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 <stdbool.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <stdio.h>
  32 #include <limits.h>
  33 #include <dlfcn.h>
  34 #include <fcntl.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #ifdef HAVE_LIBDRM
  38 #include <xf86drm.h>
  39 #endif
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42
  43 #include "egl_dri2.h"
  44 #include "egl_dri2_fallbacks.h"
  45
  46 static EGLBoolean
  47 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  48                        EGLint interval);
  49
  50 static void
  51 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  52                      struct dri2_egl_surface * dri2_surf,
  53                      int depth)
  54 {
  55    uint32_t           mask;
  56    const uint32_t     function = GXcopy;
  57    uint32_t           valgc[2];
  58
  59    /* create GC's */
  60    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  61    mask = XCB_GC_FUNCTION;
  62    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  63
  64    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  65    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  66    valgc[0] = function;
  67    valgc[1] = False;
  68    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  69    dri2_surf->depth = depth;
  70    switch (depth) {
  71       case 32:
  72       case 24:
  73          dri2_surf->bytes_per_pixel = 4;
  74          break;
  75       case 16:
  76          dri2_surf->bytes_per_pixel = 2;
  77          break;
  78       case 8:
  79          dri2_surf->bytes_per_pixel = 1;
  80          break;
  81       case 0:
  82          dri2_surf->bytes_per_pixel = 0;
  83          break;
  84       default:
  85          _eglLog(_EGL_WARNING, "unsupported depth %d", depth);
  86    }
  87 }
  88
  89 static void
  90 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  91                       struct dri2_egl_surface * dri2_surf)
  92 {
  93    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  94    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  95 }
  96
  97 static void
  98 swrastGetDrawableInfo(__DRIdrawable * draw,
  99                       int *x, int *y, int *w, int *h,
 100                       void *loaderPrivate)
 101 {
 102    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 103    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 104
 105    xcb_get_geometry_cookie_t cookie;
 106    xcb_get_geometry_reply_t *reply;
 107    xcb_generic_error_t *error;
 108
 109    *w = *h = 0;
 110    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 111    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 112    if (reply == NULL)
 113       return;
 114
 115    if (error != NULL) {
 116       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 117       free(error);
 118    } else {
 119       *w = reply->width;
 120       *h = reply->height;
 121    }
 122    free(reply);
 123 }
 124
 125 static void
 126 swrastPutImage(__DRIdrawable * draw, int op,
 127                int x, int y, int w, int h,
 128                char *data, void *loaderPrivate)
 129 {
 130    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 131    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 132
 133    xcb_gcontext_t gc;
 134
 135    switch (op) {
 136    case __DRI_SWRAST_IMAGE_OP_DRAW:
 137       gc = dri2_surf->gc;
 138       break;
 139    case __DRI_SWRAST_IMAGE_OP_SWAP:
 140       gc = dri2_surf->swapgc;
 141       break;
 142    default:
 143       return;
 144    }
 145
 146    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 147                  gc, w, h, x, y, 0, dri2_surf->depth,
 148                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 149 }
 150
 151 static void
 152 swrastGetImage(__DRIdrawable * read,
 153                int x, int y, int w, int h,
 154                char *data, void *loaderPrivate)
 155 {
 156    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 157    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 158
 159    xcb_get_image_cookie_t cookie;
 160    xcb_get_image_reply_t *reply;
 161    xcb_generic_error_t *error;
 162
 163    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 164                            dri2_surf->drawable, x, y, w, h, ~0);
 165    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 166    if (reply == NULL)
 167       return;
 168
 169    if (error != NULL) {
 170       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 171       free(error);
 172    } else {
 173       uint32_t bytes = xcb_get_image_data_length(reply);
 174       uint8_t *idata = xcb_get_image_data(reply);
 175       memcpy(data, idata, bytes);
 176    }
 177    free(reply);
 178 }
 179
 180
 181 /**
 182  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 183  */
 184 static _EGLSurface *
 185 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 186                         _EGLConfig *conf, EGLNativeWindowType native_window,
 187                         const EGLint *attrib_list)
 188 {
 189    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 190    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 191    struct dri2_egl_surface *dri2_surf;
 192    xcb_get_geometry_cookie_t cookie;
 193    xcb_get_geometry_reply_t *reply;
 194    xcb_screen_iterator_t s;
 195    xcb_generic_error_t *error;
 196    xcb_drawable_t window = (uintptr_t )native_window;
 197
 198    (void) drv;
 199
 200    dri2_surf = malloc(sizeof *dri2_surf);
 201    if (!dri2_surf) {
 202       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 203       return NULL;
 204    }
 205
 206    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 207       goto cleanup_surf;
 208
 209    dri2_surf->region = XCB_NONE;
 210    if (type == EGL_PBUFFER_BIT) {
 211       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 212       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 213       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 214                         dri2_surf->drawable, s.data->root,
 215                         dri2_surf->base.Width, dri2_surf->base.Height);
 216    } else {
 217       dri2_surf->drawable = window;
 218    }
 219
 220    if (dri2_dpy->dri2) {
 221       dri2_surf->dri_drawable =
 222          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 223                                                type == EGL_WINDOW_BIT ?
 224                                                dri2_conf->dri_double_config :
 225                                                dri2_conf->dri_single_config,
 226                                                dri2_surf);
 227    } else {
 228       assert(dri2_dpy->swrast);
 229       dri2_surf->dri_drawable =
 230          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 231                                                  dri2_conf->dri_double_config,
 232                                                  dri2_surf);
 233    }
 234
 235    if (dri2_surf->dri_drawable == NULL) {
 236       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 237       goto cleanup_pixmap;
 238    }
 239
 240    if (dri2_dpy->dri2) {
 241       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 242    } else {
 243       swrastCreateDrawable(dri2_dpy, dri2_surf, _eglGetConfigKey(conf, EGL_BUFFER_SIZE));
 244    }
 245
 246    if (type != EGL_PBUFFER_BIT) {
 247       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 248       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 249       if (reply == NULL || error != NULL) {
 250          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 251          free(error);
 252          goto cleanup_dri_drawable;
 253       }
 254
 255       dri2_surf->base.Width = reply->width;
 256       dri2_surf->base.Height = reply->height;
 257       free(reply);
 258    }
 259
 260    /* we always copy the back buffer to front */
 261    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 262
 263    return &dri2_surf->base;
 264
 265  cleanup_dri_drawable:
 266    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 267  cleanup_pixmap:
 268    if (type == EGL_PBUFFER_BIT)
 269       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 270  cleanup_surf:
 271    free(dri2_surf);
 272
 273    return NULL;
 274 }
 275
 276 /**
 277  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 278  */
 279 static _EGLSurface *
 280 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 281                                _EGLConfig *conf, EGLNativeWindowType window,
 282                                const EGLint *attrib_list)
 283 {
 284    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 285    _EGLSurface *surf;
 286
 287    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 288                                   window, attrib_list);
 289    if (surf != NULL) {
 290       /* When we first create the DRI2 drawable, its swap interval on the
 291        * server side is 1.
 292        */
 293       surf->SwapInterval = 1;
 294
 295       /* Override that with a driconf-set value. */
 296       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 297    }
 298
 299    return surf;
 300 }
 301
 302 static _EGLSurface *
 303 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 304                                _EGLConfig *conf, EGLNativePixmapType pixmap,
 305                                const EGLint *attrib_list)
 306 {
 307    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 308                                   pixmap, attrib_list);
 309 }
 310
 311 static _EGLSurface *
 312 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 313                                 _EGLConfig *conf, const EGLint *attrib_list)
 314 {
 315    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 316                                   XCB_WINDOW_NONE, attrib_list);
 317 }
 318
 319 static EGLBoolean
 320 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 321 {
 322    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 323    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 324
 325    (void) drv;
 326
 327    if (!_eglPutSurface(surf))
 328       return EGL_TRUE;
 329
 330    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 331
 332    if (dri2_dpy->dri2) {
 333       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 334    } else {
 335       assert(dri2_dpy->swrast);
 336       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 337    }
 338
 339    if (surf->Type == EGL_PBUFFER_BIT)
 340       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 341
 342    free(surf);
 343
 344    return EGL_TRUE;
 345 }
 346
 347 /**
 348  * Process list of buffer received from the server
 349  *
 350  * Processes the list of buffers received in a reply from the server to either
 351  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 352  */
 353 static void
 354 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 355                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 356 {
 357    struct dri2_egl_display *dri2_dpy =
 358       dri2_egl_display(dri2_surf->base.Resource.Display);
 359    xcb_rectangle_t rectangle;
 360    unsigned i;
 361
 362    dri2_surf->buffer_count = count;
 363    dri2_surf->have_fake_front = 0;
 364
 365    /* This assumes the DRI2 buffer attachment tokens matches the
 366     * __DRIbuffer tokens. */
 367    for (i = 0; i < count; i++) {
 368       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 369       dri2_surf->buffers[i].name = buffers[i].name;
 370       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 371       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 372       dri2_surf->buffers[i].flags = buffers[i].flags;
 373
 374       /* We only use the DRI drivers single buffer configs.  This
 375        * means that if we try to render to a window, DRI2 will give us
 376        * the fake front buffer, which we'll use as a back buffer.
 377        * Note that EGL doesn't require that several clients rendering
 378        * to the same window must see the same aux buffers. */
 379       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 380          dri2_surf->have_fake_front = 1;
 381    }
 382
 383    if (dri2_surf->region != XCB_NONE)
 384       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 385
 386    rectangle.x = 0;
 387    rectangle.y = 0;
 388    rectangle.width = dri2_surf->base.Width;
 389    rectangle.height = dri2_surf->base.Height;
 390    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 391    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 392 }
 393
 394 static __DRIbuffer *
 395 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 396                      int *width, int *height,
 397                      unsigned int *attachments, int count,
 398                      int *out_count, void *loaderPrivate)
 399 {
 400    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 401    struct dri2_egl_display *dri2_dpy =
 402       dri2_egl_display(dri2_surf->base.Resource.Display);
 403    xcb_dri2_dri2_buffer_t *buffers;
 404    xcb_dri2_get_buffers_reply_t *reply;
 405    xcb_dri2_get_buffers_cookie_t cookie;
 406
 407    (void) driDrawable;
 408
 409    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 410                                             dri2_surf->drawable,
 411                                             count, count, attachments);
 412    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 413    buffers = xcb_dri2_get_buffers_buffers (reply);
 414    if (buffers == NULL)
 415       return NULL;
 416
 417    *out_count = reply->count;
 418    dri2_surf->base.Width = *width = reply->width;
 419    dri2_surf->base.Height = *height = reply->height;
 420    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 421
 422    free(reply);
 423
 424    return dri2_surf->buffers;
 425 }
 426
 427 static __DRIbuffer *
 428 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 429                                  int *width, int *height,
 430                                  unsigned int *attachments, int count,
 431                                  int *out_count, void *loaderPrivate)
 432 {
 433    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 434    struct dri2_egl_display *dri2_dpy =
 435       dri2_egl_display(dri2_surf->base.Resource.Display);
 436    xcb_dri2_dri2_buffer_t *buffers;
 437    xcb_dri2_get_buffers_with_format_reply_t *reply;
 438    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 439    xcb_dri2_attach_format_t *format_attachments;
 440
 441    (void) driDrawable;
 442
 443    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 444    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 445                                                         dri2_surf->drawable,
 446                                                         count, count,
 447                                                         format_attachments);
 448
 449    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 450                                                    cookie, NULL);
 451    if (reply == NULL)
 452       return NULL;
 453
 454    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 455    dri2_surf->base.Width = *width = reply->width;
 456    dri2_surf->base.Height = *height = reply->height;
 457    *out_count = reply->count;
 458    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 459
 460    free(reply);
 461
 462    return dri2_surf->buffers;
 463 }
 464
 465 static void
 466 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 467 {
 468    (void) driDrawable;
 469
 470    /* FIXME: Does EGL support front buffer rendering at all? */
 471
 472 #if 0
 473    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 474
 475    dri2WaitGL(dri2_surf);
 476 #else
 477    (void) loaderPrivate;
 478 #endif
 479 }
 480
 481 static char *
 482 dri2_x11_strndup(const char *s, int length)
 483 {
 484    char *d;
 485
 486    d = malloc(length + 1);
 487    if (d == NULL)
 488       return NULL;
 489
 490    memcpy(d, s, length);
 491    d[length] = '\0';
 492
 493    return d;
 494 }
 495
 496 static EGLBoolean
 497 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 498 {
 499    xcb_xfixes_query_version_reply_t *xfixes_query;
 500    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 501    xcb_dri2_query_version_reply_t *dri2_query;
 502    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 503    xcb_dri2_connect_reply_t *connect;
 504    xcb_dri2_connect_cookie_t connect_cookie;
 505    xcb_generic_error_t *error;
 506    xcb_screen_iterator_t s;
 507    char *driver_name, *device_name;
 508    const xcb_query_extension_reply_t *extension;
 509
 510    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 511    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 512
 513    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 514    if (!(extension && extension->present))
 515       return EGL_FALSE;
 516
 517    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 518    if (!(extension && extension->present))
 519       return EGL_FALSE;
 520
 521    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 522                                                   XCB_XFIXES_MAJOR_VERSION,
 523                                                   XCB_XFIXES_MINOR_VERSION);
 524
 525    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 526                                                XCB_DRI2_MAJOR_VERSION,
 527                                                XCB_DRI2_MINOR_VERSION);
 528
 529    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 530    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 531                                                 s.data->root,
 532                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 533
 534    xfixes_query =
 535       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 536                                       xfixes_query_cookie, &error);
 537    if (xfixes_query == NULL ||
 538        error != NULL || xfixes_query->major_version < 2) {
 539       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 540       free(error);
 541       return EGL_FALSE;
 542    }
 543    free(xfixes_query);
 544
 545    dri2_query =
 546       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 547    if (dri2_query == NULL || error != NULL) {
 548       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 549       free(error);
 550       return EGL_FALSE;
 551    }
 552    dri2_dpy->dri2_major = dri2_query->major_version;
 553    dri2_dpy->dri2_minor = dri2_query->minor_version;
 554    free(dri2_query);
 555
 556    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 557    if (connect == NULL ||
 558        connect->driver_name_length + connect->device_name_length == 0) {
 559       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 560       return EGL_FALSE;
 561    }
 562
 563    driver_name = xcb_dri2_connect_driver_name (connect);
 564    dri2_dpy->driver_name =
 565       dri2_x11_strndup(driver_name,
 566                        xcb_dri2_connect_driver_name_length(connect));
 567
 568    device_name = xcb_dri2_connect_device_name (connect);
 569
 570    dri2_dpy->device_name =
 571       dri2_x11_strndup(device_name,
 572                        xcb_dri2_connect_device_name_length(connect));
 573
 574    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 575       free(dri2_dpy->device_name);
 576       free(dri2_dpy->driver_name);
 577       free(connect);
 578       return EGL_FALSE;
 579    }
 580    free(connect);
 581
 582    return EGL_TRUE;
 583 }
 584
 585 static int
 586 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 587 {
 588    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 589    xcb_dri2_authenticate_reply_t *authenticate;
 590    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 591    xcb_screen_iterator_t s;
 592    int ret = 0;
 593
 594    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 595    authenticate_cookie =
 596       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, id);
 597    authenticate =
 598       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 599
 600    if (authenticate == NULL || !authenticate->authenticated)
 601       ret = -1;
 602
 603    free(authenticate);
 604
 605    return ret;
 606 }
 607
 608 static EGLBoolean
 609 dri2_x11_local_authenticate(_EGLDisplay *disp)
 610 {
 611 #ifdef HAVE_LIBDRM
 612    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 613    drm_magic_t magic;
 614
 615    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 616       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 617       return EGL_FALSE;
 618    }
 619
 620    if (dri2_x11_authenticate(disp, magic) < 0) {
 621       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 622       return EGL_FALSE;
 623    }
 624 #endif
 625    return EGL_TRUE;
 626 }
 627
 628 static EGLBoolean
 629 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 630                                  _EGLDisplay *disp)
 631 {
 632    xcb_screen_iterator_t s;
 633    xcb_depth_iterator_t d;
 634    xcb_visualtype_t *visuals;
 635    int i, j, id;
 636    unsigned int rgba_masks[4];
 637    EGLint surface_type;
 638    EGLint config_attrs[] = {
 639            EGL_NATIVE_VISUAL_ID,   0,
 640            EGL_NATIVE_VISUAL_TYPE, 0,
 641            EGL_NONE
 642    };
 643
 644    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 645    d = xcb_screen_allowed_depths_iterator(s.data);
 646    id = 1;
 647
 648    surface_type =
 649       EGL_WINDOW_BIT |
 650       EGL_PIXMAP_BIT |
 651       EGL_PBUFFER_BIT |
 652       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 653
 654    while (d.rem > 0) {
 655       EGLBoolean class_added[6] = { 0, };
 656
 657       visuals = xcb_depth_visuals(d.data);
 658       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 659          if (class_added[visuals[i]._class])
 660             continue;
 661
 662          class_added[visuals[i]._class] = EGL_TRUE;
 663          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 664             config_attrs[1] = visuals[i].visual_id;
 665             config_attrs[3] = visuals[i]._class;
 666
 667             rgba_masks[0] = visuals[i].red_mask;
 668             rgba_masks[1] = visuals[i].green_mask;
 669             rgba_masks[2] = visuals[i].blue_mask;
 670             rgba_masks[3] = 0;
 671             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 672                             surface_type, config_attrs, rgba_masks);
 673
 674             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 675              * Otherwise it will only match a 32-bit RGBA visual.  On a
 676              * composited window manager on X11, this will make all of the
 677              * EGLConfigs with destination alpha get blended by the
 678              * compositor.  This is probably not what the application
 679              * wants... especially on drivers that only have 32-bit RGBA
 680              * EGLConfigs! */
 681             if (d.data->depth == 24) {
 682                rgba_masks[3] =
 683                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 684                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 685                                surface_type, config_attrs, rgba_masks);
 686             }
 687          }
 688       }
 689
 690       xcb_depth_next(&d);
 691    }
 692
 693    if (!_eglGetArraySize(disp->Configs)) {
 694       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 695       return EGL_FALSE;
 696    }
 697
 698    return EGL_TRUE;
 699 }
 700
 701 static EGLBoolean
 702 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 703                  _EGLSurface *draw, xcb_xfixes_region_t region)
 704 {
 705    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 706    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 707    enum xcb_dri2_attachment_t render_attachment;
 708    xcb_dri2_copy_region_cookie_t cookie;
 709
 710    /* No-op for a pixmap or pbuffer surface */
 711    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 712       return EGL_TRUE;
 713
 714    if (dri2_dpy->flush)
 715       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 716
 717    if (dri2_surf->have_fake_front)
 718       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 719    else
 720       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 721
 722    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 723                                            dri2_surf->drawable,
 724                                            region,
 725                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 726                                            render_attachment);
 727    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 728
 729    return EGL_TRUE;
 730 }
 731
 732 static int64_t
 733 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 734                           int64_t msc, int64_t divisor, int64_t remainder)
 735 {
 736    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 737    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 738    uint32_t msc_hi = msc >> 32;
 739    uint32_t msc_lo = msc & 0xffffffff;
 740    uint32_t divisor_hi = divisor >> 32;
 741    uint32_t divisor_lo = divisor & 0xffffffff;
 742    uint32_t remainder_hi = remainder >> 32;
 743    uint32_t remainder_lo = remainder & 0xffffffff;
 744    xcb_dri2_swap_buffers_cookie_t cookie;
 745    xcb_dri2_swap_buffers_reply_t *reply;
 746    int64_t swap_count = -1;
 747
 748    /* No-op for a pixmap or pbuffer surface */
 749    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 750       return 0;
 751
 752    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 753       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 754
 755    if (dri2_dpy->flush)
 756       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 757
 758    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 759                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 760
 761    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 762
 763    if (reply) {
 764       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 765       free(reply);
 766    }
 767
 768    /* Since we aren't watching for the server's invalidate events like we're
 769     * supposed to (due to XCB providing no mechanism for filtering the events
 770     * the way xlib does), and SwapBuffers is a common cause of invalidate
 771     * events, just shove one down to the driver, even though we haven't told
 772     * the driver that we're the kind of loader that provides reliable
 773     * invalidate events.  This causes the driver to request buffers again at
 774     * its next draw, so that we get the correct buffers if a pageflip
 775     * happened.  The driver should still be using the viewport hack to catch
 776     * window resizes.
 777     */
 778    if (dri2_dpy->flush &&
 779        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 780       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 781
 782    return swap_count;
 783 }
 784
 785 static EGLBoolean
 786 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 787 {
 788    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 789    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 790
 791    if (dri2_dpy->dri2) {
 792       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 793    } else {
 794       assert(dri2_dpy->swrast);
 795
 796       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 797       return EGL_TRUE;
 798    }
 799 }
 800
 801 static EGLBoolean
 802 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 803                              _EGLSurface *draw,
 804                              EGLint numRects, const EGLint *rects)
 805 {
 806    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 807    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 808    EGLBoolean ret;
 809    xcb_xfixes_region_t region;
 810    xcb_rectangle_t rectangles[16];
 811    int i;
 812
 813    if (numRects > (int)ARRAY_SIZE(rectangles))
 814       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 815
 816    for (i = 0; i < numRects; i++) {
 817       rectangles[i].x = rects[i * 4];
 818       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 819       rectangles[i].width = rects[i * 4 + 2];
 820       rectangles[i].height = rects[i * 4 + 3];
 821    }
 822
 823    region = xcb_generate_id(dri2_dpy->conn);
 824    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 825    ret = dri2_copy_region(drv, disp, draw, region);
 826    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 827
 828    return ret;
 829 }
 830
 831 static EGLBoolean
 832 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 833                      EGLint x, EGLint y, EGLint width, EGLint height)
 834 {
 835    const EGLint rect[4] = { x, y, width, height };
 836
 837    if (x < 0 || y < 0 || width < 0 || height < 0)
 838       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 839
 840    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 841 }
 842
 843 static EGLBoolean
 844 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 845                        EGLint interval)
 846 {
 847    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 848    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 849
 850    if (interval > surf->Config->MaxSwapInterval)
 851       interval = surf->Config->MaxSwapInterval;
 852    else if (interval < surf->Config->MinSwapInterval)
 853       interval = surf->Config->MinSwapInterval;
 854
 855    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 856       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 857
 858    surf->SwapInterval = interval;
 859
 860    return EGL_TRUE;
 861 }
 862
 863 static EGLBoolean
 864 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 865                       EGLNativePixmapType native_target)
 866 {
 867    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 868    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 869    xcb_gcontext_t gc;
 870    xcb_pixmap_t target = (uintptr_t )native_target;
 871
 872    (void) drv;
 873
 874    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 875
 876    gc = xcb_generate_id(dri2_dpy->conn);
 877    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 878    xcb_copy_area(dri2_dpy->conn,
 879                   dri2_surf->drawable,
 880                   target,
 881                   gc,
 882                   0, 0,
 883                   0, 0,
 884                   dri2_surf->base.Width,
 885                   dri2_surf->base.Height);
 886    xcb_free_gc(dri2_dpy->conn, gc);
 887
 888    return EGL_TRUE;
 889 }
 890
 891 static _EGLImage *
 892 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 893                              EGLClientBuffer buffer, const EGLint *attr_list)
 894 {
 895    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 896    struct dri2_egl_image *dri2_img;
 897    unsigned int attachments[1];
 898    xcb_drawable_t drawable;
 899    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 900    xcb_dri2_get_buffers_reply_t *buffers_reply;
 901    xcb_dri2_dri2_buffer_t *buffers;
 902    xcb_get_geometry_cookie_t geometry_cookie;
 903    xcb_get_geometry_reply_t *geometry_reply;
 904    xcb_generic_error_t *error;
 905    int stride, format;
 906
 907    (void) ctx;
 908
 909    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 910    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 911    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 912    buffers_cookie =
 913       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 914                                       drawable, 1, 1, attachments);
 915    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 916    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 917                                                buffers_cookie, NULL);
 918    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 919    if (buffers == NULL) {
 920       return NULL;
 921    }
 922
 923    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 924                                             geometry_cookie, &error);
 925    if (geometry_reply == NULL || error != NULL) {
 926       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 927       free(error);
 928       free(buffers_reply);
 929       return NULL;
 930    }
 931
 932    switch (geometry_reply->depth) {
 933    case 16:
 934       format = __DRI_IMAGE_FORMAT_RGB565;
 935       break;
 936    case 24:
 937       format = __DRI_IMAGE_FORMAT_XRGB8888;
 938       break;
 939    case 32:
 940       format = __DRI_IMAGE_FORMAT_ARGB8888;
 941       break;
 942    default:
 943       _eglError(EGL_BAD_PARAMETER,
 944                 "dri2_create_image_khr: unsupported pixmap depth");
 945       free(buffers_reply);
 946       free(geometry_reply);
 947       return NULL;
 948    }
 949
 950    dri2_img = malloc(sizeof *dri2_img);
 951    if (!dri2_img) {
 952       free(buffers_reply);
 953       free(geometry_reply);
 954       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 955       return EGL_NO_IMAGE_KHR;
 956    }
 957
 958    if (!_eglInitImage(&dri2_img->base, disp)) {
 959       free(buffers_reply);
 960       free(geometry_reply);
 961       free(dri2_img);
 962       return EGL_NO_IMAGE_KHR;
 963    }
 964
 965    stride = buffers[0].pitch / buffers[0].cpp;
 966    dri2_img->dri_image =
 967       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 968                                            buffers_reply->width,
 969                                            buffers_reply->height,
 970                                            format,
 971                                            buffers[0].name,
 972                                            stride,
 973                                            dri2_img);
 974
 975    free(buffers_reply);
 976    free(geometry_reply);
 977
 978    return &dri2_img->base;
 979 }
 980
 981 static _EGLImage *
 982 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 983                           _EGLContext *ctx, EGLenum target,
 984                           EGLClientBuffer buffer, const EGLint *attr_list)
 985 {
 986    (void) drv;
 987
 988    switch (target) {
 989    case EGL_NATIVE_PIXMAP_KHR:
 990       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 991    default:
 992       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 993    }
 994 }
 995
 996 static _EGLImage*
 997 dri2_x11_swrast_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 998                                  _EGLContext *ctx, EGLenum target,
 999                                  EGLClientBuffer buffer,
1000                                  const EGLint *attr_list)
1001 {
1002    return NULL;
1003 }
1004
1005 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1006    .authenticate = NULL,
1007    .create_window_surface = dri2_x11_create_window_surface,
1008    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1009    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1010    .destroy_surface = dri2_x11_destroy_surface,
1011    .create_image = dri2_x11_swrast_create_image_khr,
1012    .swap_interval = dri2_fallback_swap_interval,
1013    .swap_buffers = dri2_x11_swap_buffers,
1014    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1015    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1016    .copy_buffers = dri2_x11_copy_buffers,
1017    .query_buffer_age = dri2_fallback_query_buffer_age,
1018    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1019 };
1020
1021 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1022    .authenticate = dri2_x11_authenticate,
1023    .create_window_surface = dri2_x11_create_window_surface,
1024    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1025    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1026    .destroy_surface = dri2_x11_destroy_surface,
1027    .create_image = dri2_x11_create_image_khr,
1028    .swap_interval = dri2_x11_swap_interval,
1029    .swap_buffers = dri2_x11_swap_buffers,
1030    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1031    .swap_buffers_region = dri2_x11_swap_buffers_region,
1032    .post_sub_buffer = dri2_x11_post_sub_buffer,
1033    .copy_buffers = dri2_x11_copy_buffers,
1034    .query_buffer_age = dri2_fallback_query_buffer_age,
1035    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1036 };
1037
1038 static EGLBoolean
1039 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1040 {
1041    struct dri2_egl_display *dri2_dpy;
1042
1043    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1044    if (!dri2_dpy)
1045       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1046
1047    disp->DriverData = (void *) dri2_dpy;
1048    if (disp->PlatformDisplay == NULL) {
1049       dri2_dpy->conn = xcb_connect(0, 0);
1050       dri2_dpy->own_device = true;
1051    } else {
1052       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1053    }
1054
1055    if (xcb_connection_has_error(dri2_dpy->conn)) {
1056       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1057       goto cleanup_dpy;
1058    }
1059
1060    if (!dri2_load_driver_swrast(disp))
1061       goto cleanup_conn;
1062
1063    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1064    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
1065    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1066    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1067    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1068
1069    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1070    dri2_dpy->extensions[1] = NULL;
1071    dri2_dpy->extensions[2] = NULL;
1072
1073    if (!dri2_create_screen(disp))
1074       goto cleanup_driver;
1075
1076    if (dri2_dpy->conn) {
1077       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1078          goto cleanup_configs;
1079    }
1080
1081    /* we're supporting EGL 1.4 */
1082    disp->VersionMajor = 1;
1083    disp->VersionMinor = 4;
1084
1085    /* Fill vtbl last to prevent accidentally calling virtual function during
1086     * initialization.
1087     */
1088    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1089
1090    return EGL_TRUE;
1091
1092  cleanup_configs:
1093    _eglCleanupDisplay(disp);
1094    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1095  cleanup_driver:
1096    dlclose(dri2_dpy->driver);
1097  cleanup_conn:
1098    if (disp->PlatformDisplay == NULL)
1099       xcb_disconnect(dri2_dpy->conn);
1100  cleanup_dpy:
1101    free(dri2_dpy);
1102
1103    return EGL_FALSE;
1104 }
1105
1106 static void
1107 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1108 {
1109    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1110    int arbitrary_max_interval = 1000;
1111
1112    /* default behavior for no SwapBuffers support: no vblank syncing
1113     * either.
1114     */
1115    dri2_dpy->min_swap_interval = 0;
1116    dri2_dpy->max_swap_interval = 0;
1117
1118    if (!dri2_dpy->swap_available)
1119       return;
1120
1121    /* If we do have swapbuffers, then we can support pretty much any swap
1122     * interval, but we allow driconf to override applications.
1123     */
1124    if (dri2_dpy->config)
1125       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1126                                      "vblank_mode", &vblank_mode);
1127    switch (vblank_mode) {
1128    case DRI_CONF_VBLANK_NEVER:
1129       dri2_dpy->min_swap_interval = 0;
1130       dri2_dpy->max_swap_interval = 0;
1131       dri2_dpy->default_swap_interval = 0;
1132       break;
1133    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1134       dri2_dpy->min_swap_interval = 1;
1135       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1136       dri2_dpy->default_swap_interval = 1;
1137       break;
1138    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1139       dri2_dpy->min_swap_interval = 0;
1140       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1141       dri2_dpy->default_swap_interval = 0;
1142       break;
1143    default:
1144    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1145       dri2_dpy->min_swap_interval = 0;
1146       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1147       dri2_dpy->default_swap_interval = 1;
1148       break;
1149    }
1150 }
1151
1152 static EGLBoolean
1153 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1154 {
1155    struct dri2_egl_display *dri2_dpy;
1156
1157    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1158    if (!dri2_dpy)
1159       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1160
1161    disp->DriverData = (void *) dri2_dpy;
1162    if (disp->PlatformDisplay == NULL) {
1163       dri2_dpy->conn = xcb_connect(0, 0);
1164       dri2_dpy->own_device = true;
1165    } else {
1166       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1167    }
1168
1169    if (xcb_connection_has_error(dri2_dpy->conn)) {
1170       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1171       goto cleanup_dpy;
1172    }
1173
1174    if (dri2_dpy->conn) {
1175       if (!dri2_x11_connect(dri2_dpy))
1176          goto cleanup_conn;
1177    }
1178
1179    if (!dri2_load_driver(disp))
1180       goto cleanup_conn;
1181
1182 #ifdef O_CLOEXEC
1183    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1184    if (dri2_dpy->fd == -1 && errno == EINVAL)
1185 #endif
1186    {
1187       dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR);
1188       if (dri2_dpy->fd != -1)
1189          fcntl(dri2_dpy->fd, F_SETFD, fcntl(dri2_dpy->fd, F_GETFD) |
1190             FD_CLOEXEC);
1191    }
1192    if (dri2_dpy->fd == -1) {
1193       _eglLog(_EGL_WARNING,
1194               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1195               strerror(errno));
1196       goto cleanup_driver;
1197    }
1198
1199    if (dri2_dpy->conn) {
1200       if (!dri2_x11_local_authenticate(disp))
1201          goto cleanup_fd;
1202    }
1203
1204    if (dri2_dpy->dri2_minor >= 1) {
1205       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1206       dri2_dpy->dri2_loader_extension.base.version = 3;
1207       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1208       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1209       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1210          dri2_x11_get_buffers_with_format;
1211    } else {
1212       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1213       dri2_dpy->dri2_loader_extension.base.version = 2;
1214       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1215       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1216       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1217    }
1218
1219    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1220    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1221    dri2_dpy->extensions[2] = NULL;
1222
1223    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1224    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1225
1226    if (!dri2_create_screen(disp))
1227       goto cleanup_fd;
1228
1229    dri2_x11_setup_swap_interval(dri2_dpy);
1230
1231    if (dri2_dpy->conn) {
1232       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1233          goto cleanup_configs;
1234    }
1235
1236    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1237    disp->Extensions.NOK_swap_region = EGL_TRUE;
1238    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1239    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1240
1241 #ifdef HAVE_WAYLAND_PLATFORM
1242    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1243 #endif
1244
1245    if (dri2_dpy->conn) {
1246       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1247          goto cleanup_configs;
1248    }
1249
1250    /* we're supporting EGL 1.4 */
1251    disp->VersionMajor = 1;
1252    disp->VersionMinor = 4;
1253
1254    /* Fill vtbl last to prevent accidentally calling virtual function during
1255     * initialization.
1256     */
1257    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1258
1259    return EGL_TRUE;
1260
1261  cleanup_configs:
1262    _eglCleanupDisplay(disp);
1263    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1264  cleanup_fd:
1265    close(dri2_dpy->fd);
1266  cleanup_driver:
1267    dlclose(dri2_dpy->driver);
1268  cleanup_conn:
1269    if (disp->PlatformDisplay == NULL)
1270       xcb_disconnect(dri2_dpy->conn);
1271  cleanup_dpy:
1272    free(dri2_dpy);
1273
1274    return EGL_FALSE;
1275 }
1276
1277 EGLBoolean
1278 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1279 {
1280    EGLBoolean initialized = EGL_TRUE;
1281
1282    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1283
1284    if (x11_dri2_accel) {
1285       if (!dri2_initialize_x11_dri2(drv, disp)) {
1286          initialized = dri2_initialize_x11_swrast(drv, disp);
1287       }
1288    } else {
1289       initialized = dri2_initialize_x11_swrast(drv, disp);
1290    }
1291
1292    return initialized;
1293 }
1294