src/egl/drivers/dri2/platform_x11_dri3.c

   1 /*
   2  * Copyright © 2015 Boyan Ding
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include <stdbool.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #include <xcb/xcb.h>
  29 #include <xcb/dri3.h>
  30 #include <xcb/present.h>
  31
  32 #include <xf86drm.h>
  33 #include "util/macros.h"
  34
  35 #include "egl_dri2.h"
  36 #include "platform_x11_dri3.h"
  37
  38 #include "loader.h"
  39 #include "loader_dri3_helper.h"
  40
  41 static struct dri3_egl_surface *
  42 loader_drawable_to_egl_surface(struct loader_dri3_drawable *draw) {
  43    size_t offset = offsetof(struct dri3_egl_surface, loader_drawable);
  44    return (struct dri3_egl_surface *)(((void*) draw) - offset);
  45 }
  46
  47 static void
  48 egl_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
  49                            int width, int height)
  50 {
  51    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  52
  53    dri3_surf->surf.base.Width = width;
  54    dri3_surf->surf.base.Height = height;
  55 }
  56
  57 static bool
  58 egl_dri3_in_current_context(struct loader_dri3_drawable *draw)
  59 {
  60    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  61    _EGLContext *ctx = _eglGetCurrentContext();
  62
  63    return ctx->Resource.Display == dri3_surf->surf.base.Resource.Display;
  64 }
  65
  66 static __DRIcontext *
  67 egl_dri3_get_dri_context(struct loader_dri3_drawable *draw)
  68 {
  69    _EGLContext *ctx = _eglGetCurrentContext();
  70    struct dri2_egl_context *dri2_ctx;
  71    if (!ctx)
  72       return NULL;
  73    dri2_ctx = dri2_egl_context(ctx);
  74    return dri2_ctx->dri_context;
  75 }
  76
  77 static __DRIscreen *
  78 egl_dri3_get_dri_screen(void)
  79 {
  80    _EGLContext *ctx = _eglGetCurrentContext();
  81    struct dri2_egl_context *dri2_ctx;
  82    if (!ctx)
  83       return NULL;
  84    dri2_ctx = dri2_egl_context(ctx);
  85    return dri2_egl_display(dri2_ctx->base.Resource.Display)->dri_screen;
  86 }
  87
  88 static void
  89 egl_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
  90 {
  91    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  92    _EGLDisplay *disp = dri3_surf->surf.base.Resource.Display;
  93
  94    dri2_flush_drawable_for_swapbuffers(disp, &dri3_surf->surf.base);
  95 }
  96
  97 static const struct loader_dri3_vtable egl_dri3_vtable = {
  98    .set_drawable_size = egl_dri3_set_drawable_size,
  99    .in_current_context = egl_dri3_in_current_context,
 100    .get_dri_context = egl_dri3_get_dri_context,
 101    .get_dri_screen = egl_dri3_get_dri_screen,
 102    .flush_drawable = egl_dri3_flush_drawable,
 103    .show_fps = NULL,
 104 };
 105
 106 static EGLBoolean
 107 dri3_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 108 {
 109    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 110    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 111    xcb_drawable_t drawable = dri3_surf->loader_drawable.drawable;
 112
 113    (void) drv;
 114
 115    loader_dri3_drawable_fini(&dri3_surf->loader_drawable);
 116
 117    if (surf->Type == EGL_PBUFFER_BIT)
 118       xcb_free_pixmap (dri2_dpy->conn, drawable);
 119
 120    dri2_fini_surface(surf);
 121    free(surf);
 122
 123    return EGL_TRUE;
 124 }
 125
 126 static EGLBoolean
 127 dri3_set_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 128                        EGLint interval)
 129 {
 130    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 131
 132    dri3_surf->surf.base.SwapInterval = interval;
 133    loader_dri3_set_swap_interval(&dri3_surf->loader_drawable, interval);
 134
 135    return EGL_TRUE;
 136 }
 137
 138 static _EGLSurface *
 139 dri3_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 140                     _EGLConfig *conf, void *native_surface,
 141                     const EGLint *attrib_list)
 142 {
 143    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 144    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 145    struct dri3_egl_surface *dri3_surf;
 146    const __DRIconfig *dri_config;
 147    xcb_drawable_t drawable;
 148
 149    (void) drv;
 150
 151    dri3_surf = calloc(1, sizeof *dri3_surf);
 152    if (!dri3_surf) {
 153       _eglError(EGL_BAD_ALLOC, "dri3_create_surface");
 154       return NULL;
 155    }
 156
 157    if (!dri2_init_surface(&dri3_surf->surf.base, disp, type, conf,
 158                           attrib_list, false, native_surface))
 159       goto cleanup_surf;
 160
 161    if (type == EGL_PBUFFER_BIT) {
 162       drawable = xcb_generate_id(dri2_dpy->conn);
 163       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 164                         drawable, dri2_dpy->screen->root,
 165                         dri3_surf->surf.base.Width, dri3_surf->surf.base.Height);
 166    } else {
 167       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 168       drawable = (uintptr_t) native_surface;
 169    }
 170
 171    dri_config = dri2_get_dri_config(dri2_conf, type,
 172                                     dri3_surf->surf.base.GLColorspace);
 173
 174    if (!dri_config) {
 175       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 176       goto cleanup_pixmap;
 177    }
 178
 179    if (loader_dri3_drawable_init(dri2_dpy->conn, drawable,
 180                                  dri2_dpy->dri_screen,
 181                                  dri2_dpy->is_different_gpu,
 182                                  dri2_dpy->multibuffers_available,
 183                                  dri_config,
 184                                  &dri2_dpy->loader_dri3_ext,
 185                                  &egl_dri3_vtable,
 186                                  &dri3_surf->loader_drawable)) {
 187       _eglError(EGL_BAD_ALLOC, "dri3_surface_create");
 188       goto cleanup_pixmap;
 189    }
 190
 191    return &dri3_surf->surf.base;
 192
 193  cleanup_pixmap:
 194    if (type == EGL_PBUFFER_BIT)
 195       xcb_free_pixmap(dri2_dpy->conn, drawable);
 196  cleanup_surf:
 197    free(dri3_surf);
 198
 199    return NULL;
 200 }
 201
 202 static int
 203 dri3_authenticate(_EGLDisplay *disp, uint32_t id)
 204 {
 205 #ifdef HAVE_WAYLAND_PLATFORM
 206    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 207
 208    if (dri2_dpy->device_name) {
 209       _eglLog(_EGL_WARNING,
 210               "Wayland client render node authentication is unnecessary");
 211       return 0;
 212    }
 213
 214    _eglLog(_EGL_WARNING,
 215            "Wayland client primary node authentication isn't supported");
 216 #endif
 217
 218    return -1;
 219 }
 220
 221 /**
 222  * Called via eglCreateWindowSurface(), drv->CreateWindowSurface().
 223  */
 224 static _EGLSurface *
 225 dri3_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 226                            _EGLConfig *conf, void *native_window,
 227                            const EGLint *attrib_list)
 228 {
 229    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 230    _EGLSurface *surf;
 231
 232    surf = dri3_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 233                               native_window, attrib_list);
 234    if (surf != NULL)
 235       dri3_set_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 236
 237    return surf;
 238 }
 239
 240 static _EGLSurface *
 241 dri3_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 242                            _EGLConfig *conf, void *native_pixmap,
 243                            const EGLint *attrib_list)
 244 {
 245    return dri3_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 246                               native_pixmap, attrib_list);
 247 }
 248
 249 static _EGLSurface *
 250 dri3_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 251                                 _EGLConfig *conf, const EGLint *attrib_list)
 252 {
 253    return dri3_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 254                               NULL, attrib_list);
 255 }
 256
 257 static EGLBoolean
 258 dri3_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
 259                      EGLuint64KHR *ust, EGLuint64KHR *msc,
 260                      EGLuint64KHR *sbc)
 261 {
 262    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surface);
 263
 264    return loader_dri3_wait_for_msc(&dri3_surf->loader_drawable, 0, 0, 0,
 265                                    (int64_t *) ust, (int64_t *) msc,
 266                                    (int64_t *) sbc) ? EGL_TRUE : EGL_FALSE;
 267 }
 268
 269 static _EGLImage *
 270 dri3_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 271                              EGLClientBuffer buffer, const EGLint *attr_list)
 272 {
 273    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 274    struct dri2_egl_image *dri2_img;
 275    xcb_drawable_t drawable;
 276    xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie;
 277    xcb_dri3_buffer_from_pixmap_reply_t  *bp_reply;
 278    unsigned int format;
 279
 280    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 281    bp_cookie = xcb_dri3_buffer_from_pixmap(dri2_dpy->conn, drawable);
 282    bp_reply = xcb_dri3_buffer_from_pixmap_reply(dri2_dpy->conn,
 283                                                 bp_cookie, NULL);
 284    if (!bp_reply) {
 285       _eglError(EGL_BAD_ALLOC, "xcb_dri3_buffer_from_pixmap");
 286       return NULL;
 287    }
 288
 289    format = dri2_format_for_depth(dri2_dpy, bp_reply->depth);
 290    if (format == __DRI_IMAGE_FORMAT_NONE) {
 291       _eglError(EGL_BAD_PARAMETER,
 292                 "dri3_create_image_khr: unsupported pixmap depth");
 293       free(bp_reply);
 294       return EGL_NO_IMAGE_KHR;
 295    }
 296
 297    dri2_img = malloc(sizeof *dri2_img);
 298    if (!dri2_img) {
 299       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 300       free(bp_reply);
 301       return EGL_NO_IMAGE_KHR;
 302    }
 303
 304    _eglInitImage(&dri2_img->base, disp);
 305
 306    dri2_img->dri_image = loader_dri3_create_image(dri2_dpy->conn,
 307                                                   bp_reply,
 308                                                   format,
 309                                                   dri2_dpy->dri_screen,
 310                                                   dri2_dpy->image,
 311                                                   dri2_img);
 312
 313    free(bp_reply);
 314
 315    return &dri2_img->base;
 316 }
 317
 318 #ifdef HAVE_DRI3_MODIFIERS
 319 static _EGLImage *
 320 dri3_create_image_khr_pixmap_from_buffers(_EGLDisplay *disp, _EGLContext *ctx,
 321                                           EGLClientBuffer buffer,
 322                                           const EGLint *attr_list)
 323 {
 324    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 325    struct dri2_egl_image *dri2_img;
 326    xcb_dri3_buffers_from_pixmap_cookie_t bp_cookie;
 327    xcb_dri3_buffers_from_pixmap_reply_t  *bp_reply;
 328    xcb_drawable_t drawable;
 329    unsigned int format;
 330
 331    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 332    bp_cookie = xcb_dri3_buffers_from_pixmap(dri2_dpy->conn, drawable);
 333    bp_reply = xcb_dri3_buffers_from_pixmap_reply(dri2_dpy->conn,
 334                                                  bp_cookie, NULL);
 335
 336    if (!bp_reply) {
 337       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 338       return EGL_NO_IMAGE_KHR;
 339    }
 340
 341    format = dri2_format_for_depth(dri2_dpy, bp_reply->depth);
 342    if (format == __DRI_IMAGE_FORMAT_NONE) {
 343       _eglError(EGL_BAD_PARAMETER,
 344                 "dri3_create_image_khr: unsupported pixmap depth");
 345       free(bp_reply);
 346       return EGL_NO_IMAGE_KHR;
 347    }
 348
 349    dri2_img = malloc(sizeof *dri2_img);
 350    if (!dri2_img) {
 351       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 352       free(bp_reply);
 353       return EGL_NO_IMAGE_KHR;
 354    }
 355
 356    _eglInitImage(&dri2_img->base, disp);
 357
 358    dri2_img->dri_image = loader_dri3_create_image_from_buffers(dri2_dpy->conn,
 359                                                                bp_reply,
 360                                                                format,
 361                                                                dri2_dpy->dri_screen,
 362                                                                dri2_dpy->image,
 363                                                                dri2_img);
 364    free(bp_reply);
 365
 366    if (!dri2_img->dri_image) {
 367       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 368       free(dri2_img);
 369       return EGL_NO_IMAGE_KHR;
 370    }
 371
 372    return &dri2_img->base;
 373 }
 374 #endif
 375
 376 static _EGLImage *
 377 dri3_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 378                       _EGLContext *ctx, EGLenum target,
 379                       EGLClientBuffer buffer, const EGLint *attr_list)
 380 {
 381 #ifdef HAVE_DRI3_MODIFIERS
 382    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 383 #endif
 384
 385    switch (target) {
 386    case EGL_NATIVE_PIXMAP_KHR:
 387 #ifdef HAVE_DRI3_MODIFIERS
 388       if (dri2_dpy->multibuffers_available)
 389          return dri3_create_image_khr_pixmap_from_buffers(disp, ctx, buffer,
 390                                                           attr_list);
 391 #endif
 392       return dri3_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 393    default:
 394       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 395    }
 396 }
 397
 398 /**
 399  * Called by the driver when it needs to update the real front buffer with the
 400  * contents of its fake front buffer.
 401  */
 402 static void
 403 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 404 {
 405    struct loader_dri3_drawable *draw = loaderPrivate;
 406    (void) driDrawable;
 407
 408    /* There does not seem to be any kind of consensus on whether we should
 409     * support front-buffer rendering or not:
 410     * http://lists.freedesktop.org/archives/mesa-dev/2013-June/040129.html
 411     */
 412    if (!draw->is_pixmap)
 413       _eglLog(_EGL_WARNING, "FIXME: egl/x11 doesn't support front buffer rendering.");
 414 }
 415
 416 const __DRIimageLoaderExtension dri3_image_loader_extension = {
 417    .base = { __DRI_IMAGE_LOADER, 1 },
 418
 419    .getBuffers          = loader_dri3_get_buffers,
 420    .flushFrontBuffer    = dri3_flush_front_buffer,
 421 };
 422
 423 static EGLBoolean
 424 dri3_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 425 {
 426    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(draw);
 427
 428    return loader_dri3_swap_buffers_msc(&dri3_surf->loader_drawable,
 429                                        0, 0, 0, 0,
 430                                        draw->SwapBehavior == EGL_BUFFER_PRESERVED) != -1;
 431 }
 432
 433 static EGLBoolean
 434 dri3_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 435                   void *native_pixmap_target)
 436 {
 437    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 438    xcb_pixmap_t target;
 439
 440    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 441    target = (uintptr_t) native_pixmap_target;
 442
 443    loader_dri3_copy_drawable(&dri3_surf->loader_drawable, target,
 444                              dri3_surf->loader_drawable.drawable);
 445
 446    return EGL_TRUE;
 447 }
 448
 449 static int
 450 dri3_query_buffer_age(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 451 {
 452    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 453
 454    return loader_dri3_query_buffer_age(&dri3_surf->loader_drawable);
 455 }
 456
 457 static EGLBoolean
 458 dri3_query_surface(_EGLDriver *drv, _EGLDisplay *disp,
 459                    _EGLSurface *surf, EGLint attribute,
 460                    EGLint *value)
 461 {
 462    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 463
 464    switch (attribute) {
 465    case EGL_WIDTH:
 466    case EGL_HEIGHT:
 467       loader_dri3_update_drawable_geometry(&dri3_surf->loader_drawable);
 468       break;
 469    default:
 470       break;
 471    }
 472
 473    return _eglQuerySurface(drv, disp, surf, attribute, value);
 474 }
 475
 476 static __DRIdrawable *
 477 dri3_get_dri_drawable(_EGLSurface *surf)
 478 {
 479    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 480
 481    return dri3_surf->loader_drawable.dri_drawable;
 482 }
 483
 484 static void
 485 dri3_close_screen_notify(_EGLDisplay *disp)
 486 {
 487    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 488
 489    loader_dri3_close_screen(dri2_dpy->dri_screen);
 490 }
 491
 492 struct dri2_egl_display_vtbl dri3_x11_display_vtbl = {
 493    .authenticate = dri3_authenticate,
 494    .create_window_surface = dri3_create_window_surface,
 495    .create_pixmap_surface = dri3_create_pixmap_surface,
 496    .create_pbuffer_surface = dri3_create_pbuffer_surface,
 497    .destroy_surface = dri3_destroy_surface,
 498    .create_image = dri3_create_image_khr,
 499    .swap_interval = dri3_set_swap_interval,
 500    .swap_buffers = dri3_swap_buffers,
 501    .copy_buffers = dri3_copy_buffers,
 502    .query_buffer_age = dri3_query_buffer_age,
 503    .query_surface = dri3_query_surface,
 504    .get_sync_values = dri3_get_sync_values,
 505    .get_dri_drawable = dri3_get_dri_drawable,
 506    .close_screen_notify = dri3_close_screen_notify,
 507 };
 508
 509 /* Only request versions of these protocols which we actually support. */
 510 #define DRI3_SUPPORTED_MAJOR 1
 511 #define PRESENT_SUPPORTED_MAJOR 1
 512
 513 #ifdef HAVE_DRI3_MODIFIERS
 514 #define DRI3_SUPPORTED_MINOR 2
 515 #define PRESENT_SUPPORTED_MINOR 2
 516 #else
 517 #define PRESENT_SUPPORTED_MINOR 0
 518 #define DRI3_SUPPORTED_MINOR 0
 519 #endif
 520
 521 EGLBoolean
 522 dri3_x11_connect(struct dri2_egl_display *dri2_dpy)
 523 {
 524    xcb_dri3_query_version_reply_t *dri3_query;
 525    xcb_dri3_query_version_cookie_t dri3_query_cookie;
 526    xcb_present_query_version_reply_t *present_query;
 527    xcb_present_query_version_cookie_t present_query_cookie;
 528    xcb_generic_error_t *error;
 529    const xcb_query_extension_reply_t *extension;
 530
 531    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri3_id);
 532    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_present_id);
 533
 534    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri3_id);
 535    if (!(extension && extension->present))
 536       return EGL_FALSE;
 537
 538    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_present_id);
 539    if (!(extension && extension->present))
 540       return EGL_FALSE;
 541
 542    dri3_query_cookie = xcb_dri3_query_version(dri2_dpy->conn,
 543                                               DRI3_SUPPORTED_MAJOR,
 544                                               DRI3_SUPPORTED_MINOR);
 545
 546    present_query_cookie = xcb_present_query_version(dri2_dpy->conn,
 547                                                     PRESENT_SUPPORTED_MAJOR,
 548                                                     PRESENT_SUPPORTED_MINOR);
 549
 550    dri3_query =
 551       xcb_dri3_query_version_reply(dri2_dpy->conn, dri3_query_cookie, &error);
 552    if (dri3_query == NULL || error != NULL) {
 553       _eglLog(_EGL_WARNING, "DRI3: failed to query the version");
 554       free(dri3_query);
 555       free(error);
 556       return EGL_FALSE;
 557    }
 558
 559    dri2_dpy->dri3_major_version = dri3_query->major_version;
 560    dri2_dpy->dri3_minor_version = dri3_query->minor_version;
 561    free(dri3_query);
 562
 563    present_query =
 564       xcb_present_query_version_reply(dri2_dpy->conn,
 565                                       present_query_cookie, &error);
 566    if (present_query == NULL || error != NULL) {
 567       _eglLog(_EGL_WARNING, "DRI3: failed to query Present version");
 568       free(present_query);
 569       free(error);
 570       return EGL_FALSE;
 571    }
 572
 573    dri2_dpy->present_major_version = present_query->major_version;
 574    dri2_dpy->present_minor_version = present_query->minor_version;
 575    free(present_query);
 576
 577    dri2_dpy->fd = loader_dri3_open(dri2_dpy->conn, dri2_dpy->screen->root, 0);
 578    if (dri2_dpy->fd < 0) {
 579       int conn_error = xcb_connection_has_error(dri2_dpy->conn);
 580       _eglLog(_EGL_WARNING, "DRI3: Screen seems not DRI3 capable");
 581
 582       if (conn_error)
 583          _eglLog(_EGL_WARNING, "DRI3: Failed to initialize");
 584
 585       return EGL_FALSE;
 586    }
 587
 588    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd, &dri2_dpy->is_different_gpu);
 589
 590    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 591    if (!dri2_dpy->driver_name) {
 592       _eglLog(_EGL_WARNING, "DRI3: No driver found");
 593       close(dri2_dpy->fd);
 594       return EGL_FALSE;
 595    }
 596
 597 #ifdef HAVE_WAYLAND_PLATFORM
 598    /* Only try to get a render device name since dri3 doesn't provide a
 599     * mechanism for authenticating client opened device node fds. If this
 600     * fails then don't advertise the extension. */
 601    dri2_dpy->device_name = drmGetRenderDeviceNameFromFd(dri2_dpy->fd);
 602 #endif
 603
 604    return EGL_TRUE;
 605 }