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