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/debug.h"
  44 #include "util/macros.h"
  45
  46 #include "egl_dri2.h"
  47 #include "egl_dri2_fallbacks.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 uint32_t
  59 dri2_format_for_depth(uint32_t depth);
  60
  61 static void
  62 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  63                      struct dri2_egl_surface * dri2_surf)
  64 {
  65    uint32_t           mask;
  66    const uint32_t     function = GXcopy;
  67    uint32_t           valgc[2];
  68
  69    /* create GC's */
  70    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION;
  72    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  73
  74    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  75    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  76    valgc[0] = function;
  77    valgc[1] = False;
  78    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  79    switch (dri2_surf->depth) {
  80       case 32:
  81       case 30:
  82       case 24:
  83          dri2_surf->bytes_per_pixel = 4;
  84          break;
  85       case 16:
  86          dri2_surf->bytes_per_pixel = 2;
  87          break;
  88       case 8:
  89          dri2_surf->bytes_per_pixel = 1;
  90          break;
  91       case 0:
  92          dri2_surf->bytes_per_pixel = 0;
  93          break;
  94       default:
  95          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  96    }
  97 }
  98
  99 static void
 100 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
 101                       struct dri2_egl_surface * dri2_surf)
 102 {
 103    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 104    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 105 }
 106
 107 static bool
 108 x11_get_drawable_info(__DRIdrawable * draw,
 109                       int *x, int *y, int *w, int *h,
 110                       void *loaderPrivate)
 111 {
 112    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 113    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 114
 115    xcb_get_geometry_cookie_t cookie;
 116    xcb_get_geometry_reply_t *reply;
 117    xcb_generic_error_t *error;
 118    bool ret;
 119
 120    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 121    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 122    if (reply == NULL)
 123       return false;
 124
 125    if (error != NULL) {
 126       ret = false;
 127       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 128       free(error);
 129    } else {
 130       *x = reply->x;
 131       *y = reply->y;
 132       *w = reply->width;
 133       *h = reply->height;
 134       ret = true;
 135    }
 136    free(reply);
 137    return ret;
 138 }
 139
 140 static void
 141 swrastGetDrawableInfo(__DRIdrawable * draw,
 142                       int *x, int *y, int *w, int *h,
 143                       void *loaderPrivate)
 144 {
 145    *x = *y = *w = *h = 0;
 146    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 147 }
 148
 149 static void
 150 swrastPutImage(__DRIdrawable * draw, int op,
 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_gcontext_t gc;
 158
 159    switch (op) {
 160    case __DRI_SWRAST_IMAGE_OP_DRAW:
 161       gc = dri2_surf->gc;
 162       break;
 163    case __DRI_SWRAST_IMAGE_OP_SWAP:
 164       gc = dri2_surf->swapgc;
 165       break;
 166    default:
 167       return;
 168    }
 169
 170    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 171                  gc, w, h, x, y, 0, dri2_surf->depth,
 172                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 173 }
 174
 175 static void
 176 swrastGetImage(__DRIdrawable * read,
 177                int x, int y, int w, int h,
 178                char *data, void *loaderPrivate)
 179 {
 180    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 181    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 182
 183    xcb_get_image_cookie_t cookie;
 184    xcb_get_image_reply_t *reply;
 185    xcb_generic_error_t *error;
 186
 187    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 188                            dri2_surf->drawable, x, y, w, h, ~0);
 189    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 190    if (reply == NULL)
 191       return;
 192
 193    if (error != NULL) {
 194       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 195       free(error);
 196    } else {
 197       uint32_t bytes = xcb_get_image_data_length(reply);
 198       uint8_t *idata = xcb_get_image_data(reply);
 199       memcpy(data, idata, bytes);
 200    }
 201    free(reply);
 202 }
 203
 204
 205 static xcb_screen_t *
 206 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 207 {
 208     for (; iter.rem; --screen, xcb_screen_next(&iter))
 209         if (screen == 0)
 210             return iter.data;
 211
 212     return NULL;
 213 }
 214
 215
 216 /**
 217  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 218  */
 219 static _EGLSurface *
 220 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 221                         _EGLConfig *conf, void *native_surface,
 222                         const EGLint *attrib_list)
 223 {
 224    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 225    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 226    struct dri2_egl_surface *dri2_surf;
 227    xcb_get_geometry_cookie_t cookie;
 228    xcb_get_geometry_reply_t *reply;
 229    xcb_generic_error_t *error;
 230    const __DRIconfig *config;
 231
 232    (void) drv;
 233
 234    dri2_surf = malloc(sizeof *dri2_surf);
 235    if (!dri2_surf) {
 236       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 237       return NULL;
 238    }
 239
 240    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list, false))
 241       goto cleanup_surf;
 242
 243    dri2_surf->region = XCB_NONE;
 244    if (type == EGL_PBUFFER_BIT) {
 245       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 246       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 247                        dri2_surf->drawable, dri2_dpy->screen->root,
 248                         dri2_surf->base.Width, dri2_surf->base.Height);
 249    } else {
 250       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 251       dri2_surf->drawable = (uintptr_t) native_surface;
 252    }
 253
 254    config = dri2_get_dri_config(dri2_conf, type,
 255                                 dri2_surf->base.GLColorspace);
 256
 257    if (!config) {
 258       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 259       goto cleanup_pixmap;
 260    }
 261
 262    if (dri2_dpy->dri2) {
 263       dri2_surf->dri_drawable =
 264          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 265                                            dri2_surf);
 266    } else {
 267       assert(dri2_dpy->swrast);
 268       dri2_surf->dri_drawable =
 269          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 270                                              dri2_surf);
 271    }
 272
 273    if (dri2_surf->dri_drawable == NULL) {
 274       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 275       goto cleanup_pixmap;
 276    }
 277
 278    if (type != EGL_PBUFFER_BIT) {
 279       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 280       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 281       if (error != NULL) {
 282          if (error->error_code == BadAlloc)
 283             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 284          else if (type == EGL_WINDOW_BIT)
 285             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 286          else
 287             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 288          free(error);
 289          goto cleanup_dri_drawable;
 290       } else if (reply == NULL) {
 291          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 292          goto cleanup_dri_drawable;
 293       }
 294
 295       dri2_surf->base.Width = reply->width;
 296       dri2_surf->base.Height = reply->height;
 297       dri2_surf->depth = reply->depth;
 298       free(reply);
 299    }
 300
 301    if (dri2_dpy->dri2) {
 302       xcb_void_cookie_t cookie;
 303       int conn_error;
 304
 305       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 306                                                 dri2_surf->drawable);
 307       error = xcb_request_check(dri2_dpy->conn, cookie);
 308       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 309       if (conn_error || error != NULL) {
 310          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 311             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 312          else if (type == EGL_WINDOW_BIT)
 313             _eglError(EGL_BAD_NATIVE_WINDOW,
 314                       "xcb_dri2_create_drawable_checked");
 315          else
 316             _eglError(EGL_BAD_NATIVE_PIXMAP,
 317                       "xcb_dri2_create_drawable_checked");
 318          free(error);
 319          goto cleanup_dri_drawable;
 320       }
 321    } else {
 322       if (type == EGL_PBUFFER_BIT) {
 323          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 324       }
 325       swrastCreateDrawable(dri2_dpy, dri2_surf);
 326    }
 327
 328    /* we always copy the back buffer to front */
 329    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 330
 331    return &dri2_surf->base;
 332
 333  cleanup_dri_drawable:
 334    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 335  cleanup_pixmap:
 336    if (type == EGL_PBUFFER_BIT)
 337       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 338  cleanup_surf:
 339    free(dri2_surf);
 340
 341    return NULL;
 342 }
 343
 344 /**
 345  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 346  */
 347 static _EGLSurface *
 348 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 349                                _EGLConfig *conf, void *native_window,
 350                                const EGLint *attrib_list)
 351 {
 352    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 353    _EGLSurface *surf;
 354
 355    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 356                                   native_window, attrib_list);
 357    if (surf != NULL) {
 358       /* When we first create the DRI2 drawable, its swap interval on the
 359        * server side is 1.
 360        */
 361       surf->SwapInterval = 1;
 362
 363       /* Override that with a driconf-set value. */
 364       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 365    }
 366
 367    return surf;
 368 }
 369
 370 static _EGLSurface *
 371 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 372                                _EGLConfig *conf, void *native_pixmap,
 373                                const EGLint *attrib_list)
 374 {
 375    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 376                                   native_pixmap, attrib_list);
 377 }
 378
 379 static _EGLSurface *
 380 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 381                                 _EGLConfig *conf, const EGLint *attrib_list)
 382 {
 383    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 384                                   NULL, attrib_list);
 385 }
 386
 387 static EGLBoolean
 388 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 389 {
 390    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 391    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 392
 393    (void) drv;
 394
 395    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 396
 397    if (dri2_dpy->dri2) {
 398       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 399    } else {
 400       assert(dri2_dpy->swrast);
 401       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 402    }
 403
 404    if (surf->Type == EGL_PBUFFER_BIT)
 405       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 406
 407    dri2_fini_surface(surf);
 408    free(surf);
 409
 410    return EGL_TRUE;
 411 }
 412
 413 /**
 414  * Function utilizes swrastGetDrawableInfo to get surface
 415  * geometry from x server and calls default query surface
 416  * implementation that returns the updated values.
 417  *
 418  * In case of errors we still return values that we currently
 419  * have.
 420  */
 421 static EGLBoolean
 422 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 423                    _EGLSurface *surf, EGLint attribute,
 424                    EGLint *value)
 425 {
 426    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 427    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 428    int x, y, w, h;
 429
 430    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 431
 432    switch (attribute) {
 433    case EGL_WIDTH:
 434    case EGL_HEIGHT:
 435       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 436          surf->Width = w;
 437          surf->Height = h;
 438       }
 439       break;
 440    default:
 441       break;
 442    }
 443    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 444 }
 445
 446 /**
 447  * Process list of buffer received from the server
 448  *
 449  * Processes the list of buffers received in a reply from the server to either
 450  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 451  */
 452 static void
 453 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 454                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 455 {
 456    struct dri2_egl_display *dri2_dpy =
 457       dri2_egl_display(dri2_surf->base.Resource.Display);
 458    xcb_rectangle_t rectangle;
 459
 460    dri2_surf->have_fake_front = false;
 461
 462    /* This assumes the DRI2 buffer attachment tokens matches the
 463     * __DRIbuffer tokens. */
 464    for (unsigned i = 0; i < count; i++) {
 465       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 466       dri2_surf->buffers[i].name = buffers[i].name;
 467       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 468       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 469       dri2_surf->buffers[i].flags = buffers[i].flags;
 470
 471       /* We only use the DRI drivers single buffer configs.  This
 472        * means that if we try to render to a window, DRI2 will give us
 473        * the fake front buffer, which we'll use as a back buffer.
 474        * Note that EGL doesn't require that several clients rendering
 475        * to the same window must see the same aux buffers. */
 476       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 477          dri2_surf->have_fake_front = true;
 478    }
 479
 480    if (dri2_surf->region != XCB_NONE)
 481       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 482
 483    rectangle.x = 0;
 484    rectangle.y = 0;
 485    rectangle.width = dri2_surf->base.Width;
 486    rectangle.height = dri2_surf->base.Height;
 487    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 488    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 489 }
 490
 491 static __DRIbuffer *
 492 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 493                      int *width, int *height,
 494                      unsigned int *attachments, int count,
 495                      int *out_count, void *loaderPrivate)
 496 {
 497    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 498    struct dri2_egl_display *dri2_dpy =
 499       dri2_egl_display(dri2_surf->base.Resource.Display);
 500    xcb_dri2_dri2_buffer_t *buffers;
 501    xcb_dri2_get_buffers_reply_t *reply;
 502    xcb_dri2_get_buffers_cookie_t cookie;
 503
 504    (void) driDrawable;
 505
 506    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 507                                             dri2_surf->drawable,
 508                                             count, count, attachments);
 509    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 510    if (reply == NULL)
 511       return NULL;
 512    buffers = xcb_dri2_get_buffers_buffers (reply);
 513    if (buffers == NULL)
 514       return NULL;
 515
 516    *out_count = reply->count;
 517    dri2_surf->base.Width = *width = reply->width;
 518    dri2_surf->base.Height = *height = reply->height;
 519    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 520
 521    free(reply);
 522
 523    return dri2_surf->buffers;
 524 }
 525
 526 static __DRIbuffer *
 527 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 528                                  int *width, int *height,
 529                                  unsigned int *attachments, int count,
 530                                  int *out_count, void *loaderPrivate)
 531 {
 532    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 533    struct dri2_egl_display *dri2_dpy =
 534       dri2_egl_display(dri2_surf->base.Resource.Display);
 535    xcb_dri2_dri2_buffer_t *buffers;
 536    xcb_dri2_get_buffers_with_format_reply_t *reply;
 537    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 538    xcb_dri2_attach_format_t *format_attachments;
 539
 540    (void) driDrawable;
 541
 542    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 543    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 544                                                         dri2_surf->drawable,
 545                                                         count, count,
 546                                                         format_attachments);
 547
 548    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 549                                                    cookie, NULL);
 550    if (reply == NULL)
 551       return NULL;
 552
 553    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 554    dri2_surf->base.Width = *width = reply->width;
 555    dri2_surf->base.Height = *height = reply->height;
 556    *out_count = reply->count;
 557    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 558
 559    free(reply);
 560
 561    return dri2_surf->buffers;
 562 }
 563
 564 static void
 565 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 566 {
 567    (void) driDrawable;
 568
 569    /* FIXME: Does EGL support front buffer rendering at all? */
 570
 571 #if 0
 572    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 573
 574    dri2WaitGL(dri2_surf);
 575 #else
 576    (void) loaderPrivate;
 577 #endif
 578 }
 579
 580 static int
 581 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 582 {
 583    xcb_dri2_authenticate_reply_t *authenticate;
 584    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 585    int ret = 0;
 586
 587    authenticate_cookie =
 588       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 589    authenticate =
 590       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 591
 592    if (authenticate == NULL || !authenticate->authenticated)
 593       ret = -1;
 594
 595    free(authenticate);
 596
 597    return ret;
 598 }
 599
 600 static EGLBoolean
 601 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 602 {
 603 #ifdef HAVE_LIBDRM
 604    drm_magic_t magic;
 605
 606    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 607       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 608       return EGL_FALSE;
 609    }
 610
 611    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 612       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 613       return EGL_FALSE;
 614    }
 615 #endif
 616    return EGL_TRUE;
 617 }
 618
 619 static EGLBoolean
 620 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 621 {
 622    xcb_xfixes_query_version_reply_t *xfixes_query;
 623    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 624    xcb_dri2_query_version_reply_t *dri2_query;
 625    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 626    xcb_dri2_connect_reply_t *connect;
 627    xcb_dri2_connect_cookie_t connect_cookie;
 628    xcb_generic_error_t *error;
 629    char *driver_name, *loader_driver_name, *device_name;
 630    const xcb_query_extension_reply_t *extension;
 631
 632    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 633    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 634
 635    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 636    if (!(extension && extension->present))
 637       return EGL_FALSE;
 638
 639    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 640    if (!(extension && extension->present))
 641       return EGL_FALSE;
 642
 643    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 644                                                   XCB_XFIXES_MAJOR_VERSION,
 645                                                   XCB_XFIXES_MINOR_VERSION);
 646
 647    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 648                                                XCB_DRI2_MAJOR_VERSION,
 649                                                XCB_DRI2_MINOR_VERSION);
 650
 651    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 652                                    XCB_DRI2_DRIVER_TYPE_DRI);
 653
 654    xfixes_query =
 655       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 656                                       xfixes_query_cookie, &error);
 657    if (xfixes_query == NULL ||
 658        error != NULL || xfixes_query->major_version < 2) {
 659       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 660       free(error);
 661       free(xfixes_query);
 662       return EGL_FALSE;
 663    }
 664    free(xfixes_query);
 665
 666    dri2_query =
 667       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 668    if (dri2_query == NULL || error != NULL) {
 669       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 670       free(error);
 671       return EGL_FALSE;
 672    }
 673    dri2_dpy->dri2_major = dri2_query->major_version;
 674    dri2_dpy->dri2_minor = dri2_query->minor_version;
 675    free(dri2_query);
 676
 677    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 678    if (connect == NULL ||
 679        connect->driver_name_length + connect->device_name_length == 0) {
 680       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 681       return EGL_FALSE;
 682    }
 683
 684    device_name = xcb_dri2_connect_device_name (connect);
 685
 686    dri2_dpy->fd = loader_open_device(device_name);
 687    if (dri2_dpy->fd == -1) {
 688       _eglLog(_EGL_WARNING,
 689               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 690       free(connect);
 691       return EGL_FALSE;
 692    }
 693
 694    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 695       close(dri2_dpy->fd);
 696       free(connect);
 697       return EGL_FALSE;
 698    }
 699
 700    driver_name = xcb_dri2_connect_driver_name (connect);
 701
 702    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 703     * Otherwise, default to the server's value.
 704     */
 705    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 706    if (loader_driver_name) {
 707       dri2_dpy->driver_name = loader_driver_name;
 708    } else {
 709       dri2_dpy->driver_name =
 710          strndup(driver_name,
 711                  xcb_dri2_connect_driver_name_length(connect));
 712    }
 713
 714    if (dri2_dpy->driver_name == NULL) {
 715       close(dri2_dpy->fd);
 716       free(connect);
 717       return EGL_FALSE;
 718    }
 719
 720 #ifdef HAVE_WAYLAND_PLATFORM
 721    dri2_dpy->device_name =
 722       strndup(device_name,
 723               xcb_dri2_connect_device_name_length(connect));
 724 #endif
 725
 726    free(connect);
 727
 728    return EGL_TRUE;
 729 }
 730
 731 static int
 732 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 733 {
 734    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 735
 736    return dri2_x11_do_authenticate(dri2_dpy, id);
 737 }
 738
 739 static EGLBoolean
 740 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 741                                  _EGLDisplay *disp, bool supports_preserved)
 742 {
 743    xcb_depth_iterator_t d;
 744    xcb_visualtype_t *visuals;
 745    int config_count = 0;
 746    EGLint surface_type;
 747
 748    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 749
 750    surface_type =
 751       EGL_WINDOW_BIT |
 752       EGL_PIXMAP_BIT |
 753       EGL_PBUFFER_BIT;
 754
 755    if (supports_preserved)
 756       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 757
 758    while (d.rem > 0) {
 759       EGLBoolean class_added[6] = { 0, };
 760
 761       visuals = xcb_depth_visuals(d.data);
 762
 763       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 764          if (class_added[visuals[i]._class])
 765             continue;
 766
 767          class_added[visuals[i]._class] = EGL_TRUE;
 768
 769          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 770             struct dri2_egl_config *dri2_conf;
 771             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 772
 773             const EGLint config_attrs[] = {
 774                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 775                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 776                     EGL_NONE
 777             };
 778
 779             unsigned int rgba_masks[4] = {
 780                visuals[i].red_mask,
 781                visuals[i].green_mask,
 782                visuals[i].blue_mask,
 783                0,
 784             };
 785
 786             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 787                                         surface_type, config_attrs,
 788                                         rgba_masks);
 789             if (dri2_conf)
 790                if (dri2_conf->base.ConfigID == config_count + 1)
 791                   config_count++;
 792
 793             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 794              * Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
 795              * Otherwise it will only match a 32-bit RGBA visual.  On a
 796              * composited window manager on X11, this will make all of the
 797              * EGLConfigs with destination alpha get blended by the
 798              * compositor.  This is probably not what the application
 799              * wants... especially on drivers that only have 32-bit RGBA
 800              * EGLConfigs! */
 801             if (d.data->depth == 24 || d.data->depth == 30) {
 802                rgba_masks[3] =
 803                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 804                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 805                                            surface_type, config_attrs,
 806                                            rgba_masks);
 807                if (dri2_conf)
 808                   if (dri2_conf->base.ConfigID == config_count + 1)
 809                      config_count++;
 810             }
 811          }
 812       }
 813
 814       xcb_depth_next(&d);
 815    }
 816
 817    if (!config_count) {
 818       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 819       return EGL_FALSE;
 820    }
 821
 822    return EGL_TRUE;
 823 }
 824
 825 static EGLBoolean
 826 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 827                  _EGLSurface *draw, xcb_xfixes_region_t region)
 828 {
 829    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 830    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 831    enum xcb_dri2_attachment_t render_attachment;
 832    xcb_dri2_copy_region_cookie_t cookie;
 833
 834    /* No-op for a pixmap or pbuffer surface */
 835    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 836       return EGL_TRUE;
 837
 838    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 839
 840    if (dri2_surf->have_fake_front)
 841       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 842    else
 843       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 844
 845    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 846                                            dri2_surf->drawable,
 847                                            region,
 848                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 849                                            render_attachment);
 850    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 851
 852    return EGL_TRUE;
 853 }
 854
 855 static int64_t
 856 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 857                           int64_t msc, int64_t divisor, int64_t remainder)
 858 {
 859    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 860    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 861    uint32_t msc_hi = msc >> 32;
 862    uint32_t msc_lo = msc & 0xffffffff;
 863    uint32_t divisor_hi = divisor >> 32;
 864    uint32_t divisor_lo = divisor & 0xffffffff;
 865    uint32_t remainder_hi = remainder >> 32;
 866    uint32_t remainder_lo = remainder & 0xffffffff;
 867    xcb_dri2_swap_buffers_cookie_t cookie;
 868    xcb_dri2_swap_buffers_reply_t *reply;
 869    int64_t swap_count = -1;
 870
 871    /* No-op for a pixmap or pbuffer surface */
 872    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 873       return 0;
 874
 875    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available) {
 876       swap_count = dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 877    } else {
 878       dri2_flush_drawable_for_swapbuffers(disp, draw);
 879
 880       cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn,
 881                                                dri2_surf->drawable, msc_hi,
 882                                                msc_lo, divisor_hi, divisor_lo,
 883                                                remainder_hi, remainder_lo);
 884
 885       reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 886
 887       if (reply) {
 888          swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 889          free(reply);
 890       }
 891    }
 892
 893    /* Since we aren't watching for the server's invalidate events like we're
 894     * supposed to (due to XCB providing no mechanism for filtering the events
 895     * the way xlib does), and SwapBuffers is a common cause of invalidate
 896     * events, just shove one down to the driver, even though we haven't told
 897     * the driver that we're the kind of loader that provides reliable
 898     * invalidate events.  This causes the driver to request buffers again at
 899     * its next draw, so that we get the correct buffers if a pageflip
 900     * happened.  The driver should still be using the viewport hack to catch
 901     * window resizes.
 902     */
 903    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 904       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 905
 906    return swap_count;
 907 }
 908
 909 static EGLBoolean
 910 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 911 {
 912    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 913    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 914
 915    if (!dri2_dpy->flush) {
 916       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 917       return EGL_TRUE;
 918    }
 919
 920    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 921       /* Swap failed with a window drawable. */
 922       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 923    }
 924    return EGL_TRUE;
 925 }
 926
 927 static EGLBoolean
 928 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 929                              _EGLSurface *draw,
 930                              EGLint numRects, const EGLint *rects)
 931 {
 932    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 933    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 934    EGLBoolean ret;
 935    xcb_xfixes_region_t region;
 936    xcb_rectangle_t rectangles[16];
 937
 938    if (numRects > (int)ARRAY_SIZE(rectangles))
 939       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 940
 941    for (int i = 0; i < numRects; i++) {
 942       rectangles[i].x = rects[i * 4];
 943       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 944       rectangles[i].width = rects[i * 4 + 2];
 945       rectangles[i].height = rects[i * 4 + 3];
 946    }
 947
 948    region = xcb_generate_id(dri2_dpy->conn);
 949    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 950    ret = dri2_copy_region(drv, disp, draw, region);
 951    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 952
 953    return ret;
 954 }
 955
 956 static EGLBoolean
 957 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 958                      EGLint x, EGLint y, EGLint width, EGLint height)
 959 {
 960    const EGLint rect[4] = { x, y, width, height };
 961
 962    if (x < 0 || y < 0 || width < 0 || height < 0)
 963       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 964
 965    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 966 }
 967
 968 static EGLBoolean
 969 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 970                        EGLint interval)
 971 {
 972    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 973    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 974
 975    if (dri2_dpy->swap_available)
 976       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 977
 978    return EGL_TRUE;
 979 }
 980
 981 static EGLBoolean
 982 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 983                       void *native_pixmap_target)
 984 {
 985    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 986    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 987    xcb_gcontext_t gc;
 988    xcb_pixmap_t target;
 989
 990    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 991    target = (uintptr_t) native_pixmap_target;
 992
 993    (void) drv;
 994
 995    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 996
 997    gc = xcb_generate_id(dri2_dpy->conn);
 998    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 999    xcb_copy_area(dri2_dpy->conn,
1000                   dri2_surf->drawable,
1001                   target,
1002                   gc,
1003                   0, 0,
1004                   0, 0,
1005                   dri2_surf->base.Width,
1006                   dri2_surf->base.Height);
1007    xcb_free_gc(dri2_dpy->conn, gc);
1008
1009    return EGL_TRUE;
1010 }
1011
1012 uint32_t
1013 dri2_format_for_depth(uint32_t depth)
1014 {
1015    switch (depth) {
1016    case 16:
1017       return __DRI_IMAGE_FORMAT_RGB565;
1018    case 24:
1019       return __DRI_IMAGE_FORMAT_XRGB8888;
1020    case 30:
1021       return __DRI_IMAGE_FORMAT_XRGB2101010;
1022    case 32:
1023       return __DRI_IMAGE_FORMAT_ARGB8888;
1024    default:
1025       return __DRI_IMAGE_FORMAT_NONE;
1026    }
1027 }
1028
1029
1030 static _EGLImage *
1031 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1032                              EGLClientBuffer buffer, const EGLint *attr_list)
1033 {
1034    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1035    struct dri2_egl_image *dri2_img;
1036    unsigned int attachments[1];
1037    xcb_drawable_t drawable;
1038    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1039    xcb_dri2_get_buffers_reply_t *buffers_reply;
1040    xcb_dri2_dri2_buffer_t *buffers;
1041    xcb_get_geometry_cookie_t geometry_cookie;
1042    xcb_get_geometry_reply_t *geometry_reply;
1043    xcb_generic_error_t *error;
1044    int stride, format;
1045
1046    (void) ctx;
1047
1048    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1049    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1050    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1051    buffers_cookie =
1052       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1053                                       drawable, 1, 1, attachments);
1054    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1055    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1056                                                buffers_cookie, NULL);
1057    if (buffers_reply == NULL)
1058      return NULL;
1059
1060    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1061    if (buffers == NULL) {
1062       return NULL;
1063    }
1064
1065    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1066                                             geometry_cookie, &error);
1067    if (geometry_reply == NULL || error != NULL) {
1068       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1069       free(error);
1070       free(buffers_reply);
1071       return NULL;
1072    }
1073
1074    format = dri2_format_for_depth(geometry_reply->depth);
1075
1076    if (format == __DRI_IMAGE_FORMAT_NONE) {
1077       _eglError(EGL_BAD_PARAMETER,
1078                 "dri2_create_image_khr: unsupported pixmap depth");
1079       free(buffers_reply);
1080       free(geometry_reply);
1081       return NULL;
1082    }
1083
1084    dri2_img = malloc(sizeof *dri2_img);
1085    if (!dri2_img) {
1086       free(buffers_reply);
1087       free(geometry_reply);
1088       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1089       return EGL_NO_IMAGE_KHR;
1090    }
1091
1092    _eglInitImage(&dri2_img->base, disp);
1093
1094    stride = buffers[0].pitch / buffers[0].cpp;
1095    dri2_img->dri_image =
1096       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1097                                            buffers_reply->width,
1098                                            buffers_reply->height,
1099                                            format,
1100                                            buffers[0].name,
1101                                            stride,
1102                                            dri2_img);
1103
1104    free(buffers_reply);
1105    free(geometry_reply);
1106
1107    return &dri2_img->base;
1108 }
1109
1110 static _EGLImage *
1111 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1112                           _EGLContext *ctx, EGLenum target,
1113                           EGLClientBuffer buffer, const EGLint *attr_list)
1114 {
1115    (void) drv;
1116
1117    switch (target) {
1118    case EGL_NATIVE_PIXMAP_KHR:
1119       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1120    default:
1121       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1122    }
1123 }
1124
1125 static EGLBoolean
1126 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1127                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1128                          EGLuint64KHR *sbc)
1129 {
1130    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1131    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1132    xcb_dri2_get_msc_cookie_t cookie;
1133    xcb_dri2_get_msc_reply_t *reply;
1134
1135    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1136    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1137
1138    if (!reply)
1139       return _eglError(EGL_BAD_ACCESS, __func__);
1140
1141    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1142    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1143    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1144    free(reply);
1145
1146    return EGL_TRUE;
1147 }
1148
1149 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1150    .authenticate = NULL,
1151    .create_window_surface = dri2_x11_create_window_surface,
1152    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1153    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1154    .destroy_surface = dri2_x11_destroy_surface,
1155    .create_image = dri2_create_image_khr,
1156    .swap_buffers = dri2_x11_swap_buffers,
1157    .set_damage_region = dri2_fallback_set_damage_region,
1158    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1159    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1160    .copy_buffers = dri2_x11_copy_buffers,
1161    .query_buffer_age = dri2_fallback_query_buffer_age,
1162    .query_surface = dri2_query_surface,
1163    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1164    .get_sync_values = dri2_fallback_get_sync_values,
1165    .get_dri_drawable = dri2_surface_get_dri_drawable,
1166 };
1167
1168 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1169    .authenticate = dri2_x11_authenticate,
1170    .create_window_surface = dri2_x11_create_window_surface,
1171    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1172    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1173    .destroy_surface = dri2_x11_destroy_surface,
1174    .create_image = dri2_x11_create_image_khr,
1175    .swap_interval = dri2_x11_swap_interval,
1176    .swap_buffers = dri2_x11_swap_buffers,
1177    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1178    .swap_buffers_region = dri2_x11_swap_buffers_region,
1179    .set_damage_region = dri2_fallback_set_damage_region,
1180    .post_sub_buffer = dri2_x11_post_sub_buffer,
1181    .copy_buffers = dri2_x11_copy_buffers,
1182    .query_buffer_age = dri2_fallback_query_buffer_age,
1183    .query_surface = dri2_query_surface,
1184    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1185    .get_sync_values = dri2_x11_get_sync_values,
1186    .get_dri_drawable = dri2_surface_get_dri_drawable,
1187 };
1188
1189 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1190    .base = { __DRI_SWRAST_LOADER, 1 },
1191
1192    .getDrawableInfo = swrastGetDrawableInfo,
1193    .putImage        = swrastPutImage,
1194    .getImage        = swrastGetImage,
1195 };
1196
1197 static const __DRIextension *swrast_loader_extensions[] = {
1198    &swrast_loader_extension.base,
1199    &image_lookup_extension.base,
1200    NULL,
1201 };
1202
1203 static EGLBoolean
1204 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1205                         struct dri2_egl_display *dri2_dpy)
1206 {
1207    xcb_screen_iterator_t s;
1208    int screen = (uintptr_t)disp->Options.Platform;
1209    const char *msg;
1210
1211    disp->DriverData = (void *) dri2_dpy;
1212    if (disp->PlatformDisplay == NULL) {
1213       dri2_dpy->conn = xcb_connect(NULL, &screen);
1214       dri2_dpy->own_device = true;
1215    } else {
1216       Display *dpy = disp->PlatformDisplay;
1217
1218       dri2_dpy->conn = XGetXCBConnection(dpy);
1219       screen = DefaultScreen(dpy);
1220    }
1221
1222    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1223       msg = "xcb_connect failed";
1224       goto disconnect;
1225    }
1226
1227    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1228    dri2_dpy->screen = get_xcb_screen(s, screen);
1229    if (!dri2_dpy->screen) {
1230       msg = "failed to get xcb screen";
1231       goto disconnect;
1232    }
1233
1234    return EGL_TRUE;
1235 disconnect:
1236    if (disp->PlatformDisplay == NULL)
1237       xcb_disconnect(dri2_dpy->conn);
1238
1239    return _eglError(EGL_BAD_ALLOC, msg);
1240 }
1241
1242 static EGLBoolean
1243 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1244 {
1245    struct dri2_egl_display *dri2_dpy;
1246
1247    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1248    if (!dri2_dpy)
1249       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1250
1251    dri2_dpy->fd = -1;
1252    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1253       goto cleanup;
1254
1255    /*
1256     * Every hardware driver_name is set using strdup. Doing the same in
1257     * here will allow is to simply free the memory at dri2_terminate().
1258     */
1259    dri2_dpy->driver_name = strdup("swrast");
1260    if (!dri2_load_driver_swrast(disp))
1261       goto cleanup;
1262
1263    dri2_dpy->loader_extensions = swrast_loader_extensions;
1264
1265    if (!dri2_create_screen(disp))
1266       goto cleanup;
1267
1268    if (!dri2_setup_extensions(disp))
1269       goto cleanup;
1270
1271    dri2_setup_screen(disp);
1272
1273    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1274       goto cleanup;
1275
1276    /* Fill vtbl last to prevent accidentally calling virtual function during
1277     * initialization.
1278     */
1279    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1280
1281    return EGL_TRUE;
1282
1283  cleanup:
1284    dri2_display_destroy(disp);
1285    return EGL_FALSE;
1286 }
1287
1288 static void
1289 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1290 {
1291    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1292    int arbitrary_max_interval = 1000;
1293
1294    /* default behavior for no SwapBuffers support: no vblank syncing
1295     * either.
1296     */
1297    dri2_dpy->min_swap_interval = 0;
1298    dri2_dpy->max_swap_interval = 0;
1299    dri2_dpy->default_swap_interval = 0;
1300
1301    if (!dri2_dpy->swap_available)
1302       return;
1303
1304    /* If we do have swapbuffers, then we can support pretty much any swap
1305     * interval.
1306     */
1307    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1308 }
1309
1310 #ifdef HAVE_DRI3
1311
1312 static const __DRIextension *dri3_image_loader_extensions[] = {
1313    &dri3_image_loader_extension.base,
1314    &image_lookup_extension.base,
1315    &use_invalidate.base,
1316    &background_callable_extension.base,
1317    NULL,
1318 };
1319
1320 static EGLBoolean
1321 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1322 {
1323    struct dri2_egl_display *dri2_dpy;
1324
1325    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1326    if (!dri2_dpy)
1327       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1328
1329    dri2_dpy->fd = -1;
1330    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1331       goto cleanup;
1332
1333    if (!dri3_x11_connect(dri2_dpy))
1334       goto cleanup;
1335
1336    if (!dri2_load_driver_dri3(disp))
1337       goto cleanup;
1338
1339    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1340
1341    dri2_dpy->swap_available = true;
1342    dri2_dpy->invalidate_available = true;
1343
1344    if (!dri2_create_screen(disp))
1345       goto cleanup;
1346
1347    if (!dri2_setup_extensions(disp))
1348       goto cleanup;
1349
1350    dri2_setup_screen(disp);
1351
1352    dri2_x11_setup_swap_interval(disp);
1353
1354    if (!dri2_dpy->is_different_gpu)
1355       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1356    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1357    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1358    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1359
1360    dri2_set_WL_bind_wayland_display(drv, disp);
1361
1362    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1363       goto cleanup;
1364
1365    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1366    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1367    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1368    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1369    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1370    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1371
1372    /* Fill vtbl last to prevent accidentally calling virtual function during
1373     * initialization.
1374     */
1375    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1376
1377    _eglLog(_EGL_INFO, "Using DRI3");
1378
1379    return EGL_TRUE;
1380
1381  cleanup:
1382    dri2_display_destroy(disp);
1383    return EGL_FALSE;
1384 }
1385 #endif
1386
1387 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1388    .base = { __DRI_DRI2_LOADER, 2 },
1389
1390    .getBuffers           = dri2_x11_get_buffers,
1391    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1392    .getBuffersWithFormat = NULL,
1393 };
1394
1395 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1396    .base = { __DRI_DRI2_LOADER, 3 },
1397
1398    .getBuffers           = dri2_x11_get_buffers,
1399    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1400    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1401 };
1402
1403 static const __DRIextension *dri2_loader_extensions_old[] = {
1404    &dri2_loader_extension_old.base,
1405    &image_lookup_extension.base,
1406    &background_callable_extension.base,
1407    NULL,
1408 };
1409
1410 static const __DRIextension *dri2_loader_extensions[] = {
1411    &dri2_loader_extension.base,
1412    &image_lookup_extension.base,
1413    &use_invalidate.base,
1414    &background_callable_extension.base,
1415    NULL,
1416 };
1417
1418 static EGLBoolean
1419 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1420 {
1421    struct dri2_egl_display *dri2_dpy;
1422
1423    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1424    if (!dri2_dpy)
1425       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1426
1427    dri2_dpy->fd = -1;
1428    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1429       goto cleanup;
1430
1431    if (!dri2_x11_connect(dri2_dpy))
1432       goto cleanup;
1433
1434    if (!dri2_load_driver(disp))
1435       goto cleanup;
1436
1437    if (dri2_dpy->dri2_minor >= 1)
1438       dri2_dpy->loader_extensions = dri2_loader_extensions;
1439    else
1440       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1441
1442    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1443    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1444
1445    if (!dri2_create_screen(disp))
1446       goto cleanup;
1447
1448    if (!dri2_setup_extensions(disp))
1449       goto cleanup;
1450
1451    dri2_setup_screen(disp);
1452
1453    dri2_x11_setup_swap_interval(disp);
1454
1455    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1456    disp->Extensions.NOK_swap_region = EGL_TRUE;
1457    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1458    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1459    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1460
1461    dri2_set_WL_bind_wayland_display(drv, disp);
1462
1463    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1464       goto cleanup;
1465
1466    /* Fill vtbl last to prevent accidentally calling virtual function during
1467     * initialization.
1468     */
1469    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1470
1471    _eglLog(_EGL_INFO, "Using DRI2");
1472
1473    return EGL_TRUE;
1474
1475  cleanup:
1476    dri2_display_destroy(disp);
1477    return EGL_FALSE;
1478 }
1479
1480 EGLBoolean
1481 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1482 {
1483    EGLBoolean initialized = EGL_FALSE;
1484
1485    if (!disp->Options.ForceSoftware) {
1486 #ifdef HAVE_DRI3
1487       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1488          initialized = dri2_initialize_x11_dri3(drv, disp);
1489 #endif
1490
1491       if (!initialized)
1492          initialized = dri2_initialize_x11_dri2(drv, disp);
1493    }
1494
1495    if (!initialized)
1496       initialized = dri2_initialize_x11_swrast(drv, disp);
1497
1498    return initialized;
1499 }
1500
1501 void
1502 dri2_teardown_x11(struct dri2_egl_display *dri2_dpy)
1503 {
1504    if (dri2_dpy->own_device)
1505       xcb_disconnect(dri2_dpy->conn);
1506 }