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  * Function utilizes swrastGetDrawableInfo to get surface
 399  * geometry from x server and calls default query surface
 400  * implementation that returns the updated values.
 401  *
 402  * In case of errors we still return values that we currently
 403  * have.
 404  */
 405 static EGLBoolean
 406 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 407                    _EGLSurface *surf, EGLint attribute,
 408                    EGLint *value)
 409 {
 410    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 411    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 412    int x, y, w = -1, h = -1;
 413
 414    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 415
 416    switch (attribute) {
 417    case EGL_WIDTH:
 418    case EGL_HEIGHT:
 419       swrastGetDrawableInfo(drawable, &x, &y, &w, &h, dri2_surf);
 420       if (w != -1 && h != -1) {
 421          surf->Width = w;
 422          surf->Height = h;
 423       }
 424       break;
 425    default:
 426       break;
 427    }
 428    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 429 }
 430
 431 /**
 432  * Process list of buffer received from the server
 433  *
 434  * Processes the list of buffers received in a reply from the server to either
 435  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 436  */
 437 static void
 438 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 439                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 440 {
 441    struct dri2_egl_display *dri2_dpy =
 442       dri2_egl_display(dri2_surf->base.Resource.Display);
 443    xcb_rectangle_t rectangle;
 444    unsigned i;
 445
 446    dri2_surf->buffer_count = count;
 447    dri2_surf->have_fake_front = 0;
 448
 449    /* This assumes the DRI2 buffer attachment tokens matches the
 450     * __DRIbuffer tokens. */
 451    for (i = 0; i < count; i++) {
 452       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 453       dri2_surf->buffers[i].name = buffers[i].name;
 454       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 455       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 456       dri2_surf->buffers[i].flags = buffers[i].flags;
 457
 458       /* We only use the DRI drivers single buffer configs.  This
 459        * means that if we try to render to a window, DRI2 will give us
 460        * the fake front buffer, which we'll use as a back buffer.
 461        * Note that EGL doesn't require that several clients rendering
 462        * to the same window must see the same aux buffers. */
 463       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 464          dri2_surf->have_fake_front = 1;
 465    }
 466
 467    if (dri2_surf->region != XCB_NONE)
 468       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 469
 470    rectangle.x = 0;
 471    rectangle.y = 0;
 472    rectangle.width = dri2_surf->base.Width;
 473    rectangle.height = dri2_surf->base.Height;
 474    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 475    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 476 }
 477
 478 static __DRIbuffer *
 479 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 480                      int *width, int *height,
 481                      unsigned int *attachments, int count,
 482                      int *out_count, void *loaderPrivate)
 483 {
 484    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 485    struct dri2_egl_display *dri2_dpy =
 486       dri2_egl_display(dri2_surf->base.Resource.Display);
 487    xcb_dri2_dri2_buffer_t *buffers;
 488    xcb_dri2_get_buffers_reply_t *reply;
 489    xcb_dri2_get_buffers_cookie_t cookie;
 490
 491    (void) driDrawable;
 492
 493    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 494                                             dri2_surf->drawable,
 495                                             count, count, attachments);
 496    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 497    if (reply == NULL)
 498       return NULL;
 499    buffers = xcb_dri2_get_buffers_buffers (reply);
 500    if (buffers == NULL)
 501       return NULL;
 502
 503    *out_count = reply->count;
 504    dri2_surf->base.Width = *width = reply->width;
 505    dri2_surf->base.Height = *height = reply->height;
 506    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 507
 508    free(reply);
 509
 510    return dri2_surf->buffers;
 511 }
 512
 513 static __DRIbuffer *
 514 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 515                                  int *width, int *height,
 516                                  unsigned int *attachments, int count,
 517                                  int *out_count, void *loaderPrivate)
 518 {
 519    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 520    struct dri2_egl_display *dri2_dpy =
 521       dri2_egl_display(dri2_surf->base.Resource.Display);
 522    xcb_dri2_dri2_buffer_t *buffers;
 523    xcb_dri2_get_buffers_with_format_reply_t *reply;
 524    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 525    xcb_dri2_attach_format_t *format_attachments;
 526
 527    (void) driDrawable;
 528
 529    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 530    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 531                                                         dri2_surf->drawable,
 532                                                         count, count,
 533                                                         format_attachments);
 534
 535    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 536                                                    cookie, NULL);
 537    if (reply == NULL)
 538       return NULL;
 539
 540    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 541    dri2_surf->base.Width = *width = reply->width;
 542    dri2_surf->base.Height = *height = reply->height;
 543    *out_count = reply->count;
 544    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 545
 546    free(reply);
 547
 548    return dri2_surf->buffers;
 549 }
 550
 551 static void
 552 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 553 {
 554    (void) driDrawable;
 555
 556    /* FIXME: Does EGL support front buffer rendering at all? */
 557
 558 #if 0
 559    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 560
 561    dri2WaitGL(dri2_surf);
 562 #else
 563    (void) loaderPrivate;
 564 #endif
 565 }
 566
 567 static int
 568 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 569 {
 570    xcb_dri2_authenticate_reply_t *authenticate;
 571    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 572    int ret = 0;
 573
 574    authenticate_cookie =
 575       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 576    authenticate =
 577       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 578
 579    if (authenticate == NULL || !authenticate->authenticated)
 580       ret = -1;
 581
 582    free(authenticate);
 583
 584    return ret;
 585 }
 586
 587 static EGLBoolean
 588 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 589 {
 590 #ifdef HAVE_LIBDRM
 591    drm_magic_t magic;
 592
 593    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 594       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 595       return EGL_FALSE;
 596    }
 597
 598    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 599       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 600       return EGL_FALSE;
 601    }
 602 #endif
 603    return EGL_TRUE;
 604 }
 605
 606 static EGLBoolean
 607 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 608 {
 609    xcb_xfixes_query_version_reply_t *xfixes_query;
 610    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 611    xcb_dri2_query_version_reply_t *dri2_query;
 612    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 613    xcb_dri2_connect_reply_t *connect;
 614    xcb_dri2_connect_cookie_t connect_cookie;
 615    xcb_generic_error_t *error;
 616    char *driver_name, *loader_driver_name, *device_name;
 617    const xcb_query_extension_reply_t *extension;
 618
 619    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 620    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 621
 622    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 623    if (!(extension && extension->present))
 624       return EGL_FALSE;
 625
 626    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 627    if (!(extension && extension->present))
 628       return EGL_FALSE;
 629
 630    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 631                                                   XCB_XFIXES_MAJOR_VERSION,
 632                                                   XCB_XFIXES_MINOR_VERSION);
 633
 634    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 635                                                XCB_DRI2_MAJOR_VERSION,
 636                                                XCB_DRI2_MINOR_VERSION);
 637
 638    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 639                                    XCB_DRI2_DRIVER_TYPE_DRI);
 640
 641    xfixes_query =
 642       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 643                                       xfixes_query_cookie, &error);
 644    if (xfixes_query == NULL ||
 645        error != NULL || xfixes_query->major_version < 2) {
 646       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 647       free(error);
 648       return EGL_FALSE;
 649    }
 650    free(xfixes_query);
 651
 652    dri2_query =
 653       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 654    if (dri2_query == NULL || error != NULL) {
 655       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 656       free(error);
 657       return EGL_FALSE;
 658    }
 659    dri2_dpy->dri2_major = dri2_query->major_version;
 660    dri2_dpy->dri2_minor = dri2_query->minor_version;
 661    free(dri2_query);
 662
 663    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 664    if (connect == NULL ||
 665        connect->driver_name_length + connect->device_name_length == 0) {
 666       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 667       return EGL_FALSE;
 668    }
 669
 670    device_name = xcb_dri2_connect_device_name (connect);
 671
 672    dri2_dpy->fd = loader_open_device(device_name);
 673    if (dri2_dpy->fd == -1) {
 674       _eglLog(_EGL_WARNING,
 675               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 676       free(connect);
 677       return EGL_FALSE;
 678    }
 679
 680    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 681       close(dri2_dpy->fd);
 682       free(connect);
 683       return EGL_FALSE;
 684    }
 685
 686    driver_name = xcb_dri2_connect_driver_name (connect);
 687
 688    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 689     * Otherwise, default to the server's value.
 690     */
 691    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 692    if (loader_driver_name) {
 693       dri2_dpy->driver_name = loader_driver_name;
 694    } else {
 695       dri2_dpy->driver_name =
 696          strndup(driver_name,
 697                  xcb_dri2_connect_driver_name_length(connect));
 698    }
 699
 700    if (dri2_dpy->driver_name == NULL) {
 701       close(dri2_dpy->fd);
 702       free(dri2_dpy->driver_name);
 703       free(connect);
 704       return EGL_FALSE;
 705    }
 706
 707 #ifdef HAVE_WAYLAND_PLATFORM
 708    dri2_dpy->device_name =
 709       strndup(device_name,
 710               xcb_dri2_connect_device_name_length(connect));
 711 #endif
 712
 713    free(connect);
 714
 715    return EGL_TRUE;
 716 }
 717
 718 static int
 719 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 720 {
 721    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 722
 723    return dri2_x11_do_authenticate(dri2_dpy, id);
 724 }
 725
 726 static EGLBoolean
 727 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 728                                  _EGLDisplay *disp, bool supports_preserved)
 729 {
 730    xcb_depth_iterator_t d;
 731    xcb_visualtype_t *visuals;
 732    int i, j, count;
 733    unsigned int rgba_masks[4];
 734    EGLint surface_type;
 735    EGLint config_attrs[] = {
 736            EGL_NATIVE_VISUAL_ID,   0,
 737            EGL_NATIVE_VISUAL_TYPE, 0,
 738            EGL_NONE
 739    };
 740
 741    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 742    count = 0;
 743
 744    surface_type =
 745       EGL_WINDOW_BIT |
 746       EGL_PIXMAP_BIT |
 747       EGL_PBUFFER_BIT;
 748
 749    if (supports_preserved)
 750       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 751
 752    while (d.rem > 0) {
 753       EGLBoolean class_added[6] = { 0, };
 754
 755       visuals = xcb_depth_visuals(d.data);
 756       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 757          if (class_added[visuals[i]._class])
 758             continue;
 759
 760          class_added[visuals[i]._class] = EGL_TRUE;
 761          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 762             struct dri2_egl_config *dri2_conf;
 763             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 764
 765             config_attrs[1] = visuals[i].visual_id;
 766             config_attrs[3] = visuals[i]._class;
 767
 768             rgba_masks[0] = visuals[i].red_mask;
 769             rgba_masks[1] = visuals[i].green_mask;
 770             rgba_masks[2] = visuals[i].blue_mask;
 771             rgba_masks[3] = 0;
 772             dri2_conf = dri2_add_config(disp, config, count + 1, surface_type,
 773                                         config_attrs, rgba_masks);
 774             if (dri2_conf)
 775                count++;
 776
 777             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 778              * Otherwise it will only match a 32-bit RGBA visual.  On a
 779              * composited window manager on X11, this will make all of the
 780              * EGLConfigs with destination alpha get blended by the
 781              * compositor.  This is probably not what the application
 782              * wants... especially on drivers that only have 32-bit RGBA
 783              * EGLConfigs! */
 784             if (d.data->depth == 24) {
 785                rgba_masks[3] =
 786                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 787                dri2_conf = dri2_add_config(disp, config, count + 1, surface_type,
 788                                            config_attrs, rgba_masks);
 789                if (dri2_conf)
 790                   count++;
 791             }
 792          }
 793       }
 794
 795       xcb_depth_next(&d);
 796    }
 797
 798    if (!count) {
 799       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 800       return EGL_FALSE;
 801    }
 802
 803    return EGL_TRUE;
 804 }
 805
 806 static EGLBoolean
 807 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 808                  _EGLSurface *draw, xcb_xfixes_region_t region)
 809 {
 810    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 811    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 812    enum xcb_dri2_attachment_t render_attachment;
 813    xcb_dri2_copy_region_cookie_t cookie;
 814
 815    /* No-op for a pixmap or pbuffer surface */
 816    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 817       return EGL_TRUE;
 818
 819    if (dri2_dpy->flush)
 820       dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 821
 822    if (dri2_surf->have_fake_front)
 823       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 824    else
 825       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 826
 827    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 828                                            dri2_surf->drawable,
 829                                            region,
 830                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 831                                            render_attachment);
 832    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 833
 834    return EGL_TRUE;
 835 }
 836
 837 static int64_t
 838 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 839                           int64_t msc, int64_t divisor, int64_t remainder)
 840 {
 841    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 842    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 843    uint32_t msc_hi = msc >> 32;
 844    uint32_t msc_lo = msc & 0xffffffff;
 845    uint32_t divisor_hi = divisor >> 32;
 846    uint32_t divisor_lo = divisor & 0xffffffff;
 847    uint32_t remainder_hi = remainder >> 32;
 848    uint32_t remainder_lo = remainder & 0xffffffff;
 849    xcb_dri2_swap_buffers_cookie_t cookie;
 850    xcb_dri2_swap_buffers_reply_t *reply;
 851    int64_t swap_count = -1;
 852
 853    /* No-op for a pixmap or pbuffer surface */
 854    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 855       return 0;
 856
 857    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 858       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 859
 860    dri2_flush_drawable_for_swapbuffers(disp, draw);
 861
 862    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 863                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 864
 865    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 866
 867    if (reply) {
 868       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 869       free(reply);
 870    }
 871
 872    /* Since we aren't watching for the server's invalidate events like we're
 873     * supposed to (due to XCB providing no mechanism for filtering the events
 874     * the way xlib does), and SwapBuffers is a common cause of invalidate
 875     * events, just shove one down to the driver, even though we haven't told
 876     * the driver that we're the kind of loader that provides reliable
 877     * invalidate events.  This causes the driver to request buffers again at
 878     * its next draw, so that we get the correct buffers if a pageflip
 879     * happened.  The driver should still be using the viewport hack to catch
 880     * window resizes.
 881     */
 882    if (dri2_dpy->flush &&
 883        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 884       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 885
 886    return swap_count;
 887 }
 888
 889 static EGLBoolean
 890 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 891 {
 892    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 893    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 894
 895    if (dri2_dpy->dri2) {
 896       if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1) {
 897           return EGL_TRUE;
 898       }
 899       /* Swap failed with a window drawable. */
 900       _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 901       return EGL_FALSE;
 902    } else {
 903       assert(dri2_dpy->swrast);
 904
 905       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 906       return EGL_TRUE;
 907    }
 908 }
 909
 910 static EGLBoolean
 911 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 912                              _EGLSurface *draw,
 913                              EGLint numRects, const EGLint *rects)
 914 {
 915    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 916    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 917    EGLBoolean ret;
 918    xcb_xfixes_region_t region;
 919    xcb_rectangle_t rectangles[16];
 920    int i;
 921
 922    if (numRects > (int)ARRAY_SIZE(rectangles))
 923       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 924
 925    for (i = 0; i < numRects; i++) {
 926       rectangles[i].x = rects[i * 4];
 927       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 928       rectangles[i].width = rects[i * 4 + 2];
 929       rectangles[i].height = rects[i * 4 + 3];
 930    }
 931
 932    region = xcb_generate_id(dri2_dpy->conn);
 933    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 934    ret = dri2_copy_region(drv, disp, draw, region);
 935    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 936
 937    return ret;
 938 }
 939
 940 static EGLBoolean
 941 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 942                      EGLint x, EGLint y, EGLint width, EGLint height)
 943 {
 944    const EGLint rect[4] = { x, y, width, height };
 945
 946    if (x < 0 || y < 0 || width < 0 || height < 0)
 947       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 948
 949    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 950 }
 951
 952 static EGLBoolean
 953 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 954                        EGLint interval)
 955 {
 956    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 957    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 958
 959    if (interval > surf->Config->MaxSwapInterval)
 960       interval = surf->Config->MaxSwapInterval;
 961    else if (interval < surf->Config->MinSwapInterval)
 962       interval = surf->Config->MinSwapInterval;
 963
 964    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 965       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 966
 967    surf->SwapInterval = interval;
 968
 969    return EGL_TRUE;
 970 }
 971
 972 static EGLBoolean
 973 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 974                       void *native_pixmap_target)
 975 {
 976    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 977    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 978    xcb_gcontext_t gc;
 979    xcb_pixmap_t target;
 980
 981    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 982    target = (uintptr_t) native_pixmap_target;
 983
 984    (void) drv;
 985
 986    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 987
 988    gc = xcb_generate_id(dri2_dpy->conn);
 989    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 990    xcb_copy_area(dri2_dpy->conn,
 991                   dri2_surf->drawable,
 992                   target,
 993                   gc,
 994                   0, 0,
 995                   0, 0,
 996                   dri2_surf->base.Width,
 997                   dri2_surf->base.Height);
 998    xcb_free_gc(dri2_dpy->conn, gc);
 999
1000    return EGL_TRUE;
1001 }
1002
1003 static _EGLImage *
1004 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1005                              EGLClientBuffer buffer, const EGLint *attr_list)
1006 {
1007    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1008    struct dri2_egl_image *dri2_img;
1009    unsigned int attachments[1];
1010    xcb_drawable_t drawable;
1011    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1012    xcb_dri2_get_buffers_reply_t *buffers_reply;
1013    xcb_dri2_dri2_buffer_t *buffers;
1014    xcb_get_geometry_cookie_t geometry_cookie;
1015    xcb_get_geometry_reply_t *geometry_reply;
1016    xcb_generic_error_t *error;
1017    int stride, format;
1018
1019    (void) ctx;
1020
1021    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1022    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1023    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1024    buffers_cookie =
1025       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1026                                       drawable, 1, 1, attachments);
1027    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1028    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1029                                                buffers_cookie, NULL);
1030    if (buffers_reply == NULL)
1031      return NULL;
1032
1033    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1034    if (buffers == NULL) {
1035       return NULL;
1036    }
1037
1038    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1039                                             geometry_cookie, &error);
1040    if (geometry_reply == NULL || error != NULL) {
1041       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1042       free(error);
1043       free(buffers_reply);
1044       return NULL;
1045    }
1046
1047    switch (geometry_reply->depth) {
1048    case 16:
1049       format = __DRI_IMAGE_FORMAT_RGB565;
1050       break;
1051    case 24:
1052       format = __DRI_IMAGE_FORMAT_XRGB8888;
1053       break;
1054    case 32:
1055       format = __DRI_IMAGE_FORMAT_ARGB8888;
1056       break;
1057    default:
1058       _eglError(EGL_BAD_PARAMETER,
1059                 "dri2_create_image_khr: unsupported pixmap depth");
1060       free(buffers_reply);
1061       free(geometry_reply);
1062       return NULL;
1063    }
1064
1065    dri2_img = malloc(sizeof *dri2_img);
1066    if (!dri2_img) {
1067       free(buffers_reply);
1068       free(geometry_reply);
1069       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1070       return EGL_NO_IMAGE_KHR;
1071    }
1072
1073    if (!_eglInitImage(&dri2_img->base, disp)) {
1074       free(buffers_reply);
1075       free(geometry_reply);
1076       free(dri2_img);
1077       return EGL_NO_IMAGE_KHR;
1078    }
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       _eglError(EGL_BAD_ACCESS, __func__);
1126       return EGL_FALSE;
1127    }
1128
1129    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1130    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1131    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1132    free(reply);
1133
1134    return EGL_TRUE;
1135 }
1136
1137 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1138    .authenticate = NULL,
1139    .create_window_surface = dri2_x11_create_window_surface,
1140    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1141    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1142    .destroy_surface = dri2_x11_destroy_surface,
1143    .create_image = dri2_fallback_create_image_khr,
1144    .swap_interval = dri2_fallback_swap_interval,
1145    .swap_buffers = dri2_x11_swap_buffers,
1146    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1147    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1148    .copy_buffers = dri2_x11_copy_buffers,
1149    .query_buffer_age = dri2_fallback_query_buffer_age,
1150    .query_surface = dri2_query_surface,
1151    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1152    .get_sync_values = dri2_fallback_get_sync_values,
1153    .get_dri_drawable = dri2_surface_get_dri_drawable,
1154 };
1155
1156 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1157    .authenticate = dri2_x11_authenticate,
1158    .create_window_surface = dri2_x11_create_window_surface,
1159    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1160    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1161    .destroy_surface = dri2_x11_destroy_surface,
1162    .create_image = dri2_x11_create_image_khr,
1163    .swap_interval = dri2_x11_swap_interval,
1164    .swap_buffers = dri2_x11_swap_buffers,
1165    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1166    .swap_buffers_region = dri2_x11_swap_buffers_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    NULL,
1187 };
1188
1189 static EGLBoolean
1190 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1191                         struct dri2_egl_display *dri2_dpy)
1192 {
1193    xcb_screen_iterator_t s;
1194    int screen = 0;
1195    const char *msg;
1196
1197    disp->DriverData = (void *) dri2_dpy;
1198    if (disp->PlatformDisplay == NULL) {
1199       dri2_dpy->conn = xcb_connect(NULL, &screen);
1200       dri2_dpy->own_device = true;
1201    } else {
1202       Display *dpy = disp->PlatformDisplay;
1203
1204       dri2_dpy->conn = XGetXCBConnection(dpy);
1205       screen = DefaultScreen(dpy);
1206    }
1207
1208    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1209       msg = "xcb_connect failed";
1210       goto disconnect;
1211    }
1212
1213    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1214    dri2_dpy->screen = get_xcb_screen(s, screen);
1215    if (!dri2_dpy->screen) {
1216       msg = "failed to get xcb screen";
1217       goto disconnect;
1218    }
1219
1220    return EGL_TRUE;
1221 disconnect:
1222    if (disp->PlatformDisplay == NULL)
1223       xcb_disconnect(dri2_dpy->conn);
1224
1225    return _eglError(EGL_BAD_ALLOC, msg);
1226 }
1227
1228 static EGLBoolean
1229 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1230 {
1231    struct dri2_egl_display *dri2_dpy;
1232
1233    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1234    if (!dri2_dpy)
1235       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1236
1237    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1238       goto cleanup_dpy;
1239
1240    /*
1241     * Every hardware driver_name is set using strdup. Doing the same in
1242     * here will allow is to simply free the memory at dri2_terminate().
1243     */
1244    dri2_dpy->fd = -1;
1245    dri2_dpy->driver_name = strdup("swrast");
1246    if (!dri2_load_driver_swrast(disp))
1247       goto cleanup_conn;
1248
1249    dri2_dpy->loader_extensions = swrast_loader_extensions;
1250
1251    if (!dri2_create_screen(disp))
1252       goto cleanup_driver;
1253
1254    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1255       goto cleanup_configs;
1256
1257    /* Fill vtbl last to prevent accidentally calling virtual function during
1258     * initialization.
1259     */
1260    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1261
1262    return EGL_TRUE;
1263
1264  cleanup_configs:
1265    _eglCleanupDisplay(disp);
1266    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1267  cleanup_driver:
1268    dlclose(dri2_dpy->driver);
1269  cleanup_conn:
1270    free(dri2_dpy->driver_name);
1271    if (disp->PlatformDisplay == NULL)
1272       xcb_disconnect(dri2_dpy->conn);
1273  cleanup_dpy:
1274    free(dri2_dpy);
1275    disp->DriverData = NULL;
1276
1277    return EGL_FALSE;
1278 }
1279
1280 static void
1281 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1282 {
1283    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1284    int arbitrary_max_interval = 1000;
1285
1286    /* default behavior for no SwapBuffers support: no vblank syncing
1287     * either.
1288     */
1289    dri2_dpy->min_swap_interval = 0;
1290    dri2_dpy->max_swap_interval = 0;
1291
1292    if (!dri2_dpy->swap_available)
1293       return;
1294
1295    /* If we do have swapbuffers, then we can support pretty much any swap
1296     * interval, but we allow driconf to override applications.
1297     */
1298    if (dri2_dpy->config)
1299       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1300                                      "vblank_mode", &vblank_mode);
1301    switch (vblank_mode) {
1302    case DRI_CONF_VBLANK_NEVER:
1303       dri2_dpy->min_swap_interval = 0;
1304       dri2_dpy->max_swap_interval = 0;
1305       dri2_dpy->default_swap_interval = 0;
1306       break;
1307    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1308       dri2_dpy->min_swap_interval = 1;
1309       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1310       dri2_dpy->default_swap_interval = 1;
1311       break;
1312    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1313       dri2_dpy->min_swap_interval = 0;
1314       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1315       dri2_dpy->default_swap_interval = 0;
1316       break;
1317    default:
1318    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1319       dri2_dpy->min_swap_interval = 0;
1320       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1321       dri2_dpy->default_swap_interval = 1;
1322       break;
1323    }
1324 }
1325
1326 #ifdef HAVE_DRI3
1327
1328 static const __DRIextension *dri3_image_loader_extensions[] = {
1329    &dri3_image_loader_extension.base,
1330    &image_lookup_extension.base,
1331    &use_invalidate.base,
1332    NULL,
1333 };
1334
1335 static EGLBoolean
1336 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1337 {
1338    struct dri2_egl_display *dri2_dpy;
1339
1340    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1341    if (!dri2_dpy)
1342       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1343
1344    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1345       goto cleanup_dpy;
1346
1347    if (!dri3_x11_connect(dri2_dpy))
1348       goto cleanup_conn;
1349
1350    if (!dri2_load_driver_dri3(disp))
1351       goto cleanup_conn;
1352
1353    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1354
1355    dri2_dpy->swap_available = true;
1356    dri2_dpy->invalidate_available = true;
1357
1358    if (!dri2_create_screen(disp))
1359       goto cleanup_fd;
1360
1361    dri2_x11_setup_swap_interval(dri2_dpy);
1362
1363    if (!dri2_dpy->is_different_gpu)
1364       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1365    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1366    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1367    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1368
1369    dri2_set_WL_bind_wayland_display(drv, disp);
1370
1371    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1372       goto cleanup_configs;
1373
1374    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1375    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1376    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1377    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1378    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1379    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1380
1381    /* Fill vtbl last to prevent accidentally calling virtual function during
1382     * initialization.
1383     */
1384    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1385
1386    _eglLog(_EGL_INFO, "Using DRI3");
1387
1388    return EGL_TRUE;
1389
1390  cleanup_configs:
1391    _eglCleanupDisplay(disp);
1392    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1393    dlclose(dri2_dpy->driver);
1394  cleanup_fd:
1395    close(dri2_dpy->fd);
1396  cleanup_conn:
1397    if (disp->PlatformDisplay == NULL)
1398       xcb_disconnect(dri2_dpy->conn);
1399  cleanup_dpy:
1400    free(dri2_dpy);
1401    disp->DriverData = NULL;
1402
1403    return EGL_FALSE;
1404 }
1405 #endif
1406
1407 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1408    .base = { __DRI_DRI2_LOADER, 2 },
1409
1410    .getBuffers           = dri2_x11_get_buffers,
1411    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1412    .getBuffersWithFormat = NULL,
1413 };
1414
1415 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1416    .base = { __DRI_DRI2_LOADER, 3 },
1417
1418    .getBuffers           = dri2_x11_get_buffers,
1419    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1420    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1421 };
1422
1423 static const __DRIextension *dri2_loader_extensions_old[] = {
1424    &dri2_loader_extension_old.base,
1425    &image_lookup_extension.base,
1426    NULL,
1427 };
1428
1429 static const __DRIextension *dri2_loader_extensions[] = {
1430    &dri2_loader_extension.base,
1431    &image_lookup_extension.base,
1432    NULL,
1433 };
1434
1435 static EGLBoolean
1436 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1437 {
1438    struct dri2_egl_display *dri2_dpy;
1439
1440    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1441    if (!dri2_dpy)
1442       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1443
1444    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1445       goto cleanup_dpy;
1446
1447    if (!dri2_x11_connect(dri2_dpy))
1448       goto cleanup_conn;
1449
1450    if (!dri2_load_driver(disp))
1451       goto cleanup_fd;
1452
1453    if (dri2_dpy->dri2_minor >= 1)
1454       dri2_dpy->loader_extensions = dri2_loader_extensions;
1455    else
1456       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1457
1458    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1459    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1460
1461    if (!dri2_create_screen(disp))
1462       goto cleanup_driver;
1463
1464    dri2_x11_setup_swap_interval(dri2_dpy);
1465
1466    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1467    disp->Extensions.NOK_swap_region = EGL_TRUE;
1468    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1469    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1470    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1471
1472    dri2_set_WL_bind_wayland_display(drv, disp);
1473
1474    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1475       goto cleanup_configs;
1476
1477    /* Fill vtbl last to prevent accidentally calling virtual function during
1478     * initialization.
1479     */
1480    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1481
1482    _eglLog(_EGL_INFO, "Using DRI2");
1483
1484    return EGL_TRUE;
1485
1486  cleanup_configs:
1487    _eglCleanupDisplay(disp);
1488    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1489  cleanup_driver:
1490    dlclose(dri2_dpy->driver);
1491  cleanup_fd:
1492    close(dri2_dpy->fd);
1493  cleanup_conn:
1494    if (disp->PlatformDisplay == NULL)
1495       xcb_disconnect(dri2_dpy->conn);
1496  cleanup_dpy:
1497    free(dri2_dpy);
1498    disp->DriverData = NULL;
1499
1500    return EGL_FALSE;
1501 }
1502
1503 EGLBoolean
1504 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1505 {
1506    EGLBoolean initialized = EGL_FALSE;
1507
1508    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1509 #ifdef HAVE_DRI3
1510       if (!getenv("LIBGL_DRI3_DISABLE"))
1511          initialized = dri2_initialize_x11_dri3(drv, disp);
1512 #endif
1513
1514       if (!initialized)
1515          initialized = dri2_initialize_x11_dri2(drv, disp);
1516    }
1517
1518    if (!initialized)
1519       initialized = dri2_initialize_x11_swrast(drv, disp);
1520
1521    return initialized;
1522 }
1523