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
  44 #include "egl_dri2.h"
  45 #include "egl_dri2_fallbacks.h"
  46 #include "loader.h"
  47
  48 #ifdef HAVE_DRI3
  49 #include "platform_x11_dri3.h"
  50 #endif
  51
  52 static EGLBoolean
  53 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  54                        EGLint interval);
  55
  56 static void
  57 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  58                      struct dri2_egl_surface * dri2_surf)
  59 {
  60    uint32_t           mask;
  61    const uint32_t     function = GXcopy;
  62    uint32_t           valgc[2];
  63
  64    /* create GC's */
  65    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  66    mask = XCB_GC_FUNCTION;
  67    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  68
  69    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  70    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  71    valgc[0] = function;
  72    valgc[1] = False;
  73    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  74    switch (dri2_surf->depth) {
  75       case 32:
  76       case 24:
  77          dri2_surf->bytes_per_pixel = 4;
  78          break;
  79       case 16:
  80          dri2_surf->bytes_per_pixel = 2;
  81          break;
  82       case 8:
  83          dri2_surf->bytes_per_pixel = 1;
  84          break;
  85       case 0:
  86          dri2_surf->bytes_per_pixel = 0;
  87          break;
  88       default:
  89          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  90    }
  91 }
  92
  93 static void
  94 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  95                       struct dri2_egl_surface * dri2_surf)
  96 {
  97    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  99 }
 100
 101 static void
 102 swrastGetDrawableInfo(__DRIdrawable * draw,
 103                       int *x, int *y, int *w, int *h,
 104                       void *loaderPrivate)
 105 {
 106    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 107    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 108
 109    xcb_get_geometry_cookie_t cookie;
 110    xcb_get_geometry_reply_t *reply;
 111    xcb_generic_error_t *error;
 112
 113    *w = *h = 0;
 114    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 115    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 116    if (reply == NULL)
 117       return;
 118
 119    if (error != NULL) {
 120       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 121       free(error);
 122    } else {
 123       *w = reply->width;
 124       *h = reply->height;
 125    }
 126    free(reply);
 127 }
 128
 129 static void
 130 swrastPutImage(__DRIdrawable * draw, int op,
 131                int x, int y, int w, int h,
 132                char *data, void *loaderPrivate)
 133 {
 134    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 135    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 136
 137    xcb_gcontext_t gc;
 138
 139    switch (op) {
 140    case __DRI_SWRAST_IMAGE_OP_DRAW:
 141       gc = dri2_surf->gc;
 142       break;
 143    case __DRI_SWRAST_IMAGE_OP_SWAP:
 144       gc = dri2_surf->swapgc;
 145       break;
 146    default:
 147       return;
 148    }
 149
 150    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 151                  gc, w, h, x, y, 0, dri2_surf->depth,
 152                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 153 }
 154
 155 static void
 156 swrastGetImage(__DRIdrawable * read,
 157                int x, int y, int w, int h,
 158                char *data, void *loaderPrivate)
 159 {
 160    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 161    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 162
 163    xcb_get_image_cookie_t cookie;
 164    xcb_get_image_reply_t *reply;
 165    xcb_generic_error_t *error;
 166
 167    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 168                            dri2_surf->drawable, x, y, w, h, ~0);
 169    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 170    if (reply == NULL)
 171       return;
 172
 173    if (error != NULL) {
 174       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 175       free(error);
 176    } else {
 177       uint32_t bytes = xcb_get_image_data_length(reply);
 178       uint8_t *idata = xcb_get_image_data(reply);
 179       memcpy(data, idata, bytes);
 180    }
 181    free(reply);
 182 }
 183
 184
 185 static xcb_screen_t *
 186 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 187 {
 188     for (; iter.rem; --screen, xcb_screen_next(&iter))
 189         if (screen == 0)
 190             return iter.data;
 191
 192     return NULL;
 193 }
 194
 195
 196 /**
 197  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 198  */
 199 static _EGLSurface *
 200 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 201                         _EGLConfig *conf, void *native_surface,
 202                         const EGLint *attrib_list)
 203 {
 204    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 205    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 206    struct dri2_egl_surface *dri2_surf;
 207    xcb_get_geometry_cookie_t cookie;
 208    xcb_get_geometry_reply_t *reply;
 209    xcb_generic_error_t *error;
 210    xcb_drawable_t drawable;
 211    const __DRIconfig *config;
 212
 213    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 214    drawable = (uintptr_t) native_surface;
 215
 216    (void) drv;
 217
 218    dri2_surf = malloc(sizeof *dri2_surf);
 219    if (!dri2_surf) {
 220       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 221       return NULL;
 222    }
 223
 224    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 225       goto cleanup_surf;
 226
 227    dri2_surf->region = XCB_NONE;
 228    if (type == EGL_PBUFFER_BIT) {
 229       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 230       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 231                        dri2_surf->drawable, dri2_dpy->screen->root,
 232                         dri2_surf->base.Width, dri2_surf->base.Height);
 233    } else {
 234       if (!drawable) {
 235          if (type == EGL_WINDOW_BIT)
 236             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 237          else
 238             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 239          goto cleanup_surf;
 240       }
 241       dri2_surf->drawable = drawable;
 242    }
 243
 244    config = dri2_get_dri_config(dri2_conf, type,
 245                                 dri2_surf->base.GLColorspace);
 246
 247    if (dri2_dpy->dri2) {
 248       dri2_surf->dri_drawable =
 249          (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 250                                               dri2_surf);
 251    } else {
 252       assert(dri2_dpy->swrast);
 253       dri2_surf->dri_drawable =
 254          (*dri2_dpy->swrast->createNewDrawable)(dri2_dpy->dri_screen, config,
 255                                                 dri2_surf);
 256    }
 257
 258    if (dri2_surf->dri_drawable == NULL) {
 259       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 260       goto cleanup_pixmap;
 261    }
 262
 263    if (type != EGL_PBUFFER_BIT) {
 264       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 265       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 266       if (error != NULL) {
 267          if (error->error_code == BadAlloc)
 268             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 269          else if (type == EGL_WINDOW_BIT)
 270             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 271          else
 272             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 273          free(error);
 274          goto cleanup_dri_drawable;
 275       } else if (reply == NULL) {
 276          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 277          goto cleanup_dri_drawable;
 278       }
 279
 280       dri2_surf->base.Width = reply->width;
 281       dri2_surf->base.Height = reply->height;
 282       dri2_surf->depth = reply->depth;
 283       free(reply);
 284    }
 285
 286    if (dri2_dpy->dri2) {
 287       xcb_void_cookie_t cookie;
 288       int conn_error;
 289
 290       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 291                                                 dri2_surf->drawable);
 292       error = xcb_request_check(dri2_dpy->conn, cookie);
 293       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 294       if (conn_error || error != NULL) {
 295          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 296             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 297          else if (type == EGL_WINDOW_BIT)
 298             _eglError(EGL_BAD_NATIVE_WINDOW,
 299                       "xcb_dri2_create_drawable_checked");
 300          else
 301             _eglError(EGL_BAD_NATIVE_PIXMAP,
 302                       "xcb_dri2_create_drawable_checked");
 303          free(error);
 304          goto cleanup_dri_drawable;
 305       }
 306    } else {
 307       if (type == EGL_PBUFFER_BIT) {
 308          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 309       }
 310       swrastCreateDrawable(dri2_dpy, dri2_surf);
 311    }
 312
 313    /* we always copy the back buffer to front */
 314    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 315
 316    return &dri2_surf->base;
 317
 318  cleanup_dri_drawable:
 319    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 320  cleanup_pixmap:
 321    if (type == EGL_PBUFFER_BIT)
 322       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 323  cleanup_surf:
 324    free(dri2_surf);
 325
 326    return NULL;
 327 }
 328
 329 /**
 330  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 331  */
 332 static _EGLSurface *
 333 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 334                                _EGLConfig *conf, void *native_window,
 335                                const EGLint *attrib_list)
 336 {
 337    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 338    _EGLSurface *surf;
 339
 340    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 341                                   native_window, attrib_list);
 342    if (surf != NULL) {
 343       /* When we first create the DRI2 drawable, its swap interval on the
 344        * server side is 1.
 345        */
 346       surf->SwapInterval = 1;
 347
 348       /* Override that with a driconf-set value. */
 349       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 350    }
 351
 352    return surf;
 353 }
 354
 355 static _EGLSurface *
 356 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 357                                _EGLConfig *conf, void *native_pixmap,
 358                                const EGLint *attrib_list)
 359 {
 360    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 361                                   native_pixmap, attrib_list);
 362 }
 363
 364 static _EGLSurface *
 365 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 366                                 _EGLConfig *conf, const EGLint *attrib_list)
 367 {
 368    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 369                                   XCB_WINDOW_NONE, attrib_list);
 370 }
 371
 372 static EGLBoolean
 373 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 374 {
 375    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 376    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 377
 378    (void) drv;
 379
 380    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 381
 382    if (dri2_dpy->dri2) {
 383       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 384    } else {
 385       assert(dri2_dpy->swrast);
 386       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 387    }
 388
 389    if (surf->Type == EGL_PBUFFER_BIT)
 390       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 391
 392    free(surf);
 393
 394    return EGL_TRUE;
 395 }
 396
 397 /**
 398  * Process list of buffer received from the server
 399  *
 400  * Processes the list of buffers received in a reply from the server to either
 401  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 402  */
 403 static void
 404 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 405                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 406 {
 407    struct dri2_egl_display *dri2_dpy =
 408       dri2_egl_display(dri2_surf->base.Resource.Display);
 409    xcb_rectangle_t rectangle;
 410    unsigned i;
 411
 412    dri2_surf->buffer_count = count;
 413    dri2_surf->have_fake_front = 0;
 414
 415    /* This assumes the DRI2 buffer attachment tokens matches the
 416     * __DRIbuffer tokens. */
 417    for (i = 0; i < count; i++) {
 418       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 419       dri2_surf->buffers[i].name = buffers[i].name;
 420       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 421       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 422       dri2_surf->buffers[i].flags = buffers[i].flags;
 423
 424       /* We only use the DRI drivers single buffer configs.  This
 425        * means that if we try to render to a window, DRI2 will give us
 426        * the fake front buffer, which we'll use as a back buffer.
 427        * Note that EGL doesn't require that several clients rendering
 428        * to the same window must see the same aux buffers. */
 429       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 430          dri2_surf->have_fake_front = 1;
 431    }
 432
 433    if (dri2_surf->region != XCB_NONE)
 434       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 435
 436    rectangle.x = 0;
 437    rectangle.y = 0;
 438    rectangle.width = dri2_surf->base.Width;
 439    rectangle.height = dri2_surf->base.Height;
 440    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 441    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 442 }
 443
 444 static __DRIbuffer *
 445 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 446                      int *width, int *height,
 447                      unsigned int *attachments, int count,
 448                      int *out_count, void *loaderPrivate)
 449 {
 450    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 451    struct dri2_egl_display *dri2_dpy =
 452       dri2_egl_display(dri2_surf->base.Resource.Display);
 453    xcb_dri2_dri2_buffer_t *buffers;
 454    xcb_dri2_get_buffers_reply_t *reply;
 455    xcb_dri2_get_buffers_cookie_t cookie;
 456
 457    (void) driDrawable;
 458
 459    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 460                                             dri2_surf->drawable,
 461                                             count, count, attachments);
 462    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 463    if (reply == NULL)
 464       return NULL;
 465    buffers = xcb_dri2_get_buffers_buffers (reply);
 466    if (buffers == NULL)
 467       return NULL;
 468
 469    *out_count = reply->count;
 470    dri2_surf->base.Width = *width = reply->width;
 471    dri2_surf->base.Height = *height = reply->height;
 472    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 473
 474    free(reply);
 475
 476    return dri2_surf->buffers;
 477 }
 478
 479 static __DRIbuffer *
 480 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 481                                  int *width, int *height,
 482                                  unsigned int *attachments, int count,
 483                                  int *out_count, void *loaderPrivate)
 484 {
 485    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 486    struct dri2_egl_display *dri2_dpy =
 487       dri2_egl_display(dri2_surf->base.Resource.Display);
 488    xcb_dri2_dri2_buffer_t *buffers;
 489    xcb_dri2_get_buffers_with_format_reply_t *reply;
 490    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 491    xcb_dri2_attach_format_t *format_attachments;
 492
 493    (void) driDrawable;
 494
 495    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 496    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 497                                                         dri2_surf->drawable,
 498                                                         count, count,
 499                                                         format_attachments);
 500
 501    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 502                                                    cookie, NULL);
 503    if (reply == NULL)
 504       return NULL;
 505
 506    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 507    dri2_surf->base.Width = *width = reply->width;
 508    dri2_surf->base.Height = *height = reply->height;
 509    *out_count = reply->count;
 510    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 511
 512    free(reply);
 513
 514    return dri2_surf->buffers;
 515 }
 516
 517 static void
 518 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 519 {
 520    (void) driDrawable;
 521
 522    /* FIXME: Does EGL support front buffer rendering at all? */
 523
 524 #if 0
 525    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 526
 527    dri2WaitGL(dri2_surf);
 528 #else
 529    (void) loaderPrivate;
 530 #endif
 531 }
 532
 533 static int
 534 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 535 {
 536    xcb_dri2_authenticate_reply_t *authenticate;
 537    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 538    int ret = 0;
 539
 540    authenticate_cookie =
 541       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 542    authenticate =
 543       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 544
 545    if (authenticate == NULL || !authenticate->authenticated)
 546       ret = -1;
 547
 548    free(authenticate);
 549
 550    return ret;
 551 }
 552
 553 static EGLBoolean
 554 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 555 {
 556 #ifdef HAVE_LIBDRM
 557    drm_magic_t magic;
 558
 559    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 560       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 561       return EGL_FALSE;
 562    }
 563
 564    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 565       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 566       return EGL_FALSE;
 567    }
 568 #endif
 569    return EGL_TRUE;
 570 }
 571
 572 static EGLBoolean
 573 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 574 {
 575    xcb_xfixes_query_version_reply_t *xfixes_query;
 576    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 577    xcb_dri2_query_version_reply_t *dri2_query;
 578    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 579    xcb_dri2_connect_reply_t *connect;
 580    xcb_dri2_connect_cookie_t connect_cookie;
 581    xcb_generic_error_t *error;
 582    char *driver_name, *loader_driver_name, *device_name;
 583    const xcb_query_extension_reply_t *extension;
 584
 585    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 586    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 587
 588    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 589    if (!(extension && extension->present))
 590       return EGL_FALSE;
 591
 592    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 593    if (!(extension && extension->present))
 594       return EGL_FALSE;
 595
 596    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 597                                                   XCB_XFIXES_MAJOR_VERSION,
 598                                                   XCB_XFIXES_MINOR_VERSION);
 599
 600    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 601                                                XCB_DRI2_MAJOR_VERSION,
 602                                                XCB_DRI2_MINOR_VERSION);
 603
 604    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 605                                    XCB_DRI2_DRIVER_TYPE_DRI);
 606
 607    xfixes_query =
 608       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 609                                       xfixes_query_cookie, &error);
 610    if (xfixes_query == NULL ||
 611        error != NULL || xfixes_query->major_version < 2) {
 612       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 613       free(error);
 614       return EGL_FALSE;
 615    }
 616    free(xfixes_query);
 617
 618    dri2_query =
 619       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 620    if (dri2_query == NULL || error != NULL) {
 621       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 622       free(error);
 623       return EGL_FALSE;
 624    }
 625    dri2_dpy->dri2_major = dri2_query->major_version;
 626    dri2_dpy->dri2_minor = dri2_query->minor_version;
 627    free(dri2_query);
 628
 629    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 630    if (connect == NULL ||
 631        connect->driver_name_length + connect->device_name_length == 0) {
 632       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 633       return EGL_FALSE;
 634    }
 635
 636    device_name = xcb_dri2_connect_device_name (connect);
 637
 638    dri2_dpy->fd = loader_open_device(device_name);
 639    if (dri2_dpy->fd == -1) {
 640       _eglLog(_EGL_WARNING,
 641               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 642       free(connect);
 643       return EGL_FALSE;
 644    }
 645
 646    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 647       close(dri2_dpy->fd);
 648       free(connect);
 649       return EGL_FALSE;
 650    }
 651
 652    driver_name = xcb_dri2_connect_driver_name (connect);
 653
 654    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 655     * Otherwise, default to the server's value.
 656     */
 657    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 658    if (loader_driver_name) {
 659       dri2_dpy->driver_name = loader_driver_name;
 660    } else {
 661       dri2_dpy->driver_name =
 662          strndup(driver_name,
 663                  xcb_dri2_connect_driver_name_length(connect));
 664    }
 665
 666    if (dri2_dpy->driver_name == NULL) {
 667       close(dri2_dpy->fd);
 668       free(dri2_dpy->driver_name);
 669       free(connect);
 670       return EGL_FALSE;
 671    }
 672
 673 #ifdef HAVE_WAYLAND_PLATFORM
 674    dri2_dpy->device_name =
 675       strndup(device_name,
 676               xcb_dri2_connect_device_name_length(connect));
 677 #endif
 678
 679    free(connect);
 680
 681    return EGL_TRUE;
 682 }
 683
 684 static int
 685 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 686 {
 687    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 688
 689    return dri2_x11_do_authenticate(dri2_dpy, id);
 690 }
 691
 692 static EGLBoolean
 693 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 694                                  _EGLDisplay *disp, bool supports_preserved)
 695 {
 696    xcb_depth_iterator_t d;
 697    xcb_visualtype_t *visuals;
 698    int i, j, count;
 699    unsigned int rgba_masks[4];
 700    EGLint surface_type;
 701    EGLint config_attrs[] = {
 702            EGL_NATIVE_VISUAL_ID,   0,
 703            EGL_NATIVE_VISUAL_TYPE, 0,
 704            EGL_NONE
 705    };
 706
 707    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 708    count = 0;
 709
 710    surface_type =
 711       EGL_WINDOW_BIT |
 712       EGL_PIXMAP_BIT |
 713       EGL_PBUFFER_BIT;
 714
 715    if (supports_preserved)
 716       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 717
 718    while (d.rem > 0) {
 719       EGLBoolean class_added[6] = { 0, };
 720
 721       visuals = xcb_depth_visuals(d.data);
 722       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 723          if (class_added[visuals[i]._class])
 724             continue;
 725
 726          class_added[visuals[i]._class] = EGL_TRUE;
 727          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 728             struct dri2_egl_config *dri2_conf;
 729             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 730
 731             config_attrs[1] = visuals[i].visual_id;
 732             config_attrs[3] = visuals[i]._class;
 733
 734             rgba_masks[0] = visuals[i].red_mask;
 735             rgba_masks[1] = visuals[i].green_mask;
 736             rgba_masks[2] = visuals[i].blue_mask;
 737             rgba_masks[3] = 0;
 738             dri2_conf = dri2_add_config(disp, config, count + 1, surface_type,
 739                                         config_attrs, rgba_masks);
 740             if (dri2_conf)
 741                count++;
 742
 743             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 744              * Otherwise it will only match a 32-bit RGBA visual.  On a
 745              * composited window manager on X11, this will make all of the
 746              * EGLConfigs with destination alpha get blended by the
 747              * compositor.  This is probably not what the application
 748              * wants... especially on drivers that only have 32-bit RGBA
 749              * EGLConfigs! */
 750             if (d.data->depth == 24) {
 751                rgba_masks[3] =
 752                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 753                dri2_conf = dri2_add_config(disp, config, count + 1, surface_type,
 754                                            config_attrs, rgba_masks);
 755                if (dri2_conf)
 756                   count++;
 757             }
 758          }
 759       }
 760
 761       xcb_depth_next(&d);
 762    }
 763
 764    if (!count) {
 765       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 766       return EGL_FALSE;
 767    }
 768
 769    return EGL_TRUE;
 770 }
 771
 772 static EGLBoolean
 773 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 774                  _EGLSurface *draw, xcb_xfixes_region_t region)
 775 {
 776    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 777    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 778    enum xcb_dri2_attachment_t render_attachment;
 779    xcb_dri2_copy_region_cookie_t cookie;
 780
 781    /* No-op for a pixmap or pbuffer surface */
 782    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 783       return EGL_TRUE;
 784
 785    if (dri2_dpy->flush)
 786       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 787
 788    if (dri2_surf->have_fake_front)
 789       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 790    else
 791       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 792
 793    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 794                                            dri2_surf->drawable,
 795                                            region,
 796                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 797                                            render_attachment);
 798    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 799
 800    return EGL_TRUE;
 801 }
 802
 803 static int64_t
 804 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 805                           int64_t msc, int64_t divisor, int64_t remainder)
 806 {
 807    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 808    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 809    uint32_t msc_hi = msc >> 32;
 810    uint32_t msc_lo = msc & 0xffffffff;
 811    uint32_t divisor_hi = divisor >> 32;
 812    uint32_t divisor_lo = divisor & 0xffffffff;
 813    uint32_t remainder_hi = remainder >> 32;
 814    uint32_t remainder_lo = remainder & 0xffffffff;
 815    xcb_dri2_swap_buffers_cookie_t cookie;
 816    xcb_dri2_swap_buffers_reply_t *reply;
 817    int64_t swap_count = -1;
 818
 819    /* No-op for a pixmap or pbuffer surface */
 820    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 821       return 0;
 822
 823    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 824       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 825
 826    dri2_flush_drawable_for_swapbuffers(disp, draw);
 827
 828    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 829                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 830
 831    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 832
 833    if (reply) {
 834       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 835       free(reply);
 836    }
 837
 838    /* Since we aren't watching for the server's invalidate events like we're
 839     * supposed to (due to XCB providing no mechanism for filtering the events
 840     * the way xlib does), and SwapBuffers is a common cause of invalidate
 841     * events, just shove one down to the driver, even though we haven't told
 842     * the driver that we're the kind of loader that provides reliable
 843     * invalidate events.  This causes the driver to request buffers again at
 844     * its next draw, so that we get the correct buffers if a pageflip
 845     * happened.  The driver should still be using the viewport hack to catch
 846     * window resizes.
 847     */
 848    if (dri2_dpy->flush &&
 849        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 850       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 851
 852    return swap_count;
 853 }
 854
 855 static EGLBoolean
 856 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 857 {
 858    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 859    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 860
 861    if (dri2_dpy->dri2) {
 862       if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1) {
 863           return EGL_TRUE;
 864       }
 865       /* Swap failed with a window drawable. */
 866       _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 867       return EGL_FALSE;
 868    } else {
 869       assert(dri2_dpy->swrast);
 870
 871       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 872       return EGL_TRUE;
 873    }
 874 }
 875
 876 static EGLBoolean
 877 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 878                              _EGLSurface *draw,
 879                              EGLint numRects, const EGLint *rects)
 880 {
 881    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 882    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 883    EGLBoolean ret;
 884    xcb_xfixes_region_t region;
 885    xcb_rectangle_t rectangles[16];
 886    int i;
 887
 888    if (numRects > (int)ARRAY_SIZE(rectangles))
 889       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 890
 891    for (i = 0; i < numRects; i++) {
 892       rectangles[i].x = rects[i * 4];
 893       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 894       rectangles[i].width = rects[i * 4 + 2];
 895       rectangles[i].height = rects[i * 4 + 3];
 896    }
 897
 898    region = xcb_generate_id(dri2_dpy->conn);
 899    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 900    ret = dri2_copy_region(drv, disp, draw, region);
 901    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 902
 903    return ret;
 904 }
 905
 906 static EGLBoolean
 907 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 908                      EGLint x, EGLint y, EGLint width, EGLint height)
 909 {
 910    const EGLint rect[4] = { x, y, width, height };
 911
 912    if (x < 0 || y < 0 || width < 0 || height < 0)
 913       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 914
 915    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 916 }
 917
 918 static EGLBoolean
 919 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 920                        EGLint interval)
 921 {
 922    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 923    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 924
 925    if (interval > surf->Config->MaxSwapInterval)
 926       interval = surf->Config->MaxSwapInterval;
 927    else if (interval < surf->Config->MinSwapInterval)
 928       interval = surf->Config->MinSwapInterval;
 929
 930    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 931       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 932
 933    surf->SwapInterval = interval;
 934
 935    return EGL_TRUE;
 936 }
 937
 938 static EGLBoolean
 939 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 940                       void *native_pixmap_target)
 941 {
 942    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 943    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 944    xcb_gcontext_t gc;
 945    xcb_pixmap_t target;
 946
 947    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 948    target = (uintptr_t) native_pixmap_target;
 949
 950    (void) drv;
 951
 952    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 953
 954    gc = xcb_generate_id(dri2_dpy->conn);
 955    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 956    xcb_copy_area(dri2_dpy->conn,
 957                   dri2_surf->drawable,
 958                   target,
 959                   gc,
 960                   0, 0,
 961                   0, 0,
 962                   dri2_surf->base.Width,
 963                   dri2_surf->base.Height);
 964    xcb_free_gc(dri2_dpy->conn, gc);
 965
 966    return EGL_TRUE;
 967 }
 968
 969 static _EGLImage *
 970 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 971                              EGLClientBuffer buffer, const EGLint *attr_list)
 972 {
 973    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 974    struct dri2_egl_image *dri2_img;
 975    unsigned int attachments[1];
 976    xcb_drawable_t drawable;
 977    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 978    xcb_dri2_get_buffers_reply_t *buffers_reply;
 979    xcb_dri2_dri2_buffer_t *buffers;
 980    xcb_get_geometry_cookie_t geometry_cookie;
 981    xcb_get_geometry_reply_t *geometry_reply;
 982    xcb_generic_error_t *error;
 983    int stride, format;
 984
 985    (void) ctx;
 986
 987    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 988    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 989    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 990    buffers_cookie =
 991       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 992                                       drawable, 1, 1, attachments);
 993    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
 994    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
 995                                                buffers_cookie, NULL);
 996    if (buffers_reply == NULL)
 997      return NULL;
 998
 999    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1000    if (buffers == NULL) {
1001       return NULL;
1002    }
1003
1004    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1005                                             geometry_cookie, &error);
1006    if (geometry_reply == NULL || error != NULL) {
1007       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1008       free(error);
1009       free(buffers_reply);
1010       return NULL;
1011    }
1012
1013    switch (geometry_reply->depth) {
1014    case 16:
1015       format = __DRI_IMAGE_FORMAT_RGB565;
1016       break;
1017    case 24:
1018       format = __DRI_IMAGE_FORMAT_XRGB8888;
1019       break;
1020    case 32:
1021       format = __DRI_IMAGE_FORMAT_ARGB8888;
1022       break;
1023    default:
1024       _eglError(EGL_BAD_PARAMETER,
1025                 "dri2_create_image_khr: unsupported pixmap depth");
1026       free(buffers_reply);
1027       free(geometry_reply);
1028       return NULL;
1029    }
1030
1031    dri2_img = malloc(sizeof *dri2_img);
1032    if (!dri2_img) {
1033       free(buffers_reply);
1034       free(geometry_reply);
1035       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1036       return EGL_NO_IMAGE_KHR;
1037    }
1038
1039    if (!_eglInitImage(&dri2_img->base, disp)) {
1040       free(buffers_reply);
1041       free(geometry_reply);
1042       free(dri2_img);
1043       return EGL_NO_IMAGE_KHR;
1044    }
1045
1046    stride = buffers[0].pitch / buffers[0].cpp;
1047    dri2_img->dri_image =
1048       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1049                                            buffers_reply->width,
1050                                            buffers_reply->height,
1051                                            format,
1052                                            buffers[0].name,
1053                                            stride,
1054                                            dri2_img);
1055
1056    free(buffers_reply);
1057    free(geometry_reply);
1058
1059    return &dri2_img->base;
1060 }
1061
1062 static _EGLImage *
1063 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1064                           _EGLContext *ctx, EGLenum target,
1065                           EGLClientBuffer buffer, const EGLint *attr_list)
1066 {
1067    (void) drv;
1068
1069    switch (target) {
1070    case EGL_NATIVE_PIXMAP_KHR:
1071       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1072    default:
1073       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1074    }
1075 }
1076
1077 static EGLBoolean
1078 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1079                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1080                          EGLuint64KHR *sbc)
1081 {
1082    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1083    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1084    xcb_dri2_get_msc_cookie_t cookie;
1085    xcb_dri2_get_msc_reply_t *reply;
1086
1087    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1088    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1089
1090    if (!reply) {
1091       _eglError(EGL_BAD_ACCESS, __func__);
1092       return EGL_FALSE;
1093    }
1094
1095    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1096    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1097    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1098    free(reply);
1099
1100    return EGL_TRUE;
1101 }
1102
1103 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1104    .authenticate = NULL,
1105    .create_window_surface = dri2_x11_create_window_surface,
1106    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1107    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1108    .destroy_surface = dri2_x11_destroy_surface,
1109    .create_image = dri2_fallback_create_image_khr,
1110    .swap_interval = dri2_fallback_swap_interval,
1111    .swap_buffers = dri2_x11_swap_buffers,
1112    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1113    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1114    .copy_buffers = dri2_x11_copy_buffers,
1115    .query_buffer_age = dri2_fallback_query_buffer_age,
1116    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1117    .get_sync_values = dri2_fallback_get_sync_values,
1118    .get_dri_drawable = dri2_surface_get_dri_drawable,
1119 };
1120
1121 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1122    .authenticate = dri2_x11_authenticate,
1123    .create_window_surface = dri2_x11_create_window_surface,
1124    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1125    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1126    .destroy_surface = dri2_x11_destroy_surface,
1127    .create_image = dri2_x11_create_image_khr,
1128    .swap_interval = dri2_x11_swap_interval,
1129    .swap_buffers = dri2_x11_swap_buffers,
1130    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1131    .swap_buffers_region = dri2_x11_swap_buffers_region,
1132    .post_sub_buffer = dri2_x11_post_sub_buffer,
1133    .copy_buffers = dri2_x11_copy_buffers,
1134    .query_buffer_age = dri2_fallback_query_buffer_age,
1135    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1136    .get_sync_values = dri2_x11_get_sync_values,
1137    .get_dri_drawable = dri2_surface_get_dri_drawable,
1138 };
1139
1140 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1141    .base = { __DRI_SWRAST_LOADER, 1 },
1142
1143    .getDrawableInfo = swrastGetDrawableInfo,
1144    .putImage        = swrastPutImage,
1145    .getImage        = swrastGetImage,
1146 };
1147
1148 static const __DRIextension *swrast_loader_extensions[] = {
1149    &swrast_loader_extension.base,
1150    NULL,
1151 };
1152
1153 static EGLBoolean
1154 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1155                         struct dri2_egl_display *dri2_dpy)
1156 {
1157    xcb_screen_iterator_t s;
1158    int screen = 0;
1159    const char *msg;
1160
1161    disp->DriverData = (void *) dri2_dpy;
1162    if (disp->PlatformDisplay == NULL) {
1163       dri2_dpy->conn = xcb_connect(NULL, &screen);
1164       dri2_dpy->own_device = true;
1165    } else {
1166       Display *dpy = disp->PlatformDisplay;
1167
1168       dri2_dpy->conn = XGetXCBConnection(dpy);
1169       screen = DefaultScreen(dpy);
1170    }
1171
1172    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1173       msg = "xcb_connect failed";
1174       goto disconnect;
1175    }
1176
1177    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1178    dri2_dpy->screen = get_xcb_screen(s, screen);
1179    if (!dri2_dpy->screen) {
1180       msg = "failed to get xcb screen";
1181       goto disconnect;
1182    }
1183
1184    return EGL_TRUE;
1185 disconnect:
1186    if (disp->PlatformDisplay == NULL)
1187       xcb_disconnect(dri2_dpy->conn);
1188
1189    return _eglError(EGL_BAD_ALLOC, msg);
1190 }
1191
1192 static EGLBoolean
1193 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1194 {
1195    struct dri2_egl_display *dri2_dpy;
1196
1197    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1198    if (!dri2_dpy)
1199       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1200
1201    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1202       goto cleanup_dpy;
1203
1204    /*
1205     * Every hardware driver_name is set using strdup. Doing the same in
1206     * here will allow is to simply free the memory at dri2_terminate().
1207     */
1208    dri2_dpy->fd = -1;
1209    dri2_dpy->driver_name = strdup("swrast");
1210    if (!dri2_load_driver_swrast(disp))
1211       goto cleanup_conn;
1212
1213    dri2_dpy->loader_extensions = swrast_loader_extensions;
1214
1215    if (!dri2_create_screen(disp))
1216       goto cleanup_driver;
1217
1218    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1219       goto cleanup_configs;
1220
1221    /* Fill vtbl last to prevent accidentally calling virtual function during
1222     * initialization.
1223     */
1224    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1225
1226    return EGL_TRUE;
1227
1228  cleanup_configs:
1229    _eglCleanupDisplay(disp);
1230    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1231  cleanup_driver:
1232    dlclose(dri2_dpy->driver);
1233  cleanup_conn:
1234    free(dri2_dpy->driver_name);
1235    if (disp->PlatformDisplay == NULL)
1236       xcb_disconnect(dri2_dpy->conn);
1237  cleanup_dpy:
1238    free(dri2_dpy);
1239    disp->DriverData = NULL;
1240
1241    return EGL_FALSE;
1242 }
1243
1244 static void
1245 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1246 {
1247    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1248    int arbitrary_max_interval = 1000;
1249
1250    /* default behavior for no SwapBuffers support: no vblank syncing
1251     * either.
1252     */
1253    dri2_dpy->min_swap_interval = 0;
1254    dri2_dpy->max_swap_interval = 0;
1255
1256    if (!dri2_dpy->swap_available)
1257       return;
1258
1259    /* If we do have swapbuffers, then we can support pretty much any swap
1260     * interval, but we allow driconf to override applications.
1261     */
1262    if (dri2_dpy->config)
1263       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1264                                      "vblank_mode", &vblank_mode);
1265    switch (vblank_mode) {
1266    case DRI_CONF_VBLANK_NEVER:
1267       dri2_dpy->min_swap_interval = 0;
1268       dri2_dpy->max_swap_interval = 0;
1269       dri2_dpy->default_swap_interval = 0;
1270       break;
1271    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1272       dri2_dpy->min_swap_interval = 1;
1273       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1274       dri2_dpy->default_swap_interval = 1;
1275       break;
1276    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1277       dri2_dpy->min_swap_interval = 0;
1278       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1279       dri2_dpy->default_swap_interval = 0;
1280       break;
1281    default:
1282    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1283       dri2_dpy->min_swap_interval = 0;
1284       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1285       dri2_dpy->default_swap_interval = 1;
1286       break;
1287    }
1288 }
1289
1290 #ifdef HAVE_DRI3
1291
1292 static const __DRIextension *dri3_image_loader_extensions[] = {
1293    &dri3_image_loader_extension.base,
1294    &image_lookup_extension.base,
1295    &use_invalidate.base,
1296    NULL,
1297 };
1298
1299 static EGLBoolean
1300 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1301 {
1302    struct dri2_egl_display *dri2_dpy;
1303
1304    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1305    if (!dri2_dpy)
1306       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1307
1308    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1309       goto cleanup_dpy;
1310
1311    if (!dri3_x11_connect(dri2_dpy))
1312       goto cleanup_conn;
1313
1314    if (!dri2_load_driver_dri3(disp))
1315       goto cleanup_conn;
1316
1317    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1318
1319    dri2_dpy->swap_available = true;
1320    dri2_dpy->invalidate_available = true;
1321
1322    if (!dri2_create_screen(disp))
1323       goto cleanup_fd;
1324
1325    dri2_x11_setup_swap_interval(dri2_dpy);
1326
1327    if (!dri2_dpy->is_different_gpu)
1328       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1329    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1330    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1331    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1332
1333    dri2_set_WL_bind_wayland_display(drv, disp);
1334
1335    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1336       goto cleanup_configs;
1337
1338    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1339    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1340    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1341    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1342    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1343    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1344
1345    /* Fill vtbl last to prevent accidentally calling virtual function during
1346     * initialization.
1347     */
1348    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1349
1350    _eglLog(_EGL_INFO, "Using DRI3");
1351
1352    return EGL_TRUE;
1353
1354  cleanup_configs:
1355    _eglCleanupDisplay(disp);
1356    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1357    dlclose(dri2_dpy->driver);
1358  cleanup_fd:
1359    close(dri2_dpy->fd);
1360  cleanup_conn:
1361    if (disp->PlatformDisplay == NULL)
1362       xcb_disconnect(dri2_dpy->conn);
1363  cleanup_dpy:
1364    free(dri2_dpy);
1365    disp->DriverData = NULL;
1366
1367    return EGL_FALSE;
1368 }
1369 #endif
1370
1371 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1372    .base = { __DRI_DRI2_LOADER, 2 },
1373
1374    .getBuffers           = dri2_x11_get_buffers,
1375    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1376    .getBuffersWithFormat = NULL,
1377 };
1378
1379 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1380    .base = { __DRI_DRI2_LOADER, 3 },
1381
1382    .getBuffers           = dri2_x11_get_buffers,
1383    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1384    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1385 };
1386
1387 static const __DRIextension *dri2_loader_extensions_old[] = {
1388    &dri2_loader_extension_old.base,
1389    &image_lookup_extension.base,
1390    NULL,
1391 };
1392
1393 static const __DRIextension *dri2_loader_extensions[] = {
1394    &dri2_loader_extension.base,
1395    &image_lookup_extension.base,
1396    NULL,
1397 };
1398
1399 static EGLBoolean
1400 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1401 {
1402    struct dri2_egl_display *dri2_dpy;
1403
1404    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1405    if (!dri2_dpy)
1406       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1407
1408    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1409       goto cleanup_dpy;
1410
1411    if (!dri2_x11_connect(dri2_dpy))
1412       goto cleanup_conn;
1413
1414    if (!dri2_load_driver(disp))
1415       goto cleanup_fd;
1416
1417    if (dri2_dpy->dri2_minor >= 1)
1418       dri2_dpy->loader_extensions = dri2_loader_extensions;
1419    else
1420       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1421
1422    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1423    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1424
1425    if (!dri2_create_screen(disp))
1426       goto cleanup_driver;
1427
1428    dri2_x11_setup_swap_interval(dri2_dpy);
1429
1430    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1431    disp->Extensions.NOK_swap_region = EGL_TRUE;
1432    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1433    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1434    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1435
1436    dri2_set_WL_bind_wayland_display(drv, disp);
1437
1438    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1439       goto cleanup_configs;
1440
1441    /* Fill vtbl last to prevent accidentally calling virtual function during
1442     * initialization.
1443     */
1444    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1445
1446    _eglLog(_EGL_INFO, "Using DRI2");
1447
1448    return EGL_TRUE;
1449
1450  cleanup_configs:
1451    _eglCleanupDisplay(disp);
1452    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1453  cleanup_driver:
1454    dlclose(dri2_dpy->driver);
1455  cleanup_fd:
1456    close(dri2_dpy->fd);
1457  cleanup_conn:
1458    if (disp->PlatformDisplay == NULL)
1459       xcb_disconnect(dri2_dpy->conn);
1460  cleanup_dpy:
1461    free(dri2_dpy);
1462    disp->DriverData = NULL;
1463
1464    return EGL_FALSE;
1465 }
1466
1467 EGLBoolean
1468 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1469 {
1470    EGLBoolean initialized = EGL_TRUE;
1471
1472    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1473
1474    if (x11_dri2_accel) {
1475 #ifdef HAVE_DRI3
1476       if (getenv("LIBGL_DRI3_DISABLE") != NULL ||
1477           !dri2_initialize_x11_dri3(drv, disp)) {
1478 #endif
1479          if (!dri2_initialize_x11_dri2(drv, disp)) {
1480             initialized = dri2_initialize_x11_swrast(drv, disp);
1481          }
1482 #ifdef HAVE_DRI3
1483       }
1484 #endif
1485    } else {
1486       initialized = dri2_initialize_x11_swrast(drv, disp);
1487    }
1488
1489    return initialized;
1490 }
1491