src/egl/drivers/dri2/platform_wayland.c

   1 /*
   2  * Copyright © 2011-2012 Intel Corporation
   3  * Copyright © 2012 Collabora, Ltd.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  20  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Kristian Høgsberg <krh@bitplanet.net>
  27  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  28  */
  29
  30 #include <stdint.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <xf86drm.h>
  39 #include <drm_fourcc.h>
  40 #include <sys/mman.h>
  41
  42 #include "egl_dri2.h"
  43 #include "egl_dri2_fallbacks.h"
  44 #include "loader.h"
  45 #include "util/debug.h"
  46 #include "util/u_vector.h"
  47 #include "eglglobals.h"
  48
  49 #include <wayland-client.h>
  50 #include "wayland-drm-client-protocol.h"
  51 #include "linux-dmabuf-unstable-v1-client-protocol.h"
  52
  53 #ifndef DRM_FORMAT_MOD_INVALID
  54 #define DRM_FORMAT_MOD_INVALID ((1ULL << 56) - 1)
  55 #endif
  56
  57 #ifndef DRM_FORMAT_MOD_LINEAR
  58 #define DRM_FORMAT_MOD_LINEAR 0
  59 #endif
  60
  61 enum wl_drm_format_flags {
  62    HAS_ARGB8888 = 1,
  63    HAS_XRGB8888 = 2,
  64    HAS_RGB565 = 4,
  65 };
  66
  67 static int
  68 roundtrip(struct dri2_egl_display *dri2_dpy)
  69 {
  70    return wl_display_roundtrip_queue(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
  71 }
  72
  73 static void
  74 wl_buffer_release(void *data, struct wl_buffer *buffer)
  75 {
  76    struct dri2_egl_surface *dri2_surf = data;
  77    int i;
  78
  79    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); ++i)
  80       if (dri2_surf->color_buffers[i].wl_buffer == buffer)
  81          break;
  82
  83    if (i == ARRAY_SIZE(dri2_surf->color_buffers)) {
  84       wl_buffer_destroy(buffer);
  85       return;
  86    }
  87
  88    dri2_surf->color_buffers[i].locked = false;
  89 }
  90
  91 static const struct wl_buffer_listener wl_buffer_listener = {
  92    .release = wl_buffer_release
  93 };
  94
  95 static void
  96 resize_callback(struct wl_egl_window *wl_win, void *data)
  97 {
  98    struct dri2_egl_surface *dri2_surf = data;
  99    struct dri2_egl_display *dri2_dpy =
 100       dri2_egl_display(dri2_surf->base.Resource.Display);
 101
 102    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 103 }
 104
 105 static void
 106 destroy_window_callback(void *data)
 107 {
 108    struct dri2_egl_surface *dri2_surf = data;
 109    dri2_surf->wl_win = NULL;
 110 }
 111
 112 static struct wl_surface *
 113 get_wl_surface_proxy(struct wl_egl_window *window)
 114 {
 115     /* Version 3 of wl_egl_window introduced a version field at the same
 116      * location where a pointer to wl_surface was stored. Thus, if
 117      * window->version is dereferencable, we've been given an older version of
 118      * wl_egl_window, and window->version points to wl_surface */
 119    if (_eglPointerIsDereferencable((void *)(window->version))) {
 120       return wl_proxy_create_wrapper((void *)(window->version));
 121    }
 122    return wl_proxy_create_wrapper(window->surface);
 123 }
 124
 125 /**
 126  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 127  */
 128 static _EGLSurface *
 129 dri2_wl_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 130                               _EGLConfig *conf, void *native_window,
 131                               const EGLint *attrib_list)
 132 {
 133    __DRIcreateNewDrawableFunc createNewDrawable;
 134    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 135    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 136    struct wl_egl_window *window = native_window;
 137    struct dri2_egl_surface *dri2_surf;
 138    const __DRIconfig *config;
 139
 140    dri2_surf = calloc(1, sizeof *dri2_surf);
 141    if (!dri2_surf) {
 142       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 143       return NULL;
 144    }
 145
 146    if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list, false))
 147       goto cleanup_surf;
 148
 149    if (dri2_dpy->wl_dmabuf || dri2_dpy->wl_drm) {
 150       if (conf->RedSize == 5)
 151          dri2_surf->format = WL_DRM_FORMAT_RGB565;
 152       else if (conf->AlphaSize == 0)
 153          dri2_surf->format = WL_DRM_FORMAT_XRGB8888;
 154       else
 155          dri2_surf->format = WL_DRM_FORMAT_ARGB8888;
 156    } else {
 157       assert(dri2_dpy->wl_shm);
 158       if (conf->RedSize == 5)
 159          dri2_surf->format = WL_SHM_FORMAT_RGB565;
 160       else if (conf->AlphaSize == 0)
 161          dri2_surf->format = WL_SHM_FORMAT_XRGB8888;
 162       else
 163          dri2_surf->format = WL_SHM_FORMAT_ARGB8888;
 164    }
 165
 166    dri2_surf->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
 167    if (!dri2_surf->wl_queue) {
 168       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 169       goto cleanup_surf;
 170    }
 171
 172    if (dri2_dpy->wl_drm) {
 173       dri2_surf->wl_drm_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_drm);
 174       if (!dri2_surf->wl_drm_wrapper) {
 175          _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 176          goto cleanup_queue;
 177       }
 178       wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_drm_wrapper,
 179                          dri2_surf->wl_queue);
 180    }
 181
 182    dri2_surf->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
 183    if (!dri2_surf->wl_dpy_wrapper) {
 184       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 185       goto cleanup_drm;
 186    }
 187    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_dpy_wrapper,
 188                       dri2_surf->wl_queue);
 189
 190    dri2_surf->wl_surface_wrapper = get_wl_surface_proxy(window);
 191    if (!dri2_surf->wl_surface_wrapper) {
 192       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 193       goto cleanup_dpy_wrapper;
 194    }
 195    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_surface_wrapper,
 196                       dri2_surf->wl_queue);
 197
 198    dri2_surf->wl_win = window;
 199    dri2_surf->wl_win->private = dri2_surf;
 200    dri2_surf->wl_win->destroy_window_callback = destroy_window_callback;
 201    if (dri2_dpy->flush)
 202       dri2_surf->wl_win->resize_callback = resize_callback;
 203
 204    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 205                                 dri2_surf->base.GLColorspace);
 206
 207    if (dri2_dpy->image_driver)
 208       createNewDrawable = dri2_dpy->image_driver->createNewDrawable;
 209    else if (dri2_dpy->dri2)
 210       createNewDrawable = dri2_dpy->dri2->createNewDrawable;
 211    else
 212       createNewDrawable = dri2_dpy->swrast->createNewDrawable;
 213
 214    dri2_surf->dri_drawable = (*createNewDrawable)(dri2_dpy->dri_screen, config,
 215                                                   dri2_surf);
 216     if (dri2_surf->dri_drawable == NULL) {
 217       _eglError(EGL_BAD_ALLOC, "createNewDrawable");
 218        goto cleanup_surf_wrapper;
 219     }
 220
 221    dri2_surf->base.SwapInterval = dri2_dpy->default_swap_interval;
 222
 223    return &dri2_surf->base;
 224
 225  cleanup_surf_wrapper:
 226    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 227  cleanup_dpy_wrapper:
 228    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 229  cleanup_drm:
 230    if (dri2_surf->wl_drm_wrapper)
 231       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 232  cleanup_queue:
 233    wl_event_queue_destroy(dri2_surf->wl_queue);
 234  cleanup_surf:
 235    free(dri2_surf);
 236
 237    return NULL;
 238 }
 239
 240 static _EGLSurface *
 241 dri2_wl_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 242                               _EGLConfig *conf, void *native_window,
 243                               const EGLint *attrib_list)
 244 {
 245    /* From the EGL_EXT_platform_wayland spec, version 3:
 246     *
 247     *   It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 248     *   that belongs to Wayland. Any such call fails and generates
 249     *   EGL_BAD_PARAMETER.
 250     */
 251    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on "
 252              "Wayland");
 253    return NULL;
 254 }
 255
 256 /**
 257  * Called via eglDestroySurface(), drv->API.DestroySurface().
 258  */
 259 static EGLBoolean
 260 dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 261 {
 262    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 263    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 264
 265    (void) drv;
 266
 267    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 268
 269    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 270       if (dri2_surf->color_buffers[i].wl_buffer)
 271          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 272       if (dri2_surf->color_buffers[i].dri_image)
 273          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 274       if (dri2_surf->color_buffers[i].linear_copy)
 275          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 276       if (dri2_surf->color_buffers[i].data)
 277          munmap(dri2_surf->color_buffers[i].data,
 278                 dri2_surf->color_buffers[i].data_size);
 279    }
 280
 281    if (dri2_dpy->dri2)
 282       dri2_egl_surface_free_local_buffers(dri2_surf);
 283
 284    if (dri2_surf->throttle_callback)
 285       wl_callback_destroy(dri2_surf->throttle_callback);
 286
 287    if (dri2_surf->wl_win) {
 288       dri2_surf->wl_win->private = NULL;
 289       dri2_surf->wl_win->resize_callback = NULL;
 290       dri2_surf->wl_win->destroy_window_callback = NULL;
 291    }
 292
 293    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 294    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 295    if (dri2_surf->wl_drm_wrapper)
 296       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 297    wl_event_queue_destroy(dri2_surf->wl_queue);
 298
 299    dri2_fini_surface(surf);
 300    free(surf);
 301
 302    return EGL_TRUE;
 303 }
 304
 305 static void
 306 dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
 307 {
 308    struct dri2_egl_display *dri2_dpy =
 309       dri2_egl_display(dri2_surf->base.Resource.Display);
 310
 311    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 312       if (dri2_surf->color_buffers[i].wl_buffer &&
 313           !dri2_surf->color_buffers[i].locked)
 314          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 315       if (dri2_surf->color_buffers[i].dri_image)
 316          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 317       if (dri2_surf->color_buffers[i].linear_copy)
 318          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 319       if (dri2_surf->color_buffers[i].data)
 320          munmap(dri2_surf->color_buffers[i].data,
 321                 dri2_surf->color_buffers[i].data_size);
 322
 323       dri2_surf->color_buffers[i].wl_buffer = NULL;
 324       dri2_surf->color_buffers[i].dri_image = NULL;
 325       dri2_surf->color_buffers[i].linear_copy = NULL;
 326       dri2_surf->color_buffers[i].data = NULL;
 327       dri2_surf->color_buffers[i].locked = false;
 328    }
 329
 330    if (dri2_dpy->dri2)
 331       dri2_egl_surface_free_local_buffers(dri2_surf);
 332 }
 333
 334 static int
 335 get_back_bo(struct dri2_egl_surface *dri2_surf)
 336 {
 337    struct dri2_egl_display *dri2_dpy =
 338       dri2_egl_display(dri2_surf->base.Resource.Display);
 339    int use_flags;
 340    unsigned int dri_image_format;
 341    uint64_t *modifiers;
 342    int num_modifiers;
 343
 344    /* currently supports three WL DRM formats,
 345     * WL_DRM_FORMAT_ARGB8888, WL_DRM_FORMAT_XRGB8888,
 346     * and WL_DRM_FORMAT_RGB565
 347     */
 348    switch (dri2_surf->format) {
 349    case WL_DRM_FORMAT_ARGB8888:
 350       dri_image_format = __DRI_IMAGE_FORMAT_ARGB8888;
 351       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.argb8888);
 352       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.argb8888);
 353       break;
 354    case WL_DRM_FORMAT_XRGB8888:
 355       dri_image_format = __DRI_IMAGE_FORMAT_XRGB8888;
 356       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.xrgb8888);
 357       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.xrgb8888);
 358       break;
 359    case WL_DRM_FORMAT_RGB565:
 360       dri_image_format = __DRI_IMAGE_FORMAT_RGB565;
 361       modifiers = u_vector_tail(&dri2_dpy->wl_modifiers.rgb565);
 362       num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers.rgb565);
 363       break;
 364    default:
 365       /* format is not supported */
 366       return -1;
 367    }
 368
 369    /* There might be a buffer release already queued that wasn't processed */
 370    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
 371
 372    while (dri2_surf->back == NULL) {
 373       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 374          /* Get an unlocked buffer, preferrably one with a dri_buffer
 375           * already allocated. */
 376          if (dri2_surf->color_buffers[i].locked)
 377             continue;
 378          if (dri2_surf->back == NULL)
 379             dri2_surf->back = &dri2_surf->color_buffers[i];
 380          else if (dri2_surf->back->dri_image == NULL)
 381             dri2_surf->back = &dri2_surf->color_buffers[i];
 382       }
 383
 384       if (dri2_surf->back)
 385          break;
 386
 387       /* If we don't have a buffer, then block on the server to release one for
 388        * us, and try again. wl_display_dispatch_queue will process any pending
 389        * events, however not all servers flush on issuing a buffer release
 390        * event. So, we spam the server with roundtrips as they always cause a
 391        * client flush.
 392        */
 393       if (wl_display_roundtrip_queue(dri2_dpy->wl_dpy,
 394                                      dri2_surf->wl_queue) < 0)
 395           return -1;
 396    }
 397
 398    if (dri2_surf->back == NULL)
 399       return -1;
 400
 401    use_flags = __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_BACKBUFFER;
 402
 403    if (dri2_dpy->is_different_gpu &&
 404        dri2_surf->back->linear_copy == NULL) {
 405       /* The LINEAR modifier should be a perfect alias of the LINEAR use
 406        * flag; try the new interface first before the old, then fall back. */
 407       if (dri2_dpy->image->base.version >= 15 &&
 408            dri2_dpy->image->createImageWithModifiers) {
 409          uint64_t linear_mod = DRM_FORMAT_MOD_LINEAR;
 410
 411          dri2_surf->back->linear_copy =
 412             dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 413                                                       dri2_surf->base.Width,
 414                                                       dri2_surf->base.Height,
 415                                                       dri_image_format,
 416                                                       &linear_mod,
 417                                                       1,
 418                                                       NULL);
 419       } else {
 420          dri2_surf->back->linear_copy =
 421             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 422                                          dri2_surf->base.Width,
 423                                          dri2_surf->base.Height,
 424                                          dri_image_format,
 425                                          use_flags |
 426                                          __DRI_IMAGE_USE_LINEAR,
 427                                          NULL);
 428       }
 429       if (dri2_surf->back->linear_copy == NULL)
 430           return -1;
 431    }
 432
 433    if (dri2_surf->back->dri_image == NULL) {
 434       /* If our DRIImage implementation does not support
 435        * createImageWithModifiers, then fall back to the old createImage,
 436        * and hope it allocates an image which is acceptable to the winsys.
 437         */
 438       if (num_modifiers && dri2_dpy->image->base.version >= 15 &&
 439           dri2_dpy->image->createImageWithModifiers) {
 440          dri2_surf->back->dri_image =
 441            dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 442                                                      dri2_surf->base.Width,
 443                                                      dri2_surf->base.Height,
 444                                                      dri_image_format,
 445                                                      modifiers,
 446                                                      num_modifiers,
 447                                                      NULL);
 448       } else {
 449          dri2_surf->back->dri_image =
 450             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 451                                          dri2_surf->base.Width,
 452                                          dri2_surf->base.Height,
 453                                          dri_image_format,
 454                                          dri2_dpy->is_different_gpu ?
 455                                               0 : use_flags,
 456                                          NULL);
 457       }
 458
 459       dri2_surf->back->age = 0;
 460    }
 461    if (dri2_surf->back->dri_image == NULL)
 462       return -1;
 463
 464    dri2_surf->back->locked = true;
 465
 466    return 0;
 467 }
 468
 469
 470 static void
 471 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 472 {
 473    struct dri2_egl_display *dri2_dpy =
 474       dri2_egl_display(dri2_surf->base.Resource.Display);
 475    __DRIimage *image;
 476    int name, pitch;
 477
 478    image = dri2_surf->back->dri_image;
 479
 480    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 481    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 482
 483    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 484    buffer->name = name;
 485    buffer->pitch = pitch;
 486    buffer->cpp = 4;
 487    buffer->flags = 0;
 488 }
 489
 490 static int
 491 update_buffers(struct dri2_egl_surface *dri2_surf)
 492 {
 493    struct dri2_egl_display *dri2_dpy =
 494       dri2_egl_display(dri2_surf->base.Resource.Display);
 495
 496    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
 497        dri2_surf->base.Height != dri2_surf->wl_win->height) {
 498
 499       dri2_wl_release_buffers(dri2_surf);
 500
 501       dri2_surf->base.Width  = dri2_surf->wl_win->width;
 502       dri2_surf->base.Height = dri2_surf->wl_win->height;
 503       dri2_surf->dx = dri2_surf->wl_win->dx;
 504       dri2_surf->dy = dri2_surf->wl_win->dy;
 505    }
 506
 507    if (get_back_bo(dri2_surf) < 0) {
 508       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 509       return -1;
 510    }
 511
 512    /* If we have an extra unlocked buffer at this point, we had to do triple
 513     * buffering for a while, but now can go back to just double buffering.
 514     * That means we can free any unlocked buffer now. */
 515    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 516       if (!dri2_surf->color_buffers[i].locked &&
 517           dri2_surf->color_buffers[i].wl_buffer) {
 518          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 519          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 520          if (dri2_dpy->is_different_gpu)
 521             dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 522          dri2_surf->color_buffers[i].wl_buffer = NULL;
 523          dri2_surf->color_buffers[i].dri_image = NULL;
 524          dri2_surf->color_buffers[i].linear_copy = NULL;
 525       }
 526    }
 527
 528    return 0;
 529 }
 530
 531 static __DRIbuffer *
 532 dri2_wl_get_buffers_with_format(__DRIdrawable * driDrawable,
 533                                 int *width, int *height,
 534                                 unsigned int *attachments, int count,
 535                                 int *out_count, void *loaderPrivate)
 536 {
 537    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 538    int i, j;
 539
 540    if (update_buffers(dri2_surf) < 0)
 541       return NULL;
 542
 543    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 544       __DRIbuffer *local;
 545
 546       switch (attachments[i]) {
 547       case __DRI_BUFFER_BACK_LEFT:
 548          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 549          break;
 550       default:
 551          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 552                                                      attachments[i + 1]);
 553
 554          if (!local) {
 555             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 556             return NULL;
 557          }
 558          dri2_surf->buffers[j] = *local;
 559          break;
 560       }
 561    }
 562
 563    *out_count = j;
 564    if (j == 0)
 565       return NULL;
 566
 567    *width = dri2_surf->base.Width;
 568    *height = dri2_surf->base.Height;
 569
 570    return dri2_surf->buffers;
 571 }
 572
 573 static __DRIbuffer *
 574 dri2_wl_get_buffers(__DRIdrawable * driDrawable,
 575                     int *width, int *height,
 576                     unsigned int *attachments, int count,
 577                     int *out_count, void *loaderPrivate)
 578 {
 579    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 580    unsigned int *attachments_with_format;
 581    __DRIbuffer *buffer;
 582    unsigned int bpp;
 583
 584    switch (dri2_surf->format) {
 585    case WL_DRM_FORMAT_ARGB8888:
 586    case WL_DRM_FORMAT_XRGB8888:
 587       bpp = 32;
 588       break;
 589    case WL_DRM_FORMAT_RGB565:
 590       bpp = 16;
 591       break;
 592    default:
 593       /* format is not supported */
 594       return NULL;
 595    }
 596
 597    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 598    if (!attachments_with_format) {
 599       *out_count = 0;
 600       return NULL;
 601    }
 602
 603    for (int i = 0; i < count; ++i) {
 604       attachments_with_format[2*i] = attachments[i];
 605       attachments_with_format[2*i + 1] = bpp;
 606    }
 607
 608    buffer =
 609       dri2_wl_get_buffers_with_format(driDrawable,
 610                                       width, height,
 611                                       attachments_with_format, count,
 612                                       out_count, loaderPrivate);
 613
 614    free(attachments_with_format);
 615
 616    return buffer;
 617 }
 618
 619 static int
 620 image_get_buffers(__DRIdrawable *driDrawable,
 621                   unsigned int format,
 622                   uint32_t *stamp,
 623                   void *loaderPrivate,
 624                   uint32_t buffer_mask,
 625                   struct __DRIimageList *buffers)
 626 {
 627    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 628
 629    if (update_buffers(dri2_surf) < 0)
 630       return 0;
 631
 632    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 633    buffers->back = dri2_surf->back->dri_image;
 634
 635    return 1;
 636 }
 637
 638 static void
 639 dri2_wl_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 640 {
 641    (void) driDrawable;
 642    (void) loaderPrivate;
 643 }
 644
 645 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 646    .base = { __DRI_DRI2_LOADER, 3 },
 647
 648    .getBuffers           = dri2_wl_get_buffers,
 649    .flushFrontBuffer     = dri2_wl_flush_front_buffer,
 650    .getBuffersWithFormat = dri2_wl_get_buffers_with_format,
 651 };
 652
 653 static const __DRIimageLoaderExtension image_loader_extension = {
 654    .base = { __DRI_IMAGE_LOADER, 1 },
 655
 656    .getBuffers          = image_get_buffers,
 657    .flushFrontBuffer    = dri2_wl_flush_front_buffer,
 658 };
 659
 660 static void
 661 wayland_throttle_callback(void *data,
 662                           struct wl_callback *callback,
 663                           uint32_t time)
 664 {
 665    struct dri2_egl_surface *dri2_surf = data;
 666
 667    dri2_surf->throttle_callback = NULL;
 668    wl_callback_destroy(callback);
 669 }
 670
 671 static const struct wl_callback_listener throttle_listener = {
 672    .done = wayland_throttle_callback
 673 };
 674
 675 static struct wl_buffer *
 676 create_wl_buffer(struct dri2_egl_display *dri2_dpy,
 677                  struct dri2_egl_surface *dri2_surf,
 678                  __DRIimage *image)
 679 {
 680    struct wl_buffer *ret;
 681    int width, height, fourcc, num_planes;
 682
 683    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_WIDTH, &width);
 684    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_HEIGHT, &height);
 685    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FOURCC, &fourcc);
 686    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NUM_PLANES,
 687                                &num_planes);
 688
 689    if (dri2_dpy->wl_dmabuf && dri2_dpy->image->base.version >= 15) {
 690       struct zwp_linux_buffer_params_v1 *params;
 691       int mod_hi, mod_lo;
 692       int i;
 693
 694       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_MODIFIER_UPPER,
 695                                   &mod_hi);
 696       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_MODIFIER_LOWER,
 697                                   &mod_lo);
 698
 699       /* We don't need a wrapper for wl_dmabuf objects, because we have to
 700        * create the intermediate params object; we can set the queue on this,
 701        * and the wl_buffer inherits it race-free. */
 702       params = zwp_linux_dmabuf_v1_create_params(dri2_dpy->wl_dmabuf);
 703       if (dri2_surf)
 704          wl_proxy_set_queue((struct wl_proxy *) params, dri2_surf->wl_queue);
 705
 706       for (i = 0; i < num_planes; i++) {
 707          __DRIimage *p_image;
 708          int stride, offset, fd;
 709
 710          if (i == 0)
 711             p_image = image;
 712          else
 713             p_image = dri2_dpy->image->fromPlanar(image, i, NULL);
 714          if (!p_image) {
 715             zwp_linux_buffer_params_v1_destroy(params);
 716             return NULL;
 717          }
 718
 719          dri2_dpy->image->queryImage(p_image, __DRI_IMAGE_ATTRIB_FD, &fd);
 720          dri2_dpy->image->queryImage(p_image, __DRI_IMAGE_ATTRIB_STRIDE,
 721                                      &stride);
 722          dri2_dpy->image->queryImage(p_image, __DRI_IMAGE_ATTRIB_OFFSET,
 723                                      &offset);
 724          if (image != p_image)
 725             dri2_dpy->image->destroyImage(p_image);
 726
 727          zwp_linux_buffer_params_v1_add(params, fd, i, offset, stride,
 728                                         mod_hi, mod_lo);
 729          close(fd);
 730       }
 731
 732       ret = zwp_linux_buffer_params_v1_create_immed(params, width, height,
 733                                                     fourcc, 0);
 734       zwp_linux_buffer_params_v1_destroy(params);
 735    } else if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 736       struct wl_drm *wl_drm =
 737          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 738       int fd, stride;
 739
 740       if (num_planes > 1)
 741          return NULL;
 742
 743       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 744       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 745       ret = wl_drm_create_prime_buffer(wl_drm, fd, width, height, fourcc, 0,
 746                                        stride, 0, 0, 0, 0);
 747       close(fd);
 748    } else {
 749       struct wl_drm *wl_drm =
 750          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 751       int name, stride;
 752
 753       if (num_planes > 1)
 754          return NULL;
 755
 756       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 757       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 758       ret = wl_drm_create_buffer(wl_drm, name, width, height, stride, fourcc);
 759    }
 760
 761    return ret;
 762 }
 763
 764 static EGLBoolean
 765 try_damage_buffer(struct dri2_egl_surface *dri2_surf,
 766                   const EGLint *rects,
 767                   EGLint n_rects)
 768 {
 769    if (wl_proxy_get_version((struct wl_proxy *) dri2_surf->wl_surface_wrapper)
 770        < WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION)
 771       return EGL_FALSE;
 772
 773    for (int i = 0; i < n_rects; i++) {
 774       const int *rect = &rects[i * 4];
 775
 776       wl_surface_damage_buffer(dri2_surf->wl_surface_wrapper,
 777                                rect[0],
 778                                dri2_surf->base.Height - rect[1] - rect[3],
 779                                rect[2], rect[3]);
 780    }
 781    return EGL_TRUE;
 782 }
 783 /**
 784  * Called via eglSwapBuffers(), drv->API.SwapBuffers().
 785  */
 786 static EGLBoolean
 787 dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
 788                                  _EGLDisplay *disp,
 789                                  _EGLSurface *draw,
 790                                  const EGLint *rects,
 791                                  EGLint n_rects)
 792 {
 793    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 794    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 795
 796    while (dri2_surf->throttle_callback != NULL)
 797       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
 798                                     dri2_surf->wl_queue) == -1)
 799          return -1;
 800
 801    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 802       if (dri2_surf->color_buffers[i].age > 0)
 803          dri2_surf->color_buffers[i].age++;
 804
 805    /* Make sure we have a back buffer in case we're swapping without ever
 806     * rendering. */
 807    if (get_back_bo(dri2_surf) < 0)
 808       return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 809
 810    if (draw->SwapInterval > 0) {
 811       dri2_surf->throttle_callback =
 812          wl_surface_frame(dri2_surf->wl_surface_wrapper);
 813       wl_callback_add_listener(dri2_surf->throttle_callback,
 814                                &throttle_listener, dri2_surf);
 815    }
 816
 817    dri2_surf->back->age = 1;
 818    dri2_surf->current = dri2_surf->back;
 819    dri2_surf->back = NULL;
 820
 821    if (!dri2_surf->current->wl_buffer) {
 822       __DRIimage *image;
 823
 824       if (dri2_dpy->is_different_gpu)
 825          image = dri2_surf->current->linear_copy;
 826       else
 827          image = dri2_surf->current->dri_image;
 828
 829       dri2_surf->current->wl_buffer =
 830          create_wl_buffer(dri2_dpy, dri2_surf, image);
 831
 832       wl_buffer_add_listener(dri2_surf->current->wl_buffer,
 833                              &wl_buffer_listener, dri2_surf);
 834    }
 835
 836    wl_surface_attach(dri2_surf->wl_surface_wrapper,
 837                      dri2_surf->current->wl_buffer,
 838                      dri2_surf->dx, dri2_surf->dy);
 839
 840    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
 841    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
 842    /* reset resize growing parameters */
 843    dri2_surf->dx = 0;
 844    dri2_surf->dy = 0;
 845
 846    /* If the compositor doesn't support damage_buffer, we deliberately
 847     * ignore the damage region and post maximum damage, due to
 848     * https://bugs.freedesktop.org/78190 */
 849    if (!n_rects || !try_damage_buffer(dri2_surf, rects, n_rects))
 850       wl_surface_damage(dri2_surf->wl_surface_wrapper,
 851                         0, 0, INT32_MAX, INT32_MAX);
 852
 853    if (dri2_dpy->is_different_gpu) {
 854       _EGLContext *ctx = _eglGetCurrentContext();
 855       struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
 856       dri2_dpy->image->blitImage(dri2_ctx->dri_context,
 857                                  dri2_surf->current->linear_copy,
 858                                  dri2_surf->current->dri_image,
 859                                  0, 0, dri2_surf->base.Width,
 860                                  dri2_surf->base.Height,
 861                                  0, 0, dri2_surf->base.Width,
 862                                  dri2_surf->base.Height, 0);
 863    }
 864
 865    dri2_flush_drawable_for_swapbuffers(disp, draw);
 866    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 867
 868    wl_surface_commit(dri2_surf->wl_surface_wrapper);
 869
 870    /* If we're not waiting for a frame callback then we'll at least throttle
 871     * to a sync callback so that we always give a chance for the compositor to
 872     * handle the commit and send a release event before checking for a free
 873     * buffer */
 874    if (dri2_surf->throttle_callback == NULL) {
 875       dri2_surf->throttle_callback = wl_display_sync(dri2_surf->wl_dpy_wrapper);
 876       wl_callback_add_listener(dri2_surf->throttle_callback,
 877                                &throttle_listener, dri2_surf);
 878    }
 879
 880    wl_display_flush(dri2_dpy->wl_dpy);
 881
 882    return EGL_TRUE;
 883 }
 884
 885 static EGLint
 886 dri2_wl_query_buffer_age(_EGLDriver *drv,
 887                          _EGLDisplay *disp, _EGLSurface *surface)
 888 {
 889    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 890
 891    if (get_back_bo(dri2_surf) < 0) {
 892       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 893       return -1;
 894    }
 895
 896    return dri2_surf->back->age;
 897 }
 898
 899 static EGLBoolean
 900 dri2_wl_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 901 {
 902    return dri2_wl_swap_buffers_with_damage(drv, disp, draw, NULL, 0);
 903 }
 904
 905 static struct wl_buffer *
 906 dri2_wl_create_wayland_buffer_from_image(_EGLDriver *drv,
 907                                           _EGLDisplay *disp,
 908                                           _EGLImage *img)
 909 {
 910    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 911    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
 912    __DRIimage *image = dri2_img->dri_image;
 913    struct wl_buffer *buffer;
 914    int format;
 915
 916    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &format);
 917    switch (format) {
 918    case __DRI_IMAGE_FORMAT_ARGB8888:
 919       if (!(dri2_dpy->formats & HAS_ARGB8888))
 920          goto bad_format;
 921       break;
 922    case __DRI_IMAGE_FORMAT_XRGB8888:
 923       if (!(dri2_dpy->formats & HAS_XRGB8888))
 924          goto bad_format;
 925       break;
 926    default:
 927       goto bad_format;
 928    }
 929
 930    buffer = create_wl_buffer(dri2_dpy, NULL, image);
 931
 932    /* The buffer object will have been created with our internal event queue
 933     * because it is using wl_dmabuf/wl_drm as a proxy factory. We want the
 934     * buffer to be used by the application so we'll reset it to the display's
 935     * default event queue. This isn't actually racy, as the only event the
 936     * buffer can get is a buffer release, which doesn't happen with an explicit
 937     * attach. */
 938    if (buffer)
 939       wl_proxy_set_queue((struct wl_proxy *) buffer, NULL);
 940
 941    return buffer;
 942
 943 bad_format:
 944    _eglError(EGL_BAD_MATCH, "unsupported image format");
 945    return NULL;
 946 }
 947
 948 static int
 949 dri2_wl_authenticate(_EGLDisplay *disp, uint32_t id)
 950 {
 951    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 952    int ret = 0;
 953
 954    if (dri2_dpy->is_render_node) {
 955       _eglLog(_EGL_WARNING, "wayland-egl: client asks server to "
 956                             "authenticate for render-nodes");
 957       return 0;
 958    }
 959    dri2_dpy->authenticated = false;
 960
 961    wl_drm_authenticate(dri2_dpy->wl_drm, id);
 962    if (roundtrip(dri2_dpy) < 0)
 963       ret = -1;
 964
 965    if (!dri2_dpy->authenticated)
 966       ret = -1;
 967
 968    /* reset authenticated */
 969    dri2_dpy->authenticated = true;
 970
 971    return ret;
 972 }
 973
 974 static void
 975 drm_handle_device(void *data, struct wl_drm *drm, const char *device)
 976 {
 977    struct dri2_egl_display *dri2_dpy = data;
 978    drm_magic_t magic;
 979
 980    dri2_dpy->device_name = strdup(device);
 981    if (!dri2_dpy->device_name)
 982       return;
 983
 984    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 985    if (dri2_dpy->fd == -1) {
 986       _eglLog(_EGL_WARNING, "wayland-egl: could not open %s (%s)",
 987               dri2_dpy->device_name, strerror(errno));
 988       return;
 989    }
 990
 991    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
 992       dri2_dpy->authenticated = true;
 993    } else {
 994       drmGetMagic(dri2_dpy->fd, &magic);
 995       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
 996    }
 997 }
 998
 999 static void
1000 drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
1001 {
1002    struct dri2_egl_display *dri2_dpy = data;
1003
1004    switch (format) {
1005    case WL_DRM_FORMAT_ARGB8888:
1006       dri2_dpy->formats |= HAS_ARGB8888;
1007       break;
1008    case WL_DRM_FORMAT_XRGB8888:
1009       dri2_dpy->formats |= HAS_XRGB8888;
1010       break;
1011    case WL_DRM_FORMAT_RGB565:
1012       dri2_dpy->formats |= HAS_RGB565;
1013       break;
1014    }
1015 }
1016
1017 static void
1018 drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
1019 {
1020    struct dri2_egl_display *dri2_dpy = data;
1021
1022    dri2_dpy->capabilities = value;
1023 }
1024
1025 static void
1026 drm_handle_authenticated(void *data, struct wl_drm *drm)
1027 {
1028    struct dri2_egl_display *dri2_dpy = data;
1029
1030    dri2_dpy->authenticated = true;
1031 }
1032
1033 static const struct wl_drm_listener drm_listener = {
1034    .device = drm_handle_device,
1035    .format = drm_handle_format,
1036    .authenticated = drm_handle_authenticated,
1037    .capabilities = drm_handle_capabilities
1038 };
1039
1040 static void
1041 dmabuf_ignore_format(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1042                      uint32_t format)
1043 {
1044    /* formats are implicitly advertised by the 'modifier' event, so ignore */
1045 }
1046
1047 static void
1048 dmabuf_handle_modifier(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1049                        uint32_t format, uint32_t modifier_hi,
1050                        uint32_t modifier_lo)
1051 {
1052    struct dri2_egl_display *dri2_dpy = data;
1053    uint64_t *mod = NULL;
1054
1055    if (modifier_hi == (DRM_FORMAT_MOD_INVALID >> 32) &&
1056        modifier_lo == (DRM_FORMAT_MOD_INVALID & 0xffffffff))
1057       return;
1058
1059    switch (format) {
1060    case WL_DRM_FORMAT_ARGB8888:
1061       mod = u_vector_add(&dri2_dpy->wl_modifiers.argb8888);
1062       dri2_dpy->formats |= HAS_ARGB8888;
1063       break;
1064    case WL_DRM_FORMAT_XRGB8888:
1065       mod = u_vector_add(&dri2_dpy->wl_modifiers.xrgb8888);
1066       dri2_dpy->formats |= HAS_XRGB8888;
1067       break;
1068    case WL_DRM_FORMAT_RGB565:
1069       mod = u_vector_add(&dri2_dpy->wl_modifiers.rgb565);
1070       dri2_dpy->formats |= HAS_RGB565;
1071       break;
1072    default:
1073       break;
1074    }
1075
1076    if (!mod)
1077       return;
1078
1079    *mod = (uint64_t) modifier_hi << 32;
1080    *mod |= (uint64_t) (modifier_lo & 0xffffffff);
1081 }
1082
1083 static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
1084    .format = dmabuf_ignore_format,
1085    .modifier = dmabuf_handle_modifier,
1086 };
1087
1088 static void
1089 registry_handle_global_drm(void *data, struct wl_registry *registry,
1090                            uint32_t name, const char *interface,
1091                            uint32_t version)
1092 {
1093    struct dri2_egl_display *dri2_dpy = data;
1094
1095    if (strcmp(interface, "wl_drm") == 0) {
1096       dri2_dpy->wl_drm =
1097          wl_registry_bind(registry, name, &wl_drm_interface, MIN2(version, 2));
1098       wl_drm_add_listener(dri2_dpy->wl_drm, &drm_listener, dri2_dpy);
1099    } else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0 && version >= 3) {
1100       dri2_dpy->wl_dmabuf =
1101          wl_registry_bind(registry, name, &zwp_linux_dmabuf_v1_interface,
1102                           MIN2(version, 3));
1103       zwp_linux_dmabuf_v1_add_listener(dri2_dpy->wl_dmabuf, &dmabuf_listener,
1104                                        dri2_dpy);
1105    }
1106 }
1107
1108 static void
1109 registry_handle_global_remove(void *data, struct wl_registry *registry,
1110                               uint32_t name)
1111 {
1112 }
1113
1114 static const struct wl_registry_listener registry_listener_drm = {
1115    .global = registry_handle_global_drm,
1116    .global_remove = registry_handle_global_remove
1117 };
1118
1119 static void
1120 dri2_wl_setup_swap_interval(_EGLDisplay *disp)
1121 {
1122    /* We can't use values greater than 1 on Wayland because we are using the
1123     * frame callback to synchronise the frame and the only way we be sure to
1124     * get a frame callback is to attach a new buffer. Therefore we can't just
1125     * sit drawing nothing to wait until the next ‘n’ frame callbacks */
1126
1127    dri2_setup_swap_interval(disp, 1);
1128 }
1129
1130 static const struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
1131    .authenticate = dri2_wl_authenticate,
1132    .create_window_surface = dri2_wl_create_window_surface,
1133    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1134    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1135    .destroy_surface = dri2_wl_destroy_surface,
1136    .create_image = dri2_create_image_khr,
1137    .swap_buffers = dri2_wl_swap_buffers,
1138    .swap_buffers_with_damage = dri2_wl_swap_buffers_with_damage,
1139    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1140    .set_damage_region = dri2_fallback_set_damage_region,
1141    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1142    .copy_buffers = dri2_fallback_copy_buffers,
1143    .query_buffer_age = dri2_wl_query_buffer_age,
1144    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
1145    .get_sync_values = dri2_fallback_get_sync_values,
1146    .get_dri_drawable = dri2_surface_get_dri_drawable,
1147 };
1148
1149 static const __DRIextension *dri2_loader_extensions[] = {
1150    &dri2_loader_extension.base,
1151    &image_loader_extension.base,
1152    &image_lookup_extension.base,
1153    &use_invalidate.base,
1154    NULL,
1155 };
1156
1157 static const __DRIextension *image_loader_extensions[] = {
1158    &image_loader_extension.base,
1159    &image_lookup_extension.base,
1160    &use_invalidate.base,
1161    NULL,
1162 };
1163
1164 static EGLBoolean
1165 dri2_wl_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
1166 {
1167    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1168    static const struct {
1169       const char *format_name;
1170       int has_format;
1171       unsigned int rgba_masks[4];
1172    } visuals[] = {
1173       { "XRGB8888", HAS_XRGB8888, { 0xff0000, 0xff00, 0x00ff, 0xff000000 } },
1174       { "ARGB8888", HAS_ARGB8888, { 0xff0000, 0xff00, 0x00ff, 0 } },
1175       { "RGB565",   HAS_RGB565,   { 0x00f800, 0x07e0, 0x001f, 0 } },
1176    };
1177    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
1178    unsigned int count = 0;
1179
1180    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
1181       for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
1182          struct dri2_egl_config *dri2_conf;
1183
1184          if (!(dri2_dpy->formats & visuals[j].has_format))
1185             continue;
1186
1187          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1188                count + 1, EGL_WINDOW_BIT, NULL, visuals[j].rgba_masks);
1189          if (dri2_conf) {
1190             if (dri2_conf->base.ConfigID == count + 1)
1191                count++;
1192             format_count[j]++;
1193          }
1194       }
1195    }
1196
1197    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
1198       if (!format_count[i]) {
1199          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
1200                  visuals[i].format_name);
1201       }
1202    }
1203
1204    return (count != 0);
1205 }
1206
1207 static EGLBoolean
1208 dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
1209 {
1210    struct dri2_egl_display *dri2_dpy;
1211
1212    loader_set_logger(_eglLog);
1213
1214    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1215    if (!dri2_dpy)
1216       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1217
1218    dri2_dpy->fd = -1;
1219    disp->DriverData = (void *) dri2_dpy;
1220    if (disp->PlatformDisplay == NULL) {
1221       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1222       if (dri2_dpy->wl_dpy == NULL)
1223          goto cleanup;
1224       dri2_dpy->own_device = true;
1225    } else {
1226       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1227    }
1228
1229    if (!u_vector_init(&dri2_dpy->wl_modifiers.xrgb8888, sizeof(uint64_t), 32) ||
1230        !u_vector_init(&dri2_dpy->wl_modifiers.argb8888, sizeof(uint64_t), 32) ||
1231        !u_vector_init(&dri2_dpy->wl_modifiers.rgb565, sizeof(uint64_t), 32)) {
1232       goto cleanup;
1233    }
1234
1235    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1236
1237    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1238    if (dri2_dpy->wl_dpy_wrapper == NULL)
1239       goto cleanup;
1240
1241    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1242                       dri2_dpy->wl_queue);
1243
1244    if (dri2_dpy->own_device)
1245       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1246
1247    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1248    wl_registry_add_listener(dri2_dpy->wl_registry,
1249                             &registry_listener_drm, dri2_dpy);
1250    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_drm == NULL)
1251       goto cleanup;
1252
1253    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->fd == -1)
1254       goto cleanup;
1255
1256    if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
1257       goto cleanup;
1258
1259    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
1260                                                &dri2_dpy->is_different_gpu);
1261    if (dri2_dpy->is_different_gpu) {
1262       free(dri2_dpy->device_name);
1263       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
1264       if (!dri2_dpy->device_name) {
1265          _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
1266                                   "for requested GPU");
1267          goto cleanup;
1268       }
1269    }
1270
1271    /* we have to do the check now, because loader_get_user_preferred_fd
1272     * will return a render-node when the requested gpu is different
1273     * to the server, but also if the client asks for the same gpu than
1274     * the server by requesting its pci-id */
1275    dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
1276
1277    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
1278    if (dri2_dpy->driver_name == NULL) {
1279       _eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
1280       goto cleanup;
1281    }
1282
1283    /* render nodes cannot use Gem names, and thus do not support
1284     * the __DRI_DRI2_LOADER extension */
1285    if (!dri2_dpy->is_render_node) {
1286       dri2_dpy->loader_extensions = dri2_loader_extensions;
1287       if (!dri2_load_driver(disp)) {
1288          _eglError(EGL_BAD_ALLOC, "DRI2: failed to load driver");
1289          goto cleanup;
1290       }
1291    } else {
1292       dri2_dpy->loader_extensions = image_loader_extensions;
1293       if (!dri2_load_driver_dri3(disp)) {
1294          _eglError(EGL_BAD_ALLOC, "DRI3: failed to load driver");
1295          goto cleanup;
1296       }
1297    }
1298
1299    if (!dri2_create_screen(disp))
1300       goto cleanup;
1301
1302    if (!dri2_setup_extensions(disp))
1303       goto cleanup;
1304
1305    dri2_setup_screen(disp);
1306
1307    dri2_wl_setup_swap_interval(disp);
1308
1309    /* To use Prime, we must have _DRI_IMAGE v7 at least.
1310     * createImageFromFds support indicates that Prime export/import
1311     * is supported by the driver. Fall back to
1312     * gem names if we don't have Prime support. */
1313
1314    if (dri2_dpy->image->base.version < 7 ||
1315        dri2_dpy->image->createImageFromFds == NULL)
1316       dri2_dpy->capabilities &= ~WL_DRM_CAPABILITY_PRIME;
1317
1318    /* We cannot use Gem names with render-nodes, only prime fds (dma-buf).
1319     * The server needs to accept them */
1320    if (dri2_dpy->is_render_node &&
1321        !(dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME)) {
1322       _eglLog(_EGL_WARNING, "wayland-egl: display is not render-node capable");
1323       goto cleanup;
1324    }
1325
1326    if (dri2_dpy->is_different_gpu &&
1327        (dri2_dpy->image->base.version < 9 ||
1328         dri2_dpy->image->blitImage == NULL)) {
1329       _eglLog(_EGL_WARNING, "wayland-egl: Different GPU selected, but the "
1330                             "Image extension in the driver is not "
1331                             "compatible. Version 9 or later and blitImage() "
1332                             "are required");
1333       goto cleanup;
1334    }
1335
1336    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1337       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1338       goto cleanup;
1339    }
1340
1341    dri2_set_WL_bind_wayland_display(drv, disp);
1342    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
1343     * because the buffer of the EGLImage has likely a tiling mode the server
1344     * gpu won't support. These is no way to check for now. Thus do not support the
1345     * extension */
1346    if (!dri2_dpy->is_different_gpu)
1347       disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
1348
1349    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1350
1351    disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
1352
1353    /* Fill vtbl last to prevent accidentally calling virtual function during
1354     * initialization.
1355     */
1356    dri2_dpy->vtbl = &dri2_wl_display_vtbl;
1357
1358    return EGL_TRUE;
1359
1360  cleanup:
1361    dri2_display_destroy(disp);
1362    return EGL_FALSE;
1363 }
1364
1365 static int
1366 dri2_wl_swrast_get_stride_for_format(int format, int w)
1367 {
1368    if (format == WL_SHM_FORMAT_RGB565)
1369       return 2 * w;
1370    else /* ARGB8888 || XRGB8888 */
1371       return 4 * w;
1372 }
1373
1374 /*
1375  * Taken from weston shared/os-compatibility.c
1376  */
1377
1378 #ifndef HAVE_MKOSTEMP
1379
1380 static int
1381 set_cloexec_or_close(int fd)
1382 {
1383    long flags;
1384
1385    if (fd == -1)
1386       return -1;
1387
1388    flags = fcntl(fd, F_GETFD);
1389    if (flags == -1)
1390       goto err;
1391
1392    if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
1393       goto err;
1394
1395    return fd;
1396
1397 err:
1398    close(fd);
1399    return -1;
1400 }
1401
1402 #endif
1403
1404 /*
1405  * Taken from weston shared/os-compatibility.c
1406  */
1407
1408 static int
1409 create_tmpfile_cloexec(char *tmpname)
1410 {
1411    int fd;
1412
1413 #ifdef HAVE_MKOSTEMP
1414    fd = mkostemp(tmpname, O_CLOEXEC);
1415    if (fd >= 0)
1416       unlink(tmpname);
1417 #else
1418    fd = mkstemp(tmpname);
1419    if (fd >= 0) {
1420       fd = set_cloexec_or_close(fd);
1421       unlink(tmpname);
1422    }
1423 #endif
1424
1425    return fd;
1426 }
1427
1428 /*
1429  * Taken from weston shared/os-compatibility.c
1430  *
1431  * Create a new, unique, anonymous file of the given size, and
1432  * return the file descriptor for it. The file descriptor is set
1433  * CLOEXEC. The file is immediately suitable for mmap()'ing
1434  * the given size at offset zero.
1435  *
1436  * The file should not have a permanent backing store like a disk,
1437  * but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
1438  *
1439  * The file name is deleted from the file system.
1440  *
1441  * The file is suitable for buffer sharing between processes by
1442  * transmitting the file descriptor over Unix sockets using the
1443  * SCM_RIGHTS methods.
1444  *
1445  * If the C library implements posix_fallocate(), it is used to
1446  * guarantee that disk space is available for the file at the
1447  * given size. If disk space is insufficent, errno is set to ENOSPC.
1448  * If posix_fallocate() is not supported, program may receive
1449  * SIGBUS on accessing mmap()'ed file contents instead.
1450  */
1451 static int
1452 os_create_anonymous_file(off_t size)
1453 {
1454    static const char template[] = "/mesa-shared-XXXXXX";
1455    const char *path;
1456    char *name;
1457    int fd;
1458    int ret;
1459
1460    path = getenv("XDG_RUNTIME_DIR");
1461    if (!path) {
1462       errno = ENOENT;
1463       return -1;
1464    }
1465
1466    name = malloc(strlen(path) + sizeof(template));
1467    if (!name)
1468       return -1;
1469
1470    strcpy(name, path);
1471    strcat(name, template);
1472
1473    fd = create_tmpfile_cloexec(name);
1474
1475    free(name);
1476
1477    if (fd < 0)
1478       return -1;
1479
1480    ret = ftruncate(fd, size);
1481    if (ret < 0) {
1482       close(fd);
1483       return -1;
1484    }
1485
1486    return fd;
1487 }
1488
1489
1490 static EGLBoolean
1491 dri2_wl_swrast_allocate_buffer(struct dri2_egl_surface *dri2_surf,
1492                                int format, int w, int h,
1493                                void **data, int *size,
1494                                struct wl_buffer **buffer)
1495 {
1496    struct dri2_egl_display *dri2_dpy =
1497       dri2_egl_display(dri2_surf->base.Resource.Display);
1498    struct wl_shm_pool *pool;
1499    int fd, stride, size_map;
1500    void *data_map;
1501
1502    stride = dri2_wl_swrast_get_stride_for_format(format, w);
1503    size_map = h * stride;
1504
1505    /* Create a sharable buffer */
1506    fd = os_create_anonymous_file(size_map);
1507    if (fd < 0)
1508       return EGL_FALSE;
1509
1510    data_map = mmap(NULL, size_map, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1511    if (data_map == MAP_FAILED) {
1512       close(fd);
1513       return EGL_FALSE;
1514    }
1515
1516    /* Share it in a wl_buffer */
1517    pool = wl_shm_create_pool(dri2_dpy->wl_shm, fd, size_map);
1518    wl_proxy_set_queue((struct wl_proxy *)pool, dri2_surf->wl_queue);
1519    *buffer = wl_shm_pool_create_buffer(pool, 0, w, h, stride, format);
1520    wl_shm_pool_destroy(pool);
1521    close(fd);
1522
1523    *data = data_map;
1524    *size = size_map;
1525    return EGL_TRUE;
1526 }
1527
1528 static int
1529 swrast_update_buffers(struct dri2_egl_surface *dri2_surf)
1530 {
1531    struct dri2_egl_display *dri2_dpy =
1532       dri2_egl_display(dri2_surf->base.Resource.Display);
1533
1534    /* we need to do the following operations only once per frame */
1535    if (dri2_surf->back)
1536       return 0;
1537
1538    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
1539        dri2_surf->base.Height != dri2_surf->wl_win->height) {
1540
1541       dri2_wl_release_buffers(dri2_surf);
1542
1543       dri2_surf->base.Width  = dri2_surf->wl_win->width;
1544       dri2_surf->base.Height = dri2_surf->wl_win->height;
1545       dri2_surf->dx = dri2_surf->wl_win->dx;
1546       dri2_surf->dy = dri2_surf->wl_win->dy;
1547       dri2_surf->current = NULL;
1548    }
1549
1550    /* find back buffer */
1551
1552    /* There might be a buffer release already queued that wasn't processed */
1553    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
1554
1555    /* try get free buffer already created */
1556    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1557       if (!dri2_surf->color_buffers[i].locked &&
1558           dri2_surf->color_buffers[i].wl_buffer) {
1559           dri2_surf->back = &dri2_surf->color_buffers[i];
1560           break;
1561       }
1562    }
1563
1564    /* else choose any another free location */
1565    if (!dri2_surf->back) {
1566       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1567          if (!dri2_surf->color_buffers[i].locked) {
1568              dri2_surf->back = &dri2_surf->color_buffers[i];
1569              if (!dri2_wl_swrast_allocate_buffer(dri2_surf,
1570                                                  dri2_surf->format,
1571                                                  dri2_surf->base.Width,
1572                                                  dri2_surf->base.Height,
1573                                                  &dri2_surf->back->data,
1574                                                  &dri2_surf->back->data_size,
1575                                                  &dri2_surf->back->wl_buffer)) {
1576                 _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
1577                  return -1;
1578              }
1579              wl_buffer_add_listener(dri2_surf->back->wl_buffer,
1580                                     &wl_buffer_listener, dri2_surf);
1581              break;
1582          }
1583       }
1584    }
1585
1586    if (!dri2_surf->back) {
1587       _eglError(EGL_BAD_ALLOC, "failed to find free buffer");
1588       return -1;
1589    }
1590
1591    dri2_surf->back->locked = true;
1592
1593    /* If we have an extra unlocked buffer at this point, we had to do triple
1594     * buffering for a while, but now can go back to just double buffering.
1595     * That means we can free any unlocked buffer now. */
1596    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1597       if (!dri2_surf->color_buffers[i].locked &&
1598           dri2_surf->color_buffers[i].wl_buffer) {
1599          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
1600          munmap(dri2_surf->color_buffers[i].data,
1601                 dri2_surf->color_buffers[i].data_size);
1602          dri2_surf->color_buffers[i].wl_buffer = NULL;
1603          dri2_surf->color_buffers[i].data = NULL;
1604       }
1605    }
1606
1607    return 0;
1608 }
1609
1610 static void*
1611 dri2_wl_swrast_get_frontbuffer_data(struct dri2_egl_surface *dri2_surf)
1612 {
1613    /* if there has been a resize: */
1614    if (!dri2_surf->current)
1615       return NULL;
1616
1617    return dri2_surf->current->data;
1618 }
1619
1620 static void*
1621 dri2_wl_swrast_get_backbuffer_data(struct dri2_egl_surface *dri2_surf)
1622 {
1623    assert(dri2_surf->back);
1624    return dri2_surf->back->data;
1625 }
1626
1627 static void
1628 dri2_wl_swrast_commit_backbuffer(struct dri2_egl_surface *dri2_surf)
1629 {
1630    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
1631
1632    while (dri2_surf->throttle_callback != NULL)
1633       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1634                                     dri2_surf->wl_queue) == -1)
1635          return;
1636
1637    if (dri2_surf->base.SwapInterval > 0) {
1638       dri2_surf->throttle_callback =
1639          wl_surface_frame(dri2_surf->wl_surface_wrapper);
1640       wl_callback_add_listener(dri2_surf->throttle_callback,
1641                                &throttle_listener, dri2_surf);
1642    }
1643
1644    dri2_surf->current = dri2_surf->back;
1645    dri2_surf->back = NULL;
1646
1647    wl_surface_attach(dri2_surf->wl_surface_wrapper,
1648                      dri2_surf->current->wl_buffer,
1649                      dri2_surf->dx, dri2_surf->dy);
1650
1651    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1652    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1653    /* reset resize growing parameters */
1654    dri2_surf->dx = 0;
1655    dri2_surf->dy = 0;
1656
1657    wl_surface_damage(dri2_surf->wl_surface_wrapper,
1658                      0, 0, INT32_MAX, INT32_MAX);
1659    wl_surface_commit(dri2_surf->wl_surface_wrapper);
1660
1661    /* If we're not waiting for a frame callback then we'll at least throttle
1662     * to a sync callback so that we always give a chance for the compositor to
1663     * handle the commit and send a release event before checking for a free
1664     * buffer */
1665    if (dri2_surf->throttle_callback == NULL) {
1666       dri2_surf->throttle_callback = wl_display_sync(dri2_dpy->wl_dpy_wrapper);
1667       wl_callback_add_listener(dri2_surf->throttle_callback,
1668                                &throttle_listener, dri2_surf);
1669    }
1670
1671    wl_display_flush(dri2_dpy->wl_dpy);
1672 }
1673
1674 static void
1675 dri2_wl_swrast_get_drawable_info(__DRIdrawable * draw,
1676                                  int *x, int *y, int *w, int *h,
1677                                  void *loaderPrivate)
1678 {
1679    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1680
1681    (void) swrast_update_buffers(dri2_surf);
1682    *x = 0;
1683    *y = 0;
1684    *w = dri2_surf->base.Width;
1685    *h = dri2_surf->base.Height;
1686 }
1687
1688 static void
1689 dri2_wl_swrast_get_image(__DRIdrawable * read,
1690                          int x, int y, int w, int h,
1691                          char *data, void *loaderPrivate)
1692 {
1693    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1694    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1695    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1696    int src_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1697    int dst_stride = copy_width;
1698    char *src, *dst;
1699
1700    src = dri2_wl_swrast_get_frontbuffer_data(dri2_surf);
1701    if (!src) {
1702       memset(data, 0, copy_width * h);
1703       return;
1704    }
1705
1706    assert(data != src);
1707    assert(copy_width <= src_stride);
1708
1709    src += x_offset;
1710    src += y * src_stride;
1711    dst = data;
1712
1713    if (copy_width > src_stride-x_offset)
1714       copy_width = src_stride-x_offset;
1715    if (h > dri2_surf->base.Height-y)
1716       h = dri2_surf->base.Height-y;
1717
1718    for (; h>0; h--) {
1719       memcpy(dst, src, copy_width);
1720       src += src_stride;
1721       dst += dst_stride;
1722    }
1723 }
1724
1725 static void
1726 dri2_wl_swrast_put_image2(__DRIdrawable * draw, int op,
1727                          int x, int y, int w, int h, int stride,
1728                          char *data, void *loaderPrivate)
1729 {
1730    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1731    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1732    int dst_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1733    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1734    char *src, *dst;
1735
1736    assert(copy_width <= stride);
1737
1738    (void) swrast_update_buffers(dri2_surf);
1739    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
1740
1741    /* partial copy, copy old content */
1742    if (copy_width < dst_stride)
1743       dri2_wl_swrast_get_image(draw, 0, 0,
1744                                dri2_surf->base.Width, dri2_surf->base.Height,
1745                                dst, loaderPrivate);
1746
1747    dst += x_offset;
1748    dst += y * dst_stride;
1749
1750    src = data;
1751
1752    /* drivers expect we do these checks (and some rely on it) */
1753    if (copy_width > dst_stride-x_offset)
1754       copy_width = dst_stride-x_offset;
1755    if (h > dri2_surf->base.Height-y)
1756       h = dri2_surf->base.Height-y;
1757
1758    for (; h>0; h--) {
1759       memcpy(dst, src, copy_width);
1760       src += stride;
1761       dst += dst_stride;
1762    }
1763    dri2_wl_swrast_commit_backbuffer(dri2_surf);
1764 }
1765
1766 static void
1767 dri2_wl_swrast_put_image(__DRIdrawable * draw, int op,
1768                          int x, int y, int w, int h,
1769                          char *data, void *loaderPrivate)
1770 {
1771    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1772    int stride;
1773
1774    stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1775    dri2_wl_swrast_put_image2(draw, op, x, y, w, h,
1776                              stride, data, loaderPrivate);
1777 }
1778
1779 static EGLBoolean
1780 dri2_wl_swrast_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1781 {
1782    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1783    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1784
1785    dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1786    return EGL_TRUE;
1787 }
1788
1789 static void
1790 shm_handle_format(void *data, struct wl_shm *shm, uint32_t format)
1791 {
1792    struct dri2_egl_display *dri2_dpy = data;
1793
1794    switch (format) {
1795    case WL_SHM_FORMAT_ARGB8888:
1796       dri2_dpy->formats |= HAS_ARGB8888;
1797       break;
1798    case WL_SHM_FORMAT_XRGB8888:
1799       dri2_dpy->formats |= HAS_XRGB8888;
1800       break;
1801    case WL_SHM_FORMAT_RGB565:
1802       dri2_dpy->formats |= HAS_RGB565;
1803       break;
1804    }
1805 }
1806
1807 static const struct wl_shm_listener shm_listener = {
1808    .format = shm_handle_format
1809 };
1810
1811 static void
1812 registry_handle_global_swrast(void *data, struct wl_registry *registry,
1813                               uint32_t name, const char *interface,
1814                               uint32_t version)
1815 {
1816    struct dri2_egl_display *dri2_dpy = data;
1817
1818    if (strcmp(interface, "wl_shm") == 0) {
1819       dri2_dpy->wl_shm =
1820          wl_registry_bind(registry, name, &wl_shm_interface, 1);
1821       wl_shm_add_listener(dri2_dpy->wl_shm, &shm_listener, dri2_dpy);
1822    }
1823 }
1824
1825 static const struct wl_registry_listener registry_listener_swrast = {
1826    .global = registry_handle_global_swrast,
1827    .global_remove = registry_handle_global_remove
1828 };
1829
1830 static const struct dri2_egl_display_vtbl dri2_wl_swrast_display_vtbl = {
1831    .authenticate = NULL,
1832    .create_window_surface = dri2_wl_create_window_surface,
1833    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1834    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1835    .destroy_surface = dri2_wl_destroy_surface,
1836    .create_image = dri2_create_image_khr,
1837    .swap_buffers = dri2_wl_swrast_swap_buffers,
1838    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1839    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1840    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1841    .copy_buffers = dri2_fallback_copy_buffers,
1842    .query_buffer_age = dri2_fallback_query_buffer_age,
1843    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1844    .get_sync_values = dri2_fallback_get_sync_values,
1845    .get_dri_drawable = dri2_surface_get_dri_drawable,
1846 };
1847
1848 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1849    .base = { __DRI_SWRAST_LOADER, 2 },
1850
1851    .getDrawableInfo = dri2_wl_swrast_get_drawable_info,
1852    .putImage        = dri2_wl_swrast_put_image,
1853    .getImage        = dri2_wl_swrast_get_image,
1854    .putImage2       = dri2_wl_swrast_put_image2,
1855 };
1856
1857 static const __DRIextension *swrast_loader_extensions[] = {
1858    &swrast_loader_extension.base,
1859    &image_lookup_extension.base,
1860    NULL,
1861 };
1862
1863 static EGLBoolean
1864 dri2_initialize_wayland_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1865 {
1866    struct dri2_egl_display *dri2_dpy;
1867
1868    loader_set_logger(_eglLog);
1869
1870    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1871    if (!dri2_dpy)
1872       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1873
1874    dri2_dpy->fd = -1;
1875    disp->DriverData = (void *) dri2_dpy;
1876    if (disp->PlatformDisplay == NULL) {
1877       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1878       if (dri2_dpy->wl_dpy == NULL)
1879          goto cleanup;
1880       dri2_dpy->own_device = true;
1881    } else {
1882       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1883    }
1884
1885    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1886
1887    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1888    if (dri2_dpy->wl_dpy_wrapper == NULL)
1889       goto cleanup;
1890
1891    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1892                       dri2_dpy->wl_queue);
1893
1894    if (dri2_dpy->own_device)
1895       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1896
1897    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1898    wl_registry_add_listener(dri2_dpy->wl_registry,
1899                             &registry_listener_swrast, dri2_dpy);
1900
1901    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_shm == NULL)
1902       goto cleanup;
1903
1904    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->formats == 0)
1905       goto cleanup;
1906
1907    dri2_dpy->driver_name = strdup("swrast");
1908    if (!dri2_load_driver_swrast(disp))
1909       goto cleanup;
1910
1911    dri2_dpy->loader_extensions = swrast_loader_extensions;
1912
1913    if (!dri2_create_screen(disp))
1914       goto cleanup;
1915
1916    if (!dri2_setup_extensions(disp))
1917       goto cleanup;
1918
1919    dri2_setup_screen(disp);
1920
1921    dri2_wl_setup_swap_interval(disp);
1922
1923    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1924       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1925       goto cleanup;
1926    }
1927
1928    /* Fill vtbl last to prevent accidentally calling virtual function during
1929     * initialization.
1930     */
1931    dri2_dpy->vtbl = &dri2_wl_swrast_display_vtbl;
1932
1933    return EGL_TRUE;
1934
1935  cleanup:
1936    dri2_display_destroy(disp);
1937    return EGL_FALSE;
1938 }
1939
1940 EGLBoolean
1941 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
1942 {
1943    EGLBoolean initialized = EGL_TRUE;
1944
1945    bool hw_accel = !env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
1946
1947    if (hw_accel) {
1948       if (!dri2_initialize_wayland_drm(drv, disp)) {
1949          initialized = dri2_initialize_wayland_swrast(drv, disp);
1950       }
1951    } else {
1952       initialized = dri2_initialize_wayland_swrast(drv, disp);
1953    }
1954
1955    return initialized;
1956
1957 }