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          if (type == EGL_WINDOW_BIT)
 251             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 252          else
 253             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 254          goto cleanup_surf;
 255       }
 256       dri2_surf->drawable = drawable;
 257    }
 258
 259    config = dri2_get_dri_config(dri2_conf, type,
 260                                 dri2_surf->base.GLColorspace);
 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                                   XCB_WINDOW_NONE, 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    free(surf);
 408
 409    return EGL_TRUE;
 410 }
 411
 412 /**
 413  * Function utilizes swrastGetDrawableInfo to get surface
 414  * geometry from x server and calls default query surface
 415  * implementation that returns the updated values.
 416  *
 417  * In case of errors we still return values that we currently
 418  * have.
 419  */
 420 static EGLBoolean
 421 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 422                    _EGLSurface *surf, EGLint attribute,
 423                    EGLint *value)
 424 {
 425    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 426    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 427    int x, y, w, h;
 428
 429    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 430
 431    switch (attribute) {
 432    case EGL_WIDTH:
 433    case EGL_HEIGHT:
 434       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 435          surf->Width = w;
 436          surf->Height = h;
 437       }
 438       break;
 439    default:
 440       break;
 441    }
 442    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 443 }
 444
 445 /**
 446  * Process list of buffer received from the server
 447  *
 448  * Processes the list of buffers received in a reply from the server to either
 449  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 450  */
 451 static void
 452 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 453                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 454 {
 455    struct dri2_egl_display *dri2_dpy =
 456       dri2_egl_display(dri2_surf->base.Resource.Display);
 457    xcb_rectangle_t rectangle;
 458
 459    dri2_surf->have_fake_front = false;
 460
 461    /* This assumes the DRI2 buffer attachment tokens matches the
 462     * __DRIbuffer tokens. */
 463    for (unsigned i = 0; i < count; i++) {
 464       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 465       dri2_surf->buffers[i].name = buffers[i].name;
 466       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 467       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 468       dri2_surf->buffers[i].flags = buffers[i].flags;
 469
 470       /* We only use the DRI drivers single buffer configs.  This
 471        * means that if we try to render to a window, DRI2 will give us
 472        * the fake front buffer, which we'll use as a back buffer.
 473        * Note that EGL doesn't require that several clients rendering
 474        * to the same window must see the same aux buffers. */
 475       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 476          dri2_surf->have_fake_front = true;
 477    }
 478
 479    if (dri2_surf->region != XCB_NONE)
 480       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 481
 482    rectangle.x = 0;
 483    rectangle.y = 0;
 484    rectangle.width = dri2_surf->base.Width;
 485    rectangle.height = dri2_surf->base.Height;
 486    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 487    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 488 }
 489
 490 static __DRIbuffer *
 491 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 492                      int *width, int *height,
 493                      unsigned int *attachments, int count,
 494                      int *out_count, void *loaderPrivate)
 495 {
 496    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 497    struct dri2_egl_display *dri2_dpy =
 498       dri2_egl_display(dri2_surf->base.Resource.Display);
 499    xcb_dri2_dri2_buffer_t *buffers;
 500    xcb_dri2_get_buffers_reply_t *reply;
 501    xcb_dri2_get_buffers_cookie_t cookie;
 502
 503    (void) driDrawable;
 504
 505    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 506                                             dri2_surf->drawable,
 507                                             count, count, attachments);
 508    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 509    if (reply == NULL)
 510       return NULL;
 511    buffers = xcb_dri2_get_buffers_buffers (reply);
 512    if (buffers == NULL)
 513       return NULL;
 514
 515    *out_count = reply->count;
 516    dri2_surf->base.Width = *width = reply->width;
 517    dri2_surf->base.Height = *height = reply->height;
 518    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 519
 520    free(reply);
 521
 522    return dri2_surf->buffers;
 523 }
 524
 525 static __DRIbuffer *
 526 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 527                                  int *width, int *height,
 528                                  unsigned int *attachments, int count,
 529                                  int *out_count, void *loaderPrivate)
 530 {
 531    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 532    struct dri2_egl_display *dri2_dpy =
 533       dri2_egl_display(dri2_surf->base.Resource.Display);
 534    xcb_dri2_dri2_buffer_t *buffers;
 535    xcb_dri2_get_buffers_with_format_reply_t *reply;
 536    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 537    xcb_dri2_attach_format_t *format_attachments;
 538
 539    (void) driDrawable;
 540
 541    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 542    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 543                                                         dri2_surf->drawable,
 544                                                         count, count,
 545                                                         format_attachments);
 546
 547    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 548                                                    cookie, NULL);
 549    if (reply == NULL)
 550       return NULL;
 551
 552    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 553    dri2_surf->base.Width = *width = reply->width;
 554    dri2_surf->base.Height = *height = reply->height;
 555    *out_count = reply->count;
 556    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 557
 558    free(reply);
 559
 560    return dri2_surf->buffers;
 561 }
 562
 563 static void
 564 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 565 {
 566    (void) driDrawable;
 567
 568    /* FIXME: Does EGL support front buffer rendering at all? */
 569
 570 #if 0
 571    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 572
 573    dri2WaitGL(dri2_surf);
 574 #else
 575    (void) loaderPrivate;
 576 #endif
 577 }
 578
 579 static int
 580 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 581 {
 582    xcb_dri2_authenticate_reply_t *authenticate;
 583    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 584    int ret = 0;
 585
 586    authenticate_cookie =
 587       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 588    authenticate =
 589       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 590
 591    if (authenticate == NULL || !authenticate->authenticated)
 592       ret = -1;
 593
 594    free(authenticate);
 595
 596    return ret;
 597 }
 598
 599 static EGLBoolean
 600 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 601 {
 602 #ifdef HAVE_LIBDRM
 603    drm_magic_t magic;
 604
 605    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 606       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 607       return EGL_FALSE;
 608    }
 609
 610    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 611       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 612       return EGL_FALSE;
 613    }
 614 #endif
 615    return EGL_TRUE;
 616 }
 617
 618 static EGLBoolean
 619 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 620 {
 621    xcb_xfixes_query_version_reply_t *xfixes_query;
 622    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 623    xcb_dri2_query_version_reply_t *dri2_query;
 624    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 625    xcb_dri2_connect_reply_t *connect;
 626    xcb_dri2_connect_cookie_t connect_cookie;
 627    xcb_generic_error_t *error;
 628    char *driver_name, *loader_driver_name, *device_name;
 629    const xcb_query_extension_reply_t *extension;
 630
 631    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 632    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 633
 634    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 635    if (!(extension && extension->present))
 636       return EGL_FALSE;
 637
 638    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 639    if (!(extension && extension->present))
 640       return EGL_FALSE;
 641
 642    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 643                                                   XCB_XFIXES_MAJOR_VERSION,
 644                                                   XCB_XFIXES_MINOR_VERSION);
 645
 646    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 647                                                XCB_DRI2_MAJOR_VERSION,
 648                                                XCB_DRI2_MINOR_VERSION);
 649
 650    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 651                                    XCB_DRI2_DRIVER_TYPE_DRI);
 652
 653    xfixes_query =
 654       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 655                                       xfixes_query_cookie, &error);
 656    if (xfixes_query == NULL ||
 657        error != NULL || xfixes_query->major_version < 2) {
 658       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 659       free(error);
 660       free(xfixes_query);
 661       return EGL_FALSE;
 662    }
 663    free(xfixes_query);
 664
 665    dri2_query =
 666       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 667    if (dri2_query == NULL || error != NULL) {
 668       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 669       free(error);
 670       return EGL_FALSE;
 671    }
 672    dri2_dpy->dri2_major = dri2_query->major_version;
 673    dri2_dpy->dri2_minor = dri2_query->minor_version;
 674    free(dri2_query);
 675
 676    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 677    if (connect == NULL ||
 678        connect->driver_name_length + connect->device_name_length == 0) {
 679       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 680       return EGL_FALSE;
 681    }
 682
 683    device_name = xcb_dri2_connect_device_name (connect);
 684
 685    dri2_dpy->fd = loader_open_device(device_name);
 686    if (dri2_dpy->fd == -1) {
 687       _eglLog(_EGL_WARNING,
 688               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 689       free(connect);
 690       return EGL_FALSE;
 691    }
 692
 693    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 694       close(dri2_dpy->fd);
 695       free(connect);
 696       return EGL_FALSE;
 697    }
 698
 699    driver_name = xcb_dri2_connect_driver_name (connect);
 700
 701    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 702     * Otherwise, default to the server's value.
 703     */
 704    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 705    if (loader_driver_name) {
 706       dri2_dpy->driver_name = loader_driver_name;
 707    } else {
 708       dri2_dpy->driver_name =
 709          strndup(driver_name,
 710                  xcb_dri2_connect_driver_name_length(connect));
 711    }
 712
 713    if (dri2_dpy->driver_name == NULL) {
 714       close(dri2_dpy->fd);
 715       free(dri2_dpy->driver_name);
 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              * Otherwise it will only match a 32-bit RGBA visual.  On a
 795              * composited window manager on X11, this will make all of the
 796              * EGLConfigs with destination alpha get blended by the
 797              * compositor.  This is probably not what the application
 798              * wants... especially on drivers that only have 32-bit RGBA
 799              * EGLConfigs! */
 800             if (d.data->depth == 24) {
 801                rgba_masks[3] =
 802                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 803                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 804                                            surface_type, config_attrs,
 805                                            rgba_masks);
 806                if (dri2_conf)
 807                   if (dri2_conf->base.ConfigID == config_count + 1)
 808                      config_count++;
 809             }
 810          }
 811       }
 812
 813       xcb_depth_next(&d);
 814    }
 815
 816    if (!config_count) {
 817       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 818       return EGL_FALSE;
 819    }
 820
 821    return EGL_TRUE;
 822 }
 823
 824 static EGLBoolean
 825 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 826                  _EGLSurface *draw, xcb_xfixes_region_t region)
 827 {
 828    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 829    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 830    enum xcb_dri2_attachment_t render_attachment;
 831    xcb_dri2_copy_region_cookie_t cookie;
 832
 833    /* No-op for a pixmap or pbuffer surface */
 834    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 835       return EGL_TRUE;
 836
 837    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 838
 839    if (dri2_surf->have_fake_front)
 840       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 841    else
 842       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 843
 844    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 845                                            dri2_surf->drawable,
 846                                            region,
 847                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 848                                            render_attachment);
 849    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 850
 851    return EGL_TRUE;
 852 }
 853
 854 static int64_t
 855 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 856                           int64_t msc, int64_t divisor, int64_t remainder)
 857 {
 858    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 859    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 860    uint32_t msc_hi = msc >> 32;
 861    uint32_t msc_lo = msc & 0xffffffff;
 862    uint32_t divisor_hi = divisor >> 32;
 863    uint32_t divisor_lo = divisor & 0xffffffff;
 864    uint32_t remainder_hi = remainder >> 32;
 865    uint32_t remainder_lo = remainder & 0xffffffff;
 866    xcb_dri2_swap_buffers_cookie_t cookie;
 867    xcb_dri2_swap_buffers_reply_t *reply;
 868    int64_t swap_count = -1;
 869
 870    /* No-op for a pixmap or pbuffer surface */
 871    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 872       return 0;
 873
 874    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 875       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 876
 877    dri2_flush_drawable_for_swapbuffers(disp, draw);
 878
 879    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 880                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 881
 882    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 883
 884    if (reply) {
 885       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 886       free(reply);
 887    }
 888
 889    /* Since we aren't watching for the server's invalidate events like we're
 890     * supposed to (due to XCB providing no mechanism for filtering the events
 891     * the way xlib does), and SwapBuffers is a common cause of invalidate
 892     * events, just shove one down to the driver, even though we haven't told
 893     * the driver that we're the kind of loader that provides reliable
 894     * invalidate events.  This causes the driver to request buffers again at
 895     * its next draw, so that we get the correct buffers if a pageflip
 896     * happened.  The driver should still be using the viewport hack to catch
 897     * window resizes.
 898     */
 899    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 900       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 901
 902    return swap_count;
 903 }
 904
 905 static EGLBoolean
 906 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 907 {
 908    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 909    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 910
 911    if (!dri2_dpy->flush) {
 912       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 913       return EGL_TRUE;
 914    }
 915
 916    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 917       /* Swap failed with a window drawable. */
 918       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 919    }
 920    return EGL_TRUE;
 921 }
 922
 923 static EGLBoolean
 924 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 925                              _EGLSurface *draw,
 926                              EGLint numRects, const EGLint *rects)
 927 {
 928    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 929    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 930    EGLBoolean ret;
 931    xcb_xfixes_region_t region;
 932    xcb_rectangle_t rectangles[16];
 933
 934    if (numRects > (int)ARRAY_SIZE(rectangles))
 935       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 936
 937    for (int i = 0; i < numRects; i++) {
 938       rectangles[i].x = rects[i * 4];
 939       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 940       rectangles[i].width = rects[i * 4 + 2];
 941       rectangles[i].height = rects[i * 4 + 3];
 942    }
 943
 944    region = xcb_generate_id(dri2_dpy->conn);
 945    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 946    ret = dri2_copy_region(drv, disp, draw, region);
 947    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 948
 949    return ret;
 950 }
 951
 952 static EGLBoolean
 953 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 954                      EGLint x, EGLint y, EGLint width, EGLint height)
 955 {
 956    const EGLint rect[4] = { x, y, width, height };
 957
 958    if (x < 0 || y < 0 || width < 0 || height < 0)
 959       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 960
 961    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 962 }
 963
 964 static EGLBoolean
 965 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 966                        EGLint interval)
 967 {
 968    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 969    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 970
 971    if (dri2_dpy->swap_available)
 972       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 973
 974    return EGL_TRUE;
 975 }
 976
 977 static EGLBoolean
 978 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 979                       void *native_pixmap_target)
 980 {
 981    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 982    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 983    xcb_gcontext_t gc;
 984    xcb_pixmap_t target;
 985
 986    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 987    target = (uintptr_t) native_pixmap_target;
 988
 989    (void) drv;
 990
 991    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 992
 993    gc = xcb_generate_id(dri2_dpy->conn);
 994    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 995    xcb_copy_area(dri2_dpy->conn,
 996                   dri2_surf->drawable,
 997                   target,
 998                   gc,
 999                   0, 0,
1000                   0, 0,
1001                   dri2_surf->base.Width,
1002                   dri2_surf->base.Height);
1003    xcb_free_gc(dri2_dpy->conn, gc);
1004
1005    return EGL_TRUE;
1006 }
1007
1008 static _EGLImage *
1009 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1010                              EGLClientBuffer buffer, const EGLint *attr_list)
1011 {
1012    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1013    struct dri2_egl_image *dri2_img;
1014    unsigned int attachments[1];
1015    xcb_drawable_t drawable;
1016    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1017    xcb_dri2_get_buffers_reply_t *buffers_reply;
1018    xcb_dri2_dri2_buffer_t *buffers;
1019    xcb_get_geometry_cookie_t geometry_cookie;
1020    xcb_get_geometry_reply_t *geometry_reply;
1021    xcb_generic_error_t *error;
1022    int stride, format;
1023
1024    (void) ctx;
1025
1026    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1027    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1028    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1029    buffers_cookie =
1030       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1031                                       drawable, 1, 1, attachments);
1032    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1033    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1034                                                buffers_cookie, NULL);
1035    if (buffers_reply == NULL)
1036      return NULL;
1037
1038    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1039    if (buffers == NULL) {
1040       return NULL;
1041    }
1042
1043    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1044                                             geometry_cookie, &error);
1045    if (geometry_reply == NULL || error != NULL) {
1046       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1047       free(error);
1048       free(buffers_reply);
1049       return NULL;
1050    }
1051
1052    switch (geometry_reply->depth) {
1053    case 16:
1054       format = __DRI_IMAGE_FORMAT_RGB565;
1055       break;
1056    case 24:
1057       format = __DRI_IMAGE_FORMAT_XRGB8888;
1058       break;
1059    case 32:
1060       format = __DRI_IMAGE_FORMAT_ARGB8888;
1061       break;
1062    default:
1063       _eglError(EGL_BAD_PARAMETER,
1064                 "dri2_create_image_khr: unsupported pixmap depth");
1065       free(buffers_reply);
1066       free(geometry_reply);
1067       return NULL;
1068    }
1069
1070    dri2_img = malloc(sizeof *dri2_img);
1071    if (!dri2_img) {
1072       free(buffers_reply);
1073       free(geometry_reply);
1074       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1075       return EGL_NO_IMAGE_KHR;
1076    }
1077
1078    _eglInitImage(&dri2_img->base, disp);
1079
1080    stride = buffers[0].pitch / buffers[0].cpp;
1081    dri2_img->dri_image =
1082       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1083                                            buffers_reply->width,
1084                                            buffers_reply->height,
1085                                            format,
1086                                            buffers[0].name,
1087                                            stride,
1088                                            dri2_img);
1089
1090    free(buffers_reply);
1091    free(geometry_reply);
1092
1093    return &dri2_img->base;
1094 }
1095
1096 static _EGLImage *
1097 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1098                           _EGLContext *ctx, EGLenum target,
1099                           EGLClientBuffer buffer, const EGLint *attr_list)
1100 {
1101    (void) drv;
1102
1103    switch (target) {
1104    case EGL_NATIVE_PIXMAP_KHR:
1105       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1106    default:
1107       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1108    }
1109 }
1110
1111 static EGLBoolean
1112 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1113                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1114                          EGLuint64KHR *sbc)
1115 {
1116    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1117    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1118    xcb_dri2_get_msc_cookie_t cookie;
1119    xcb_dri2_get_msc_reply_t *reply;
1120
1121    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1122    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1123
1124    if (!reply)
1125       return _eglError(EGL_BAD_ACCESS, __func__);
1126
1127    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1128    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1129    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1130    free(reply);
1131
1132    return EGL_TRUE;
1133 }
1134
1135 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1136    .authenticate = NULL,
1137    .create_window_surface = dri2_x11_create_window_surface,
1138    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1139    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1140    .destroy_surface = dri2_x11_destroy_surface,
1141    .create_image = dri2_create_image_khr,
1142    .swap_interval = dri2_fallback_swap_interval,
1143    .swap_buffers = dri2_x11_swap_buffers,
1144    .set_damage_region = dri2_fallback_set_damage_region,
1145    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1146    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1147    .copy_buffers = dri2_x11_copy_buffers,
1148    .query_buffer_age = dri2_fallback_query_buffer_age,
1149    .query_surface = dri2_query_surface,
1150    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1151    .get_sync_values = dri2_fallback_get_sync_values,
1152    .get_dri_drawable = dri2_surface_get_dri_drawable,
1153 };
1154
1155 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1156    .authenticate = dri2_x11_authenticate,
1157    .create_window_surface = dri2_x11_create_window_surface,
1158    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1159    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1160    .destroy_surface = dri2_x11_destroy_surface,
1161    .create_image = dri2_x11_create_image_khr,
1162    .swap_interval = dri2_x11_swap_interval,
1163    .swap_buffers = dri2_x11_swap_buffers,
1164    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1165    .swap_buffers_region = dri2_x11_swap_buffers_region,
1166    .set_damage_region = dri2_fallback_set_damage_region,
1167    .post_sub_buffer = dri2_x11_post_sub_buffer,
1168    .copy_buffers = dri2_x11_copy_buffers,
1169    .query_buffer_age = dri2_fallback_query_buffer_age,
1170    .query_surface = dri2_query_surface,
1171    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1172    .get_sync_values = dri2_x11_get_sync_values,
1173    .get_dri_drawable = dri2_surface_get_dri_drawable,
1174 };
1175
1176 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1177    .base = { __DRI_SWRAST_LOADER, 1 },
1178
1179    .getDrawableInfo = swrastGetDrawableInfo,
1180    .putImage        = swrastPutImage,
1181    .getImage        = swrastGetImage,
1182 };
1183
1184 static const __DRIextension *swrast_loader_extensions[] = {
1185    &swrast_loader_extension.base,
1186    &image_lookup_extension.base,
1187    NULL,
1188 };
1189
1190 static EGLBoolean
1191 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1192                         struct dri2_egl_display *dri2_dpy)
1193 {
1194    xcb_screen_iterator_t s;
1195    int screen = (uintptr_t)disp->Options.Platform;
1196    const char *msg;
1197
1198    disp->DriverData = (void *) dri2_dpy;
1199    if (disp->PlatformDisplay == NULL) {
1200       dri2_dpy->conn = xcb_connect(NULL, &screen);
1201       dri2_dpy->own_device = true;
1202    } else {
1203       Display *dpy = disp->PlatformDisplay;
1204
1205       dri2_dpy->conn = XGetXCBConnection(dpy);
1206       screen = DefaultScreen(dpy);
1207    }
1208
1209    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1210       msg = "xcb_connect failed";
1211       goto disconnect;
1212    }
1213
1214    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1215    dri2_dpy->screen = get_xcb_screen(s, screen);
1216    if (!dri2_dpy->screen) {
1217       msg = "failed to get xcb screen";
1218       goto disconnect;
1219    }
1220
1221    return EGL_TRUE;
1222 disconnect:
1223    if (disp->PlatformDisplay == NULL)
1224       xcb_disconnect(dri2_dpy->conn);
1225
1226    return _eglError(EGL_BAD_ALLOC, msg);
1227 }
1228
1229 static EGLBoolean
1230 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1231 {
1232    struct dri2_egl_display *dri2_dpy;
1233
1234    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1235    if (!dri2_dpy)
1236       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1237
1238    dri2_dpy->fd = -1;
1239    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1240       goto cleanup;
1241
1242    /*
1243     * Every hardware driver_name is set using strdup. Doing the same in
1244     * here will allow is to simply free the memory at dri2_terminate().
1245     */
1246    dri2_dpy->driver_name = strdup("swrast");
1247    if (!dri2_load_driver_swrast(disp))
1248       goto cleanup;
1249
1250    dri2_dpy->loader_extensions = swrast_loader_extensions;
1251
1252    if (!dri2_create_screen(disp))
1253       goto cleanup;
1254
1255    if (!dri2_setup_extensions(disp))
1256       goto cleanup;
1257
1258    dri2_setup_screen(disp);
1259
1260    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1261       goto cleanup;
1262
1263    /* Fill vtbl last to prevent accidentally calling virtual function during
1264     * initialization.
1265     */
1266    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1267
1268    return EGL_TRUE;
1269
1270  cleanup:
1271    dri2_display_destroy(disp);
1272    return EGL_FALSE;
1273 }
1274
1275 static void
1276 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1277 {
1278    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1279    int arbitrary_max_interval = 1000;
1280
1281    /* default behavior for no SwapBuffers support: no vblank syncing
1282     * either.
1283     */
1284    dri2_dpy->min_swap_interval = 0;
1285    dri2_dpy->max_swap_interval = 0;
1286
1287    if (!dri2_dpy->swap_available)
1288       return;
1289
1290    /* If we do have swapbuffers, then we can support pretty much any swap
1291     * interval.
1292     */
1293    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1294 }
1295
1296 #ifdef HAVE_DRI3
1297
1298 static const __DRIextension *dri3_image_loader_extensions[] = {
1299    &dri3_image_loader_extension.base,
1300    &image_lookup_extension.base,
1301    &use_invalidate.base,
1302    NULL,
1303 };
1304
1305 static EGLBoolean
1306 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1307 {
1308    struct dri2_egl_display *dri2_dpy;
1309
1310    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1311    if (!dri2_dpy)
1312       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1313
1314    dri2_dpy->fd = -1;
1315    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1316       goto cleanup;
1317
1318    if (!dri3_x11_connect(dri2_dpy))
1319       goto cleanup;
1320
1321    if (!dri2_load_driver_dri3(disp))
1322       goto cleanup;
1323
1324    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1325
1326    dri2_dpy->swap_available = true;
1327    dri2_dpy->invalidate_available = true;
1328
1329    if (!dri2_create_screen(disp))
1330       goto cleanup;
1331
1332    if (!dri2_setup_extensions(disp))
1333       goto cleanup;
1334
1335    dri2_setup_screen(disp);
1336
1337    dri2_x11_setup_swap_interval(disp);
1338
1339    if (!dri2_dpy->is_different_gpu)
1340       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1341    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1342    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1343    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1344
1345    dri2_set_WL_bind_wayland_display(drv, disp);
1346
1347    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1348       goto cleanup;
1349
1350    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1351    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1352    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1353    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1354    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1355    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1356
1357    /* Fill vtbl last to prevent accidentally calling virtual function during
1358     * initialization.
1359     */
1360    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1361
1362    _eglLog(_EGL_INFO, "Using DRI3");
1363
1364    return EGL_TRUE;
1365
1366  cleanup:
1367    dri2_display_destroy(disp);
1368    return EGL_FALSE;
1369 }
1370 #endif
1371
1372 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1373    .base = { __DRI_DRI2_LOADER, 2 },
1374
1375    .getBuffers           = dri2_x11_get_buffers,
1376    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1377    .getBuffersWithFormat = NULL,
1378 };
1379
1380 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1381    .base = { __DRI_DRI2_LOADER, 3 },
1382
1383    .getBuffers           = dri2_x11_get_buffers,
1384    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1385    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1386 };
1387
1388 static const __DRIextension *dri2_loader_extensions_old[] = {
1389    &dri2_loader_extension_old.base,
1390    &image_lookup_extension.base,
1391    &background_callable_extension.base,
1392    NULL,
1393 };
1394
1395 static const __DRIextension *dri2_loader_extensions[] = {
1396    &dri2_loader_extension.base,
1397    &image_lookup_extension.base,
1398    &background_callable_extension.base,
1399    NULL,
1400 };
1401
1402 static EGLBoolean
1403 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1404 {
1405    struct dri2_egl_display *dri2_dpy;
1406
1407    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1408    if (!dri2_dpy)
1409       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1410
1411    dri2_dpy->fd = -1;
1412    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1413       goto cleanup;
1414
1415    if (!dri2_x11_connect(dri2_dpy))
1416       goto cleanup;
1417
1418    if (!dri2_load_driver(disp))
1419       goto cleanup;
1420
1421    if (dri2_dpy->dri2_minor >= 1)
1422       dri2_dpy->loader_extensions = dri2_loader_extensions;
1423    else
1424       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1425
1426    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1427    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1428
1429    if (!dri2_create_screen(disp))
1430       goto cleanup;
1431
1432    if (!dri2_setup_extensions(disp))
1433       goto cleanup;
1434
1435    dri2_setup_screen(disp);
1436
1437    dri2_x11_setup_swap_interval(disp);
1438
1439    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1440    disp->Extensions.NOK_swap_region = EGL_TRUE;
1441    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1442    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1443    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1444
1445    dri2_set_WL_bind_wayland_display(drv, disp);
1446
1447    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1448       goto cleanup;
1449
1450    /* Fill vtbl last to prevent accidentally calling virtual function during
1451     * initialization.
1452     */
1453    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1454
1455    _eglLog(_EGL_INFO, "Using DRI2");
1456
1457    return EGL_TRUE;
1458
1459  cleanup:
1460    dri2_display_destroy(disp);
1461    return EGL_FALSE;
1462 }
1463
1464 EGLBoolean
1465 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1466 {
1467    EGLBoolean initialized = EGL_FALSE;
1468
1469    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1470 #ifdef HAVE_DRI3
1471       if (!getenv("LIBGL_DRI3_DISABLE"))
1472          initialized = dri2_initialize_x11_dri3(drv, disp);
1473 #endif
1474
1475       if (!initialized)
1476          initialized = dri2_initialize_x11_dri2(drv, disp);
1477    }
1478
1479    if (!initialized)
1480       initialized = dri2_initialize_x11_swrast(drv, disp);
1481
1482    return initialized;
1483 }
1484