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 <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43
  44 #include "egl_dri2.h"
  45 #include "egl_dri2_fallbacks.h"
  46 #include "loader.h"
  47
  48 static EGLBoolean
  49 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  50                        EGLint interval);
  51
  52 static void
  53 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  54                      struct dri2_egl_surface * dri2_surf)
  55 {
  56    uint32_t           mask;
  57    const uint32_t     function = GXcopy;
  58    uint32_t           valgc[2];
  59
  60    /* create GC's */
  61    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  62    mask = XCB_GC_FUNCTION;
  63    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  64
  65    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  66    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  67    valgc[0] = function;
  68    valgc[1] = False;
  69    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  70    switch (dri2_surf->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", dri2_surf->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 static xcb_screen_t *
 182 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 183 {
 184     for (; iter.rem; --screen, xcb_screen_next(&iter))
 185         if (screen == 0)
 186             return iter.data;
 187
 188     return NULL;
 189 }
 190
 191
 192 /**
 193  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 194  */
 195 static _EGLSurface *
 196 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 197                         _EGLConfig *conf, void *native_surface,
 198                         const EGLint *attrib_list)
 199 {
 200    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 201    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 202    struct dri2_egl_surface *dri2_surf;
 203    xcb_get_geometry_cookie_t cookie;
 204    xcb_get_geometry_reply_t *reply;
 205    xcb_screen_iterator_t s;
 206    xcb_generic_error_t *error;
 207    xcb_drawable_t drawable;
 208    xcb_screen_t *screen;
 209
 210    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 211    drawable = (uintptr_t) native_surface;
 212
 213    (void) drv;
 214
 215    dri2_surf = malloc(sizeof *dri2_surf);
 216    if (!dri2_surf) {
 217       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 218       return NULL;
 219    }
 220
 221    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 222       goto cleanup_surf;
 223
 224    dri2_surf->region = XCB_NONE;
 225    if (type == EGL_PBUFFER_BIT) {
 226       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 227       screen = get_xcb_screen(s, dri2_dpy->screen);
 228       if (!screen) {
 229          _eglError(EGL_BAD_ALLOC, "failed to get xcb screen");
 230          goto cleanup_surf;
 231       }
 232
 233       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 234       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 235                        dri2_surf->drawable, screen->root,
 236                         dri2_surf->base.Width, dri2_surf->base.Height);
 237    } else {
 238       if (!drawable) {
 239          if (type == EGL_WINDOW_BIT)
 240             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 241          else
 242             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 243          goto cleanup_surf;
 244       }
 245       dri2_surf->drawable = drawable;
 246    }
 247
 248    if (dri2_dpy->dri2) {
 249       const __DRIconfig *config =
 250          dri2_get_dri_config(dri2_conf, type, dri2_surf->base.GLColorspace);
 251
 252       dri2_surf->dri_drawable =
 253          (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 254                                               dri2_surf);
 255    } else {
 256       assert(dri2_dpy->swrast);
 257       dri2_surf->dri_drawable =
 258          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 259                                                  dri2_conf->dri_double_config,
 260                                                  dri2_surf);
 261    }
 262
 263    if (dri2_surf->dri_drawable == NULL) {
 264       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 265       goto cleanup_pixmap;
 266    }
 267
 268    if (type != EGL_PBUFFER_BIT) {
 269       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 270       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 271       if (reply == NULL || error != NULL) {
 272          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 273          free(error);
 274          goto cleanup_dri_drawable;
 275       }
 276
 277       dri2_surf->base.Width = reply->width;
 278       dri2_surf->base.Height = reply->height;
 279       dri2_surf->depth = reply->depth;
 280       free(reply);
 281    }
 282
 283    if (dri2_dpy->dri2) {
 284       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 285    } else {
 286       if (type == EGL_PBUFFER_BIT) {
 287          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 288       }
 289       swrastCreateDrawable(dri2_dpy, dri2_surf);
 290    }
 291
 292    /* we always copy the back buffer to front */
 293    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 294
 295    return &dri2_surf->base;
 296
 297  cleanup_dri_drawable:
 298    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 299  cleanup_pixmap:
 300    if (type == EGL_PBUFFER_BIT)
 301       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 302  cleanup_surf:
 303    free(dri2_surf);
 304
 305    return NULL;
 306 }
 307
 308 /**
 309  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 310  */
 311 static _EGLSurface *
 312 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 313                                _EGLConfig *conf, void *native_window,
 314                                const EGLint *attrib_list)
 315 {
 316    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 317    _EGLSurface *surf;
 318
 319    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 320                                   native_window, attrib_list);
 321    if (surf != NULL) {
 322       /* When we first create the DRI2 drawable, its swap interval on the
 323        * server side is 1.
 324        */
 325       surf->SwapInterval = 1;
 326
 327       /* Override that with a driconf-set value. */
 328       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 329    }
 330
 331    return surf;
 332 }
 333
 334 static _EGLSurface *
 335 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 336                                _EGLConfig *conf, void *native_pixmap,
 337                                const EGLint *attrib_list)
 338 {
 339    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 340                                   native_pixmap, attrib_list);
 341 }
 342
 343 static _EGLSurface *
 344 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 345                                 _EGLConfig *conf, const EGLint *attrib_list)
 346 {
 347    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 348                                   XCB_WINDOW_NONE, attrib_list);
 349 }
 350
 351 static EGLBoolean
 352 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 353 {
 354    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 355    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 356
 357    (void) drv;
 358
 359    if (!_eglPutSurface(surf))
 360       return EGL_TRUE;
 361
 362    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 363
 364    if (dri2_dpy->dri2) {
 365       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 366    } else {
 367       assert(dri2_dpy->swrast);
 368       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 369    }
 370
 371    if (surf->Type == EGL_PBUFFER_BIT)
 372       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 373
 374    free(surf);
 375
 376    return EGL_TRUE;
 377 }
 378
 379 /**
 380  * Process list of buffer received from the server
 381  *
 382  * Processes the list of buffers received in a reply from the server to either
 383  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 384  */
 385 static void
 386 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 387                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 388 {
 389    struct dri2_egl_display *dri2_dpy =
 390       dri2_egl_display(dri2_surf->base.Resource.Display);
 391    xcb_rectangle_t rectangle;
 392    unsigned i;
 393
 394    dri2_surf->buffer_count = count;
 395    dri2_surf->have_fake_front = 0;
 396
 397    /* This assumes the DRI2 buffer attachment tokens matches the
 398     * __DRIbuffer tokens. */
 399    for (i = 0; i < count; i++) {
 400       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 401       dri2_surf->buffers[i].name = buffers[i].name;
 402       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 403       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 404       dri2_surf->buffers[i].flags = buffers[i].flags;
 405
 406       /* We only use the DRI drivers single buffer configs.  This
 407        * means that if we try to render to a window, DRI2 will give us
 408        * the fake front buffer, which we'll use as a back buffer.
 409        * Note that EGL doesn't require that several clients rendering
 410        * to the same window must see the same aux buffers. */
 411       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 412          dri2_surf->have_fake_front = 1;
 413    }
 414
 415    if (dri2_surf->region != XCB_NONE)
 416       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 417
 418    rectangle.x = 0;
 419    rectangle.y = 0;
 420    rectangle.width = dri2_surf->base.Width;
 421    rectangle.height = dri2_surf->base.Height;
 422    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 423    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 424 }
 425
 426 static __DRIbuffer *
 427 dri2_x11_get_buffers(__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_reply_t *reply;
 437    xcb_dri2_get_buffers_cookie_t cookie;
 438
 439    (void) driDrawable;
 440
 441    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 442                                             dri2_surf->drawable,
 443                                             count, count, attachments);
 444    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 445    buffers = xcb_dri2_get_buffers_buffers (reply);
 446    if (buffers == NULL)
 447       return NULL;
 448
 449    *out_count = reply->count;
 450    dri2_surf->base.Width = *width = reply->width;
 451    dri2_surf->base.Height = *height = reply->height;
 452    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 453
 454    free(reply);
 455
 456    return dri2_surf->buffers;
 457 }
 458
 459 static __DRIbuffer *
 460 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 461                                  int *width, int *height,
 462                                  unsigned int *attachments, int count,
 463                                  int *out_count, void *loaderPrivate)
 464 {
 465    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 466    struct dri2_egl_display *dri2_dpy =
 467       dri2_egl_display(dri2_surf->base.Resource.Display);
 468    xcb_dri2_dri2_buffer_t *buffers;
 469    xcb_dri2_get_buffers_with_format_reply_t *reply;
 470    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 471    xcb_dri2_attach_format_t *format_attachments;
 472
 473    (void) driDrawable;
 474
 475    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 476    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 477                                                         dri2_surf->drawable,
 478                                                         count, count,
 479                                                         format_attachments);
 480
 481    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 482                                                    cookie, NULL);
 483    if (reply == NULL)
 484       return NULL;
 485
 486    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 487    dri2_surf->base.Width = *width = reply->width;
 488    dri2_surf->base.Height = *height = reply->height;
 489    *out_count = reply->count;
 490    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 491
 492    free(reply);
 493
 494    return dri2_surf->buffers;
 495 }
 496
 497 static void
 498 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 499 {
 500    (void) driDrawable;
 501
 502    /* FIXME: Does EGL support front buffer rendering at all? */
 503
 504 #if 0
 505    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 506
 507    dri2WaitGL(dri2_surf);
 508 #else
 509    (void) loaderPrivate;
 510 #endif
 511 }
 512
 513 static EGLBoolean
 514 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 515 {
 516    xcb_xfixes_query_version_reply_t *xfixes_query;
 517    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 518    xcb_dri2_query_version_reply_t *dri2_query;
 519    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 520    xcb_dri2_connect_reply_t *connect;
 521    xcb_dri2_connect_cookie_t connect_cookie;
 522    xcb_generic_error_t *error;
 523    xcb_screen_iterator_t s;
 524    xcb_screen_t *screen;
 525    char *driver_name, *loader_driver_name, *device_name;
 526    const xcb_query_extension_reply_t *extension;
 527
 528    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 529    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 530
 531    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 532    if (!(extension && extension->present))
 533       return EGL_FALSE;
 534
 535    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 536    if (!(extension && extension->present))
 537       return EGL_FALSE;
 538
 539    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 540                                                   XCB_XFIXES_MAJOR_VERSION,
 541                                                   XCB_XFIXES_MINOR_VERSION);
 542
 543    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 544                                                XCB_DRI2_MAJOR_VERSION,
 545                                                XCB_DRI2_MINOR_VERSION);
 546
 547    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 548    screen = get_xcb_screen(s, dri2_dpy->screen);
 549    if (!screen) {
 550       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 551       return EGL_FALSE;
 552    }
 553    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 554                                    XCB_DRI2_DRIVER_TYPE_DRI);
 555
 556    xfixes_query =
 557       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 558                                       xfixes_query_cookie, &error);
 559    if (xfixes_query == NULL ||
 560        error != NULL || xfixes_query->major_version < 2) {
 561       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 562       free(error);
 563       return EGL_FALSE;
 564    }
 565    free(xfixes_query);
 566
 567    dri2_query =
 568       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 569    if (dri2_query == NULL || error != NULL) {
 570       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 571       free(error);
 572       return EGL_FALSE;
 573    }
 574    dri2_dpy->dri2_major = dri2_query->major_version;
 575    dri2_dpy->dri2_minor = dri2_query->minor_version;
 576    free(dri2_query);
 577
 578    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 579    if (connect == NULL ||
 580        connect->driver_name_length + connect->device_name_length == 0) {
 581       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 582       return EGL_FALSE;
 583    }
 584
 585    device_name = xcb_dri2_connect_device_name (connect);
 586
 587    dri2_dpy->device_name =
 588       strndup(device_name,
 589               xcb_dri2_connect_device_name_length(connect));
 590
 591    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 592    if (dri2_dpy->fd == -1) {
 593       _eglLog(_EGL_WARNING,
 594               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
 595               strerror(errno));
 596       free(dri2_dpy->device_name);
 597       free(connect);
 598       return EGL_FALSE;
 599    }
 600
 601    driver_name = xcb_dri2_connect_driver_name (connect);
 602
 603    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 604     * Otherwise, default to the server's value.
 605     */
 606    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 607    if (loader_driver_name) {
 608       dri2_dpy->driver_name = loader_driver_name;
 609    } else {
 610       dri2_dpy->driver_name =
 611          strndup(driver_name,
 612                  xcb_dri2_connect_driver_name_length(connect));
 613    }
 614
 615    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 616       close(dri2_dpy->fd);
 617       free(dri2_dpy->device_name);
 618       free(dri2_dpy->driver_name);
 619       free(connect);
 620       return EGL_FALSE;
 621    }
 622    free(connect);
 623
 624    return EGL_TRUE;
 625 }
 626
 627 static int
 628 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 629 {
 630    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 631    xcb_dri2_authenticate_reply_t *authenticate;
 632    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 633    xcb_screen_iterator_t s;
 634    xcb_screen_t *screen;
 635    int ret = 0;
 636
 637    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 638
 639    screen = get_xcb_screen(s, dri2_dpy->screen);
 640    if (!screen) {
 641       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 642       return -1;
 643    }
 644
 645    authenticate_cookie =
 646       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 647    authenticate =
 648       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 649
 650    if (authenticate == NULL || !authenticate->authenticated)
 651       ret = -1;
 652
 653    free(authenticate);
 654
 655    return ret;
 656 }
 657
 658 static EGLBoolean
 659 dri2_x11_local_authenticate(_EGLDisplay *disp)
 660 {
 661 #ifdef HAVE_LIBDRM
 662    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 663    drm_magic_t magic;
 664
 665    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 666       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 667       return EGL_FALSE;
 668    }
 669
 670    if (dri2_x11_authenticate(disp, magic) < 0) {
 671       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 672       return EGL_FALSE;
 673    }
 674 #endif
 675    return EGL_TRUE;
 676 }
 677
 678 static EGLBoolean
 679 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 680                                  _EGLDisplay *disp)
 681 {
 682    xcb_screen_iterator_t s;
 683    xcb_depth_iterator_t d;
 684    xcb_visualtype_t *visuals;
 685    int i, j, id;
 686    unsigned int rgba_masks[4];
 687    EGLint surface_type;
 688    EGLint config_attrs[] = {
 689            EGL_NATIVE_VISUAL_ID,   0,
 690            EGL_NATIVE_VISUAL_TYPE, 0,
 691            EGL_NONE
 692    };
 693
 694    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 695    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 696    id = 1;
 697
 698    surface_type =
 699       EGL_WINDOW_BIT |
 700       EGL_PIXMAP_BIT |
 701       EGL_PBUFFER_BIT |
 702       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 703
 704    while (d.rem > 0) {
 705       EGLBoolean class_added[6] = { 0, };
 706
 707       visuals = xcb_depth_visuals(d.data);
 708       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 709          if (class_added[visuals[i]._class])
 710             continue;
 711
 712          class_added[visuals[i]._class] = EGL_TRUE;
 713          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 714             config_attrs[1] = visuals[i].visual_id;
 715             config_attrs[3] = visuals[i]._class;
 716
 717             rgba_masks[0] = visuals[i].red_mask;
 718             rgba_masks[1] = visuals[i].green_mask;
 719             rgba_masks[2] = visuals[i].blue_mask;
 720             rgba_masks[3] = 0;
 721             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 722                             surface_type, config_attrs, rgba_masks);
 723
 724             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 725              * Otherwise it will only match a 32-bit RGBA visual.  On a
 726              * composited window manager on X11, this will make all of the
 727              * EGLConfigs with destination alpha get blended by the
 728              * compositor.  This is probably not what the application
 729              * wants... especially on drivers that only have 32-bit RGBA
 730              * EGLConfigs! */
 731             if (d.data->depth == 24) {
 732                rgba_masks[3] =
 733                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 734                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 735                                surface_type, config_attrs, rgba_masks);
 736             }
 737          }
 738       }
 739
 740       xcb_depth_next(&d);
 741    }
 742
 743    if (!_eglGetArraySize(disp->Configs)) {
 744       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 745       return EGL_FALSE;
 746    }
 747
 748    return EGL_TRUE;
 749 }
 750
 751 static EGLBoolean
 752 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 753                  _EGLSurface *draw, xcb_xfixes_region_t region)
 754 {
 755    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 756    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 757    enum xcb_dri2_attachment_t render_attachment;
 758    xcb_dri2_copy_region_cookie_t cookie;
 759
 760    /* No-op for a pixmap or pbuffer surface */
 761    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 762       return EGL_TRUE;
 763
 764    if (dri2_dpy->flush)
 765       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 766
 767    if (dri2_surf->have_fake_front)
 768       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 769    else
 770       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 771
 772    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 773                                            dri2_surf->drawable,
 774                                            region,
 775                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 776                                            render_attachment);
 777    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 778
 779    return EGL_TRUE;
 780 }
 781
 782 static int64_t
 783 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 784                           int64_t msc, int64_t divisor, int64_t remainder)
 785 {
 786    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 787    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 788    uint32_t msc_hi = msc >> 32;
 789    uint32_t msc_lo = msc & 0xffffffff;
 790    uint32_t divisor_hi = divisor >> 32;
 791    uint32_t divisor_lo = divisor & 0xffffffff;
 792    uint32_t remainder_hi = remainder >> 32;
 793    uint32_t remainder_lo = remainder & 0xffffffff;
 794    xcb_dri2_swap_buffers_cookie_t cookie;
 795    xcb_dri2_swap_buffers_reply_t *reply;
 796    int64_t swap_count = -1;
 797
 798    /* No-op for a pixmap or pbuffer surface */
 799    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 800       return 0;
 801
 802    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 803       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 804
 805    dri2_flush_drawable_for_swapbuffers(disp, draw);
 806
 807    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 808                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 809
 810    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 811
 812    if (reply) {
 813       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 814       free(reply);
 815    }
 816
 817    /* Since we aren't watching for the server's invalidate events like we're
 818     * supposed to (due to XCB providing no mechanism for filtering the events
 819     * the way xlib does), and SwapBuffers is a common cause of invalidate
 820     * events, just shove one down to the driver, even though we haven't told
 821     * the driver that we're the kind of loader that provides reliable
 822     * invalidate events.  This causes the driver to request buffers again at
 823     * its next draw, so that we get the correct buffers if a pageflip
 824     * happened.  The driver should still be using the viewport hack to catch
 825     * window resizes.
 826     */
 827    if (dri2_dpy->flush &&
 828        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 829       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 830
 831    return swap_count;
 832 }
 833
 834 static EGLBoolean
 835 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 836 {
 837    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 838    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 839
 840    if (dri2_dpy->dri2) {
 841       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 842    } else {
 843       assert(dri2_dpy->swrast);
 844
 845       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 846       return EGL_TRUE;
 847    }
 848 }
 849
 850 static EGLBoolean
 851 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 852                              _EGLSurface *draw,
 853                              EGLint numRects, const EGLint *rects)
 854 {
 855    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 856    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 857    EGLBoolean ret;
 858    xcb_xfixes_region_t region;
 859    xcb_rectangle_t rectangles[16];
 860    int i;
 861
 862    if (numRects > (int)ARRAY_SIZE(rectangles))
 863       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 864
 865    for (i = 0; i < numRects; i++) {
 866       rectangles[i].x = rects[i * 4];
 867       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 868       rectangles[i].width = rects[i * 4 + 2];
 869       rectangles[i].height = rects[i * 4 + 3];
 870    }
 871
 872    region = xcb_generate_id(dri2_dpy->conn);
 873    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 874    ret = dri2_copy_region(drv, disp, draw, region);
 875    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 876
 877    return ret;
 878 }
 879
 880 static EGLBoolean
 881 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 882                      EGLint x, EGLint y, EGLint width, EGLint height)
 883 {
 884    const EGLint rect[4] = { x, y, width, height };
 885
 886    if (x < 0 || y < 0 || width < 0 || height < 0)
 887       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 888
 889    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 890 }
 891
 892 static EGLBoolean
 893 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 894                        EGLint interval)
 895 {
 896    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 897    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 898
 899    if (interval > surf->Config->MaxSwapInterval)
 900       interval = surf->Config->MaxSwapInterval;
 901    else if (interval < surf->Config->MinSwapInterval)
 902       interval = surf->Config->MinSwapInterval;
 903
 904    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 905       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 906
 907    surf->SwapInterval = interval;
 908
 909    return EGL_TRUE;
 910 }
 911
 912 static EGLBoolean
 913 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 914                       void *native_pixmap_target)
 915 {
 916    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 917    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 918    xcb_gcontext_t gc;
 919    xcb_pixmap_t target;
 920
 921    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 922    target = (uintptr_t) native_pixmap_target;
 923
 924    (void) drv;
 925
 926    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 927
 928    gc = xcb_generate_id(dri2_dpy->conn);
 929    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 930    xcb_copy_area(dri2_dpy->conn,
 931                   dri2_surf->drawable,
 932                   target,
 933                   gc,
 934                   0, 0,
 935                   0, 0,
 936                   dri2_surf->base.Width,
 937                   dri2_surf->base.Height);
 938    xcb_free_gc(dri2_dpy->conn, gc);
 939
 940    return EGL_TRUE;
 941 }
 942
 943 static _EGLImage *
 944 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 945                              EGLClientBuffer buffer, const EGLint *attr_list)
 946 {
 947    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 948    struct dri2_egl_image *dri2_img;
 949    unsigned int attachments[1];
 950    xcb_drawable_t drawable;
 951    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 952    xcb_dri2_get_buffers_reply_t *buffers_reply;
 953    xcb_dri2_dri2_buffer_t *buffers;
 954    xcb_get_geometry_cookie_t geometry_cookie;
 955    xcb_get_geometry_reply_t *geometry_reply;
 956    xcb_generic_error_t *error;
 957    int stride, format;
 958
 959    (void) ctx;
 960
 961    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 962    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 963    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 964    buffers_cookie =
 965       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 966                                       drawable, 1, 1, attachments);
 967    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 968    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 969                                                buffers_cookie, NULL);
 970    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 971    if (buffers == NULL) {
 972       return NULL;
 973    }
 974
 975    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 976                                             geometry_cookie, &error);
 977    if (geometry_reply == NULL || error != NULL) {
 978       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 979       free(error);
 980       free(buffers_reply);
 981       return NULL;
 982    }
 983
 984    switch (geometry_reply->depth) {
 985    case 16:
 986       format = __DRI_IMAGE_FORMAT_RGB565;
 987       break;
 988    case 24:
 989       format = __DRI_IMAGE_FORMAT_XRGB8888;
 990       break;
 991    case 32:
 992       format = __DRI_IMAGE_FORMAT_ARGB8888;
 993       break;
 994    default:
 995       _eglError(EGL_BAD_PARAMETER,
 996                 "dri2_create_image_khr: unsupported pixmap depth");
 997       free(buffers_reply);
 998       free(geometry_reply);
 999       return NULL;
1000    }
1001
1002    dri2_img = malloc(sizeof *dri2_img);
1003    if (!dri2_img) {
1004       free(buffers_reply);
1005       free(geometry_reply);
1006       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1007       return EGL_NO_IMAGE_KHR;
1008    }
1009
1010    if (!_eglInitImage(&dri2_img->base, disp)) {
1011       free(buffers_reply);
1012       free(geometry_reply);
1013       free(dri2_img);
1014       return EGL_NO_IMAGE_KHR;
1015    }
1016
1017    stride = buffers[0].pitch / buffers[0].cpp;
1018    dri2_img->dri_image =
1019       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1020                                            buffers_reply->width,
1021                                            buffers_reply->height,
1022                                            format,
1023                                            buffers[0].name,
1024                                            stride,
1025                                            dri2_img);
1026
1027    free(buffers_reply);
1028    free(geometry_reply);
1029
1030    return &dri2_img->base;
1031 }
1032
1033 static _EGLImage *
1034 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1035                           _EGLContext *ctx, EGLenum target,
1036                           EGLClientBuffer buffer, const EGLint *attr_list)
1037 {
1038    (void) drv;
1039
1040    switch (target) {
1041    case EGL_NATIVE_PIXMAP_KHR:
1042       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1043    default:
1044       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1045    }
1046 }
1047
1048 static EGLBoolean
1049 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1050                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1051                          EGLuint64KHR *sbc)
1052 {
1053    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1054    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1055    xcb_dri2_get_msc_cookie_t cookie;
1056    xcb_dri2_get_msc_reply_t *reply;
1057
1058    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1059    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1060
1061    if (!reply) {
1062       _eglError(EGL_BAD_ACCESS, __func__);
1063       return EGL_FALSE;
1064    }
1065
1066    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1067    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1068    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1069    free(reply);
1070
1071    return EGL_TRUE;
1072 }
1073
1074 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1075    .authenticate = NULL,
1076    .create_window_surface = dri2_x11_create_window_surface,
1077    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1078    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1079    .destroy_surface = dri2_x11_destroy_surface,
1080    .create_image = dri2_fallback_create_image_khr,
1081    .swap_interval = dri2_fallback_swap_interval,
1082    .swap_buffers = dri2_x11_swap_buffers,
1083    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1084    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1085    .copy_buffers = dri2_x11_copy_buffers,
1086    .query_buffer_age = dri2_fallback_query_buffer_age,
1087    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1088    .get_sync_values = dri2_fallback_get_sync_values,
1089 };
1090
1091 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1092    .authenticate = dri2_x11_authenticate,
1093    .create_window_surface = dri2_x11_create_window_surface,
1094    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1095    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1096    .destroy_surface = dri2_x11_destroy_surface,
1097    .create_image = dri2_x11_create_image_khr,
1098    .swap_interval = dri2_x11_swap_interval,
1099    .swap_buffers = dri2_x11_swap_buffers,
1100    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1101    .swap_buffers_region = dri2_x11_swap_buffers_region,
1102    .post_sub_buffer = dri2_x11_post_sub_buffer,
1103    .copy_buffers = dri2_x11_copy_buffers,
1104    .query_buffer_age = dri2_fallback_query_buffer_age,
1105    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1106    .get_sync_values = dri2_x11_get_sync_values,
1107 };
1108
1109 static EGLBoolean
1110 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1111 {
1112    struct dri2_egl_display *dri2_dpy;
1113
1114    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1115    if (!dri2_dpy)
1116       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1117
1118    disp->DriverData = (void *) dri2_dpy;
1119    if (disp->PlatformDisplay == NULL) {
1120       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1121       dri2_dpy->own_device = true;
1122    } else {
1123       Display *dpy = disp->PlatformDisplay;
1124
1125       dri2_dpy->conn = XGetXCBConnection(dpy);
1126       dri2_dpy->screen = DefaultScreen(dpy);
1127    }
1128
1129    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1130       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1131       goto cleanup_dpy;
1132    }
1133
1134    /*
1135     * Every hardware driver_name is set using strdup. Doing the same in
1136     * here will allow is to simply free the memory at dri2_terminate().
1137     */
1138    dri2_dpy->driver_name = strdup("swrast");
1139    if (!dri2_load_driver_swrast(disp))
1140       goto cleanup_conn;
1141
1142    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1143    dri2_dpy->swrast_loader_extension.base.version = 2;
1144    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1145    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1146    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1147
1148    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1149    dri2_dpy->extensions[1] = NULL;
1150    dri2_dpy->extensions[2] = NULL;
1151
1152    if (!dri2_create_screen(disp))
1153       goto cleanup_driver;
1154
1155    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1156       goto cleanup_configs;
1157
1158    /* Fill vtbl last to prevent accidentally calling virtual function during
1159     * initialization.
1160     */
1161    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1162
1163    return EGL_TRUE;
1164
1165  cleanup_configs:
1166    _eglCleanupDisplay(disp);
1167    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1168  cleanup_driver:
1169    dlclose(dri2_dpy->driver);
1170  cleanup_conn:
1171    free(dri2_dpy->driver_name);
1172    if (disp->PlatformDisplay == NULL)
1173       xcb_disconnect(dri2_dpy->conn);
1174  cleanup_dpy:
1175    free(dri2_dpy);
1176
1177    return EGL_FALSE;
1178 }
1179
1180 static void
1181 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1182 {
1183    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1184    int arbitrary_max_interval = 1000;
1185
1186    /* default behavior for no SwapBuffers support: no vblank syncing
1187     * either.
1188     */
1189    dri2_dpy->min_swap_interval = 0;
1190    dri2_dpy->max_swap_interval = 0;
1191
1192    if (!dri2_dpy->swap_available)
1193       return;
1194
1195    /* If we do have swapbuffers, then we can support pretty much any swap
1196     * interval, but we allow driconf to override applications.
1197     */
1198    if (dri2_dpy->config)
1199       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1200                                      "vblank_mode", &vblank_mode);
1201    switch (vblank_mode) {
1202    case DRI_CONF_VBLANK_NEVER:
1203       dri2_dpy->min_swap_interval = 0;
1204       dri2_dpy->max_swap_interval = 0;
1205       dri2_dpy->default_swap_interval = 0;
1206       break;
1207    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1208       dri2_dpy->min_swap_interval = 1;
1209       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1210       dri2_dpy->default_swap_interval = 1;
1211       break;
1212    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1213       dri2_dpy->min_swap_interval = 0;
1214       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1215       dri2_dpy->default_swap_interval = 0;
1216       break;
1217    default:
1218    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1219       dri2_dpy->min_swap_interval = 0;
1220       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1221       dri2_dpy->default_swap_interval = 1;
1222       break;
1223    }
1224 }
1225
1226 static EGLBoolean
1227 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1228 {
1229    struct dri2_egl_display *dri2_dpy;
1230
1231    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1232    if (!dri2_dpy)
1233       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1234
1235    disp->DriverData = (void *) dri2_dpy;
1236    if (disp->PlatformDisplay == NULL) {
1237       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1238       dri2_dpy->own_device = true;
1239    } else {
1240       Display *dpy = disp->PlatformDisplay;
1241
1242       dri2_dpy->conn = XGetXCBConnection(dpy);
1243       dri2_dpy->screen = DefaultScreen(dpy);
1244    }
1245
1246    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1247       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1248       goto cleanup_dpy;
1249    }
1250
1251    if (!dri2_x11_connect(dri2_dpy))
1252       goto cleanup_conn;
1253
1254    if (!dri2_x11_local_authenticate(disp))
1255       goto cleanup_fd;
1256
1257    if (!dri2_load_driver(disp))
1258       goto cleanup_fd;
1259
1260    if (dri2_dpy->dri2_minor >= 1) {
1261       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1262       dri2_dpy->dri2_loader_extension.base.version = 3;
1263       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1264       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1265       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1266          dri2_x11_get_buffers_with_format;
1267    } else {
1268       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1269       dri2_dpy->dri2_loader_extension.base.version = 2;
1270       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1271       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1272       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1273    }
1274
1275    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1276    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1277    dri2_dpy->extensions[2] = NULL;
1278
1279    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1280    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1281
1282    if (!dri2_create_screen(disp))
1283       goto cleanup_driver;
1284
1285    dri2_x11_setup_swap_interval(dri2_dpy);
1286
1287    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1288    disp->Extensions.NOK_swap_region = EGL_TRUE;
1289    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1290    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1291    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1292
1293 #ifdef HAVE_WAYLAND_PLATFORM
1294    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1295 #endif
1296
1297    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1298       goto cleanup_configs;
1299
1300    /* Fill vtbl last to prevent accidentally calling virtual function during
1301     * initialization.
1302     */
1303    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1304
1305    return EGL_TRUE;
1306
1307  cleanup_configs:
1308    _eglCleanupDisplay(disp);
1309    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1310  cleanup_driver:
1311    dlclose(dri2_dpy->driver);
1312  cleanup_fd:
1313    close(dri2_dpy->fd);
1314  cleanup_conn:
1315    if (disp->PlatformDisplay == NULL)
1316       xcb_disconnect(dri2_dpy->conn);
1317  cleanup_dpy:
1318    free(dri2_dpy);
1319
1320    return EGL_FALSE;
1321 }
1322
1323 EGLBoolean
1324 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1325 {
1326    EGLBoolean initialized = EGL_TRUE;
1327
1328    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1329
1330    if (x11_dri2_accel) {
1331       if (!dri2_initialize_x11_dri2(drv, disp)) {
1332          initialized = dri2_initialize_x11_swrast(drv, disp);
1333       }
1334    } else {
1335       initialized = dri2_initialize_x11_swrast(drv, disp);
1336    }
1337
1338    return initialized;
1339 }
1340