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 #include "util/debug.h"
  44 #include "util/macros.h"
  45
  46 #include "egl_dri2.h"
  47 #include "egl_dri2_fallbacks.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 static void
  59 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  60                      struct dri2_egl_surface * dri2_surf)
  61 {
  62    uint32_t           mask;
  63    const uint32_t     function = GXcopy;
  64    uint32_t           valgc[2];
  65
  66    /* create GC's */
  67    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  68    mask = XCB_GC_FUNCTION;
  69    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  70
  71    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  72    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  73    valgc[0] = function;
  74    valgc[1] = False;
  75    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  76    switch (dri2_surf->depth) {
  77       case 32:
  78       case 30:
  79       case 24:
  80          dri2_surf->bytes_per_pixel = 4;
  81          break;
  82       case 16:
  83          dri2_surf->bytes_per_pixel = 2;
  84          break;
  85       case 8:
  86          dri2_surf->bytes_per_pixel = 1;
  87          break;
  88       case 0:
  89          dri2_surf->bytes_per_pixel = 0;
  90          break;
  91       default:
  92          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  93    }
  94 }
  95
  96 static void
  97 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  98                       struct dri2_egl_surface * dri2_surf)
  99 {
 100    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 101    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 102 }
 103
 104 static bool
 105 x11_get_drawable_info(__DRIdrawable * draw,
 106                       int *x, int *y, int *w, int *h,
 107                       void *loaderPrivate)
 108 {
 109    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 110    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 111
 112    xcb_get_geometry_cookie_t cookie;
 113    xcb_get_geometry_reply_t *reply;
 114    xcb_generic_error_t *error;
 115    bool ret;
 116
 117    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 118    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 119    if (reply == NULL)
 120       return false;
 121
 122    if (error != NULL) {
 123       ret = false;
 124       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 125       free(error);
 126    } else {
 127       *x = reply->x;
 128       *y = reply->y;
 129       *w = reply->width;
 130       *h = reply->height;
 131       ret = true;
 132    }
 133    free(reply);
 134    return ret;
 135 }
 136
 137 static void
 138 swrastGetDrawableInfo(__DRIdrawable * draw,
 139                       int *x, int *y, int *w, int *h,
 140                       void *loaderPrivate)
 141 {
 142    *x = *y = *w = *h = 0;
 143    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 144 }
 145
 146 static void
 147 swrastPutImage(__DRIdrawable * draw, int op,
 148                int x, int y, int w, int h,
 149                char *data, void *loaderPrivate)
 150 {
 151    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 152    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 153
 154    xcb_gcontext_t gc;
 155
 156    switch (op) {
 157    case __DRI_SWRAST_IMAGE_OP_DRAW:
 158       gc = dri2_surf->gc;
 159       break;
 160    case __DRI_SWRAST_IMAGE_OP_SWAP:
 161       gc = dri2_surf->swapgc;
 162       break;
 163    default:
 164       return;
 165    }
 166
 167    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 168                  gc, w, h, x, y, 0, dri2_surf->depth,
 169                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 170 }
 171
 172 static void
 173 swrastGetImage(__DRIdrawable * read,
 174                int x, int y, int w, int h,
 175                char *data, void *loaderPrivate)
 176 {
 177    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 178    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 179
 180    xcb_get_image_cookie_t cookie;
 181    xcb_get_image_reply_t *reply;
 182    xcb_generic_error_t *error;
 183
 184    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 185                            dri2_surf->drawable, x, y, w, h, ~0);
 186    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 187    if (reply == NULL)
 188       return;
 189
 190    if (error != NULL) {
 191       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 192       free(error);
 193    } else {
 194       uint32_t bytes = xcb_get_image_data_length(reply);
 195       uint8_t *idata = xcb_get_image_data(reply);
 196       memcpy(data, idata, bytes);
 197    }
 198    free(reply);
 199 }
 200
 201
 202 static xcb_screen_t *
 203 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 204 {
 205     for (; iter.rem; --screen, xcb_screen_next(&iter))
 206         if (screen == 0)
 207             return iter.data;
 208
 209     return NULL;
 210 }
 211
 212
 213 /**
 214  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 215  */
 216 static _EGLSurface *
 217 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 218                         _EGLConfig *conf, void *native_surface,
 219                         const EGLint *attrib_list)
 220 {
 221    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 222    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 223    struct dri2_egl_surface *dri2_surf;
 224    xcb_get_geometry_cookie_t cookie;
 225    xcb_get_geometry_reply_t *reply;
 226    xcb_generic_error_t *error;
 227    const __DRIconfig *config;
 228
 229    (void) drv;
 230
 231    dri2_surf = malloc(sizeof *dri2_surf);
 232    if (!dri2_surf) {
 233       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 234       return NULL;
 235    }
 236
 237    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list, false))
 238       goto cleanup_surf;
 239
 240    dri2_surf->region = XCB_NONE;
 241    if (type == EGL_PBUFFER_BIT) {
 242       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 243       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 244                        dri2_surf->drawable, dri2_dpy->screen->root,
 245                         dri2_surf->base.Width, dri2_surf->base.Height);
 246    } else {
 247       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 248       dri2_surf->drawable = (uintptr_t) native_surface;
 249    }
 250
 251    config = dri2_get_dri_config(dri2_conf, type,
 252                                 dri2_surf->base.GLColorspace);
 253
 254    if (!config) {
 255       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 256       goto cleanup_pixmap;
 257    }
 258
 259    if (dri2_dpy->dri2) {
 260       dri2_surf->dri_drawable =
 261          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 262                                            dri2_surf);
 263    } else {
 264       assert(dri2_dpy->swrast);
 265       dri2_surf->dri_drawable =
 266          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 267                                              dri2_surf);
 268    }
 269
 270    if (dri2_surf->dri_drawable == NULL) {
 271       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 272       goto cleanup_pixmap;
 273    }
 274
 275    if (type != EGL_PBUFFER_BIT) {
 276       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 277       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 278       if (error != NULL) {
 279          if (error->error_code == BadAlloc)
 280             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 281          else if (type == EGL_WINDOW_BIT)
 282             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 283          else
 284             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 285          free(error);
 286          goto cleanup_dri_drawable;
 287       } else if (reply == NULL) {
 288          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 289          goto cleanup_dri_drawable;
 290       }
 291
 292       dri2_surf->base.Width = reply->width;
 293       dri2_surf->base.Height = reply->height;
 294       dri2_surf->depth = reply->depth;
 295       free(reply);
 296    }
 297
 298    if (dri2_dpy->dri2) {
 299       xcb_void_cookie_t cookie;
 300       int conn_error;
 301
 302       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 303                                                 dri2_surf->drawable);
 304       error = xcb_request_check(dri2_dpy->conn, cookie);
 305       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 306       if (conn_error || error != NULL) {
 307          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 308             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 309          else if (type == EGL_WINDOW_BIT)
 310             _eglError(EGL_BAD_NATIVE_WINDOW,
 311                       "xcb_dri2_create_drawable_checked");
 312          else
 313             _eglError(EGL_BAD_NATIVE_PIXMAP,
 314                       "xcb_dri2_create_drawable_checked");
 315          free(error);
 316          goto cleanup_dri_drawable;
 317       }
 318    } else {
 319       if (type == EGL_PBUFFER_BIT) {
 320          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 321       }
 322       swrastCreateDrawable(dri2_dpy, dri2_surf);
 323    }
 324
 325    /* we always copy the back buffer to front */
 326    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 327
 328    return &dri2_surf->base;
 329
 330  cleanup_dri_drawable:
 331    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 332  cleanup_pixmap:
 333    if (type == EGL_PBUFFER_BIT)
 334       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 335  cleanup_surf:
 336    free(dri2_surf);
 337
 338    return NULL;
 339 }
 340
 341 /**
 342  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 343  */
 344 static _EGLSurface *
 345 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 346                                _EGLConfig *conf, void *native_window,
 347                                const EGLint *attrib_list)
 348 {
 349    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 350    _EGLSurface *surf;
 351
 352    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 353                                   native_window, attrib_list);
 354    if (surf != NULL) {
 355       /* When we first create the DRI2 drawable, its swap interval on the
 356        * server side is 1.
 357        */
 358       surf->SwapInterval = 1;
 359
 360       /* Override that with a driconf-set value. */
 361       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 362    }
 363
 364    return surf;
 365 }
 366
 367 static _EGLSurface *
 368 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 369                                _EGLConfig *conf, void *native_pixmap,
 370                                const EGLint *attrib_list)
 371 {
 372    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 373                                   native_pixmap, attrib_list);
 374 }
 375
 376 static _EGLSurface *
 377 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 378                                 _EGLConfig *conf, const EGLint *attrib_list)
 379 {
 380    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 381                                   NULL, attrib_list);
 382 }
 383
 384 static EGLBoolean
 385 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 386 {
 387    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 388    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 389
 390    (void) drv;
 391
 392    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 393
 394    if (dri2_dpy->dri2) {
 395       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 396    } else {
 397       assert(dri2_dpy->swrast);
 398       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 399    }
 400
 401    if (surf->Type == EGL_PBUFFER_BIT)
 402       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 403
 404    dri2_fini_surface(surf);
 405    free(surf);
 406
 407    return EGL_TRUE;
 408 }
 409
 410 /**
 411  * Function utilizes swrastGetDrawableInfo to get surface
 412  * geometry from x server and calls default query surface
 413  * implementation that returns the updated values.
 414  *
 415  * In case of errors we still return values that we currently
 416  * have.
 417  */
 418 static EGLBoolean
 419 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 420                    _EGLSurface *surf, EGLint attribute,
 421                    EGLint *value)
 422 {
 423    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 424    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 425    int x, y, w, h;
 426
 427    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 428
 429    switch (attribute) {
 430    case EGL_WIDTH:
 431    case EGL_HEIGHT:
 432       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 433          surf->Width = w;
 434          surf->Height = h;
 435       }
 436       break;
 437    default:
 438       break;
 439    }
 440    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 441 }
 442
 443 /**
 444  * Process list of buffer received from the server
 445  *
 446  * Processes the list of buffers received in a reply from the server to either
 447  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 448  */
 449 static void
 450 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 451                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 452 {
 453    struct dri2_egl_display *dri2_dpy =
 454       dri2_egl_display(dri2_surf->base.Resource.Display);
 455    xcb_rectangle_t rectangle;
 456
 457    dri2_surf->have_fake_front = false;
 458
 459    /* This assumes the DRI2 buffer attachment tokens matches the
 460     * __DRIbuffer tokens. */
 461    for (unsigned i = 0; i < count; i++) {
 462       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 463       dri2_surf->buffers[i].name = buffers[i].name;
 464       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 465       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 466       dri2_surf->buffers[i].flags = buffers[i].flags;
 467
 468       /* We only use the DRI drivers single buffer configs.  This
 469        * means that if we try to render to a window, DRI2 will give us
 470        * the fake front buffer, which we'll use as a back buffer.
 471        * Note that EGL doesn't require that several clients rendering
 472        * to the same window must see the same aux buffers. */
 473       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 474          dri2_surf->have_fake_front = true;
 475    }
 476
 477    if (dri2_surf->region != XCB_NONE)
 478       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 479
 480    rectangle.x = 0;
 481    rectangle.y = 0;
 482    rectangle.width = dri2_surf->base.Width;
 483    rectangle.height = dri2_surf->base.Height;
 484    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 485    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 486 }
 487
 488 static __DRIbuffer *
 489 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 490                      int *width, int *height,
 491                      unsigned int *attachments, int count,
 492                      int *out_count, void *loaderPrivate)
 493 {
 494    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 495    struct dri2_egl_display *dri2_dpy =
 496       dri2_egl_display(dri2_surf->base.Resource.Display);
 497    xcb_dri2_dri2_buffer_t *buffers;
 498    xcb_dri2_get_buffers_reply_t *reply;
 499    xcb_dri2_get_buffers_cookie_t cookie;
 500
 501    (void) driDrawable;
 502
 503    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 504                                             dri2_surf->drawable,
 505                                             count, count, attachments);
 506    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 507    if (reply == NULL)
 508       return NULL;
 509    buffers = xcb_dri2_get_buffers_buffers (reply);
 510    if (buffers == NULL)
 511       return NULL;
 512
 513    *out_count = reply->count;
 514    dri2_surf->base.Width = *width = reply->width;
 515    dri2_surf->base.Height = *height = reply->height;
 516    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 517
 518    free(reply);
 519
 520    return dri2_surf->buffers;
 521 }
 522
 523 static __DRIbuffer *
 524 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 525                                  int *width, int *height,
 526                                  unsigned int *attachments, int count,
 527                                  int *out_count, void *loaderPrivate)
 528 {
 529    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 530    struct dri2_egl_display *dri2_dpy =
 531       dri2_egl_display(dri2_surf->base.Resource.Display);
 532    xcb_dri2_dri2_buffer_t *buffers;
 533    xcb_dri2_get_buffers_with_format_reply_t *reply;
 534    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 535    xcb_dri2_attach_format_t *format_attachments;
 536
 537    (void) driDrawable;
 538
 539    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 540    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 541                                                         dri2_surf->drawable,
 542                                                         count, count,
 543                                                         format_attachments);
 544
 545    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 546                                                    cookie, NULL);
 547    if (reply == NULL)
 548       return NULL;
 549
 550    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 551    dri2_surf->base.Width = *width = reply->width;
 552    dri2_surf->base.Height = *height = reply->height;
 553    *out_count = reply->count;
 554    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 555
 556    free(reply);
 557
 558    return dri2_surf->buffers;
 559 }
 560
 561 static void
 562 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 563 {
 564    (void) driDrawable;
 565
 566    /* FIXME: Does EGL support front buffer rendering at all? */
 567
 568 #if 0
 569    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 570
 571    dri2WaitGL(dri2_surf);
 572 #else
 573    (void) loaderPrivate;
 574 #endif
 575 }
 576
 577 static int
 578 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 579 {
 580    xcb_dri2_authenticate_reply_t *authenticate;
 581    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 582    int ret = 0;
 583
 584    authenticate_cookie =
 585       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 586    authenticate =
 587       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 588
 589    if (authenticate == NULL || !authenticate->authenticated)
 590       ret = -1;
 591
 592    free(authenticate);
 593
 594    return ret;
 595 }
 596
 597 static EGLBoolean
 598 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 599 {
 600 #ifdef HAVE_LIBDRM
 601    drm_magic_t magic;
 602
 603    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 604       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 605       return EGL_FALSE;
 606    }
 607
 608    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 609       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 610       return EGL_FALSE;
 611    }
 612 #endif
 613    return EGL_TRUE;
 614 }
 615
 616 static EGLBoolean
 617 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 618 {
 619    xcb_xfixes_query_version_reply_t *xfixes_query;
 620    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 621    xcb_dri2_query_version_reply_t *dri2_query;
 622    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 623    xcb_dri2_connect_reply_t *connect;
 624    xcb_dri2_connect_cookie_t connect_cookie;
 625    xcb_generic_error_t *error;
 626    char *driver_name, *loader_driver_name, *device_name;
 627    const xcb_query_extension_reply_t *extension;
 628
 629    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 630    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 631
 632    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 633    if (!(extension && extension->present))
 634       return EGL_FALSE;
 635
 636    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 637    if (!(extension && extension->present))
 638       return EGL_FALSE;
 639
 640    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 641                                                   XCB_XFIXES_MAJOR_VERSION,
 642                                                   XCB_XFIXES_MINOR_VERSION);
 643
 644    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 645                                                XCB_DRI2_MAJOR_VERSION,
 646                                                XCB_DRI2_MINOR_VERSION);
 647
 648    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 649                                    XCB_DRI2_DRIVER_TYPE_DRI);
 650
 651    xfixes_query =
 652       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 653                                       xfixes_query_cookie, &error);
 654    if (xfixes_query == NULL ||
 655        error != NULL || xfixes_query->major_version < 2) {
 656       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 657       free(error);
 658       free(xfixes_query);
 659       return EGL_FALSE;
 660    }
 661    free(xfixes_query);
 662
 663    dri2_query =
 664       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 665    if (dri2_query == NULL || error != NULL) {
 666       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 667       free(error);
 668       return EGL_FALSE;
 669    }
 670    dri2_dpy->dri2_major = dri2_query->major_version;
 671    dri2_dpy->dri2_minor = dri2_query->minor_version;
 672    free(dri2_query);
 673
 674    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 675    if (connect == NULL ||
 676        connect->driver_name_length + connect->device_name_length == 0) {
 677       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 678       return EGL_FALSE;
 679    }
 680
 681    device_name = xcb_dri2_connect_device_name (connect);
 682
 683    dri2_dpy->fd = loader_open_device(device_name);
 684    if (dri2_dpy->fd == -1) {
 685       _eglLog(_EGL_WARNING,
 686               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 687       free(connect);
 688       return EGL_FALSE;
 689    }
 690
 691    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 692       close(dri2_dpy->fd);
 693       free(connect);
 694       return EGL_FALSE;
 695    }
 696
 697    driver_name = xcb_dri2_connect_driver_name (connect);
 698
 699    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 700     * Otherwise, default to the server's value.
 701     */
 702    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 703    if (loader_driver_name) {
 704       dri2_dpy->driver_name = loader_driver_name;
 705    } else {
 706       dri2_dpy->driver_name =
 707          strndup(driver_name,
 708                  xcb_dri2_connect_driver_name_length(connect));
 709    }
 710
 711    if (dri2_dpy->driver_name == NULL) {
 712       close(dri2_dpy->fd);
 713       free(connect);
 714       return EGL_FALSE;
 715    }
 716
 717 #ifdef HAVE_WAYLAND_PLATFORM
 718    dri2_dpy->device_name =
 719       strndup(device_name,
 720               xcb_dri2_connect_device_name_length(connect));
 721 #endif
 722
 723    free(connect);
 724
 725    return EGL_TRUE;
 726 }
 727
 728 static int
 729 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 730 {
 731    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 732
 733    return dri2_x11_do_authenticate(dri2_dpy, id);
 734 }
 735
 736 static EGLBoolean
 737 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 738                                  _EGLDisplay *disp, bool supports_preserved)
 739 {
 740    xcb_depth_iterator_t d;
 741    xcb_visualtype_t *visuals;
 742    int config_count = 0;
 743    EGLint surface_type;
 744
 745    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 746
 747    surface_type =
 748       EGL_WINDOW_BIT |
 749       EGL_PIXMAP_BIT |
 750       EGL_PBUFFER_BIT;
 751
 752    if (supports_preserved)
 753       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 754
 755    while (d.rem > 0) {
 756       EGLBoolean class_added[6] = { 0, };
 757
 758       visuals = xcb_depth_visuals(d.data);
 759
 760       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 761          if (class_added[visuals[i]._class])
 762             continue;
 763
 764          class_added[visuals[i]._class] = EGL_TRUE;
 765
 766          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 767             struct dri2_egl_config *dri2_conf;
 768             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 769
 770             const EGLint config_attrs[] = {
 771                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 772                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 773                     EGL_NONE
 774             };
 775
 776             unsigned int rgba_masks[4] = {
 777                visuals[i].red_mask,
 778                visuals[i].green_mask,
 779                visuals[i].blue_mask,
 780                0,
 781             };
 782
 783             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 784                                         surface_type, config_attrs,
 785                                         rgba_masks);
 786             if (dri2_conf)
 787                if (dri2_conf->base.ConfigID == config_count + 1)
 788                   config_count++;
 789
 790             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 791              * Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
 792              * Otherwise it will only match a 32-bit RGBA visual.  On a
 793              * composited window manager on X11, this will make all of the
 794              * EGLConfigs with destination alpha get blended by the
 795              * compositor.  This is probably not what the application
 796              * wants... especially on drivers that only have 32-bit RGBA
 797              * EGLConfigs! */
 798             if (d.data->depth == 24 || d.data->depth == 30) {
 799                rgba_masks[3] =
 800                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 801                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 802                                            surface_type, config_attrs,
 803                                            rgba_masks);
 804                if (dri2_conf)
 805                   if (dri2_conf->base.ConfigID == config_count + 1)
 806                      config_count++;
 807             }
 808          }
 809       }
 810
 811       xcb_depth_next(&d);
 812    }
 813
 814    if (!config_count) {
 815       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 816       return EGL_FALSE;
 817    }
 818
 819    return EGL_TRUE;
 820 }
 821
 822 static EGLBoolean
 823 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 824                  _EGLSurface *draw, xcb_xfixes_region_t region)
 825 {
 826    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 827    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 828    enum xcb_dri2_attachment_t render_attachment;
 829    xcb_dri2_copy_region_cookie_t cookie;
 830
 831    /* No-op for a pixmap or pbuffer surface */
 832    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 833       return EGL_TRUE;
 834
 835    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 836
 837    if (dri2_surf->have_fake_front)
 838       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 839    else
 840       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 841
 842    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 843                                            dri2_surf->drawable,
 844                                            region,
 845                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 846                                            render_attachment);
 847    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 848
 849    return EGL_TRUE;
 850 }
 851
 852 static int64_t
 853 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 854                           int64_t msc, int64_t divisor, int64_t remainder)
 855 {
 856    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 857    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 858    uint32_t msc_hi = msc >> 32;
 859    uint32_t msc_lo = msc & 0xffffffff;
 860    uint32_t divisor_hi = divisor >> 32;
 861    uint32_t divisor_lo = divisor & 0xffffffff;
 862    uint32_t remainder_hi = remainder >> 32;
 863    uint32_t remainder_lo = remainder & 0xffffffff;
 864    xcb_dri2_swap_buffers_cookie_t cookie;
 865    xcb_dri2_swap_buffers_reply_t *reply;
 866    int64_t swap_count = -1;
 867
 868    /* No-op for a pixmap or pbuffer surface */
 869    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 870       return 0;
 871
 872    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available) {
 873       swap_count = dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 874    } else {
 875       dri2_flush_drawable_for_swapbuffers(disp, draw);
 876
 877       cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn,
 878                                                dri2_surf->drawable, msc_hi,
 879                                                msc_lo, divisor_hi, divisor_lo,
 880                                                remainder_hi, remainder_lo);
 881
 882       reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 883
 884       if (reply) {
 885          swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 886          free(reply);
 887       }
 888    }
 889
 890    /* Since we aren't watching for the server's invalidate events like we're
 891     * supposed to (due to XCB providing no mechanism for filtering the events
 892     * the way xlib does), and SwapBuffers is a common cause of invalidate
 893     * events, just shove one down to the driver, even though we haven't told
 894     * the driver that we're the kind of loader that provides reliable
 895     * invalidate events.  This causes the driver to request buffers again at
 896     * its next draw, so that we get the correct buffers if a pageflip
 897     * happened.  The driver should still be using the viewport hack to catch
 898     * window resizes.
 899     */
 900    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 901       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 902
 903    return swap_count;
 904 }
 905
 906 static EGLBoolean
 907 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 908 {
 909    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 910    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 911
 912    if (!dri2_dpy->flush) {
 913       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 914       return EGL_TRUE;
 915    }
 916
 917    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 918       /* Swap failed with a window drawable. */
 919       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 920    }
 921    return EGL_TRUE;
 922 }
 923
 924 static EGLBoolean
 925 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 926                              _EGLSurface *draw,
 927                              EGLint numRects, const EGLint *rects)
 928 {
 929    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 930    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 931    EGLBoolean ret;
 932    xcb_xfixes_region_t region;
 933    xcb_rectangle_t rectangles[16];
 934
 935    if (numRects > (int)ARRAY_SIZE(rectangles))
 936       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 937
 938    for (int i = 0; i < numRects; i++) {
 939       rectangles[i].x = rects[i * 4];
 940       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 941       rectangles[i].width = rects[i * 4 + 2];
 942       rectangles[i].height = rects[i * 4 + 3];
 943    }
 944
 945    region = xcb_generate_id(dri2_dpy->conn);
 946    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 947    ret = dri2_copy_region(drv, disp, draw, region);
 948    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 949
 950    return ret;
 951 }
 952
 953 static EGLBoolean
 954 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 955                      EGLint x, EGLint y, EGLint width, EGLint height)
 956 {
 957    const EGLint rect[4] = { x, y, width, height };
 958
 959    if (x < 0 || y < 0 || width < 0 || height < 0)
 960       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 961
 962    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 963 }
 964
 965 static EGLBoolean
 966 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 967                        EGLint interval)
 968 {
 969    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 970    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 971
 972    if (dri2_dpy->swap_available)
 973       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 974
 975    return EGL_TRUE;
 976 }
 977
 978 static EGLBoolean
 979 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 980                       void *native_pixmap_target)
 981 {
 982    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 983    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 984    xcb_gcontext_t gc;
 985    xcb_pixmap_t target;
 986
 987    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 988    target = (uintptr_t) native_pixmap_target;
 989
 990    (void) drv;
 991
 992    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 993
 994    gc = xcb_generate_id(dri2_dpy->conn);
 995    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 996    xcb_copy_area(dri2_dpy->conn,
 997                   dri2_surf->drawable,
 998                   target,
 999                   gc,
1000                   0, 0,
1001                   0, 0,
1002                   dri2_surf->base.Width,
1003                   dri2_surf->base.Height);
1004    xcb_free_gc(dri2_dpy->conn, gc);
1005
1006    return EGL_TRUE;
1007 }
1008
1009 static _EGLImage *
1010 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1011                              EGLClientBuffer buffer, const EGLint *attr_list)
1012 {
1013    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1014    struct dri2_egl_image *dri2_img;
1015    unsigned int attachments[1];
1016    xcb_drawable_t drawable;
1017    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1018    xcb_dri2_get_buffers_reply_t *buffers_reply;
1019    xcb_dri2_dri2_buffer_t *buffers;
1020    xcb_get_geometry_cookie_t geometry_cookie;
1021    xcb_get_geometry_reply_t *geometry_reply;
1022    xcb_generic_error_t *error;
1023    int stride, format;
1024
1025    (void) ctx;
1026
1027    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1028    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1029    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1030    buffers_cookie =
1031       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1032                                       drawable, 1, 1, attachments);
1033    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1034    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1035                                                buffers_cookie, NULL);
1036    if (buffers_reply == NULL)
1037      return NULL;
1038
1039    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1040    if (buffers == NULL) {
1041       return NULL;
1042    }
1043
1044    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1045                                             geometry_cookie, &error);
1046    if (geometry_reply == NULL || error != NULL) {
1047       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1048       free(error);
1049       free(buffers_reply);
1050       return NULL;
1051    }
1052
1053    switch (geometry_reply->depth) {
1054    case 16:
1055       format = __DRI_IMAGE_FORMAT_RGB565;
1056       break;
1057    case 24:
1058       format = __DRI_IMAGE_FORMAT_XRGB8888;
1059       break;
1060    case 30:
1061       format = __DRI_IMAGE_FORMAT_XRGB2101010;
1062       break;
1063    case 32:
1064       format = __DRI_IMAGE_FORMAT_ARGB8888;
1065       break;
1066    default:
1067       _eglError(EGL_BAD_PARAMETER,
1068                 "dri2_create_image_khr: unsupported pixmap depth");
1069       free(buffers_reply);
1070       free(geometry_reply);
1071       return NULL;
1072    }
1073
1074    dri2_img = malloc(sizeof *dri2_img);
1075    if (!dri2_img) {
1076       free(buffers_reply);
1077       free(geometry_reply);
1078       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1079       return EGL_NO_IMAGE_KHR;
1080    }
1081
1082    _eglInitImage(&dri2_img->base, disp);
1083
1084    stride = buffers[0].pitch / buffers[0].cpp;
1085    dri2_img->dri_image =
1086       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1087                                            buffers_reply->width,
1088                                            buffers_reply->height,
1089                                            format,
1090                                            buffers[0].name,
1091                                            stride,
1092                                            dri2_img);
1093
1094    free(buffers_reply);
1095    free(geometry_reply);
1096
1097    return &dri2_img->base;
1098 }
1099
1100 static _EGLImage *
1101 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1102                           _EGLContext *ctx, EGLenum target,
1103                           EGLClientBuffer buffer, const EGLint *attr_list)
1104 {
1105    (void) drv;
1106
1107    switch (target) {
1108    case EGL_NATIVE_PIXMAP_KHR:
1109       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1110    default:
1111       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1112    }
1113 }
1114
1115 static EGLBoolean
1116 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1117                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1118                          EGLuint64KHR *sbc)
1119 {
1120    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1121    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1122    xcb_dri2_get_msc_cookie_t cookie;
1123    xcb_dri2_get_msc_reply_t *reply;
1124
1125    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1126    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1127
1128    if (!reply)
1129       return _eglError(EGL_BAD_ACCESS, __func__);
1130
1131    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1132    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1133    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1134    free(reply);
1135
1136    return EGL_TRUE;
1137 }
1138
1139 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1140    .authenticate = NULL,
1141    .create_window_surface = dri2_x11_create_window_surface,
1142    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1143    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1144    .destroy_surface = dri2_x11_destroy_surface,
1145    .create_image = dri2_create_image_khr,
1146    .swap_buffers = dri2_x11_swap_buffers,
1147    .set_damage_region = dri2_fallback_set_damage_region,
1148    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1149    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1150    .copy_buffers = dri2_x11_copy_buffers,
1151    .query_buffer_age = dri2_fallback_query_buffer_age,
1152    .query_surface = dri2_query_surface,
1153    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1154    .get_sync_values = dri2_fallback_get_sync_values,
1155    .get_dri_drawable = dri2_surface_get_dri_drawable,
1156 };
1157
1158 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1159    .authenticate = dri2_x11_authenticate,
1160    .create_window_surface = dri2_x11_create_window_surface,
1161    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1162    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1163    .destroy_surface = dri2_x11_destroy_surface,
1164    .create_image = dri2_x11_create_image_khr,
1165    .swap_interval = dri2_x11_swap_interval,
1166    .swap_buffers = dri2_x11_swap_buffers,
1167    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1168    .swap_buffers_region = dri2_x11_swap_buffers_region,
1169    .set_damage_region = dri2_fallback_set_damage_region,
1170    .post_sub_buffer = dri2_x11_post_sub_buffer,
1171    .copy_buffers = dri2_x11_copy_buffers,
1172    .query_buffer_age = dri2_fallback_query_buffer_age,
1173    .query_surface = dri2_query_surface,
1174    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1175    .get_sync_values = dri2_x11_get_sync_values,
1176    .get_dri_drawable = dri2_surface_get_dri_drawable,
1177 };
1178
1179 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1180    .base = { __DRI_SWRAST_LOADER, 1 },
1181
1182    .getDrawableInfo = swrastGetDrawableInfo,
1183    .putImage        = swrastPutImage,
1184    .getImage        = swrastGetImage,
1185 };
1186
1187 static const __DRIextension *swrast_loader_extensions[] = {
1188    &swrast_loader_extension.base,
1189    &image_lookup_extension.base,
1190    NULL,
1191 };
1192
1193 static EGLBoolean
1194 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1195                         struct dri2_egl_display *dri2_dpy)
1196 {
1197    xcb_screen_iterator_t s;
1198    int screen = (uintptr_t)disp->Options.Platform;
1199    const char *msg;
1200
1201    disp->DriverData = (void *) dri2_dpy;
1202    if (disp->PlatformDisplay == NULL) {
1203       dri2_dpy->conn = xcb_connect(NULL, &screen);
1204       dri2_dpy->own_device = true;
1205    } else {
1206       Display *dpy = disp->PlatformDisplay;
1207
1208       dri2_dpy->conn = XGetXCBConnection(dpy);
1209       screen = DefaultScreen(dpy);
1210    }
1211
1212    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1213       msg = "xcb_connect failed";
1214       goto disconnect;
1215    }
1216
1217    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1218    dri2_dpy->screen = get_xcb_screen(s, screen);
1219    if (!dri2_dpy->screen) {
1220       msg = "failed to get xcb screen";
1221       goto disconnect;
1222    }
1223
1224    return EGL_TRUE;
1225 disconnect:
1226    if (disp->PlatformDisplay == NULL)
1227       xcb_disconnect(dri2_dpy->conn);
1228
1229    return _eglError(EGL_BAD_ALLOC, msg);
1230 }
1231
1232 static EGLBoolean
1233 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1234 {
1235    struct dri2_egl_display *dri2_dpy;
1236
1237    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1238    if (!dri2_dpy)
1239       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1240
1241    dri2_dpy->fd = -1;
1242    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1243       goto cleanup;
1244
1245    /*
1246     * Every hardware driver_name is set using strdup. Doing the same in
1247     * here will allow is to simply free the memory at dri2_terminate().
1248     */
1249    dri2_dpy->driver_name = strdup("swrast");
1250    if (!dri2_load_driver_swrast(disp))
1251       goto cleanup;
1252
1253    dri2_dpy->loader_extensions = swrast_loader_extensions;
1254
1255    if (!dri2_create_screen(disp))
1256       goto cleanup;
1257
1258    if (!dri2_setup_extensions(disp))
1259       goto cleanup;
1260
1261    dri2_setup_screen(disp);
1262
1263    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1264       goto cleanup;
1265
1266    /* Fill vtbl last to prevent accidentally calling virtual function during
1267     * initialization.
1268     */
1269    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1270
1271    return EGL_TRUE;
1272
1273  cleanup:
1274    dri2_display_destroy(disp);
1275    return EGL_FALSE;
1276 }
1277
1278 static void
1279 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1280 {
1281    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1282    int arbitrary_max_interval = 1000;
1283
1284    /* default behavior for no SwapBuffers support: no vblank syncing
1285     * either.
1286     */
1287    dri2_dpy->min_swap_interval = 0;
1288    dri2_dpy->max_swap_interval = 0;
1289    dri2_dpy->default_swap_interval = 0;
1290
1291    if (!dri2_dpy->swap_available)
1292       return;
1293
1294    /* If we do have swapbuffers, then we can support pretty much any swap
1295     * interval.
1296     */
1297    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1298 }
1299
1300 #ifdef HAVE_DRI3
1301
1302 static const __DRIextension *dri3_image_loader_extensions[] = {
1303    &dri3_image_loader_extension.base,
1304    &image_lookup_extension.base,
1305    &use_invalidate.base,
1306    &background_callable_extension.base,
1307    NULL,
1308 };
1309
1310 static EGLBoolean
1311 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1312 {
1313    struct dri2_egl_display *dri2_dpy;
1314
1315    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1316    if (!dri2_dpy)
1317       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1318
1319    dri2_dpy->fd = -1;
1320    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1321       goto cleanup;
1322
1323    if (!dri3_x11_connect(dri2_dpy))
1324       goto cleanup;
1325
1326    if (!dri2_load_driver_dri3(disp))
1327       goto cleanup;
1328
1329    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1330
1331    dri2_dpy->swap_available = true;
1332    dri2_dpy->invalidate_available = true;
1333
1334    if (!dri2_create_screen(disp))
1335       goto cleanup;
1336
1337    if (!dri2_setup_extensions(disp))
1338       goto cleanup;
1339
1340    dri2_setup_screen(disp);
1341
1342    dri2_x11_setup_swap_interval(disp);
1343
1344    if (!dri2_dpy->is_different_gpu)
1345       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1346    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1347    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1348    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1349
1350    dri2_set_WL_bind_wayland_display(drv, disp);
1351
1352    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1353       goto cleanup;
1354
1355    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1356    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1357    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1358    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1359    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1360    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1361
1362    /* Fill vtbl last to prevent accidentally calling virtual function during
1363     * initialization.
1364     */
1365    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1366
1367    _eglLog(_EGL_INFO, "Using DRI3");
1368
1369    return EGL_TRUE;
1370
1371  cleanup:
1372    dri2_display_destroy(disp);
1373    return EGL_FALSE;
1374 }
1375 #endif
1376
1377 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1378    .base = { __DRI_DRI2_LOADER, 2 },
1379
1380    .getBuffers           = dri2_x11_get_buffers,
1381    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1382    .getBuffersWithFormat = NULL,
1383 };
1384
1385 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1386    .base = { __DRI_DRI2_LOADER, 3 },
1387
1388    .getBuffers           = dri2_x11_get_buffers,
1389    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1390    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1391 };
1392
1393 static const __DRIextension *dri2_loader_extensions_old[] = {
1394    &dri2_loader_extension_old.base,
1395    &image_lookup_extension.base,
1396    &background_callable_extension.base,
1397    NULL,
1398 };
1399
1400 static const __DRIextension *dri2_loader_extensions[] = {
1401    &dri2_loader_extension.base,
1402    &image_lookup_extension.base,
1403    &use_invalidate.base,
1404    &background_callable_extension.base,
1405    NULL,
1406 };
1407
1408 static EGLBoolean
1409 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1410 {
1411    struct dri2_egl_display *dri2_dpy;
1412
1413    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1414    if (!dri2_dpy)
1415       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1416
1417    dri2_dpy->fd = -1;
1418    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1419       goto cleanup;
1420
1421    if (!dri2_x11_connect(dri2_dpy))
1422       goto cleanup;
1423
1424    if (!dri2_load_driver(disp))
1425       goto cleanup;
1426
1427    if (dri2_dpy->dri2_minor >= 1)
1428       dri2_dpy->loader_extensions = dri2_loader_extensions;
1429    else
1430       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1431
1432    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1433    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1434
1435    if (!dri2_create_screen(disp))
1436       goto cleanup;
1437
1438    if (!dri2_setup_extensions(disp))
1439       goto cleanup;
1440
1441    dri2_setup_screen(disp);
1442
1443    dri2_x11_setup_swap_interval(disp);
1444
1445    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1446    disp->Extensions.NOK_swap_region = EGL_TRUE;
1447    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1448    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1449    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1450
1451    dri2_set_WL_bind_wayland_display(drv, disp);
1452
1453    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1454       goto cleanup;
1455
1456    /* Fill vtbl last to prevent accidentally calling virtual function during
1457     * initialization.
1458     */
1459    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1460
1461    _eglLog(_EGL_INFO, "Using DRI2");
1462
1463    return EGL_TRUE;
1464
1465  cleanup:
1466    dri2_display_destroy(disp);
1467    return EGL_FALSE;
1468 }
1469
1470 EGLBoolean
1471 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1472 {
1473    EGLBoolean initialized = EGL_FALSE;
1474
1475    if (!disp->Options.ForceSoftware) {
1476 #ifdef HAVE_DRI3
1477       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1478          initialized = dri2_initialize_x11_dri3(drv, disp);
1479 #endif
1480
1481       if (!initialized)
1482          initialized = dri2_initialize_x11_dri2(drv, disp);
1483    }
1484
1485    if (!initialized)
1486       initialized = dri2_initialize_x11_swrast(drv, disp);
1487
1488    return initialized;
1489 }
1490
1491 void
1492 dri2_teardown_x11(struct dri2_egl_display *dri2_dpy)
1493 {
1494    if (dri2_dpy->own_device)
1495       xcb_disconnect(dri2_dpy->conn);
1496 }