if (dri2_surf->back->dri_image == NULL)
 381             dri2_surf->back = &dri2_surf->color_buffers[i];
 382       }
 383
 384       if (dri2_surf->back)
 385          break;
 386
 387       /* If we don't have a buffer, then block on the server to release one for
 388        * us, and try again. wl_display_dispatch_queue will process any pending
 389        * events, however not all servers flush on issuing a buffer release
 390        * event. So, we spam the server with roundtrips as they always cause a
 391        * client flush.
 392        */
 393       if (wl_display_roundtrip_queue(dri2_dpy->wl_dpy,
 394                                      dri2_surf->wl_queue) < 0)
 395           return -1;
 396    }
 397
 398    if (dri2_surf->back == NULL)
 399       return -1;
 400
 401    use_flags = __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_BACKBUFFER;
 402
 403    if (dri2_dpy->is_different_gpu &&
 404        dri2_surf->back->linear_copy == NULL) {
 405       /* The LINEAR modifier should be a perfect alias of the LINEAR use
 406        * flag; try the new interface first before the old, then fall back. */
 407       if (dri2_dpy->image->base.version >= 15 &&
 408            dri2_dpy->image->createImageWithModifiers) {
 409          uint64_t linear_mod = DRM_FORMAT_MOD_LINEAR;
 410
 411          dri2_surf->back->linear_copy =
 412             dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 413                                                       dri2_surf->base.Width,
 414                                                       dri2_surf->base.Height,
 415                                                       dri_image_format,
 416                                                       &linear_mod,
 417                                                       1,
 418                                                       NULL);
 419       } else {
 420          dri2_surf->back->linear_copy =
 421             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 422                                          dri2_surf->base.Width,
 423                                          dri2_surf->base.Height,
 424                                          dri_image_format,
 425                                          use_flags |
 426                                          __DRI_IMAGE_USE_LINEAR,
 427                                          NULL);
 428       }
 429       if (dri2_surf->back->linear_copy == NULL)
 430           return -1;
 431    }
 432
 433    if (dri2_surf->back->dri_image == NULL) {
 434       /* If our DRIImage implementation does not support
 435        * createImageWithModifiers, then fall back to the old createImage,
 436        * and hope it allocates an image which is acceptable to the winsys.
 437         */
 438       if (num_modifiers && dri2_dpy->image->base.version >= 15 &&
 439           dri2_dpy->image->createImageWithModifiers) {
 440          dri2_surf->back->dri_image =
 441            dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 442                                                      dri2_surf->base.Width,
 443                                                      dri2_surf->base.Height,
 444                                                      dri_image_format,
 445                                                      modifiers,
 446                                                      num_modifiers,
 447                                                      NULL);
 448       } else {
 449          dri2_surf->back->dri_image =
 450             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 451                                          dri2_surf->base.Width,
 452                                          dri2_surf->base.Height,
 453                                          dri_image_format,
 454                                          dri2_dpy->is_different_gpu ?
 455                                               0 : use_flags,
 456                                          NULL);
 457       }
 458
 459       dri2_surf->back->age = 0;
 460    }
 461    if (dri2_surf->back->dri_image == NULL)
 462       return -1;
 463
 464    dri2_surf->back->locked = true;
 465
 466    return 0;
 467 }
 468
 469
 470 static void
 471 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 472 {
 473    struct dri2_egl_display *dri2_dpy =
 474       dri2_egl_display(dri2_surf->base.Resource.Display);
 475    __DRIimage *image;
 476    int name, pitch;
 477
 478    image = dri2_surf->back->dri_image;
 479
 480    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 481    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 482
 483    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 484    buffer->name = name;
 485    buffer->pitch = pitch;
 486    buffer->cpp = 4;
 487    buffer->flags = 0;
 488 }
 489
 490 static int
 491 update_buffers(struct dri2_egl_surface *dri2_surf)
 492 {
 493    struct dri2_egl_display *dri2_dpy =
 494       dri2_egl_display(dri2_surf->base.Resource.Display);
 495
 496    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
 497        dri2_surf->base.Height != dri2_surf->wl_win->height) {
 498
 499       dri2_wl_release_buffers(dri2_surf);
 500
 501       dri2_surf->base.Width  = dri2_surf->wl_win->width;
 502       dri2_surf->base.Height = dri2_surf->wl_win->height;
 503       dri2_surf->dx = dri2_surf->wl_win->dx;
 504       dri2_surf->dy = dri2_surf->wl_win->dy;
 505    }
 506
 507    if (get_back_bo(dri2_surf) < 0) {
 508       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 509       return -1;
 510    }
 511
 512    /* If we have an extra unlocked buffer at this point, we had to do triple
 513     * buffering for a while, but now can go back to just double buffering.
 514     * That means we can free any unlocked buffer now. */
 515    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 516       if (!dri2_surf->color_buffers[i].locked &&
 517           dri2_surf->color_buffers[i].wl_buffer) {
 518          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 519          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 520          if (dri2_dpy->is_different_gpu)
 521             dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 522          dri2_surf->color_buffers[i].wl_buffer = NULL;
 523          dri2_surf->color_buffers[i].dri_image = NULL;
 524          dri2_surf->color_buffers[i].linear_copy = NULL;
 525       }
 526    }
 527
 528    return 0;
 529 }
 530
 531 static __DRIbuffer *
 532 dri2_wl_get_buffers_with_format(__DRIdrawable * driDrawable,
 533                                 int *width, int *height,
 534                                 unsigned int *attachments, int count,
 535                                 int *out_count, void *loaderPrivate)
 536 {
 537    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 538    int i, j;
 539
 540    if (update_buffers(dri2_surf) < 0)
 541       return NULL;
 542
 543    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 544       __DRIbuffer *local;
 545
 546       switch (attachments[i]) {
 547       case __DRI_BUFFER_BACK_LEFT:
 548          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 549          break;
 550       default:
 551          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 552                                                      attachments[i + 1]);
 553
 554          if (!local) {
 555             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 556             return NULL;
 557          }
 558          dri2_surf->buffers[j] = *local;
 559          break;
 560       }
 561    }
 562
 563    *out_count = j;
 564    if (j == 0)
 565       return NULL;
 566
 567    *width = dri2_surf->base.Width;
 568    *height = dri2_surf->base.Height;
 569
 570    return dri2_surf->buffers;
 571 }
 572
 573 static __DRIbuffer *
 574 dri2_wl_get_buffers(__DRIdrawable * driDrawable,
 575                     int *width, int *height,
 576                     unsigned int *attachments, int count,
 577                     int *out_count, void *loaderPrivate)
 578 {
 579    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 580    unsigned int *attachments_with_format;
 581    __DRIbuffer *buffer;
 582    unsigned int bpp;
 583
 584    switch (dri2_surf->format) {
 585    case WL_DRM_FORMAT_ARGB8888:
 586    case WL_DRM_FORMAT_XRGB8888:
 587       bpp = 32;
 588       break;
 589    case WL_DRM_FORMAT_RGB565:
 590       bpp = 16;
 591       break;
 592    default:
 593       /* format is not supported */
 594       return NULL;
 595    }
 596
 597    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 598    if (!attachments_with_format) {
 599       *out_count = 0;
 600       return NULL;
 601    }
 602
 603    for (int i = 0; i < count; ++i) {
 604       attachments_with_format[2*i] = attachments[i];
 605       attachments_with_format[2*i + 1] = bpp;
 606    }
 607
 608    buffer =
 609       dri2_wl_get_buffers_with_format(driDrawable,
 610                                       width, height,
 611                                       attachments_with_format, count,
 612                                       out_count, loaderPrivate);
 613
 614    free(attachments_with_format);
 615
 616    return buffer;
 617 }
 618
 619 static int
 620 image_get_buffers(__DRIdrawable *driDrawable,
 621                   unsigned int format,
 622                   uint32_t *stamp,
 623                   void *loaderPrivate,
 624                   uint32_t buffer_mask,
 625                   struct __DRIimageList *buffers)
 626 {
 627    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 628
 629    if (update_buffers(dri2_surf) < 0)
 630       return 0;
 631
 632    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 633    buffers->back = dri2_surf->back->dri_image;
 634
 635    return 1;
 636 }
 637
 638 static void
 639 dri2_wl_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 640 {
 641    (void) driDrawable;
 642    (void) loaderPrivate;
 643 }
 644
 645 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 646    .base = { __DRI_DRI2_LOADER, 3 },
 647
 648    .getBuffers           = dri2_wl_get_buffers,
 649    .flushFrontBuffer     = dri2_wl_flush_front_buffer,
 650    .getBuffersWithFormat = dri2_wl_get_buffers_with_format,
 651 };
 652
 653 static const __DRIimageLoaderExtension image_loader_extension = {
 654    .base = { __DRI_IMAGE_LOADER, 1 },
 655
 656    .getBuffers          = image_get_buffers,
 657    .flushFrontBuffer    = dri2_wl_flush_front_buffer,
 658 };
 659
 660 static void
 661 wayland_throttle_callback(void *data,
 662                           struct wl_callback *callback,
 663                           uint32_t time)
 664 {
 665    struct dri2_egl_surface *dri2_surf = data;
 666
 667    dri2_surf->throttle_callback = NULL;
 668    wl_callback_destroy(callback);
 669 }
 670
 671 static const struct wl_callback_listener throttle_listener = {
 672    .done = wayland_throttle_callback
 673 };
 674
 675 static struct wl_buffer *
 676 create_wl_buffer(struct dri2_egl_display *dri2_dpy,
 677                  struct dri2_egl_surface *dri2_surf,
 678                  __DRIimage *image)
 679 {
 680    struct wl_buffer *ret;
 681    EGLBoolean query;
 682    int width, height, fourcc, num_planes;
 683
 684    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_WIDTH, &width);
 685    query &= dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_HEIGHT,
 686                                         &height);
 687    query &= dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FOURCC,
 688                                         &fourcc);
 689    if (!query)
 690       return NULL;
 691
 692    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NUM_PLANES,
 693                                        &num_planes);
 694    if (!query)
 695       num_planes = 1;
 696
 697    if (dri2_dpy->wl_dmabuf && dri2_dpy->image->base.version >= 15) {
 698       struct zwp_linux_buffer_params_v1 *params;
 699       int mod_hi, mod_lo;
 700       int i;
 701
 702       query = dri2_dpy->image->queryImage(image,
 703                                           __DRI_IMAGE_ATTRIB_MODIFIER_UPPER,
 704                                           &mod_hi);
 705       query &= dri2_dpy->image->queryImage(image,
 706                                            __DRI_IMAGE_ATTRIB_MODIFIER_LOWER,
 707                                            &mod_lo);
 708       if (!query) {
 709          mod_hi = DRM_FORMAT_MOD_INVALID >> 32;
 710          mod_lo = DRM_FORMAT_MOD_INVALID & 0xffffffff;
 711       }
 712
 713       /* We don't need a wrapper for wl_dmabuf objects, because we have to
 714        * create the intermediate params object; we can set the queue on this,
 715        * and the wl_buffer inherits it race-free. */
 716       params = zwp_linux_dmabuf_v1_create_params(dri2_dpy->wl_dmabuf);
 717       if (dri2_surf)
 718          wl_proxy_set_queue((struct wl_proxy *) params, dri2_surf->wl_queue);
 719
 720       for (i = 0; i < num_planes; i++) {
 721          __DRIimage *p_image;
 722          int stride, offset;
 723          int fd = -1;
 724
 725          if (i == 0)
 726             p_image = image;
 727          else
 728             p_image = dri2_dpy->image->fromPlanar(image, i, NULL);
 729          if (!p_image) {
 730             zwp_linux_buffer_params_v1_destroy(params);
 731             return NULL;
 732          }
 733
 734          query = dri2_dpy->image->queryImage(p_image,
 735                                              __DRI_IMAGE_ATTRIB_FD,
 736                                              &fd);
 737          query &= dri2_dpy->image->queryImage(p_image,
 738                                               __DRI_IMAGE_ATTRIB_STRIDE,
 739                                               &stride);
 740          query &= dri2_dpy->image->queryImage(p_image,
 741                                               __DRI_IMAGE_ATTRIB_OFFSET,
 742                                               &offset);
 743          if (image != p_image)
 744             dri2_dpy->image->destroyImage(p_image);
 745
 746          if (!query) {
 747             if (fd >= 0)
 748                close(fd);
 749             zwp_linux_buffer_params_v1_destroy(params);
 750             return NULL;
 751          }
 752
 753          zwp_linux_buffer_params_v1_add(params, fd, i, offset, stride,
 754                                         mod_hi, mod_lo);
 755          close(fd);
 756       }
 757
 758       ret = zwp_linux_buffer_params_v1_create_immed(params, width, height,
 759                                                     fourcc, 0);
 760       zwp_linux_buffer_params_v1_destroy(params);
 761    } else if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 762       struct wl_drm *wl_drm =
 763          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 764       int fd, stride;
 765
 766       if (num_planes > 1)
 767          return NULL;
 768
 769       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 770       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 771       ret = wl_drm_create_prime_buffer(wl_drm, fd, width, height, fourcc, 0,
 772                                        stride, 0, 0, 0, 0);
 773       close(fd);
 774    } else {
 775       struct wl_drm *wl_drm =
 776          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 777       int name, stride;
 778
 779       if (num_planes > 1)
 780          return NULL;
 781
 782       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 783       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 784       ret = wl_drm_create_buffer(wl_drm, name, width, height, stride, fourcc);
 785    }
 786
 787    return ret;
 788 }
 789
 790 static EGLBoolean
 791 try_damage_buffer(struct dri2_egl_surface *dri2_surf,
 792                   const EGLint *rects,
 793                   EGLint n_rects)
 794 {
 795    if (wl_proxy_get_version((struct wl_proxy *) dri2_surf->wl_surface_wrapper)
 796        < WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION)
 797       return EGL_FALSE;
 798
 799    for (int i = 0; i < n_rects; i++) {
 800       const int *rect = &rects[i * 4];
 801
 802       wl_surface_damage_buffer(dri2_surf->wl_surface_wrapper,
 803                                rect[0],
 804                                dri2_surf->base.Height - rect[1] - rect[3],
 805                                rect[2], rect[3]);
 806    }
 807    return EGL_TRUE;
 808 }
 809 /**
 810  * Called via eglSwapBuffers(), drv->API.SwapBuffers().
 811  */
 812 static EGLBoolean
 813 dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
 814                                  _EGLDisplay *disp,
 815                                  _EGLSurface *draw,
 816                                  const EGLint *rects,
 817                                  EGLint n_rects)
 818 {
 819    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 820    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 821
 822    while (dri2_surf->throttle_callback != NULL)
 823       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
 824                                     dri2_surf->wl_queue) == -1)
 825          return -1;
 826
 827    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 828       if (dri2_surf->color_buffers[i].age > 0)
 829          dri2_surf->color_buffers[i].age++;
 830
 831    /* Make sure we have a back buffer in case we're swapping without ever
 832     * rendering. */
 833    if (get_back_bo(dri2_surf) < 0)
 834       return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 835
 836    if (draw->SwapInterval > 0) {
 837       dri2_surf->throttle_callback =
 838          wl_surface_frame(dri2_surf->wl_surface_wrapper);
 839       wl_callback_add_listener(dri2_surf->throttle_callback,
 840                                &throttle_listener, dri2_surf);
 841    }
 842
 843    dri2_surf->back->age = 1;
 844    dri2_surf->current = dri2_surf->back;
 845    dri2_surf->back = NULL;
 846
 847    if (!dri2_surf->current->wl_buffer) {
 848       __DRIimage *image;
 849
 850       if (dri2_dpy->is_different_gpu)
 851          image = dri2_surf->current->linear_copy;
 852       else
 853          image = dri2_surf->current->dri_image;
 854
 855       dri2_surf->current->wl_buffer =
 856          create_wl_buffer(dri2_dpy, dri2_surf, image);
 857
 858       wl_buffer_add_listener(dri2_surf->current->wl_buffer,
 859                              &wl_buffer_listener, dri2_surf);
 860    }
 861
 862    wl_surface_attach(dri2_surf->wl_surface_wrapper,
 863                      dri2_surf->current->wl_buffer,
 864                      dri2_surf->dx, dri2_surf->dy);
 865
 866    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
 867    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
 868    /* reset resize growing parameters */
 869    dri2_surf->dx = 0;
 870    dri2_surf->dy = 0;
 871
 872    /* If the compositor doesn't support damage_buffer, we deliberately
 873     * ignore the damage region and post maximum damage, due to
 874     * https://bugs.freedesktop.org/78190 */
 875    if (!n_rects || !try_damage_buffer(dri2_surf, rects, n_rects))
 876       wl_surface_damage(dri2_surf->wl_surface_wrapper,
 877                         0, 0, INT32_MAX, INT32_MAX);
 878
 879    if (dri2_dpy->is_different_gpu) {
 880       _EGLContext *ctx = _eglGetCurrentContext();
 881       struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 882       dri2_dpy->image->blitImage(dri2_ctx->dri_context,
 883                                  dri2_surf->current->linear_copy,
 884                                  dri2_surf->current->dri_image,
 885                                  0, 0, dri2_surf->base.Width,
 886                                  dri2_surf->base.Height,
 887                                  0, 0, dri2_surf->base.Width,
 888                                  dri2_surf->base.Height, 0);
 889    }
 890
 891    dri2_flush_drawable_for_swapbuffers(disp, draw);
 892    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 893
 894    wl_surface_commit(dri2_surf->wl_surface_wrapper);
 895
 896    /* If we're not waiting for a frame callback then we'll at least throttle
 897     * to a sync callback so that we always give a chance for the compositor to
 898     * handle the commit and send a release event before checking for a free
 899     * buffer */
 900    if (dri2_surf->throttle_callback == NULL) {
 901       dri2_surf->throttle_callback = wl_display_sync(dri2_surf->wl_dpy_wrapper);
 902       wl_callback_add_listener(dri2_surf->throttle_callback,
 903                                &throttle_listener, dri2_surf);
 904    }
 905
 906    wl_display_flush(dri2_dpy->wl_dpy);
 907
 908    return EGL_TRUE;
 909 }
 910
 911 static EGLint
 912 dri2_wl_query_buffer_age(_EGLDriver *drv,
 913                          _EGLDisplay *disp, _EGLSurface *surface)
 914 {
 915    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 916
 917    if (get_back_bo(dri2_surf) < 0) {
 918       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 919       return -1;
 920    }
 921
 922    return dri2_surf->back->age;
 923 }
 924
 925 static EGLBoolean
 926 dri2_wl_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 927 {
 928    return dri2_wl_swap_buffers_with_damage(drv, disp, draw, NULL, 0);
 929 }
 930
 931 static struct wl_buffer *
 932 dri2_wl_create_wayland_buffer_from_image(_EGLDriver *drv,
 933                                           _EGLDisplay *disp,
 934                                           _EGLImage *img)
 935 {
 936    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 937    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
 938    __DRIimage *image = dri2_img->dri_image;
 939    struct wl_buffer *buffer;
 940    int format;
 941
 942    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &format);
 943    switch (format) {
 944    case __DRI_IMAGE_FORMAT_ARGB8888:
 945       if (!(dri2_dpy->formats & HAS_ARGB8888))
 946          goto bad_format;
 947       break;
 948    case __DRI_IMAGE_FORMAT_XRGB8888:
 949       if (!(dri2_dpy->formats & HAS_XRGB8888))
 950          goto bad_format;
 951       break;
 952    default:
 953       goto bad_format;
 954    }
 955
 956    buffer = create_wl_buffer(dri2_dpy, NULL, image);
 957
 958    /* The buffer object will have been created with our internal event queue
 959     * because it is using wl_dmabuf/wl_drm as a proxy factory. We want the
 960     * buffer to be used by the application so we'll reset it to the display's
 961     * default event queue. This isn't actually racy, as the only event the
 962     * buffer can get is a buffer release, which doesn't happen with an explicit
 963     * attach. */
 964    if (buffer)
 965       wl_proxy_set_queue((struct wl_proxy *) buffer, NULL);
 966
 967    return buffer;
 968
 969 bad_format:
 970    _eglError(EGL_BAD_MATCH, "unsupported image format");
 971    return NULL;
 972 }
 973
 974 static int
 975 dri2_wl_authenticate(_EGLDisplay *disp, uint32_t id)
 976 {
 977    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 978    int ret = 0;
 979
 980    if (dri2_dpy->is_render_node) {
 981       _eglLog(_EGL_WARNING, "wayland-egl: client asks server to "
 982                             "authenticate for render-nodes");
 983       return 0;
 984    }
 985    dri2_dpy->authenticated = false;
 986
 987    wl_drm_authenticate(dri2_dpy->wl_drm, id);
 988    if (roundtrip(dri2_dpy) < 0)
 989       ret = -1;
 990
 991    if (!dri2_dpy->authenticated)
 992       ret = -1;
 993
 994    /* reset authenticated */
 995    dri2_dpy->authenticated = true;
 996
 997    return ret;
 998 }
 999
1000 static void
1001 drm_handle_device(void *data, struct wl_drm *drm, const char *device)
1002 {
1003    struct dri2_egl_display *dri2_dpy = data;
1004    drm_magic_t magic;
1005
1006    dri2_dpy->device_name = strdup(device);
1007    if (!dri2_dpy->device_name)
1008       return;
1009
1010    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
1011    if (dri2_dpy->fd == -1) {
1012       _eglLog(_EGL_WARNING, "wayland-egl: could not open %s (%s)",
1013               dri2_dpy->device_name, strerror(errno));
1014       return;
1015    }
1016
1017    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
1018       dri2_dpy->authenticated = true;
1019    } else {
1020       drmGetMagic(dri2_dpy->fd, &magic);
1021       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
1022    }
1023 }
1024
1025 static void
1026 drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
1027 {
1028    struct dri2_egl_display *dri2_dpy = data;
1029
1030    switch (format) {
1031    case WL_DRM_FORMAT_ARGB8888:
1032       dri2_dpy->formats |= HAS_ARGB8888;
1033       break;
1034    case WL_DRM_FORMAT_XRGB8888:
1035       dri2_dpy->formats |= HAS_XRGB8888;
1036       break;
1037    case WL_DRM_FORMAT_RGB565:
1038       dri2_dpy->formats |= HAS_RGB565;
1039       break;
1040    }
1041 }
1042
1043 static void
1044 drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
1045 {
1046    struct dri2_egl_display *dri2_dpy = data;
1047
1048    dri2_dpy->capabilities = value;
1049 }
1050
1051 static void
1052 drm_handle_authenticated(void *data, struct wl_drm *drm)
1053 {
1054    struct dri2_egl_display *dri2_dpy = data;
1055
1056    dri2_dpy->authenticated = true;
1057 }
1058
1059 static const struct wl_drm_listener drm_listener = {
1060    .device = drm_handle_device,
1061    .format = drm_handle_format,
1062    .authenticated = drm_handle_authenticated,
1063    .capabilities = drm_handle_capabilities
1064 };
1065
1066 static void
1067 dmabuf_ignore_format(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1068                      uint32_t format)
1069 {
1070    /* formats are implicitly advertised by the 'modifier' event, so ignore */
1071 }
1072
1073 static void
1074 dmabuf_handle_modifier(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1075                        uint32_t format, uint32_t modifier_hi,
1076                        uint32_t modifier_lo)
1077 {
1078    struct dri2_egl_display *dri2_dpy = data;
1079    uint64_t *mod = NULL;
1080
1081    if (modifier_hi == (DRM_FORMAT_MOD_INVALID >> 32) &&
1082        modifier_lo == (DRM_FORMAT_MOD_INVALID & 0xffffffff))
1083       return;
1084
1085    switch (format) {
1086    case WL_DRM_FORMAT_ARGB8888:
1087       mod = u_vector_add(&dri2_dpy->wl_modifiers.argb8888);
1088       dri2_dpy->formats |= HAS_ARGB8888;
1089       break;
1090    case WL_DRM_FORMAT_XRGB8888:
1091       mod = u_vector_add(&dri2_dpy->wl_modifiers.xrgb8888);
1092       dri2_dpy->formats |= HAS_XRGB8888;
1093       break;
1094    case WL_DRM_FORMAT_RGB565:
1095       mod = u_vector_add(&dri2_dpy->wl_modifiers.rgb565);
1096       dri2_dpy->formats |= HAS_RGB565;
1097       break;
1098    default:
1099       break;
1100    }
1101
1102    if (!mod)
1103       return;
1104
1105    *mod = (uint64_t) modifier_hi << 32;
1106    *mod |= (uint64_t) (modifier_lo & 0xffffffff);
1107 }
1108
1109 static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
1110    .format = dmabuf_ignore_format,
1111    .modifier = dmabuf_handle_modifier,
1112 };
1113
1114 static void
1115 registry_handle_global_drm(void *data, struct wl_registry *registry,
1116                            uint32_t name, const char *interface,
1117                            uint32_t version)
1118 {
1119    struct dri2_egl_display *dri2_dpy = data;
1120
1121    if (strcmp(interface, "wl_drm") == 0) {
1122       dri2_dpy->wl_drm =
1123          wl_registry_bind(registry, name, &wl_drm_interface, MIN2(version, 2));
1124       wl_drm_add_listener(dri2_dpy->wl_drm, &drm_listener, dri2_dpy);
1125    } else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0 && version >= 3) {
1126       dri2_dpy->wl_dmabuf =
1127          wl_registry_bind(registry, name, &zwp_linux_dmabuf_v1_interface,
1128                           MIN2(version, 3));
1129       zwp_linux_dmabuf_v1_add_listener(dri2_dpy->wl_dmabuf, &dmabuf_listener,
1130                                        dri2_dpy);
1131    }
1132 }
1133
1134 static void
1135 registry_handle_global_remove(void *data, struct wl_registry *registry,
1136                               uint32_t name)
1137 {
1138 }
1139
1140 static const struct wl_registry_listener registry_listener_drm = {
1141    .global = registry_handle_global_drm,
1142    .global_remove = registry_handle_global_remove
1143 };
1144
1145 static void
1146 dri2_wl_setup_swap_interval(_EGLDisplay *disp)
1147 {
1148    /* We can't use values greater than 1 on Wayland because we are using the
1149     * frame callback to synchronise the frame and the only way we be sure to
1150     * get a frame callback is to attach a new buffer. Therefore we can't just
1151     * sit drawing nothing to wait until the next ‘n’ frame callbacks */
1152
1153    dri2_setup_swap_interval(disp, 1);
1154 }
1155
1156 static const struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
1157    .authenticate = dri2_wl_authenticate,
1158    .create_window_surface = dri2_wl_create_window_surface,
1159    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1160    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1161    .destroy_surface = dri2_wl_destroy_surface,
1162    .create_image = dri2_create_image_khr,
1163    .swap_buffers = dri2_wl_swap_buffers,
1164    .swap_buffers_with_damage = dri2_wl_swap_buffers_with_damage,
1165    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1166    .set_damage_region = dri2_fallback_set_damage_region,
1167    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1168    .copy_buffers = dri2_fallback_copy_buffers,
1169    .query_buffer_age = dri2_wl_query_buffer_age,
1170    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
1171    .get_sync_values = dri2_fallback_get_sync_values,
1172    .get_dri_drawable = dri2_surface_get_dri_drawable,
1173 };
1174
1175 static const __DRIextension *dri2_loader_extensions[] = {
1176    &dri2_loader_extension.base,
1177    &image_loader_extension.base,
1178    &image_lookup_extension.base,
1179    &use_invalidate.base,
1180    NULL,
1181 };
1182
1183 static const __DRIextension *image_loader_extensions[] = {
1184    &image_loader_extension.base,
1185    &image_lookup_extension.base,
1186    &use_invalidate.base,
1187    NULL,
1188 };
1189
1190 static EGLBoolean
1191 dri2_wl_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
1192 {
1193    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1194    static const struct {
1195       const char *format_name;
1196       int has_format;
1197       unsigned int rgba_masks[4];
1198    } visuals[] = {
1199       { "XRGB8888", HAS_XRGB8888, { 0xff0000, 0xff00, 0x00ff, 0xff000000 } },
1200       { "ARGB8888", HAS_ARGB8888, { 0xff0000, 0xff00, 0x00ff, 0 } },
1201       { "RGB565",   HAS_RGB565,   { 0x00f800, 0x07e0, 0x001f, 0 } },
1202    };
1203    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
1204    unsigned int count = 0;
1205
1206    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
1207       for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
1208          struct dri2_egl_config *dri2_conf;
1209
1210          if (!(dri2_dpy->formats & visuals[j].has_format))
1211             continue;
1212
1213          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1214                count + 1, EGL_WINDOW_BIT, NULL, visuals[j].rgba_masks);
1215          if (dri2_conf) {
1216             if (dri2_conf->base.ConfigID == count + 1)
1217                count++;
1218             format_count[j]++;
1219          }
1220       }
1221    }
1222
1223    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
1224       if (!format_count[i]) {
1225          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
1226                  visuals[i].format_name);
1227       }
1228    }
1229
1230    return (count != 0);
1231 }
1232
1233 static EGLBoolean
1234 dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
1235 {
1236    struct dri2_egl_display *dri2_dpy;
1237
1238    loader_set_logger(_eglLog);
1239
1240    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1241    if (!dri2_dpy)
1242       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1243
1244    dri2_dpy->fd = -1;
1245    disp->DriverData = (void *) dri2_dpy;
1246    if (disp->PlatformDisplay == NULL) {
1247       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1248       if (dri2_dpy->wl_dpy == NULL)
1249          goto cleanup;
1250       dri2_dpy->own_device = true;
1251    } else {
1252       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1253    }
1254
1255    if (!u_vector_init(&dri2_dpy->wl_modifiers.xrgb8888, sizeof(uint64_t), 32) ||
1256        !u_vector_init(&dri2_dpy->wl_modifiers.argb8888, sizeof(uint64_t), 32) ||
1257        !u_vector_init(&dri2_dpy->wl_modifiers.rgb565, sizeof(uint64_t), 32)) {
1258       goto cleanup;
1259    }
1260
1261    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1262
1263    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1264    if (dri2_dpy->wl_dpy_wrapper == NULL)
1265       goto cleanup;
1266
1267    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1268                       dri2_dpy->wl_queue);
1269
1270    if (dri2_dpy->own_device)
1271       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1272
1273    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1274    wl_registry_add_listener(dri2_dpy->wl_registry,
1275                             &registry_listener_drm, dri2_dpy);
1276    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_drm == NULL)
1277       goto cleanup;
1278
1279    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->fd == -1)
1280       goto cleanup;
1281
1282    if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
1283       goto cleanup;
1284
1285    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
1286                                                &dri2_dpy->is_different_gpu);
1287    if (dri2_dpy->is_different_gpu) {
1288       free(dri2_dpy->device_name);
1289       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
1290       if (!dri2_dpy->device_name) {
1291          _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
1292                                   "for requested GPU");
1293          goto cleanup;
1294       }
1295    }
1296
1297    /* we have to do the check now, because loader_get_user_preferred_fd
1298     * will return a render-node when the requested gpu is different
1299     * to the server, but also if the client asks for the same gpu than
1300     * the server by requesting its pci-id */
1301    dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
1302
1303    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
1304    if (dri2_dpy->driver_name == NULL) {
1305       _eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
1306       goto cleanup;
1307    }
1308
1309    /* render nodes cannot use Gem names, and thus do not support
1310     * the __DRI_DRI2_LOADER extension */
1311    if (!dri2_dpy->is_render_node) {
1312       dri2_dpy->loader_extensions = dri2_loader_extensions;
1313       if (!dri2_load_driver(disp)) {
1314          _eglError(EGL_BAD_ALLOC, "DRI2: failed to load driver");
1315          goto cleanup;
1316       }
1317    } else {
1318       dri2_dpy->loader_extensions = image_loader_extensions;
1319       if (!dri2_load_driver_dri3(disp)) {
1320          _eglError(EGL_BAD_ALLOC, "DRI3: failed to load driver");
1321          goto cleanup;
1322       }
1323    }
1324
1325    if (!dri2_create_screen(disp))
1326       goto cleanup;
1327
1328    if (!dri2_setup_extensions(disp))
1329       goto cleanup;
1330
1331    dri2_setup_screen(disp);
1332
1333    dri2_wl_setup_swap_interval(disp);
1334
1335    /* To use Prime, we must have _DRI_IMAGE v7 at least.
1336     * createImageFromFds support indicates that Prime export/import
1337     * is supported by the driver. Fall back to
1338     * gem names if we don't have Prime support. */
1339
1340    if (dri2_dpy->image->base.version < 7 ||
1341        dri2_dpy->image->createImageFromFds == NULL)
1342       dri2_dpy->capabilities &= ~WL_DRM_CAPABILITY_PRIME;
1343
1344    /* We cannot use Gem names with render-nodes, only prime fds (dma-buf).
1345     * The server needs to accept them */
1346    if (dri2_dpy->is_render_node &&
1347        !(dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME)) {
1348       _eglLog(_EGL_WARNING, "wayland-egl: display is not render-node capable");
1349       goto cleanup;
1350    }
1351
1352    if (dri2_dpy->is_different_gpu &&
1353        (dri2_dpy->image->base.version < 9 ||
1354         dri2_dpy->image->blitImage == NULL)) {
1355       _eglLog(_EGL_WARNING, "wayland-egl: Different GPU selected, but the "
1356                             "Image extension in the driver is not "
1357                             "compatible. Version 9 or later and blitImage() "
1358                             "are required");
1359       goto cleanup;
1360    }
1361
1362    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1363       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1364       goto cleanup;
1365    }
1366
1367    dri2_set_WL_bind_wayland_display(drv, disp);
1368    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
1369     * because the buffer of the EGLImage has likely a tiling mode the server
1370     * gpu won't support. These is no way to check for now. Thus do not support the
1371     * extension */
1372    if (!dri2_dpy->is_different_gpu)
1373       disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
1374
1375    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1376
1377    disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
1378
1379    /* Fill vtbl last to prevent accidentally calling virtual function during
1380     * initialization.
1381     */
1382    dri2_dpy->vtbl = &dri2_wl_display_vtbl;
1383
1384    return EGL_TRUE;
1385
1386  cleanup:
1387    dri2_display_destroy(disp);
1388    return EGL_FALSE;
1389 }
1390
1391 static int
1392 dri2_wl_swrast_get_stride_for_format(int format, int w)
1393 {
1394    if (format == WL_SHM_FORMAT_RGB565)
1395       return 2 * w;
1396    else /* ARGB8888 || XRGB8888 */
1397       return 4 * w;
1398 }
1399
1400 /*
1401  * Taken from weston shared/os-compatibility.c
1402  */
1403
1404 #ifndef HAVE_MKOSTEMP
1405
1406 static int
1407 set_cloexec_or_close(int fd)
1408 {
1409    long flags;
1410
1411    if (fd == -1)
1412       return -1;
1413
1414    flags = fcntl(fd, F_GETFD);
1415    if (flags == -1)
1416       goto err;
1417
1418    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
1419       goto err;
1420
1421    return fd;
1422
1423 err:
1424    close(fd);
1425    return -1;
1426 }
1427
1428 #endif
1429
1430 /*
1431  * Taken from weston shared/os-compatibility.c
1432  */
1433
1434 static int
1435 create_tmpfile_cloexec(char *tmpname)
1436 {
1437    int fd;
1438
1439 #ifdef HAVE_MKOSTEMP
1440    fd = mkostemp(tmpname, O_CLOEXEC);
1441    if (fd >= 0)
1442       unlink(tmpname);
1443 #else
1444    fd = mkstemp(tmpname);
1445    if (fd >= 0) {
1446       fd = set_cloexec_or_close(fd);
1447       unlink(tmpname);
1448    }
1449 #endif
1450
1451    return fd;
1452 }
1453
1454 /*
1455  * Taken from weston shared/os-compatibility.c
1456  *
1457  * Create a new, unique, anonymous file of the given size, and
1458  * return the file descriptor for it. The file descriptor is set
1459  * CLOEXEC. The file is immediately suitable for mmap()'ing
1460  * the given size at offset zero.
1461  *
1462  * The file should not have a permanent backing store like a disk,
1463  * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
1464  *
1465  * The file name is deleted from the file system.
1466  *
1467  * The file is suitable for buffer sharing between processes by
1468  * transmitting the file descriptor over Unix sockets using the
1469  * SCM_RIGHTS methods.
1470  *
1471  * If the C library implements posix_fallocate(), it is used to
1472  * guarantee that disk space is available for the file at the
1473  * given size. If disk space is insufficent, errno is set to ENOSPC.
1474  * If posix_fallocate() is not supported, program may receive
1475  * SIGBUS on accessing mmap()'ed file contents instead.
1476  */
1477 static int
1478 os_create_anonymous_file(off_t size)
1479 {
1480    static const char templ[] = "/mesa-shared-XXXXXX";
1481    const char *path;
1482    char *name;
1483    int fd;
1484    int ret;
1485
1486    path = getenv("XDG_RUNTIME_DIR");
1487    if (!path) {
1488       errno = ENOENT;
1489       return -1;
1490    }
1491
1492    name = malloc(strlen(path) + sizeof(templ));
1493    if (!name)
1494       return -1;
1495
1496    strcpy(name, path);
1497    strcat(name, templ);
1498
1499    fd = create_tmpfile_cloexec(name);
1500
1501    free(name);
1502
1503    if (fd < 0)
1504       return -1;
1505
1506    ret = ftruncate(fd, size);
1507    if (ret < 0) {
1508       close(fd);
1509       return -1;
1510    }
1511
1512    return fd;
1513 }
1514
1515
1516 static EGLBoolean
1517 dri2_wl_swrast_allocate_buffer(struct dri2_egl_surface *dri2_surf,
1518                                int format, int w, int h,
1519                                void **data, int *size,
1520                                struct wl_buffer **buffer)
1521 {
1522    struct dri2_egl_display *dri2_dpy =
1523       dri2_egl_display(dri2_surf->base.Resource.Display);
1524    struct wl_shm_pool *pool;
1525    int fd, stride, size_map;
1526    void *data_map;
1527
1528    stride = dri2_wl_swrast_get_stride_for_format(format, w);
1529    size_map = h * stride;
1530
1531    /* Create a sharable buffer */
1532    fd = os_create_anonymous_file(size_map);
1533    if (fd < 0)
1534       return EGL_FALSE;
1535
1536    data_map = mmap(NULL, size_map, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1537    if (data_map == MAP_FAILED) {
1538       close(fd);
1539       return EGL_FALSE;
1540    }
1541
1542    /* Share it in a wl_buffer */
1543    pool = wl_shm_create_pool(dri2_dpy->wl_shm, fd, size_map);
1544    wl_proxy_set_queue((struct wl_proxy *)pool, dri2_surf->wl_queue);
1545    *buffer = wl_shm_pool_create_buffer(pool, 0, w, h, stride, format);
1546    wl_shm_pool_destroy(pool);
1547    close(fd);
1548
1549    *data = data_map;
1550    *size = size_map;
1551    return EGL_TRUE;
1552 }
1553
1554 static int
1555 swrast_update_buffers(struct dri2_egl_surface *dri2_surf)
1556 {
1557    struct dri2_egl_display *dri2_dpy =
1558       dri2_egl_display(dri2_surf->base.Resource.Display);
1559
1560    /* we need to do the following operations only once per frame */
1561    if (dri2_surf->back)
1562       return 0;
1563
1564    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
1565        dri2_surf->base.Height != dri2_surf->wl_win->height) {
1566
1567       dri2_wl_release_buffers(dri2_surf);
1568
1569       dri2_surf->base.Width  = dri2_surf->wl_win->width;
1570       dri2_surf->base.Height = dri2_surf->wl_win->height;
1571       dri2_surf->dx = dri2_surf->wl_win->dx;
1572       dri2_surf->dy = dri2_surf->wl_win->dy;
1573       dri2_surf->current = NULL;
1574    }
1575
1576    /* find back buffer */
1577
1578    /* There might be a buffer release already queued that wasn't processed */
1579    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
1580
1581    /* try get free buffer already created */
1582    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1583       if (!dri2_surf->color_buffers[i].locked &&
1584           dri2_surf->color_buffers[i].wl_buffer) {
1585           dri2_surf->back = &dri2_surf->color_buffers[i];
1586           break;
1587       }
1588    }
1589
1590    /* else choose any another free location */
1591    if (!dri2_surf->back) {
1592       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1593          if (!dri2_surf->color_buffers[i].locked) {
1594              dri2_surf->back = &dri2_surf->color_buffers[i];
1595              if (!dri2_wl_swrast_allocate_buffer(dri2_surf,
1596                                                  dri2_surf->format,
1597                                                  dri2_surf->base.Width,
1598                                                  dri2_surf->base.Height,
1599                                                  &dri2_surf->back->data,
1600                                                  &dri2_surf->back->data_size,
1601                                                  &dri2_surf->back->wl_buffer)) {
1602                 _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
1603                  return -1;
1604              }
1605              wl_buffer_add_listener(dri2_surf->back->wl_buffer,
1606                                     &wl_buffer_listener, dri2_surf);
1607              break;
1608          }
1609       }
1610    }
1611
1612    if (!dri2_surf->back) {
1613       _eglError(EGL_BAD_ALLOC, "failed to find free buffer");
1614       return -1;
1615    }
1616
1617    dri2_surf->back->locked = true;
1618
1619    /* If we have an extra unlocked buffer at this point, we had to do triple
1620     * buffering for a while, but now can go back to just double buffering.
1621     * That means we can free any unlocked buffer now. */
1622    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1623       if (!dri2_surf->color_buffers[i].locked &&
1624           dri2_surf->color_buffers[i].wl_buffer) {
1625          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
1626          munmap(dri2_surf->color_buffers[i].data,
1627                 dri2_surf->color_buffers[i].data_size);
1628          dri2_surf->color_buffers[i].wl_buffer = NULL;
1629          dri2_surf->color_buffers[i].data = NULL;
1630       }
1631    }
1632
1633    return 0;
1634 }
1635
1636 static void*
1637 dri2_wl_swrast_get_frontbuffer_data(struct dri2_egl_surface *dri2_surf)
1638 {
1639    /* if there has been a resize: */
1640    if (!dri2_surf->current)
1641       return NULL;
1642
1643    return dri2_surf->current->data;
1644 }
1645
1646 static void*
1647 dri2_wl_swrast_get_backbuffer_data(struct dri2_egl_surface *dri2_surf)
1648 {
1649    assert(dri2_surf->back);
1650    return dri2_surf->back->data;
1651 }
1652
1653 static void
1654 dri2_wl_swrast_commit_backbuffer(struct dri2_egl_surface *dri2_surf)
1655 {
1656    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
1657
1658    while (dri2_surf->throttle_callback != NULL)
1659       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1660                                     dri2_surf->wl_queue) == -1)
1661          return;
1662
1663    if (dri2_surf->base.SwapInterval > 0) {
1664       dri2_surf->throttle_callback =
1665          wl_surface_frame(dri2_surf->wl_surface_wrapper);
1666       wl_callback_add_listener(dri2_surf->throttle_callback,
1667                                &throttle_listener, dri2_surf);
1668    }
1669
1670    dri2_surf->current = dri2_surf->back;
1671    dri2_surf->back = NULL;
1672
1673    wl_surface_attach(dri2_surf->wl_surface_wrapper,
1674                      dri2_surf->current->wl_buffer,
1675                      dri2_surf->dx, dri2_surf->dy);
1676
1677    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1678    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1679    /* reset resize growing parameters */
1680    dri2_surf->dx = 0;
1681    dri2_surf->dy = 0;
1682
1683    wl_surface_damage(dri2_surf->wl_surface_wrapper,
1684                      0, 0, INT32_MAX, INT32_MAX);
1685    wl_surface_commit(dri2_surf->wl_surface_wrapper);
1686
1687    /* If we're not waiting for a frame callback then we'll at least throttle
1688     * to a sync callback so that we always give a chance for the compositor to
1689     * handle the commit and send a release event before checking for a free
1690     * buffer */
1691    if (dri2_surf->throttle_callback == NULL) {
1692       dri2_surf->throttle_callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
1693       wl_callback_add_listener(dri2_surf->throttle_callback,
1694                                &throttle_listener, dri2_surf);
1695    }
1696
1697    wl_display_flush(dri2_dpy->wl_dpy);
1698 }
1699
1700 static void
1701 dri2_wl_swrast_get_drawable_info(__DRIdrawable * draw,
1702                                  int *x, int *y, int *w, int *h,
1703                                  void *loaderPrivate)
1704 {
1705    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1706
1707    (void) swrast_update_buffers(dri2_surf);
1708    *x = 0;
1709    *y = 0;
1710    *w = dri2_surf->base.Width;
1711    *h = dri2_surf->base.Height;
1712 }
1713
1714 static void
1715 dri2_wl_swrast_get_image(__DRIdrawable * read,
1716                          int x, int y, int w, int h,
1717                          char *data, void *loaderPrivate)
1718 {
1719    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1720    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1721    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1722    int src_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1723    int dst_stride = copy_width;
1724    char *src, *dst;
1725
1726    src = dri2_wl_swrast_get_frontbuffer_data(dri2_surf);
1727    if (!src) {
1728       memset(data, 0, copy_width * h);
1729       return;
1730    }
1731
1732    assert(data != src);
1733    assert(copy_width <= src_stride);
1734
1735    src += x_offset;
1736    src += y * src_stride;
1737    dst = data;
1738
1739    if (copy_width > src_stride-x_offset)
1740       copy_width = src_stride-x_offset;
1741    if (h > dri2_surf->base.Height-y)
1742       h = dri2_surf->base.Height-y;
1743
1744    for (; h>0; h--) {
1745       memcpy(dst, src, copy_width);
1746       src += src_stride;
1747       dst += dst_stride;
1748    }
1749 }
1750
1751 static void
1752 dri2_wl_swrast_put_image2(__DRIdrawable * draw, int op,
1753                          int x, int y, int w, int h, int stride,
1754                          char *data, void *loaderPrivate)
1755 {
1756    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1757    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1758    int dst_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1759    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1760    char *src, *dst;
1761
1762    assert(copy_width <= stride);
1763
1764    (void) swrast_update_buffers(dri2_surf);
1765    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
1766
1767    /* partial copy, copy old content */
1768    if (copy_width < dst_stride)
1769       dri2_wl_swrast_get_image(draw, 0, 0,
1770                                dri2_surf->base.Width, dri2_surf->base.Height,
1771                                dst, loaderPrivate);
1772
1773    dst += x_offset;
1774    dst += y * dst_stride;
1775
1776    src = data;
1777
1778    /* drivers expect we do these checks (and some rely on it) */
1779    if (copy_width > dst_stride-x_offset)
1780       copy_width = dst_stride-x_offset;
1781    if (h > dri2_surf->base.Height-y)
1782       h = dri2_surf->base.Height-y;
1783
1784    for (; h>0; h--) {
1785       memcpy(dst, src, copy_width);
1786       src += stride;
1787       dst += dst_stride;
1788    }
1789    dri2_wl_swrast_commit_backbuffer(dri2_surf);
1790 }
1791
1792 static void
1793 dri2_wl_swrast_put_image(__DRIdrawable * draw, int op,
1794                          int x, int y, int w, int h,
1795                          char *data, void *loaderPrivate)
1796 {
1797    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1798    int stride;
1799
1800    stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1801    dri2_wl_swrast_put_image2(draw, op, x, y, w, h,
1802                              stride, data, loaderPrivate);
1803 }
1804
1805 static EGLBoolean
1806 dri2_wl_swrast_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1807 {
1808    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1809    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1810
1811    dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1812    return EGL_TRUE;
1813 }
1814
1815 static void
1816 shm_handle_format(void *data, struct wl_shm *shm, uint32_t format)
1817 {
1818    struct dri2_egl_display *dri2_dpy = data;
1819
1820    switch (format) {
1821    case WL_SHM_FORMAT_ARGB8888:
1822       dri2_dpy->formats |= HAS_ARGB8888;
1823       break;
1824    case WL_SHM_FORMAT_XRGB8888:
1825       dri2_dpy->formats |= HAS_XRGB8888;
1826       break;
1827    case WL_SHM_FORMAT_RGB565:
1828       dri2_dpy->formats |= HAS_RGB565;
1829       break;
1830    }
1831 }
1832
1833 static const struct wl_shm_listener shm_listener = {
1834    .format = shm_handle_format
1835 };
1836
1837 static void
1838 registry_handle_global_swrast(void *data, struct wl_registry *registry,
1839                               uint32_t name, const char *interface,
1840                               uint32_t version)
1841 {
1842    struct dri2_egl_display *dri2_dpy = data;
1843
1844    if (strcmp(interface, "wl_shm") == 0) {
1845       dri2_dpy->wl_shm =
1846          wl_registry_bind(registry, name, &wl_shm_interface, 1);
1847       wl_shm_add_listener(dri2_dpy->wl_shm, &shm_listener, dri2_dpy);
1848    }
1849 }
1850
1851 static const struct wl_registry_listener registry_listener_swrast = {
1852    .global = registry_handle_global_swrast,
1853    .global_remove = registry_handle_global_remove
1854 };
1855
1856 static const struct dri2_egl_display_vtbl dri2_wl_swrast_display_vtbl = {
1857    .authenticate = NULL,
1858    .create_window_surface = dri2_wl_create_window_surface,
1859    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1860    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1861    .destroy_surface = dri2_wl_destroy_surface,
1862    .create_image = dri2_create_image_khr,
1863    .swap_buffers = dri2_wl_swrast_swap_buffers,
1864    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1865    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1866    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1867    .copy_buffers = dri2_fallback_copy_buffers,
1868    .query_buffer_age = dri2_fallback_query_buffer_age,
1869    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1870    .get_sync_values = dri2_fallback_get_sync_values,
1871    .get_dri_drawable = dri2_surface_get_dri_drawable,
1872 };
1873
1874 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1875    .base = { __DRI_SWRAST_LOADER, 2 },
1876
1877    .getDrawableInfo = dri2_wl_swrast_get_drawable_info,
1878    .putImage        = dri2_wl_swrast_put_image,
1879    .getImage        = dri2_wl_swrast_get_image,
1880    .putImage2       = dri2_wl_swrast_put_image2,
1881 };
1882
1883 static const __DRIextension *swrast_loader_extensions[] = {
1884    &swrast_loader_extension.base,
1885    &image_lookup_extension.base,
1886    NULL,
1887 };
1888
1889 static EGLBoolean
1890 dri2_initialize_wayland_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1891 {
1892    struct dri2_egl_display *dri2_dpy;
1893
1894    loader_set_logger(_eglLog);
1895
1896    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1897    if (!dri2_dpy)
1898       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1899
1900    dri2_dpy->fd = -1;
1901    disp->DriverData = (void *) dri2_dpy;
1902    if (disp->PlatformDisplay == NULL) {
1903       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1904       if (dri2_dpy->wl_dpy == NULL)
1905          goto cleanup;
1906       dri2_dpy->own_device = true;
1907    } else {
1908       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1909    }
1910
1911    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1912
1913    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1914    if (dri2_dpy->wl_dpy_wrapper == NULL)
1915       goto cleanup;
1916
1917    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1918                       dri2_dpy->wl_queue);
1919
1920    if (dri2_dpy->own_device)
1921       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1922
1923    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1924    wl_registry_add_listener(dri2_dpy->wl_registry,
1925                             &registry_listener_swrast, dri2_dpy);
1926
1927    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_shm == NULL)
1928       goto cleanup;
1929
1930    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->formats == 0)
1931       goto cleanup;
1932
1933    dri2_dpy->driver_name = strdup("swrast");
1934    if (!dri2_load_driver_swrast(disp))
1935       goto cleanup;
1936
1937    dri2_dpy->loader_extensions = swrast_loader_extensions;
1938
1939    if (!dri2_create_screen(disp))
1940       goto cleanup;
1941
1942    if (!dri2_setup_extensions(disp))
1943       goto cleanup;
1944
1945    dri2_setup_screen(disp);
1946
1947    dri2_wl_setup_swap_interval(disp);
1948
1949    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1950       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1951       goto cleanup;
1952    }
1953
1954    /* Fill vtbl last to prevent accidentally calling virtual function during
1955     * initialization.
1956     */
1957    dri2_dpy->vtbl = &dri2_wl_swrast_display_vtbl;
1958
1959    return EGL_TRUE;
1960
1961  cleanup:
1962    dri2_display_destroy(disp);
1963    return EGL_FALSE;
1964 }
1965
1966 EGLBoolean
1967 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
1968 {
1969    EGLBoolean initialized = EGL_FALSE;
1970
1971    if (!env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false))
1972       initialized = dri2_initialize_wayland_drm(drv, disp);
1973
1974    if (!initialized)
1975       initialized = dri2_initialize_wayland_swrast(drv, disp);
1976
1977    return initialized;
1978
1979 }