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