src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/macros.h"
  44
  45 #include "egl_dri2.h"
  46 #include "egl_dri2_fallbacks.h"
  47 #include "loader.h"
  48
  49 #ifdef HAVE_DRI3
  50 #include "platform_x11_dri3.h"
  51 #endif
  52
  53 static EGLBoolean
  54 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  55                        EGLint interval);
  56
  57 static void
  58 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  59                      struct dri2_egl_surface * dri2_surf)
  60 {
  61    uint32_t           mask;
  62    const uint32_t     function = GXcopy;
  63    uint32_t           valgc[2];
  64
  65    /* create GC's */
  66    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  67    mask = XCB_GC_FUNCTION;
  68    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  69
  70    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  72    valgc[0] = function;
  73    valgc[1] = False;
  74    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  75    switch (dri2_surf->depth) {
  76       case 32:
  77       case 24:
  78          dri2_surf->bytes_per_pixel = 4;
  79          break;
  80       case 16:
  81          dri2_surf->bytes_per_pixel = 2;
  82          break;
  83       case 8:
  84          dri2_surf->bytes_per_pixel = 1;
  85          break;
  86       case 0:
  87          dri2_surf->bytes_per_pixel = 0;
  88          break;
  89       default:
  90          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  91    }
  92 }
  93
  94 static void
  95 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  96                       struct dri2_egl_surface * dri2_surf)
  97 {
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  99    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 100 }
 101
 102 static void
 103 swrastGetDrawableInfo(__DRIdrawable * draw,
 104                       int *x, int *y, int *w, int *h,
 105                       void *loaderPrivate)
 106 {
 107    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 108    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 109
 110    xcb_get_geometry_cookie_t cookie;
 111    xcb_get_geometry_reply_t *reply;
 112    xcb_generic_error_t *error;
 113
 114    *w = *h = 0;
 115    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 116    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 117    if (reply == NULL)
 118       return;
 119
 120    if (error != NULL) {
 121       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 122       free(error);
 123    } else {
 124       *w = reply->width;
 125       *h = reply->height;
 126    }
 127    free(reply);
 128 }
 129
 130 static void
 131 swrastPutImage(__DRIdrawable * draw, int op,
 132                int x, int y, int w, int h,
 133                char *data, void *loaderPrivate)
 134 {
 135    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 136    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 137
 138    xcb_gcontext_t gc;
 139
 140    switch (op) {
 141    case __DRI_SWRAST_IMAGE_OP_DRAW:
 142       gc = dri2_surf->gc;
 143       break;
 144    case __DRI_SWRAST_IMAGE_OP_SWAP:
 145       gc = dri2_surf->swapgc;
 146       break;
 147    default:
 148       return;
 149    }
 150
 151    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 152                  gc, w, h, x, y, 0, dri2_surf->depth,
 153                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 154 }
 155
 156 static void
 157 swrastGetImage(__DRIdrawable * read,
 158                int x, int y, int w, int h,
 159                char *data, void *loaderPrivate)
 160 {
 161    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 162    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 163
 164    xcb_get_image_cookie_t cookie;
 165    xcb_get_image_reply_t *reply;
 166    xcb_generic_error_t *error;
 167
 168    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 169                            dri2_surf->drawable, x, y, w, h, ~0);
 170    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 171    if (reply == NULL)
 172       return;
 173
 174    if (error != NULL) {
 175       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 176       free(error);
 177    } else {
 178       uint32_t bytes = xcb_get_image_data_length(reply);
 179       uint8_t *idata = xcb_get_image_data(reply);
 180       memcpy(data, idata, bytes);
 181    }
 182    free(reply);
 183 }
 184
 185
 186 static xcb_screen_t *
 187 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 188 {
 189     for (; iter.rem; --screen, xcb_screen_next(&iter))
 190         if (screen == 0)
 191             return iter.data;
 192
 193     return NULL;
 194 }
 195
 196
 197 /**
 198  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 199  */
 200 static _EGLSurface *
 201 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 202                         _EGLConfig *conf, void *native_surface,
 203                         const EGLint *attrib_list)
 204 {
 205    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 206    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 207    struct dri2_egl_surface *dri2_surf;
 208    xcb_get_geometry_cookie_t cookie;
 209    xcb_get_geometry_reply_t *reply;
 210    xcb_generic_error_t *error;
 211    xcb_drawable_t drawable;
 212    const __DRIconfig *config;
 213
 214    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 215    drawable = (uintptr_t) native_surface;
 216
 217    (void) drv;
 218
 219    dri2_surf = malloc(sizeof *dri2_surf);
 220    if (!dri2_surf) {
 221       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 222       return NULL;
 223    }
 224
 225    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 226       goto cleanup_surf;
 227
 228    dri2_surf->region = XCB_NONE;
 229    if (type == EGL_PBUFFER_BIT) {
 230       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 231       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 232                        dri2_surf->drawable, dri2_dpy->screen->root,
 233                         dri2_surf->base.Width, dri2_surf->base.Height);
 234    } else {
 235       if (!drawable) {
 236          if (type == EGL_WINDOW_BIT)
 237             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 238          else
 239             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 240          goto cleanup_surf;
 241       }
 242       dri2_surf->drawable = drawable;
 243    }
 244
 245    config = dri2_get_dri_config(dri2_conf, type,
 246                                 dri2_surf->base.GLColorspace);
 247
 248    if (dri2_dpy->dri2) {
 249       dri2_surf->dri_drawable =
 250          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 251                                            dri2_surf);
 252    } else {
 253       assert(dri2_dpy->swrast);
 254       dri2_surf->dri_drawable =
 255          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 256                                              dri2_surf);
 257    }
 258
 259    if (dri2_surf->dri_drawable == NULL) {
 260       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 261       goto cleanup_pixmap;
 262    }
 263
 264    if (type != EGL_PBUFFER_BIT) {
 265       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 266       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 267       if (error != NULL) {
 268          if (error->error_code == BadAlloc)
 269             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 270          else if (type == EGL_WINDOW_BIT)
 271             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 272          else
 273             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 274          free(error);
 275          goto cleanup_dri_drawable;
 276       } else if (reply == NULL) {
 277          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 278          goto cleanup_dri_drawable;
 279       }
 280
 281       dri2_surf->base.Width = reply->width;
 282       dri2_surf->base.Height = reply->height;
 283       dri2_surf->depth = reply->depth;
 284       free(reply);
 285    }
 286
 287    if (dri2_dpy->dri2) {
 288       xcb_void_cookie_t cookie;
 289       int conn_error;
 290
 291       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 292                                                 dri2_surf->drawable);
 293       error = xcb_request_check(dri2_dpy->conn, cookie);
 294       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 295       if (conn_error || error != NULL) {
 296          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 297             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 298          else if (type == EGL_WINDOW_BIT)
 299             _eglError(EGL_BAD_NATIVE_WINDOW,
 300                       "xcb_dri2_create_drawable_checked");
 301          else
 302             _eglError(EGL_BAD_NATIVE_PIXMAP,
 303                       "xcb_dri2_create_drawable_checked");
 304          free(error);
 305          goto cleanup_dri_drawable;
 306       }
 307    } else {
 308       if (type == EGL_PBUFFER_BIT) {
 309          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 310       }
 311       swrastCreateDrawable(dri2_dpy, dri2_surf);
 312    }
 313
 314    /* we always copy the back buffer to front */
 315    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 316
 317    return &dri2_surf->base;
 318
 319  cleanup_dri_drawable:
 320    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 321  cleanup_pixmap:
 322    if (type == EGL_PBUFFER_BIT)
 323       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 324  cleanup_surf:
 325    free(dri2_surf);
 326
 327    return NULL;
 328 }
 329
 330 /**
 331  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 332  */
 333 static _EGLSurface *
 334 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 335                                _EGLConfig *conf, void *native_window,
 336                                const EGLint *attrib_list)
 337 {
 338    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 339    _EGLSurface *surf;
 340
 341    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 342                                   native_window, attrib_list);
 343    if (surf != NULL) {
 344       /* When we first create the DRI2 drawable, its swap interval on the
 345        * server side is 1.
 346        */
 347       surf->SwapInterval = 1;
 348
 349       /* Override that with a driconf-set value. */
 350       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 351    }
 352
 353    return surf;
 354 }
 355
 356 static _EGLSurface *
 357 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 358                                _EGLConfig *conf, void *native_pixmap,
 359                                const EGLint *attrib_list)
 360 {
 361    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 362                                   native_pixmap, attrib_list);
 363 }
 364
 365 static _EGLSurface *
 366 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 367                                 _EGLConfig *conf, const EGLint *attrib_list)
 368 {
 369    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 370                                   XCB_WINDOW_NONE, attrib_list);
 371 }
 372
 373 static EGLBoolean
 374 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 375 {
 376    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 377    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 378
 379    (void) drv;
 380
 381    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 382
 383    if (dri2_dpy->dri2) {
 384       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 385    } else {
 386       assert(dri2_dpy->swrast);
 387       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 388    }
 389
 390    if (surf->Type == EGL_PBUFFER_BIT)
 391       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 392
 393    free(surf);
 394
 395    return EGL_TRUE;
 396 }
 397
 398 /**
 399  * Function utilizes swrastGetDrawableInfo to get surface
 400  * geometry from x server and calls default query surface
 401  * implementation that returns the updated values.
 402  *
 403  * In case of errors we still return values that we currently
 404  * have.
 405  */
 406 static EGLBoolean
 407 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 408                    _EGLSurface *surf, EGLint attribute,
 409                    EGLint *value)
 410 {
 411    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 412    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 413    int x, y, w = -1, h = -1;
 414
 415    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 416
 417    switch (attribute) {
 418    case EGL_WIDTH:
 419    case EGL_HEIGHT:
 420       swrastGetDrawableInfo(drawable, &x, &y, &w, &h, dri2_surf);
 421       if (w != -1 && h != -1) {
 422          surf->Width = w;
 423          surf->Height = h;
 424       }
 425       break;
 426    default:
 427       break;
 428    }
 429    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 430 }
 431
 432 /**
 433  * Process list of buffer received from the server
 434  *
 435  * Processes the list of buffers received in a reply from the server to either
 436  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 437  */
 438 static void
 439 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 440                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 441 {
 442    struct dri2_egl_display *dri2_dpy =
 443       dri2_egl_display(dri2_surf->base.Resource.Display);
 444    xcb_rectangle_t rectangle;
 445
 446    dri2_surf->buffer_count = count;
 447    dri2_surf->have_fake_front = false;
 448
 449    /* This assumes the DRI2 buffer attachment tokens matches the
 450     * __DRIbuffer tokens. */
 451    for (unsigned 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 = true;
 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 config_count = 0;
 733    EGLint surface_type;
 734
 735    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 736
 737    surface_type =
 738       EGL_WINDOW_BIT |
 739       EGL_PIXMAP_BIT |
 740       EGL_PBUFFER_BIT;
 741
 742    if (supports_preserved)
 743       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 744
 745    while (d.rem > 0) {
 746       EGLBoolean class_added[6] = { 0, };
 747
 748       visuals = xcb_depth_visuals(d.data);
 749
 750       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 751          if (class_added[visuals[i]._class])
 752             continue;
 753
 754          class_added[visuals[i]._class] = EGL_TRUE;
 755
 756          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 757             struct dri2_egl_config *dri2_conf;
 758             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 759
 760             const EGLint config_attrs[] = {
 761                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 762                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 763                     EGL_NONE
 764             };
 765
 766             unsigned int rgba_masks[4] = {
 767                visuals[i].red_mask,
 768                visuals[i].green_mask,
 769                visuals[i].blue_mask,
 770                0,
 771             };
 772
 773             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 774                                         surface_type, config_attrs,
 775                                         rgba_masks);
 776             if (dri2_conf)
 777                if (dri2_conf->base.ConfigID == config_count + 1)
 778                   config_count++;
 779
 780             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 781              * Otherwise it will only match a 32-bit RGBA visual.  On a
 782              * composited window manager on X11, this will make all of the
 783              * EGLConfigs with destination alpha get blended by the
 784              * compositor.  This is probably not what the application
 785              * wants... especially on drivers that only have 32-bit RGBA
 786              * EGLConfigs! */
 787             if (d.data->depth == 24) {
 788                rgba_masks[3] =
 789                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 790                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 791                                            surface_type, config_attrs,
 792                                            rgba_masks);
 793                if (dri2_conf)
 794                   if (dri2_conf->base.ConfigID == config_count + 1)
 795                      config_count++;
 796             }
 797          }
 798       }
 799
 800       xcb_depth_next(&d);
 801    }
 802
 803    if (!config_count) {
 804       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 805       return EGL_FALSE;
 806    }
 807
 808    return EGL_TRUE;
 809 }
 810
 811 static EGLBoolean
 812 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 813                  _EGLSurface *draw, xcb_xfixes_region_t region)
 814 {
 815    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 816    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 817    enum xcb_dri2_attachment_t render_attachment;
 818    xcb_dri2_copy_region_cookie_t cookie;
 819
 820    /* No-op for a pixmap or pbuffer surface */
 821    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 822       return EGL_TRUE;
 823
 824    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 825
 826    if (dri2_surf->have_fake_front)
 827       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 828    else
 829       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 830
 831    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 832                                            dri2_surf->drawable,
 833                                            region,
 834                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 835                                            render_attachment);
 836    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 837
 838    return EGL_TRUE;
 839 }
 840
 841 static int64_t
 842 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 843                           int64_t msc, int64_t divisor, int64_t remainder)
 844 {
 845    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 846    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 847    uint32_t msc_hi = msc >> 32;
 848    uint32_t msc_lo = msc & 0xffffffff;
 849    uint32_t divisor_hi = divisor >> 32;
 850    uint32_t divisor_lo = divisor & 0xffffffff;
 851    uint32_t remainder_hi = remainder >> 32;
 852    uint32_t remainder_lo = remainder & 0xffffffff;
 853    xcb_dri2_swap_buffers_cookie_t cookie;
 854    xcb_dri2_swap_buffers_reply_t *reply;
 855    int64_t swap_count = -1;
 856
 857    /* No-op for a pixmap or pbuffer surface */
 858    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 859       return 0;
 860
 861    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 862       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 863
 864    dri2_flush_drawable_for_swapbuffers(disp, draw);
 865
 866    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 867                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 868
 869    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 870
 871    if (reply) {
 872       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 873       free(reply);
 874    }
 875
 876    /* Since we aren't watching for the server's invalidate events like we're
 877     * supposed to (due to XCB providing no mechanism for filtering the events
 878     * the way xlib does), and SwapBuffers is a common cause of invalidate
 879     * events, just shove one down to the driver, even though we haven't told
 880     * the driver that we're the kind of loader that provides reliable
 881     * invalidate events.  This causes the driver to request buffers again at
 882     * its next draw, so that we get the correct buffers if a pageflip
 883     * happened.  The driver should still be using the viewport hack to catch
 884     * window resizes.
 885     */
 886    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 887       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 888
 889    return swap_count;
 890 }
 891
 892 static EGLBoolean
 893 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 894 {
 895    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 896    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 897
 898    if (!dri2_dpy->flush) {
 899       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 900       return EGL_TRUE;
 901    }
 902
 903    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 904       /* Swap failed with a window drawable. */
 905       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 906    }
 907    return EGL_TRUE;
 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
 921    if (numRects > (int)ARRAY_SIZE(rectangles))
 922       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 923
 924    for (int i = 0; i < numRects; i++) {
 925       rectangles[i].x = rects[i * 4];
 926       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 927       rectangles[i].width = rects[i * 4 + 2];
 928       rectangles[i].height = rects[i * 4 + 3];
 929    }
 930
 931    region = xcb_generate_id(dri2_dpy->conn);
 932    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 933    ret = dri2_copy_region(drv, disp, draw, region);
 934    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 935
 936    return ret;
 937 }
 938
 939 static EGLBoolean
 940 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 941                      EGLint x, EGLint y, EGLint width, EGLint height)
 942 {
 943    const EGLint rect[4] = { x, y, width, height };
 944
 945    if (x < 0 || y < 0 || width < 0 || height < 0)
 946       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 947
 948    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 949 }
 950
 951 static EGLBoolean
 952 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 953                        EGLint interval)
 954 {
 955    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 956    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 957
 958    if (interval > surf->Config->MaxSwapInterval)
 959       interval = surf->Config->MaxSwapInterval;
 960    else if (interval < surf->Config->MinSwapInterval)
 961       interval = surf->Config->MinSwapInterval;
 962
 963    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 964       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 965
 966    surf->SwapInterval = interval;
 967
 968    return EGL_TRUE;
 969 }
 970
 971 static EGLBoolean
 972 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 973                       void *native_pixmap_target)
 974 {
 975    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 976    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 977    xcb_gcontext_t gc;
 978    xcb_pixmap_t target;
 979
 980    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 981    target = (uintptr_t) native_pixmap_target;
 982
 983    (void) drv;
 984
 985    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 986
 987    gc = xcb_generate_id(dri2_dpy->conn);
 988    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 989    xcb_copy_area(dri2_dpy->conn,
 990                   dri2_surf->drawable,
 991                   target,
 992                   gc,
 993                   0, 0,
 994                   0, 0,
 995                   dri2_surf->base.Width,
 996                   dri2_surf->base.Height);
 997    xcb_free_gc(dri2_dpy->conn, gc);
 998
 999    return EGL_TRUE;
1000 }
1001
1002 static _EGLImage *
1003 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1004                              EGLClientBuffer buffer, const EGLint *attr_list)
1005 {
1006    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1007    struct dri2_egl_image *dri2_img;
1008    unsigned int attachments[1];
1009    xcb_drawable_t drawable;
1010    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1011    xcb_dri2_get_buffers_reply_t *buffers_reply;
1012    xcb_dri2_dri2_buffer_t *buffers;
1013    xcb_get_geometry_cookie_t geometry_cookie;
1014    xcb_get_geometry_reply_t *geometry_reply;
1015    xcb_generic_error_t *error;
1016    int stride, format;
1017
1018    (void) ctx;
1019
1020    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1021    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1022    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1023    buffers_cookie =
1024       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1025                                       drawable, 1, 1, attachments);
1026    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1027    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1028                                                buffers_cookie, NULL);
1029    if (buffers_reply == NULL)
1030      return NULL;
1031
1032    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1033    if (buffers == NULL) {
1034       return NULL;
1035    }
1036
1037    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1038                                             geometry_cookie, &error);
1039    if (geometry_reply == NULL || error != NULL) {
1040       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1041       free(error);
1042       free(buffers_reply);
1043       return NULL;
1044    }
1045
1046    switch (geometry_reply->depth) {
1047    case 16:
1048       format = __DRI_IMAGE_FORMAT_RGB565;
1049       break;
1050    case 24:
1051       format = __DRI_IMAGE_FORMAT_XRGB8888;
1052       break;
1053    case 32:
1054       format = __DRI_IMAGE_FORMAT_ARGB8888;
1055       break;
1056    default:
1057       _eglError(EGL_BAD_PARAMETER,
1058                 "dri2_create_image_khr: unsupported pixmap depth");
1059       free(buffers_reply);
1060       free(geometry_reply);
1061       return NULL;
1062    }
1063
1064    dri2_img = malloc(sizeof *dri2_img);
1065    if (!dri2_img) {
1066       free(buffers_reply);
1067       free(geometry_reply);
1068       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1069       return EGL_NO_IMAGE_KHR;
1070    }
1071
1072    _eglInitImage(&dri2_img->base, disp);
1073
1074    stride = buffers[0].pitch / buffers[0].cpp;
1075    dri2_img->dri_image =
1076       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1077                                            buffers_reply->width,
1078                                            buffers_reply->height,
1079                                            format,
1080                                            buffers[0].name,
1081                                            stride,
1082                                            dri2_img);
1083
1084    free(buffers_reply);
1085    free(geometry_reply);
1086
1087    return &dri2_img->base;
1088 }
1089
1090 static _EGLImage *
1091 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1092                           _EGLContext *ctx, EGLenum target,
1093                           EGLClientBuffer buffer, const EGLint *attr_list)
1094 {
1095    (void) drv;
1096
1097    switch (target) {
1098    case EGL_NATIVE_PIXMAP_KHR:
1099       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1100    default:
1101       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1102    }
1103 }
1104
1105 static EGLBoolean
1106 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1107                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1108                          EGLuint64KHR *sbc)
1109 {
1110    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1111    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1112    xcb_dri2_get_msc_cookie_t cookie;
1113    xcb_dri2_get_msc_reply_t *reply;
1114
1115    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1116    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1117
1118    if (!reply)
1119       return _eglError(EGL_BAD_ACCESS, __func__);
1120
1121    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1122    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1123    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1124    free(reply);
1125
1126    return EGL_TRUE;
1127 }
1128
1129 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1130    .authenticate = NULL,
1131    .create_window_surface = dri2_x11_create_window_surface,
1132    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1133    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1134    .destroy_surface = dri2_x11_destroy_surface,
1135    .create_image = dri2_fallback_create_image_khr,
1136    .swap_interval = dri2_fallback_swap_interval,
1137    .swap_buffers = dri2_x11_swap_buffers,
1138    .set_damage_region = dri2_fallback_set_damage_region,
1139    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1140    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1141    .copy_buffers = dri2_x11_copy_buffers,
1142    .query_buffer_age = dri2_fallback_query_buffer_age,
1143    .query_surface = dri2_query_surface,
1144    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1145    .get_sync_values = dri2_fallback_get_sync_values,
1146    .get_dri_drawable = dri2_surface_get_dri_drawable,
1147 };
1148
1149 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1150    .authenticate = dri2_x11_authenticate,
1151    .create_window_surface = dri2_x11_create_window_surface,
1152    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1153    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1154    .destroy_surface = dri2_x11_destroy_surface,
1155    .create_image = dri2_x11_create_image_khr,
1156    .swap_interval = dri2_x11_swap_interval,
1157    .swap_buffers = dri2_x11_swap_buffers,
1158    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1159    .swap_buffers_region = dri2_x11_swap_buffers_region,
1160    .set_damage_region = dri2_fallback_set_damage_region,
1161    .post_sub_buffer = dri2_x11_post_sub_buffer,
1162    .copy_buffers = dri2_x11_copy_buffers,
1163    .query_buffer_age = dri2_fallback_query_buffer_age,
1164    .query_surface = dri2_query_surface,
1165    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1166    .get_sync_values = dri2_x11_get_sync_values,
1167    .get_dri_drawable = dri2_surface_get_dri_drawable,
1168 };
1169
1170 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1171    .base = { __DRI_SWRAST_LOADER, 1 },
1172
1173    .getDrawableInfo = swrastGetDrawableInfo,
1174    .putImage        = swrastPutImage,
1175    .getImage        = swrastGetImage,
1176 };
1177
1178 static const __DRIextension *swrast_loader_extensions[] = {
1179    &swrast_loader_extension.base,
1180    NULL,
1181 };
1182
1183 static EGLBoolean
1184 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1185                         struct dri2_egl_display *dri2_dpy)
1186 {
1187    xcb_screen_iterator_t s;
1188    int screen = (uintptr_t)disp->Options.Platform;
1189    const char *msg;
1190
1191    disp->DriverData = (void *) dri2_dpy;
1192    if (disp->PlatformDisplay == NULL) {
1193       dri2_dpy->conn = xcb_connect(NULL, &screen);
1194       dri2_dpy->own_device = true;
1195    } else {
1196       Display *dpy = disp->PlatformDisplay;
1197
1198       dri2_dpy->conn = XGetXCBConnection(dpy);
1199       screen = DefaultScreen(dpy);
1200    }
1201
1202    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1203       msg = "xcb_connect failed";
1204       goto disconnect;
1205    }
1206
1207    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1208    dri2_dpy->screen = get_xcb_screen(s, screen);
1209    if (!dri2_dpy->screen) {
1210       msg = "failed to get xcb screen";
1211       goto disconnect;
1212    }
1213
1214    return EGL_TRUE;
1215 disconnect:
1216    if (disp->PlatformDisplay == NULL)
1217       xcb_disconnect(dri2_dpy->conn);
1218
1219    return _eglError(EGL_BAD_ALLOC, msg);
1220 }
1221
1222 static EGLBoolean
1223 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1224 {
1225    struct dri2_egl_display *dri2_dpy;
1226
1227    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1228    if (!dri2_dpy)
1229       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1230
1231    dri2_dpy->fd = -1;
1232    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1233       goto cleanup;
1234
1235    /*
1236     * Every hardware driver_name is set using strdup. Doing the same in
1237     * here will allow is to simply free the memory at dri2_terminate().
1238     */
1239    dri2_dpy->driver_name = strdup("swrast");
1240    if (!dri2_load_driver_swrast(disp))
1241       goto cleanup;
1242
1243    dri2_dpy->loader_extensions = swrast_loader_extensions;
1244
1245    if (!dri2_create_screen(disp))
1246       goto cleanup;
1247
1248    if (!dri2_setup_extensions(disp))
1249       goto cleanup;
1250
1251    dri2_setup_screen(disp);
1252
1253    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1254       goto cleanup;
1255
1256    /* Fill vtbl last to prevent accidentally calling virtual function during
1257     * initialization.
1258     */
1259    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1260
1261    return EGL_TRUE;
1262
1263  cleanup:
1264    dri2_display_destroy(disp);
1265    return EGL_FALSE;
1266 }
1267
1268 static void
1269 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1270 {
1271    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1272    int arbitrary_max_interval = 1000;
1273
1274    /* default behavior for no SwapBuffers support: no vblank syncing
1275     * either.
1276     */
1277    dri2_dpy->min_swap_interval = 0;
1278    dri2_dpy->max_swap_interval = 0;
1279
1280    if (!dri2_dpy->swap_available)
1281       return;
1282
1283    /* If we do have swapbuffers, then we can support pretty much any swap
1284     * interval, but we allow driconf to override applications.
1285     */
1286    if (dri2_dpy->config)
1287       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1288                                      "vblank_mode", &vblank_mode);
1289    switch (vblank_mode) {
1290    case DRI_CONF_VBLANK_NEVER:
1291       dri2_dpy->min_swap_interval = 0;
1292       dri2_dpy->max_swap_interval = 0;
1293       dri2_dpy->default_swap_interval = 0;
1294       break;
1295    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1296       dri2_dpy->min_swap_interval = 1;
1297       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1298       dri2_dpy->default_swap_interval = 1;
1299       break;
1300    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1301       dri2_dpy->min_swap_interval = 0;
1302       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1303       dri2_dpy->default_swap_interval = 0;
1304       break;
1305    default:
1306    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1307       dri2_dpy->min_swap_interval = 0;
1308       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1309       dri2_dpy->default_swap_interval = 1;
1310       break;
1311    }
1312 }
1313
1314 #ifdef HAVE_DRI3
1315
1316 static const __DRIextension *dri3_image_loader_extensions[] = {
1317    &dri3_image_loader_extension.base,
1318    &image_lookup_extension.base,
1319    &use_invalidate.base,
1320    NULL,
1321 };
1322
1323 static EGLBoolean
1324 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1325 {
1326    struct dri2_egl_display *dri2_dpy;
1327
1328    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1329    if (!dri2_dpy)
1330       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1331
1332    dri2_dpy->fd = -1;
1333    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1334       goto cleanup;
1335
1336    if (!dri3_x11_connect(dri2_dpy))
1337       goto cleanup;
1338
1339    if (!dri2_load_driver_dri3(disp))
1340       goto cleanup;
1341
1342    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1343
1344    dri2_dpy->swap_available = true;
1345    dri2_dpy->invalidate_available = true;
1346
1347    if (!dri2_create_screen(disp))
1348       goto cleanup;
1349
1350    if (!dri2_setup_extensions(disp))
1351       goto cleanup;
1352
1353    dri2_setup_screen(disp);
1354
1355    dri2_x11_setup_swap_interval(dri2_dpy);
1356
1357    if (!dri2_dpy->is_different_gpu)
1358       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1359    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1360    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1361    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1362
1363    dri2_set_WL_bind_wayland_display(drv, disp);
1364
1365    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1366       goto cleanup;
1367
1368    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1369    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1370    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1371    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1372    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1373    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1374
1375    /* Fill vtbl last to prevent accidentally calling virtual function during
1376     * initialization.
1377     */
1378    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1379
1380    _eglLog(_EGL_INFO, "Using DRI3");
1381
1382    return EGL_TRUE;
1383
1384  cleanup:
1385    dri2_display_destroy(disp);
1386    return EGL_FALSE;
1387 }
1388 #endif
1389
1390 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1391    .base = { __DRI_DRI2_LOADER, 2 },
1392
1393    .getBuffers           = dri2_x11_get_buffers,
1394    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1395    .getBuffersWithFormat = NULL,
1396 };
1397
1398 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1399    .base = { __DRI_DRI2_LOADER, 3 },
1400
1401    .getBuffers           = dri2_x11_get_buffers,
1402    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1403    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1404 };
1405
1406 static const __DRIextension *dri2_loader_extensions_old[] = {
1407    &dri2_loader_extension_old.base,
1408    &image_lookup_extension.base,
1409    &background_callable_extension.base,
1410    NULL,
1411 };
1412
1413 static const __DRIextension *dri2_loader_extensions[] = {
1414    &dri2_loader_extension.base,
1415    &image_lookup_extension.base,
1416    &background_callable_extension.base,
1417    NULL,
1418 };
1419
1420 static EGLBoolean
1421 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1422 {
1423    struct dri2_egl_display *dri2_dpy;
1424
1425    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1426    if (!dri2_dpy)
1427       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1428
1429    dri2_dpy->fd = -1;
1430    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1431       goto cleanup;
1432
1433    if (!dri2_x11_connect(dri2_dpy))
1434       goto cleanup;
1435
1436    if (!dri2_load_driver(disp))
1437       goto cleanup;
1438
1439    if (dri2_dpy->dri2_minor >= 1)
1440       dri2_dpy->loader_extensions = dri2_loader_extensions;
1441    else
1442       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1443
1444    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1445    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1446
1447    if (!dri2_create_screen(disp))
1448       goto cleanup;
1449
1450    if (!dri2_setup_extensions(disp))
1451       goto cleanup;
1452
1453    dri2_setup_screen(disp);
1454
1455    dri2_x11_setup_swap_interval(dri2_dpy);
1456
1457    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1458    disp->Extensions.NOK_swap_region = EGL_TRUE;
1459    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1460    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1461    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1462
1463    dri2_set_WL_bind_wayland_display(drv, disp);
1464
1465    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1466       goto cleanup;
1467
1468    /* Fill vtbl last to prevent accidentally calling virtual function during
1469     * initialization.
1470     */
1471    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1472
1473    _eglLog(_EGL_INFO, "Using DRI2");
1474
1475    return EGL_TRUE;
1476
1477  cleanup:
1478    dri2_display_destroy(disp);
1479    return EGL_FALSE;
1480 }
1481
1482 EGLBoolean
1483 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1484 {
1485    EGLBoolean initialized = EGL_FALSE;
1486
1487    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1488 #ifdef HAVE_DRI3
1489       if (!getenv("LIBGL_DRI3_DISABLE"))
1490          initialized = dri2_initialize_x11_dri3(drv, disp);
1491 #endif
1492
1493       if (!initialized)
1494          initialized = dri2_initialize_x11_dri2(drv, disp);
1495    }
1496
1497    if (!initialized)
1498       initialized = dri2_initialize_x11_swrast(drv, disp);
1499
1500    return initialized;
1501 }
1502