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 "egl_dri2_fallbacks.h"
  37 #include "platform_x11_dri3.h"
  38
  39 #include "loader.h"
  40 #include "loader_dri3_helper.h"
  41
  42 static uint32_t
  43 dri3_format_for_depth(uint32_t depth)
  44 {
  45    switch (depth) {
  46    case 16:
  47       return __DRI_IMAGE_FORMAT_RGB565;
  48    case 24:
  49       return __DRI_IMAGE_FORMAT_XRGB8888;
  50    case 30:
  51       return __DRI_IMAGE_FORMAT_XRGB2101010;
  52    case 32:
  53       return __DRI_IMAGE_FORMAT_ARGB8888;
  54    default:
  55       return __DRI_IMAGE_FORMAT_NONE;
  56    }
  57 }
  58
  59 static struct dri3_egl_surface *
  60 loader_drawable_to_egl_surface(struct loader_dri3_drawable *draw) {
  61    size_t offset = offsetof(struct dri3_egl_surface, loader_drawable);
  62    return (struct dri3_egl_surface *)(((void*) draw) - offset);
  63 }
  64
  65 static void
  66 egl_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
  67                            int width, int height)
  68 {
  69    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  70
  71    dri3_surf->surf.base.Width = width;
  72    dri3_surf->surf.base.Height = height;
  73 }
  74
  75 static bool
  76 egl_dri3_in_current_context(struct loader_dri3_drawable *draw)
  77 {
  78    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
  79    _EGLContext *ctx = _eglGetCurrentContext();
  80
  81    return ctx->Resource.Display == dri3_surf->surf.base.Resource.Display;
  82 }
  83
  84 static __DRIcontext *
  85 egl_dri3_get_dri_context(struct loader_dri3_drawable *draw)
  86 {
  87    _EGLContext *ctx = _eglGetCurrentContext();
  88    struct dri2_egl_context *dri2_ctx;
  89    if (!ctx)
  90       return NULL;
  91    dri2_ctx = dri2_egl_context(ctx);
  92    return dri2_ctx->dri_context;
  93 }
  94
  95 static __DRIscreen *
  96 egl_dri3_get_dri_screen(void)
  97 {
  98    _EGLContext *ctx = _eglGetCurrentContext();
  99    struct dri2_egl_context *dri2_ctx;
 100    if (!ctx)
 101       return NULL;
 102    dri2_ctx = dri2_egl_context(ctx);
 103    return dri2_egl_display(dri2_ctx->base.Resource.Display)->dri_screen;
 104 }
 105
 106 static void
 107 egl_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 108 {
 109    struct dri3_egl_surface *dri3_surf = loader_drawable_to_egl_surface(draw);
 110    _EGLDisplay *disp = dri3_surf->surf.base.Resource.Display;
 111
 112    dri2_flush_drawable_for_swapbuffers(disp, &dri3_surf->surf.base);
 113 }
 114
 115 static const struct loader_dri3_vtable egl_dri3_vtable = {
 116    .set_drawable_size = egl_dri3_set_drawable_size,
 117    .in_current_context = egl_dri3_in_current_context,
 118    .get_dri_context = egl_dri3_get_dri_context,
 119    .get_dri_screen = egl_dri3_get_dri_screen,
 120    .flush_drawable = egl_dri3_flush_drawable,
 121    .show_fps = NULL,
 122 };
 123
 124 static EGLBoolean
 125 dri3_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 126 {
 127    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 128
 129    (void) drv;
 130
 131    loader_dri3_drawable_fini(&dri3_surf->loader_drawable);
 132
 133    dri2_fini_surface(surf);
 134    free(surf);
 135
 136    return EGL_TRUE;
 137 }
 138
 139 static EGLBoolean
 140 dri3_set_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 141                        EGLint interval)
 142 {
 143    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 144
 145    dri3_surf->surf.base.SwapInterval = interval;
 146    loader_dri3_set_swap_interval(&dri3_surf->loader_drawable, interval);
 147
 148    return EGL_TRUE;
 149 }
 150
 151 static _EGLSurface *
 152 dri3_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 153                     _EGLConfig *conf, void *native_surface,
 154                     const EGLint *attrib_list)
 155 {
 156    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 157    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 158    struct dri3_egl_surface *dri3_surf;
 159    const __DRIconfig *dri_config;
 160    xcb_drawable_t drawable;
 161
 162    (void) drv;
 163
 164    dri3_surf = calloc(1, sizeof *dri3_surf);
 165    if (!dri3_surf) {
 166       _eglError(EGL_BAD_ALLOC, "dri3_create_surface");
 167       return NULL;
 168    }
 169
 170    if (!dri2_init_surface(&dri3_surf->surf.base, disp, type, conf, attrib_list, false))
 171       goto cleanup_surf;
 172
 173    if (type == EGL_PBUFFER_BIT) {
 174       drawable = xcb_generate_id(dri2_dpy->conn);
 175       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 176                         drawable, dri2_dpy->screen->root,
 177                         dri3_surf->surf.base.Width, dri3_surf->surf.base.Height);
 178    } else {
 179       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 180       drawable = (uintptr_t) native_surface;
 181    }
 182
 183    dri_config = dri2_get_dri_config(dri2_conf, type,
 184                                     dri3_surf->surf.base.GLColorspace);
 185
 186    if (loader_dri3_drawable_init(dri2_dpy->conn, drawable,
 187                                  dri2_dpy->dri_screen,
 188                                  dri2_dpy->is_different_gpu,
 189                                  dri2_dpy->multibuffers_available,
 190                                  dri_config,
 191                                  &dri2_dpy->loader_dri3_ext,
 192                                  &egl_dri3_vtable,
 193                                  &dri3_surf->loader_drawable)) {
 194       _eglError(EGL_BAD_ALLOC, "dri3_surface_create");
 195       goto cleanup_pixmap;
 196    }
 197
 198    return &dri3_surf->surf.base;
 199
 200  cleanup_pixmap:
 201    if (type == EGL_PBUFFER_BIT)
 202       xcb_free_pixmap(dri2_dpy->conn, drawable);
 203  cleanup_surf:
 204    free(dri3_surf);
 205
 206    return NULL;
 207 }
 208
 209 static int
 210 dri3_authenticate(_EGLDisplay *disp, uint32_t id)
 211 {
 212 #ifdef HAVE_WAYLAND_PLATFORM
 213    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 214
 215    if (dri2_dpy->device_name) {
 216       _eglLog(_EGL_WARNING,
 217               "Wayland client render node authentication is unnecessary");
 218       return 0;
 219    }
 220
 221    _eglLog(_EGL_WARNING,
 222            "Wayland client primary node authentication isn't supported");
 223 #endif
 224
 225    return -1;
 226 }
 227
 228 /**
 229  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 230  */
 231 static _EGLSurface *
 232 dri3_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 233                            _EGLConfig *conf, void *native_window,
 234                            const EGLint *attrib_list)
 235 {
 236    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 237    _EGLSurface *surf;
 238
 239    surf = dri3_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 240                               native_window, attrib_list);
 241    if (surf != NULL)
 242       dri3_set_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 243
 244    return surf;
 245 }
 246
 247 static _EGLSurface *
 248 dri3_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 249                            _EGLConfig *conf, void *native_pixmap,
 250                            const EGLint *attrib_list)
 251 {
 252    return dri3_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 253                               native_pixmap, attrib_list);
 254 }
 255
 256 static _EGLSurface *
 257 dri3_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 258                                 _EGLConfig *conf, const EGLint *attrib_list)
 259 {
 260    return dri3_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 261                               NULL, attrib_list);
 262 }
 263
 264 static EGLBoolean
 265 dri3_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
 266                      EGLuint64KHR *ust, EGLuint64KHR *msc,
 267                      EGLuint64KHR *sbc)
 268 {
 269    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surface);
 270
 271    return loader_dri3_wait_for_msc(&dri3_surf->loader_drawable, 0, 0, 0,
 272                                    (int64_t *) ust, (int64_t *) msc,
 273                                    (int64_t *) sbc) ? EGL_TRUE : EGL_FALSE;
 274 }
 275
 276 static _EGLImage *
 277 dri3_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 278                              EGLClientBuffer buffer, const EGLint *attr_list)
 279 {
 280    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 281    struct dri2_egl_image *dri2_img;
 282    xcb_drawable_t drawable;
 283    xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie;
 284    xcb_dri3_buffer_from_pixmap_reply_t  *bp_reply;
 285    unsigned int format;
 286
 287    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 288    bp_cookie = xcb_dri3_buffer_from_pixmap(dri2_dpy->conn, drawable);
 289    bp_reply = xcb_dri3_buffer_from_pixmap_reply(dri2_dpy->conn,
 290                                                 bp_cookie, NULL);
 291    if (!bp_reply) {
 292       _eglError(EGL_BAD_ALLOC, "xcb_dri3_buffer_from_pixmap");
 293       return NULL;
 294    }
 295
 296    format = dri3_format_for_depth(bp_reply->depth);
 297    if (format == __DRI_IMAGE_FORMAT_NONE) {
 298       _eglError(EGL_BAD_PARAMETER,
 299                 "dri3_create_image_khr: unsupported pixmap depth");
 300       free(bp_reply);
 301       return EGL_NO_IMAGE_KHR;
 302    }
 303
 304    dri2_img = malloc(sizeof *dri2_img);
 305    if (!dri2_img) {
 306       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 307       free(bp_reply);
 308       return EGL_NO_IMAGE_KHR;
 309    }
 310
 311    _eglInitImage(&dri2_img->base, disp);
 312
 313    dri2_img->dri_image = loader_dri3_create_image(dri2_dpy->conn,
 314                                                   bp_reply,
 315                                                   format,
 316                                                   dri2_dpy->dri_screen,
 317                                                   dri2_dpy->image,
 318                                                   dri2_img);
 319
 320    free(bp_reply);
 321
 322    return &dri2_img->base;
 323 }
 324
 325 static _EGLImage *
 326 dri3_create_image_khr_pixmap_from_buffers(_EGLDisplay *disp, _EGLContext *ctx,
 327                                           EGLClientBuffer buffer,
 328                                           const EGLint *attr_list)
 329 {
 330    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 331    struct dri2_egl_image *dri2_img;
 332    xcb_dri3_buffers_from_pixmap_cookie_t bp_cookie;
 333    xcb_dri3_buffers_from_pixmap_reply_t  *bp_reply;
 334    xcb_drawable_t drawable;
 335    unsigned int format;
 336
 337    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 338    bp_cookie = xcb_dri3_buffers_from_pixmap(dri2_dpy->conn, drawable);
 339    bp_reply = xcb_dri3_buffers_from_pixmap_reply(dri2_dpy->conn,
 340                                                  bp_cookie, NULL);
 341
 342    if (!bp_reply) {
 343       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 344       return EGL_NO_IMAGE_KHR;
 345    }
 346
 347    format = dri3_format_for_depth(bp_reply->depth);
 348    if (format == __DRI_IMAGE_FORMAT_NONE) {
 349       _eglError(EGL_BAD_PARAMETER,
 350                 "dri3_create_image_khr: unsupported pixmap depth");
 351       free(bp_reply);
 352       return EGL_NO_IMAGE_KHR;
 353    }
 354
 355    dri2_img = malloc(sizeof *dri2_img);
 356    if (!dri2_img) {
 357       _eglError(EGL_BAD_ALLOC, "dri3_create_image_khr");
 358       free(bp_reply);
 359       return EGL_NO_IMAGE_KHR;
 360    }
 361
 362    _eglInitImage(&dri2_img->base, disp);
 363
 364    dri2_img->dri_image = loader_dri3_create_image_from_buffers(dri2_dpy->conn,
 365                                                                bp_reply,
 366                                                                format,
 367                                                                dri2_dpy->dri_screen,
 368                                                                dri2_dpy->image,
 369                                                                dri2_img);
 370    free(bp_reply);
 371
 372    if (!dri2_img->dri_image) {
 373       _eglError(EGL_BAD_ATTRIBUTE, "dri3_create_image_khr");
 374       free(dri2_img);
 375       return EGL_NO_IMAGE_KHR;
 376    }
 377
 378    return &dri2_img->base;
 379 }
 380
 381 static _EGLImage *
 382 dri3_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 383                       _EGLContext *ctx, EGLenum target,
 384                       EGLClientBuffer buffer, const EGLint *attr_list)
 385 {
 386    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 387
 388    switch (target) {
 389    case EGL_NATIVE_PIXMAP_KHR:
 390       if (dri2_dpy->multibuffers_available)
 391          return dri3_create_image_khr_pixmap_from_buffers(disp, ctx, buffer,
 392                                                           attr_list);
 393       return dri3_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 394    default:
 395       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 396    }
 397 }
 398
 399 /**
 400  * Called by the driver when it needs to update the real front buffer with the
 401  * contents of its fake front buffer.
 402  */
 403 static void
 404 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 405 {
 406    /* There does not seem to be any kind of consensus on whether we should
 407     * support front-buffer rendering or not:
 408     * http://lists.freedesktop.org/archives/mesa-dev/2013-June/040129.html
 409     */
 410    _eglLog(_EGL_WARNING, "FIXME: egl/x11 doesn't support front buffer rendering.");
 411    (void) driDrawable;
 412    (void) loaderPrivate;
 413 }
 414
 415 const __DRIimageLoaderExtension dri3_image_loader_extension = {
 416    .base = { __DRI_IMAGE_LOADER, 1 },
 417
 418    .getBuffers          = loader_dri3_get_buffers,
 419    .flushFrontBuffer    = dri3_flush_front_buffer,
 420 };
 421
 422 static EGLBoolean
 423 dri3_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 424 {
 425    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(draw);
 426
 427    /* No-op for a pixmap or pbuffer surface */
 428    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 429       return EGL_FALSE;
 430
 431    return loader_dri3_swap_buffers_msc(&dri3_surf->loader_drawable,
 432                                        0, 0, 0, 0,
 433                                        draw->SwapBehavior == EGL_BUFFER_PRESERVED) != -1;
 434 }
 435
 436 static EGLBoolean
 437 dri3_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 438                   void *native_pixmap_target)
 439 {
 440    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 441    xcb_pixmap_t target;
 442
 443    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 444    target = (uintptr_t) native_pixmap_target;
 445
 446    loader_dri3_copy_drawable(&dri3_surf->loader_drawable, target,
 447                              dri3_surf->loader_drawable.drawable);
 448
 449    return EGL_TRUE;
 450 }
 451
 452 static int
 453 dri3_query_buffer_age(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf)
 454 {
 455    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 456
 457    return loader_dri3_query_buffer_age(&dri3_surf->loader_drawable);
 458 }
 459
 460 static EGLBoolean
 461 dri3_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 462                    _EGLSurface *surf, EGLint attribute,
 463                    EGLint *value)
 464 {
 465    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 466
 467    switch (attribute) {
 468    case EGL_WIDTH:
 469    case EGL_HEIGHT:
 470       loader_dri3_update_drawable_geometry(&dri3_surf->loader_drawable);
 471       break;
 472    default:
 473       break;
 474    }
 475
 476    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 477 }
 478
 479 static __DRIdrawable *
 480 dri3_get_dri_drawable(_EGLSurface *surf)
 481 {
 482    struct dri3_egl_surface *dri3_surf = dri3_egl_surface(surf);
 483
 484    return dri3_surf->loader_drawable.dri_drawable;
 485 }
 486
 487 static void
 488 dri3_close_screen_notify(_EGLDisplay *dpy)
 489 {
 490    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 491
 492    loader_dri3_close_screen(dri2_dpy->dri_screen);
 493 }
 494
 495 struct dri2_egl_display_vtbl dri3_x11_display_vtbl = {
 496    .authenticate = dri3_authenticate,
 497    .create_window_surface = dri3_create_window_surface,
 498    .create_pixmap_surface = dri3_create_pixmap_surface,
 499    .create_pbuffer_surface = dri3_create_pbuffer_surface,
 500    .destroy_surface = dri3_destroy_surface,
 501    .create_image = dri3_create_image_khr,
 502    .swap_interval = dri3_set_swap_interval,
 503    .swap_buffers = dri3_swap_buffers,
 504    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 505    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 506    .set_damage_region = dri2_fallback_set_damage_region,
 507    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 508    .copy_buffers = dri3_copy_buffers,
 509    .query_buffer_age = dri3_query_buffer_age,
 510    .query_surface = dri3_query_surface,
 511    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 512    .get_sync_values = dri3_get_sync_values,
 513    .get_dri_drawable = dri3_get_dri_drawable,
 514    .close_screen_notify = dri3_close_screen_notify,
 515 };
 516
 517 EGLBoolean
 518 dri3_x11_connect(struct dri2_egl_display *dri2_dpy)
 519 {
 520    xcb_dri3_query_version_reply_t *dri3_query;
 521    xcb_dri3_query_version_cookie_t dri3_query_cookie;
 522    xcb_present_query_version_reply_t *present_query;
 523    xcb_present_query_version_cookie_t present_query_cookie;
 524    xcb_generic_error_t *error;
 525    const xcb_query_extension_reply_t *extension;
 526
 527    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri3_id);
 528    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_present_id);
 529
 530    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri3_id);
 531    if (!(extension && extension->present))
 532       return EGL_FALSE;
 533
 534    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_present_id);
 535    if (!(extension && extension->present))
 536       return EGL_FALSE;
 537
 538    dri3_query_cookie = xcb_dri3_query_version(dri2_dpy->conn,
 539                                               XCB_DRI3_MAJOR_VERSION,
 540                                               XCB_DRI3_MINOR_VERSION);
 541
 542    present_query_cookie = xcb_present_query_version(dri2_dpy->conn,
 543                                                     XCB_PRESENT_MAJOR_VERSION,
 544                                                     XCB_PRESENT_MINOR_VERSION);
 545
 546    dri3_query =
 547       xcb_dri3_query_version_reply(dri2_dpy->conn, dri3_query_cookie, &error);
 548    if (dri3_query == NULL || error != NULL) {
 549       _eglLog(_EGL_WARNING, "DRI3: failed to query the version");
 550       free(dri3_query);
 551       free(error);
 552       return EGL_FALSE;
 553    }
 554
 555    dri2_dpy->dri3_major_version = dri3_query->major_version;
 556    dri2_dpy->dri3_minor_version = dri3_query->minor_version;
 557    free(dri3_query);
 558
 559    present_query =
 560       xcb_present_query_version_reply(dri2_dpy->conn,
 561                                       present_query_cookie, &error);
 562    if (present_query == NULL || error != NULL) {
 563       _eglLog(_EGL_WARNING, "DRI3: failed to query Present version");
 564       free(present_query);
 565       free(error);
 566       return EGL_FALSE;
 567    }
 568
 569    dri2_dpy->present_major_version = present_query->major_version;
 570    dri2_dpy->present_minor_version = present_query->minor_version;
 571    free(present_query);
 572
 573    dri2_dpy->fd = loader_dri3_open(dri2_dpy->conn, dri2_dpy->screen->root, 0);
 574    if (dri2_dpy->fd < 0) {
 575       int conn_error = xcb_connection_has_error(dri2_dpy->conn);
 576       _eglLog(_EGL_WARNING, "DRI3: Screen seems not DRI3 capable");
 577
 578       if (conn_error)
 579          _eglLog(_EGL_WARNING, "DRI3: Failed to initialize");
 580
 581       return EGL_FALSE;
 582    }
 583
 584    dri2_dpy->fd = loader_get_user_preferred_fd(dri2_dpy->fd, &dri2_dpy->is_different_gpu);
 585
 586    dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 587    if (!dri2_dpy->driver_name) {
 588       _eglLog(_EGL_WARNING, "DRI3: No driver found");
 589       close(dri2_dpy->fd);
 590       return EGL_FALSE;
 591    }
 592
 593 #ifdef HAVE_WAYLAND_PLATFORM
 594    /* Only try to get a render device name since dri3 doesn't provide a
 595     * mechanism for authenticating client opened device node fds. If this
 596     * fails then don't advertise the extension. */
 597    dri2_dpy->device_name = drmGetRenderDeviceNameFromFd(dri2_dpy->fd);
 598 #endif
 599
 600    return EGL_TRUE;
 601 }