src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/macros.h"
  44
  45 #include "egl_dri2.h"
  46 #include "egl_dri2_fallbacks.h"
  47 #include "loader.h"
  48
  49 #ifdef HAVE_DRI3
  50 #include "platform_x11_dri3.h"
  51 #endif
  52
  53 static EGLBoolean
  54 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  55                        EGLint interval);
  56
  57 static void
  58 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  59                      struct dri2_egl_surface * dri2_surf)
  60 {
  61    uint32_t           mask;
  62    const uint32_t     function = GXcopy;
  63    uint32_t           valgc[2];
  64
  65    /* create GC's */
  66    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  67    mask = XCB_GC_FUNCTION;
  68    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  69
  70    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  72    valgc[0] = function;
  73    valgc[1] = False;
  74    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  75    switch (dri2_surf->depth) {
  76       case 32:
  77       case 24:
  78          dri2_surf->bytes_per_pixel = 4;
  79          break;
  80       case 16:
  81          dri2_surf->bytes_per_pixel = 2;
  82          break;
  83       case 8:
  84          dri2_surf->bytes_per_pixel = 1;
  85          break;
  86       case 0:
  87          dri2_surf->bytes_per_pixel = 0;
  88          break;
  89       default:
  90          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  91    }
  92 }
  93
  94 static void
  95 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  96                       struct dri2_egl_surface * dri2_surf)
  97 {
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  99    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 100 }
 101
 102 static bool
 103 x11_get_drawable_info(__DRIdrawable * draw,
 104                       int *x, int *y, int *w, int *h,
 105                       void *loaderPrivate)
 106 {
 107    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 108    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 109
 110    xcb_get_geometry_cookie_t cookie;
 111    xcb_get_geometry_reply_t *reply;
 112    xcb_generic_error_t *error;
 113    bool ret;
 114
 115    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 116    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 117    if (reply == NULL)
 118       return false;
 119
 120    if (error != NULL) {
 121       ret = false;
 122       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 123       free(error);
 124    } else {
 125       *x = reply->x;
 126       *y = reply->y;
 127       *w = reply->width;
 128       *h = reply->height;
 129       ret = true;
 130    }
 131    free(reply);
 132    return ret;
 133 }
 134
 135 static void
 136 swrastGetDrawableInfo(__DRIdrawable * draw,
 137                       int *x, int *y, int *w, int *h,
 138                       void *loaderPrivate)
 139 {
 140    *x = *y = *w = *h = 0;
 141    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 142 }
 143
 144 static void
 145 swrastPutImage(__DRIdrawable * draw, int op,
 146                int x, int y, int w, int h,
 147                char *data, void *loaderPrivate)
 148 {
 149    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 150    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 151
 152    xcb_gcontext_t gc;
 153
 154    switch (op) {
 155    case __DRI_SWRAST_IMAGE_OP_DRAW:
 156       gc = dri2_surf->gc;
 157       break;
 158    case __DRI_SWRAST_IMAGE_OP_SWAP:
 159       gc = dri2_surf->swapgc;
 160       break;
 161    default:
 162       return;
 163    }
 164
 165    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 166                  gc, w, h, x, y, 0, dri2_surf->depth,
 167                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 168 }
 169
 170 static void
 171 swrastGetImage(__DRIdrawable * read,
 172                int x, int y, int w, int h,
 173                char *data, void *loaderPrivate)
 174 {
 175    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 176    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 177
 178    xcb_get_image_cookie_t cookie;
 179    xcb_get_image_reply_t *reply;
 180    xcb_generic_error_t *error;
 181
 182    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 183                            dri2_surf->drawable, x, y, w, h, ~0);
 184    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 185    if (reply == NULL)
 186       return;
 187
 188    if (error != NULL) {
 189       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 190       free(error);
 191    } else {
 192       uint32_t bytes = xcb_get_image_data_length(reply);
 193       uint8_t *idata = xcb_get_image_data(reply);
 194       memcpy(data, idata, bytes);
 195    }
 196    free(reply);
 197 }
 198
 199
 200 static xcb_screen_t *
 201 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 202 {
 203     for (; iter.rem; --screen, xcb_screen_next(&iter))
 204         if (screen == 0)
 205             return iter.data;
 206
 207     return NULL;
 208 }
 209
 210
 211 /**
 212  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 213  */
 214 static _EGLSurface *
 215 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 216                         _EGLConfig *conf, void *native_surface,
 217                         const EGLint *attrib_list)
 218 {
 219    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 220    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 221    struct dri2_egl_surface *dri2_surf;
 222    xcb_get_geometry_cookie_t cookie;
 223    xcb_get_geometry_reply_t *reply;
 224    xcb_generic_error_t *error;
 225    xcb_drawable_t drawable;
 226    const __DRIconfig *config;
 227
 228    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 229    drawable = (uintptr_t) native_surface;
 230
 231    (void) drv;
 232
 233    dri2_surf = malloc(sizeof *dri2_surf);
 234    if (!dri2_surf) {
 235       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 236       return NULL;
 237    }
 238
 239    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 240       goto cleanup_surf;
 241
 242    dri2_surf->region = XCB_NONE;
 243    if (type == EGL_PBUFFER_BIT) {
 244       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 245       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 246                        dri2_surf->drawable, dri2_dpy->screen->root,
 247                         dri2_surf->base.Width, dri2_surf->base.Height);
 248    } else {
 249       if (!drawable) {
 250          assert(type == EGL_PIXMAP_BIT)
 251          _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 252          goto cleanup_surf;
 253       }
 254       dri2_surf->drawable = drawable;
 255    }
 256
 257    config = dri2_get_dri_config(dri2_conf, type,
 258                                 dri2_surf->base.GLColorspace);
 259
 260    if (dri2_dpy->dri2) {
 261       dri2_surf->dri_drawable =
 262          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 263                                            dri2_surf);
 264    } else {
 265       assert(dri2_dpy->swrast);
 266       dri2_surf->dri_drawable =
 267          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 268                                              dri2_surf);
 269    }
 270
 271    if (dri2_surf->dri_drawable == NULL) {
 272       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 273       goto cleanup_pixmap;
 274    }
 275
 276    if (type != EGL_PBUFFER_BIT) {
 277       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 278       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 279       if (error != NULL) {
 280          if (error->error_code == BadAlloc)
 281             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 282          else if (type == EGL_WINDOW_BIT)
 283             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 284          else
 285             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 286          free(error);
 287          goto cleanup_dri_drawable;
 288       } else if (reply == NULL) {
 289          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 290          goto cleanup_dri_drawable;
 291       }
 292
 293       dri2_surf->base.Width = reply->width;
 294       dri2_surf->base.Height = reply->height;
 295       dri2_surf->depth = reply->depth;
 296       free(reply);
 297    }
 298
 299    if (dri2_dpy->dri2) {
 300       xcb_void_cookie_t cookie;
 301       int conn_error;
 302
 303       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 304                                                 dri2_surf->drawable);
 305       error = xcb_request_check(dri2_dpy->conn, cookie);
 306       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 307       if (conn_error || error != NULL) {
 308          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 309             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 310          else if (type == EGL_WINDOW_BIT)
 311             _eglError(EGL_BAD_NATIVE_WINDOW,
 312                       "xcb_dri2_create_drawable_checked");
 313          else
 314             _eglError(EGL_BAD_NATIVE_PIXMAP,
 315                       "xcb_dri2_create_drawable_checked");
 316          free(error);
 317          goto cleanup_dri_drawable;
 318       }
 319    } else {
 320       if (type == EGL_PBUFFER_BIT) {
 321          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 322       }
 323       swrastCreateDrawable(dri2_dpy, dri2_surf);
 324    }
 325
 326    /* we always copy the back buffer to front */
 327    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 328
 329    return &dri2_surf->base;
 330
 331  cleanup_dri_drawable:
 332    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 333  cleanup_pixmap:
 334    if (type == EGL_PBUFFER_BIT)
 335       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 336  cleanup_surf:
 337    free(dri2_surf);
 338
 339    return NULL;
 340 }
 341
 342 /**
 343  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 344  */
 345 static _EGLSurface *
 346 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 347                                _EGLConfig *conf, void *native_window,
 348                                const EGLint *attrib_list)
 349 {
 350    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 351    _EGLSurface *surf;
 352
 353    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 354                                   native_window, attrib_list);
 355    if (surf != NULL) {
 356       /* When we first create the DRI2 drawable, its swap interval on the
 357        * server side is 1.
 358        */
 359       surf->SwapInterval = 1;
 360
 361       /* Override that with a driconf-set value. */
 362       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 363    }
 364
 365    return surf;
 366 }
 367
 368 static _EGLSurface *
 369 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 370                                _EGLConfig *conf, void *native_pixmap,
 371                                const EGLint *attrib_list)
 372 {
 373    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 374                                   native_pixmap, attrib_list);
 375 }
 376
 377 static _EGLSurface *
 378 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 379                                 _EGLConfig *conf, const EGLint *attrib_list)
 380 {
 381    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 382                                   XCB_WINDOW_NONE, attrib_list);
 383 }
 384
 385 static EGLBoolean
 386 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 387 {
 388    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 389    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 390
 391    (void) drv;
 392
 393    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 394
 395    if (dri2_dpy->dri2) {
 396       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 397    } else {
 398       assert(dri2_dpy->swrast);
 399       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 400    }
 401
 402    if (surf->Type == EGL_PBUFFER_BIT)
 403       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 404
 405    free(surf);
 406
 407    return EGL_TRUE;
 408 }
 409
 410 /**
 411  * Function utilizes swrastGetDrawableInfo to get surface
 412  * geometry from x server and calls default query surface
 413  * implementation that returns the updated values.
 414  *
 415  * In case of errors we still return values that we currently
 416  * have.
 417  */
 418 static EGLBoolean
 419 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 420                    _EGLSurface *surf, EGLint attribute,
 421                    EGLint *value)
 422 {
 423    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 424    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 425    int x, y, w, h;
 426
 427    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 428
 429    switch (attribute) {
 430    case EGL_WIDTH:
 431    case EGL_HEIGHT:
 432       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 433          surf->Width = w;
 434          surf->Height = h;
 435       }
 436       break;
 437    default:
 438       break;
 439    }
 440    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 441 }
 442
 443 /**
 444  * Process list of buffer received from the server
 445  *
 446  * Processes the list of buffers received in a reply from the server to either
 447  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 448  */
 449 static void
 450 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 451                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 452 {
 453    struct dri2_egl_display *dri2_dpy =
 454       dri2_egl_display(dri2_surf->base.Resource.Display);
 455    xcb_rectangle_t rectangle;
 456
 457    dri2_surf->have_fake_front = false;
 458
 459    /* This assumes the DRI2 buffer attachment tokens matches the
 460     * __DRIbuffer tokens. */
 461    for (unsigned i = 0; i < count; i++) {
 462       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 463       dri2_surf->buffers[i].name = buffers[i].name;
 464       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 465       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 466       dri2_surf->buffers[i].flags = buffers[i].flags;
 467
 468       /* We only use the DRI drivers single buffer configs.  This
 469        * means that if we try to render to a window, DRI2 will give us
 470        * the fake front buffer, which we'll use as a back buffer.
 471        * Note that EGL doesn't require that several clients rendering
 472        * to the same window must see the same aux buffers. */
 473       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 474          dri2_surf->have_fake_front = true;
 475    }
 476
 477    if (dri2_surf->region != XCB_NONE)
 478       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 479
 480    rectangle.x = 0;
 481    rectangle.y = 0;
 482    rectangle.width = dri2_surf->base.Width;
 483    rectangle.height = dri2_surf->base.Height;
 484    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 485    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 486 }
 487
 488 static __DRIbuffer *
 489 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 490                      int *width, int *height,
 491                      unsigned int *attachments, int count,
 492                      int *out_count, void *loaderPrivate)
 493 {
 494    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 495    struct dri2_egl_display *dri2_dpy =
 496       dri2_egl_display(dri2_surf->base.Resource.Display);
 497    xcb_dri2_dri2_buffer_t *buffers;
 498    xcb_dri2_get_buffers_reply_t *reply;
 499    xcb_dri2_get_buffers_cookie_t cookie;
 500
 501    (void) driDrawable;
 502
 503    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 504                                             dri2_surf->drawable,
 505                                             count, count, attachments);
 506    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 507    if (reply == NULL)
 508       return NULL;
 509    buffers = xcb_dri2_get_buffers_buffers (reply);
 510    if (buffers == NULL)
 511       return NULL;
 512
 513    *out_count = reply->count;
 514    dri2_surf->base.Width = *width = reply->width;
 515    dri2_surf->base.Height = *height = reply->height;
 516    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 517
 518    free(reply);
 519
 520    return dri2_surf->buffers;
 521 }
 522
 523 static __DRIbuffer *
 524 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 525                                  int *width, int *height,
 526                                  unsigned int *attachments, int count,
 527                                  int *out_count, void *loaderPrivate)
 528 {
 529    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 530    struct dri2_egl_display *dri2_dpy =
 531       dri2_egl_display(dri2_surf->base.Resource.Display);
 532    xcb_dri2_dri2_buffer_t *buffers;
 533    xcb_dri2_get_buffers_with_format_reply_t *reply;
 534    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 535    xcb_dri2_attach_format_t *format_attachments;
 536
 537    (void) driDrawable;
 538
 539    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 540    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 541                                                         dri2_surf->drawable,
 542                                                         count, count,
 543                                                         format_attachments);
 544
 545    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 546                                                    cookie, NULL);
 547    if (reply == NULL)
 548       return NULL;
 549
 550    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 551    dri2_surf->base.Width = *width = reply->width;
 552    dri2_surf->base.Height = *height = reply->height;
 553    *out_count = reply->count;
 554    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 555
 556    free(reply);
 557
 558    return dri2_surf->buffers;
 559 }
 560
 561 static void
 562 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 563 {
 564    (void) driDrawable;
 565
 566    /* FIXME: Does EGL support front buffer rendering at all? */
 567
 568 #if 0
 569    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 570
 571    dri2WaitGL(dri2_surf);
 572 #else
 573    (void) loaderPrivate;
 574 #endif
 575 }
 576
 577 static int
 578 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 579 {
 580    xcb_dri2_authenticate_reply_t *authenticate;
 581    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 582    int ret = 0;
 583
 584    authenticate_cookie =
 585       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 586    authenticate =
 587       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 588
 589    if (authenticate == NULL || !authenticate->authenticated)
 590       ret = -1;
 591
 592    free(authenticate);
 593
 594    return ret;
 595 }
 596
 597 static EGLBoolean
 598 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 599 {
 600 #ifdef HAVE_LIBDRM
 601    drm_magic_t magic;
 602
 603    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 604       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 605       return EGL_FALSE;
 606    }
 607
 608    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 609       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 610       return EGL_FALSE;
 611    }
 612 #endif
 613    return EGL_TRUE;
 614 }
 615
 616 static EGLBoolean
 617 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 618 {
 619    xcb_xfixes_query_version_reply_t *xfixes_query;
 620    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 621    xcb_dri2_query_version_reply_t *dri2_query;
 622    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 623    xcb_dri2_connect_reply_t *connect;
 624    xcb_dri2_connect_cookie_t connect_cookie;
 625    xcb_generic_error_t *error;
 626    char *driver_name, *loader_driver_name, *device_name;
 627    const xcb_query_extension_reply_t *extension;
 628
 629    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 630    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 631
 632    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 633    if (!(extension && extension->present))
 634       return EGL_FALSE;
 635
 636    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 637    if (!(extension && extension->present))
 638       return EGL_FALSE;
 639
 640    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 641                                                   XCB_XFIXES_MAJOR_VERSION,
 642                                                   XCB_XFIXES_MINOR_VERSION);
 643
 644    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 645                                                XCB_DRI2_MAJOR_VERSION,
 646                                                XCB_DRI2_MINOR_VERSION);
 647
 648    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 649                                    XCB_DRI2_DRIVER_TYPE_DRI);
 650
 651    xfixes_query =
 652       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 653                                       xfixes_query_cookie, &error);
 654    if (xfixes_query == NULL ||
 655        error != NULL || xfixes_query->major_version < 2) {
 656       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 657       free(error);
 658       free(xfixes_query);
 659       return EGL_FALSE;
 660    }
 661    free(xfixes_query);
 662
 663    dri2_query =
 664       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 665    if (dri2_query == NULL || error != NULL) {
 666       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 667       free(error);
 668       return EGL_FALSE;
 669    }
 670    dri2_dpy->dri2_major = dri2_query->major_version;
 671    dri2_dpy->dri2_minor = dri2_query->minor_version;
 672    free(dri2_query);
 673
 674    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 675    if (connect == NULL ||
 676        connect->driver_name_length + connect->device_name_length == 0) {
 677       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 678       return EGL_FALSE;
 679    }
 680
 681    device_name = xcb_dri2_connect_device_name (connect);
 682
 683    dri2_dpy->fd = loader_open_device(device_name);
 684    if (dri2_dpy->fd == -1) {
 685       _eglLog(_EGL_WARNING,
 686               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 687       free(connect);
 688       return EGL_FALSE;
 689    }
 690
 691    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 692       close(dri2_dpy->fd);
 693       free(connect);
 694       return EGL_FALSE;
 695    }
 696
 697    driver_name = xcb_dri2_connect_driver_name (connect);
 698
 699    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 700     * Otherwise, default to the server's value.
 701     */
 702    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 703    if (loader_driver_name) {
 704       dri2_dpy->driver_name = loader_driver_name;
 705    } else {
 706       dri2_dpy->driver_name =
 707          strndup(driver_name,
 708                  xcb_dri2_connect_driver_name_length(connect));
 709    }
 710
 711    if (dri2_dpy->driver_name == NULL) {
 712       close(dri2_dpy->fd);
 713       free(dri2_dpy->driver_name);
 714       free(connect);
 715       return EGL_FALSE;
 716    }
 717
 718 #ifdef HAVE_WAYLAND_PLATFORM
 719    dri2_dpy->device_name =
 720       strndup(device_name,
 721               xcb_dri2_connect_device_name_length(connect));
 722 #endif
 723
 724    free(connect);
 725
 726    return EGL_TRUE;
 727 }
 728
 729 static int
 730 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 731 {
 732    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 733
 734    return dri2_x11_do_authenticate(dri2_dpy, id);
 735 }
 736
 737 static EGLBoolean
 738 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 739                                  _EGLDisplay *disp, bool supports_preserved)
 740 {
 741    xcb_depth_iterator_t d;
 742    xcb_visualtype_t *visuals;
 743    int config_count = 0;
 744    EGLint surface_type;
 745
 746    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 747
 748    surface_type =
 749       EGL_WINDOW_BIT |
 750       EGL_PIXMAP_BIT |
 751       EGL_PBUFFER_BIT;
 752
 753    if (supports_preserved)
 754       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 755
 756    while (d.rem > 0) {
 757       EGLBoolean class_added[6] = { 0, };
 758
 759       visuals = xcb_depth_visuals(d.data);
 760
 761       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 762          if (class_added[visuals[i]._class])
 763             continue;
 764
 765          class_added[visuals[i]._class] = EGL_TRUE;
 766
 767          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 768             struct dri2_egl_config *dri2_conf;
 769             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 770
 771             const EGLint config_attrs[] = {
 772                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 773                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 774                     EGL_NONE
 775             };
 776
 777             unsigned int rgba_masks[4] = {
 778                visuals[i].red_mask,
 779                visuals[i].green_mask,
 780                visuals[i].blue_mask,
 781                0,
 782             };
 783
 784             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 785                                         surface_type, config_attrs,
 786                                         rgba_masks);
 787             if (dri2_conf)
 788                if (dri2_conf->base.ConfigID == config_count + 1)
 789                   config_count++;
 790
 791             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 792              * Otherwise it will only match a 32-bit RGBA visual.  On a
 793              * composited window manager on X11, this will make all of the
 794              * EGLConfigs with destination alpha get blended by the
 795              * compositor.  This is probably not what the application
 796              * wants... especially on drivers that only have 32-bit RGBA
 797              * EGLConfigs! */
 798             if (d.data->depth == 24) {
 799                rgba_masks[3] =
 800                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 801                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 802                                            surface_type, config_attrs,
 803                                            rgba_masks);
 804                if (dri2_conf)
 805                   if (dri2_conf->base.ConfigID == config_count + 1)
 806                      config_count++;
 807             }
 808          }
 809       }
 810
 811       xcb_depth_next(&d);
 812    }
 813
 814    if (!config_count) {
 815       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 816       return EGL_FALSE;
 817    }
 818
 819    return EGL_TRUE;
 820 }
 821
 822 static EGLBoolean
 823 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 824                  _EGLSurface *draw, xcb_xfixes_region_t region)
 825 {
 826    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 827    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 828    enum xcb_dri2_attachment_t render_attachment;
 829    xcb_dri2_copy_region_cookie_t cookie;
 830
 831    /* No-op for a pixmap or pbuffer surface */
 832    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 833       return EGL_TRUE;
 834
 835    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 836
 837    if (dri2_surf->have_fake_front)
 838       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 839    else
 840       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 841
 842    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 843                                            dri2_surf->drawable,
 844                                            region,
 845                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 846                                            render_attachment);
 847    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 848
 849    return EGL_TRUE;
 850 }
 851
 852 static int64_t
 853 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 854                           int64_t msc, int64_t divisor, int64_t remainder)
 855 {
 856    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 857    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 858    uint32_t msc_hi = msc >> 32;
 859    uint32_t msc_lo = msc & 0xffffffff;
 860    uint32_t divisor_hi = divisor >> 32;
 861    uint32_t divisor_lo = divisor & 0xffffffff;
 862    uint32_t remainder_hi = remainder >> 32;
 863    uint32_t remainder_lo = remainder & 0xffffffff;
 864    xcb_dri2_swap_buffers_cookie_t cookie;
 865    xcb_dri2_swap_buffers_reply_t *reply;
 866    int64_t swap_count = -1;
 867
 868    /* No-op for a pixmap or pbuffer surface */
 869    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 870       return 0;
 871
 872    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 873       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 874
 875    dri2_flush_drawable_for_swapbuffers(disp, draw);
 876
 877    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 878                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 879
 880    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 881
 882    if (reply) {
 883       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 884       free(reply);
 885    }
 886
 887    /* Since we aren't watching for the server's invalidate events like we're
 888     * supposed to (due to XCB providing no mechanism for filtering the events
 889     * the way xlib does), and SwapBuffers is a common cause of invalidate
 890     * events, just shove one down to the driver, even though we haven't told
 891     * the driver that we're the kind of loader that provides reliable
 892     * invalidate events.  This causes the driver to request buffers again at
 893     * its next draw, so that we get the correct buffers if a pageflip
 894     * happened.  The driver should still be using the viewport hack to catch
 895     * window resizes.
 896     */
 897    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 898       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 899
 900    return swap_count;
 901 }
 902
 903 static EGLBoolean
 904 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 905 {
 906    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 907    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 908
 909    if (!dri2_dpy->flush) {
 910       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 911       return EGL_TRUE;
 912    }
 913
 914    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 915       /* Swap failed with a window drawable. */
 916       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 917    }
 918    return EGL_TRUE;
 919 }
 920
 921 static EGLBoolean
 922 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 923                              _EGLSurface *draw,
 924                              EGLint numRects, const EGLint *rects)
 925 {
 926    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 927    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 928    EGLBoolean ret;
 929    xcb_xfixes_region_t region;
 930    xcb_rectangle_t rectangles[16];
 931
 932    if (numRects > (int)ARRAY_SIZE(rectangles))
 933       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 934
 935    for (int i = 0; i < numRects; i++) {
 936       rectangles[i].x = rects[i * 4];
 937       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 938       rectangles[i].width = rects[i * 4 + 2];
 939       rectangles[i].height = rects[i * 4 + 3];
 940    }
 941
 942    region = xcb_generate_id(dri2_dpy->conn);
 943    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 944    ret = dri2_copy_region(drv, disp, draw, region);
 945    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 946
 947    return ret;
 948 }
 949
 950 static EGLBoolean
 951 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 952                      EGLint x, EGLint y, EGLint width, EGLint height)
 953 {
 954    const EGLint rect[4] = { x, y, width, height };
 955
 956    if (x < 0 || y < 0 || width < 0 || height < 0)
 957       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 958
 959    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 960 }
 961
 962 static EGLBoolean
 963 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 964                        EGLint interval)
 965 {
 966    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 967    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 968
 969    if (dri2_dpy->swap_available)
 970       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 971
 972    return EGL_TRUE;
 973 }
 974
 975 static EGLBoolean
 976 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 977                       void *native_pixmap_target)
 978 {
 979    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 980    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 981    xcb_gcontext_t gc;
 982    xcb_pixmap_t target;
 983
 984    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 985    target = (uintptr_t) native_pixmap_target;
 986
 987    (void) drv;
 988
 989    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 990
 991    gc = xcb_generate_id(dri2_dpy->conn);
 992    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 993    xcb_copy_area(dri2_dpy->conn,
 994                   dri2_surf->drawable,
 995                   target,
 996                   gc,
 997                   0, 0,
 998                   0, 0,
 999                   dri2_surf->base.Width,
1000                   dri2_surf->base.Height);
1001    xcb_free_gc(dri2_dpy->conn, gc);
1002
1003    return EGL_TRUE;
1004 }
1005
1006 static _EGLImage *
1007 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1008                              EGLClientBuffer buffer, const EGLint *attr_list)
1009 {
1010    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1011    struct dri2_egl_image *dri2_img;
1012    unsigned int attachments[1];
1013    xcb_drawable_t drawable;
1014    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1015    xcb_dri2_get_buffers_reply_t *buffers_reply;
1016    xcb_dri2_dri2_buffer_t *buffers;
1017    xcb_get_geometry_cookie_t geometry_cookie;
1018    xcb_get_geometry_reply_t *geometry_reply;
1019    xcb_generic_error_t *error;
1020    int stride, format;
1021
1022    (void) ctx;
1023
1024    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1025    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1026    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1027    buffers_cookie =
1028       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1029                                       drawable, 1, 1, attachments);
1030    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1031    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1032                                                buffers_cookie, NULL);
1033    if (buffers_reply == NULL)
1034      return NULL;
1035
1036    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1037    if (buffers == NULL) {
1038       return NULL;
1039    }
1040
1041    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1042                                             geometry_cookie, &error);
1043    if (geometry_reply == NULL || error != NULL) {
1044       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1045       free(error);
1046       free(buffers_reply);
1047       return NULL;
1048    }
1049
1050    switch (geometry_reply->depth) {
1051    case 16:
1052       format = __DRI_IMAGE_FORMAT_RGB565;
1053       break;
1054    case 24:
1055       format = __DRI_IMAGE_FORMAT_XRGB8888;
1056       break;
1057    case 32:
1058       format = __DRI_IMAGE_FORMAT_ARGB8888;
1059       break;
1060    default:
1061       _eglError(EGL_BAD_PARAMETER,
1062                 "dri2_create_image_khr: unsupported pixmap depth");
1063       free(buffers_reply);
1064       free(geometry_reply);
1065       return NULL;
1066    }
1067
1068    dri2_img = malloc(sizeof *dri2_img);
1069    if (!dri2_img) {
1070       free(buffers_reply);
1071       free(geometry_reply);
1072       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1073       return EGL_NO_IMAGE_KHR;
1074    }
1075
1076    _eglInitImage(&dri2_img->base, disp);
1077
1078    stride = buffers[0].pitch / buffers[0].cpp;
1079    dri2_img->dri_image =
1080       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1081                                            buffers_reply->width,
1082                                            buffers_reply->height,
1083                                            format,
1084                                            buffers[0].name,
1085                                            stride,
1086                                            dri2_img);
1087
1088    free(buffers_reply);
1089    free(geometry_reply);
1090
1091    return &dri2_img->base;
1092 }
1093
1094 static _EGLImage *
1095 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1096                           _EGLContext *ctx, EGLenum target,
1097                           EGLClientBuffer buffer, const EGLint *attr_list)
1098 {
1099    (void) drv;
1100
1101    switch (target) {
1102    case EGL_NATIVE_PIXMAP_KHR:
1103       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1104    default:
1105       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1106    }
1107 }
1108
1109 static EGLBoolean
1110 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1111                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1112                          EGLuint64KHR *sbc)
1113 {
1114    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1115    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1116    xcb_dri2_get_msc_cookie_t cookie;
1117    xcb_dri2_get_msc_reply_t *reply;
1118
1119    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1120    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1121
1122    if (!reply)
1123       return _eglError(EGL_BAD_ACCESS, __func__);
1124
1125    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1126    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1127    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1128    free(reply);
1129
1130    return EGL_TRUE;
1131 }
1132
1133 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1134    .authenticate = NULL,
1135    .create_window_surface = dri2_x11_create_window_surface,
1136    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1137    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1138    .destroy_surface = dri2_x11_destroy_surface,
1139    .create_image = dri2_create_image_khr,
1140    .swap_interval = dri2_fallback_swap_interval,
1141    .swap_buffers = dri2_x11_swap_buffers,
1142    .set_damage_region = dri2_fallback_set_damage_region,
1143    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1144    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1145    .copy_buffers = dri2_x11_copy_buffers,
1146    .query_buffer_age = dri2_fallback_query_buffer_age,
1147    .query_surface = dri2_query_surface,
1148    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1149    .get_sync_values = dri2_fallback_get_sync_values,
1150    .get_dri_drawable = dri2_surface_get_dri_drawable,
1151 };
1152
1153 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1154    .authenticate = dri2_x11_authenticate,
1155    .create_window_surface = dri2_x11_create_window_surface,
1156    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1157    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1158    .destroy_surface = dri2_x11_destroy_surface,
1159    .create_image = dri2_x11_create_image_khr,
1160    .swap_interval = dri2_x11_swap_interval,
1161    .swap_buffers = dri2_x11_swap_buffers,
1162    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1163    .swap_buffers_region = dri2_x11_swap_buffers_region,
1164    .set_damage_region = dri2_fallback_set_damage_region,
1165    .post_sub_buffer = dri2_x11_post_sub_buffer,
1166    .copy_buffers = dri2_x11_copy_buffers,
1167    .query_buffer_age = dri2_fallback_query_buffer_age,
1168    .query_surface = dri2_query_surface,
1169    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1170    .get_sync_values = dri2_x11_get_sync_values,
1171    .get_dri_drawable = dri2_surface_get_dri_drawable,
1172 };
1173
1174 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1175    .base = { __DRI_SWRAST_LOADER, 1 },
1176
1177    .getDrawableInfo = swrastGetDrawableInfo,
1178    .putImage        = swrastPutImage,
1179    .getImage        = swrastGetImage,
1180 };
1181
1182 static const __DRIextension *swrast_loader_extensions[] = {
1183    &swrast_loader_extension.base,
1184    &image_lookup_extension.base,
1185    NULL,
1186 };
1187
1188 static EGLBoolean
1189 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1190                         struct dri2_egl_display *dri2_dpy)
1191 {
1192    xcb_screen_iterator_t s;
1193    int screen = (uintptr_t)disp->Options.Platform;
1194    const char *msg;
1195
1196    disp->DriverData = (void *) dri2_dpy;
1197    if (disp->PlatformDisplay == NULL) {
1198       dri2_dpy->conn = xcb_connect(NULL, &screen);
1199       dri2_dpy->own_device = true;
1200    } else {
1201       Display *dpy = disp->PlatformDisplay;
1202
1203       dri2_dpy->conn = XGetXCBConnection(dpy);
1204       screen = DefaultScreen(dpy);
1205    }
1206
1207    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1208       msg = "xcb_connect failed";
1209       goto disconnect;
1210    }
1211
1212    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1213    dri2_dpy->screen = get_xcb_screen(s, screen);
1214    if (!dri2_dpy->screen) {
1215       msg = "failed to get xcb screen";
1216       goto disconnect;
1217    }
1218
1219    return EGL_TRUE;
1220 disconnect:
1221    if (disp->PlatformDisplay == NULL)
1222       xcb_disconnect(dri2_dpy->conn);
1223
1224    return _eglError(EGL_BAD_ALLOC, msg);
1225 }
1226
1227 static EGLBoolean
1228 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1229 {
1230    struct dri2_egl_display *dri2_dpy;
1231
1232    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1233    if (!dri2_dpy)
1234       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1235
1236    dri2_dpy->fd = -1;
1237    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1238       goto cleanup;
1239
1240    /*
1241     * Every hardware driver_name is set using strdup. Doing the same in
1242     * here will allow is to simply free the memory at dri2_terminate().
1243     */
1244    dri2_dpy->driver_name = strdup("swrast");
1245    if (!dri2_load_driver_swrast(disp))
1246       goto cleanup;
1247
1248    dri2_dpy->loader_extensions = swrast_loader_extensions;
1249
1250    if (!dri2_create_screen(disp))
1251       goto cleanup;
1252
1253    if (!dri2_setup_extensions(disp))
1254       goto cleanup;
1255
1256    dri2_setup_screen(disp);
1257
1258    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1259       goto cleanup;
1260
1261    /* Fill vtbl last to prevent accidentally calling virtual function during
1262     * initialization.
1263     */
1264    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1265
1266    return EGL_TRUE;
1267
1268  cleanup:
1269    dri2_display_destroy(disp);
1270    return EGL_FALSE;
1271 }
1272
1273 static void
1274 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1275 {
1276    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1277    int arbitrary_max_interval = 1000;
1278
1279    /* default behavior for no SwapBuffers support: no vblank syncing
1280     * either.
1281     */
1282    dri2_dpy->min_swap_interval = 0;
1283    dri2_dpy->max_swap_interval = 0;
1284
1285    if (!dri2_dpy->swap_available)
1286       return;
1287
1288    /* If we do have swapbuffers, then we can support pretty much any swap
1289     * interval.
1290     */
1291    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1292 }
1293
1294 #ifdef HAVE_DRI3
1295
1296 static const __DRIextension *dri3_image_loader_extensions[] = {
1297    &dri3_image_loader_extension.base,
1298    &image_lookup_extension.base,
1299    &use_invalidate.base,
1300    NULL,
1301 };
1302
1303 static EGLBoolean
1304 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1305 {
1306    struct dri2_egl_display *dri2_dpy;
1307
1308    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1309    if (!dri2_dpy)
1310       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1311
1312    dri2_dpy->fd = -1;
1313    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1314       goto cleanup;
1315
1316    if (!dri3_x11_connect(dri2_dpy))
1317       goto cleanup;
1318
1319    if (!dri2_load_driver_dri3(disp))
1320       goto cleanup;
1321
1322    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1323
1324    dri2_dpy->swap_available = true;
1325    dri2_dpy->invalidate_available = true;
1326
1327    if (!dri2_create_screen(disp))
1328       goto cleanup;
1329
1330    if (!dri2_setup_extensions(disp))
1331       goto cleanup;
1332
1333    dri2_setup_screen(disp);
1334
1335    dri2_x11_setup_swap_interval(disp);
1336
1337    if (!dri2_dpy->is_different_gpu)
1338       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1339    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1340    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1341    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1342
1343    dri2_set_WL_bind_wayland_display(drv, disp);
1344
1345    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1346       goto cleanup;
1347
1348    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1349    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1350    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1351    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1352    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1353    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1354
1355    /* Fill vtbl last to prevent accidentally calling virtual function during
1356     * initialization.
1357     */
1358    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1359
1360    _eglLog(_EGL_INFO, "Using DRI3");
1361
1362    return EGL_TRUE;
1363
1364  cleanup:
1365    dri2_display_destroy(disp);
1366    return EGL_FALSE;
1367 }
1368 #endif
1369
1370 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1371    .base = { __DRI_DRI2_LOADER, 2 },
1372
1373    .getBuffers           = dri2_x11_get_buffers,
1374    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1375    .getBuffersWithFormat = NULL,
1376 };
1377
1378 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1379    .base = { __DRI_DRI2_LOADER, 3 },
1380
1381    .getBuffers           = dri2_x11_get_buffers,
1382    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1383    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1384 };
1385
1386 static const __DRIextension *dri2_loader_extensions_old[] = {
1387    &dri2_loader_extension_old.base,
1388    &image_lookup_extension.base,
1389    &background_callable_extension.base,
1390    NULL,
1391 };
1392
1393 static const __DRIextension *dri2_loader_extensions[] = {
1394    &dri2_loader_extension.base,
1395    &image_lookup_extension.base,
1396    &background_callable_extension.base,
1397    NULL,
1398 };
1399
1400 static EGLBoolean
1401 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1402 {
1403    struct dri2_egl_display *dri2_dpy;
1404
1405    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1406    if (!dri2_dpy)
1407       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1408
1409    dri2_dpy->fd = -1;
1410    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1411       goto cleanup;
1412
1413    if (!dri2_x11_connect(dri2_dpy))
1414       goto cleanup;
1415
1416    if (!dri2_load_driver(disp))
1417       goto cleanup;
1418
1419    if (dri2_dpy->dri2_minor >= 1)
1420       dri2_dpy->loader_extensions = dri2_loader_extensions;
1421    else
1422       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1423
1424    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1425    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1426
1427    if (!dri2_create_screen(disp))
1428       goto cleanup;
1429
1430    if (!dri2_setup_extensions(disp))
1431       goto cleanup;
1432
1433    dri2_setup_screen(disp);
1434
1435    dri2_x11_setup_swap_interval(disp);
1436
1437    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1438    disp->Extensions.NOK_swap_region = EGL_TRUE;
1439    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1440    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1441    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1442
1443    dri2_set_WL_bind_wayland_display(drv, disp);
1444
1445    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1446       goto cleanup;
1447
1448    /* Fill vtbl last to prevent accidentally calling virtual function during
1449     * initialization.
1450     */
1451    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1452
1453    _eglLog(_EGL_INFO, "Using DRI2");
1454
1455    return EGL_TRUE;
1456
1457  cleanup:
1458    dri2_display_destroy(disp);
1459    return EGL_FALSE;
1460 }
1461
1462 EGLBoolean
1463 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1464 {
1465    EGLBoolean initialized = EGL_FALSE;
1466
1467    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1468 #ifdef HAVE_DRI3
1469       if (!getenv("LIBGL_DRI3_DISABLE"))
1470          initialized = dri2_initialize_x11_dri3(drv, disp);
1471 #endif
1472
1473       if (!initialized)
1474          initialized = dri2_initialize_x11_dri2(drv, disp);
1475    }
1476
1477    if (!initialized)
1478       initialized = dri2_initialize_x11_swrast(drv, disp);
1479
1480    return initialized;
1481 }
1482