src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <stdio.h>
  32 #include <limits.h>
  33 #include <dlfcn.h>
  34 #include <fcntl.h>
  35 #include <errno.h>
  36 #include <unistd.h>
  37 #ifdef HAVE_LIBDRM
  38 #include <xf86drm.h>
  39 #endif
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42
  43 #include "egl_dri2.h"
  44 #include "egl_dri2_fallbacks.h"
  45
  46 static EGLBoolean
  47 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  48                        EGLint interval);
  49
  50 static void
  51 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  52                      struct dri2_egl_surface * dri2_surf,
  53                      int depth)
  54 {
  55    uint32_t           mask;
  56    const uint32_t     function = GXcopy;
  57    uint32_t           valgc[2];
  58
  59    /* create GC's */
  60    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  61    mask = XCB_GC_FUNCTION;
  62    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  63
  64    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  65    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  66    valgc[0] = function;
  67    valgc[1] = False;
  68    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  69    dri2_surf->depth = depth;
  70    switch (depth) {
  71       case 32:
  72       case 24:
  73          dri2_surf->bytes_per_pixel = 4;
  74          break;
  75       case 16:
  76          dri2_surf->bytes_per_pixel = 2;
  77          break;
  78       case 8:
  79          dri2_surf->bytes_per_pixel = 1;
  80          break;
  81       case 0:
  82          dri2_surf->bytes_per_pixel = 0;
  83          break;
  84       default:
  85          _eglLog(_EGL_WARNING, "unsupported depth %d", depth);
  86    }
  87 }
  88
  89 static void
  90 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  91                       struct dri2_egl_surface * dri2_surf)
  92 {
  93    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  94    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  95 }
  96
  97 static void
  98 swrastGetDrawableInfo(__DRIdrawable * draw,
  99                       int *x, int *y, int *w, int *h,
 100                       void *loaderPrivate)
 101 {
 102    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 103    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 104
 105    xcb_get_geometry_cookie_t cookie;
 106    xcb_get_geometry_reply_t *reply;
 107    xcb_generic_error_t *error;
 108
 109    *w = *h = 0;
 110    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 111    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 112    if (reply == NULL)
 113       return;
 114
 115    if (error != NULL) {
 116       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 117       free(error);
 118    } else {
 119       *w = reply->width;
 120       *h = reply->height;
 121    }
 122    free(reply);
 123 }
 124
 125 static void
 126 swrastPutImage(__DRIdrawable * draw, int op,
 127                int x, int y, int w, int h,
 128                char *data, void *loaderPrivate)
 129 {
 130    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 131    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 132
 133    xcb_gcontext_t gc;
 134
 135    switch (op) {
 136    case __DRI_SWRAST_IMAGE_OP_DRAW:
 137       gc = dri2_surf->gc;
 138       break;
 139    case __DRI_SWRAST_IMAGE_OP_SWAP:
 140       gc = dri2_surf->swapgc;
 141       break;
 142    default:
 143       return;
 144    }
 145
 146    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 147                  gc, w, h, x, y, 0, dri2_surf->depth,
 148                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 149 }
 150
 151 static void
 152 swrastGetImage(__DRIdrawable * read,
 153                int x, int y, int w, int h,
 154                char *data, void *loaderPrivate)
 155 {
 156    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 157    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 158
 159    xcb_get_image_cookie_t cookie;
 160    xcb_get_image_reply_t *reply;
 161    xcb_generic_error_t *error;
 162
 163    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 164                            dri2_surf->drawable, x, y, w, h, ~0);
 165    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 166    if (reply == NULL)
 167       return;
 168
 169    if (error != NULL) {
 170       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 171       free(error);
 172    } else {
 173       uint32_t bytes = xcb_get_image_data_length(reply);
 174       uint8_t *idata = xcb_get_image_data(reply);
 175       memcpy(data, idata, bytes);
 176    }
 177    free(reply);
 178 }
 179
 180
 181 static xcb_screen_t *
 182 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 183 {
 184     for (; iter.rem; --screen, xcb_screen_next(&iter))
 185         if (screen == 0)
 186             return iter.data;
 187
 188     return NULL;
 189 }
 190
 191
 192 /**
 193  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 194  */
 195 static _EGLSurface *
 196 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 197                         _EGLConfig *conf, void *native_surface,
 198                         const EGLint *attrib_list)
 199 {
 200    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 201    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 202    struct dri2_egl_surface *dri2_surf;
 203    xcb_get_geometry_cookie_t cookie;
 204    xcb_get_geometry_reply_t *reply;
 205    xcb_screen_iterator_t s;
 206    xcb_generic_error_t *error;
 207    xcb_drawable_t drawable;
 208    xcb_screen_t *screen;
 209
 210    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 211    drawable = (uintptr_t) native_surface;
 212
 213    (void) drv;
 214
 215    dri2_surf = malloc(sizeof *dri2_surf);
 216    if (!dri2_surf) {
 217       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 218       return NULL;
 219    }
 220
 221    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 222       goto cleanup_surf;
 223
 224    dri2_surf->region = XCB_NONE;
 225    if (type == EGL_PBUFFER_BIT) {
 226       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 227       screen = get_xcb_screen(s, dri2_dpy->screen);
 228       if (!screen) {
 229          _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 230          goto cleanup_surf;
 231       }
 232
 233       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 234       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 235                        dri2_surf->drawable, screen->root,
 236                         dri2_surf->base.Width, dri2_surf->base.Height);
 237    } else {
 238       dri2_surf->drawable = drawable;
 239    }
 240
 241    if (dri2_dpy->dri2) {
 242       dri2_surf->dri_drawable =
 243          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 244                                                type == EGL_WINDOW_BIT ?
 245                                                dri2_conf->dri_double_config :
 246                                                dri2_conf->dri_single_config,
 247                                                dri2_surf);
 248    } else {
 249       assert(dri2_dpy->swrast);
 250       dri2_surf->dri_drawable =
 251          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 252                                                  dri2_conf->dri_double_config,
 253                                                  dri2_surf);
 254    }
 255
 256    if (dri2_surf->dri_drawable == NULL) {
 257       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 258       goto cleanup_pixmap;
 259    }
 260
 261    if (dri2_dpy->dri2) {
 262       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 263    } else {
 264       swrastCreateDrawable(dri2_dpy, dri2_surf, _eglGetConfigKey(conf, EGL_BUFFER_SIZE));
 265    }
 266
 267    if (type != EGL_PBUFFER_BIT) {
 268       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 269       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 270       if (reply == NULL || error != NULL) {
 271          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 272          free(error);
 273          goto cleanup_dri_drawable;
 274       }
 275
 276       dri2_surf->base.Width = reply->width;
 277       dri2_surf->base.Height = reply->height;
 278       free(reply);
 279    }
 280
 281    /* we always copy the back buffer to front */
 282    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 283
 284    return &dri2_surf->base;
 285
 286  cleanup_dri_drawable:
 287    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 288  cleanup_pixmap:
 289    if (type == EGL_PBUFFER_BIT)
 290       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 291  cleanup_surf:
 292    free(dri2_surf);
 293
 294    return NULL;
 295 }
 296
 297 /**
 298  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 299  */
 300 static _EGLSurface *
 301 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 302                                _EGLConfig *conf, void *native_window,
 303                                const EGLint *attrib_list)
 304 {
 305    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 306    _EGLSurface *surf;
 307
 308    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 309                                   native_window, attrib_list);
 310    if (surf != NULL) {
 311       /* When we first create the DRI2 drawable, its swap interval on the
 312        * server side is 1.
 313        */
 314       surf->SwapInterval = 1;
 315
 316       /* Override that with a driconf-set value. */
 317       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 318    }
 319
 320    return surf;
 321 }
 322
 323 static _EGLSurface *
 324 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 325                                _EGLConfig *conf, void *native_pixmap,
 326                                const EGLint *attrib_list)
 327 {
 328    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 329                                   native_pixmap, attrib_list);
 330 }
 331
 332 static _EGLSurface *
 333 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 334                                 _EGLConfig *conf, const EGLint *attrib_list)
 335 {
 336    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 337                                   XCB_WINDOW_NONE, attrib_list);
 338 }
 339
 340 static EGLBoolean
 341 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 342 {
 343    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 344    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 345
 346    (void) drv;
 347
 348    if (!_eglPutSurface(surf))
 349       return EGL_TRUE;
 350
 351    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 352
 353    if (dri2_dpy->dri2) {
 354       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 355    } else {
 356       assert(dri2_dpy->swrast);
 357       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 358    }
 359
 360    if (surf->Type == EGL_PBUFFER_BIT)
 361       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 362
 363    free(surf);
 364
 365    return EGL_TRUE;
 366 }
 367
 368 /**
 369  * Process list of buffer received from the server
 370  *
 371  * Processes the list of buffers received in a reply from the server to either
 372  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 373  */
 374 static void
 375 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 376                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 377 {
 378    struct dri2_egl_display *dri2_dpy =
 379       dri2_egl_display(dri2_surf->base.Resource.Display);
 380    xcb_rectangle_t rectangle;
 381    unsigned i;
 382
 383    dri2_surf->buffer_count = count;
 384    dri2_surf->have_fake_front = 0;
 385
 386    /* This assumes the DRI2 buffer attachment tokens matches the
 387     * __DRIbuffer tokens. */
 388    for (i = 0; i < count; i++) {
 389       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 390       dri2_surf->buffers[i].name = buffers[i].name;
 391       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 392       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 393       dri2_surf->buffers[i].flags = buffers[i].flags;
 394
 395       /* We only use the DRI drivers single buffer configs.  This
 396        * means that if we try to render to a window, DRI2 will give us
 397        * the fake front buffer, which we'll use as a back buffer.
 398        * Note that EGL doesn't require that several clients rendering
 399        * to the same window must see the same aux buffers. */
 400       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 401          dri2_surf->have_fake_front = 1;
 402    }
 403
 404    if (dri2_surf->region != XCB_NONE)
 405       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 406
 407    rectangle.x = 0;
 408    rectangle.y = 0;
 409    rectangle.width = dri2_surf->base.Width;
 410    rectangle.height = dri2_surf->base.Height;
 411    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 412    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 413 }
 414
 415 static __DRIbuffer *
 416 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 417                      int *width, int *height,
 418                      unsigned int *attachments, int count,
 419                      int *out_count, void *loaderPrivate)
 420 {
 421    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 422    struct dri2_egl_display *dri2_dpy =
 423       dri2_egl_display(dri2_surf->base.Resource.Display);
 424    xcb_dri2_dri2_buffer_t *buffers;
 425    xcb_dri2_get_buffers_reply_t *reply;
 426    xcb_dri2_get_buffers_cookie_t cookie;
 427
 428    (void) driDrawable;
 429
 430    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 431                                             dri2_surf->drawable,
 432                                             count, count, attachments);
 433    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 434    buffers = xcb_dri2_get_buffers_buffers (reply);
 435    if (buffers == NULL)
 436       return NULL;
 437
 438    *out_count = reply->count;
 439    dri2_surf->base.Width = *width = reply->width;
 440    dri2_surf->base.Height = *height = reply->height;
 441    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 442
 443    free(reply);
 444
 445    return dri2_surf->buffers;
 446 }
 447
 448 static __DRIbuffer *
 449 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 450                                  int *width, int *height,
 451                                  unsigned int *attachments, int count,
 452                                  int *out_count, void *loaderPrivate)
 453 {
 454    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 455    struct dri2_egl_display *dri2_dpy =
 456       dri2_egl_display(dri2_surf->base.Resource.Display);
 457    xcb_dri2_dri2_buffer_t *buffers;
 458    xcb_dri2_get_buffers_with_format_reply_t *reply;
 459    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 460    xcb_dri2_attach_format_t *format_attachments;
 461
 462    (void) driDrawable;
 463
 464    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 465    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 466                                                         dri2_surf->drawable,
 467                                                         count, count,
 468                                                         format_attachments);
 469
 470    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 471                                                    cookie, NULL);
 472    if (reply == NULL)
 473       return NULL;
 474
 475    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 476    dri2_surf->base.Width = *width = reply->width;
 477    dri2_surf->base.Height = *height = reply->height;
 478    *out_count = reply->count;
 479    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 480
 481    free(reply);
 482
 483    return dri2_surf->buffers;
 484 }
 485
 486 static void
 487 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 488 {
 489    (void) driDrawable;
 490
 491    /* FIXME: Does EGL support front buffer rendering at all? */
 492
 493 #if 0
 494    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 495
 496    dri2WaitGL(dri2_surf);
 497 #else
 498    (void) loaderPrivate;
 499 #endif
 500 }
 501
 502 static EGLBoolean
 503 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 504 {
 505    xcb_xfixes_query_version_reply_t *xfixes_query;
 506    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 507    xcb_dri2_query_version_reply_t *dri2_query;
 508    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 509    xcb_dri2_connect_reply_t *connect;
 510    xcb_dri2_connect_cookie_t connect_cookie;
 511    xcb_generic_error_t *error;
 512    xcb_screen_iterator_t s;
 513    xcb_screen_t *screen;
 514    char *driver_name, *device_name;
 515    const xcb_query_extension_reply_t *extension;
 516
 517    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 518    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 519
 520    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 521    if (!(extension && extension->present))
 522       return EGL_FALSE;
 523
 524    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 525    if (!(extension && extension->present))
 526       return EGL_FALSE;
 527
 528    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 529                                                   XCB_XFIXES_MAJOR_VERSION,
 530                                                   XCB_XFIXES_MINOR_VERSION);
 531
 532    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 533                                                XCB_DRI2_MAJOR_VERSION,
 534                                                XCB_DRI2_MINOR_VERSION);
 535
 536    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 537    screen = get_xcb_screen(s, dri2_dpy->screen);
 538    if (!screen) {
 539       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_connect");
 540       return EGL_FALSE;
 541    }
 542    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 543                                    XCB_DRI2_DRIVER_TYPE_DRI);
 544
 545    xfixes_query =
 546       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 547                                       xfixes_query_cookie, &error);
 548    if (xfixes_query == NULL ||
 549        error != NULL || xfixes_query->major_version < 2) {
 550       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 551       free(error);
 552       return EGL_FALSE;
 553    }
 554    free(xfixes_query);
 555
 556    dri2_query =
 557       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 558    if (dri2_query == NULL || error != NULL) {
 559       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 560       free(error);
 561       return EGL_FALSE;
 562    }
 563    dri2_dpy->dri2_major = dri2_query->major_version;
 564    dri2_dpy->dri2_minor = dri2_query->minor_version;
 565    free(dri2_query);
 566
 567    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 568    if (connect == NULL ||
 569        connect->driver_name_length + connect->device_name_length == 0) {
 570       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 571       return EGL_FALSE;
 572    }
 573
 574    driver_name = xcb_dri2_connect_driver_name (connect);
 575    dri2_dpy->driver_name =
 576       strndup(driver_name,
 577               xcb_dri2_connect_driver_name_length(connect));
 578
 579    device_name = xcb_dri2_connect_device_name (connect);
 580
 581    dri2_dpy->device_name =
 582       strndup(device_name,
 583               xcb_dri2_connect_device_name_length(connect));
 584
 585    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 586       free(dri2_dpy->device_name);
 587       free(dri2_dpy->driver_name);
 588       free(connect);
 589       return EGL_FALSE;
 590    }
 591    free(connect);
 592
 593    return EGL_TRUE;
 594 }
 595
 596 static int
 597 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 598 {
 599    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 600    xcb_dri2_authenticate_reply_t *authenticate;
 601    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 602    xcb_screen_iterator_t s;
 603    xcb_screen_t *screen;
 604    int ret = 0;
 605
 606    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 607
 608    screen = get_xcb_screen(s, dri2_dpy->screen);
 609    if (!screen) {
 610       _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_authenticate");
 611       return -1;
 612    }
 613
 614    authenticate_cookie =
 615       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 616    authenticate =
 617       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 618
 619    if (authenticate == NULL || !authenticate->authenticated)
 620       ret = -1;
 621
 622    free(authenticate);
 623
 624    return ret;
 625 }
 626
 627 static EGLBoolean
 628 dri2_x11_local_authenticate(_EGLDisplay *disp)
 629 {
 630 #ifdef HAVE_LIBDRM
 631    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 632    drm_magic_t magic;
 633
 634    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 635       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 636       return EGL_FALSE;
 637    }
 638
 639    if (dri2_x11_authenticate(disp, magic) < 0) {
 640       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 641       return EGL_FALSE;
 642    }
 643 #endif
 644    return EGL_TRUE;
 645 }
 646
 647 static EGLBoolean
 648 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 649                                  _EGLDisplay *disp)
 650 {
 651    xcb_screen_iterator_t s;
 652    xcb_depth_iterator_t d;
 653    xcb_visualtype_t *visuals;
 654    int i, j, id;
 655    unsigned int rgba_masks[4];
 656    EGLint surface_type;
 657    EGLint config_attrs[] = {
 658            EGL_NATIVE_VISUAL_ID,   0,
 659            EGL_NATIVE_VISUAL_TYPE, 0,
 660            EGL_NONE
 661    };
 662
 663    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 664    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 665    id = 1;
 666
 667    surface_type =
 668       EGL_WINDOW_BIT |
 669       EGL_PIXMAP_BIT |
 670       EGL_PBUFFER_BIT |
 671       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 672
 673    while (d.rem > 0) {
 674       EGLBoolean class_added[6] = { 0, };
 675
 676       visuals = xcb_depth_visuals(d.data);
 677       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 678          if (class_added[visuals[i]._class])
 679             continue;
 680
 681          class_added[visuals[i]._class] = EGL_TRUE;
 682          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 683             config_attrs[1] = visuals[i].visual_id;
 684             config_attrs[3] = visuals[i]._class;
 685
 686             rgba_masks[0] = visuals[i].red_mask;
 687             rgba_masks[1] = visuals[i].green_mask;
 688             rgba_masks[2] = visuals[i].blue_mask;
 689             rgba_masks[3] = 0;
 690             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 691                             surface_type, config_attrs, rgba_masks);
 692
 693             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 694              * Otherwise it will only match a 32-bit RGBA visual.  On a
 695              * composited window manager on X11, this will make all of the
 696              * EGLConfigs with destination alpha get blended by the
 697              * compositor.  This is probably not what the application
 698              * wants... especially on drivers that only have 32-bit RGBA
 699              * EGLConfigs! */
 700             if (d.data->depth == 24) {
 701                rgba_masks[3] =
 702                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 703                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 704                                surface_type, config_attrs, rgba_masks);
 705             }
 706          }
 707       }
 708
 709       xcb_depth_next(&d);
 710    }
 711
 712    if (!_eglGetArraySize(disp->Configs)) {
 713       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 714       return EGL_FALSE;
 715    }
 716
 717    return EGL_TRUE;
 718 }
 719
 720 static EGLBoolean
 721 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 722                  _EGLSurface *draw, xcb_xfixes_region_t region)
 723 {
 724    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 725    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 726    enum xcb_dri2_attachment_t render_attachment;
 727    xcb_dri2_copy_region_cookie_t cookie;
 728
 729    /* No-op for a pixmap or pbuffer surface */
 730    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 731       return EGL_TRUE;
 732
 733    if (dri2_dpy->flush)
 734       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 735
 736    if (dri2_surf->have_fake_front)
 737       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 738    else
 739       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 740
 741    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 742                                            dri2_surf->drawable,
 743                                            region,
 744                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 745                                            render_attachment);
 746    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 747
 748    return EGL_TRUE;
 749 }
 750
 751 static int64_t
 752 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 753                           int64_t msc, int64_t divisor, int64_t remainder)
 754 {
 755    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 756    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 757    uint32_t msc_hi = msc >> 32;
 758    uint32_t msc_lo = msc & 0xffffffff;
 759    uint32_t divisor_hi = divisor >> 32;
 760    uint32_t divisor_lo = divisor & 0xffffffff;
 761    uint32_t remainder_hi = remainder >> 32;
 762    uint32_t remainder_lo = remainder & 0xffffffff;
 763    xcb_dri2_swap_buffers_cookie_t cookie;
 764    xcb_dri2_swap_buffers_reply_t *reply;
 765    int64_t swap_count = -1;
 766
 767    /* No-op for a pixmap or pbuffer surface */
 768    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 769       return 0;
 770
 771    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 772       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 773
 774    dri2_flush_drawable_for_swapbuffers(disp, draw);
 775
 776    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 777                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 778
 779    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 780
 781    if (reply) {
 782       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 783       free(reply);
 784    }
 785
 786    /* Since we aren't watching for the server's invalidate events like we're
 787     * supposed to (due to XCB providing no mechanism for filtering the events
 788     * the way xlib does), and SwapBuffers is a common cause of invalidate
 789     * events, just shove one down to the driver, even though we haven't told
 790     * the driver that we're the kind of loader that provides reliable
 791     * invalidate events.  This causes the driver to request buffers again at
 792     * its next draw, so that we get the correct buffers if a pageflip
 793     * happened.  The driver should still be using the viewport hack to catch
 794     * window resizes.
 795     */
 796    if (dri2_dpy->flush &&
 797        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 798       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 799
 800    return swap_count;
 801 }
 802
 803 static EGLBoolean
 804 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 805 {
 806    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 807    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 808
 809    if (dri2_dpy->dri2) {
 810       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 811    } else {
 812       assert(dri2_dpy->swrast);
 813
 814       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 815       return EGL_TRUE;
 816    }
 817 }
 818
 819 static EGLBoolean
 820 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 821                              _EGLSurface *draw,
 822                              EGLint numRects, const EGLint *rects)
 823 {
 824    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 825    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 826    EGLBoolean ret;
 827    xcb_xfixes_region_t region;
 828    xcb_rectangle_t rectangles[16];
 829    int i;
 830
 831    if (numRects > (int)ARRAY_SIZE(rectangles))
 832       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 833
 834    for (i = 0; i < numRects; i++) {
 835       rectangles[i].x = rects[i * 4];
 836       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 837       rectangles[i].width = rects[i * 4 + 2];
 838       rectangles[i].height = rects[i * 4 + 3];
 839    }
 840
 841    region = xcb_generate_id(dri2_dpy->conn);
 842    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 843    ret = dri2_copy_region(drv, disp, draw, region);
 844    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 845
 846    return ret;
 847 }
 848
 849 static EGLBoolean
 850 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 851                      EGLint x, EGLint y, EGLint width, EGLint height)
 852 {
 853    const EGLint rect[4] = { x, y, width, height };
 854
 855    if (x < 0 || y < 0 || width < 0 || height < 0)
 856       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 857
 858    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 859 }
 860
 861 static EGLBoolean
 862 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 863                        EGLint interval)
 864 {
 865    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 866    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 867
 868    if (interval > surf->Config->MaxSwapInterval)
 869       interval = surf->Config->MaxSwapInterval;
 870    else if (interval < surf->Config->MinSwapInterval)
 871       interval = surf->Config->MinSwapInterval;
 872
 873    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 874       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 875
 876    surf->SwapInterval = interval;
 877
 878    return EGL_TRUE;
 879 }
 880
 881 static EGLBoolean
 882 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 883                       void *native_pixmap_target)
 884 {
 885    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 886    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 887    xcb_gcontext_t gc;
 888    xcb_pixmap_t target;
 889
 890    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 891    target = (uintptr_t) native_pixmap_target;
 892
 893    (void) drv;
 894
 895    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 896
 897    gc = xcb_generate_id(dri2_dpy->conn);
 898    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 899    xcb_copy_area(dri2_dpy->conn,
 900                   dri2_surf->drawable,
 901                   target,
 902                   gc,
 903                   0, 0,
 904                   0, 0,
 905                   dri2_surf->base.Width,
 906                   dri2_surf->base.Height);
 907    xcb_free_gc(dri2_dpy->conn, gc);
 908
 909    return EGL_TRUE;
 910 }
 911
 912 static _EGLImage *
 913 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 914                              EGLClientBuffer buffer, const EGLint *attr_list)
 915 {
 916    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 917    struct dri2_egl_image *dri2_img;
 918    unsigned int attachments[1];
 919    xcb_drawable_t drawable;
 920    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 921    xcb_dri2_get_buffers_reply_t *buffers_reply;
 922    xcb_dri2_dri2_buffer_t *buffers;
 923    xcb_get_geometry_cookie_t geometry_cookie;
 924    xcb_get_geometry_reply_t *geometry_reply;
 925    xcb_generic_error_t *error;
 926    int stride, format;
 927
 928    (void) ctx;
 929
 930    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 931    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 932    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 933    buffers_cookie =
 934       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 935                                       drawable, 1, 1, attachments);
 936    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 937    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 938                                                buffers_cookie, NULL);
 939    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 940    if (buffers == NULL) {
 941       return NULL;
 942    }
 943
 944    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 945                                             geometry_cookie, &error);
 946    if (geometry_reply == NULL || error != NULL) {
 947       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 948       free(error);
 949       free(buffers_reply);
 950       return NULL;
 951    }
 952
 953    switch (geometry_reply->depth) {
 954    case 16:
 955       format = __DRI_IMAGE_FORMAT_RGB565;
 956       break;
 957    case 24:
 958       format = __DRI_IMAGE_FORMAT_XRGB8888;
 959       break;
 960    case 32:
 961       format = __DRI_IMAGE_FORMAT_ARGB8888;
 962       break;
 963    default:
 964       _eglError(EGL_BAD_PARAMETER,
 965                 "dri2_create_image_khr: unsupported pixmap depth");
 966       free(buffers_reply);
 967       free(geometry_reply);
 968       return NULL;
 969    }
 970
 971    dri2_img = malloc(sizeof *dri2_img);
 972    if (!dri2_img) {
 973       free(buffers_reply);
 974       free(geometry_reply);
 975       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 976       return EGL_NO_IMAGE_KHR;
 977    }
 978
 979    if (!_eglInitImage(&dri2_img->base, disp)) {
 980       free(buffers_reply);
 981       free(geometry_reply);
 982       free(dri2_img);
 983       return EGL_NO_IMAGE_KHR;
 984    }
 985
 986    stride = buffers[0].pitch / buffers[0].cpp;
 987    dri2_img->dri_image =
 988       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 989                                            buffers_reply->width,
 990                                            buffers_reply->height,
 991                                            format,
 992                                            buffers[0].name,
 993                                            stride,
 994                                            dri2_img);
 995
 996    free(buffers_reply);
 997    free(geometry_reply);
 998
 999    return &dri2_img->base;
1000 }
1001
1002 static _EGLImage *
1003 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1004                           _EGLContext *ctx, EGLenum target,
1005                           EGLClientBuffer buffer, const EGLint *attr_list)
1006 {
1007    (void) drv;
1008
1009    switch (target) {
1010    case EGL_NATIVE_PIXMAP_KHR:
1011       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1012    default:
1013       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1014    }
1015 }
1016
1017 static _EGLImage*
1018 dri2_x11_swrast_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1019                                  _EGLContext *ctx, EGLenum target,
1020                                  EGLClientBuffer buffer,
1021                                  const EGLint *attr_list)
1022 {
1023    return NULL;
1024 }
1025
1026 static EGLBoolean
1027 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1028                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1029                          EGLuint64KHR *sbc)
1030 {
1031    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1032    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1033    xcb_dri2_get_msc_cookie_t cookie;
1034    xcb_dri2_get_msc_reply_t *reply;
1035
1036    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1037    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1038
1039    if (!reply) {
1040       _eglError(EGL_BAD_ACCESS, __func__);
1041       return EGL_FALSE;
1042    }
1043
1044    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1045    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1046    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1047    free(reply);
1048
1049    return EGL_TRUE;
1050 }
1051
1052 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1053    .authenticate = NULL,
1054    .create_window_surface = dri2_x11_create_window_surface,
1055    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1056    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1057    .destroy_surface = dri2_x11_destroy_surface,
1058    .create_image = dri2_x11_swrast_create_image_khr,
1059    .swap_interval = dri2_fallback_swap_interval,
1060    .swap_buffers = dri2_x11_swap_buffers,
1061    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1062    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1063    .copy_buffers = dri2_x11_copy_buffers,
1064    .query_buffer_age = dri2_fallback_query_buffer_age,
1065    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1066    .get_sync_values = dri2_fallback_get_sync_values,
1067 };
1068
1069 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1070    .authenticate = dri2_x11_authenticate,
1071    .create_window_surface = dri2_x11_create_window_surface,
1072    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1073    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1074    .destroy_surface = dri2_x11_destroy_surface,
1075    .create_image = dri2_x11_create_image_khr,
1076    .swap_interval = dri2_x11_swap_interval,
1077    .swap_buffers = dri2_x11_swap_buffers,
1078    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1079    .swap_buffers_region = dri2_x11_swap_buffers_region,
1080    .post_sub_buffer = dri2_x11_post_sub_buffer,
1081    .copy_buffers = dri2_x11_copy_buffers,
1082    .query_buffer_age = dri2_fallback_query_buffer_age,
1083    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1084    .get_sync_values = dri2_x11_get_sync_values,
1085 };
1086
1087 static EGLBoolean
1088 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1089 {
1090    struct dri2_egl_display *dri2_dpy;
1091
1092    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1093    if (!dri2_dpy)
1094       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1095
1096    disp->DriverData = (void *) dri2_dpy;
1097    if (disp->PlatformDisplay == NULL) {
1098       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1099       dri2_dpy->own_device = true;
1100    } else {
1101       Display *dpy = disp->PlatformDisplay;
1102
1103       dri2_dpy->conn = XGetXCBConnection(dpy);
1104       dri2_dpy->screen = DefaultScreen(dpy);
1105    }
1106
1107    if (xcb_connection_has_error(dri2_dpy->conn)) {
1108       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1109       goto cleanup_dpy;
1110    }
1111
1112    /*
1113     * Every hardware driver_name is set using strdup. Doing the same in
1114     * here will allow is to simply free the memory at dri2_terminate().
1115     */
1116    dri2_dpy->driver_name = strdup("swrast");
1117    if (!dri2_load_driver_swrast(disp))
1118       goto cleanup_conn;
1119
1120    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1121    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
1122    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1123    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1124    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1125
1126    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1127    dri2_dpy->extensions[1] = NULL;
1128    dri2_dpy->extensions[2] = NULL;
1129
1130    if (!dri2_create_screen(disp))
1131       goto cleanup_driver;
1132
1133    if (dri2_dpy->conn) {
1134       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1135          goto cleanup_configs;
1136    }
1137
1138    /* we're supporting EGL 1.4 */
1139    disp->VersionMajor = 1;
1140    disp->VersionMinor = 4;
1141
1142    /* Fill vtbl last to prevent accidentally calling virtual function during
1143     * initialization.
1144     */
1145    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1146
1147    return EGL_TRUE;
1148
1149  cleanup_configs:
1150    _eglCleanupDisplay(disp);
1151    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1152  cleanup_driver:
1153    dlclose(dri2_dpy->driver);
1154  cleanup_conn:
1155    free(dri2_dpy->driver_name);
1156    if (disp->PlatformDisplay == NULL)
1157       xcb_disconnect(dri2_dpy->conn);
1158  cleanup_dpy:
1159    free(dri2_dpy);
1160
1161    return EGL_FALSE;
1162 }
1163
1164 static void
1165 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1166 {
1167    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1168    int arbitrary_max_interval = 1000;
1169
1170    /* default behavior for no SwapBuffers support: no vblank syncing
1171     * either.
1172     */
1173    dri2_dpy->min_swap_interval = 0;
1174    dri2_dpy->max_swap_interval = 0;
1175
1176    if (!dri2_dpy->swap_available)
1177       return;
1178
1179    /* If we do have swapbuffers, then we can support pretty much any swap
1180     * interval, but we allow driconf to override applications.
1181     */
1182    if (dri2_dpy->config)
1183       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1184                                      "vblank_mode", &vblank_mode);
1185    switch (vblank_mode) {
1186    case DRI_CONF_VBLANK_NEVER:
1187       dri2_dpy->min_swap_interval = 0;
1188       dri2_dpy->max_swap_interval = 0;
1189       dri2_dpy->default_swap_interval = 0;
1190       break;
1191    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1192       dri2_dpy->min_swap_interval = 1;
1193       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1194       dri2_dpy->default_swap_interval = 1;
1195       break;
1196    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1197       dri2_dpy->min_swap_interval = 0;
1198       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1199       dri2_dpy->default_swap_interval = 0;
1200       break;
1201    default:
1202    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1203       dri2_dpy->min_swap_interval = 0;
1204       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1205       dri2_dpy->default_swap_interval = 1;
1206       break;
1207    }
1208 }
1209
1210 static EGLBoolean
1211 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1212 {
1213    struct dri2_egl_display *dri2_dpy;
1214
1215    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1216    if (!dri2_dpy)
1217       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1218
1219    disp->DriverData = (void *) dri2_dpy;
1220    if (disp->PlatformDisplay == NULL) {
1221       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1222       dri2_dpy->own_device = true;
1223    } else {
1224       Display *dpy = disp->PlatformDisplay;
1225
1226       dri2_dpy->conn = XGetXCBConnection(dpy);
1227       dri2_dpy->screen = DefaultScreen(dpy);
1228    }
1229
1230    if (xcb_connection_has_error(dri2_dpy->conn)) {
1231       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1232       goto cleanup_dpy;
1233    }
1234
1235    if (dri2_dpy->conn) {
1236       if (!dri2_x11_connect(dri2_dpy))
1237          goto cleanup_conn;
1238    }
1239
1240    if (!dri2_load_driver(disp))
1241       goto cleanup_conn;
1242
1243 #ifdef O_CLOEXEC
1244    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1245    if (dri2_dpy->fd == -1 && errno == EINVAL)
1246 #endif
1247    {
1248       dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR);
1249       if (dri2_dpy->fd != -1)
1250          fcntl(dri2_dpy->fd, F_SETFD, fcntl(dri2_dpy->fd, F_GETFD) |
1251             FD_CLOEXEC);
1252    }
1253    if (dri2_dpy->fd == -1) {
1254       _eglLog(_EGL_WARNING,
1255               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1256               strerror(errno));
1257       goto cleanup_driver;
1258    }
1259
1260    if (dri2_dpy->conn) {
1261       if (!dri2_x11_local_authenticate(disp))
1262          goto cleanup_fd;
1263    }
1264
1265    if (dri2_dpy->dri2_minor >= 1) {
1266       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1267       dri2_dpy->dri2_loader_extension.base.version = 3;
1268       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1269       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1270       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1271          dri2_x11_get_buffers_with_format;
1272    } else {
1273       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1274       dri2_dpy->dri2_loader_extension.base.version = 2;
1275       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1276       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1277       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1278    }
1279
1280    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1281    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1282    dri2_dpy->extensions[2] = NULL;
1283
1284    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1285    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1286
1287    if (!dri2_create_screen(disp))
1288       goto cleanup_fd;
1289
1290    dri2_x11_setup_swap_interval(dri2_dpy);
1291
1292    if (dri2_dpy->conn) {
1293       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1294          goto cleanup_configs;
1295    }
1296
1297    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1298    disp->Extensions.NOK_swap_region = EGL_TRUE;
1299    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1300    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1301    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1302
1303 #ifdef HAVE_WAYLAND_PLATFORM
1304    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1305 #endif
1306
1307    if (dri2_dpy->conn) {
1308       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp))
1309          goto cleanup_configs;
1310    }
1311
1312    /* we're supporting EGL 1.4 */
1313    disp->VersionMajor = 1;
1314    disp->VersionMinor = 4;
1315
1316    /* Fill vtbl last to prevent accidentally calling virtual function during
1317     * initialization.
1318     */
1319    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1320
1321    return EGL_TRUE;
1322
1323  cleanup_configs:
1324    _eglCleanupDisplay(disp);
1325    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1326  cleanup_fd:
1327    close(dri2_dpy->fd);
1328  cleanup_driver:
1329    dlclose(dri2_dpy->driver);
1330  cleanup_conn:
1331    if (disp->PlatformDisplay == NULL)
1332       xcb_disconnect(dri2_dpy->conn);
1333  cleanup_dpy:
1334    free(dri2_dpy);
1335
1336    return EGL_FALSE;
1337 }
1338
1339 EGLBoolean
1340 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1341 {
1342    EGLBoolean initialized = EGL_TRUE;
1343
1344    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1345
1346    if (x11_dri2_accel) {
1347       if (!dri2_initialize_x11_dri2(drv, disp)) {
1348          initialized = dri2_initialize_x11_swrast(drv, disp);
1349       }
1350    } else {
1351       initialized = dri2_initialize_x11_swrast(drv, disp);
1352    }
1353
1354    return initialized;
1355 }
1356