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, void *native_surface,
 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 drawable;
 197
 198    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 199    drawable = (uintptr_t) native_surface;
 200
 201    (void) drv;
 202
 203    dri2_surf = malloc(sizeof *dri2_surf);
 204    if (!dri2_surf) {
 205       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 206       return NULL;
 207    }
 208
 209    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 210       goto cleanup_surf;
 211
 212    dri2_surf->region = XCB_NONE;
 213    if (type == EGL_PBUFFER_BIT) {
 214       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 215       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 216       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 217                         dri2_surf->drawable, s.data->root,
 218                         dri2_surf->base.Width, dri2_surf->base.Height);
 219    } else {
 220       dri2_surf->drawable = drawable;
 221    }
 222
 223    if (dri2_dpy->dri2) {
 224       dri2_surf->dri_drawable =
 225          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 226                                                type == EGL_WINDOW_BIT ?
 227                                                dri2_conf->dri_double_config :
 228                                                dri2_conf->dri_single_config,
 229                                                dri2_surf);
 230    } else {
 231       assert(dri2_dpy->swrast);
 232       dri2_surf->dri_drawable =
 233          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 234                                                  dri2_conf->dri_double_config,
 235                                                  dri2_surf);
 236    }
 237
 238    if (dri2_surf->dri_drawable == NULL) {
 239       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 240       goto cleanup_pixmap;
 241    }
 242
 243    if (dri2_dpy->dri2) {
 244       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 245    } else {
 246       swrastCreateDrawable(dri2_dpy, dri2_surf, _eglGetConfigKey(conf, EGL_BUFFER_SIZE));
 247    }
 248
 249    if (type != EGL_PBUFFER_BIT) {
 250       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 251       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 252       if (reply == NULL || error != NULL) {
 253          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 254          free(error);
 255          goto cleanup_dri_drawable;
 256       }
 257
 258       dri2_surf->base.Width = reply->width;
 259       dri2_surf->base.Height = reply->height;
 260       free(reply);
 261    }
 262
 263    /* we always copy the back buffer to front */
 264    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 265
 266    return &dri2_surf->base;
 267
 268  cleanup_dri_drawable:
 269    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 270  cleanup_pixmap:
 271    if (type == EGL_PBUFFER_BIT)
 272       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 273  cleanup_surf:
 274    free(dri2_surf);
 275
 276    return NULL;
 277 }
 278
 279 /**
 280  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 281  */
 282 static _EGLSurface *
 283 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 284                                _EGLConfig *conf, void *native_window,
 285                                const EGLint *attrib_list)
 286 {
 287    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 288    _EGLSurface *surf;
 289
 290    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 291                                   native_window, attrib_list);
 292    if (surf != NULL) {
 293       /* When we first create the DRI2 drawable, its swap interval on the
 294        * server side is 1.
 295        */
 296       surf->SwapInterval = 1;
 297
 298       /* Override that with a driconf-set value. */
 299       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 300    }
 301
 302    return surf;
 303 }
 304
 305 static _EGLSurface *
 306 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 307                                _EGLConfig *conf, void *native_pixmap,
 308                                const EGLint *attrib_list)
 309 {
 310    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 311                                   native_pixmap, attrib_list);
 312 }
 313
 314 static _EGLSurface *
 315 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 316                                 _EGLConfig *conf, const EGLint *attrib_list)
 317 {
 318    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 319                                   XCB_WINDOW_NONE, attrib_list);
 320 }
 321
 322 static EGLBoolean
 323 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 324 {
 325    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 326    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 327
 328    (void) drv;
 329
 330    if (!_eglPutSurface(surf))
 331       return EGL_TRUE;
 332
 333    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 334
 335    if (dri2_dpy->dri2) {
 336       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 337    } else {
 338       assert(dri2_dpy->swrast);
 339       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 340    }
 341
 342    if (surf->Type == EGL_PBUFFER_BIT)
 343       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 344
 345    free(surf);
 346
 347    return EGL_TRUE;
 348 }
 349
 350 /**
 351  * Process list of buffer received from the server
 352  *
 353  * Processes the list of buffers received in a reply from the server to either
 354  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 355  */
 356 static void
 357 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 358                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 359 {
 360    struct dri2_egl_display *dri2_dpy =
 361       dri2_egl_display(dri2_surf->base.Resource.Display);
 362    xcb_rectangle_t rectangle;
 363    unsigned i;
 364
 365    dri2_surf->buffer_count = count;
 366    dri2_surf->have_fake_front = 0;
 367
 368    /* This assumes the DRI2 buffer attachment tokens matches the
 369     * __DRIbuffer tokens. */
 370    for (i = 0; i < count; i++) {
 371       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 372       dri2_surf->buffers[i].name = buffers[i].name;
 373       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 374       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 375       dri2_surf->buffers[i].flags = buffers[i].flags;
 376
 377       /* We only use the DRI drivers single buffer configs.  This
 378        * means that if we try to render to a window, DRI2 will give us
 379        * the fake front buffer, which we'll use as a back buffer.
 380        * Note that EGL doesn't require that several clients rendering
 381        * to the same window must see the same aux buffers. */
 382       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 383          dri2_surf->have_fake_front = 1;
 384    }
 385
 386    if (dri2_surf->region != XCB_NONE)
 387       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 388
 389    rectangle.x = 0;
 390    rectangle.y = 0;
 391    rectangle.width = dri2_surf->base.Width;
 392    rectangle.height = dri2_surf->base.Height;
 393    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 394    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 395 }
 396
 397 static __DRIbuffer *
 398 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 399                      int *width, int *height,
 400                      unsigned int *attachments, int count,
 401                      int *out_count, void *loaderPrivate)
 402 {
 403    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 404    struct dri2_egl_display *dri2_dpy =
 405       dri2_egl_display(dri2_surf->base.Resource.Display);
 406    xcb_dri2_dri2_buffer_t *buffers;
 407    xcb_dri2_get_buffers_reply_t *reply;
 408    xcb_dri2_get_buffers_cookie_t cookie;
 409
 410    (void) driDrawable;
 411
 412    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 413                                             dri2_surf->drawable,
 414                                             count, count, attachments);
 415    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 416    buffers = xcb_dri2_get_buffers_buffers (reply);
 417    if (buffers == NULL)
 418       return NULL;
 419
 420    *out_count = reply->count;
 421    dri2_surf->base.Width = *width = reply->width;
 422    dri2_surf->base.Height = *height = reply->height;
 423    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 424
 425    free(reply);
 426
 427    return dri2_surf->buffers;
 428 }
 429
 430 static __DRIbuffer *
 431 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 432                                  int *width, int *height,
 433                                  unsigned int *attachments, int count,
 434                                  int *out_count, void *loaderPrivate)
 435 {
 436    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 437    struct dri2_egl_display *dri2_dpy =
 438       dri2_egl_display(dri2_surf->base.Resource.Display);
 439    xcb_dri2_dri2_buffer_t *buffers;
 440    xcb_dri2_get_buffers_with_format_reply_t *reply;
 441    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 442    xcb_dri2_attach_format_t *format_attachments;
 443
 444    (void) driDrawable;
 445
 446    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 447    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 448                                                         dri2_surf->drawable,
 449                                                         count, count,
 450                                                         format_attachments);
 451
 452    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 453                                                    cookie, NULL);
 454    if (reply == NULL)
 455       return NULL;
 456
 457    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 458    dri2_surf->base.Width = *width = reply->width;
 459    dri2_surf->base.Height = *height = reply->height;
 460    *out_count = reply->count;
 461    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 462
 463    free(reply);
 464
 465    return dri2_surf->buffers;
 466 }
 467
 468 static void
 469 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 470 {
 471    (void) driDrawable;
 472
 473    /* FIXME: Does EGL support front buffer rendering at all? */
 474
 475 #if 0
 476    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 477
 478    dri2WaitGL(dri2_surf);
 479 #else
 480    (void) loaderPrivate;
 481 #endif
 482 }
 483
 484 static char *
 485 dri2_x11_strndup(const char *s, int length)
 486 {
 487    char *d;
 488
 489    d = malloc(length + 1);
 490    if (d == NULL)
 491       return NULL;
 492
 493    memcpy(d, s, length);
 494    d[length] = '\0';
 495
 496    return d;
 497 }
 498
 499 static EGLBoolean
 500 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 501 {
 502    xcb_xfixes_query_version_reply_t *xfixes_query;
 503    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 504    xcb_dri2_query_version_reply_t *dri2_query;
 505    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 506    xcb_dri2_connect_reply_t *connect;
 507    xcb_dri2_connect_cookie_t connect_cookie;
 508    xcb_generic_error_t *error;
 509    xcb_screen_iterator_t s;
 510    char *driver_name, *device_name;
 511    const xcb_query_extension_reply_t *extension;
 512
 513    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 514    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 515
 516    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 517    if (!(extension && extension->present))
 518       return EGL_FALSE;
 519
 520    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 521    if (!(extension && extension->present))
 522       return EGL_FALSE;
 523
 524    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 525                                                   XCB_XFIXES_MAJOR_VERSION,
 526                                                   XCB_XFIXES_MINOR_VERSION);
 527
 528    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 529                                                XCB_DRI2_MAJOR_VERSION,
 530                                                XCB_DRI2_MINOR_VERSION);
 531
 532    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 533    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 534                                                 s.data->root,
 535                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 536
 537    xfixes_query =
 538       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 539                                       xfixes_query_cookie, &error);
 540    if (xfixes_query == NULL ||
 541        error != NULL || xfixes_query->major_version < 2) {
 542       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 543       free(error);
 544       return EGL_FALSE;
 545    }
 546    free(xfixes_query);
 547
 548    dri2_query =
 549       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 550    if (dri2_query == NULL || error != NULL) {
 551       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 552       free(error);
 553       return EGL_FALSE;
 554    }
 555    dri2_dpy->dri2_major = dri2_query->major_version;
 556    dri2_dpy->dri2_minor = dri2_query->minor_version;
 557    free(dri2_query);
 558
 559    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 560    if (connect == NULL ||
 561        connect->driver_name_length + connect->device_name_length == 0) {
 562       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 563       return EGL_FALSE;
 564    }
 565
 566    driver_name = xcb_dri2_connect_driver_name (connect);
 567    dri2_dpy->driver_name =
 568       dri2_x11_strndup(driver_name,
 569                        xcb_dri2_connect_driver_name_length(connect));
 570
 571    device_name = xcb_dri2_connect_device_name (connect);
 572
 573    dri2_dpy->device_name =
 574       dri2_x11_strndup(device_name,
 575                        xcb_dri2_connect_device_name_length(connect));
 576
 577    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 578       free(dri2_dpy->device_name);
 579       free(dri2_dpy->driver_name);
 580       free(connect);
 581       return EGL_FALSE;
 582    }
 583    free(connect);
 584
 585    return EGL_TRUE;
 586 }
 587
 588 static int
 589 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 590 {
 591    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 592    xcb_dri2_authenticate_reply_t *authenticate;
 593    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 594    xcb_screen_iterator_t s;
 595    int ret = 0;
 596
 597    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 598    authenticate_cookie =
 599       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, id);
 600    authenticate =
 601       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 602
 603    if (authenticate == NULL || !authenticate->authenticated)
 604       ret = -1;
 605
 606    free(authenticate);
 607
 608    return ret;
 609 }
 610
 611 static EGLBoolean
 612 dri2_x11_local_authenticate(_EGLDisplay *disp)
 613 {
 614 #ifdef HAVE_LIBDRM
 615    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 616    drm_magic_t magic;
 617
 618    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 619       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 620       return EGL_FALSE;
 621    }
 622
 623    if (dri2_x11_authenticate(disp, magic) < 0) {
 624       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 625       return EGL_FALSE;
 626    }
 627 #endif
 628    return EGL_TRUE;
 629 }
 630
 631 static EGLBoolean
 632 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 633                                  _EGLDisplay *disp)
 634 {
 635    xcb_screen_iterator_t s;
 636    xcb_depth_iterator_t d;
 637    xcb_visualtype_t *visuals;
 638    int i, j, id;
 639    unsigned int rgba_masks[4];
 640    EGLint surface_type;
 641    EGLint config_attrs[] = {
 642            EGL_NATIVE_VISUAL_ID,   0,
 643            EGL_NATIVE_VISUAL_TYPE, 0,
 644            EGL_NONE
 645    };
 646
 647    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 648    d = xcb_screen_allowed_depths_iterator(s.data);
 649    id = 1;
 650
 651    surface_type =
 652       EGL_WINDOW_BIT |
 653       EGL_PIXMAP_BIT |
 654       EGL_PBUFFER_BIT |
 655       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 656
 657    while (d.rem > 0) {
 658       EGLBoolean class_added[6] = { 0, };
 659
 660       visuals = xcb_depth_visuals(d.data);
 661       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 662          if (class_added[visuals[i]._class])
 663             continue;
 664
 665          class_added[visuals[i]._class] = EGL_TRUE;
 666          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 667             config_attrs[1] = visuals[i].visual_id;
 668             config_attrs[3] = visuals[i]._class;
 669
 670             rgba_masks[0] = visuals[i].red_mask;
 671             rgba_masks[1] = visuals[i].green_mask;
 672             rgba_masks[2] = visuals[i].blue_mask;
 673             rgba_masks[3] = 0;
 674             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 675                             surface_type, config_attrs, rgba_masks);
 676
 677             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 678              * Otherwise it will only match a 32-bit RGBA visual.  On a
 679              * composited window manager on X11, this will make all of the
 680              * EGLConfigs with destination alpha get blended by the
 681              * compositor.  This is probably not what the application
 682              * wants... especially on drivers that only have 32-bit RGBA
 683              * EGLConfigs! */
 684             if (d.data->depth == 24) {
 685                rgba_masks[3] =
 686                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 687                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 688                                surface_type, config_attrs, rgba_masks);
 689             }
 690          }
 691       }
 692
 693       xcb_depth_next(&d);
 694    }
 695
 696    if (!_eglGetArraySize(disp->Configs)) {
 697       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 698       return EGL_FALSE;
 699    }
 700
 701    return EGL_TRUE;
 702 }
 703
 704 static EGLBoolean
 705 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 706                  _EGLSurface *draw, xcb_xfixes_region_t region)
 707 {
 708    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 709    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 710    enum xcb_dri2_attachment_t render_attachment;
 711    xcb_dri2_copy_region_cookie_t cookie;
 712
 713    /* No-op for a pixmap or pbuffer surface */
 714    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 715       return EGL_TRUE;
 716
 717    if (dri2_dpy->flush)
 718       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 719
 720    if (dri2_surf->have_fake_front)
 721       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 722    else
 723       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 724
 725    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 726                                            dri2_surf->drawable,
 727                                            region,
 728                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 729                                            render_attachment);
 730    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 731
 732    return EGL_TRUE;
 733 }
 734
 735 static int64_t
 736 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 737                           int64_t msc, int64_t divisor, int64_t remainder)
 738 {
 739    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 740    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 741    uint32_t msc_hi = msc >> 32;
 742    uint32_t msc_lo = msc & 0xffffffff;
 743    uint32_t divisor_hi = divisor >> 32;
 744    uint32_t divisor_lo = divisor & 0xffffffff;
 745    uint32_t remainder_hi = remainder >> 32;
 746    uint32_t remainder_lo = remainder & 0xffffffff;
 747    xcb_dri2_swap_buffers_cookie_t cookie;
 748    xcb_dri2_swap_buffers_reply_t *reply;
 749    int64_t swap_count = -1;
 750
 751    /* No-op for a pixmap or pbuffer surface */
 752    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 753       return 0;
 754
 755    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 756       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 757
 758    if (dri2_dpy->flush)
 759       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 760
 761    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 762                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 763
 764    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 765
 766    if (reply) {
 767       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 768       free(reply);
 769    }
 770
 771    /* Since we aren't watching for the server's invalidate events like we're
 772     * supposed to (due to XCB providing no mechanism for filtering the events
 773     * the way xlib does), and SwapBuffers is a common cause of invalidate
 774     * events, just shove one down to the driver, even though we haven't told
 775     * the driver that we're the kind of loader that provides reliable
 776     * invalidate events.  This causes the driver to request buffers again at
 777     * its next draw, so that we get the correct buffers if a pageflip
 778     * happened.  The driver should still be using the viewport hack to catch
 779     * window resizes.
 780     */
 781    if (dri2_dpy->flush &&
 782        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 783       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 784
 785    return swap_count;
 786 }
 787
 788 static EGLBoolean
 789 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 790 {
 791    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 792    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 793
 794    if (dri2_dpy->dri2) {
 795       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 796    } else {
 797       assert(dri2_dpy->swrast);
 798
 799       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 800       return EGL_TRUE;
 801    }
 802 }
 803
 804 static EGLBoolean
 805 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 806                              _EGLSurface *draw,
 807                              EGLint numRects, const EGLint *rects)
 808 {
 809    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 810    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 811    EGLBoolean ret;
 812    xcb_xfixes_region_t region;
 813    xcb_rectangle_t rectangles[16];
 814    int i;
 815
 816    if (numRects > (int)ARRAY_SIZE(rectangles))
 817       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 818
 819    for (i = 0; i < numRects; i++) {
 820       rectangles[i].x = rects[i * 4];
 821       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 822       rectangles[i].width = rects[i * 4 + 2];
 823       rectangles[i].height = rects[i * 4 + 3];
 824    }
 825
 826    region = xcb_generate_id(dri2_dpy->conn);
 827    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 828    ret = dri2_copy_region(drv, disp, draw, region);
 829    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 830
 831    return ret;
 832 }
 833
 834 static EGLBoolean
 835 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 836                      EGLint x, EGLint y, EGLint width, EGLint height)
 837 {
 838    const EGLint rect[4] = { x, y, width, height };
 839
 840    if (x < 0 || y < 0 || width < 0 || height < 0)
 841       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 842
 843    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 844 }
 845
 846 static EGLBoolean
 847 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 848                        EGLint interval)
 849 {
 850    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 851    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 852
 853    if (interval > surf->Config->MaxSwapInterval)
 854       interval = surf->Config->MaxSwapInterval;
 855    else if (interval < surf->Config->MinSwapInterval)
 856       interval = surf->Config->MinSwapInterval;
 857
 858    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 859       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 860
 861    surf->SwapInterval = interval;
 862
 863    return EGL_TRUE;
 864 }
 865
 866 static EGLBoolean
 867 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 868                       void *native_pixmap_target)
 869 {
 870    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 871    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 872    xcb_gcontext_t gc;
 873    xcb_pixmap_t target;
 874
 875    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 876    target = (uintptr_t) native_pixmap_target;
 877
 878    (void) drv;
 879
 880    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 881
 882    gc = xcb_generate_id(dri2_dpy->conn);
 883    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 884    xcb_copy_area(dri2_dpy->conn,
 885                   dri2_surf->drawable,
 886                   target,
 887                   gc,
 888                   0, 0,
 889                   0, 0,
 890                   dri2_surf->base.Width,
 891                   dri2_surf->base.Height);
 892    xcb_free_gc(dri2_dpy->conn, gc);
 893
 894    return EGL_TRUE;
 895 }
 896
 897 static _EGLImage *
 898 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 899                              EGLClientBuffer buffer, const EGLint *attr_list)
 900 {
 901    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 902    struct dri2_egl_image *dri2_img;
 903    unsigned int attachments[1];
 904    xcb_drawable_t drawable;
 905    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 906    xcb_dri2_get_buffers_reply_t *buffers_reply;
 907    xcb_dri2_dri2_buffer_t *buffers;
 908    xcb_get_geometry_cookie_t geometry_cookie;
 909    xcb_get_geometry_reply_t *geometry_reply;
 910    xcb_generic_error_t *error;
 911    int stride, format;
 912
 913    (void) ctx;
 914
 915    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 916    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 917    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 918    buffers_cookie =
 919       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 920                                       drawable, 1, 1, attachments);
 921    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 922    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 923                                                buffers_cookie, NULL);
 924    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 925    if (buffers == NULL) {
 926       return NULL;
 927    }
 928
 929    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 930                                             geometry_cookie, &error);
 931    if (geometry_reply == NULL || error != NULL) {
 932       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 933       free(error);
 934       free(buffers_reply);
 935       return NULL;
 936    }
 937
 938    switch (geometry_reply->depth) {
 939    case 16:
 940       format = __DRI_IMAGE_FORMAT_RGB565;
 941       break;
 942    case 24:
 943       format = __DRI_IMAGE_FORMAT_XRGB8888;
 944       break;
 945    case 32:
 946       format = __DRI_IMAGE_FORMAT_ARGB8888;
 947       break;
 948    default:
 949       _eglError(EGL_BAD_PARAMETER,
 950                 "dri2_create_image_khr: unsupported pixmap depth");
 951       free(buffers_reply);
 952       free(geometry_reply);
 953       return NULL;
 954    }
 955
 956    dri2_img = malloc(sizeof *dri2_img);
 957    if (!dri2_img) {
 958       free(buffers_reply);
 959       free(geometry_reply);
 960       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 961       return EGL_NO_IMAGE_KHR;
 962    }
 963
 964    if (!_eglInitImage(&dri2_img->base, disp)) {
 965       free(buffers_reply);
 966       free(geometry_reply);
 967       free(dri2_img);
 968       return EGL_NO_IMAGE_KHR;
 969    }
 970
 971    stride = buffers[0].pitch / buffers[0].cpp;
 972    dri2_img->dri_image =
 973       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 974                                            buffers_reply->width,
 975                                            buffers_reply->height,
 976                                            format,
 977                                            buffers[0].name,
 978                                            stride,
 979                                            dri2_img);
 980
 981    free(buffers_reply);
 982    free(geometry_reply);
 983
 984    return &dri2_img->base;
 985 }
 986
 987 static _EGLImage *
 988 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 989                           _EGLContext *ctx, EGLenum target,
 990                           EGLClientBuffer buffer, const EGLint *attr_list)
 991 {
 992    (void) drv;
 993
 994    switch (target) {
 995    case EGL_NATIVE_PIXMAP_KHR:
 996       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 997    default:
 998       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 999    }
1000 }
1001
1002 static _EGLImage*
1003 dri2_x11_swrast_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1004                                  _EGLContext *ctx, EGLenum target,
1005                                  EGLClientBuffer buffer,
1006                                  const EGLint *attr_list)
1007 {
1008    return NULL;
1009 }
1010
1011 static EGLBoolean
1012 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1013                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1014                          EGLuint64KHR *sbc)
1015 {
1016    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1017    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1018    xcb_dri2_get_msc_cookie_t cookie;
1019    xcb_dri2_get_msc_reply_t *reply;
1020
1021    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1022    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1023
1024    if (!reply) {
1025       _eglError(EGL_BAD_ACCESS, __func__);
1026       return EGL_FALSE;
1027    }
1028
1029    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1030    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1031    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1032    free(reply);
1033
1034    return EGL_TRUE;
1035 }
1036
1037 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1038    .authenticate = NULL,
1039    .create_window_surface = dri2_x11_create_window_surface,
1040    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1041    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1042    .destroy_surface = dri2_x11_destroy_surface,
1043    .create_image = dri2_x11_swrast_create_image_khr,
1044    .swap_interval = dri2_fallback_swap_interval,
1045    .swap_buffers = dri2_x11_swap_buffers,
1046    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1047    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1048    .copy_buffers = dri2_x11_copy_buffers,
1049    .query_buffer_age = dri2_fallback_query_buffer_age,
1050    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1051    .get_sync_values = dri2_fallback_get_sync_values,
1052 };
1053
1054 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1055    .authenticate = dri2_x11_authenticate,
1056    .create_window_surface = dri2_x11_create_window_surface,
1057    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1058    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1059    .destroy_surface = dri2_x11_destroy_surface,
1060    .create_image = dri2_x11_create_image_khr,
1061    .swap_interval = dri2_x11_swap_interval,
1062    .swap_buffers = dri2_x11_swap_buffers,
1063    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1064    .swap_buffers_region = dri2_x11_swap_buffers_region,
1065    .post_sub_buffer = dri2_x11_post_sub_buffer,
1066    .copy_buffers = dri2_x11_copy_buffers,
1067    .query_buffer_age = dri2_fallback_query_buffer_age,
1068    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1069    .get_sync_values = dri2_x11_get_sync_values,
1070 };
1071
1072 static EGLBoolean
1073 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1074 {
1075    struct dri2_egl_display *dri2_dpy;
1076
1077    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1078    if (!dri2_dpy)
1079       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1080
1081    disp->DriverData = (void *) dri2_dpy;
1082    if (disp->PlatformDisplay == NULL) {
1083       dri2_dpy->conn = xcb_connect(0, 0);
1084       dri2_dpy->own_device = true;
1085    } else {
1086       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1087    }
1088
1089    if (xcb_connection_has_error(dri2_dpy->conn)) {
1090       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1091       goto cleanup_dpy;
1092    }
1093
1094    if (!dri2_load_driver_swrast(disp))
1095       goto cleanup_conn;
1096
1097    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1098    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
1099    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1100    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1101    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1102
1103    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1104    dri2_dpy->extensions[1] = NULL;
1105    dri2_dpy->extensions[2] = NULL;
1106
1107    if (!dri2_create_screen(disp))
1108       goto cleanup_driver;
1109
1110    if (dri2_dpy->conn) {
1111       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1112          goto cleanup_configs;
1113    }
1114
1115    /* we're supporting EGL 1.4 */
1116    disp->VersionMajor = 1;
1117    disp->VersionMinor = 4;
1118
1119    /* Fill vtbl last to prevent accidentally calling virtual function during
1120     * initialization.
1121     */
1122    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1123
1124    return EGL_TRUE;
1125
1126  cleanup_configs:
1127    _eglCleanupDisplay(disp);
1128    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1129  cleanup_driver:
1130    dlclose(dri2_dpy->driver);
1131  cleanup_conn:
1132    if (disp->PlatformDisplay == NULL)
1133       xcb_disconnect(dri2_dpy->conn);
1134  cleanup_dpy:
1135    free(dri2_dpy);
1136
1137    return EGL_FALSE;
1138 }
1139
1140 static void
1141 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1142 {
1143    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1144    int arbitrary_max_interval = 1000;
1145
1146    /* default behavior for no SwapBuffers support: no vblank syncing
1147     * either.
1148     */
1149    dri2_dpy->min_swap_interval = 0;
1150    dri2_dpy->max_swap_interval = 0;
1151
1152    if (!dri2_dpy->swap_available)
1153       return;
1154
1155    /* If we do have swapbuffers, then we can support pretty much any swap
1156     * interval, but we allow driconf to override applications.
1157     */
1158    if (dri2_dpy->config)
1159       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1160                                      "vblank_mode", &vblank_mode);
1161    switch (vblank_mode) {
1162    case DRI_CONF_VBLANK_NEVER:
1163       dri2_dpy->min_swap_interval = 0;
1164       dri2_dpy->max_swap_interval = 0;
1165       dri2_dpy->default_swap_interval = 0;
1166       break;
1167    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1168       dri2_dpy->min_swap_interval = 1;
1169       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1170       dri2_dpy->default_swap_interval = 1;
1171       break;
1172    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1173       dri2_dpy->min_swap_interval = 0;
1174       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1175       dri2_dpy->default_swap_interval = 0;
1176       break;
1177    default:
1178    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1179       dri2_dpy->min_swap_interval = 0;
1180       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1181       dri2_dpy->default_swap_interval = 1;
1182       break;
1183    }
1184 }
1185
1186 static EGLBoolean
1187 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1188 {
1189    struct dri2_egl_display *dri2_dpy;
1190
1191    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1192    if (!dri2_dpy)
1193       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1194
1195    disp->DriverData = (void *) dri2_dpy;
1196    if (disp->PlatformDisplay == NULL) {
1197       dri2_dpy->conn = xcb_connect(0, 0);
1198       dri2_dpy->own_device = true;
1199    } else {
1200       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1201    }
1202
1203    if (xcb_connection_has_error(dri2_dpy->conn)) {
1204       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1205       goto cleanup_dpy;
1206    }
1207
1208    if (dri2_dpy->conn) {
1209       if (!dri2_x11_connect(dri2_dpy))
1210          goto cleanup_conn;
1211    }
1212
1213    if (!dri2_load_driver(disp))
1214       goto cleanup_conn;
1215
1216 #ifdef O_CLOEXEC
1217    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1218    if (dri2_dpy->fd == -1 && errno == EINVAL)
1219 #endif
1220    {
1221       dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR);
1222       if (dri2_dpy->fd != -1)
1223          fcntl(dri2_dpy->fd, F_SETFD, fcntl(dri2_dpy->fd, F_GETFD) |
1224             FD_CLOEXEC);
1225    }
1226    if (dri2_dpy->fd == -1) {
1227       _eglLog(_EGL_WARNING,
1228               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1229               strerror(errno));
1230       goto cleanup_driver;
1231    }
1232
1233    if (dri2_dpy->conn) {
1234       if (!dri2_x11_local_authenticate(disp))
1235          goto cleanup_fd;
1236    }
1237
1238    if (dri2_dpy->dri2_minor >= 1) {
1239       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1240       dri2_dpy->dri2_loader_extension.base.version = 3;
1241       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1242       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1243       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1244          dri2_x11_get_buffers_with_format;
1245    } else {
1246       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1247       dri2_dpy->dri2_loader_extension.base.version = 2;
1248       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1249       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1250       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1251    }
1252
1253    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1254    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1255    dri2_dpy->extensions[2] = NULL;
1256
1257    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1258    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1259
1260    if (!dri2_create_screen(disp))
1261       goto cleanup_fd;
1262
1263    dri2_x11_setup_swap_interval(dri2_dpy);
1264
1265    if (dri2_dpy->conn) {
1266       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1267          goto cleanup_configs;
1268    }
1269
1270    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1271    disp->Extensions.NOK_swap_region = EGL_TRUE;
1272    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1273    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1274    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1275
1276 #ifdef HAVE_WAYLAND_PLATFORM
1277    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1278 #endif
1279
1280    if (dri2_dpy->conn) {
1281       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1282          goto cleanup_configs;
1283    }
1284
1285    /* we're supporting EGL 1.4 */
1286    disp->VersionMajor = 1;
1287    disp->VersionMinor = 4;
1288
1289    /* Fill vtbl last to prevent accidentally calling virtual function during
1290     * initialization.
1291     */
1292    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1293
1294    return EGL_TRUE;
1295
1296  cleanup_configs:
1297    _eglCleanupDisplay(disp);
1298    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1299  cleanup_fd:
1300    close(dri2_dpy->fd);
1301  cleanup_driver:
1302    dlclose(dri2_dpy->driver);
1303  cleanup_conn:
1304    if (disp->PlatformDisplay == NULL)
1305       xcb_disconnect(dri2_dpy->conn);
1306  cleanup_dpy:
1307    free(dri2_dpy);
1308
1309    return EGL_FALSE;
1310 }
1311
1312 EGLBoolean
1313 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1314 {
1315    EGLBoolean initialized = EGL_TRUE;
1316
1317    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1318
1319    if (x11_dri2_accel) {
1320       if (!dri2_initialize_x11_dri2(drv, disp)) {
1321          initialized = dri2_initialize_x11_swrast(drv, disp);
1322       }
1323    } else {
1324       initialized = dri2_initialize_x11_swrast(drv, disp);
1325    }
1326
1327    return initialized;
1328 }
1329