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 (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list, false))
 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    dri2_fini_surface(surf);
 299    free(surf);
 300
 301    return EGL_TRUE;
 302 }
 303
 304 static void
 305 dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
 306 {
 307    struct dri2_egl_display *dri2_dpy =
 308       dri2_egl_display(dri2_surf->base.Resource.Display);
 309
 310    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 311       if (dri2_surf->color_buffers[i].wl_buffer &&
 312           !dri2_surf->color_buffers[i].locked)
 313          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 314       if (dri2_surf->color_buffers[i].dri_image)
 315          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 316       if (dri2_surf->color_buffers[i].linear_copy)
 317          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 318       if (dri2_surf->color_buffers[i].data)
 319          munmap(dri2_surf->color_buffers[i].data,
 320                 dri2_surf->color_buffers[i].data_size);
 321
 322       dri2_surf->color_buffers[i].wl_buffer = NULL;
 323       dri2_surf->color_buffers[i].dri_image = NULL;
 324       dri2_surf->color_buffers[i].linear_copy = NULL;
 325       dri2_surf->color_buffers[i].data = NULL;
 326       dri2_surf->color_buffers[i].locked = false;
 327    }
 328
 329    if (dri2_dpy->dri2)
 330       dri2_egl_surface_free_local_buffers(dri2_surf);
 331 }
 332
 333 static int
 334 get_back_bo(struct dri2_egl_surface *dri2_surf)
 335 {
 336    struct dri2_egl_display *dri2_dpy =
 337       dri2_egl_display(dri2_surf->base.Resource.Display);
 338    int use_flags;
 339    unsigned int dri_image_format;
 340    uint64_t *modifiers;
 341    int num_modifiers;
 342
 343    /* currently supports three WL DRM formats,
 344     * WL_DRM_FORMAT_ARGB8888, WL_DRM_FORMAT_XRGB8888,
 345     * and WL_DRM_FORMAT_RGB565
 346     */
 347    switch (dri2_surf->format) {
 348    case WL_DRM_FORMAT_ARGB8888:
 349       dri_image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 350       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.argb8888);
 351       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.argb8888);
 352       break;
 353    case WL_DRM_FORMAT_XRGB8888:
 354       dri_image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 355       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.xrgb8888);
 356       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.xrgb8888);
 357       break;
 358    case WL_DRM_FORMAT_RGB565:
 359       dri_image_format = __DRI_IMAGE_FORMAT_RGB565;
 360       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.rgb565);
 361       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.rgb565);
 362       break;
 363    default:
 364       /* format is not supported */
 365       return -1;
 366    }
 367
 368    /* There might be a buffer release already queued that wasn't processed */
 369    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
 370
 371    while (dri2_surf->back == NULL) {
 372       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 373          /* Get an unlocked buffer, preferrably one with a dri_buffer
 374           * already allocated. */
 375          if (dri2_surf->color_buffers[i].locked)
 376             continue;
 377          if (dri2_surf->back == NULL)
 378             dri2_surf->back = &dri2_surf->color_buffers[i];
 379          else if (dri2_surf->back->dri_image == NULL)
 380             dri2_surf->back = &dri2_surf->color_buffers[i];
 381       }
 382
 383       if (dri2_surf->back)
 384          break;
 385
 386       /* If we don't have a buffer, then block on the server to release one for
 387        * us, and try again. wl_display_dispatch_queue will process any pending
 388        * events, however not all servers flush on issuing a buffer release
 389        * event. So, we spam the server with roundtrips as they always cause a
 390        * client flush.
 391        */
 392       if (wl_display_roundtrip_queue(dri2_dpy->wl_dpy,
 393                                      dri2_surf->wl_queue) < 0)
 394           return -1;
 395    }
 396
 397    if (dri2_surf->back == NULL)
 398       return -1;
 399
 400    use_flags = __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_BACKBUFFER;
 401
 402    if (dri2_dpy->is_different_gpu &&
 403        dri2_surf->back->linear_copy == NULL) {
 404       /* The LINEAR modifier should be a perfect alias of the LINEAR use
 405        * flag; try the new interface first before the old, then fall back. */
 406       if (dri2_dpy->image->base.version >= 15 &&
 407            dri2_dpy->image->createImageWithModifiers) {
 408          uint64_t linear_mod = DRM_FORMAT_MOD_LINEAR;
 409
 410          dri2_surf->back->linear_copy =
 411             dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 412                                                       dri2_surf->base.Width,
 413                                                       dri2_surf->base.Height,
 414                                                       dri_image_format,
 415                                                       &linear_mod,
 416                                                       1,
 417                                                       NULL);
 418       } else {
 419          dri2_surf->back->linear_copy =
 420             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 421                                          dri2_surf->base.Width,
 422                                          dri2_surf->base.Height,
 423                                          dri_image_format,
 424                                          use_flags |
 425                                          __DRI_IMAGE_USE_LINEAR,
 426                                          NULL);
 427       }
 428       if (dri2_surf->back->linear_copy == NULL)
 429           return -1;
 430    }
 431
 432    if (dri2_surf->back->dri_image == NULL) {
 433       /* If our DRIImage implementation does not support
 434        * createImageWithModifiers, then fall back to the old createImage,
 435        * and hope it allocates an image which is acceptable to the winsys.
 436         */
 437       if (num_modifiers && dri2_dpy->image->base.version >= 15 &&
 438           dri2_dpy->image->createImageWithModifiers) {
 439          dri2_surf->back->dri_image =
 440            dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 441                                                      dri2_surf->base.Width,
 442                                                      dri2_surf->base.Height,
 443                                                      dri_image_format,
 444                                                      modifiers,
 445                                                      num_modifiers,
 446                                                      NULL);
 447       } else {
 448          dri2_surf->back->dri_image =
 449             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 450                                          dri2_surf->base.Width,
 451                                          dri2_surf->base.Height,
 452                                          dri_image_format,
 453                                          dri2_dpy->is_different_gpu ?
 454                                               0 : use_flags,
 455                                          NULL);
 456       }
 457
 458       dri2_surf->back->age = 0;
 459    }
 460    if (dri2_surf->back->dri_image == NULL)
 461       return -1;
 462
 463    dri2_surf->back->locked = true;
 464
 465    return 0;
 466 }
 467
 468
 469 static void
 470 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 471 {
 472    struct dri2_egl_display *dri2_dpy =
 473       dri2_egl_display(dri2_surf->base.Resource.Display);
 474    __DRIimage *image;
 475    int name, pitch;
 476
 477    image = dri2_surf->back->dri_image;
 478
 479    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 480    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 481
 482    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 483    buffer->name = name;
 484    buffer->pitch = pitch;
 485    buffer->cpp = 4;
 486    buffer->flags = 0;
 487 }
 488
 489 static int
 490 update_buffers(struct dri2_egl_surface *dri2_surf)
 491 {
 492    struct dri2_egl_display *dri2_dpy =
 493       dri2_egl_display(dri2_surf->base.Resource.Display);
 494
 495    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
 496        dri2_surf->base.Height != dri2_surf->wl_win->height) {
 497
 498       dri2_wl_release_buffers(dri2_surf);
 499
 500       dri2_surf->base.Width  = dri2_surf->wl_win->width;
 501       dri2_surf->base.Height = dri2_surf->wl_win->height;
 502       dri2_surf->dx = dri2_surf->wl_win->dx;
 503       dri2_surf->dy = dri2_surf->wl_win->dy;
 504    }
 505
 506    if (get_back_bo(dri2_surf) < 0) {
 507       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 508       return -1;
 509    }
 510
 511    /* If we have an extra unlocked buffer at this point, we had to do triple
 512     * buffering for a while, but now can go back to just double buffering.
 513     * That means we can free any unlocked buffer now. */
 514    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 515       if (!dri2_surf->color_buffers[i].locked &&
 516           dri2_surf->color_buffers[i].wl_buffer) {
 517          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 518          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 519          if (dri2_dpy->is_different_gpu)
 520             dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 521          dri2_surf->color_buffers[i].wl_buffer = NULL;
 522          dri2_surf->color_buffers[i].dri_image = NULL;
 523          dri2_surf->color_buffers[i].linear_copy = NULL;
 524       }
 525    }
 526
 527    return 0;
 528 }
 529
 530 static __DRIbuffer *
 531 dri2_wl_get_buffers_with_format(__DRIdrawable * driDrawable,
 532                                 int *width, int *height,
 533                                 unsigned int *attachments, int count,
 534                                 int *out_count, void *loaderPrivate)
 535 {
 536    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 537    int i, j;
 538
 539    if (update_buffers(dri2_surf) < 0)
 540       return NULL;
 541
 542    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 543       __DRIbuffer *local;
 544
 545       switch (attachments[i]) {
 546       case __DRI_BUFFER_BACK_LEFT:
 547          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 548          break;
 549       default:
 550          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 551                                                      attachments[i + 1]);
 552
 553          if (!local) {
 554             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 555             return NULL;
 556          }
 557          dri2_surf->buffers[j] = *local;
 558          break;
 559       }
 560    }
 561
 562    *out_count = j;
 563    if (j == 0)
 564       return NULL;
 565
 566    *width = dri2_surf->base.Width;
 567    *height = dri2_surf->base.Height;
 568
 569    return dri2_surf->buffers;
 570 }
 571
 572 static __DRIbuffer *
 573 dri2_wl_get_buffers(__DRIdrawable * driDrawable,
 574                     int *width, int *height,
 575                     unsigned int *attachments, int count,
 576                     int *out_count, void *loaderPrivate)
 577 {
 578    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 579    unsigned int *attachments_with_format;
 580    __DRIbuffer *buffer;
 581    unsigned int bpp;
 582
 583    switch (dri2_surf->format) {
 584    case WL_DRM_FORMAT_ARGB8888:
 585    case WL_DRM_FORMAT_XRGB8888:
 586       bpp = 32;
 587       break;
 588    case WL_DRM_FORMAT_RGB565:
 589       bpp = 16;
 590       break;
 591    default:
 592       /* format is not supported */
 593       return NULL;
 594    }
 595
 596    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 597    if (!attachments_with_format) {
 598       *out_count = 0;
 599       return NULL;
 600    }
 601
 602    for (int i = 0; i < count; ++i) {
 603       attachments_with_format[2*i] = attachments[i];
 604       attachments_with_format[2*i + 1] = bpp;
 605    }
 606
 607    buffer =
 608       dri2_wl_get_buffers_with_format(driDrawable,
 609                                       width, height,
 610                                       attachments_with_format, count,
 611                                       out_count, loaderPrivate);
 612
 613    free(attachments_with_format);
 614
 615    return buffer;
 616 }
 617
 618 static int
 619 image_get_buffers(__DRIdrawable *driDrawable,
 620                   unsigned int format,
 621                   uint32_t *stamp,
 622                   void *loaderPrivate,
 623                   uint32_t buffer_mask,
 624                   struct __DRIimageList *buffers)
 625 {
 626    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 627
 628    if (update_buffers(dri2_surf) < 0)
 629       return 0;
 630
 631    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 632    buffers->back = dri2_surf->back->dri_image;
 633
 634    return 1;
 635 }
 636
 637 static void
 638 dri2_wl_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 639 {
 640    (void) driDrawable;
 641    (void) loaderPrivate;
 642 }
 643
 644 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 645    .base = { __DRI_DRI2_LOADER, 3 },
 646
 647    .getBuffers           = dri2_wl_get_buffers,
 648    .flushFrontBuffer     = dri2_wl_flush_front_buffer,
 649    .getBuffersWithFormat = dri2_wl_get_buffers_with_format,
 650 };
 651
 652 static const __DRIimageLoaderExtension image_loader_extension = {
 653    .base = { __DRI_IMAGE_LOADER, 1 },
 654
 655    .getBuffers          = image_get_buffers,
 656    .flushFrontBuffer    = dri2_wl_flush_front_buffer,
 657 };
 658
 659 static void
 660 wayland_throttle_callback(void *data,
 661                           struct wl_callback *callback,
 662                           uint32_t time)
 663 {
 664    struct dri2_egl_surface *dri2_surf = data;
 665
 666    dri2_surf->throttle_callback = NULL;
 667    wl_callback_destroy(callback);
 668 }
 669
 670 static const struct wl_callback_listener throttle_listener = {
 671    .done = wayland_throttle_callback
 672 };
 673
 674 static struct wl_buffer *
 675 create_wl_buffer(struct dri2_egl_display *dri2_dpy,
 676                  struct dri2_egl_surface *dri2_surf,
 677                  __DRIimage *image)
 678 {
 679    struct wl_buffer *ret;
 680    EGLBoolean query;
 681    int width, height, fourcc, num_planes;
 682    uint64_t modifier = DRM_FORMAT_MOD_INVALID;
 683
 684    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_WIDTH, &width);
 685    query &= dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_HEIGHT,
 686                                         &height);
 687    query &= dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FOURCC,
 688                                         &fourcc);
 689    if (!query)
 690       return NULL;
 691
 692    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NUM_PLANES,
 693                                        &num_planes);
 694    if (!query)
 695       num_planes = 1;
 696
 697    if (dri2_dpy->image->base.version >= 15) {
 698       int mod_hi, mod_lo;
 699
 700       query = dri2_dpy->image->queryImage(image,
 701                                           __DRI_IMAGE_ATTRIB_MODIFIER_UPPER,
 702                                           &mod_hi);
 703       query &= dri2_dpy->image->queryImage(image,
 704                                            __DRI_IMAGE_ATTRIB_MODIFIER_LOWER,
 705                                            &mod_lo);
 706       if (query) {
 707          modifier = (uint64_t) mod_hi << 32;
 708          modifier |= (uint64_t) (mod_lo & 0xffffffff);
 709       }
 710    }
 711
 712    if (dri2_dpy->wl_dmabuf && modifier != DRM_FORMAT_MOD_INVALID) {
 713       struct zwp_linux_buffer_params_v1 *params;
 714       int i;
 715
 716       /* We don't need a wrapper for wl_dmabuf objects, because we have to
 717        * create the intermediate params object; we can set the queue on this,
 718        * and the wl_buffer inherits it race-free. */
 719       params = zwp_linux_dmabuf_v1_create_params(dri2_dpy->wl_dmabuf);
 720       if (dri2_surf)
 721          wl_proxy_set_queue((struct wl_proxy *) params, dri2_surf->wl_queue);
 722
 723       for (i = 0; i < num_planes; i++) {
 724          __DRIimage *p_image;
 725          int stride, offset;
 726          int fd = -1;
 727
 728          if (i == 0)
 729             p_image = image;
 730          else
 731             p_image = dri2_dpy->image->fromPlanar(image, i, NULL);
 732          if (!p_image) {
 733             zwp_linux_buffer_params_v1_destroy(params);
 734             return NULL;
 735          }
 736
 737          query = dri2_dpy->image->queryImage(p_image,
 738                                              __DRI_IMAGE_ATTRIB_FD,
 739                                              &fd);
 740          query &= dri2_dpy->image->queryImage(p_image,
 741                                               __DRI_IMAGE_ATTRIB_STRIDE,
 742                                               &stride);
 743          query &= dri2_dpy->image->queryImage(p_image,
 744                                               __DRI_IMAGE_ATTRIB_OFFSET,
 745                                               &offset);
 746          if (image != p_image)
 747             dri2_dpy->image->destroyImage(p_image);
 748
 749          if (!query) {
 750             if (fd >= 0)
 751                close(fd);
 752             zwp_linux_buffer_params_v1_destroy(params);
 753             return NULL;
 754          }
 755
 756          zwp_linux_buffer_params_v1_add(params, fd, i, offset, stride,
 757                                         modifier >> 32, modifier & 0xffffffff);
 758          close(fd);
 759       }
 760
 761       ret = zwp_linux_buffer_params_v1_create_immed(params, width, height,
 762                                                     fourcc, 0);
 763       zwp_linux_buffer_params_v1_destroy(params);
 764    } else if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 765       struct wl_drm *wl_drm =
 766          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 767       int fd, stride;
 768
 769       if (num_planes > 1)
 770          return NULL;
 771
 772       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 773       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 774       ret = wl_drm_create_prime_buffer(wl_drm, fd, width, height, fourcc, 0,
 775                                        stride, 0, 0, 0, 0);
 776       close(fd);
 777    } else {
 778       struct wl_drm *wl_drm =
 779          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 780       int name, stride;
 781
 782       if (num_planes > 1)
 783          return NULL;
 784
 785       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 786       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 787       ret = wl_drm_create_buffer(wl_drm, name, width, height, stride, fourcc);
 788    }
 789
 790    return ret;
 791 }
 792
 793 static EGLBoolean
 794 try_damage_buffer(struct dri2_egl_surface *dri2_surf,
 795                   const EGLint *rects,
 796                   EGLint n_rects)
 797 {
 798    if (wl_proxy_get_version((struct wl_proxy *) dri2_surf->wl_surface_wrapper)
 799        < WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION)
 800       return EGL_FALSE;
 801
 802    for (int i = 0; i < n_rects; i++) {
 803       const int *rect = &rects[i * 4];
 804
 805       wl_surface_damage_buffer(dri2_surf->wl_surface_wrapper,
 806                                rect[0],
 807                                dri2_surf->base.Height - rect[1] - rect[3],
 808                                rect[2], rect[3]);
 809    }
 810    return EGL_TRUE;
 811 }
 812 /**
 813  * Called via eglSwapBuffers(), drv->API.SwapBuffers().
 814  */
 815 static EGLBoolean
 816 dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
 817                                  _EGLDisplay *disp,
 818                                  _EGLSurface *draw,
 819                                  const EGLint *rects,
 820                                  EGLint n_rects)
 821 {
 822    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 823    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 824
 825    while (dri2_surf->throttle_callback != NULL)
 826       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
 827                                     dri2_surf->wl_queue) == -1)
 828          return -1;
 829
 830    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 831       if (dri2_surf->color_buffers[i].age > 0)
 832          dri2_surf->color_buffers[i].age++;
 833
 834    /* Make sure we have a back buffer in case we're swapping without ever
 835     * rendering. */
 836    if (get_back_bo(dri2_surf) < 0)
 837       return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 838
 839    if (draw->SwapInterval > 0) {
 840       dri2_surf->throttle_callback =
 841          wl_surface_frame(dri2_surf->wl_surface_wrapper);
 842       wl_callback_add_listener(dri2_surf->throttle_callback,
 843                                &throttle_listener, dri2_surf);
 844    }
 845
 846    dri2_surf->back->age = 1;
 847    dri2_surf->current = dri2_surf->back;
 848    dri2_surf->back = NULL;
 849
 850    if (!dri2_surf->current->wl_buffer) {
 851       __DRIimage *image;
 852
 853       if (dri2_dpy->is_different_gpu)
 854          image = dri2_surf->current->linear_copy;
 855       else
 856          image = dri2_surf->current->dri_image;
 857
 858       dri2_surf->current->wl_buffer =
 859          create_wl_buffer(dri2_dpy, dri2_surf, image);
 860
 861       wl_buffer_add_listener(dri2_surf->current->wl_buffer,
 862                              &wl_buffer_listener, dri2_surf);
 863    }
 864
 865    wl_surface_attach(dri2_surf->wl_surface_wrapper,
 866                      dri2_surf->current->wl_buffer,
 867                      dri2_surf->dx, dri2_surf->dy);
 868
 869    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
 870    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
 871    /* reset resize growing parameters */
 872    dri2_surf->dx = 0;
 873    dri2_surf->dy = 0;
 874
 875    /* If the compositor doesn't support damage_buffer, we deliberately
 876     * ignore the damage region and post maximum damage, due to
 877     * https://bugs.freedesktop.org/78190 */
 878    if (!n_rects || !try_damage_buffer(dri2_surf, rects, n_rects))
 879       wl_surface_damage(dri2_surf->wl_surface_wrapper,
 880                         0, 0, INT32_MAX, INT32_MAX);
 881
 882    if (dri2_dpy->is_different_gpu) {
 883       _EGLContext *ctx = _eglGetCurrentContext();
 884       struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 885       dri2_dpy->image->blitImage(dri2_ctx->dri_context,
 886                                  dri2_surf->current->linear_copy,
 887                                  dri2_surf->current->dri_image,
 888                                  0, 0, dri2_surf->base.Width,
 889                                  dri2_surf->base.Height,
 890                                  0, 0, dri2_surf->base.Width,
 891                                  dri2_surf->base.Height, 0);
 892    }
 893
 894    dri2_flush_drawable_for_swapbuffers(disp, draw);
 895    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 896
 897    wl_surface_commit(dri2_surf->wl_surface_wrapper);
 898
 899    /* If we're not waiting for a frame callback then we'll at least throttle
 900     * to a sync callback so that we always give a chance for the compositor to
 901     * handle the commit and send a release event before checking for a free
 902     * buffer */
 903    if (dri2_surf->throttle_callback == NULL) {
 904       dri2_surf->throttle_callback = wl_display_sync(dri2_surf->wl_dpy_wrapper);
 905       wl_callback_add_listener(dri2_surf->throttle_callback,
 906                                &throttle_listener, dri2_surf);
 907    }
 908
 909    wl_display_flush(dri2_dpy->wl_dpy);
 910
 911    return EGL_TRUE;
 912 }
 913
 914 static EGLint
 915 dri2_wl_query_buffer_age(_EGLDriver *drv,
 916                          _EGLDisplay *disp, _EGLSurface *surface)
 917 {
 918    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 919
 920    if (get_back_bo(dri2_surf) < 0) {
 921       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 922       return -1;
 923    }
 924
 925    return dri2_surf->back->age;
 926 }
 927
 928 static EGLBoolean
 929 dri2_wl_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 930 {
 931    return dri2_wl_swap_buffers_with_damage(drv, disp, draw, NULL, 0);
 932 }
 933
 934 static struct wl_buffer *
 935 dri2_wl_create_wayland_buffer_from_image(_EGLDriver *drv,
 936                                           _EGLDisplay *disp,
 937                                           _EGLImage *img)
 938 {
 939    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 940    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
 941    __DRIimage *image = dri2_img->dri_image;
 942    struct wl_buffer *buffer;
 943    int format;
 944
 945    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &format);
 946    switch (format) {
 947    case __DRI_IMAGE_FORMAT_ARGB8888:
 948       if (!(dri2_dpy->formats & HAS_ARGB8888))
 949          goto bad_format;
 950       break;
 951    case __DRI_IMAGE_FORMAT_XRGB8888:
 952       if (!(dri2_dpy->formats & HAS_XRGB8888))
 953          goto bad_format;
 954       break;
 955    default:
 956       goto bad_format;
 957    }
 958
 959    buffer = create_wl_buffer(dri2_dpy, NULL, image);
 960
 961    /* The buffer object will have been created with our internal event queue
 962     * because it is using wl_dmabuf/wl_drm as a proxy factory. We want the
 963     * buffer to be used by the application so we'll reset it to the display's
 964     * default event queue. This isn't actually racy, as the only event the
 965     * buffer can get is a buffer release, which doesn't happen with an explicit
 966     * attach. */
 967    if (buffer)
 968       wl_proxy_set_queue((struct wl_proxy *) buffer, NULL);
 969
 970    return buffer;
 971
 972 bad_format:
 973    _eglError(EGL_BAD_MATCH, "unsupported image format");
 974    return NULL;
 975 }
 976
 977 static int
 978 dri2_wl_authenticate(_EGLDisplay *disp, uint32_t id)
 979 {
 980    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 981    int ret = 0;
 982
 983    if (dri2_dpy->is_render_node) {
 984       _eglLog(_EGL_WARNING, "wayland-egl: client asks server to "
 985                             "authenticate for render-nodes");
 986       return 0;
 987    }
 988    dri2_dpy->authenticated = false;
 989
 990    wl_drm_authenticate(dri2_dpy->wl_drm, id);
 991    if (roundtrip(dri2_dpy) < 0)
 992       ret = -1;
 993
 994    if (!dri2_dpy->authenticated)
 995       ret = -1;
 996
 997    /* reset authenticated */
 998    dri2_dpy->authenticated = true;
 999
1000    return ret;
1001 }
1002
1003 static void
1004 drm_handle_device(void *data, struct wl_drm *drm, const char *device)
1005 {
1006    struct dri2_egl_display *dri2_dpy = data;
1007    drm_magic_t magic;
1008
1009    dri2_dpy->device_name = strdup(device);
1010    if (!dri2_dpy->device_name)
1011       return;
1012
1013    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
1014    if (dri2_dpy->fd == -1) {
1015       _eglLog(_EGL_WARNING, "wayland-egl: could not open %s (%s)",
1016               dri2_dpy->device_name, strerror(errno));
1017       return;
1018    }
1019
1020    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
1021       dri2_dpy->authenticated = true;
1022    } else {
1023       drmGetMagic(dri2_dpy->fd, &magic);
1024       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
1025    }
1026 }
1027
1028 static void
1029 drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
1030 {
1031    struct dri2_egl_display *dri2_dpy = data;
1032
1033    switch (format) {
1034    case WL_DRM_FORMAT_ARGB8888:
1035       dri2_dpy->formats |= HAS_ARGB8888;
1036       break;
1037    case WL_DRM_FORMAT_XRGB8888:
1038       dri2_dpy->formats |= HAS_XRGB8888;
1039       break;
1040    case WL_DRM_FORMAT_RGB565:
1041       dri2_dpy->formats |= HAS_RGB565;
1042       break;
1043    }
1044 }
1045
1046 static void
1047 drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
1048 {
1049    struct dri2_egl_display *dri2_dpy = data;
1050
1051    dri2_dpy->capabilities = value;
1052 }
1053
1054 static void
1055 drm_handle_authenticated(void *data, struct wl_drm *drm)
1056 {
1057    struct dri2_egl_display *dri2_dpy = data;
1058
1059    dri2_dpy->authenticated = true;
1060 }
1061
1062 static const struct wl_drm_listener drm_listener = {
1063    .device = drm_handle_device,
1064    .format = drm_handle_format,
1065    .authenticated = drm_handle_authenticated,
1066    .capabilities = drm_handle_capabilities
1067 };
1068
1069 static void
1070 dmabuf_ignore_format(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1071                      uint32_t format)
1072 {
1073    /* formats are implicitly advertised by the 'modifier' event, so ignore */
1074 }
1075
1076 static void
1077 dmabuf_handle_modifier(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1078                        uint32_t format, uint32_t modifier_hi,
1079                        uint32_t modifier_lo)
1080 {
1081    struct dri2_egl_display *dri2_dpy = data;
1082    uint64_t *mod = NULL;
1083
1084    if (modifier_hi == (DRM_FORMAT_MOD_INVALID >> 32) &&
1085        modifier_lo == (DRM_FORMAT_MOD_INVALID & 0xffffffff))
1086       return;
1087
1088    switch (format) {
1089    case WL_DRM_FORMAT_ARGB8888:
1090       mod = u_vector_add(&dri2_dpy->wl_modifiers.argb8888);
1091       dri2_dpy->formats |= HAS_ARGB8888;
1092       break;
1093    case WL_DRM_FORMAT_XRGB8888:
1094       mod = u_vector_add(&dri2_dpy->wl_modifiers.xrgb8888);
1095       dri2_dpy->formats |= HAS_XRGB8888;
1096       break;
1097    case WL_DRM_FORMAT_RGB565:
1098       mod = u_vector_add(&dri2_dpy->wl_modifiers.rgb565);
1099       dri2_dpy->formats |= HAS_RGB565;
1100       break;
1101    default:
1102       break;
1103    }
1104
1105    if (!mod)
1106       return;
1107
1108    *mod = (uint64_t) modifier_hi << 32;
1109    *mod |= (uint64_t) (modifier_lo & 0xffffffff);
1110 }
1111
1112 static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
1113    .format = dmabuf_ignore_format,
1114    .modifier = dmabuf_handle_modifier,
1115 };
1116
1117 static void
1118 registry_handle_global_drm(void *data, struct wl_registry *registry,
1119                            uint32_t name, const char *interface,
1120                            uint32_t version)
1121 {
1122    struct dri2_egl_display *dri2_dpy = data;
1123
1124    if (strcmp(interface, "wl_drm") == 0) {
1125       dri2_dpy->wl_drm =
1126          wl_registry_bind(registry, name, &wl_drm_interface, MIN2(version, 2));
1127       wl_drm_add_listener(dri2_dpy->wl_drm, &drm_listener, dri2_dpy);
1128    } else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0 && version >= 3) {
1129       dri2_dpy->wl_dmabuf =
1130          wl_registry_bind(registry, name, &zwp_linux_dmabuf_v1_interface,
1131                           MIN2(version, 3));
1132       zwp_linux_dmabuf_v1_add_listener(dri2_dpy->wl_dmabuf, &dmabuf_listener,
1133                                        dri2_dpy);
1134    }
1135 }
1136
1137 static void
1138 registry_handle_global_remove(void *data, struct wl_registry *registry,
1139                               uint32_t name)
1140 {
1141 }
1142
1143 static const struct wl_registry_listener registry_listener_drm = {
1144    .global = registry_handle_global_drm,
1145    .global_remove = registry_handle_global_remove
1146 };
1147
1148 static void
1149 dri2_wl_setup_swap_interval(_EGLDisplay *disp)
1150 {
1151    /* We can't use values greater than 1 on Wayland because we are using the
1152     * frame callback to synchronise the frame and the only way we be sure to
1153     * get a frame callback is to attach a new buffer. Therefore we can't just
1154     * sit drawing nothing to wait until the next ‘n’ frame callbacks */
1155
1156    dri2_setup_swap_interval(disp, 1);
1157 }
1158
1159 static const struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
1160    .authenticate = dri2_wl_authenticate,
1161    .create_window_surface = dri2_wl_create_window_surface,
1162    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1163    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1164    .destroy_surface = dri2_wl_destroy_surface,
1165    .create_image = dri2_create_image_khr,
1166    .swap_buffers = dri2_wl_swap_buffers,
1167    .swap_buffers_with_damage = dri2_wl_swap_buffers_with_damage,
1168    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1169    .set_damage_region = dri2_fallback_set_damage_region,
1170    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1171    .copy_buffers = dri2_fallback_copy_buffers,
1172    .query_buffer_age = dri2_wl_query_buffer_age,
1173    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
1174    .get_sync_values = dri2_fallback_get_sync_values,
1175    .get_dri_drawable = dri2_surface_get_dri_drawable,
1176 };
1177
1178 static const __DRIextension *dri2_loader_extensions[] = {
1179    &dri2_loader_extension.base,
1180    &image_loader_extension.base,
1181    &image_lookup_extension.base,
1182    &use_invalidate.base,
1183    NULL,
1184 };
1185
1186 static const __DRIextension *image_loader_extensions[] = {
1187    &image_loader_extension.base,
1188    &image_lookup_extension.base,
1189    &use_invalidate.base,
1190    NULL,
1191 };
1192
1193 static EGLBoolean
1194 dri2_wl_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
1195 {
1196    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1197    static const struct {
1198       const char *format_name;
1199       int has_format;
1200       unsigned int rgba_masks[4];
1201    } visuals[] = {
1202       { "XRGB8888", HAS_XRGB8888, { 0xff0000, 0xff00, 0x00ff, 0xff000000 } },
1203       { "ARGB8888", HAS_ARGB8888, { 0xff0000, 0xff00, 0x00ff, 0 } },
1204       { "RGB565",   HAS_RGB565,   { 0x00f800, 0x07e0, 0x001f, 0 } },
1205    };
1206    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
1207    unsigned int count = 0;
1208
1209    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
1210       for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
1211          struct dri2_egl_config *dri2_conf;
1212
1213          if (!(dri2_dpy->formats & visuals[j].has_format))
1214             continue;
1215
1216          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1217                count + 1, EGL_WINDOW_BIT, NULL, visuals[j].rgba_masks);
1218          if (dri2_conf) {
1219             if (dri2_conf->base.ConfigID == count + 1)
1220                count++;
1221             format_count[j]++;
1222          }
1223       }
1224    }
1225
1226    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
1227       if (!format_count[i]) {
1228          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
1229                  visuals[i].format_name);
1230       }
1231    }
1232
1233    return (count != 0);
1234 }
1235
1236 static EGLBoolean
1237 dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
1238 {
1239    struct dri2_egl_display *dri2_dpy;
1240
1241    loader_set_logger(_eglLog);
1242
1243    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1244    if (!dri2_dpy)
1245       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1246
1247    dri2_dpy->fd = -1;
1248    disp->DriverData = (void *) dri2_dpy;
1249    if (disp->PlatformDisplay == NULL) {
1250       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1251       if (dri2_dpy->wl_dpy == NULL)
1252          goto cleanup;
1253       dri2_dpy->own_device = true;
1254    } else {
1255       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1256    }
1257
1258    if (!u_vector_init(&dri2_dpy->wl_modifiers.xrgb8888, sizeof(uint64_t), 32) ||
1259        !u_vector_init(&dri2_dpy->wl_modifiers.argb8888, sizeof(uint64_t), 32) ||
1260        !u_vector_init(&dri2_dpy->wl_modifiers.rgb565, sizeof(uint64_t), 32)) {
1261       goto cleanup;
1262    }
1263
1264    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1265
1266    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1267    if (dri2_dpy->wl_dpy_wrapper == NULL)
1268       goto cleanup;
1269
1270    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1271                       dri2_dpy->wl_queue);
1272
1273    if (dri2_dpy->own_device)
1274       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1275
1276    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1277    wl_registry_add_listener(dri2_dpy->wl_registry,
1278                             &registry_listener_drm, dri2_dpy);
1279    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_drm == NULL)
1280       goto cleanup;
1281
1282    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->fd == -1)
1283       goto cleanup;
1284
1285    if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
1286       goto cleanup;
1287
1288    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
1289                                                &dri2_dpy->is_different_gpu);
1290    if (dri2_dpy->is_different_gpu) {
1291       free(dri2_dpy->device_name);
1292       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
1293       if (!dri2_dpy->device_name) {
1294          _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
1295                                   "for requested GPU");
1296          goto cleanup;
1297       }
1298    }
1299
1300    /* we have to do the check now, because loader_get_user_preferred_fd
1301     * will return a render-node when the requested gpu is different
1302     * to the server, but also if the client asks for the same gpu than
1303     * the server by requesting its pci-id */
1304    dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
1305
1306    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
1307    if (dri2_dpy->driver_name == NULL) {
1308       _eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
1309       goto cleanup;
1310    }
1311
1312    /* render nodes cannot use Gem names, and thus do not support
1313     * the __DRI_DRI2_LOADER extension */
1314    if (!dri2_dpy->is_render_node) {
1315       dri2_dpy->loader_extensions = dri2_loader_extensions;
1316       if (!dri2_load_driver(disp)) {
1317          _eglError(EGL_BAD_ALLOC, "DRI2: failed to load driver");
1318          goto cleanup;
1319       }
1320    } else {
1321       dri2_dpy->loader_extensions = image_loader_extensions;
1322       if (!dri2_load_driver_dri3(disp)) {
1323          _eglError(EGL_BAD_ALLOC, "DRI3: failed to load driver");
1324          goto cleanup;
1325       }
1326    }
1327
1328    if (!dri2_create_screen(disp))
1329       goto cleanup;
1330
1331    if (!dri2_setup_extensions(disp))
1332       goto cleanup;
1333
1334    dri2_setup_screen(disp);
1335
1336    dri2_wl_setup_swap_interval(disp);
1337
1338    /* To use Prime, we must have _DRI_IMAGE v7 at least.
1339     * createImageFromFds support indicates that Prime export/import
1340     * is supported by the driver. Fall back to
1341     * gem names if we don't have Prime support. */
1342
1343    if (dri2_dpy->image->base.version < 7 ||
1344        dri2_dpy->image->createImageFromFds == NULL)
1345       dri2_dpy->capabilities &= ~WL_DRM_CAPABILITY_PRIME;
1346
1347    /* We cannot use Gem names with render-nodes, only prime fds (dma-buf).
1348     * The server needs to accept them */
1349    if (dri2_dpy->is_render_node &&
1350        !(dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME)) {
1351       _eglLog(_EGL_WARNING, "wayland-egl: display is not render-node capable");
1352       goto cleanup;
1353    }
1354
1355    if (dri2_dpy->is_different_gpu &&
1356        (dri2_dpy->image->base.version < 9 ||
1357         dri2_dpy->image->blitImage == NULL)) {
1358       _eglLog(_EGL_WARNING, "wayland-egl: Different GPU selected, but the "
1359                             "Image extension in the driver is not "
1360                             "compatible. Version 9 or later and blitImage() "
1361                             "are required");
1362       goto cleanup;
1363    }
1364
1365    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1366       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1367       goto cleanup;
1368    }
1369
1370    dri2_set_WL_bind_wayland_display(drv, disp);
1371    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
1372     * because the buffer of the EGLImage has likely a tiling mode the server
1373     * gpu won't support. These is no way to check for now. Thus do not support the
1374     * extension */
1375    if (!dri2_dpy->is_different_gpu)
1376       disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
1377
1378    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1379
1380    disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
1381
1382    /* Fill vtbl last to prevent accidentally calling virtual function during
1383     * initialization.
1384     */
1385    dri2_dpy->vtbl = &dri2_wl_display_vtbl;
1386
1387    return EGL_TRUE;
1388
1389  cleanup:
1390    dri2_display_destroy(disp);
1391    return EGL_FALSE;
1392 }
1393
1394 static int
1395 dri2_wl_swrast_get_stride_for_format(int format, int w)
1396 {
1397    if (format == WL_SHM_FORMAT_RGB565)
1398       return 2 * w;
1399    else /* ARGB8888 || XRGB8888 */
1400       return 4 * w;
1401 }
1402
1403 /*
1404  * Taken from weston shared/os-compatibility.c
1405  */
1406
1407 #ifndef HAVE_MKOSTEMP
1408
1409 static int
1410 set_cloexec_or_close(int fd)
1411 {
1412    long flags;
1413
1414    if (fd == -1)
1415       return -1;
1416
1417    flags = fcntl(fd, F_GETFD);
1418    if (flags == -1)
1419       goto err;
1420
1421    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
1422       goto err;
1423
1424    return fd;
1425
1426 err:
1427    close(fd);
1428    return -1;
1429 }
1430
1431 #endif
1432
1433 /*
1434  * Taken from weston shared/os-compatibility.c
1435  */
1436
1437 static int
1438 create_tmpfile_cloexec(char *tmpname)
1439 {
1440    int fd;
1441
1442 #ifdef HAVE_MKOSTEMP
1443    fd = mkostemp(tmpname, O_CLOEXEC);
1444    if (fd >= 0)
1445       unlink(tmpname);
1446 #else
1447    fd = mkstemp(tmpname);
1448    if (fd >= 0) {
1449       fd = set_cloexec_or_close(fd);
1450       unlink(tmpname);
1451    }
1452 #endif
1453
1454    return fd;
1455 }
1456
1457 /*
1458  * Taken from weston shared/os-compatibility.c
1459  *
1460  * Create a new, unique, anonymous file of the given size, and
1461  * return the file descriptor for it. The file descriptor is set
1462  * CLOEXEC. The file is immediately suitable for mmap()'ing
1463  * the given size at offset zero.
1464  *
1465  * The file should not have a permanent backing store like a disk,
1466  * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
1467  *
1468  * The file name is deleted from the file system.
1469  *
1470  * The file is suitable for buffer sharing between processes by
1471  * transmitting the file descriptor over Unix sockets using the
1472  * SCM_RIGHTS methods.
1473  *
1474  * If the C library implements posix_fallocate(), it is used to
1475  * guarantee that disk space is available for the file at the
1476  * given size. If disk space is insufficent, errno is set to ENOSPC.
1477  * If posix_fallocate() is not supported, program may receive
1478  * SIGBUS on accessing mmap()'ed file contents instead.
1479  */
1480 static int
1481 os_create_anonymous_file(off_t size)
1482 {
1483    static const char templ[] = "/mesa-shared-XXXXXX";
1484    const char *path;
1485    char *name;
1486    int fd;
1487    int ret;
1488
1489    path = getenv("XDG_RUNTIME_DIR");
1490    if (!path) {
1491       errno = ENOENT;
1492       return -1;
1493    }
1494
1495    name = malloc(strlen(path) + sizeof(templ));
1496    if (!name)
1497       return -1;
1498
1499    strcpy(name, path);
1500    strcat(name, templ);
1501
1502    fd = create_tmpfile_cloexec(name);
1503
1504    free(name);
1505
1506    if (fd < 0)
1507       return -1;
1508
1509    ret = ftruncate(fd, size);
1510    if (ret < 0) {
1511       close(fd);
1512       return -1;
1513    }
1514
1515    return fd;
1516 }
1517
1518
1519 static EGLBoolean
1520 dri2_wl_swrast_allocate_buffer(struct dri2_egl_surface *dri2_surf,
1521                                int format, int w, int h,
1522                                void **data, int *size,
1523                                struct wl_buffer **buffer)
1524 {
1525    struct dri2_egl_display *dri2_dpy =
1526       dri2_egl_display(dri2_surf->base.Resource.Display);
1527    struct wl_shm_pool *pool;
1528    int fd, stride, size_map;
1529    void *data_map;
1530
1531    stride = dri2_wl_swrast_get_stride_for_format(format, w);
1532    size_map = h * stride;
1533
1534    /* Create a sharable buffer */
1535    fd = os_create_anonymous_file(size_map);
1536    if (fd < 0)
1537       return EGL_FALSE;
1538
1539    data_map = mmap(NULL, size_map, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1540    if (data_map == MAP_FAILED) {
1541       close(fd);
1542       return EGL_FALSE;
1543    }
1544
1545    /* Share it in a wl_buffer */
1546    pool = wl_shm_create_pool(dri2_dpy->wl_shm, fd, size_map);
1547    wl_proxy_set_queue((struct wl_proxy *)pool, dri2_surf->wl_queue);
1548    *buffer = wl_shm_pool_create_buffer(pool, 0, w, h, stride, format);
1549    wl_shm_pool_destroy(pool);
1550    close(fd);
1551
1552    *data = data_map;
1553    *size = size_map;
1554    return EGL_TRUE;
1555 }
1556
1557 static int
1558 swrast_update_buffers(struct dri2_egl_surface *dri2_surf)
1559 {
1560    struct dri2_egl_display *dri2_dpy =
1561       dri2_egl_display(dri2_surf->base.Resource.Display);
1562
1563    /* we need to do the following operations only once per frame */
1564    if (dri2_surf->back)
1565       return 0;
1566
1567    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
1568        dri2_surf->base.Height != dri2_surf->wl_win->height) {
1569
1570       dri2_wl_release_buffers(dri2_surf);
1571
1572       dri2_surf->base.Width  = dri2_surf->wl_win->width;
1573       dri2_surf->base.Height = dri2_surf->wl_win->height;
1574       dri2_surf->dx = dri2_surf->wl_win->dx;
1575       dri2_surf->dy = dri2_surf->wl_win->dy;
1576       dri2_surf->current = NULL;
1577    }
1578
1579    /* find back buffer */
1580
1581    /* There might be a buffer release already queued that wasn't processed */
1582    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
1583
1584    /* try get free buffer already created */
1585    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1586       if (!dri2_surf->color_buffers[i].locked &&
1587           dri2_surf->color_buffers[i].wl_buffer) {
1588           dri2_surf->back = &dri2_surf->color_buffers[i];
1589           break;
1590       }
1591    }
1592
1593    /* else choose any another free location */
1594    if (!dri2_surf->back) {
1595       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1596          if (!dri2_surf->color_buffers[i].locked) {
1597              dri2_surf->back = &dri2_surf->color_buffers[i];
1598              if (!dri2_wl_swrast_allocate_buffer(dri2_surf,
1599                                                  dri2_surf->format,
1600                                                  dri2_surf->base.Width,
1601                                                  dri2_surf->base.Height,
1602                                                  &dri2_surf->back->data,
1603                                                  &dri2_surf->back->data_size,
1604                                                  &dri2_surf->back->wl_buffer)) {
1605                 _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
1606                  return -1;
1607              }
1608              wl_buffer_add_listener(dri2_surf->back->wl_buffer,
1609                                     &wl_buffer_listener, dri2_surf);
1610              break;
1611          }
1612       }
1613    }
1614
1615    if (!dri2_surf->back) {
1616       _eglError(EGL_BAD_ALLOC, "failed to find free buffer");
1617       return -1;
1618    }
1619
1620    dri2_surf->back->locked = true;
1621
1622    /* If we have an extra unlocked buffer at this point, we had to do triple
1623     * buffering for a while, but now can go back to just double buffering.
1624     * That means we can free any unlocked buffer now. */
1625    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1626       if (!dri2_surf->color_buffers[i].locked &&
1627           dri2_surf->color_buffers[i].wl_buffer) {
1628          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
1629          munmap(dri2_surf->color_buffers[i].data,
1630                 dri2_surf->color_buffers[i].data_size);
1631          dri2_surf->color_buffers[i].wl_buffer = NULL;
1632          dri2_surf->color_buffers[i].data = NULL;
1633       }
1634    }
1635
1636    return 0;
1637 }
1638
1639 static void*
1640 dri2_wl_swrast_get_frontbuffer_data(struct dri2_egl_surface *dri2_surf)
1641 {
1642    /* if there has been a resize: */
1643    if (!dri2_surf->current)
1644       return NULL;
1645
1646    return dri2_surf->current->data;
1647 }
1648
1649 static void*
1650 dri2_wl_swrast_get_backbuffer_data(struct dri2_egl_surface *dri2_surf)
1651 {
1652    assert(dri2_surf->back);
1653    return dri2_surf->back->data;
1654 }
1655
1656 static void
1657 dri2_wl_swrast_commit_backbuffer(struct dri2_egl_surface *dri2_surf)
1658 {
1659    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
1660
1661    while (dri2_surf->throttle_callback != NULL)
1662       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1663                                     dri2_surf->wl_queue) == -1)
1664          return;
1665
1666    if (dri2_surf->base.SwapInterval > 0) {
1667       dri2_surf->throttle_callback =
1668          wl_surface_frame(dri2_surf->wl_surface_wrapper);
1669       wl_callback_add_listener(dri2_surf->throttle_callback,
1670                                &throttle_listener, dri2_surf);
1671    }
1672
1673    dri2_surf->current = dri2_surf->back;
1674    dri2_surf->back = NULL;
1675
1676    wl_surface_attach(dri2_surf->wl_surface_wrapper,
1677                      dri2_surf->current->wl_buffer,
1678                      dri2_surf->dx, dri2_surf->dy);
1679
1680    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1681    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1682    /* reset resize growing parameters */
1683    dri2_surf->dx = 0;
1684    dri2_surf->dy = 0;
1685
1686    wl_surface_damage(dri2_surf->wl_surface_wrapper,
1687                      0, 0, INT32_MAX, INT32_MAX);
1688    wl_surface_commit(dri2_surf->wl_surface_wrapper);
1689
1690    /* If we're not waiting for a frame callback then we'll at least throttle
1691     * to a sync callback so that we always give a chance for the compositor to
1692     * handle the commit and send a release event before checking for a free
1693     * buffer */
1694    if (dri2_surf->throttle_callback == NULL) {
1695       dri2_surf->throttle_callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
1696       wl_callback_add_listener(dri2_surf->throttle_callback,
1697                                &throttle_listener, dri2_surf);
1698    }
1699
1700    wl_display_flush(dri2_dpy->wl_dpy);
1701 }
1702
1703 static void
1704 dri2_wl_swrast_get_drawable_info(__DRIdrawable * draw,
1705                                  int *x, int *y, int *w, int *h,
1706                                  void *loaderPrivate)
1707 {
1708    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1709
1710    (void) swrast_update_buffers(dri2_surf);
1711    *x = 0;
1712    *y = 0;
1713    *w = dri2_surf->base.Width;
1714    *h = dri2_surf->base.Height;
1715 }
1716
1717 static void
1718 dri2_wl_swrast_get_image(__DRIdrawable * read,
1719                          int x, int y, int w, int h,
1720                          char *data, void *loaderPrivate)
1721 {
1722    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1723    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1724    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1725    int src_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1726    int dst_stride = copy_width;
1727    char *src, *dst;
1728
1729    src = dri2_wl_swrast_get_frontbuffer_data(dri2_surf);
1730    if (!src) {
1731       memset(data, 0, copy_width * h);
1732       return;
1733    }
1734
1735    assert(data != src);
1736    assert(copy_width <= src_stride);
1737
1738    src += x_offset;
1739    src += y * src_stride;
1740    dst = data;
1741
1742    if (copy_width > src_stride-x_offset)
1743       copy_width = src_stride-x_offset;
1744    if (h > dri2_surf->base.Height-y)
1745       h = dri2_surf->base.Height-y;
1746
1747    for (; h>0; h--) {
1748       memcpy(dst, src, copy_width);
1749       src += src_stride;
1750       dst += dst_stride;
1751    }
1752 }
1753
1754 static void
1755 dri2_wl_swrast_put_image2(__DRIdrawable * draw, int op,
1756                          int x, int y, int w, int h, int stride,
1757                          char *data, void *loaderPrivate)
1758 {
1759    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1760    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1761    int dst_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1762    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1763    char *src, *dst;
1764
1765    assert(copy_width <= stride);
1766
1767    (void) swrast_update_buffers(dri2_surf);
1768    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
1769
1770    /* partial copy, copy old content */
1771    if (copy_width < dst_stride)
1772       dri2_wl_swrast_get_image(draw, 0, 0,
1773                                dri2_surf->base.Width, dri2_surf->base.Height,
1774                                dst, loaderPrivate);
1775
1776    dst += x_offset;
1777    dst += y * dst_stride;
1778
1779    src = data;
1780
1781    /* drivers expect we do these checks (and some rely on it) */
1782    if (copy_width > dst_stride-x_offset)
1783       copy_width = dst_stride-x_offset;
1784    if (h > dri2_surf->base.Height-y)
1785       h = dri2_surf->base.Height-y;
1786
1787    for (; h>0; h--) {
1788       memcpy(dst, src, copy_width);
1789       src += stride;
1790       dst += dst_stride;
1791    }
1792    dri2_wl_swrast_commit_backbuffer(dri2_surf);
1793 }
1794
1795 static void
1796 dri2_wl_swrast_put_image(__DRIdrawable * draw, int op,
1797                          int x, int y, int w, int h,
1798                          char *data, void *loaderPrivate)
1799 {
1800    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1801    int stride;
1802
1803    stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1804    dri2_wl_swrast_put_image2(draw, op, x, y, w, h,
1805                              stride, data, loaderPrivate);
1806 }
1807
1808 static EGLBoolean
1809 dri2_wl_swrast_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1810 {
1811    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1812    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1813
1814    dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1815    return EGL_TRUE;
1816 }
1817
1818 static void
1819 shm_handle_format(void *data, struct wl_shm *shm, uint32_t format)
1820 {
1821    struct dri2_egl_display *dri2_dpy = data;
1822
1823    switch (format) {
1824    case WL_SHM_FORMAT_ARGB8888:
1825       dri2_dpy->formats |= HAS_ARGB8888;
1826       break;
1827    case WL_SHM_FORMAT_XRGB8888:
1828       dri2_dpy->formats |= HAS_XRGB8888;
1829       break;
1830    case WL_SHM_FORMAT_RGB565:
1831       dri2_dpy->formats |= HAS_RGB565;
1832       break;
1833    }
1834 }
1835
1836 static const struct wl_shm_listener shm_listener = {
1837    .format = shm_handle_format
1838 };
1839
1840 static void
1841 registry_handle_global_swrast(void *data, struct wl_registry *registry,
1842                               uint32_t name, const char *interface,
1843                               uint32_t version)
1844 {
1845    struct dri2_egl_display *dri2_dpy = data;
1846
1847    if (strcmp(interface, "wl_shm") == 0) {
1848       dri2_dpy->wl_shm =
1849          wl_registry_bind(registry, name, &wl_shm_interface, 1);
1850       wl_shm_add_listener(dri2_dpy->wl_shm, &shm_listener, dri2_dpy);
1851    }
1852 }
1853
1854 static const struct wl_registry_listener registry_listener_swrast = {
1855    .global = registry_handle_global_swrast,
1856    .global_remove = registry_handle_global_remove
1857 };
1858
1859 static const struct dri2_egl_display_vtbl dri2_wl_swrast_display_vtbl = {
1860    .authenticate = NULL,
1861    .create_window_surface = dri2_wl_create_window_surface,
1862    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1863    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1864    .destroy_surface = dri2_wl_destroy_surface,
1865    .create_image = dri2_create_image_khr,
1866    .swap_buffers = dri2_wl_swrast_swap_buffers,
1867    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1868    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1869    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1870    .copy_buffers = dri2_fallback_copy_buffers,
1871    .query_buffer_age = dri2_fallback_query_buffer_age,
1872    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1873    .get_sync_values = dri2_fallback_get_sync_values,
1874    .get_dri_drawable = dri2_surface_get_dri_drawable,
1875 };
1876
1877 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1878    .base = { __DRI_SWRAST_LOADER, 2 },
1879
1880    .getDrawableInfo = dri2_wl_swrast_get_drawable_info,
1881    .putImage        = dri2_wl_swrast_put_image,
1882    .getImage        = dri2_wl_swrast_get_image,
1883    .putImage2       = dri2_wl_swrast_put_image2,
1884 };
1885
1886 static const __DRIextension *swrast_loader_extensions[] = {
1887    &swrast_loader_extension.base,
1888    &image_lookup_extension.base,
1889    NULL,
1890 };
1891
1892 static EGLBoolean
1893 dri2_initialize_wayland_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1894 {
1895    struct dri2_egl_display *dri2_dpy;
1896
1897    loader_set_logger(_eglLog);
1898
1899    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1900    if (!dri2_dpy)
1901       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1902
1903    dri2_dpy->fd = -1;
1904    disp->DriverData = (void *) dri2_dpy;
1905    if (disp->PlatformDisplay == NULL) {
1906       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1907       if (dri2_dpy->wl_dpy == NULL)
1908          goto cleanup;
1909       dri2_dpy->own_device = true;
1910    } else {
1911       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1912    }
1913
1914    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1915
1916    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1917    if (dri2_dpy->wl_dpy_wrapper == NULL)
1918       goto cleanup;
1919
1920    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1921                       dri2_dpy->wl_queue);
1922
1923    if (dri2_dpy->own_device)
1924       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1925
1926    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1927    wl_registry_add_listener(dri2_dpy->wl_registry,
1928                             &registry_listener_swrast, dri2_dpy);
1929
1930    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_shm == NULL)
1931       goto cleanup;
1932
1933    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->formats == 0)
1934       goto cleanup;
1935
1936    dri2_dpy->driver_name = strdup("swrast");
1937    if (!dri2_load_driver_swrast(disp))
1938       goto cleanup;
1939
1940    dri2_dpy->loader_extensions = swrast_loader_extensions;
1941
1942    if (!dri2_create_screen(disp))
1943       goto cleanup;
1944
1945    if (!dri2_setup_extensions(disp))
1946       goto cleanup;
1947
1948    dri2_setup_screen(disp);
1949
1950    dri2_wl_setup_swap_interval(disp);
1951
1952    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1953       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1954       goto cleanup;
1955    }
1956
1957    /* Fill vtbl last to prevent accidentally calling virtual function during
1958     * initialization.
1959     */
1960    dri2_dpy->vtbl = &dri2_wl_swrast_display_vtbl;
1961
1962    return EGL_TRUE;
1963
1964  cleanup:
1965    dri2_display_destroy(disp);
1966    return EGL_FALSE;
1967 }
1968
1969 EGLBoolean
1970 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
1971 {
1972    EGLBoolean initialized = EGL_FALSE;
1973
1974    if (!disp->Options.UseFallback)
1975       initialized = dri2_initialize_wayland_drm(drv, disp);
1976
1977    if (!initialized)
1978       initialized = dri2_initialize_wayland_swrast(drv, disp);
1979
1980    return initialized;
1981
1982 }