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 <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <limits.h>
  32 #include <dlfcn.h>
  33 #include <fcntl.h>
  34 #include <errno.h>
  35 #include <unistd.h>
  36 #include <xf86drm.h>
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39
  40 #include "egl_dri2.h"
  41
  42 /* From xmlpool/options.h, user exposed so should be stable */
  43 #define DRI_CONF_VBLANK_NEVER 0
  44 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  45 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  46 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  47
  48 static void
  49 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  50                      struct dri2_egl_surface * dri2_surf,
  51                      int depth)
  52 {
  53    uint32_t           mask;
  54    const uint32_t     function = GXcopy;
  55    uint32_t           valgc[2];
  56
  57    /* create GC's */
  58    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  59    mask = XCB_GC_FUNCTION;
  60    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  61
  62    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  63    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  64    valgc[0] = function;
  65    valgc[1] = False;
  66    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  67    dri2_surf->depth = depth;
  68    switch (depth) {
  69       case 32:
  70       case 24:
  71          dri2_surf->bytes_per_pixel = 4;
  72          break;
  73       case 16:
  74          dri2_surf->bytes_per_pixel = 2;
  75          break;
  76       case 8:
  77          dri2_surf->bytes_per_pixel = 1;
  78          break;
  79       case 0:
  80          dri2_surf->bytes_per_pixel = 0;
  81          break;
  82       default:
  83          _eglLog(_EGL_WARNING, "unsupported depth %d", depth);
  84    }
  85 }
  86
  87 static void
  88 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  89                       struct dri2_egl_surface * dri2_surf)
  90 {
  91    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  92    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  93 }
  94
  95 static void
  96 swrastGetDrawableInfo(__DRIdrawable * draw,
  97                       int *x, int *y, int *w, int *h,
  98                       void *loaderPrivate)
  99 {
 100    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 101    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 102
 103    xcb_get_geometry_cookie_t cookie;
 104    xcb_get_geometry_reply_t *reply;
 105    xcb_generic_error_t *error;
 106
 107    *w = *h = 0;
 108    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 109    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 110    if (reply == NULL)
 111       return;
 112
 113    if (error != NULL) {
 114       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 115       free(error);
 116    } else {
 117       *w = reply->width;
 118       *h = reply->height;
 119    }
 120    free(reply);
 121 }
 122
 123 static void
 124 swrastPutImage(__DRIdrawable * draw, int op,
 125                int x, int y, int w, int h,
 126                char *data, void *loaderPrivate)
 127 {
 128    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 129    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 130
 131    xcb_gcontext_t gc;
 132
 133    switch (op) {
 134    case __DRI_SWRAST_IMAGE_OP_DRAW:
 135       gc = dri2_surf->gc;
 136       break;
 137    case __DRI_SWRAST_IMAGE_OP_SWAP:
 138       gc = dri2_surf->swapgc;
 139       break;
 140    default:
 141       return;
 142    }
 143
 144    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 145                  gc, w, h, x, y, 0, dri2_surf->depth,
 146                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 147 }
 148
 149 static void
 150 swrastGetImage(__DRIdrawable * read,
 151                int x, int y, int w, int h,
 152                char *data, void *loaderPrivate)
 153 {
 154    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 155    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 156
 157    xcb_get_image_cookie_t cookie;
 158    xcb_get_image_reply_t *reply;
 159    xcb_generic_error_t *error;
 160
 161    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 162                            dri2_surf->drawable, x, y, w, h, ~0);
 163    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 164    if (reply == NULL)
 165       return;
 166
 167    if (error != NULL) {
 168       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 169       free(error);
 170    } else {
 171       uint32_t bytes = xcb_get_image_data_length(reply);
 172       uint8_t *idata = xcb_get_image_data(reply);
 173       memcpy(data, idata, bytes);
 174    }
 175    free(reply);
 176 }
 177
 178
 179 /**
 180  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 181  */
 182 static _EGLSurface *
 183 dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 184                     _EGLConfig *conf, EGLNativeWindowType native_window,
 185                     const EGLint *attrib_list)
 186 {
 187    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 188    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 189    struct dri2_egl_surface *dri2_surf;
 190    xcb_get_geometry_cookie_t cookie;
 191    xcb_get_geometry_reply_t *reply;
 192    xcb_screen_iterator_t s;
 193    xcb_generic_error_t *error;
 194    xcb_drawable_t window = (uintptr_t )native_window;
 195
 196    (void) drv;
 197
 198    dri2_surf = malloc(sizeof *dri2_surf);
 199    if (!dri2_surf) {
 200       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 201       return NULL;
 202    }
 203
 204    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 205       goto cleanup_surf;
 206
 207    dri2_surf->region = XCB_NONE;
 208    if (type == EGL_PBUFFER_BIT) {
 209       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 210       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 211       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 212                         dri2_surf->drawable, s.data->root,
 213                         dri2_surf->base.Width, dri2_surf->base.Height);
 214    } else {
 215       dri2_surf->drawable = window;
 216    }
 217
 218    if (dri2_dpy->dri2) {
 219       dri2_surf->dri_drawable =
 220          (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 221                                                type == EGL_WINDOW_BIT ?
 222                                                dri2_conf->dri_double_config :
 223                                                dri2_conf->dri_single_config,
 224                                                dri2_surf);
 225    } else {
 226       assert(dri2_dpy->swrast);
 227       dri2_surf->dri_drawable =
 228          (*dri2_dpy->swrast->createNewDrawable) (dri2_dpy->dri_screen,
 229                                                  dri2_conf->dri_double_config,
 230                                                  dri2_surf);
 231    }
 232
 233    if (dri2_surf->dri_drawable == NULL) {
 234       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 235       goto cleanup_pixmap;
 236    }
 237
 238    if (dri2_dpy->dri2) {
 239       xcb_dri2_create_drawable (dri2_dpy->conn, dri2_surf->drawable);
 240    } else {
 241       swrastCreateDrawable(dri2_dpy, dri2_surf, _eglGetConfigKey(conf, EGL_BUFFER_SIZE));
 242    }
 243
 244    if (type != EGL_PBUFFER_BIT) {
 245       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 246       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 247       if (reply == NULL || error != NULL) {
 248          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 249          free(error);
 250          goto cleanup_dri_drawable;
 251       }
 252
 253       dri2_surf->base.Width = reply->width;
 254       dri2_surf->base.Height = reply->height;
 255       free(reply);
 256    }
 257
 258    /* we always copy the back buffer to front */
 259    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 260
 261    return &dri2_surf->base;
 262
 263  cleanup_dri_drawable:
 264    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 265  cleanup_pixmap:
 266    if (type == EGL_PBUFFER_BIT)
 267       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 268  cleanup_surf:
 269    free(dri2_surf);
 270
 271    return NULL;
 272 }
 273
 274 /**
 275  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 276  */
 277 static _EGLSurface *
 278 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 279                            _EGLConfig *conf, EGLNativeWindowType window,
 280                            const EGLint *attrib_list)
 281 {
 282    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 283    _EGLSurface *surf;
 284
 285    surf = dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 286                               window, attrib_list);
 287    if (surf != NULL) {
 288       /* When we first create the DRI2 drawable, its swap interval on the
 289        * server side is 1.
 290        */
 291       surf->SwapInterval = 1;
 292
 293       /* Override that with a driconf-set value. */
 294       drv->API.SwapInterval(drv, disp, surf, dri2_dpy->default_swap_interval);
 295    }
 296
 297    return surf;
 298 }
 299
 300 static _EGLSurface *
 301 dri2_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 302                            _EGLConfig *conf, EGLNativePixmapType pixmap,
 303                            const EGLint *attrib_list)
 304 {
 305    return dri2_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 306                               pixmap, attrib_list);
 307 }
 308
 309 static _EGLSurface *
 310 dri2_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 311                             _EGLConfig *conf, const EGLint *attrib_list)
 312 {
 313    return dri2_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 314                               XCB_WINDOW_NONE, attrib_list);
 315 }
 316
 317 static EGLBoolean
 318 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 319 {
 320    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 321    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 322
 323    (void) drv;
 324
 325    if (!_eglPutSurface(surf))
 326       return EGL_TRUE;
 327
 328    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 329
 330    if (dri2_dpy->dri2) {
 331       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 332    } else {
 333       assert(dri2_dpy->swrast);
 334       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 335    }
 336
 337    if (surf->Type == EGL_PBUFFER_BIT)
 338       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 339
 340    free(surf);
 341
 342    return EGL_TRUE;
 343 }
 344
 345 /**
 346  * Process list of buffer received from the server
 347  *
 348  * Processes the list of buffers received in a reply from the server to either
 349  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 350  */
 351 static void
 352 dri2_process_buffers(struct dri2_egl_surface *dri2_surf,
 353                      xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 354 {
 355    struct dri2_egl_display *dri2_dpy =
 356       dri2_egl_display(dri2_surf->base.Resource.Display);
 357    xcb_rectangle_t rectangle;
 358    unsigned i;
 359
 360    dri2_surf->buffer_count = count;
 361    dri2_surf->have_fake_front = 0;
 362
 363    /* This assumes the DRI2 buffer attachment tokens matches the
 364     * __DRIbuffer tokens. */
 365    for (i = 0; i < count; i++) {
 366       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 367       dri2_surf->buffers[i].name = buffers[i].name;
 368       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 369       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 370       dri2_surf->buffers[i].flags = buffers[i].flags;
 371
 372       /* We only use the DRI drivers single buffer configs.  This
 373        * means that if we try to render to a window, DRI2 will give us
 374        * the fake front buffer, which we'll use as a back buffer.
 375        * Note that EGL doesn't require that several clients rendering
 376        * to the same window must see the same aux buffers. */
 377       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 378          dri2_surf->have_fake_front = 1;
 379    }
 380
 381    if (dri2_surf->region != XCB_NONE)
 382       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 383
 384    rectangle.x = 0;
 385    rectangle.y = 0;
 386    rectangle.width = dri2_surf->base.Width;
 387    rectangle.height = dri2_surf->base.Height;
 388    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 389    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 390 }
 391
 392 static __DRIbuffer *
 393 dri2_get_buffers(__DRIdrawable * driDrawable,
 394                 int *width, int *height,
 395                 unsigned int *attachments, int count,
 396                 int *out_count, void *loaderPrivate)
 397 {
 398    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 399    struct dri2_egl_display *dri2_dpy =
 400       dri2_egl_display(dri2_surf->base.Resource.Display);
 401    xcb_dri2_dri2_buffer_t *buffers;
 402    xcb_dri2_get_buffers_reply_t *reply;
 403    xcb_dri2_get_buffers_cookie_t cookie;
 404
 405    (void) driDrawable;
 406
 407    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 408                                             dri2_surf->drawable,
 409                                             count, count, attachments);
 410    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 411    buffers = xcb_dri2_get_buffers_buffers (reply);
 412    if (buffers == NULL)
 413       return NULL;
 414
 415    *out_count = reply->count;
 416    dri2_surf->base.Width = *width = reply->width;
 417    dri2_surf->base.Height = *height = reply->height;
 418    dri2_process_buffers(dri2_surf, buffers, *out_count);
 419
 420    free(reply);
 421
 422    return dri2_surf->buffers;
 423 }
 424
 425 static __DRIbuffer *
 426 dri2_get_buffers_with_format(__DRIdrawable * driDrawable,
 427                              int *width, int *height,
 428                              unsigned int *attachments, int count,
 429                              int *out_count, void *loaderPrivate)
 430 {
 431    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 432    struct dri2_egl_display *dri2_dpy =
 433       dri2_egl_display(dri2_surf->base.Resource.Display);
 434    xcb_dri2_dri2_buffer_t *buffers;
 435    xcb_dri2_get_buffers_with_format_reply_t *reply;
 436    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 437    xcb_dri2_attach_format_t *format_attachments;
 438
 439    (void) driDrawable;
 440
 441    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 442    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 443                                                         dri2_surf->drawable,
 444                                                         count, count,
 445                                                         format_attachments);
 446
 447    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 448                                                    cookie, NULL);
 449    if (reply == NULL)
 450       return NULL;
 451
 452    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 453    dri2_surf->base.Width = *width = reply->width;
 454    dri2_surf->base.Height = *height = reply->height;
 455    *out_count = reply->count;
 456    dri2_process_buffers(dri2_surf, buffers, *out_count);
 457
 458    free(reply);
 459
 460    return dri2_surf->buffers;
 461 }
 462
 463 static void
 464 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 465 {
 466    (void) driDrawable;
 467
 468    /* FIXME: Does EGL support front buffer rendering at all? */
 469
 470 #if 0
 471    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 472
 473    dri2WaitGL(dri2_surf);
 474 #else
 475    (void) loaderPrivate;
 476 #endif
 477 }
 478
 479 static char *
 480 dri2_strndup(const char *s, int length)
 481 {
 482    char *d;
 483
 484    d = malloc(length + 1);
 485    if (d == NULL)
 486       return NULL;
 487
 488    memcpy(d, s, length);
 489    d[length] = '\0';
 490
 491    return d;
 492 }
 493
 494 static EGLBoolean
 495 dri2_connect(struct dri2_egl_display *dri2_dpy)
 496 {
 497    xcb_xfixes_query_version_reply_t *xfixes_query;
 498    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 499    xcb_dri2_query_version_reply_t *dri2_query;
 500    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 501    xcb_dri2_connect_reply_t *connect;
 502    xcb_dri2_connect_cookie_t connect_cookie;
 503    xcb_generic_error_t *error;
 504    xcb_screen_iterator_t s;
 505    char *driver_name, *device_name;
 506    const xcb_query_extension_reply_t *extension;
 507
 508    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 509    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 510
 511    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 512    if (!(extension && extension->present))
 513       return EGL_FALSE;
 514
 515    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 516    if (!(extension && extension->present))
 517       return EGL_FALSE;
 518
 519    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 520                                                   XCB_XFIXES_MAJOR_VERSION,
 521                                                   XCB_XFIXES_MINOR_VERSION);
 522
 523    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 524                                                XCB_DRI2_MAJOR_VERSION,
 525                                                XCB_DRI2_MINOR_VERSION);
 526
 527    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 528    connect_cookie = xcb_dri2_connect_unchecked (dri2_dpy->conn,
 529                                                 s.data->root,
 530                                                 XCB_DRI2_DRIVER_TYPE_DRI);
 531
 532    xfixes_query =
 533       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 534                                       xfixes_query_cookie, &error);
 535    if (xfixes_query == NULL ||
 536        error != NULL || xfixes_query->major_version < 2) {
 537       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 538       free(error);
 539       return EGL_FALSE;
 540    }
 541    free(xfixes_query);
 542
 543    dri2_query =
 544       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 545    if (dri2_query == NULL || error != NULL) {
 546       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 547       free(error);
 548       return EGL_FALSE;
 549    }
 550    dri2_dpy->dri2_major = dri2_query->major_version;
 551    dri2_dpy->dri2_minor = dri2_query->minor_version;
 552    free(dri2_query);
 553
 554    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 555    if (connect == NULL ||
 556        connect->driver_name_length + connect->device_name_length == 0) {
 557       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 558       return EGL_FALSE;
 559    }
 560
 561    driver_name = xcb_dri2_connect_driver_name (connect);
 562    dri2_dpy->driver_name =
 563       dri2_strndup(driver_name,
 564                    xcb_dri2_connect_driver_name_length (connect));
 565
 566    device_name = xcb_dri2_connect_device_name (connect);
 567
 568    dri2_dpy->device_name =
 569       dri2_strndup(device_name,
 570                    xcb_dri2_connect_device_name_length (connect));
 571
 572    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 573       free(dri2_dpy->device_name);
 574       free(dri2_dpy->driver_name);
 575       free(connect);
 576       return EGL_FALSE;
 577    }
 578    free(connect);
 579
 580    return EGL_TRUE;
 581 }
 582
 583 static int
 584 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 585 {
 586    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 587    xcb_dri2_authenticate_reply_t *authenticate;
 588    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 589    xcb_screen_iterator_t s;
 590    int ret = 0;
 591
 592    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 593    authenticate_cookie =
 594       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, s.data->root, id);
 595    authenticate =
 596       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 597
 598    if (authenticate == NULL || !authenticate->authenticated)
 599       ret = -1;
 600
 601    free(authenticate);
 602
 603    return ret;
 604 }
 605
 606 static EGLBoolean
 607 dri2_authenticate(_EGLDisplay *disp)
 608 {
 609    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 610    drm_magic_t magic;
 611
 612    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 613       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 614       return EGL_FALSE;
 615    }
 616
 617    if (dri2_x11_authenticate(disp, magic) < 0) {
 618       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 619       return EGL_FALSE;
 620    }
 621
 622    return EGL_TRUE;
 623 }
 624
 625 static EGLBoolean
 626 dri2_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 627                              _EGLDisplay *disp)
 628 {
 629    xcb_screen_iterator_t s;
 630    xcb_depth_iterator_t d;
 631    xcb_visualtype_t *visuals;
 632    int i, j, id;
 633    unsigned int rgba_masks[4];
 634    EGLint surface_type;
 635    EGLint config_attrs[] = {
 636            EGL_NATIVE_VISUAL_ID,   0,
 637            EGL_NATIVE_VISUAL_TYPE, 0,
 638            EGL_NONE
 639    };
 640
 641    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 642    d = xcb_screen_allowed_depths_iterator(s.data);
 643    id = 1;
 644
 645    surface_type =
 646       EGL_WINDOW_BIT |
 647       EGL_PIXMAP_BIT |
 648       EGL_PBUFFER_BIT |
 649       EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 650
 651    while (d.rem > 0) {
 652       EGLBoolean class_added[6] = { 0, };
 653
 654       visuals = xcb_depth_visuals(d.data);
 655       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 656          if (class_added[visuals[i]._class])
 657             continue;
 658
 659          class_added[visuals[i]._class] = EGL_TRUE;
 660          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 661             config_attrs[1] = visuals[i].visual_id;
 662             config_attrs[3] = visuals[i]._class;
 663
 664             rgba_masks[0] = visuals[i].red_mask;
 665             rgba_masks[1] = visuals[i].green_mask;
 666             rgba_masks[2] = visuals[i].blue_mask;
 667             rgba_masks[3] = 0;
 668             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 669                             surface_type, config_attrs, rgba_masks);
 670
 671             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 672              * Otherwise it will only match a 32-bit RGBA visual.  On a
 673              * composited window manager on X11, this will make all of the
 674              * EGLConfigs with destination alpha get blended by the
 675              * compositor.  This is probably not what the application
 676              * wants... especially on drivers that only have 32-bit RGBA
 677              * EGLConfigs! */
 678             if (d.data->depth == 24) {
 679                rgba_masks[3] =
 680                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 681                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 682                                surface_type, config_attrs, rgba_masks);
 683             }
 684          }
 685       }
 686
 687       xcb_depth_next(&d);
 688    }
 689
 690    if (!_eglGetArraySize(disp->Configs)) {
 691       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 692       return EGL_FALSE;
 693    }
 694
 695    return EGL_TRUE;
 696 }
 697
 698 static EGLBoolean
 699 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 700                  _EGLSurface *draw, xcb_xfixes_region_t region)
 701 {
 702    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 703    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 704    enum xcb_dri2_attachment_t render_attachment;
 705    xcb_dri2_copy_region_cookie_t cookie;
 706
 707    /* No-op for a pixmap or pbuffer surface */
 708    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 709       return EGL_TRUE;
 710
 711    if (dri2_dpy->flush)
 712       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 713
 714    if (dri2_surf->have_fake_front)
 715       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 716    else
 717       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 718
 719    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 720                                            dri2_surf->drawable,
 721                                            region,
 722                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 723                                            render_attachment);
 724    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 725
 726    return EGL_TRUE;
 727 }
 728
 729 static int64_t
 730 dri2_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 731                       int64_t msc, int64_t divisor, int64_t remainder)
 732 {
 733    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 734    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 735    uint32_t msc_hi = msc >> 32;
 736    uint32_t msc_lo = msc & 0xffffffff;
 737    uint32_t divisor_hi = divisor >> 32;
 738    uint32_t divisor_lo = divisor & 0xffffffff;
 739    uint32_t remainder_hi = remainder >> 32;
 740    uint32_t remainder_lo = remainder & 0xffffffff;
 741    xcb_dri2_swap_buffers_cookie_t cookie;
 742    xcb_dri2_swap_buffers_reply_t *reply;
 743    int64_t swap_count = -1;
 744
 745    /* No-op for a pixmap or pbuffer surface */
 746    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 747       return 0;
 748
 749    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 750       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 751
 752    if (dri2_dpy->flush)
 753       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 754
 755    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 756                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 757
 758    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 759
 760    if (reply) {
 761       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 762       free(reply);
 763    }
 764
 765    /* Since we aren't watching for the server's invalidate events like we're
 766     * supposed to (due to XCB providing no mechanism for filtering the events
 767     * the way xlib does), and SwapBuffers is a common cause of invalidate
 768     * events, just shove one down to the driver, even though we haven't told
 769     * the driver that we're the kind of loader that provides reliable
 770     * invalidate events.  This causes the driver to request buffers again at
 771     * its next draw, so that we get the correct buffers if a pageflip
 772     * happened.  The driver should still be using the viewport hack to catch
 773     * window resizes.
 774     */
 775    if (dri2_dpy->flush &&
 776        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 777       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 778
 779    return swap_count;
 780 }
 781
 782 static EGLBoolean
 783 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 784 {
 785    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 786    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 787
 788    if (dri2_dpy->dri2) {
 789       return dri2_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 790    } else {
 791       assert(dri2_dpy->swrast);
 792
 793       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 794       return EGL_TRUE;
 795    }
 796 }
 797
 798 static EGLBoolean
 799 dri2_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 800                          EGLint numRects, const EGLint *rects)
 801 {
 802    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 803    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 804    EGLBoolean ret;
 805    xcb_xfixes_region_t region;
 806    xcb_rectangle_t rectangles[16];
 807    int i;
 808
 809    if (numRects > (int)ARRAY_SIZE(rectangles))
 810       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 811
 812    for (i = 0; i < numRects; i++) {
 813       rectangles[i].x = rects[i * 4];
 814       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 815       rectangles[i].width = rects[i * 4 + 2];
 816       rectangles[i].height = rects[i * 4 + 3];
 817    }
 818
 819    region = xcb_generate_id(dri2_dpy->conn);
 820    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 821    ret = dri2_copy_region(drv, disp, draw, region);
 822    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 823
 824    return ret;
 825 }
 826
 827 static EGLBoolean
 828 dri2_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 829                      EGLint x, EGLint y, EGLint width, EGLint height)
 830 {
 831    const EGLint rect[4] = { x, y, width, height };
 832
 833    if (x < 0 || y < 0 || width < 0 || height < 0)
 834       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 835
 836    return dri2_swap_buffers_region(drv, disp, draw, 1, rect);
 837 }
 838
 839 static EGLBoolean
 840 dri2_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf, EGLint interval)
 841 {
 842    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 843    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 844
 845    if (interval > surf->Config->MaxSwapInterval)
 846       interval = surf->Config->MaxSwapInterval;
 847    else if (interval < surf->Config->MinSwapInterval)
 848       interval = surf->Config->MinSwapInterval;
 849
 850    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 851       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 852
 853    surf->SwapInterval = interval;
 854
 855    return EGL_TRUE;
 856 }
 857
 858 static EGLBoolean
 859 dri2_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 860                   EGLNativePixmapType native_target)
 861 {
 862    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 863    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 864    xcb_gcontext_t gc;
 865    xcb_pixmap_t target = (uintptr_t )native_target;
 866
 867    (void) drv;
 868
 869    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 870
 871    gc = xcb_generate_id(dri2_dpy->conn);
 872    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 873    xcb_copy_area(dri2_dpy->conn,
 874                   dri2_surf->drawable,
 875                   target,
 876                   gc,
 877                   0, 0,
 878                   0, 0,
 879                   dri2_surf->base.Width,
 880                   dri2_surf->base.Height);
 881    xcb_free_gc(dri2_dpy->conn, gc);
 882
 883    return EGL_TRUE;
 884 }
 885
 886 static _EGLImage *
 887 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 888                              EGLClientBuffer buffer, const EGLint *attr_list)
 889 {
 890    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 891    struct dri2_egl_image *dri2_img;
 892    unsigned int attachments[1];
 893    xcb_drawable_t drawable;
 894    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 895    xcb_dri2_get_buffers_reply_t *buffers_reply;
 896    xcb_dri2_dri2_buffer_t *buffers;
 897    xcb_get_geometry_cookie_t geometry_cookie;
 898    xcb_get_geometry_reply_t *geometry_reply;
 899    xcb_generic_error_t *error;
 900    int stride, format;
 901
 902    (void) ctx;
 903
 904    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 905    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 906    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 907    buffers_cookie =
 908       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 909                                       drawable, 1, 1, attachments);
 910    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 911    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 912                                                buffers_cookie, NULL);
 913    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
 914    if (buffers == NULL) {
 915       return NULL;
 916    }
 917
 918    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
 919                                             geometry_cookie, &error);
 920    if (geometry_reply == NULL || error != NULL) {
 921       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 922       free(error);
 923       free(buffers_reply);
 924       return NULL;
 925    }
 926
 927    switch (geometry_reply->depth) {
 928    case 16:
 929       format = __DRI_IMAGE_FORMAT_RGB565;
 930       break;
 931    case 24:
 932       format = __DRI_IMAGE_FORMAT_XRGB8888;
 933       break;
 934    case 32:
 935       format = __DRI_IMAGE_FORMAT_ARGB8888;
 936       break;
 937    default:
 938       _eglError(EGL_BAD_PARAMETER,
 939                 "dri2_create_image_khr: unsupported pixmap depth");
 940       free(buffers_reply);
 941       free(geometry_reply);
 942       return NULL;
 943    }
 944
 945    dri2_img = malloc(sizeof *dri2_img);
 946    if (!dri2_img) {
 947       free(buffers_reply);
 948       free(geometry_reply);
 949       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
 950       return EGL_NO_IMAGE_KHR;
 951    }
 952
 953    if (!_eglInitImage(&dri2_img->base, disp)) {
 954       free(buffers_reply);
 955       free(geometry_reply);
 956       free(dri2_img);
 957       return EGL_NO_IMAGE_KHR;
 958    }
 959
 960    stride = buffers[0].pitch / buffers[0].cpp;
 961    dri2_img->dri_image =
 962       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
 963                                            buffers_reply->width,
 964                                            buffers_reply->height,
 965                                            format,
 966                                            buffers[0].name,
 967                                            stride,
 968                                            dri2_img);
 969
 970    free(buffers_reply);
 971    free(geometry_reply);
 972
 973    return &dri2_img->base;
 974 }
 975
 976 static _EGLImage *
 977 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 978                           _EGLContext *ctx, EGLenum target,
 979                           EGLClientBuffer buffer, const EGLint *attr_list)
 980 {
 981    (void) drv;
 982
 983    switch (target) {
 984    case EGL_NATIVE_PIXMAP_KHR:
 985       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 986    default:
 987       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 988    }
 989 }
 990
 991 static EGLBoolean
 992 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
 993 {
 994    struct dri2_egl_display *dri2_dpy;
 995
 996    drv->API.CreateWindowSurface = dri2_create_window_surface;
 997    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
 998    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
 999    drv->API.DestroySurface = dri2_destroy_surface;
1000    drv->API.SwapBuffers = dri2_swap_buffers;
1001    drv->API.CopyBuffers = dri2_copy_buffers;
1002
1003    drv->API.SwapBuffersRegionNOK = NULL;
1004    drv->API.CreateImageKHR  = NULL;
1005    drv->API.DestroyImageKHR = NULL;
1006    drv->API.CreateDRMImageMESA = NULL;
1007    drv->API.ExportDRMImageMESA = NULL;
1008
1009    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1010    if (!dri2_dpy)
1011       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1012
1013    disp->DriverData = (void *) dri2_dpy;
1014    if (disp->PlatformDisplay == NULL) {
1015       dri2_dpy->conn = xcb_connect(0, 0);
1016    } else {
1017       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1018    }
1019
1020    if (xcb_connection_has_error(dri2_dpy->conn)) {
1021       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1022       goto cleanup_dpy;
1023    }
1024
1025    if (!dri2_load_driver_swrast(disp))
1026       goto cleanup_conn;
1027
1028    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1029    dri2_dpy->swrast_loader_extension.base.version = __DRI_SWRAST_LOADER_VERSION;
1030    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1031    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1032    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1033
1034    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1035    dri2_dpy->extensions[1] = NULL;
1036    dri2_dpy->extensions[2] = NULL;
1037
1038    if (!dri2_create_screen(disp))
1039       goto cleanup_driver;
1040
1041    if (dri2_dpy->conn) {
1042       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
1043          goto cleanup_configs;
1044    }
1045
1046    /* we're supporting EGL 1.4 */
1047    disp->VersionMajor = 1;
1048    disp->VersionMinor = 4;
1049
1050    return EGL_TRUE;
1051
1052  cleanup_configs:
1053    _eglCleanupDisplay(disp);
1054    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1055  cleanup_driver:
1056    dlclose(dri2_dpy->driver);
1057  cleanup_conn:
1058    if (disp->PlatformDisplay == NULL)
1059       xcb_disconnect(dri2_dpy->conn);
1060  cleanup_dpy:
1061    free(dri2_dpy);
1062
1063    return EGL_FALSE;
1064 }
1065
1066 static void
1067 dri2_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1068 {
1069    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1070    int arbitrary_max_interval = 1000;
1071
1072    /* default behavior for no SwapBuffers support: no vblank syncing
1073     * either.
1074     */
1075    dri2_dpy->min_swap_interval = 0;
1076    dri2_dpy->max_swap_interval = 0;
1077
1078    if (!dri2_dpy->swap_available)
1079       return;
1080
1081    /* If we do have swapbuffers, then we can support pretty much any swap
1082     * interval, but we allow driconf to override applications.
1083     */
1084    if (dri2_dpy->config)
1085       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1086                                      "vblank_mode", &vblank_mode);
1087    switch (vblank_mode) {
1088    case DRI_CONF_VBLANK_NEVER:
1089       dri2_dpy->min_swap_interval = 0;
1090       dri2_dpy->max_swap_interval = 0;
1091       dri2_dpy->default_swap_interval = 0;
1092       break;
1093    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1094       dri2_dpy->min_swap_interval = 1;
1095       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1096       dri2_dpy->default_swap_interval = 1;
1097       break;
1098    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1099       dri2_dpy->min_swap_interval = 0;
1100       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1101       dri2_dpy->default_swap_interval = 0;
1102       break;
1103    default:
1104    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1105       dri2_dpy->min_swap_interval = 0;
1106       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1107       dri2_dpy->default_swap_interval = 1;
1108       break;
1109    }
1110 }
1111
1112 static EGLBoolean
1113 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1114 {
1115    struct dri2_egl_display *dri2_dpy;
1116
1117    drv->API.CreateWindowSurface = dri2_create_window_surface;
1118    drv->API.CreatePixmapSurface = dri2_create_pixmap_surface;
1119    drv->API.CreatePbufferSurface = dri2_create_pbuffer_surface;
1120    drv->API.DestroySurface = dri2_destroy_surface;
1121    drv->API.SwapBuffers = dri2_swap_buffers;
1122    drv->API.CopyBuffers = dri2_copy_buffers;
1123    drv->API.CreateImageKHR = dri2_x11_create_image_khr;
1124    drv->API.SwapBuffersRegionNOK = dri2_swap_buffers_region;
1125    drv->API.PostSubBufferNV = dri2_post_sub_buffer;
1126    drv->API.SwapInterval = dri2_swap_interval;
1127
1128    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1129    if (!dri2_dpy)
1130       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1131
1132    disp->DriverData = (void *) dri2_dpy;
1133    if (disp->PlatformDisplay == NULL) {
1134       dri2_dpy->conn = xcb_connect(0, 0);
1135    } else {
1136       dri2_dpy->conn = XGetXCBConnection((Display *) disp->PlatformDisplay);
1137    }
1138
1139    if (xcb_connection_has_error(dri2_dpy->conn)) {
1140       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1141       goto cleanup_dpy;
1142    }
1143
1144    if (dri2_dpy->conn) {
1145       if (!dri2_connect(dri2_dpy))
1146          goto cleanup_conn;
1147    }
1148
1149    if (!dri2_load_driver(disp))
1150       goto cleanup_conn;
1151
1152 #ifdef O_CLOEXEC
1153    dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR | O_CLOEXEC);
1154    if (dri2_dpy->fd == -1 && errno == EINVAL)
1155 #endif
1156    {
1157       dri2_dpy->fd = open(dri2_dpy->device_name, O_RDWR);
1158       if (dri2_dpy->fd != -1)
1159          fcntl(dri2_dpy->fd, F_SETFD, fcntl(dri2_dpy->fd, F_GETFD) |
1160             FD_CLOEXEC);
1161    }
1162    if (dri2_dpy->fd == -1) {
1163       _eglLog(_EGL_WARNING,
1164               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
1165               strerror(errno));
1166       goto cleanup_driver;
1167    }
1168
1169    if (dri2_dpy->conn) {
1170       if (!dri2_authenticate(disp))
1171          goto cleanup_fd;
1172    }
1173
1174    if (dri2_dpy->dri2_minor >= 1) {
1175       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1176       dri2_dpy->dri2_loader_extension.base.version = 3;
1177       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1178       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1179       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1180          dri2_get_buffers_with_format;
1181    } else {
1182       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1183       dri2_dpy->dri2_loader_extension.base.version = 2;
1184       dri2_dpy->dri2_loader_extension.getBuffers = dri2_get_buffers;
1185       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_flush_front_buffer;
1186       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1187    }
1188
1189    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1190    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1191    dri2_dpy->extensions[2] = NULL;
1192
1193    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1194    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1195
1196    if (!dri2_create_screen(disp))
1197       goto cleanup_fd;
1198
1199    dri2_setup_swap_interval(dri2_dpy);
1200
1201    if (dri2_dpy->conn) {
1202       if (!dri2_add_configs_for_visuals(dri2_dpy, disp))
1203          goto cleanup_configs;
1204    }
1205
1206    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1207    disp->Extensions.NOK_swap_region = EGL_TRUE;
1208    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1209    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1210
1211 #ifdef HAVE_WAYLAND_PLATFORM
1212    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1213 #endif
1214    dri2_dpy->authenticate = dri2_x11_authenticate;
1215
1216    /* we're supporting EGL 1.4 */
1217    disp->VersionMajor = 1;
1218    disp->VersionMinor = 4;
1219
1220    return EGL_TRUE;
1221
1222  cleanup_configs:
1223    _eglCleanupDisplay(disp);
1224    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1225  cleanup_fd:
1226    close(dri2_dpy->fd);
1227  cleanup_driver:
1228    dlclose(dri2_dpy->driver);
1229  cleanup_conn:
1230    if (disp->PlatformDisplay == NULL)
1231       xcb_disconnect(dri2_dpy->conn);
1232  cleanup_dpy:
1233    free(dri2_dpy);
1234
1235    return EGL_FALSE;
1236 }
1237
1238 EGLBoolean
1239 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1240 {
1241    EGLBoolean initialized = EGL_TRUE;
1242
1243    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1244
1245    if (x11_dri2_accel) {
1246       if (!dri2_initialize_x11_dri2(drv, disp)) {
1247          initialized = dri2_initialize_x11_swrast(drv, disp);
1248       }
1249    } else {
1250       initialized = dri2_initialize_x11_swrast(drv, disp);
1251    }
1252
1253    return initialized;
1254 }
1255