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       if (!drawable) {
 239          _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 240          goto cleanup_surf;
 241       }
 242       dri2_surf->drawable = drawable;
 243    }
 244
 245    if (dri2_dpy->dri2) {
 246       const __DRIconfig *config =
 247          dri2_get_dri_config(dri2_conf, type, dri2_surf->base.GLColorspace);
 248
 249       dri2_surf->dri_drawable =
 250          (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 251                                               dri2_surf);
 252    } else {
 253       assert(dri2_dpy->swrast);
 254       dri2_surf->dri_drawable =
 255          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 256                                                  dri2_conf->dri_double_config,
 257                                                  dri2_surf);
 258    }
 259
 260    if (dri2_surf->dri_drawable == NULL) {
 261       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 262       goto cleanup_pixmap;
 263    }
 264
 265    if (type != EGL_PBUFFER_BIT) {
 266       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 267       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 268       if (reply == NULL || error != NULL) {
 269          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 270          free(error);
 271          goto cleanup_dri_drawable;
 272       }
 273
 274       dri2_surf->base.Width = reply->width;
 275       dri2_surf->base.Height = reply->height;
 276       dri2_surf->depth = reply->depth;
 277       free(reply);
 278    }
 279
 280    if (dri2_dpy->dri2) {
 281       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 282    } else {
 283       if (type == EGL_PBUFFER_BIT) {
 284          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 285       }
 286       swrastCreateDrawable(dri2_dpy, dri2_surf);
 287    }
 288
 289    /* we always copy the back buffer to front */
 290    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 291
 292    return &dri2_surf->base;
 293
 294  cleanup_dri_drawable:
 295    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 296  cleanup_pixmap:
 297    if (type == EGL_PBUFFER_BIT)
 298       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 299  cleanup_surf:
 300    free(dri2_surf);
 301
 302    return NULL;
 303 }
 304
 305 /**
 306  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 307  */
 308 static _EGLSurface *
 309 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 310                                _EGLConfig *conf, void *native_window,
 311                                const EGLint *attrib_list)
 312 {
 313    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 314    _EGLSurface *surf;
 315
 316    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 317                                   native_window, attrib_list);
 318    if (surf != NULL) {
 319       /* When we first create the DRI2 drawable, its swap interval on the
 320        * server side is 1.
 321        */
 322       surf->SwapInterval = 1;
 323
 324       /* Override that with a driconf-set value. */
 325       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 326    }
 327
 328    return surf;
 329 }
 330
 331 static _EGLSurface *
 332 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 333                                _EGLConfig *conf, void *native_pixmap,
 334                                const EGLint *attrib_list)
 335 {
 336    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 337                                   native_pixmap, attrib_list);
 338 }
 339
 340 static _EGLSurface *
 341 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 342                                 _EGLConfig *conf, const EGLint *attrib_list)
 343 {
 344    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 345                                   XCB_WINDOW_NONE, attrib_list);
 346 }
 347
 348 static EGLBoolean
 349 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 350 {
 351    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 352    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 353
 354    (void) drv;
 355
 356    if (!_eglPutSurface(surf))
 357       return EGL_TRUE;
 358
 359    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 360
 361    if (dri2_dpy->dri2) {
 362       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 363    } else {
 364       assert(dri2_dpy->swrast);
 365       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 366    }
 367
 368    if (surf->Type == EGL_PBUFFER_BIT)
 369       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 370
 371    free(surf);
 372
 373    return EGL_TRUE;
 374 }
 375
 376 /**
 377  * Process list of buffer received from the server
 378  *
 379  * Processes the list of buffers received in a reply from the server to either
 380  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 381  */
 382 static void
 383 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 384                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 385 {
 386    struct dri2_egl_display *dri2_dpy =
 387       dri2_egl_display(dri2_surf->base.Resource.Display);
 388    xcb_rectangle_t rectangle;
 389    unsigned i;
 390
 391    dri2_surf->buffer_count = count;
 392    dri2_surf->have_fake_front = 0;
 393
 394    /* This assumes the DRI2 buffer attachment tokens matches the
 395     * __DRIbuffer tokens. */
 396    for (i = 0; i < count; i++) {
 397       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 398       dri2_surf->buffers[i].name = buffers[i].name;
 399       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 400       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 401       dri2_surf->buffers[i].flags = buffers[i].flags;
 402
 403       /* We only use the DRI drivers single buffer configs.  This
 404        * means that if we try to render to a window, DRI2 will give us
 405        * the fake front buffer, which we'll use as a back buffer.
 406        * Note that EGL doesn't require that several clients rendering
 407        * to the same window must see the same aux buffers. */
 408       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 409          dri2_surf->have_fake_front = 1;
 410    }
 411
 412    if (dri2_surf->region != XCB_NONE)
 413       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 414
 415    rectangle.x = 0;
 416    rectangle.y = 0;
 417    rectangle.width = dri2_surf->base.Width;
 418    rectangle.height = dri2_surf->base.Height;
 419    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 420    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 421 }
 422
 423 static __DRIbuffer *
 424 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 425                      int *width, int *height,
 426                      unsigned int *attachments, int count,
 427                      int *out_count, void *loaderPrivate)
 428 {
 429    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 430    struct dri2_egl_display *dri2_dpy =
 431       dri2_egl_display(dri2_surf->base.Resource.Display);
 432    xcb_dri2_dri2_buffer_t *buffers;
 433    xcb_dri2_get_buffers_reply_t *reply;
 434    xcb_dri2_get_buffers_cookie_t cookie;
 435
 436    (void) driDrawable;
 437
 438    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 439                                             dri2_surf->drawable,
 440                                             count, count, attachments);
 441    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 442    buffers = xcb_dri2_get_buffers_buffers (reply);
 443    if (buffers == NULL)
 444       return NULL;
 445
 446    *out_count = reply->count;
 447    dri2_surf->base.Width = *width = reply->width;
 448    dri2_surf->base.Height = *height = reply->height;
 449    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 450
 451    free(reply);
 452
 453    return dri2_surf->buffers;
 454 }
 455
 456 static __DRIbuffer *
 457 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 458                                  int *width, int *height,
 459                                  unsigned int *attachments, int count,
 460                                  int *out_count, void *loaderPrivate)
 461 {
 462    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 463    struct dri2_egl_display *dri2_dpy =
 464       dri2_egl_display(dri2_surf->base.Resource.Display);
 465    xcb_dri2_dri2_buffer_t *buffers;
 466    xcb_dri2_get_buffers_with_format_reply_t *reply;
 467    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 468    xcb_dri2_attach_format_t *format_attachments;
 469
 470    (void) driDrawable;
 471
 472    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 473    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 474                                                         dri2_surf->drawable,
 475                                                         count, count,
 476                                                         format_attachments);
 477
 478    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 479                                                    cookie, NULL);
 480    if (reply == NULL)
 481       return NULL;
 482
 483    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 484    dri2_surf->base.Width = *width = reply->width;
 485    dri2_surf->base.Height = *height = reply->height;
 486    *out_count = reply->count;
 487    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 488
 489    free(reply);
 490
 491    return dri2_surf->buffers;
 492 }
 493
 494 static void
 495 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 496 {
 497    (void) driDrawable;
 498
 499    /* FIXME: Does EGL support front buffer rendering at all? */
 500
 501 #if 0
 502    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 503
 504    dri2WaitGL(dri2_surf);
 505 #else
 506    (void) loaderPrivate;
 507 #endif
 508 }
 509
 510 static EGLBoolean
 511 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 512 {
 513    xcb_xfixes_query_version_reply_t *xfixes_query;
 514    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 515    xcb_dri2_query_version_reply_t *dri2_query;
 516    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 517    xcb_dri2_connect_reply_t *connect;
 518    xcb_dri2_connect_cookie_t connect_cookie;
 519    xcb_generic_error_t *error;
 520    xcb_screen_iterator_t s;
 521    xcb_screen_t *screen;
 522    char *driver_name, *loader_driver_name, *device_name;
 523    const xcb_query_extension_reply_t *extension;
 524
 525    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 526    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 527
 528    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 529    if (!(extension && extension->present))
 530       return EGL_FALSE;
 531
 532    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 533    if (!(extension && extension->present))
 534       return EGL_FALSE;
 535
 536    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 537                                                   XCB_XFIXES_MAJOR_VERSION,
 538                                                   XCB_XFIXES_MINOR_VERSION);
 539
 540    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 541                                                XCB_DRI2_MAJOR_VERSION,
 542                                                XCB_DRI2_MINOR_VERSION);
 543
 544    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 545    screen = get_xcb_screen(s, dri2_dpy->screen);
 546    if (!screen) {
 547       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_connect");
 548       return EGL_FALSE;
 549    }
 550    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 551                                    XCB_DRI2_DRIVER_TYPE_DRI);
 552
 553    xfixes_query =
 554       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 555                                       xfixes_query_cookie, &error);
 556    if (xfixes_query == NULL ||
 557        error != NULL || xfixes_query->major_version < 2) {
 558       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 559       free(error);
 560       return EGL_FALSE;
 561    }
 562    free(xfixes_query);
 563
 564    dri2_query =
 565       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 566    if (dri2_query == NULL || error != NULL) {
 567       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 568       free(error);
 569       return EGL_FALSE;
 570    }
 571    dri2_dpy->dri2_major = dri2_query->major_version;
 572    dri2_dpy->dri2_minor = dri2_query->minor_version;
 573    free(dri2_query);
 574
 575    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 576    if (connect == NULL ||
 577        connect->driver_name_length + connect->device_name_length == 0) {
 578       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 579       return EGL_FALSE;
 580    }
 581
 582    device_name = xcb_dri2_connect_device_name (connect);
 583
 584    dri2_dpy->device_name =
 585       strndup(device_name,
 586               xcb_dri2_connect_device_name_length(connect));
 587
 588    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 589    if (dri2_dpy->fd == -1) {
 590       _eglLog(_EGL_WARNING,
 591               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
 592               strerror(errno));
 593       free(dri2_dpy->device_name);
 594       free(connect);
 595       return EGL_FALSE;
 596    }
 597
 598    driver_name = xcb_dri2_connect_driver_name (connect);
 599
 600    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 601     * Otherwise, default to the server's value.
 602     */
 603    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 604    if (loader_driver_name) {
 605       free(driver_name);
 606       driver_name = loader_driver_name;
 607    }
 608
 609    dri2_dpy->driver_name =
 610       strndup(driver_name,
 611               xcb_dri2_connect_driver_name_length(connect));
 612
 613    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 614       close(dri2_dpy->fd);
 615       free(dri2_dpy->device_name);
 616       free(dri2_dpy->driver_name);
 617       free(connect);
 618       return EGL_FALSE;
 619    }
 620    free(connect);
 621
 622    return EGL_TRUE;
 623 }
 624
 625 static int
 626 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 627 {
 628    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 629    xcb_dri2_authenticate_reply_t *authenticate;
 630    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 631    xcb_screen_iterator_t s;
 632    xcb_screen_t *screen;
 633    int ret = 0;
 634
 635    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 636
 637    screen = get_xcb_screen(s, dri2_dpy->screen);
 638    if (!screen) {
 639       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_authenticate");
 640       return -1;
 641    }
 642
 643    authenticate_cookie =
 644       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 645    authenticate =
 646       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 647
 648    if (authenticate == NULL || !authenticate->authenticated)
 649       ret = -1;
 650
 651    free(authenticate);
 652
 653    return ret;
 654 }
 655
 656 static EGLBoolean
 657 dri2_x11_local_authenticate(_EGLDisplay *disp)
 658 {
 659 #ifdef HAVE_LIBDRM
 660    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 661    drm_magic_t magic;
 662
 663    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 664       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 665       return EGL_FALSE;
 666    }
 667
 668    if (dri2_x11_authenticate(disp, magic) < 0) {
 669       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 670       return EGL_FALSE;
 671    }
 672 #endif
 673    return EGL_TRUE;
 674 }
 675
 676 static EGLBoolean
 677 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 678                                  _EGLDisplay *disp)
 679 {
 680    xcb_screen_iterator_t s;
 681    xcb_depth_iterator_t d;
 682    xcb_visualtype_t *visuals;
 683    int i, j, id;
 684    unsigned int rgba_masks[4];
 685    EGLint surface_type;
 686    EGLint config_attrs[] = {
 687            EGL_NATIVE_VISUAL_ID,   0,
 688            EGL_NATIVE_VISUAL_TYPE, 0,
 689            EGL_NONE
 690    };
 691
 692    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 693    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 694    id = 1;
 695
 696    surface_type =
 697       EGL_WINDOW_BIT |
 698       EGL_PIXMAP_BIT |
 699       EGL_PBUFFER_BIT |
 700       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 701
 702    while (d.rem > 0) {
 703       EGLBoolean class_added[6] = { 0, };
 704
 705       visuals = xcb_depth_visuals(d.data);
 706       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 707          if (class_added[visuals[i]._class])
 708             continue;
 709
 710          class_added[visuals[i]._class] = EGL_TRUE;
 711          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 712             config_attrs[1] = visuals[i].visual_id;
 713             config_attrs[3] = visuals[i]._class;
 714
 715             rgba_masks[0] = visuals[i].red_mask;
 716             rgba_masks[1] = visuals[i].green_mask;
 717             rgba_masks[2] = visuals[i].blue_mask;
 718             rgba_masks[3] = 0;
 719             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 720                             surface_type, config_attrs, rgba_masks);
 721
 722             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 723              * Otherwise it will only match a 32-bit RGBA visual.  On a
 724              * composited window manager on X11, this will make all of the
 725              * EGLConfigs with destination alpha get blended by the
 726              * compositor.  This is probably not what the application
 727              * wants... especially on drivers that only have 32-bit RGBA
 728              * EGLConfigs! */
 729             if (d.data->depth == 24) {
 730                rgba_masks[3] =
 731                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 732                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 733                                surface_type, config_attrs, rgba_masks);
 734             }
 735          }
 736       }
 737
 738       xcb_depth_next(&d);
 739    }
 740
 741    if (!_eglGetArraySize(disp->Configs)) {
 742       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 743       return EGL_FALSE;
 744    }
 745
 746    return EGL_TRUE;
 747 }
 748
 749 static EGLBoolean
 750 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 751                  _EGLSurface *draw, xcb_xfixes_region_t region)
 752 {
 753    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 754    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 755    enum xcb_dri2_attachment_t render_attachment;
 756    xcb_dri2_copy_region_cookie_t cookie;
 757
 758    /* No-op for a pixmap or pbuffer surface */
 759    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 760       return EGL_TRUE;
 761
 762    if (dri2_dpy->flush)
 763       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 764
 765    if (dri2_surf->have_fake_front)
 766       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 767    else
 768       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 769
 770    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 771                                            dri2_surf->drawable,
 772                                            region,
 773                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 774                                            render_attachment);
 775    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 776
 777    return EGL_TRUE;
 778 }
 779
 780 static int64_t
 781 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 782                           int64_t msc, int64_t divisor, int64_t remainder)
 783 {
 784    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 785    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 786    uint32_t msc_hi = msc >> 32;
 787    uint32_t msc_lo = msc & 0xffffffff;
 788    uint32_t divisor_hi = divisor >> 32;
 789    uint32_t divisor_lo = divisor & 0xffffffff;
 790    uint32_t remainder_hi = remainder >> 32;
 791    uint32_t remainder_lo = remainder & 0xffffffff;
 792    xcb_dri2_swap_buffers_cookie_t cookie;
 793    xcb_dri2_swap_buffers_reply_t *reply;
 794    int64_t swap_count = -1;
 795
 796    /* No-op for a pixmap or pbuffer surface */
 797    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 798       return 0;
 799
 800    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 801       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 802
 803    dri2_flush_drawable_for_swapbuffers(disp, draw);
 804
 805    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 806                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 807
 808    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 809
 810    if (reply) {
 811       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 812       free(reply);
 813    }
 814
 815    /* Since we aren't watching for the server's invalidate events like we're
 816     * supposed to (due to XCB providing no mechanism for filtering the events
 817     * the way xlib does), and SwapBuffers is a common cause of invalidate
 818     * events, just shove one down to the driver, even though we haven't told
 819     * the driver that we're the kind of loader that provides reliable
 820     * invalidate events.  This causes the driver to request buffers again at
 821     * its next draw, so that we get the correct buffers if a pageflip
 822     * happened.  The driver should still be using the viewport hack to catch
 823     * window resizes.
 824     */
 825    if (dri2_dpy->flush &&
 826        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 827       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 828
 829    return swap_count;
 830 }
 831
 832 static EGLBoolean
 833 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 834 {
 835    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 836    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 837
 838    if (dri2_dpy->dri2) {
 839       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 840    } else {
 841       assert(dri2_dpy->swrast);
 842
 843       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 844       return EGL_TRUE;
 845    }
 846 }
 847
 848 static EGLBoolean
 849 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 850                              _EGLSurface *draw,
 851                              EGLint numRects, const EGLint *rects)
 852 {
 853    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 854    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 855    EGLBoolean ret;
 856    xcb_xfixes_region_t region;
 857    xcb_rectangle_t rectangles[16];
 858    int i;
 859
 860    if (numRects > (int)ARRAY_SIZE(rectangles))
 861       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 862
 863    for (i = 0; i < numRects; i++) {
 864       rectangles[i].x = rects[i * 4];
 865       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 866       rectangles[i].width = rects[i * 4 + 2];
 867       rectangles[i].height = rects[i * 4 + 3];
 868    }
 869
 870    region = xcb_generate_id(dri2_dpy->conn);
 871    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 872    ret = dri2_copy_region(drv, disp, draw, region);
 873    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 874
 875    return ret;
 876 }
 877
 878 static EGLBoolean
 879 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 880                      EGLint x, EGLint y, EGLint width, EGLint height)
 881 {
 882    const EGLint rect[4] = { x, y, width, height };
 883
 884    if (x < 0 || y < 0 || width < 0 || height < 0)
 885       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 886
 887    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 888 }
 889
 890 static EGLBoolean
 891 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 892                        EGLint interval)
 893 {
 894    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 895    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 896
 897    if (interval > surf->Config->MaxSwapInterval)
 898       interval = surf->Config->MaxSwapInterval;
 899    else if (interval < surf->Config->MinSwapInterval)
 900       interval = surf->Config->MinSwapInterval;
 901
 902    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 903       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 904
 905    surf->SwapInterval = interval;
 906
 907    return EGL_TRUE;
 908 }
 909
 910 static EGLBoolean
 911 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 912                       void *native_pixmap_target)
 913 {
 914    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 915    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 916    xcb_gcontext_t gc;
 917    xcb_pixmap_t target;
 918
 919    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 920    target = (uintptr_t) native_pixmap_target;
 921
 922    (void) drv;
 923
 924    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 925
 926    gc = xcb_generate_id(dri2_dpy->conn);
 927    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 928    xcb_copy_area(dri2_dpy->conn,
 929                   dri2_surf->drawable,
 930                   target,
 931                   gc,
 932                   0, 0,
 933                   0, 0,
 934                   dri2_surf->base.Width,
 935                   dri2_surf->base.Height);
 936    xcb_free_gc(dri2_dpy->conn, gc);
 937
 938    return EGL_TRUE;
 939 }
 940
 941 static _EGLImage *
 942 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 943                              EGLClientBuffer buffer, const EGLint *attr_list)
 944 {
 945    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 946    struct dri2_egl_image *dri2_img;
 947    unsigned int attachments[1];
 948    xcb_drawable_t drawable;
 949    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 950    xcb_dri2_get_buffers_reply_t *buffers_reply;
 951    xcb_dri2_dri2_buffer_t *buffers;
 952    xcb_get_geometry_cookie_t geometry_cookie;
 953    xcb_get_geometry_reply_t *geometry_reply;
 954    xcb_generic_error_t *error;
 955    int stride, format;
 956
 957    (void) ctx;
 958
 959    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 960    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 961    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 962    buffers_cookie =
 963       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 964                                       drawable, 1, 1, attachments);
 965    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 966    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 967                                                buffers_cookie, NULL);
 968    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 969    if (buffers == NULL) {
 970       return NULL;
 971    }
 972
 973    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 974                                             geometry_cookie, &error);
 975    if (geometry_reply == NULL || error != NULL) {
 976       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 977       free(error);
 978       free(buffers_reply);
 979       return NULL;
 980    }
 981
 982    switch (geometry_reply->depth) {
 983    case 16:
 984       format = __DRI_IMAGE_FORMAT_RGB565;
 985       break;
 986    case 24:
 987       format = __DRI_IMAGE_FORMAT_XRGB8888;
 988       break;
 989    case 32:
 990       format = __DRI_IMAGE_FORMAT_ARGB8888;
 991       break;
 992    default:
 993       _eglError(EGL_BAD_PARAMETER,
 994                 "dri2_create_image_khr: unsupported pixmap depth");
 995       free(buffers_reply);
 996       free(geometry_reply);
 997       return NULL;
 998    }
 999
1000    dri2_img = malloc(sizeof *dri2_img);
1001    if (!dri2_img) {
1002       free(buffers_reply);
1003       free(geometry_reply);
1004       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1005       return EGL_NO_IMAGE_KHR;
1006    }
1007
1008    if (!_eglInitImage(&dri2_img->base, disp)) {
1009       free(buffers_reply);
1010       free(geometry_reply);
1011       free(dri2_img);
1012       return EGL_NO_IMAGE_KHR;
1013    }
1014
1015    stride = buffers[0].pitch / buffers[0].cpp;
1016    dri2_img->dri_image =
1017       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1018                                            buffers_reply->width,
1019                                            buffers_reply->height,
1020                                            format,
1021                                            buffers[0].name,
1022                                            stride,
1023                                            dri2_img);
1024
1025    free(buffers_reply);
1026    free(geometry_reply);
1027
1028    return &dri2_img->base;
1029 }
1030
1031 static _EGLImage *
1032 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1033                           _EGLContext *ctx, EGLenum target,
1034                           EGLClientBuffer buffer, const EGLint *attr_list)
1035 {
1036    (void) drv;
1037
1038    switch (target) {
1039    case EGL_NATIVE_PIXMAP_KHR:
1040       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1041    default:
1042       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1043    }
1044 }
1045
1046 static EGLBoolean
1047 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1048                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1049                          EGLuint64KHR *sbc)
1050 {
1051    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1052    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1053    xcb_dri2_get_msc_cookie_t cookie;
1054    xcb_dri2_get_msc_reply_t *reply;
1055
1056    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1057    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1058
1059    if (!reply) {
1060       _eglError(EGL_BAD_ACCESS, __func__);
1061       return EGL_FALSE;
1062    }
1063
1064    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1065    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1066    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1067    free(reply);
1068
1069    return EGL_TRUE;
1070 }
1071
1072 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1073    .authenticate = NULL,
1074    .create_window_surface = dri2_x11_create_window_surface,
1075    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1076    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1077    .destroy_surface = dri2_x11_destroy_surface,
1078    .create_image = dri2_fallback_create_image_khr,
1079    .swap_interval = dri2_fallback_swap_interval,
1080    .swap_buffers = dri2_x11_swap_buffers,
1081    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1082    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1083    .copy_buffers = dri2_x11_copy_buffers,
1084    .query_buffer_age = dri2_fallback_query_buffer_age,
1085    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1086    .get_sync_values = dri2_fallback_get_sync_values,
1087 };
1088
1089 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1090    .authenticate = dri2_x11_authenticate,
1091    .create_window_surface = dri2_x11_create_window_surface,
1092    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1093    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1094    .destroy_surface = dri2_x11_destroy_surface,
1095    .create_image = dri2_x11_create_image_khr,
1096    .swap_interval = dri2_x11_swap_interval,
1097    .swap_buffers = dri2_x11_swap_buffers,
1098    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1099    .swap_buffers_region = dri2_x11_swap_buffers_region,
1100    .post_sub_buffer = dri2_x11_post_sub_buffer,
1101    .copy_buffers = dri2_x11_copy_buffers,
1102    .query_buffer_age = dri2_fallback_query_buffer_age,
1103    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1104    .get_sync_values = dri2_x11_get_sync_values,
1105 };
1106
1107 static EGLBoolean
1108 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1109 {
1110    struct dri2_egl_display *dri2_dpy;
1111
1112    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1113    if (!dri2_dpy)
1114       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1115
1116    disp->DriverData = (void *) dri2_dpy;
1117    if (disp->PlatformDisplay == NULL) {
1118       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1119       dri2_dpy->own_device = true;
1120    } else {
1121       Display *dpy = disp->PlatformDisplay;
1122
1123       dri2_dpy->conn = XGetXCBConnection(dpy);
1124       dri2_dpy->screen = DefaultScreen(dpy);
1125    }
1126
1127    if (xcb_connection_has_error(dri2_dpy->conn)) {
1128       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1129       goto cleanup_dpy;
1130    }
1131
1132    /*
1133     * Every hardware driver_name is set using strdup. Doing the same in
1134     * here will allow is to simply free the memory at dri2_terminate().
1135     */
1136    dri2_dpy->driver_name = strdup("swrast");
1137    if (!dri2_load_driver_swrast(disp))
1138       goto cleanup_conn;
1139
1140    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1141    dri2_dpy->swrast_loader_extension.base.version = 2;
1142    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1143    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1144    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1145
1146    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1147    dri2_dpy->extensions[1] = NULL;
1148    dri2_dpy->extensions[2] = NULL;
1149
1150    if (!dri2_create_screen(disp))
1151       goto cleanup_driver;
1152
1153    if (dri2_dpy->conn) {
1154       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1155          goto cleanup_configs;
1156    }
1157
1158    /* Fill vtbl last to prevent accidentally calling virtual function during
1159     * initialization.
1160     */
1161    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1162
1163    return EGL_TRUE;
1164
1165  cleanup_configs:
1166    _eglCleanupDisplay(disp);
1167    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1168  cleanup_driver:
1169    dlclose(dri2_dpy->driver);
1170  cleanup_conn:
1171    free(dri2_dpy->driver_name);
1172    if (disp->PlatformDisplay == NULL)
1173       xcb_disconnect(dri2_dpy->conn);
1174  cleanup_dpy:
1175    free(dri2_dpy);
1176
1177    return EGL_FALSE;
1178 }
1179
1180 static void
1181 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1182 {
1183    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1184    int arbitrary_max_interval = 1000;
1185
1186    /* default behavior for no SwapBuffers support: no vblank syncing
1187     * either.
1188     */
1189    dri2_dpy->min_swap_interval = 0;
1190    dri2_dpy->max_swap_interval = 0;
1191
1192    if (!dri2_dpy->swap_available)
1193       return;
1194
1195    /* If we do have swapbuffers, then we can support pretty much any swap
1196     * interval, but we allow driconf to override applications.
1197     */
1198    if (dri2_dpy->config)
1199       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1200                                      "vblank_mode", &vblank_mode);
1201    switch (vblank_mode) {
1202    case DRI_CONF_VBLANK_NEVER:
1203       dri2_dpy->min_swap_interval = 0;
1204       dri2_dpy->max_swap_interval = 0;
1205       dri2_dpy->default_swap_interval = 0;
1206       break;
1207    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1208       dri2_dpy->min_swap_interval = 1;
1209       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1210       dri2_dpy->default_swap_interval = 1;
1211       break;
1212    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1213       dri2_dpy->min_swap_interval = 0;
1214       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1215       dri2_dpy->default_swap_interval = 0;
1216       break;
1217    default:
1218    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1219       dri2_dpy->min_swap_interval = 0;
1220       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1221       dri2_dpy->default_swap_interval = 1;
1222       break;
1223    }
1224 }
1225
1226 static EGLBoolean
1227 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1228 {
1229    struct dri2_egl_display *dri2_dpy;
1230
1231    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1232    if (!dri2_dpy)
1233       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1234
1235    disp->DriverData = (void *) dri2_dpy;
1236    if (disp->PlatformDisplay == NULL) {
1237       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1238       dri2_dpy->own_device = true;
1239    } else {
1240       Display *dpy = disp->PlatformDisplay;
1241
1242       dri2_dpy->conn = XGetXCBConnection(dpy);
1243       dri2_dpy->screen = DefaultScreen(dpy);
1244    }
1245
1246    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1247       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1248       goto cleanup_dpy;
1249    }
1250
1251    if (!dri2_x11_connect(dri2_dpy))
1252       goto cleanup_conn;
1253
1254    if (!dri2_x11_local_authenticate(disp))
1255       goto cleanup_fd;
1256
1257    if (!dri2_load_driver(disp))
1258       goto cleanup_fd;
1259
1260    if (dri2_dpy->dri2_minor >= 1) {
1261       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1262       dri2_dpy->dri2_loader_extension.base.version = 3;
1263       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1264       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1265       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1266          dri2_x11_get_buffers_with_format;
1267    } else {
1268       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1269       dri2_dpy->dri2_loader_extension.base.version = 2;
1270       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1271       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1272       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1273    }
1274
1275    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1276    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1277    dri2_dpy->extensions[2] = NULL;
1278
1279    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1280    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1281
1282    if (!dri2_create_screen(disp))
1283       goto cleanup_driver;
1284
1285    dri2_x11_setup_swap_interval(dri2_dpy);
1286
1287    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1288    disp->Extensions.NOK_swap_region = EGL_TRUE;
1289    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1290    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1291    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1292
1293 #ifdef HAVE_WAYLAND_PLATFORM
1294    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1295 #endif
1296
1297    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1298       goto cleanup_configs;
1299
1300    /* Fill vtbl last to prevent accidentally calling virtual function during
1301     * initialization.
1302     */
1303    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1304
1305    return EGL_TRUE;
1306
1307  cleanup_configs:
1308    _eglCleanupDisplay(disp);
1309    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1310  cleanup_driver:
1311    dlclose(dri2_dpy->driver);
1312  cleanup_fd:
1313    close(dri2_dpy->fd);
1314  cleanup_conn:
1315    if (disp->PlatformDisplay == NULL)
1316       xcb_disconnect(dri2_dpy->conn);
1317  cleanup_dpy:
1318    free(dri2_dpy);
1319
1320    return EGL_FALSE;
1321 }
1322
1323 EGLBoolean
1324 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1325 {
1326    EGLBoolean initialized = EGL_TRUE;
1327
1328    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1329
1330    if (x11_dri2_accel) {
1331       if (!dri2_initialize_x11_dri2(drv, disp)) {
1332          initialized = dri2_initialize_x11_swrast(drv, disp);
1333       }
1334    } else {
1335       initialized = dri2_initialize_x11_swrast(drv, disp);
1336    }
1337
1338    return initialized;
1339 }
1340