src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <limits.h>
  32 #include <dlfcn.h>
  33 #include <fcntl.h>
  34 #include <errno.h>
  35 #include <unistd.h>
  36 #ifdef HAVE_LIBDRM
  37 #include <xf86drm.h>
  38 #endif
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #include "egl_dri2.h"
  43
  44 static void
  45 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  46                      struct dri2_egl_surface * dri2_surf,
  47                      int depth)
  48 {
  49    uint32_t           mask;
  50    const uint32_t     function = GXcopy;
  51    uint32_t           valgc[2];
  52
  53    /* create GC's */
  54    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  55    mask = XCB_GC_FUNCTION;
  56    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  57
  58    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  59    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  60    valgc[0] = function;
  61    valgc[1] = False;
  62    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  63    dri2_surf->depth = depth;
  64    switch (depth) {
  65       case 32:
  66       case 24:
  67          dri2_surf->bytes_per_pixel = 4;
  68          break;
  69       case 16:
  70          dri2_surf->bytes_per_pixel = 2;
  71          break;
  72       case 8:
  73          dri2_surf->bytes_per_pixel = 1;
  74          break;
  75       case 0:
  76          dri2_surf->bytes_per_pixel = 0;
  77          break;
  78       default:
  79          _eglLog(_EGL_WARNING, "unsupported depth %d", depth);
  80    }
  81 }
  82
  83 static void
  84 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  85                       struct dri2_egl_surface * dri2_surf)
  86 {
  87    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  88    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  89 }
  90
  91 static void
  92 swrastGetDrawableInfo(__DRIdrawable * draw,
  93                       int *x, int *y, int *w, int *h,
  94                       void *loaderPrivate)
  95 {
  96    struct dri2_egl_surface *dri2_surf = loaderPrivate;
  97    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
  98
  99    xcb_get_geometry_cookie_t cookie;
 100    xcb_get_geometry_reply_t *reply;
 101    xcb_generic_error_t *error;
 102
 103    *w = *h = 0;
 104    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 105    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 106    if (reply == NULL)
 107       return;
 108
 109    if (error != NULL) {
 110       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 111       free(error);
 112    } else {
 113       *w = reply->width;
 114       *h = reply->height;
 115    }
 116    free(reply);
 117 }
 118
 119 static void
 120 swrastPutImage(__DRIdrawable * draw, int op,
 121                int x, int y, int w, int h,
 122                char *data, void *loaderPrivate)
 123 {
 124    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 125    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 126
 127    xcb_gcontext_t gc;
 128
 129    switch (op) {
 130    case __DRI_SWRAST_IMAGE_OP_DRAW:
 131       gc = dri2_surf->gc;
 132       break;
 133    case __DRI_SWRAST_IMAGE_OP_SWAP:
 134       gc = dri2_surf->swapgc;
 135       break;
 136    default:
 137       return;
 138    }
 139
 140    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 141                  gc, w, h, x, y, 0, dri2_surf->depth,
 142                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 143 }
 144
 145 static void
 146 swrastGetImage(__DRIdrawable * read,
 147                int x, int y, int w, int h,
 148                char *data, void *loaderPrivate)
 149 {
 150    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 151    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 152
 153    xcb_get_image_cookie_t cookie;
 154    xcb_get_image_reply_t *reply;
 155    xcb_generic_error_t *error;
 156
 157    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 158                            dri2_surf->drawable, x, y, w, h, ~0);
 159    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 160    if (reply == NULL)
 161       return;
 162
 163    if (error != NULL) {
 164       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 165       free(error);
 166    } else {
 167       uint32_t bytes = xcb_get_image_data_length(reply);
 168       uint8_t *idata = xcb_get_image_data(reply);
 169       memcpy(data, idata, bytes);
 170    }
 171    free(reply);
 172 }
 173
 174
 175 /**
 176  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 177  */
 178 static _EGLSurface *
 179 dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 180                     _EGLConfig *conf, EGLNativeWindowType native_window,
 181                     const EGLint *attrib_list)
 182 {
 183    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 184    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 185    struct dri2_egl_surface *dri2_surf;
 186    xcb_get_geometry_cookie_t cookie;
 187    xcb_get_geometry_reply_t *reply;
 188    xcb_screen_iterator_t s;
 189    xcb_generic_error_t *error;
 190    xcb_drawable_t window = (uintptr_t )native_window;
 191
 192    (void) drv;
 193
 194    dri2_surf = malloc(sizeof *dri2_surf);
 195    if (!dri2_surf) {
 196       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 197       return NULL;
 198    }
 199
 200    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 201       goto cleanup_surf;
 202
 203    dri2_surf->region = XCB_NONE;
 204    if (type == EGL_PBUFFER_BIT) {
 205       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 206       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 207       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 208                         dri2_surf->drawable, s.data->root,
 209                         dri2_surf->base.Width, dri2_surf->base.Height);
 210    } else {
 211       dri2_surf->drawable = window;
 212    }
 213
 214    if (dri2_dpy->dri2) {
 215       dri2_surf->dri_drawable =
 216          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 217                                                type == EGL_WINDOW_BIT ?
 218                                                dri2_conf->dri_double_config :
 219                                                dri2_conf->dri_single_config,
 220                                                dri2_surf);
 221    } else {
 222       assert(dri2_dpy->swrast);
 223       dri2_surf->dri_drawable =
 224          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 225                                                  dri2_conf->dri_double_config,
 226                                                  dri2_surf);
 227    }
 228
 229    if (dri2_surf->dri_drawable == NULL) {
 230       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 231       goto cleanup_pixmap;
 232    }
 233
 234    if (dri2_dpy->dri2) {
 235       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 236    } else {
 237       swrastCreateDrawable(dri2_dpy, dri2_surf, _eglGetConfigKey(conf, EGL_BUFFER_SIZE));
 238    }
 239
 240    if (type != EGL_PBUFFER_BIT) {
 241       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 242       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 243       if (reply == NULL || error != NULL) {
 244          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 245          free(error);
 246          goto cleanup_dri_drawable;
 247       }
 248
 249       dri2_surf->base.Width = reply->width;
 250       dri2_surf->base.Height = reply->height;
 251       free(reply);
 252    }
 253
 254    /* we always copy the back buffer to front */
 255    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 256
 257    return &dri2_surf->base;
 258
 259  cleanup_dri_drawable:
 260    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 261  cleanup_pixmap:
 262    if (type == EGL_PBUFFER_BIT)
 263       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 264  cleanup_surf:
 265    free(dri2_surf);
 266
 267    return NULL;
 268 }
 269
 270 /**
 271  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 272  */
 273 static _EGLSurface *
 274 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 275                            _EGLConfig *conf, EGLNativeWindowType window,
 276                            const EGLint *attrib_list)
 277 {
 278    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 279    _EGLSurface *surf;
 280
 281    surf = dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 282                               window, attrib_list);
 283    if (surf != NULL) {
 284       /* When we first create the DRI2 drawable, its swap interval on the
 285        * server side is 1.
 286        */
 287       surf->SwapInterval = 1;
 288
 289       /* Override that with a driconf-set value. */
 290       drv->API.SwapInterval(drv, disp, surf, dri2_dpy->default_swap_interval);
 291    }
 292
 293    return surf;
 294 }
 295
 296 static _EGLSurface *
 297 dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 298                            _EGLConfig *conf, EGLNativePixmapType pixmap,
 299                            const EGLint *attrib_list)
 300 {
 301    return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 302                               pixmap, attrib_list);
 303 }
 304
 305 static _EGLSurface *
 306 dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 307                             _EGLConfig *conf, const EGLint *attrib_list)
 308 {
 309    return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 310                               XCB_WINDOW_NONE, attrib_list);
 311 }
 312
 313 static EGLBoolean
 314 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 315 {
 316    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 317    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 318
 319    (void) drv;
 320
 321    if (!_eglPutSurface(surf))
 322       return EGL_TRUE;
 323
 324    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 325
 326    if (dri2_dpy->dri2) {
 327       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 328    } else {
 329       assert(dri2_dpy->swrast);
 330       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 331    }
 332
 333    if (surf->Type == EGL_PBUFFER_BIT)
 334       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 335
 336    free(surf);
 337
 338    return EGL_TRUE;
 339 }
 340
 341 /**
 342  * Process list of buffer received from the server
 343  *
 344  * Processes the list of buffers received in a reply from the server to either
 345  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 346  */
 347 static void
 348 dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
 349                      xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 350 {
 351    struct dri2_egl_display *dri2_dpy =
 352       dri2_egl_display(dri2_surf->base.Resource.Display);
 353    xcb_rectangle_t rectangle;
 354    unsigned i;
 355
 356    dri2_surf->buffer_count = count;
 357    dri2_surf->have_fake_front = 0;
 358
 359    /* This assumes the DRI2 buffer attachment tokens matches the
 360     * __DRIbuffer tokens. */
 361    for (i = 0; i < count; i++) {
 362       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 363       dri2_surf->buffers[i].name = buffers[i].name;
 364       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 365       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 366       dri2_surf->buffers[i].flags = buffers[i].flags;
 367
 368       /* We only use the DRI drivers single buffer configs.  This
 369        * means that if we try to render to a window, DRI2 will give us
 370        * the fake front buffer, which we'll use as a back buffer.
 371        * Note that EGL doesn't require that several clients rendering
 372        * to the same window must see the same aux buffers. */
 373       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 374          dri2_surf->have_fake_front = 1;
 375    }
 376
 377    if (dri2_surf->region != XCB_NONE)
 378       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 379
 380    rectangle.x = 0;
 381    rectangle.y = 0;
 382    rectangle.width = dri2_surf->base.Width;
 383    rectangle.height = dri2_surf->base.Height;
 384    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 385    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 386 }
 387
 388 static __DRIbuffer *
 389 dri2_get_buffers(__DRIdrawable * driDrawable,
 390                 int *width, int *height,
 391                 unsigned int *attachments, int count,
 392                 int *out_count, void *loaderPrivate)
 393 {
 394    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 395    struct dri2_egl_display *dri2_dpy =
 396       dri2_egl_display(dri2_surf->base.Resource.Display);
 397    xcb_dri2_dri2_buffer_t *buffers;
 398    xcb_dri2_get_buffers_reply_t *reply;
 399    xcb_dri2_get_buffers_cookie_t cookie;
 400
 401    (void) driDrawable;
 402
 403    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 404                                             dri2_surf->drawable,
 405                                             count, count, attachments);
 406    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 407    buffers = xcb_dri2_get_buffers_buffers (reply);
 408    if (buffers == NULL)
 409       return NULL;
 410
 411    *out_count = reply->count;
 412    dri2_surf->base.Width = *width = reply->width;
 413    dri2_surf->base.Height = *height = reply->height;
 414    dri2_process_buffers(dri2_surf, buffers, *out_count);
 415
 416    free(reply);
 417
 418    return dri2_surf->buffers;
 419 }
 420
 421 static __DRIbuffer *
 422 dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
 423                              int *width, int *height,
 424                              unsigned int *attachments, int count,
 425                              int *out_count, void *loaderPrivate)
 426 {
 427    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 428    struct dri2_egl_display *dri2_dpy =
 429       dri2_egl_display(dri2_surf->base.Resource.Display);
 430    xcb_dri2_dri2_buffer_t *buffers;
 431    xcb_dri2_get_buffers_with_format_reply_t *reply;
 432    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 433    xcb_dri2_attach_format_t *format_attachments;
 434
 435    (void) driDrawable;
 436
 437    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 438    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 439                                                         dri2_surf->drawable,
 440                                                         count, count,
 441                                                         format_attachments);
 442
 443    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 444                                                    cookie, NULL);
 445    if (reply == NULL)
 446       return NULL;
 447
 448    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 449    dri2_surf->base.Width = *width = reply->width;
 450    dri2_surf->base.Height = *height = reply->height;
 451    *out_count = reply->count;
 452    dri2_process_buffers(dri2_surf, buffers, *out_count);
 453
 454    free(reply);
 455
 456    return dri2_surf->buffers;
 457 }
 458
 459 static void
 460 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 461 {
 462    (void) driDrawable;
 463
 464    /* FIXME: Does EGL support front buffer rendering at all? */
 465
 466 #if 0
 467    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 468
 469    dri2WaitGL(dri2_surf);
 470 #else
 471    (void) loaderPrivate;
 472 #endif
 473 }
 474
 475 static char *
 476 dri2_strndup(const char *s, int length)
 477 {
 478    char *d;
 479
 480    d = malloc(length + 1);
 481    if (d == NULL)
 482       return NULL;
 483
 484    memcpy(d, s, length);
 485    d[length] = '\0';
 486
 487    return d;
 488 }
 489
 490 static EGLBoolean
 491 dri2_connect(struct dri2_egl_display *dri2_dpy)
 492 {
 493    xcb_xfixes_query_version_reply_t *xfixes_query;
 494    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 495    xcb_dri2_query_version_reply_t *dri2_query;
 496    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 497    xcb_dri2_connect_reply_t *connect;
 498    xcb_dri2_connect_cookie_t connect_cookie;
 499    xcb_generic_error_t *error;
 500    xcb_screen_iterator_t s;
 501    char *driver_name, *device_name;
 502    const xcb_query_extension_reply_t *extension;
 503
 504    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 505    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 506
 507    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 508    if (!(extension && extension->present))
 509       return EGL_FALSE;
 510
 511    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 512    if (!(extension && extension->present))
 513       return EGL_FALSE;
 514
 515    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 516                                                   XCB_XFIXES_MAJOR_VERSION,
 517                                                   XCB_XFIXES_MINOR_VERSION);
 518
 519    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 520                                                XCB_DRI2_MAJOR_VERSION,
 521                                                XCB_DRI2_MINOR_VERSION);
 522
 523    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 524    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 525                                                 s.data->root,
 526                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 527
 528    xfixes_query =
 529       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 530                                       xfixes_query_cookie, &error);
 531    if (xfixes_query == NULL ||
 532        error != NULL || xfixes_query->major_version < 2) {
 533       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 534       free(error);
 535       return EGL_FALSE;
 536    }
 537    free(xfixes_query);
 538
 539    dri2_query =
 540       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 541    if (dri2_query == NULL || error != NULL) {
 542       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 543       free(error);
 544       return EGL_FALSE;
 545    }
 546    dri2_dpy->dri2_major = dri2_query->major_version;
 547    dri2_dpy->dri2_minor = dri2_query->minor_version;
 548    free(dri2_query);
 549
 550    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 551    if (connect == NULL ||
 552        connect->driver_name_length + connect->device_name_length == 0) {
 553       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 554       return EGL_FALSE;
 555    }
 556
 557    driver_name = xcb_dri2_connect_driver_name (connect);
 558    dri2_dpy->driver_name =
 559       dri2_strndup(driver_name,
 560                    xcb_dri2_connect_driver_name_length (connect));
 561
 562    device_name = xcb_dri2_connect_device_name (connect);
 563
 564    dri2_dpy->device_name =
 565       dri2_strndup(device_name,
 566                    xcb_dri2_connect_device_name_length (connect));
 567
 568    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 569       free(dri2_dpy->device_name);
 570       free(dri2_dpy->driver_name);
 571       free(connect);
 572       return EGL_FALSE;
 573    }
 574    free(connect);
 575
 576    return EGL_TRUE;
 577 }
 578
 579 static int
 580 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 581 {
 582    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 583    xcb_dri2_authenticate_reply_t *authenticate;
 584    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 585    xcb_screen_iterator_t s;
 586    int ret = 0;
 587
 588    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 589    authenticate_cookie =
 590       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, id);
 591    authenticate =
 592       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 593
 594    if (authenticate == NULL || !authenticate->authenticated)
 595       ret = -1;
 596
 597    free(authenticate);
 598
 599    return ret;
 600 }
 601
 602 static EGLBoolean
 603 dri2_authenticate(_EGLDisplay *disp)
 604 {
 605 #ifdef HAVE_LIBDRM
 606    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 607    drm_magic_t magic;
 608
 609    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 610       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 611       return EGL_FALSE;
 612    }
 613
 614    if (dri2_x11_authenticate(disp, magic) < 0) {
 615       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 616       return EGL_FALSE;
 617    }
 618 #endif
 619    return EGL_TRUE;
 620 }
 621
 622 static EGLBoolean
 623 dri2_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 624                              _EGLDisplay *disp)
 625 {
 626    xcb_screen_iterator_t s;
 627    xcb_depth_iterator_t d;
 628    xcb_visualtype_t *visuals;
 629    int i, j, id;
 630    unsigned int rgba_masks[4];
 631    EGLint surface_type;
 632    EGLint config_attrs[] = {
 633            EGL_NATIVE_VISUAL_ID,   0,
 634            EGL_NATIVE_VISUAL_TYPE, 0,
 635            EGL_NONE
 636    };
 637
 638    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 639    d = xcb_screen_allowed_depths_iterator(s.data);
 640    id = 1;
 641
 642    surface_type =
 643       EGL_WINDOW_BIT |
 644       EGL_PIXMAP_BIT |
 645       EGL_PBUFFER_BIT |
 646       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 647
 648    while (d.rem > 0) {
 649       EGLBoolean class_added[6] = { 0, };
 650
 651       visuals = xcb_depth_visuals(d.data);
 652       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 653          if (class_added[visuals[i]._class])
 654             continue;
 655
 656          class_added[visuals[i]._class] = EGL_TRUE;
 657          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 658             config_attrs[1] = visuals[i].visual_id;
 659             config_attrs[3] = visuals[i]._class;
 660
 661             rgba_masks[0] = visuals[i].red_mask;
 662             rgba_masks[1] = visuals[i].green_mask;
 663             rgba_masks[2] = visuals[i].blue_mask;
 664             rgba_masks[3] = 0;
 665             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 666                             surface_type, config_attrs, rgba_masks);
 667
 668             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 669              * Otherwise it will only match a 32-bit RGBA visual.  On a
 670              * composited window manager on X11, this will make all of the
 671              * EGLConfigs with destination alpha get blended by the
 672              * compositor.  This is probably not what the application
 673              * wants... especially on drivers that only have 32-bit RGBA
 674              * EGLConfigs! */
 675             if (d.data->depth == 24) {
 676                rgba_masks[3] =
 677                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 678                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 679                                surface_type, config_attrs, rgba_masks);
 680             }
 681          }
 682       }
 683
 684       xcb_depth_next(&d);
 685    }
 686
 687    if (!_eglGetArraySize(disp->Configs)) {
 688       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 689       return EGL_FALSE;
 690    }
 691
 692    return EGL_TRUE;
 693 }
 694
 695 static EGLBoolean
 696 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 697                  _EGLSurface *draw, xcb_xfixes_region_t region)
 698 {
 699    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 700    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 701    enum xcb_dri2_attachment_t render_attachment;
 702    xcb_dri2_copy_region_cookie_t cookie;
 703
 704    /* No-op for a pixmap or pbuffer surface */
 705    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 706       return EGL_TRUE;
 707
 708    if (dri2_dpy->flush)
 709       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 710
 711    if (dri2_surf->have_fake_front)
 712       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 713    else
 714       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 715
 716    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 717                                            dri2_surf->drawable,
 718                                            region,
 719                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 720                                            render_attachment);
 721    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 722
 723    return EGL_TRUE;
 724 }
 725
 726 static int64_t
 727 dri2_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 728                       int64_t msc, int64_t divisor, int64_t remainder)
 729 {
 730    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 731    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 732    uint32_t msc_hi = msc >> 32;
 733    uint32_t msc_lo = msc & 0xffffffff;
 734    uint32_t divisor_hi = divisor >> 32;
 735    uint32_t divisor_lo = divisor & 0xffffffff;
 736    uint32_t remainder_hi = remainder >> 32;
 737    uint32_t remainder_lo = remainder & 0xffffffff;
 738    xcb_dri2_swap_buffers_cookie_t cookie;
 739    xcb_dri2_swap_buffers_reply_t *reply;
 740    int64_t swap_count = -1;
 741
 742    /* No-op for a pixmap or pbuffer surface */
 743    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 744       return 0;
 745
 746    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 747       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 748
 749    if (dri2_dpy->flush)
 750       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 751
 752    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 753                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 754
 755    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 756
 757    if (reply) {
 758       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 759       free(reply);
 760    }
 761
 762    /* Since we aren't watching for the server's invalidate events like we're
 763     * supposed to (due to XCB providing no mechanism for filtering the events
 764     * the way xlib does), and SwapBuffers is a common cause of invalidate
 765     * events, just shove one down to the driver, even though we haven't told
 766     * the driver that we're the kind of loader that provides reliable
 767     * invalidate events.  This causes the driver to request buffers again at
 768     * its next draw, so that we get the correct buffers if a pageflip
 769     * happened.  The driver should still be using the viewport hack to catch
 770     * window resizes.
 771     */
 772    if (dri2_dpy->flush &&
 773        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 774       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 775
 776    return swap_count;
 777 }
 778
 779 static EGLBoolean
 780 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 781 {
 782    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 783    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 784
 785    if (dri2_dpy->dri2) {
 786       return dri2_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 787    } else {
 788       assert(dri2_dpy->swrast);
 789
 790       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 791       return EGL_TRUE;
 792    }
 793 }
 794
 795 static EGLBoolean
 796 dri2_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 797                          EGLint numRects, const EGLint *rects)
 798 {
 799    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 800    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 801    EGLBoolean ret;
 802    xcb_xfixes_region_t region;
 803    xcb_rectangle_t rectangles[16];
 804    int i;
 805
 806    if (numRects > (int)ARRAY_SIZE(rectangles))
 807       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 808
 809    for (i = 0; i < numRects; i++) {
 810       rectangles[i].x = rects[i * 4];
 811       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 812       rectangles[i].width = rects[i * 4 + 2];
 813       rectangles[i].height = rects[i * 4 + 3];
 814    }
 815
 816    region = xcb_generate_id(dri2_dpy->conn);
 817    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 818    ret = dri2_copy_region(drv, disp, draw, region);
 819    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 820
 821    return ret;
 822 }
 823
 824 static EGLBoolean
 825 dri2_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 826                      EGLint x, EGLint y, EGLint width, EGLint height)
 827 {
 828    const EGLint rect[4] = { x, y, width, height };
 829
 830    if (x < 0 || y < 0 || width < 0 || height < 0)
 831       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 832
 833    return dri2_swap_buffers_region(drv, disp, draw, 1, rect);
 834 }
 835
 836 static EGLBoolean
 837 dri2_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf, EGLint interval)
 838 {
 839    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 840    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 841
 842    if (interval > surf->Config->MaxSwapInterval)
 843       interval = surf->Config->MaxSwapInterval;
 844    else if (interval < surf->Config->MinSwapInterval)
 845       interval = surf->Config->MinSwapInterval;
 846
 847    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 848       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 849
 850    surf->SwapInterval = interval;
 851
 852    return EGL_TRUE;
 853 }
 854
 855 static EGLBoolean
 856 dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 857                   EGLNativePixmapType native_target)
 858 {
 859    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 860    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 861    xcb_gcontext_t gc;
 862    xcb_pixmap_t target = (uintptr_t )native_target;
 863
 864    (void) drv;
 865
 866    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 867
 868    gc = xcb_generate_id(dri2_dpy->conn);
 869    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 870    xcb_copy_area(dri2_dpy->conn,
 871                   dri2_surf->drawable,
 872                   target,
 873                   gc,
 874                   0, 0,
 875                   0, 0,
 876                   dri2_surf->base.Width,
 877                   dri2_surf->base.Height);
 878    xcb_free_gc(dri2_dpy->conn, gc);
 879
 880    return EGL_TRUE;
 881 }
 882
 883 static _EGLImage *
 884 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 885                              EGLClientBuffer buffer, const EGLint *attr_list)
 886 {
 887    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 888    struct dri2_egl_image *dri2_img;
 889    unsigned int attachments[1];
 890    xcb_drawable_t drawable;
 891    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 892    xcb_dri2_get_buffers_reply_t *buffers_reply;
 893    xcb_dri2_dri2_buffer_t *buffers;
 894    xcb_get_geometry_cookie_t geometry_cookie;
 895    xcb_get_geometry_reply_t *geometry_reply;
 896    xcb_generic_error_t *error;
 897    int stride, format;
 898
 899    (void) ctx;
 900
 901    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 902    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 903    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 904    buffers_cookie =
 905       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 906                                       drawable, 1, 1, attachments);
 907    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 908    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 909                                                buffers_cookie, NULL);
 910    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 911    if (buffers == NULL) {
 912       return NULL;
 913    }
 914
 915    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 916                                             geometry_cookie, &error);
 917    if (geometry_reply == NULL || error != NULL) {
 918       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 919       free(error);
 920       free(buffers_reply);
 921       return NULL;
 922    }
 923
 924    switch (geometry_reply->depth) {
 925    case 16:
 926       format = __DRI_IMAGE_FORMAT_RGB565;
 927       break;
 928    case 24:
 929       format = __DRI_IMAGE_FORMAT_XRGB8888;
 930       break;
 931    case 32:
 932       format = __DRI_IMAGE_FORMAT_ARGB8888;
 933       break;
 934    default:
 935       _eglError(EGL_BAD_PARAMETER,
 936                 "dri2_create_image_khr: unsupported pixmap depth");
 937       free(buffers_reply);
 938       free(geometry_reply);
 939       return NULL;
 940    }
 941
 942    dri2_img = malloc(sizeof *dri2_img);
 943    if (!dri2_img) {
 944       free(buffers_reply);
 945       free(geometry_reply);
 946       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 947       return EGL_NO_IMAGE_KHR;
 948    }
 949
 950    if (!_eglInitImage(&dri2_img->base, disp)) {
 951       free(buffers_reply);
 952       free(geometry_reply);
 953       free(dri2_img);
 954       return EGL_NO_IMAGE_KHR;
 955    }
 956
 957    stride = buffers[0].pitch / buffers[0].cpp;
 958    dri2_img->dri_image =
 959       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 960                                            buffers_reply->width,
 961                                            buffers_reply->height,
 962                                            format,
 963                                            buffers[0].name,
 964                                            stride,
 965                                            dri2_img);
 966
 967    free(buffers_reply);
 968    free(geometry_reply);
 969
 970    return &dri2_img->base;
 971 }
 972
 973 static _EGLImage *
 974 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 975                           _EGLContext *ctx, EGLenum target,
 976                           EGLClientBuffer buffer, const EGLint *attr_list)
 977 {
 978    (void) drv;
 979
 980    switch (target) {
 981    case EGL_NATIVE_PIXMAP_KHR:
 982       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 983    default:
 984       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 985    }
 986 }
 987
 988 static EGLBoolean
 989 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
 990 {
 991    struct dri2_egl_display *dri2_dpy;
 992
 993    drv->API.CreateWindowSurface = dri2_create_window_surface;
 994    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
 995    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 996    drv->API.DestroySurface = dri2_destroy_surface;
 997    drv->API.SwapBuffers = dri2_swap_buffers;
 998    drv->API.CopyBuffers = dri2_copy_buffers;
 999
1000    drv->API.SwapBuffersRegionNOK = NULL;
1001    drv->API.CreateImageKHR  = NULL;
1002    drv->API.DestroyImageKHR = NULL;
1003    drv->API.CreateDRMImageMESA = NULL;
1004    drv->API.ExportDRMImageMESA = NULL;
1005
1006    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1007    if (!dri2_dpy)
1008       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1009
1010    disp->DriverData = (void *) dri2_dpy;
1011    if (disp->PlatformDisplay == NULL) {
1012       dri2_dpy->conn = xcb_connect(0, 0);
1013    } else {
1014       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1015    }
1016
1017    if (xcb_connection_has_error(dri2_dpy->conn)) {
1018       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1019       goto cleanup_dpy;
1020    }
1021
1022    if (!dri2_load_driver_swrast(disp))
1023       goto cleanup_conn;
1024
1025    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1026    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
1027    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1028    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1029    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1030
1031    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1032    dri2_dpy->extensions[1] = NULL;
1033    dri2_dpy->extensions[2] = NULL;
1034
1035    if (!dri2_create_screen(disp))
1036       goto cleanup_driver;
1037
1038    if (dri2_dpy->conn) {
1039       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
1040          goto cleanup_configs;
1041    }
1042
1043    /* we're supporting EGL 1.4 */
1044    disp->VersionMajor = 1;
1045    disp->VersionMinor = 4;
1046
1047    return EGL_TRUE;
1048
1049  cleanup_configs:
1050    _eglCleanupDisplay(disp);
1051    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1052  cleanup_driver:
1053    dlclose(dri2_dpy->driver);
1054  cleanup_conn:
1055    if (disp->PlatformDisplay == NULL)
1056       xcb_disconnect(dri2_dpy->conn);
1057  cleanup_dpy:
1058    free(dri2_dpy);
1059
1060    return EGL_FALSE;
1061 }
1062
1063 static void
1064 dri2_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1065 {
1066    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1067    int arbitrary_max_interval = 1000;
1068
1069    /* default behavior for no SwapBuffers support: no vblank syncing
1070     * either.
1071     */
1072    dri2_dpy->min_swap_interval = 0;
1073    dri2_dpy->max_swap_interval = 0;
1074
1075    if (!dri2_dpy->swap_available)
1076       return;
1077
1078    /* If we do have swapbuffers, then we can support pretty much any swap
1079     * interval, but we allow driconf to override applications.
1080     */
1081    if (dri2_dpy->config)
1082       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1083                                      "vblank_mode", &vblank_mode);
1084    switch (vblank_mode) {
1085    case DRI_CONF_VBLANK_NEVER:
1086       dri2_dpy->min_swap_interval = 0;
1087       dri2_dpy->max_swap_interval = 0;
1088       dri2_dpy->default_swap_interval = 0;
1089       break;
1090    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1091       dri2_dpy->min_swap_interval = 1;
1092       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1093       dri2_dpy->default_swap_interval = 1;
1094       break;
1095    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1096       dri2_dpy->min_swap_interval = 0;
1097       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1098       dri2_dpy->default_swap_interval = 0;
1099       break;
1100    default:
1101    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1102       dri2_dpy->min_swap_interval = 0;
1103       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1104       dri2_dpy->default_swap_interval = 1;
1105       break;
1106    }
1107 }
1108
1109 static EGLBoolean
1110 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1111 {
1112    struct dri2_egl_display *dri2_dpy;
1113
1114    drv->API.CreateWindowSurface = dri2_create_window_surface;
1115    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
1116    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
1117    drv->API.DestroySurface = dri2_destroy_surface;
1118    drv->API.SwapBuffers = dri2_swap_buffers;
1119    drv->API.CopyBuffers = dri2_copy_buffers;
1120    drv->API.CreateImageKHR = dri2_x11_create_image_khr;
1121    drv->API.SwapBuffersRegionNOK = dri2_swap_buffers_region;
1122    drv->API.PostSubBufferNV = dri2_post_sub_buffer;
1123    drv->API.SwapInterval = dri2_swap_interval;
1124
1125    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1126    if (!dri2_dpy)
1127       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1128
1129    disp->DriverData = (void *) dri2_dpy;
1130    if (disp->PlatformDisplay == NULL) {
1131       dri2_dpy->conn = xcb_connect(0, 0);
1132    } else {
1133       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1134    }
1135
1136    if (xcb_connection_has_error(dri2_dpy->conn)) {
1137       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1138       goto cleanup_dpy;
1139    }
1140
1141    if (dri2_dpy->conn) {
1142       if (!dri2_connect(dri2_dpy))
1143          goto cleanup_conn;
1144    }
1145
1146    if (!dri2_load_driver(disp))
1147       goto cleanup_conn;
1148
1149 #ifdef O_CLOEXEC
1150    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1151    if (dri2_dpy->fd == -1 && errno == EINVAL)
1152 #endif
1153    {
1154       dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR);
1155       if (dri2_dpy->fd != -1)
1156          fcntl(dri2_dpy->fd, F_SETFD, fcntl(dri2_dpy->fd, F_GETFD) |
1157             FD_CLOEXEC);
1158    }
1159    if (dri2_dpy->fd == -1) {
1160       _eglLog(_EGL_WARNING,
1161               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1162               strerror(errno));
1163       goto cleanup_driver;
1164    }
1165
1166    if (dri2_dpy->conn) {
1167       if (!dri2_authenticate(disp))
1168          goto cleanup_fd;
1169    }
1170
1171    if (dri2_dpy->dri2_minor >= 1) {
1172       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1173       dri2_dpy->dri2_loader_extension.base.version = 3;
1174       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1175       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1176       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1177          dri2_get_buffers_with_format;
1178    } else {
1179       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1180       dri2_dpy->dri2_loader_extension.base.version = 2;
1181       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1182       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1183       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1184    }
1185
1186    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1187    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1188    dri2_dpy->extensions[2] = NULL;
1189
1190    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1191    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1192
1193    if (!dri2_create_screen(disp))
1194       goto cleanup_fd;
1195
1196    dri2_setup_swap_interval(dri2_dpy);
1197
1198    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1199    disp->Extensions.NOK_swap_region = EGL_TRUE;
1200    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1201    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1202
1203 #ifdef HAVE_WAYLAND_PLATFORM
1204    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1205 #endif
1206
1207    if (dri2_dpy->conn) {
1208       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
1209          goto cleanup_configs;
1210    }
1211
1212    dri2_dpy->authenticate = dri2_x11_authenticate;
1213
1214    /* we're supporting EGL 1.4 */
1215    disp->VersionMajor = 1;
1216    disp->VersionMinor = 4;
1217
1218    return EGL_TRUE;
1219
1220  cleanup_configs:
1221    _eglCleanupDisplay(disp);
1222    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1223  cleanup_fd:
1224    close(dri2_dpy->fd);
1225  cleanup_driver:
1226    dlclose(dri2_dpy->driver);
1227  cleanup_conn:
1228    if (disp->PlatformDisplay == NULL)
1229       xcb_disconnect(dri2_dpy->conn);
1230  cleanup_dpy:
1231    free(dri2_dpy);
1232
1233    return EGL_FALSE;
1234 }
1235
1236 EGLBoolean
1237 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1238 {
1239    EGLBoolean initialized = EGL_TRUE;
1240
1241    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1242
1243    if (x11_dri2_accel) {
1244       if (!dri2_initialize_x11_dri2(drv, disp)) {
1245          initialized = dri2_initialize_x11_swrast(drv, disp);
1246       }
1247    } else {
1248       initialized = dri2_initialize_x11_swrast(drv, disp);
1249    }
1250
1251    return initialized;
1252 }
1253