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_NATIVE_WINDOW, "dri2_create_surface");
 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       dri2_surf->drawable = drawable;
 239    }
 240
 241    if (dri2_dpy->dri2) {
 242       dri2_surf->dri_drawable =
 243          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 244                                                type == EGL_WINDOW_BIT ?
 245                                                dri2_conf->dri_double_config :
 246                                                dri2_conf->dri_single_config,
 247                                                dri2_surf);
 248    } else {
 249       assert(dri2_dpy->swrast);
 250       dri2_surf->dri_drawable =
 251          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 252                                                  dri2_conf->dri_double_config,
 253                                                  dri2_surf);
 254    }
 255
 256    if (dri2_surf->dri_drawable == NULL) {
 257       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 258       goto cleanup_pixmap;
 259    }
 260
 261    if (type != EGL_PBUFFER_BIT) {
 262       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 263       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 264       if (reply == NULL || error != NULL) {
 265          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 266          free(error);
 267          goto cleanup_dri_drawable;
 268       }
 269
 270       dri2_surf->base.Width = reply->width;
 271       dri2_surf->base.Height = reply->height;
 272       dri2_surf->depth = reply->depth;
 273       free(reply);
 274    }
 275
 276    if (dri2_dpy->dri2) {
 277       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 278    } else {
 279       if (type == EGL_PBUFFER_BIT) {
 280          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 281       }
 282       swrastCreateDrawable(dri2_dpy, dri2_surf);
 283    }
 284
 285    /* we always copy the back buffer to front */
 286    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 287
 288    return &dri2_surf->base;
 289
 290  cleanup_dri_drawable:
 291    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 292  cleanup_pixmap:
 293    if (type == EGL_PBUFFER_BIT)
 294       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 295  cleanup_surf:
 296    free(dri2_surf);
 297
 298    return NULL;
 299 }
 300
 301 /**
 302  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 303  */
 304 static _EGLSurface *
 305 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 306                                _EGLConfig *conf, void *native_window,
 307                                const EGLint *attrib_list)
 308 {
 309    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 310    _EGLSurface *surf;
 311
 312    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 313                                   native_window, attrib_list);
 314    if (surf != NULL) {
 315       /* When we first create the DRI2 drawable, its swap interval on the
 316        * server side is 1.
 317        */
 318       surf->SwapInterval = 1;
 319
 320       /* Override that with a driconf-set value. */
 321       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 322    }
 323
 324    return surf;
 325 }
 326
 327 static _EGLSurface *
 328 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 329                                _EGLConfig *conf, void *native_pixmap,
 330                                const EGLint *attrib_list)
 331 {
 332    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 333                                   native_pixmap, attrib_list);
 334 }
 335
 336 static _EGLSurface *
 337 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 338                                 _EGLConfig *conf, const EGLint *attrib_list)
 339 {
 340    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 341                                   XCB_WINDOW_NONE, attrib_list);
 342 }
 343
 344 static EGLBoolean
 345 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 346 {
 347    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 348    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 349
 350    (void) drv;
 351
 352    if (!_eglPutSurface(surf))
 353       return EGL_TRUE;
 354
 355    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 356
 357    if (dri2_dpy->dri2) {
 358       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 359    } else {
 360       assert(dri2_dpy->swrast);
 361       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 362    }
 363
 364    if (surf->Type == EGL_PBUFFER_BIT)
 365       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 366
 367    free(surf);
 368
 369    return EGL_TRUE;
 370 }
 371
 372 /**
 373  * Process list of buffer received from the server
 374  *
 375  * Processes the list of buffers received in a reply from the server to either
 376  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 377  */
 378 static void
 379 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 380                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 381 {
 382    struct dri2_egl_display *dri2_dpy =
 383       dri2_egl_display(dri2_surf->base.Resource.Display);
 384    xcb_rectangle_t rectangle;
 385    unsigned i;
 386
 387    dri2_surf->buffer_count = count;
 388    dri2_surf->have_fake_front = 0;
 389
 390    /* This assumes the DRI2 buffer attachment tokens matches the
 391     * __DRIbuffer tokens. */
 392    for (i = 0; i < count; i++) {
 393       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 394       dri2_surf->buffers[i].name = buffers[i].name;
 395       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 396       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 397       dri2_surf->buffers[i].flags = buffers[i].flags;
 398
 399       /* We only use the DRI drivers single buffer configs.  This
 400        * means that if we try to render to a window, DRI2 will give us
 401        * the fake front buffer, which we'll use as a back buffer.
 402        * Note that EGL doesn't require that several clients rendering
 403        * to the same window must see the same aux buffers. */
 404       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 405          dri2_surf->have_fake_front = 1;
 406    }
 407
 408    if (dri2_surf->region != XCB_NONE)
 409       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 410
 411    rectangle.x = 0;
 412    rectangle.y = 0;
 413    rectangle.width = dri2_surf->base.Width;
 414    rectangle.height = dri2_surf->base.Height;
 415    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 416    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 417 }
 418
 419 static __DRIbuffer *
 420 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 421                      int *width, int *height,
 422                      unsigned int *attachments, int count,
 423                      int *out_count, void *loaderPrivate)
 424 {
 425    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 426    struct dri2_egl_display *dri2_dpy =
 427       dri2_egl_display(dri2_surf->base.Resource.Display);
 428    xcb_dri2_dri2_buffer_t *buffers;
 429    xcb_dri2_get_buffers_reply_t *reply;
 430    xcb_dri2_get_buffers_cookie_t cookie;
 431
 432    (void) driDrawable;
 433
 434    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 435                                             dri2_surf->drawable,
 436                                             count, count, attachments);
 437    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 438    buffers = xcb_dri2_get_buffers_buffers (reply);
 439    if (buffers == NULL)
 440       return NULL;
 441
 442    *out_count = reply->count;
 443    dri2_surf->base.Width = *width = reply->width;
 444    dri2_surf->base.Height = *height = reply->height;
 445    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 446
 447    free(reply);
 448
 449    return dri2_surf->buffers;
 450 }
 451
 452 static __DRIbuffer *
 453 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 454                                  int *width, int *height,
 455                                  unsigned int *attachments, int count,
 456                                  int *out_count, void *loaderPrivate)
 457 {
 458    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 459    struct dri2_egl_display *dri2_dpy =
 460       dri2_egl_display(dri2_surf->base.Resource.Display);
 461    xcb_dri2_dri2_buffer_t *buffers;
 462    xcb_dri2_get_buffers_with_format_reply_t *reply;
 463    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 464    xcb_dri2_attach_format_t *format_attachments;
 465
 466    (void) driDrawable;
 467
 468    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 469    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 470                                                         dri2_surf->drawable,
 471                                                         count, count,
 472                                                         format_attachments);
 473
 474    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 475                                                    cookie, NULL);
 476    if (reply == NULL)
 477       return NULL;
 478
 479    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 480    dri2_surf->base.Width = *width = reply->width;
 481    dri2_surf->base.Height = *height = reply->height;
 482    *out_count = reply->count;
 483    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 484
 485    free(reply);
 486
 487    return dri2_surf->buffers;
 488 }
 489
 490 static void
 491 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 492 {
 493    (void) driDrawable;
 494
 495    /* FIXME: Does EGL support front buffer rendering at all? */
 496
 497 #if 0
 498    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 499
 500    dri2WaitGL(dri2_surf);
 501 #else
 502    (void) loaderPrivate;
 503 #endif
 504 }
 505
 506 static EGLBoolean
 507 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 508 {
 509    xcb_xfixes_query_version_reply_t *xfixes_query;
 510    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 511    xcb_dri2_query_version_reply_t *dri2_query;
 512    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 513    xcb_dri2_connect_reply_t *connect;
 514    xcb_dri2_connect_cookie_t connect_cookie;
 515    xcb_generic_error_t *error;
 516    xcb_screen_iterator_t s;
 517    xcb_screen_t *screen;
 518    char *driver_name, *device_name;
 519    const xcb_query_extension_reply_t *extension;
 520
 521    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 522    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 523
 524    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 525    if (!(extension && extension->present))
 526       return EGL_FALSE;
 527
 528    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 529    if (!(extension && extension->present))
 530       return EGL_FALSE;
 531
 532    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 533                                                   XCB_XFIXES_MAJOR_VERSION,
 534                                                   XCB_XFIXES_MINOR_VERSION);
 535
 536    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 537                                                XCB_DRI2_MAJOR_VERSION,
 538                                                XCB_DRI2_MINOR_VERSION);
 539
 540    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 541    screen = get_xcb_screen(s, dri2_dpy->screen);
 542    if (!screen) {
 543       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_connect");
 544       return EGL_FALSE;
 545    }
 546    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 547                                    XCB_DRI2_DRIVER_TYPE_DRI);
 548
 549    xfixes_query =
 550       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 551                                       xfixes_query_cookie, &error);
 552    if (xfixes_query == NULL ||
 553        error != NULL || xfixes_query->major_version < 2) {
 554       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 555       free(error);
 556       return EGL_FALSE;
 557    }
 558    free(xfixes_query);
 559
 560    dri2_query =
 561       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 562    if (dri2_query == NULL || error != NULL) {
 563       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 564       free(error);
 565       return EGL_FALSE;
 566    }
 567    dri2_dpy->dri2_major = dri2_query->major_version;
 568    dri2_dpy->dri2_minor = dri2_query->minor_version;
 569    free(dri2_query);
 570
 571    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 572    if (connect == NULL ||
 573        connect->driver_name_length + connect->device_name_length == 0) {
 574       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 575       return EGL_FALSE;
 576    }
 577
 578    driver_name = xcb_dri2_connect_driver_name (connect);
 579    dri2_dpy->driver_name =
 580       strndup(driver_name,
 581               xcb_dri2_connect_driver_name_length(connect));
 582
 583    device_name = xcb_dri2_connect_device_name (connect);
 584
 585    dri2_dpy->device_name =
 586       strndup(device_name,
 587               xcb_dri2_connect_device_name_length(connect));
 588
 589    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 590       free(dri2_dpy->device_name);
 591       free(dri2_dpy->driver_name);
 592       free(connect);
 593       return EGL_FALSE;
 594    }
 595    free(connect);
 596
 597    return EGL_TRUE;
 598 }
 599
 600 static int
 601 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 602 {
 603    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 604    xcb_dri2_authenticate_reply_t *authenticate;
 605    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 606    xcb_screen_iterator_t s;
 607    xcb_screen_t *screen;
 608    int ret = 0;
 609
 610    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 611
 612    screen = get_xcb_screen(s, dri2_dpy->screen);
 613    if (!screen) {
 614       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_authenticate");
 615       return -1;
 616    }
 617
 618    authenticate_cookie =
 619       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 620    authenticate =
 621       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 622
 623    if (authenticate == NULL || !authenticate->authenticated)
 624       ret = -1;
 625
 626    free(authenticate);
 627
 628    return ret;
 629 }
 630
 631 static EGLBoolean
 632 dri2_x11_local_authenticate(_EGLDisplay *disp)
 633 {
 634 #ifdef HAVE_LIBDRM
 635    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 636    drm_magic_t magic;
 637
 638    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 639       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 640       return EGL_FALSE;
 641    }
 642
 643    if (dri2_x11_authenticate(disp, magic) < 0) {
 644       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 645       return EGL_FALSE;
 646    }
 647 #endif
 648    return EGL_TRUE;
 649 }
 650
 651 static EGLBoolean
 652 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 653                                  _EGLDisplay *disp)
 654 {
 655    xcb_screen_iterator_t s;
 656    xcb_depth_iterator_t d;
 657    xcb_visualtype_t *visuals;
 658    int i, j, id;
 659    unsigned int rgba_masks[4];
 660    EGLint surface_type;
 661    EGLint config_attrs[] = {
 662            EGL_NATIVE_VISUAL_ID,   0,
 663            EGL_NATIVE_VISUAL_TYPE, 0,
 664            EGL_NONE
 665    };
 666
 667    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 668    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 669    id = 1;
 670
 671    surface_type =
 672       EGL_WINDOW_BIT |
 673       EGL_PIXMAP_BIT |
 674       EGL_PBUFFER_BIT |
 675       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 676
 677    while (d.rem > 0) {
 678       EGLBoolean class_added[6] = { 0, };
 679
 680       visuals = xcb_depth_visuals(d.data);
 681       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 682          if (class_added[visuals[i]._class])
 683             continue;
 684
 685          class_added[visuals[i]._class] = EGL_TRUE;
 686          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 687             config_attrs[1] = visuals[i].visual_id;
 688             config_attrs[3] = visuals[i]._class;
 689
 690             rgba_masks[0] = visuals[i].red_mask;
 691             rgba_masks[1] = visuals[i].green_mask;
 692             rgba_masks[2] = visuals[i].blue_mask;
 693             rgba_masks[3] = 0;
 694             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 695                             surface_type, config_attrs, rgba_masks);
 696
 697             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 698              * Otherwise it will only match a 32-bit RGBA visual.  On a
 699              * composited window manager on X11, this will make all of the
 700              * EGLConfigs with destination alpha get blended by the
 701              * compositor.  This is probably not what the application
 702              * wants... especially on drivers that only have 32-bit RGBA
 703              * EGLConfigs! */
 704             if (d.data->depth == 24) {
 705                rgba_masks[3] =
 706                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 707                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 708                                surface_type, config_attrs, rgba_masks);
 709             }
 710          }
 711       }
 712
 713       xcb_depth_next(&d);
 714    }
 715
 716    if (!_eglGetArraySize(disp->Configs)) {
 717       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 718       return EGL_FALSE;
 719    }
 720
 721    return EGL_TRUE;
 722 }
 723
 724 static EGLBoolean
 725 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 726                  _EGLSurface *draw, xcb_xfixes_region_t region)
 727 {
 728    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 729    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 730    enum xcb_dri2_attachment_t render_attachment;
 731    xcb_dri2_copy_region_cookie_t cookie;
 732
 733    /* No-op for a pixmap or pbuffer surface */
 734    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 735       return EGL_TRUE;
 736
 737    if (dri2_dpy->flush)
 738       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 739
 740    if (dri2_surf->have_fake_front)
 741       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 742    else
 743       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 744
 745    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 746                                            dri2_surf->drawable,
 747                                            region,
 748                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 749                                            render_attachment);
 750    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 751
 752    return EGL_TRUE;
 753 }
 754
 755 static int64_t
 756 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 757                           int64_t msc, int64_t divisor, int64_t remainder)
 758 {
 759    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 760    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 761    uint32_t msc_hi = msc >> 32;
 762    uint32_t msc_lo = msc & 0xffffffff;
 763    uint32_t divisor_hi = divisor >> 32;
 764    uint32_t divisor_lo = divisor & 0xffffffff;
 765    uint32_t remainder_hi = remainder >> 32;
 766    uint32_t remainder_lo = remainder & 0xffffffff;
 767    xcb_dri2_swap_buffers_cookie_t cookie;
 768    xcb_dri2_swap_buffers_reply_t *reply;
 769    int64_t swap_count = -1;
 770
 771    /* No-op for a pixmap or pbuffer surface */
 772    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 773       return 0;
 774
 775    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 776       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 777
 778    dri2_flush_drawable_for_swapbuffers(disp, draw);
 779
 780    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 781                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 782
 783    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 784
 785    if (reply) {
 786       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 787       free(reply);
 788    }
 789
 790    /* Since we aren't watching for the server's invalidate events like we're
 791     * supposed to (due to XCB providing no mechanism for filtering the events
 792     * the way xlib does), and SwapBuffers is a common cause of invalidate
 793     * events, just shove one down to the driver, even though we haven't told
 794     * the driver that we're the kind of loader that provides reliable
 795     * invalidate events.  This causes the driver to request buffers again at
 796     * its next draw, so that we get the correct buffers if a pageflip
 797     * happened.  The driver should still be using the viewport hack to catch
 798     * window resizes.
 799     */
 800    if (dri2_dpy->flush &&
 801        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 802       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 803
 804    return swap_count;
 805 }
 806
 807 static EGLBoolean
 808 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 809 {
 810    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 811    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 812
 813    if (dri2_dpy->dri2) {
 814       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 815    } else {
 816       assert(dri2_dpy->swrast);
 817
 818       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 819       return EGL_TRUE;
 820    }
 821 }
 822
 823 static EGLBoolean
 824 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 825                              _EGLSurface *draw,
 826                              EGLint numRects, const EGLint *rects)
 827 {
 828    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 829    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 830    EGLBoolean ret;
 831    xcb_xfixes_region_t region;
 832    xcb_rectangle_t rectangles[16];
 833    int i;
 834
 835    if (numRects > (int)ARRAY_SIZE(rectangles))
 836       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 837
 838    for (i = 0; i < numRects; i++) {
 839       rectangles[i].x = rects[i * 4];
 840       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 841       rectangles[i].width = rects[i * 4 + 2];
 842       rectangles[i].height = rects[i * 4 + 3];
 843    }
 844
 845    region = xcb_generate_id(dri2_dpy->conn);
 846    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 847    ret = dri2_copy_region(drv, disp, draw, region);
 848    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 849
 850    return ret;
 851 }
 852
 853 static EGLBoolean
 854 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 855                      EGLint x, EGLint y, EGLint width, EGLint height)
 856 {
 857    const EGLint rect[4] = { x, y, width, height };
 858
 859    if (x < 0 || y < 0 || width < 0 || height < 0)
 860       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 861
 862    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 863 }
 864
 865 static EGLBoolean
 866 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 867                        EGLint interval)
 868 {
 869    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 870    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 871
 872    if (interval > surf->Config->MaxSwapInterval)
 873       interval = surf->Config->MaxSwapInterval;
 874    else if (interval < surf->Config->MinSwapInterval)
 875       interval = surf->Config->MinSwapInterval;
 876
 877    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 878       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 879
 880    surf->SwapInterval = interval;
 881
 882    return EGL_TRUE;
 883 }
 884
 885 static EGLBoolean
 886 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 887                       void *native_pixmap_target)
 888 {
 889    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 890    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 891    xcb_gcontext_t gc;
 892    xcb_pixmap_t target;
 893
 894    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 895    target = (uintptr_t) native_pixmap_target;
 896
 897    (void) drv;
 898
 899    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 900
 901    gc = xcb_generate_id(dri2_dpy->conn);
 902    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 903    xcb_copy_area(dri2_dpy->conn,
 904                   dri2_surf->drawable,
 905                   target,
 906                   gc,
 907                   0, 0,
 908                   0, 0,
 909                   dri2_surf->base.Width,
 910                   dri2_surf->base.Height);
 911    xcb_free_gc(dri2_dpy->conn, gc);
 912
 913    return EGL_TRUE;
 914 }
 915
 916 static _EGLImage *
 917 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 918                              EGLClientBuffer buffer, const EGLint *attr_list)
 919 {
 920    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 921    struct dri2_egl_image *dri2_img;
 922    unsigned int attachments[1];
 923    xcb_drawable_t drawable;
 924    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 925    xcb_dri2_get_buffers_reply_t *buffers_reply;
 926    xcb_dri2_dri2_buffer_t *buffers;
 927    xcb_get_geometry_cookie_t geometry_cookie;
 928    xcb_get_geometry_reply_t *geometry_reply;
 929    xcb_generic_error_t *error;
 930    int stride, format;
 931
 932    (void) ctx;
 933
 934    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 935    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 936    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 937    buffers_cookie =
 938       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 939                                       drawable, 1, 1, attachments);
 940    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 941    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 942                                                buffers_cookie, NULL);
 943    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 944    if (buffers == NULL) {
 945       return NULL;
 946    }
 947
 948    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 949                                             geometry_cookie, &error);
 950    if (geometry_reply == NULL || error != NULL) {
 951       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 952       free(error);
 953       free(buffers_reply);
 954       return NULL;
 955    }
 956
 957    switch (geometry_reply->depth) {
 958    case 16:
 959       format = __DRI_IMAGE_FORMAT_RGB565;
 960       break;
 961    case 24:
 962       format = __DRI_IMAGE_FORMAT_XRGB8888;
 963       break;
 964    case 32:
 965       format = __DRI_IMAGE_FORMAT_ARGB8888;
 966       break;
 967    default:
 968       _eglError(EGL_BAD_PARAMETER,
 969                 "dri2_create_image_khr: unsupported pixmap depth");
 970       free(buffers_reply);
 971       free(geometry_reply);
 972       return NULL;
 973    }
 974
 975    dri2_img = malloc(sizeof *dri2_img);
 976    if (!dri2_img) {
 977       free(buffers_reply);
 978       free(geometry_reply);
 979       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 980       return EGL_NO_IMAGE_KHR;
 981    }
 982
 983    if (!_eglInitImage(&dri2_img->base, disp)) {
 984       free(buffers_reply);
 985       free(geometry_reply);
 986       free(dri2_img);
 987       return EGL_NO_IMAGE_KHR;
 988    }
 989
 990    stride = buffers[0].pitch / buffers[0].cpp;
 991    dri2_img->dri_image =
 992       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 993                                            buffers_reply->width,
 994                                            buffers_reply->height,
 995                                            format,
 996                                            buffers[0].name,
 997                                            stride,
 998                                            dri2_img);
 999
1000    free(buffers_reply);
1001    free(geometry_reply);
1002
1003    return &dri2_img->base;
1004 }
1005
1006 static _EGLImage *
1007 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1008                           _EGLContext *ctx, EGLenum target,
1009                           EGLClientBuffer buffer, const EGLint *attr_list)
1010 {
1011    (void) drv;
1012
1013    switch (target) {
1014    case EGL_NATIVE_PIXMAP_KHR:
1015       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1016    default:
1017       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1018    }
1019 }
1020
1021 static EGLBoolean
1022 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1023                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1024                          EGLuint64KHR *sbc)
1025 {
1026    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1027    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1028    xcb_dri2_get_msc_cookie_t cookie;
1029    xcb_dri2_get_msc_reply_t *reply;
1030
1031    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1032    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1033
1034    if (!reply) {
1035       _eglError(EGL_BAD_ACCESS, __func__);
1036       return EGL_FALSE;
1037    }
1038
1039    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1040    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1041    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1042    free(reply);
1043
1044    return EGL_TRUE;
1045 }
1046
1047 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1048    .authenticate = NULL,
1049    .create_window_surface = dri2_x11_create_window_surface,
1050    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1051    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1052    .destroy_surface = dri2_x11_destroy_surface,
1053    .create_image = dri2_fallback_create_image_khr,
1054    .swap_interval = dri2_fallback_swap_interval,
1055    .swap_buffers = dri2_x11_swap_buffers,
1056    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1057    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1058    .copy_buffers = dri2_x11_copy_buffers,
1059    .query_buffer_age = dri2_fallback_query_buffer_age,
1060    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1061    .get_sync_values = dri2_fallback_get_sync_values,
1062 };
1063
1064 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1065    .authenticate = dri2_x11_authenticate,
1066    .create_window_surface = dri2_x11_create_window_surface,
1067    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1068    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1069    .destroy_surface = dri2_x11_destroy_surface,
1070    .create_image = dri2_x11_create_image_khr,
1071    .swap_interval = dri2_x11_swap_interval,
1072    .swap_buffers = dri2_x11_swap_buffers,
1073    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1074    .swap_buffers_region = dri2_x11_swap_buffers_region,
1075    .post_sub_buffer = dri2_x11_post_sub_buffer,
1076    .copy_buffers = dri2_x11_copy_buffers,
1077    .query_buffer_age = dri2_fallback_query_buffer_age,
1078    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1079    .get_sync_values = dri2_x11_get_sync_values,
1080 };
1081
1082 static EGLBoolean
1083 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1084 {
1085    struct dri2_egl_display *dri2_dpy;
1086
1087    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1088    if (!dri2_dpy)
1089       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1090
1091    disp->DriverData = (void *) dri2_dpy;
1092    if (disp->PlatformDisplay == NULL) {
1093       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1094       dri2_dpy->own_device = true;
1095    } else {
1096       Display *dpy = disp->PlatformDisplay;
1097
1098       dri2_dpy->conn = XGetXCBConnection(dpy);
1099       dri2_dpy->screen = DefaultScreen(dpy);
1100    }
1101
1102    if (xcb_connection_has_error(dri2_dpy->conn)) {
1103       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1104       goto cleanup_dpy;
1105    }
1106
1107    /*
1108     * Every hardware driver_name is set using strdup. Doing the same in
1109     * here will allow is to simply free the memory at dri2_terminate().
1110     */
1111    dri2_dpy->driver_name = strdup("swrast");
1112    if (!dri2_load_driver_swrast(disp))
1113       goto cleanup_conn;
1114
1115    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1116    dri2_dpy->swrast_loader_extension.base.version = 2;
1117    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1118    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1119    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1120
1121    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1122    dri2_dpy->extensions[1] = NULL;
1123    dri2_dpy->extensions[2] = NULL;
1124
1125    if (!dri2_create_screen(disp))
1126       goto cleanup_driver;
1127
1128    if (dri2_dpy->conn) {
1129       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1130          goto cleanup_configs;
1131    }
1132
1133    /* Fill vtbl last to prevent accidentally calling virtual function during
1134     * initialization.
1135     */
1136    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1137
1138    return EGL_TRUE;
1139
1140  cleanup_configs:
1141    _eglCleanupDisplay(disp);
1142    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1143  cleanup_driver:
1144    dlclose(dri2_dpy->driver);
1145  cleanup_conn:
1146    free(dri2_dpy->driver_name);
1147    if (disp->PlatformDisplay == NULL)
1148       xcb_disconnect(dri2_dpy->conn);
1149  cleanup_dpy:
1150    free(dri2_dpy);
1151
1152    return EGL_FALSE;
1153 }
1154
1155 static void
1156 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1157 {
1158    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1159    int arbitrary_max_interval = 1000;
1160
1161    /* default behavior for no SwapBuffers support: no vblank syncing
1162     * either.
1163     */
1164    dri2_dpy->min_swap_interval = 0;
1165    dri2_dpy->max_swap_interval = 0;
1166
1167    if (!dri2_dpy->swap_available)
1168       return;
1169
1170    /* If we do have swapbuffers, then we can support pretty much any swap
1171     * interval, but we allow driconf to override applications.
1172     */
1173    if (dri2_dpy->config)
1174       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1175                                      "vblank_mode", &vblank_mode);
1176    switch (vblank_mode) {
1177    case DRI_CONF_VBLANK_NEVER:
1178       dri2_dpy->min_swap_interval = 0;
1179       dri2_dpy->max_swap_interval = 0;
1180       dri2_dpy->default_swap_interval = 0;
1181       break;
1182    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1183       dri2_dpy->min_swap_interval = 1;
1184       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1185       dri2_dpy->default_swap_interval = 1;
1186       break;
1187    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1188       dri2_dpy->min_swap_interval = 0;
1189       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1190       dri2_dpy->default_swap_interval = 0;
1191       break;
1192    default:
1193    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1194       dri2_dpy->min_swap_interval = 0;
1195       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1196       dri2_dpy->default_swap_interval = 1;
1197       break;
1198    }
1199 }
1200
1201 static EGLBoolean
1202 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1203 {
1204    struct dri2_egl_display *dri2_dpy;
1205
1206    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1207    if (!dri2_dpy)
1208       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1209
1210    disp->DriverData = (void *) dri2_dpy;
1211    if (disp->PlatformDisplay == NULL) {
1212       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1213       dri2_dpy->own_device = true;
1214    } else {
1215       Display *dpy = disp->PlatformDisplay;
1216
1217       dri2_dpy->conn = XGetXCBConnection(dpy);
1218       dri2_dpy->screen = DefaultScreen(dpy);
1219    }
1220
1221    if (xcb_connection_has_error(dri2_dpy->conn)) {
1222       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1223       goto cleanup_dpy;
1224    }
1225
1226    if (dri2_dpy->conn) {
1227       if (!dri2_x11_connect(dri2_dpy))
1228          goto cleanup_conn;
1229    }
1230
1231    if (!dri2_load_driver(disp))
1232       goto cleanup_conn;
1233
1234    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
1235    if (dri2_dpy->fd == -1) {
1236       _eglLog(_EGL_WARNING,
1237               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1238               strerror(errno));
1239       goto cleanup_driver;
1240    }
1241
1242    if (dri2_dpy->conn) {
1243       if (!dri2_x11_local_authenticate(disp))
1244          goto cleanup_fd;
1245    }
1246
1247    if (dri2_dpy->dri2_minor >= 1) {
1248       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1249       dri2_dpy->dri2_loader_extension.base.version = 3;
1250       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1251       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1252       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1253          dri2_x11_get_buffers_with_format;
1254    } else {
1255       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1256       dri2_dpy->dri2_loader_extension.base.version = 2;
1257       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1258       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1259       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1260    }
1261
1262    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1263    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1264    dri2_dpy->extensions[2] = NULL;
1265
1266    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1267    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1268
1269    if (!dri2_create_screen(disp))
1270       goto cleanup_fd;
1271
1272    dri2_x11_setup_swap_interval(dri2_dpy);
1273
1274    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1275    disp->Extensions.NOK_swap_region = EGL_TRUE;
1276    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1277    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1278    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1279
1280 #ifdef HAVE_WAYLAND_PLATFORM
1281    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1282 #endif
1283
1284    if (dri2_dpy->conn) {
1285       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1286          goto cleanup_configs;
1287    }
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