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