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-uapi/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 "util/anon_file.h"
  47 #include "eglglobals.h"
  48
  49 #include <wayland-egl-backend.h>
  50 #include <wayland-client.h>
  51 #include "wayland-drm-client-protocol.h"
  52 #include "linux-dmabuf-unstable-v1-client-protocol.h"
  53
  54 /* cheesy workaround until wayland 1.18 is released */
  55 #if WAYLAND_VERSION_MAJOR > 1 || \
  56    (WAYLAND_VERSION_MAJOR == 1 && WAYLAND_VERSION_MINOR < 18)
  57 #define WL_SHM_FORMAT_ABGR16161616F 0x48344241
  58 #define WL_SHM_FORMAT_XBGR16161616F 0x48344258
  59 #endif
  60
  61 /*
  62  * The index of entries in this table is used as a bitmask in
  63  * dri2_dpy->formats, which tracks the formats supported by our server.
  64  */
  65 static const struct dri2_wl_visual {
  66    const char *format_name;
  67    uint32_t wl_drm_format;
  68    uint32_t wl_shm_format;
  69    int dri_image_format;
  70    /* alt_dri_image_format is a substitute wl_buffer format to use for a
  71     * wl-server unsupported dri_image_format, ie. some other dri_image_format in
  72     * the table, of the same precision but with different channel ordering, or
  73     * __DRI_IMAGE_FORMAT_NONE if an alternate format is not needed or supported.
  74     * The code checks if alt_dri_image_format can be used as a fallback for a
  75     * dri_image_format for a given wl-server implementation.
  76     */
  77    int alt_dri_image_format;
  78    int bpp;
  79    int rgba_shifts[4];
  80    unsigned int rgba_sizes[4];
  81 } dri2_wl_visuals[] = {
  82    {
  83       "ABGR16F",
  84       WL_DRM_FORMAT_ABGR16F, WL_SHM_FORMAT_ABGR16161616F,
  85       __DRI_IMAGE_FORMAT_ABGR16161616F, 0, 64,
  86       { 0, 16, 32, 48 },
  87       { 16, 16, 16, 16 },
  88    },
  89    {
  90       "XBGR16F",
  91       WL_DRM_FORMAT_XBGR16F, WL_SHM_FORMAT_XBGR16161616F,
  92       __DRI_IMAGE_FORMAT_XBGR16161616F, 0, 64,
  93       { 0, 16, 32, -1 },
  94       { 16, 16, 16, 0 },
  95    },
  96    {
  97       "XRGB2101010",
  98       WL_DRM_FORMAT_XRGB2101010, WL_SHM_FORMAT_XRGB2101010,
  99       __DRI_IMAGE_FORMAT_XRGB2101010, __DRI_IMAGE_FORMAT_XBGR2101010, 32,
 100       { 20, 10, 0, -1 },
 101       { 10, 10, 10, 0 },
 102    },
 103    {
 104       "ARGB2101010",
 105       WL_DRM_FORMAT_ARGB2101010, WL_SHM_FORMAT_ARGB2101010,
 106       __DRI_IMAGE_FORMAT_ARGB2101010, __DRI_IMAGE_FORMAT_ABGR2101010, 32,
 107       { 20, 10, 0, 30 },
 108       { 10, 10, 10, 2 },
 109    },
 110    {
 111       "XBGR2101010",
 112       WL_DRM_FORMAT_XBGR2101010, WL_SHM_FORMAT_XBGR2101010,
 113       __DRI_IMAGE_FORMAT_XBGR2101010, __DRI_IMAGE_FORMAT_XRGB2101010, 32,
 114       { 0, 10, 20, -1 },
 115       { 10, 10, 10, 0 },
 116    },
 117    {
 118       "ABGR2101010",
 119       WL_DRM_FORMAT_ABGR2101010, WL_SHM_FORMAT_ABGR2101010,
 120       __DRI_IMAGE_FORMAT_ABGR2101010, __DRI_IMAGE_FORMAT_ARGB2101010, 32,
 121       { 0, 10, 20, 30 },
 122       { 10, 10, 10, 2 },
 123    },
 124    {
 125       "XRGB8888",
 126       WL_DRM_FORMAT_XRGB8888, WL_SHM_FORMAT_XRGB8888,
 127       __DRI_IMAGE_FORMAT_XRGB8888, __DRI_IMAGE_FORMAT_NONE, 32,
 128       { 16, 8, 0, -1 },
 129       { 8, 8, 8, 0 },
 130    },
 131    {
 132       "ARGB8888",
 133       WL_DRM_FORMAT_ARGB8888, WL_SHM_FORMAT_ARGB8888,
 134       __DRI_IMAGE_FORMAT_ARGB8888, __DRI_IMAGE_FORMAT_NONE, 32,
 135       { 16, 8, 0, 24 },
 136       { 8, 8, 8, 8 },
 137    },
 138    {
 139       "RGB565",
 140       WL_DRM_FORMAT_RGB565, WL_SHM_FORMAT_RGB565,
 141       __DRI_IMAGE_FORMAT_RGB565, __DRI_IMAGE_FORMAT_NONE, 16,
 142       { 11, 5, 0, -1 },
 143       { 5, 6, 5, 0 },
 144    },
 145 };
 146
 147 static_assert(ARRAY_SIZE(dri2_wl_visuals) <= EGL_DRI2_MAX_FORMATS,
 148               "dri2_egl_display::formats is not large enough for "
 149               "the formats in dri2_wl_visuals");
 150
 151 static int
 152 dri2_wl_visual_idx_from_config(struct dri2_egl_display *dri2_dpy,
 153                                const __DRIconfig *config)
 154 {
 155    int shifts[4];
 156    unsigned int sizes[4];
 157
 158    dri2_get_shifts_and_sizes(dri2_dpy->core, config, shifts, sizes);
 159
 160    for (unsigned int i = 0; i < ARRAY_SIZE(dri2_wl_visuals); i++) {
 161       const struct dri2_wl_visual *wl_visual = &dri2_wl_visuals[i];
 162
 163       if (shifts[0] == wl_visual->rgba_shifts[0] &&
 164           shifts[1] == wl_visual->rgba_shifts[1] &&
 165           shifts[2] == wl_visual->rgba_shifts[2] &&
 166           shifts[3] == wl_visual->rgba_shifts[3] &&
 167           sizes[0] == wl_visual->rgba_sizes[0] &&
 168           sizes[1] == wl_visual->rgba_sizes[1] &&
 169           sizes[2] == wl_visual->rgba_sizes[2] &&
 170           sizes[3] == wl_visual->rgba_sizes[3]) {
 171          return i;
 172       }
 173    }
 174
 175    return -1;
 176 }
 177
 178 static int
 179 dri2_wl_visual_idx_from_fourcc(uint32_t fourcc)
 180 {
 181    for (int i = 0; i < ARRAY_SIZE(dri2_wl_visuals); i++) {
 182       /* wl_drm format codes overlap with DRIImage FourCC codes for all formats
 183        * we support. */
 184       if (dri2_wl_visuals[i].wl_drm_format == fourcc)
 185          return i;
 186    }
 187
 188    return -1;
 189 }
 190
 191 static int
 192 dri2_wl_visual_idx_from_dri_image_format(uint32_t dri_image_format)
 193 {
 194    for (int i = 0; i < ARRAY_SIZE(dri2_wl_visuals); i++) {
 195       if (dri2_wl_visuals[i].dri_image_format == dri_image_format)
 196          return i;
 197    }
 198
 199    return -1;
 200 }
 201
 202 static int
 203 dri2_wl_visual_idx_from_shm_format(uint32_t shm_format)
 204 {
 205    for (int i = 0; i < ARRAY_SIZE(dri2_wl_visuals); i++) {
 206       if (dri2_wl_visuals[i].wl_shm_format == shm_format)
 207          return i;
 208    }
 209
 210    return -1;
 211 }
 212
 213 bool
 214 dri2_wl_is_format_supported(void* user_data, uint32_t format)
 215 {
 216    _EGLDisplay *disp = (_EGLDisplay *) user_data;
 217    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 218    int j = dri2_wl_visual_idx_from_fourcc(format);
 219
 220    if (j == -1)
 221       return false;
 222
 223    for (int i = 0; dri2_dpy->driver_configs[i]; i++)
 224       if (j == dri2_wl_visual_idx_from_config(dri2_dpy,
 225                                               dri2_dpy->driver_configs[i]))
 226          return true;
 227
 228    return false;
 229 }
 230
 231 static int
 232 roundtrip(struct dri2_egl_display *dri2_dpy)
 233 {
 234    return wl_display_roundtrip_queue(dri2_dpy->wl_dpy, dri2_dpy->wl_queue);
 235 }
 236
 237 static void
 238 wl_buffer_release(void *data, struct wl_buffer *buffer)
 239 {
 240    struct dri2_egl_surface *dri2_surf = data;
 241    int i;
 242
 243    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); ++i)
 244       if (dri2_surf->color_buffers[i].wl_buffer == buffer)
 245          break;
 246
 247    assert (i < ARRAY_SIZE(dri2_surf->color_buffers));
 248
 249    if (dri2_surf->color_buffers[i].wl_release) {
 250       wl_buffer_destroy(buffer);
 251       dri2_surf->color_buffers[i].wl_release = false;
 252       dri2_surf->color_buffers[i].wl_buffer = NULL;
 253    }
 254
 255    dri2_surf->color_buffers[i].locked = false;
 256 }
 257
 258 static const struct wl_buffer_listener wl_buffer_listener = {
 259    .release = wl_buffer_release
 260 };
 261
 262 static void
 263 resize_callback(struct wl_egl_window *wl_win, void *data)
 264 {
 265    struct dri2_egl_surface *dri2_surf = data;
 266    struct dri2_egl_display *dri2_dpy =
 267       dri2_egl_display(dri2_surf->base.Resource.Display);
 268
 269    /* Update the surface size as soon as native window is resized; from user
 270     * pov, this makes the effect that resize is done immediately after native
 271     * window resize, without requiring to wait until the first draw.
 272     *
 273     * A more detailed and lengthy explanation can be found at
 274     * https://lists.freedesktop.org/archives/mesa-dev/2018-June/196474.html
 275     */
 276    if (!dri2_surf->back) {
 277       dri2_surf->base.Width = wl_win->width;
 278       dri2_surf->base.Height = wl_win->height;
 279    }
 280    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 281 }
 282
 283 static void
 284 destroy_window_callback(void *data)
 285 {
 286    struct dri2_egl_surface *dri2_surf = data;
 287    dri2_surf->wl_win = NULL;
 288 }
 289
 290 static struct wl_surface *
 291 get_wl_surface_proxy(struct wl_egl_window *window)
 292 {
 293     /* Version 3 of wl_egl_window introduced a version field at the same
 294      * location where a pointer to wl_surface was stored. Thus, if
 295      * window->version is dereferenceable, we've been given an older version of
 296      * wl_egl_window, and window->version points to wl_surface */
 297    if (_eglPointerIsDereferencable((void *)(window->version))) {
 298       return wl_proxy_create_wrapper((void *)(window->version));
 299    }
 300    return wl_proxy_create_wrapper(window->surface);
 301 }
 302
 303 /**
 304  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 305  */
 306 static _EGLSurface *
 307 dri2_wl_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 308                               _EGLConfig *conf, void *native_window,
 309                               const EGLint *attrib_list)
 310 {
 311    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 312    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 313    struct wl_egl_window *window = native_window;
 314    struct dri2_egl_surface *dri2_surf;
 315    int visual_idx;
 316    const __DRIconfig *config;
 317
 318    dri2_surf = calloc(1, sizeof *dri2_surf);
 319    if (!dri2_surf) {
 320       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 321       return NULL;
 322    }
 323
 324    if (!dri2_init_surface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf,
 325                           attrib_list, false, native_window))
 326       goto cleanup_surf;
 327
 328    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 329                                 dri2_surf->base.GLColorspace);
 330
 331    if (!config) {
 332       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 333       goto cleanup_surf;
 334    }
 335
 336    dri2_surf->base.Width = window->width;
 337    dri2_surf->base.Height = window->height;
 338
 339    visual_idx = dri2_wl_visual_idx_from_config(dri2_dpy, config);
 340    assert(visual_idx != -1);
 341
 342    if (dri2_dpy->wl_dmabuf || dri2_dpy->wl_drm) {
 343       dri2_surf->format = dri2_wl_visuals[visual_idx].wl_drm_format;
 344    } else {
 345       assert(dri2_dpy->wl_shm);
 346       dri2_surf->format = dri2_wl_visuals[visual_idx].wl_shm_format;
 347    }
 348
 349    dri2_surf->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
 350    if (!dri2_surf->wl_queue) {
 351       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 352       goto cleanup_surf;
 353    }
 354
 355    if (dri2_dpy->wl_drm) {
 356       dri2_surf->wl_drm_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_drm);
 357       if (!dri2_surf->wl_drm_wrapper) {
 358          _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 359          goto cleanup_queue;
 360       }
 361       wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_drm_wrapper,
 362                          dri2_surf->wl_queue);
 363    }
 364
 365    dri2_surf->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
 366    if (!dri2_surf->wl_dpy_wrapper) {
 367       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 368       goto cleanup_drm;
 369    }
 370    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_dpy_wrapper,
 371                       dri2_surf->wl_queue);
 372
 373    dri2_surf->wl_surface_wrapper = get_wl_surface_proxy(window);
 374    if (!dri2_surf->wl_surface_wrapper) {
 375       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 376       goto cleanup_dpy_wrapper;
 377    }
 378    wl_proxy_set_queue((struct wl_proxy *)dri2_surf->wl_surface_wrapper,
 379                       dri2_surf->wl_queue);
 380
 381    dri2_surf->wl_win = window;
 382    dri2_surf->wl_win->driver_private = dri2_surf;
 383    dri2_surf->wl_win->destroy_window_callback = destroy_window_callback;
 384    if (dri2_dpy->flush)
 385       dri2_surf->wl_win->resize_callback = resize_callback;
 386
 387    if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf))
 388        goto cleanup_surf_wrapper;
 389
 390    dri2_surf->base.SwapInterval = dri2_dpy->default_swap_interval;
 391
 392    return &dri2_surf->base;
 393
 394  cleanup_surf_wrapper:
 395    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 396  cleanup_dpy_wrapper:
 397    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 398  cleanup_drm:
 399    if (dri2_surf->wl_drm_wrapper)
 400       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 401  cleanup_queue:
 402    wl_event_queue_destroy(dri2_surf->wl_queue);
 403  cleanup_surf:
 404    free(dri2_surf);
 405
 406    return NULL;
 407 }
 408
 409 static _EGLSurface *
 410 dri2_wl_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 411                               _EGLConfig *conf, void *native_window,
 412                               const EGLint *attrib_list)
 413 {
 414    /* From the EGL_EXT_platform_wayland spec, version 3:
 415     *
 416     *   It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 417     *   that belongs to Wayland. Any such call fails and generates
 418     *   EGL_BAD_PARAMETER.
 419     */
 420    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on "
 421              "Wayland");
 422    return NULL;
 423 }
 424
 425 /**
 426  * Called via eglDestroySurface(), drv->API.DestroySurface().
 427  */
 428 static EGLBoolean
 429 dri2_wl_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 430 {
 431    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 432    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 433
 434    (void) drv;
 435
 436    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 437
 438    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 439       if (dri2_surf->color_buffers[i].wl_buffer)
 440          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 441       if (dri2_surf->color_buffers[i].dri_image)
 442          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 443       if (dri2_surf->color_buffers[i].linear_copy)
 444          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 445       if (dri2_surf->color_buffers[i].data)
 446          munmap(dri2_surf->color_buffers[i].data,
 447                 dri2_surf->color_buffers[i].data_size);
 448    }
 449
 450    if (dri2_dpy->dri2)
 451       dri2_egl_surface_free_local_buffers(dri2_surf);
 452
 453    if (dri2_surf->throttle_callback)
 454       wl_callback_destroy(dri2_surf->throttle_callback);
 455
 456    if (dri2_surf->wl_win) {
 457       dri2_surf->wl_win->driver_private = NULL;
 458       dri2_surf->wl_win->resize_callback = NULL;
 459       dri2_surf->wl_win->destroy_window_callback = NULL;
 460    }
 461
 462    wl_proxy_wrapper_destroy(dri2_surf->wl_surface_wrapper);
 463    wl_proxy_wrapper_destroy(dri2_surf->wl_dpy_wrapper);
 464    if (dri2_surf->wl_drm_wrapper)
 465       wl_proxy_wrapper_destroy(dri2_surf->wl_drm_wrapper);
 466    wl_event_queue_destroy(dri2_surf->wl_queue);
 467
 468    dri2_fini_surface(surf);
 469    free(surf);
 470
 471    return EGL_TRUE;
 472 }
 473
 474 static void
 475 dri2_wl_release_buffers(struct dri2_egl_surface *dri2_surf)
 476 {
 477    struct dri2_egl_display *dri2_dpy =
 478       dri2_egl_display(dri2_surf->base.Resource.Display);
 479
 480    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 481       if (dri2_surf->color_buffers[i].wl_buffer) {
 482          if (dri2_surf->color_buffers[i].locked) {
 483             dri2_surf->color_buffers[i].wl_release = true;
 484          } else {
 485             wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 486             dri2_surf->color_buffers[i].wl_buffer = NULL;
 487          }
 488       }
 489       if (dri2_surf->color_buffers[i].dri_image)
 490          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 491       if (dri2_surf->color_buffers[i].linear_copy)
 492          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 493       if (dri2_surf->color_buffers[i].data)
 494          munmap(dri2_surf->color_buffers[i].data,
 495                 dri2_surf->color_buffers[i].data_size);
 496
 497       dri2_surf->color_buffers[i].dri_image = NULL;
 498       dri2_surf->color_buffers[i].linear_copy = NULL;
 499       dri2_surf->color_buffers[i].data = NULL;
 500    }
 501
 502    if (dri2_dpy->dri2)
 503       dri2_egl_surface_free_local_buffers(dri2_surf);
 504 }
 505
 506 static int
 507 get_back_bo(struct dri2_egl_surface *dri2_surf)
 508 {
 509    struct dri2_egl_display *dri2_dpy =
 510       dri2_egl_display(dri2_surf->base.Resource.Display);
 511    int use_flags;
 512    int visual_idx;
 513    unsigned int dri_image_format;
 514    unsigned int linear_dri_image_format;
 515    uint64_t *modifiers;
 516    int num_modifiers;
 517
 518    visual_idx = dri2_wl_visual_idx_from_fourcc(dri2_surf->format);
 519    assert(visual_idx != -1);
 520    dri_image_format = dri2_wl_visuals[visual_idx].dri_image_format;
 521    linear_dri_image_format = dri_image_format;
 522    modifiers = u_vector_tail(&dri2_dpy->wl_modifiers[visual_idx]);
 523    num_modifiers = u_vector_length(&dri2_dpy->wl_modifiers[visual_idx]);
 524
 525    /* Substitute dri image format if server does not support original format */
 526    if (!BITSET_TEST(dri2_dpy->formats, visual_idx))
 527       linear_dri_image_format = dri2_wl_visuals[visual_idx].alt_dri_image_format;
 528
 529    /* These asserts hold, as long as dri2_wl_visuals[] is self-consistent and
 530     * the PRIME substitution logic in dri2_wl_add_configs_for_visuals() is free
 531     * of bugs.
 532     */
 533    assert(linear_dri_image_format != __DRI_IMAGE_FORMAT_NONE);
 534    assert(BITSET_TEST(dri2_dpy->formats,
 535           dri2_wl_visual_idx_from_dri_image_format(linear_dri_image_format)));
 536
 537    /* There might be a buffer release already queued that wasn't processed */
 538    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
 539
 540    while (dri2_surf->back == NULL) {
 541       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 542          /* Get an unlocked buffer, preferably one with a dri_buffer
 543           * already allocated. */
 544          if (dri2_surf->color_buffers[i].locked)
 545             continue;
 546          if (dri2_surf->back == NULL)
 547             dri2_surf->back = &dri2_surf->color_buffers[i];
 548          else if (dri2_surf->back->dri_image == NULL)
 549             dri2_surf->back = &dri2_surf->color_buffers[i];
 550       }
 551
 552       if (dri2_surf->back)
 553          break;
 554
 555       /* If we don't have a buffer, then block on the server to release one for
 556        * us, and try again. wl_display_dispatch_queue will process any pending
 557        * events, however not all servers flush on issuing a buffer release
 558        * event. So, we spam the server with roundtrips as they always cause a
 559        * client flush.
 560        */
 561       if (wl_display_roundtrip_queue(dri2_dpy->wl_dpy,
 562                                      dri2_surf->wl_queue) < 0)
 563           return -1;
 564    }
 565
 566    if (dri2_surf->back == NULL)
 567       return -1;
 568
 569    use_flags = __DRI_IMAGE_USE_SHARE | __DRI_IMAGE_USE_BACKBUFFER;
 570
 571    if (dri2_dpy->is_different_gpu &&
 572        dri2_surf->back->linear_copy == NULL) {
 573       /* The LINEAR modifier should be a perfect alias of the LINEAR use
 574        * flag; try the new interface first before the old, then fall back. */
 575       if (dri2_dpy->image->base.version >= 15 &&
 576            dri2_dpy->image->createImageWithModifiers) {
 577          uint64_t linear_mod = DRM_FORMAT_MOD_LINEAR;
 578
 579          dri2_surf->back->linear_copy =
 580             dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 581                                                       dri2_surf->base.Width,
 582                                                       dri2_surf->base.Height,
 583                                                       linear_dri_image_format,
 584                                                       &linear_mod,
 585                                                       1,
 586                                                       NULL);
 587       } else {
 588          dri2_surf->back->linear_copy =
 589             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 590                                          dri2_surf->base.Width,
 591                                          dri2_surf->base.Height,
 592                                          linear_dri_image_format,
 593                                          use_flags |
 594                                          __DRI_IMAGE_USE_LINEAR,
 595                                          NULL);
 596       }
 597       if (dri2_surf->back->linear_copy == NULL)
 598           return -1;
 599    }
 600
 601    if (dri2_surf->back->dri_image == NULL) {
 602       /* If our DRIImage implementation does not support
 603        * createImageWithModifiers, then fall back to the old createImage,
 604        * and hope it allocates an image which is acceptable to the winsys.
 605         */
 606       if (num_modifiers && dri2_dpy->image->base.version >= 15 &&
 607           dri2_dpy->image->createImageWithModifiers) {
 608          dri2_surf->back->dri_image =
 609            dri2_dpy->image->createImageWithModifiers(dri2_dpy->dri_screen,
 610                                                      dri2_surf->base.Width,
 611                                                      dri2_surf->base.Height,
 612                                                      dri_image_format,
 613                                                      modifiers,
 614                                                      num_modifiers,
 615                                                      NULL);
 616       } else {
 617          dri2_surf->back->dri_image =
 618             dri2_dpy->image->createImage(dri2_dpy->dri_screen,
 619                                          dri2_surf->base.Width,
 620                                          dri2_surf->base.Height,
 621                                          dri_image_format,
 622                                          dri2_dpy->is_different_gpu ?
 623                                               0 : use_flags,
 624                                          NULL);
 625       }
 626
 627       dri2_surf->back->age = 0;
 628    }
 629    if (dri2_surf->back->dri_image == NULL)
 630       return -1;
 631
 632    dri2_surf->back->locked = true;
 633
 634    return 0;
 635 }
 636
 637
 638 static void
 639 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 640 {
 641    struct dri2_egl_display *dri2_dpy =
 642       dri2_egl_display(dri2_surf->base.Resource.Display);
 643    __DRIimage *image;
 644    int name, pitch;
 645
 646    image = dri2_surf->back->dri_image;
 647
 648    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 649    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 650
 651    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 652    buffer->name = name;
 653    buffer->pitch = pitch;
 654    buffer->cpp = 4;
 655    buffer->flags = 0;
 656 }
 657
 658 static int
 659 update_buffers(struct dri2_egl_surface *dri2_surf)
 660 {
 661    struct dri2_egl_display *dri2_dpy =
 662       dri2_egl_display(dri2_surf->base.Resource.Display);
 663
 664    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
 665        dri2_surf->base.Height != dri2_surf->wl_win->height) {
 666
 667       dri2_surf->base.Width  = dri2_surf->wl_win->width;
 668       dri2_surf->base.Height = dri2_surf->wl_win->height;
 669       dri2_surf->dx = dri2_surf->wl_win->dx;
 670       dri2_surf->dy = dri2_surf->wl_win->dy;
 671    }
 672
 673    if (dri2_surf->base.Width != dri2_surf->wl_win->attached_width ||
 674        dri2_surf->base.Height != dri2_surf->wl_win->attached_height) {
 675       dri2_wl_release_buffers(dri2_surf);
 676    }
 677
 678    if (get_back_bo(dri2_surf) < 0) {
 679       _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 680       return -1;
 681    }
 682
 683    /* If we have an extra unlocked buffer at this point, we had to do triple
 684     * buffering for a while, but now can go back to just double buffering.
 685     * That means we can free any unlocked buffer now. */
 686    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 687       if (!dri2_surf->color_buffers[i].locked &&
 688           dri2_surf->color_buffers[i].wl_buffer) {
 689          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
 690          dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].dri_image);
 691          if (dri2_dpy->is_different_gpu)
 692             dri2_dpy->image->destroyImage(dri2_surf->color_buffers[i].linear_copy);
 693          dri2_surf->color_buffers[i].wl_buffer = NULL;
 694          dri2_surf->color_buffers[i].dri_image = NULL;
 695          dri2_surf->color_buffers[i].linear_copy = NULL;
 696       }
 697    }
 698
 699    return 0;
 700 }
 701
 702 static int
 703 update_buffers_if_needed(struct dri2_egl_surface *dri2_surf)
 704 {
 705    if (dri2_surf->back != NULL)
 706       return 0;
 707
 708    return update_buffers(dri2_surf);
 709 }
 710
 711 static __DRIbuffer *
 712 dri2_wl_get_buffers_with_format(__DRIdrawable * driDrawable,
 713                                 int *width, int *height,
 714                                 unsigned int *attachments, int count,
 715                                 int *out_count, void *loaderPrivate)
 716 {
 717    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 718    int i, j;
 719
 720    if (update_buffers(dri2_surf) < 0)
 721       return NULL;
 722
 723    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 724       __DRIbuffer *local;
 725
 726       switch (attachments[i]) {
 727       case __DRI_BUFFER_BACK_LEFT:
 728          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 729          break;
 730       default:
 731          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 732                                                      attachments[i + 1]);
 733
 734          if (!local) {
 735             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 736             return NULL;
 737          }
 738          dri2_surf->buffers[j] = *local;
 739          break;
 740       }
 741    }
 742
 743    *out_count = j;
 744    if (j == 0)
 745       return NULL;
 746
 747    *width = dri2_surf->base.Width;
 748    *height = dri2_surf->base.Height;
 749
 750    return dri2_surf->buffers;
 751 }
 752
 753 static __DRIbuffer *
 754 dri2_wl_get_buffers(__DRIdrawable * driDrawable,
 755                     int *width, int *height,
 756                     unsigned int *attachments, int count,
 757                     int *out_count, void *loaderPrivate)
 758 {
 759    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 760    unsigned int *attachments_with_format;
 761    __DRIbuffer *buffer;
 762    int visual_idx = dri2_wl_visual_idx_from_fourcc(dri2_surf->format);
 763
 764    if (visual_idx == -1)
 765       return NULL;
 766
 767    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 768    if (!attachments_with_format) {
 769       *out_count = 0;
 770       return NULL;
 771    }
 772
 773    for (int i = 0; i < count; ++i) {
 774       attachments_with_format[2*i] = attachments[i];
 775       attachments_with_format[2*i + 1] = dri2_wl_visuals[visual_idx].bpp;
 776    }
 777
 778    buffer =
 779       dri2_wl_get_buffers_with_format(driDrawable,
 780                                       width, height,
 781                                       attachments_with_format, count,
 782                                       out_count, loaderPrivate);
 783
 784    free(attachments_with_format);
 785
 786    return buffer;
 787 }
 788
 789 static int
 790 image_get_buffers(__DRIdrawable *driDrawable,
 791                   unsigned int format,
 792                   uint32_t *stamp,
 793                   void *loaderPrivate,
 794                   uint32_t buffer_mask,
 795                   struct __DRIimageList *buffers)
 796 {
 797    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 798
 799    if (update_buffers(dri2_surf) < 0)
 800       return 0;
 801
 802    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 803    buffers->back = dri2_surf->back->dri_image;
 804
 805    return 1;
 806 }
 807
 808 static void
 809 dri2_wl_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 810 {
 811    (void) driDrawable;
 812    (void) loaderPrivate;
 813 }
 814
 815 static unsigned
 816 dri2_wl_get_capability(void *loaderPrivate, enum dri_loader_cap cap)
 817 {
 818    switch (cap) {
 819    case DRI_LOADER_CAP_FP16:
 820       return 1;
 821    default:
 822       return 0;
 823    }
 824 }
 825
 826 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 827    .base = { __DRI_DRI2_LOADER, 4 },
 828
 829    .getBuffers           = dri2_wl_get_buffers,
 830    .flushFrontBuffer     = dri2_wl_flush_front_buffer,
 831    .getBuffersWithFormat = dri2_wl_get_buffers_with_format,
 832    .getCapability        = dri2_wl_get_capability,
 833 };
 834
 835 static const __DRIimageLoaderExtension image_loader_extension = {
 836    .base = { __DRI_IMAGE_LOADER, 2 },
 837
 838    .getBuffers          = image_get_buffers,
 839    .flushFrontBuffer    = dri2_wl_flush_front_buffer,
 840    .getCapability       = dri2_wl_get_capability,
 841 };
 842
 843 static void
 844 wayland_throttle_callback(void *data,
 845                           struct wl_callback *callback,
 846                           uint32_t time)
 847 {
 848    struct dri2_egl_surface *dri2_surf = data;
 849
 850    dri2_surf->throttle_callback = NULL;
 851    wl_callback_destroy(callback);
 852 }
 853
 854 static const struct wl_callback_listener throttle_listener = {
 855    .done = wayland_throttle_callback
 856 };
 857
 858 static EGLBoolean
 859 get_fourcc(struct dri2_egl_display *dri2_dpy,
 860            __DRIimage *image, int *fourcc)
 861 {
 862    EGLBoolean query;
 863    int dri_format;
 864    int visual_idx;
 865
 866    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FOURCC,
 867                                        fourcc);
 868    if (query)
 869       return true;
 870
 871    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT,
 872                                        &dri_format);
 873    if (!query)
 874       return false;
 875
 876    visual_idx = dri2_wl_visual_idx_from_dri_image_format(dri_format);
 877    if (visual_idx == -1)
 878       return false;
 879
 880    *fourcc = dri2_wl_visuals[visual_idx].wl_drm_format;
 881    return true;
 882 }
 883
 884 static struct wl_buffer *
 885 create_wl_buffer(struct dri2_egl_display *dri2_dpy,
 886                  struct dri2_egl_surface *dri2_surf,
 887                  __DRIimage *image)
 888 {
 889    struct wl_buffer *ret;
 890    EGLBoolean query;
 891    int width, height, fourcc, num_planes;
 892    uint64_t modifier = DRM_FORMAT_MOD_INVALID;
 893
 894    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_WIDTH, &width);
 895    query &= dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_HEIGHT,
 896                                         &height);
 897    query &= get_fourcc(dri2_dpy, image, &fourcc);
 898    if (!query)
 899       return NULL;
 900
 901    query = dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NUM_PLANES,
 902                                        &num_planes);
 903    if (!query)
 904       num_planes = 1;
 905
 906    if (dri2_dpy->image->base.version >= 15) {
 907       int mod_hi, mod_lo;
 908
 909       query = dri2_dpy->image->queryImage(image,
 910                                           __DRI_IMAGE_ATTRIB_MODIFIER_UPPER,
 911                                           &mod_hi);
 912       query &= dri2_dpy->image->queryImage(image,
 913                                            __DRI_IMAGE_ATTRIB_MODIFIER_LOWER,
 914                                            &mod_lo);
 915       if (query) {
 916          modifier = combine_u32_into_u64(mod_hi, mod_lo);
 917       }
 918    }
 919
 920    if (dri2_dpy->wl_dmabuf && modifier != DRM_FORMAT_MOD_INVALID) {
 921       struct zwp_linux_buffer_params_v1 *params;
 922       int i;
 923
 924       /* We don't need a wrapper for wl_dmabuf objects, because we have to
 925        * create the intermediate params object; we can set the queue on this,
 926        * and the wl_buffer inherits it race-free. */
 927       params = zwp_linux_dmabuf_v1_create_params(dri2_dpy->wl_dmabuf);
 928       if (dri2_surf)
 929          wl_proxy_set_queue((struct wl_proxy *) params, dri2_surf->wl_queue);
 930
 931       for (i = 0; i < num_planes; i++) {
 932          __DRIimage *p_image;
 933          int stride, offset;
 934          int fd = -1;
 935
 936          p_image = dri2_dpy->image->fromPlanar(image, i, NULL);
 937          if (!p_image) {
 938             assert(i == 0);
 939             p_image = image;
 940          }
 941
 942          query = dri2_dpy->image->queryImage(p_image,
 943                                              __DRI_IMAGE_ATTRIB_FD,
 944                                              &fd);
 945          query &= dri2_dpy->image->queryImage(p_image,
 946                                               __DRI_IMAGE_ATTRIB_STRIDE,
 947                                               &stride);
 948          query &= dri2_dpy->image->queryImage(p_image,
 949                                               __DRI_IMAGE_ATTRIB_OFFSET,
 950                                               &offset);
 951          if (image != p_image)
 952             dri2_dpy->image->destroyImage(p_image);
 953
 954          if (!query) {
 955             if (fd >= 0)
 956                close(fd);
 957             zwp_linux_buffer_params_v1_destroy(params);
 958             return NULL;
 959          }
 960
 961          zwp_linux_buffer_params_v1_add(params, fd, i, offset, stride,
 962                                         modifier >> 32, modifier & 0xffffffff);
 963          close(fd);
 964       }
 965
 966       ret = zwp_linux_buffer_params_v1_create_immed(params, width, height,
 967                                                     fourcc, 0);
 968       zwp_linux_buffer_params_v1_destroy(params);
 969    } else if (dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME) {
 970       struct wl_drm *wl_drm =
 971          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 972       int fd, stride;
 973
 974       if (num_planes > 1)
 975          return NULL;
 976
 977       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &fd);
 978       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 979       ret = wl_drm_create_prime_buffer(wl_drm, fd, width, height, fourcc, 0,
 980                                        stride, 0, 0, 0, 0);
 981       close(fd);
 982    } else {
 983       struct wl_drm *wl_drm =
 984          dri2_surf ? dri2_surf->wl_drm_wrapper : dri2_dpy->wl_drm;
 985       int name, stride;
 986
 987       if (num_planes > 1)
 988          return NULL;
 989
 990       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_NAME, &name);
 991       dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride);
 992       ret = wl_drm_create_buffer(wl_drm, name, width, height, stride, fourcc);
 993    }
 994
 995    return ret;
 996 }
 997
 998 static EGLBoolean
 999 try_damage_buffer(struct dri2_egl_surface *dri2_surf,
1000                   const EGLint *rects,
1001                   EGLint n_rects)
1002 {
1003    if (wl_proxy_get_version((struct wl_proxy *) dri2_surf->wl_surface_wrapper)
1004        < WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION)
1005       return EGL_FALSE;
1006
1007    for (int i = 0; i < n_rects; i++) {
1008       const int *rect = &rects[i * 4];
1009
1010       wl_surface_damage_buffer(dri2_surf->wl_surface_wrapper,
1011                                rect[0],
1012                                dri2_surf->base.Height - rect[1] - rect[3],
1013                                rect[2], rect[3]);
1014    }
1015    return EGL_TRUE;
1016 }
1017 /**
1018  * Called via eglSwapBuffers(), drv->API.SwapBuffers().
1019  */
1020 static EGLBoolean
1021 dri2_wl_swap_buffers_with_damage(_EGLDriver *drv,
1022                                  _EGLDisplay *disp,
1023                                  _EGLSurface *draw,
1024                                  const EGLint *rects,
1025                                  EGLint n_rects)
1026 {
1027    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1028    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1029
1030    while (dri2_surf->throttle_callback != NULL)
1031       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1032                                     dri2_surf->wl_queue) == -1)
1033          return -1;
1034
1035    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
1036       if (dri2_surf->color_buffers[i].age > 0)
1037          dri2_surf->color_buffers[i].age++;
1038
1039    /* Make sure we have a back buffer in case we're swapping without ever
1040     * rendering. */
1041    if (update_buffers_if_needed(dri2_surf) < 0)
1042       return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
1043
1044    if (draw->SwapInterval > 0) {
1045       dri2_surf->throttle_callback =
1046          wl_surface_frame(dri2_surf->wl_surface_wrapper);
1047       wl_callback_add_listener(dri2_surf->throttle_callback,
1048                                &throttle_listener, dri2_surf);
1049    }
1050
1051    dri2_surf->back->age = 1;
1052    dri2_surf->current = dri2_surf->back;
1053    dri2_surf->back = NULL;
1054
1055    if (!dri2_surf->current->wl_buffer) {
1056       __DRIimage *image;
1057
1058       if (dri2_dpy->is_different_gpu)
1059          image = dri2_surf->current->linear_copy;
1060       else
1061          image = dri2_surf->current->dri_image;
1062
1063       dri2_surf->current->wl_buffer =
1064          create_wl_buffer(dri2_dpy, dri2_surf, image);
1065
1066       dri2_surf->current->wl_release = false;
1067
1068       wl_buffer_add_listener(dri2_surf->current->wl_buffer,
1069                              &wl_buffer_listener, dri2_surf);
1070    }
1071
1072    wl_surface_attach(dri2_surf->wl_surface_wrapper,
1073                      dri2_surf->current->wl_buffer,
1074                      dri2_surf->dx, dri2_surf->dy);
1075
1076    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1077    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1078    /* reset resize growing parameters */
1079    dri2_surf->dx = 0;
1080    dri2_surf->dy = 0;
1081
1082    /* If the compositor doesn't support damage_buffer, we deliberately
1083     * ignore the damage region and post maximum damage, due to
1084     * https://bugs.freedesktop.org/78190 */
1085    if (!n_rects || !try_damage_buffer(dri2_surf, rects, n_rects))
1086       wl_surface_damage(dri2_surf->wl_surface_wrapper,
1087                         0, 0, INT32_MAX, INT32_MAX);
1088
1089    if (dri2_dpy->is_different_gpu) {
1090       _EGLContext *ctx = _eglGetCurrentContext();
1091       struct dri2_egl_context *dri2_ctx = dri2_egl_context(ctx);
1092       dri2_dpy->image->blitImage(dri2_ctx->dri_context,
1093                                  dri2_surf->current->linear_copy,
1094                                  dri2_surf->current->dri_image,
1095                                  0, 0, dri2_surf->base.Width,
1096                                  dri2_surf->base.Height,
1097                                  0, 0, dri2_surf->base.Width,
1098                                  dri2_surf->base.Height, 0);
1099    }
1100
1101    dri2_flush_drawable_for_swapbuffers(disp, draw);
1102    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
1103
1104    wl_surface_commit(dri2_surf->wl_surface_wrapper);
1105
1106    /* If we're not waiting for a frame callback then we'll at least throttle
1107     * to a sync callback so that we always give a chance for the compositor to
1108     * handle the commit and send a release event before checking for a free
1109     * buffer */
1110    if (dri2_surf->throttle_callback == NULL) {
1111       dri2_surf->throttle_callback = wl_display_sync(dri2_surf->wl_dpy_wrapper);
1112       wl_callback_add_listener(dri2_surf->throttle_callback,
1113                                &throttle_listener, dri2_surf);
1114    }
1115
1116    wl_display_flush(dri2_dpy->wl_dpy);
1117
1118    return EGL_TRUE;
1119 }
1120
1121 static EGLint
1122 dri2_wl_query_buffer_age(_EGLDriver *drv,
1123                          _EGLDisplay *disp, _EGLSurface *surface)
1124 {
1125    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1126
1127    if (update_buffers_if_needed(dri2_surf) < 0) {
1128       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
1129       return -1;
1130    }
1131
1132    return dri2_surf->back->age;
1133 }
1134
1135 static EGLBoolean
1136 dri2_wl_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1137 {
1138    return dri2_wl_swap_buffers_with_damage(drv, disp, draw, NULL, 0);
1139 }
1140
1141 static struct wl_buffer *
1142 dri2_wl_create_wayland_buffer_from_image(_EGLDriver *drv,
1143                                           _EGLDisplay *disp,
1144                                           _EGLImage *img)
1145 {
1146    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1147    struct dri2_egl_image *dri2_img = dri2_egl_image(img);
1148    __DRIimage *image = dri2_img->dri_image;
1149    struct wl_buffer *buffer;
1150    int format, visual_idx;
1151
1152    /* Check the upstream display supports this buffer's format. */
1153    dri2_dpy->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &format);
1154    visual_idx = dri2_wl_visual_idx_from_dri_image_format(format);
1155    if (visual_idx == -1)
1156       goto bad_format;
1157
1158    if (!BITSET_TEST(dri2_dpy->formats, visual_idx))
1159       goto bad_format;
1160
1161    buffer = create_wl_buffer(dri2_dpy, NULL, image);
1162
1163    /* The buffer object will have been created with our internal event queue
1164     * because it is using wl_dmabuf/wl_drm as a proxy factory. We want the
1165     * buffer to be used by the application so we'll reset it to the display's
1166     * default event queue. This isn't actually racy, as the only event the
1167     * buffer can get is a buffer release, which doesn't happen with an explicit
1168     * attach. */
1169    if (buffer)
1170       wl_proxy_set_queue((struct wl_proxy *) buffer, NULL);
1171
1172    return buffer;
1173
1174 bad_format:
1175    _eglError(EGL_BAD_MATCH, "unsupported image format");
1176    return NULL;
1177 }
1178
1179 static int
1180 dri2_wl_authenticate(_EGLDisplay *disp, uint32_t id)
1181 {
1182    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1183    int ret = 0;
1184
1185    if (dri2_dpy->is_render_node) {
1186       _eglLog(_EGL_WARNING, "wayland-egl: client asks server to "
1187                             "authenticate for render-nodes");
1188       return 0;
1189    }
1190    dri2_dpy->authenticated = false;
1191
1192    wl_drm_authenticate(dri2_dpy->wl_drm, id);
1193    if (roundtrip(dri2_dpy) < 0)
1194       ret = -1;
1195
1196    if (!dri2_dpy->authenticated)
1197       ret = -1;
1198
1199    /* reset authenticated */
1200    dri2_dpy->authenticated = true;
1201
1202    return ret;
1203 }
1204
1205 static void
1206 drm_handle_device(void *data, struct wl_drm *drm, const char *device)
1207 {
1208    struct dri2_egl_display *dri2_dpy = data;
1209    drm_magic_t magic;
1210
1211    dri2_dpy->device_name = strdup(device);
1212    if (!dri2_dpy->device_name)
1213       return;
1214
1215    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
1216    if (dri2_dpy->fd == -1) {
1217       _eglLog(_EGL_WARNING, "wayland-egl: could not open %s (%s)",
1218               dri2_dpy->device_name, strerror(errno));
1219       free(dri2_dpy->device_name);
1220       dri2_dpy->device_name = NULL;
1221       return;
1222    }
1223
1224    if (drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER) {
1225       dri2_dpy->authenticated = true;
1226    } else {
1227       if (drmGetMagic(dri2_dpy->fd, &magic)) {
1228          close(dri2_dpy->fd);
1229          dri2_dpy->fd = -1;
1230          free(dri2_dpy->device_name);
1231          dri2_dpy->device_name = NULL;
1232          _eglLog(_EGL_WARNING, "wayland-egl: drmGetMagic failed");
1233          return;
1234       }
1235       wl_drm_authenticate(dri2_dpy->wl_drm, magic);
1236    }
1237 }
1238
1239 static void
1240 drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
1241 {
1242    struct dri2_egl_display *dri2_dpy = data;
1243    int visual_idx = dri2_wl_visual_idx_from_fourcc(format);
1244
1245    if (visual_idx == -1)
1246       return;
1247
1248    BITSET_SET(dri2_dpy->formats, visual_idx);
1249 }
1250
1251 static void
1252 drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
1253 {
1254    struct dri2_egl_display *dri2_dpy = data;
1255
1256    dri2_dpy->capabilities = value;
1257 }
1258
1259 static void
1260 drm_handle_authenticated(void *data, struct wl_drm *drm)
1261 {
1262    struct dri2_egl_display *dri2_dpy = data;
1263
1264    dri2_dpy->authenticated = true;
1265 }
1266
1267 static const struct wl_drm_listener drm_listener = {
1268    .device = drm_handle_device,
1269    .format = drm_handle_format,
1270    .authenticated = drm_handle_authenticated,
1271    .capabilities = drm_handle_capabilities
1272 };
1273
1274 static void
1275 dmabuf_ignore_format(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1276                      uint32_t format)
1277 {
1278    /* formats are implicitly advertised by the 'modifier' event, so ignore */
1279 }
1280
1281 static void
1282 dmabuf_handle_modifier(void *data, struct zwp_linux_dmabuf_v1 *dmabuf,
1283                        uint32_t format, uint32_t modifier_hi,
1284                        uint32_t modifier_lo)
1285 {
1286    struct dri2_egl_display *dri2_dpy = data;
1287    int visual_idx = dri2_wl_visual_idx_from_fourcc(format);
1288    uint64_t *mod;
1289
1290    if (visual_idx == -1)
1291       return;
1292
1293    if (modifier_hi == (DRM_FORMAT_MOD_INVALID >> 32) &&
1294        modifier_lo == (DRM_FORMAT_MOD_INVALID & 0xffffffff))
1295       return;
1296
1297    BITSET_SET(dri2_dpy->formats, visual_idx);
1298
1299    mod = u_vector_add(&dri2_dpy->wl_modifiers[visual_idx]);
1300    *mod = combine_u32_into_u64(modifier_hi, modifier_lo);
1301 }
1302
1303 static const struct zwp_linux_dmabuf_v1_listener dmabuf_listener = {
1304    .format = dmabuf_ignore_format,
1305    .modifier = dmabuf_handle_modifier,
1306 };
1307
1308 static void
1309 registry_handle_global_drm(void *data, struct wl_registry *registry,
1310                            uint32_t name, const char *interface,
1311                            uint32_t version)
1312 {
1313    struct dri2_egl_display *dri2_dpy = data;
1314
1315    if (strcmp(interface, "wl_drm") == 0) {
1316       dri2_dpy->wl_drm =
1317          wl_registry_bind(registry, name, &wl_drm_interface, MIN2(version, 2));
1318       wl_drm_add_listener(dri2_dpy->wl_drm, &drm_listener, dri2_dpy);
1319    } else if (strcmp(interface, "zwp_linux_dmabuf_v1") == 0 && version >= 3) {
1320       dri2_dpy->wl_dmabuf =
1321          wl_registry_bind(registry, name, &zwp_linux_dmabuf_v1_interface,
1322                           MIN2(version, 3));
1323       zwp_linux_dmabuf_v1_add_listener(dri2_dpy->wl_dmabuf, &dmabuf_listener,
1324                                        dri2_dpy);
1325    }
1326 }
1327
1328 static void
1329 registry_handle_global_remove(void *data, struct wl_registry *registry,
1330                               uint32_t name)
1331 {
1332 }
1333
1334 static const struct wl_registry_listener registry_listener_drm = {
1335    .global = registry_handle_global_drm,
1336    .global_remove = registry_handle_global_remove
1337 };
1338
1339 static void
1340 dri2_wl_setup_swap_interval(_EGLDisplay *disp)
1341 {
1342    /* We can't use values greater than 1 on Wayland because we are using the
1343     * frame callback to synchronise the frame and the only way we be sure to
1344     * get a frame callback is to attach a new buffer. Therefore we can't just
1345     * sit drawing nothing to wait until the next ‘n’ frame callbacks */
1346
1347    dri2_setup_swap_interval(disp, 1);
1348 }
1349
1350 static const struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
1351    .authenticate = dri2_wl_authenticate,
1352    .create_window_surface = dri2_wl_create_window_surface,
1353    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1354    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1355    .destroy_surface = dri2_wl_destroy_surface,
1356    .create_image = dri2_create_image_khr,
1357    .swap_buffers = dri2_wl_swap_buffers,
1358    .swap_buffers_with_damage = dri2_wl_swap_buffers_with_damage,
1359    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1360    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1361    .copy_buffers = dri2_fallback_copy_buffers,
1362    .query_buffer_age = dri2_wl_query_buffer_age,
1363    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
1364    .get_sync_values = dri2_fallback_get_sync_values,
1365    .get_dri_drawable = dri2_surface_get_dri_drawable,
1366 };
1367
1368 static const __DRIextension *dri2_loader_extensions[] = {
1369    &dri2_loader_extension.base,
1370    &image_loader_extension.base,
1371    &image_lookup_extension.base,
1372    &use_invalidate.base,
1373    NULL,
1374 };
1375
1376 static const __DRIextension *image_loader_extensions[] = {
1377    &image_loader_extension.base,
1378    &image_lookup_extension.base,
1379    &use_invalidate.base,
1380    NULL,
1381 };
1382
1383 static EGLBoolean
1384 dri2_wl_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
1385 {
1386    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1387    unsigned int format_count[ARRAY_SIZE(dri2_wl_visuals)] = { 0 };
1388    unsigned int count = 0;
1389    bool assigned;
1390
1391    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
1392       assigned = false;
1393
1394       for (unsigned j = 0; j < ARRAY_SIZE(dri2_wl_visuals); j++) {
1395          struct dri2_egl_config *dri2_conf;
1396
1397          if (!BITSET_TEST(dri2_dpy->formats, j))
1398             continue;
1399
1400          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1401                count + 1, EGL_WINDOW_BIT, NULL, dri2_wl_visuals[j].rgba_shifts, dri2_wl_visuals[j].rgba_sizes);
1402          if (dri2_conf) {
1403             if (dri2_conf->base.ConfigID == count + 1)
1404                count++;
1405             format_count[j]++;
1406             assigned = true;
1407          }
1408       }
1409
1410       if (!assigned && dri2_dpy->is_different_gpu) {
1411          struct dri2_egl_config *dri2_conf;
1412          int alt_dri_image_format, c, s;
1413
1414          /* No match for config. Try if we can blitImage convert to a visual */
1415          c = dri2_wl_visual_idx_from_config(dri2_dpy,
1416                                             dri2_dpy->driver_configs[i]);
1417
1418          if (c == -1)
1419             continue;
1420
1421          /* Find optimal target visual for blitImage conversion, if any. */
1422          alt_dri_image_format = dri2_wl_visuals[c].alt_dri_image_format;
1423          s = dri2_wl_visual_idx_from_dri_image_format(alt_dri_image_format);
1424
1425          if (s == -1 || !BITSET_TEST(dri2_dpy->formats, s))
1426             continue;
1427
1428          /* Visual s works for the Wayland server, and c can be converted into s
1429           * by our client gpu during PRIME blitImage conversion to a linear
1430           * wl_buffer, so add visual c as supported by the client renderer.
1431           */
1432          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
1433                                      count + 1, EGL_WINDOW_BIT, NULL,
1434                                      dri2_wl_visuals[c].rgba_shifts,
1435                                      dri2_wl_visuals[c].rgba_sizes);
1436          if (dri2_conf) {
1437             if (dri2_conf->base.ConfigID == count + 1)
1438                count++;
1439             format_count[c]++;
1440             if (format_count[c] == 1)
1441                _eglLog(_EGL_DEBUG, "Client format %s to server format %s via "
1442                        "PRIME blitImage.", dri2_wl_visuals[c].format_name,
1443                        dri2_wl_visuals[s].format_name);
1444          }
1445       }
1446    }
1447
1448    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
1449       if (!format_count[i]) {
1450          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
1451                  dri2_wl_visuals[i].format_name);
1452       }
1453    }
1454
1455    return (count != 0);
1456 }
1457
1458 static EGLBoolean
1459 dri2_initialize_wayland_drm(_EGLDriver *drv, _EGLDisplay *disp)
1460 {
1461    _EGLDevice *dev;
1462    struct dri2_egl_display *dri2_dpy;
1463
1464    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1465    if (!dri2_dpy)
1466       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1467
1468    dri2_dpy->fd = -1;
1469    disp->DriverData = (void *) dri2_dpy;
1470    if (disp->PlatformDisplay == NULL) {
1471       dri2_dpy->wl_dpy = wl_display_connect(NULL);
1472       if (dri2_dpy->wl_dpy == NULL)
1473          goto cleanup;
1474       dri2_dpy->own_device = true;
1475    } else {
1476       dri2_dpy->wl_dpy = disp->PlatformDisplay;
1477    }
1478
1479    dri2_dpy->wl_modifiers =
1480       calloc(ARRAY_SIZE(dri2_wl_visuals), sizeof(*dri2_dpy->wl_modifiers));
1481    if (!dri2_dpy->wl_modifiers)
1482       goto cleanup;
1483    for (int i = 0; i < ARRAY_SIZE(dri2_wl_visuals); i++) {
1484       if (!u_vector_init(&dri2_dpy->wl_modifiers[i], sizeof(uint64_t), 32))
1485          goto cleanup;
1486    }
1487
1488    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
1489
1490    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
1491    if (dri2_dpy->wl_dpy_wrapper == NULL)
1492       goto cleanup;
1493
1494    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
1495                       dri2_dpy->wl_queue);
1496
1497    if (dri2_dpy->own_device)
1498       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
1499
1500    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
1501    wl_registry_add_listener(dri2_dpy->wl_registry,
1502                             &registry_listener_drm, dri2_dpy);
1503    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_drm == NULL)
1504       goto cleanup;
1505
1506    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->fd == -1)
1507       goto cleanup;
1508
1509    if (roundtrip(dri2_dpy) < 0 || !dri2_dpy->authenticated)
1510       goto cleanup;
1511
1512    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd,
1513                                                &dri2_dpy->is_different_gpu);
1514    dev = _eglAddDevice(dri2_dpy->fd, false);
1515    if (!dev) {
1516       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1517       goto cleanup;
1518    }
1519
1520    disp->Device = dev;
1521
1522    if (dri2_dpy->is_different_gpu) {
1523       free(dri2_dpy->device_name);
1524       dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
1525       if (!dri2_dpy->device_name) {
1526          _eglError(EGL_BAD_ALLOC, "wayland-egl: failed to get device name "
1527                                   "for requested GPU");
1528          goto cleanup;
1529       }
1530    }
1531
1532    /* we have to do the check now, because loader_get_user_preferred_fd
1533     * will return a render-node when the requested gpu is different
1534     * to the server, but also if the client asks for the same gpu than
1535     * the server by requesting its pci-id */
1536    dri2_dpy->is_render_node = drmGetNodeTypeFromFd(dri2_dpy->fd) == DRM_NODE_RENDER;
1537
1538    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
1539    if (dri2_dpy->driver_name == NULL) {
1540       _eglError(EGL_BAD_ALLOC, "DRI2: failed to get driver name");
1541       goto cleanup;
1542    }
1543
1544    /* render nodes cannot use Gem names, and thus do not support
1545     * the __DRI_DRI2_LOADER extension */
1546    if (!dri2_dpy->is_render_node) {
1547       dri2_dpy->loader_extensions = dri2_loader_extensions;
1548       if (!dri2_load_driver(disp)) {
1549          _eglError(EGL_BAD_ALLOC, "DRI2: failed to load driver");
1550          goto cleanup;
1551       }
1552    } else {
1553       dri2_dpy->loader_extensions = image_loader_extensions;
1554       if (!dri2_load_driver_dri3(disp)) {
1555          _eglError(EGL_BAD_ALLOC, "DRI3: failed to load driver");
1556          goto cleanup;
1557       }
1558    }
1559
1560    if (!dri2_create_screen(disp))
1561       goto cleanup;
1562
1563    if (!dri2_setup_extensions(disp))
1564       goto cleanup;
1565
1566    dri2_setup_screen(disp);
1567
1568    dri2_wl_setup_swap_interval(disp);
1569
1570    /* To use Prime, we must have _DRI_IMAGE v7 at least.
1571     * createImageFromFds support indicates that Prime export/import
1572     * is supported by the driver. Fall back to
1573     * gem names if we don't have Prime support. */
1574
1575    if (dri2_dpy->image->base.version < 7 ||
1576        dri2_dpy->image->createImageFromFds == NULL)
1577       dri2_dpy->capabilities &= ~WL_DRM_CAPABILITY_PRIME;
1578
1579    /* We cannot use Gem names with render-nodes, only prime fds (dma-buf).
1580     * The server needs to accept them */
1581    if (dri2_dpy->is_render_node &&
1582        !(dri2_dpy->capabilities & WL_DRM_CAPABILITY_PRIME)) {
1583       _eglLog(_EGL_WARNING, "wayland-egl: display is not render-node capable");
1584       goto cleanup;
1585    }
1586
1587    if (dri2_dpy->is_different_gpu &&
1588        (dri2_dpy->image->base.version < 9 ||
1589         dri2_dpy->image->blitImage == NULL)) {
1590       _eglLog(_EGL_WARNING, "wayland-egl: Different GPU selected, but the "
1591                             "Image extension in the driver is not "
1592                             "compatible. Version 9 or later and blitImage() "
1593                             "are required");
1594       goto cleanup;
1595    }
1596
1597    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
1598       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
1599       goto cleanup;
1600    }
1601
1602    dri2_set_WL_bind_wayland_display(drv, disp);
1603    /* When cannot convert EGLImage to wl_buffer when on a different gpu,
1604     * because the buffer of the EGLImage has likely a tiling mode the server
1605     * gpu won't support. These is no way to check for now. Thus do not support the
1606     * extension */
1607    if (!dri2_dpy->is_different_gpu)
1608       disp->Extensions.WL_create_wayland_buffer_from_image = EGL_TRUE;
1609
1610    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1611
1612    disp->Extensions.EXT_swap_buffers_with_damage = EGL_TRUE;
1613
1614    /* Fill vtbl last to prevent accidentally calling virtual function during
1615     * initialization.
1616     */
1617    dri2_dpy->vtbl = &dri2_wl_display_vtbl;
1618
1619    return EGL_TRUE;
1620
1621  cleanup:
1622    dri2_display_destroy(disp);
1623    return EGL_FALSE;
1624 }
1625
1626 static int
1627 dri2_wl_swrast_get_stride_for_format(int format, int w)
1628 {
1629    int visual_idx = dri2_wl_visual_idx_from_shm_format(format);
1630
1631    assume(visual_idx != -1);
1632
1633    return w * (dri2_wl_visuals[visual_idx].bpp / 8);
1634 }
1635
1636 static EGLBoolean
1637 dri2_wl_swrast_allocate_buffer(struct dri2_egl_surface *dri2_surf,
1638                                int format, int w, int h,
1639                                void **data, int *size,
1640                                struct wl_buffer **buffer)
1641 {
1642    struct dri2_egl_display *dri2_dpy =
1643       dri2_egl_display(dri2_surf->base.Resource.Display);
1644    struct wl_shm_pool *pool;
1645    int fd, stride, size_map;
1646    void *data_map;
1647
1648    stride = dri2_wl_swrast_get_stride_for_format(format, w);
1649    size_map = h * stride;
1650
1651    /* Create a shareable buffer */
1652    fd = os_create_anonymous_file(size_map, NULL);
1653    if (fd < 0)
1654       return EGL_FALSE;
1655
1656    data_map = mmap(NULL, size_map, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1657    if (data_map == MAP_FAILED) {
1658       close(fd);
1659       return EGL_FALSE;
1660    }
1661
1662    /* Share it in a wl_buffer */
1663    pool = wl_shm_create_pool(dri2_dpy->wl_shm, fd, size_map);
1664    wl_proxy_set_queue((struct wl_proxy *)pool, dri2_surf->wl_queue);
1665    *buffer = wl_shm_pool_create_buffer(pool, 0, w, h, stride, format);
1666    wl_shm_pool_destroy(pool);
1667    close(fd);
1668
1669    *data = data_map;
1670    *size = size_map;
1671    return EGL_TRUE;
1672 }
1673
1674 static int
1675 swrast_update_buffers(struct dri2_egl_surface *dri2_surf)
1676 {
1677    struct dri2_egl_display *dri2_dpy =
1678       dri2_egl_display(dri2_surf->base.Resource.Display);
1679
1680    /* we need to do the following operations only once per frame */
1681    if (dri2_surf->back)
1682       return 0;
1683
1684    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
1685        dri2_surf->base.Height != dri2_surf->wl_win->height) {
1686
1687       dri2_wl_release_buffers(dri2_surf);
1688
1689       dri2_surf->base.Width  = dri2_surf->wl_win->width;
1690       dri2_surf->base.Height = dri2_surf->wl_win->height;
1691       dri2_surf->dx = dri2_surf->wl_win->dx;
1692       dri2_surf->dy = dri2_surf->wl_win->dy;
1693       dri2_surf->current = NULL;
1694    }
1695
1696    /* find back buffer */
1697
1698    /* There might be a buffer release already queued that wasn't processed */
1699    wl_display_dispatch_queue_pending(dri2_dpy->wl_dpy, dri2_surf->wl_queue);
1700
1701    /* try get free buffer already created */
1702    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1703       if (!dri2_surf->color_buffers[i].locked &&
1704           dri2_surf->color_buffers[i].wl_buffer) {
1705           dri2_surf->back = &dri2_surf->color_buffers[i];
1706           break;
1707       }
1708    }
1709
1710    /* else choose any another free location */
1711    if (!dri2_surf->back) {
1712       for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1713          if (!dri2_surf->color_buffers[i].locked) {
1714              dri2_surf->back = &dri2_surf->color_buffers[i];
1715              if (!dri2_wl_swrast_allocate_buffer(dri2_surf,
1716                                                  dri2_surf->format,
1717                                                  dri2_surf->base.Width,
1718                                                  dri2_surf->base.Height,
1719                                                  &dri2_surf->back->data,
1720                                                  &dri2_surf->back->data_size,
1721                                                  &dri2_surf->back->wl_buffer)) {
1722                 _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
1723                  return -1;
1724              }
1725              wl_buffer_add_listener(dri2_surf->back->wl_buffer,
1726                                     &wl_buffer_listener, dri2_surf);
1727              break;
1728          }
1729       }
1730    }
1731
1732    if (!dri2_surf->back) {
1733       _eglError(EGL_BAD_ALLOC, "failed to find free buffer");
1734       return -1;
1735    }
1736
1737    dri2_surf->back->locked = true;
1738
1739    /* If we have an extra unlocked buffer at this point, we had to do triple
1740     * buffering for a while, but now can go back to just double buffering.
1741     * That means we can free any unlocked buffer now. */
1742    for (int i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
1743       if (!dri2_surf->color_buffers[i].locked &&
1744           dri2_surf->color_buffers[i].wl_buffer) {
1745          wl_buffer_destroy(dri2_surf->color_buffers[i].wl_buffer);
1746          munmap(dri2_surf->color_buffers[i].data,
1747                 dri2_surf->color_buffers[i].data_size);
1748          dri2_surf->color_buffers[i].wl_buffer = NULL;
1749          dri2_surf->color_buffers[i].data = NULL;
1750       }
1751    }
1752
1753    return 0;
1754 }
1755
1756 static void*
1757 dri2_wl_swrast_get_frontbuffer_data(struct dri2_egl_surface *dri2_surf)
1758 {
1759    /* if there has been a resize: */
1760    if (!dri2_surf->current)
1761       return NULL;
1762
1763    return dri2_surf->current->data;
1764 }
1765
1766 static void*
1767 dri2_wl_swrast_get_backbuffer_data(struct dri2_egl_surface *dri2_surf)
1768 {
1769    assert(dri2_surf->back);
1770    return dri2_surf->back->data;
1771 }
1772
1773 static void
1774 dri2_wl_swrast_commit_backbuffer(struct dri2_egl_surface *dri2_surf)
1775 {
1776    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
1777
1778    while (dri2_surf->throttle_callback != NULL)
1779       if (wl_display_dispatch_queue(dri2_dpy->wl_dpy,
1780                                     dri2_surf->wl_queue) == -1)
1781          return;
1782
1783    if (dri2_surf->base.SwapInterval > 0) {
1784       dri2_surf->throttle_callback =
1785          wl_surface_frame(dri2_surf->wl_surface_wrapper);
1786       wl_callback_add_listener(dri2_surf->throttle_callback,
1787                                &throttle_listener, dri2_surf);
1788    }
1789
1790    dri2_surf->current = dri2_surf->back;
1791    dri2_surf->back = NULL;
1792
1793    wl_surface_attach(dri2_surf->wl_surface_wrapper,
1794                      dri2_surf->current->wl_buffer,
1795                      dri2_surf->dx, dri2_surf->dy);
1796
1797    dri2_surf->wl_win->attached_width  = dri2_surf->base.Width;
1798    dri2_surf->wl_win->attached_height = dri2_surf->base.Height;
1799    /* reset resize growing parameters */
1800    dri2_surf->dx = 0;
1801    dri2_surf->dy = 0;
1802
1803    wl_surface_damage(dri2_surf->wl_surface_wrapper,
1804                      0, 0, INT32_MAX, INT32_MAX);
1805    wl_surface_commit(dri2_surf->wl_surface_wrapper);
1806
1807    /* If we're not waiting for a frame callback then we'll at least throttle
1808     * to a sync callback so that we always give a chance for the compositor to
1809     * handle the commit and send a release event before checking for a free
1810     * buffer */
1811    if (dri2_surf->throttle_callback == NULL) {
1812       dri2_surf->throttle_callback = wl_display_sync(dri2_surf->wl_dpy_wrapper);
1813       wl_callback_add_listener(dri2_surf->throttle_callback,
1814                                &throttle_listener, dri2_surf);
1815    }
1816
1817    wl_display_flush(dri2_dpy->wl_dpy);
1818 }
1819
1820 static void
1821 dri2_wl_swrast_get_drawable_info(__DRIdrawable * draw,
1822                                  int *x, int *y, int *w, int *h,
1823                                  void *loaderPrivate)
1824 {
1825    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1826
1827    (void) swrast_update_buffers(dri2_surf);
1828    *x = 0;
1829    *y = 0;
1830    *w = dri2_surf->base.Width;
1831    *h = dri2_surf->base.Height;
1832 }
1833
1834 static void
1835 dri2_wl_swrast_get_image(__DRIdrawable * read,
1836                          int x, int y, int w, int h,
1837                          char *data, void *loaderPrivate)
1838 {
1839    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1840    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1841    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1842    int src_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1843    int dst_stride = copy_width;
1844    char *src, *dst;
1845
1846    src = dri2_wl_swrast_get_frontbuffer_data(dri2_surf);
1847    if (!src) {
1848       memset(data, 0, copy_width * h);
1849       return;
1850    }
1851
1852    assert(data != src);
1853    assert(copy_width <= src_stride);
1854
1855    src += x_offset;
1856    src += y * src_stride;
1857    dst = data;
1858
1859    if (copy_width > src_stride-x_offset)
1860       copy_width = src_stride-x_offset;
1861    if (h > dri2_surf->base.Height-y)
1862       h = dri2_surf->base.Height-y;
1863
1864    for (; h>0; h--) {
1865       memcpy(dst, src, copy_width);
1866       src += src_stride;
1867       dst += dst_stride;
1868    }
1869 }
1870
1871 static void
1872 dri2_wl_swrast_put_image2(__DRIdrawable * draw, int op,
1873                          int x, int y, int w, int h, int stride,
1874                          char *data, void *loaderPrivate)
1875 {
1876    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1877    int copy_width = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1878    int dst_stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, dri2_surf->base.Width);
1879    int x_offset = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, x);
1880    char *src, *dst;
1881
1882    assert(copy_width <= stride);
1883
1884    (void) swrast_update_buffers(dri2_surf);
1885    dst = dri2_wl_swrast_get_backbuffer_data(dri2_surf);
1886
1887    /* partial copy, copy old content */
1888    if (copy_width < dst_stride)
1889       dri2_wl_swrast_get_image(draw, 0, 0,
1890                                dri2_surf->base.Width, dri2_surf->base.Height,
1891                                dst, loaderPrivate);
1892
1893    dst += x_offset;
1894    dst += y * dst_stride;
1895
1896    src = data;
1897
1898    /* drivers expect we do these checks (and some rely on it) */
1899    if (copy_width > dst_stride-x_offset)
1900       copy_width = dst_stride-x_offset;
1901    if (h > dri2_surf->base.Height-y)
1902       h = dri2_surf->base.Height-y;
1903
1904    for (; h>0; h--) {
1905       memcpy(dst, src, copy_width);
1906       src += stride;
1907       dst += dst_stride;
1908    }
1909    dri2_wl_swrast_commit_backbuffer(dri2_surf);
1910 }
1911
1912 static void
1913 dri2_wl_swrast_put_image(__DRIdrawable * draw, int op,
1914                          int x, int y, int w, int h,
1915                          char *data, void *loaderPrivate)
1916 {
1917    struct dri2_egl_surface *dri2_surf = loaderPrivate;
1918    int stride;
1919
1920    stride = dri2_wl_swrast_get_stride_for_format(dri2_surf->format, w);
1921    dri2_wl_swrast_put_image2(draw, op, x, y, w, h,
1922                              stride, data, loaderPrivate);
1923 }
1924
1925 static EGLBoolean
1926 dri2_wl_swrast_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
1927 {
1928    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1929    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
1930
1931    dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
1932    return EGL_TRUE;
1933 }
1934
1935 static void
1936 shm_handle_format(void *data, struct wl_shm *shm, uint32_t format)
1937 {
1938    struct dri2_egl_display *dri2_dpy = data;
1939    int visual_idx = dri2_wl_visual_idx_from_shm_format(format);
1940
1941    if (visual_idx == -1)
1942       return;
1943
1944    BITSET_SET(dri2_dpy->formats, visual_idx);
1945 }
1946
1947 static const struct wl_shm_listener shm_listener = {
1948    .format = shm_handle_format
1949 };
1950
1951 static void
1952 registry_handle_global_swrast(void *data, struct wl_registry *registry,
1953                               uint32_t name, const char *interface,
1954                               uint32_t version)
1955 {
1956    struct dri2_egl_display *dri2_dpy = data;
1957
1958    if (strcmp(interface, "wl_shm") == 0) {
1959       dri2_dpy->wl_shm =
1960          wl_registry_bind(registry, name, &wl_shm_interface, 1);
1961       wl_shm_add_listener(dri2_dpy->wl_shm, &shm_listener, dri2_dpy);
1962    }
1963 }
1964
1965 static const struct wl_registry_listener registry_listener_swrast = {
1966    .global = registry_handle_global_swrast,
1967    .global_remove = registry_handle_global_remove
1968 };
1969
1970 static const struct dri2_egl_display_vtbl dri2_wl_swrast_display_vtbl = {
1971    .authenticate = NULL,
1972    .create_window_surface = dri2_wl_create_window_surface,
1973    .create_pixmap_surface = dri2_wl_create_pixmap_surface,
1974    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
1975    .destroy_surface = dri2_wl_destroy_surface,
1976    .create_image = dri2_create_image_khr,
1977    .swap_buffers = dri2_wl_swrast_swap_buffers,
1978    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1979    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1980    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1981    .copy_buffers = dri2_fallback_copy_buffers,
1982    .query_buffer_age = dri2_fallback_query_buffer_age,
1983    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1984    .get_sync_values = dri2_fallback_get_sync_values,
1985    .get_dri_drawable = dri2_surface_get_dri_drawable,
1986 };
1987
1988 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1989    .base = { __DRI_SWRAST_LOADER, 2 },
1990
1991    .getDrawableInfo = dri2_wl_swrast_get_drawable_info,
1992    .putImage        = dri2_wl_swrast_put_image,
1993    .getImage        = dri2_wl_swrast_get_image,
1994    .putImage2       = dri2_wl_swrast_put_image2,
1995 };
1996
1997 static const __DRIextension *swrast_loader_extensions[] = {
1998    &swrast_loader_extension.base,
1999    &image_lookup_extension.base,
2000    NULL,
2001 };
2002
2003 static EGLBoolean
2004 dri2_initialize_wayland_swrast(_EGLDriver *drv, _EGLDisplay *disp)
2005 {
2006    _EGLDevice *dev;
2007    struct dri2_egl_display *dri2_dpy;
2008
2009    dri2_dpy = calloc(1, sizeof *dri2_dpy);
2010    if (!dri2_dpy)
2011       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
2012
2013    dri2_dpy->fd = -1;
2014    disp->DriverData = (void *) dri2_dpy;
2015    if (disp->PlatformDisplay == NULL) {
2016       dri2_dpy->wl_dpy = wl_display_connect(NULL);
2017       if (dri2_dpy->wl_dpy == NULL)
2018          goto cleanup;
2019       dri2_dpy->own_device = true;
2020    } else {
2021       dri2_dpy->wl_dpy = disp->PlatformDisplay;
2022    }
2023
2024    dev = _eglAddDevice(dri2_dpy->fd, true);
2025    if (!dev) {
2026       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
2027       goto cleanup;
2028    }
2029
2030    disp->Device = dev;
2031
2032    dri2_dpy->wl_queue = wl_display_create_queue(dri2_dpy->wl_dpy);
2033
2034    dri2_dpy->wl_dpy_wrapper = wl_proxy_create_wrapper(dri2_dpy->wl_dpy);
2035    if (dri2_dpy->wl_dpy_wrapper == NULL)
2036       goto cleanup;
2037
2038    wl_proxy_set_queue((struct wl_proxy *) dri2_dpy->wl_dpy_wrapper,
2039                       dri2_dpy->wl_queue);
2040
2041    if (dri2_dpy->own_device)
2042       wl_display_dispatch_pending(dri2_dpy->wl_dpy);
2043
2044    dri2_dpy->wl_registry = wl_display_get_registry(dri2_dpy->wl_dpy_wrapper);
2045    wl_registry_add_listener(dri2_dpy->wl_registry,
2046                             &registry_listener_swrast, dri2_dpy);
2047
2048    if (roundtrip(dri2_dpy) < 0 || dri2_dpy->wl_shm == NULL)
2049       goto cleanup;
2050
2051    if (roundtrip(dri2_dpy) < 0 || !BITSET_TEST_RANGE(dri2_dpy->formats,
2052                                                      0, EGL_DRI2_MAX_FORMATS))
2053       goto cleanup;
2054
2055    dri2_dpy->driver_name = strdup("swrast");
2056    if (!dri2_load_driver_swrast(disp))
2057       goto cleanup;
2058
2059    dri2_dpy->loader_extensions = swrast_loader_extensions;
2060
2061    if (!dri2_create_screen(disp))
2062       goto cleanup;
2063
2064    if (!dri2_setup_extensions(disp))
2065       goto cleanup;
2066
2067    dri2_setup_screen(disp);
2068
2069    dri2_wl_setup_swap_interval(disp);
2070
2071    if (!dri2_wl_add_configs_for_visuals(drv, disp)) {
2072       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to add configs");
2073       goto cleanup;
2074    }
2075
2076    /* Fill vtbl last to prevent accidentally calling virtual function during
2077     * initialization.
2078     */
2079    dri2_dpy->vtbl = &dri2_wl_swrast_display_vtbl;
2080
2081    return EGL_TRUE;
2082
2083  cleanup:
2084    dri2_display_destroy(disp);
2085    return EGL_FALSE;
2086 }
2087
2088 EGLBoolean
2089 dri2_initialize_wayland(_EGLDriver *drv, _EGLDisplay *disp)
2090 {
2091    EGLBoolean initialized = EGL_FALSE;
2092
2093    if (!disp->Options.ForceSoftware)
2094       initialized = dri2_initialize_wayland_drm(drv, disp);
2095
2096    if (!initialized)
2097       initialized = dri2_initialize_wayland_swrast(drv, disp);
2098
2099    return initialized;
2100
2101 }
2102
2103 void
2104 dri2_teardown_wayland(struct dri2_egl_display *dri2_dpy)
2105 {
2106    if (dri2_dpy->wl_drm)
2107       wl_drm_destroy(dri2_dpy->wl_drm);
2108    if (dri2_dpy->wl_dmabuf)
2109       zwp_linux_dmabuf_v1_destroy(dri2_dpy->wl_dmabuf);
2110    if (dri2_dpy->wl_shm)
2111       wl_shm_destroy(dri2_dpy->wl_shm);
2112    if (dri2_dpy->wl_registry)
2113       wl_registry_destroy(dri2_dpy->wl_registry);
2114    if (dri2_dpy->wl_queue)
2115       wl_event_queue_destroy(dri2_dpy->wl_queue);
2116    if (dri2_dpy->wl_dpy_wrapper)
2117       wl_proxy_wrapper_destroy(dri2_dpy->wl_dpy_wrapper);
2118
2119    for (int i = 0; dri2_dpy->wl_modifiers && i < ARRAY_SIZE(dri2_wl_visuals); i++)
2120       u_vector_finish(&dri2_dpy->wl_modifiers[i]);
2121    free(dri2_dpy->wl_modifiers);
2122
2123    if (dri2_dpy->own_device)
2124       wl_display_disconnect(dri2_dpy->wl_dpy);
2125 }