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