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_screen_iterator_t s;
 210    xcb_generic_error_t *error;
 211    xcb_drawable_t drawable;
 212    xcb_screen_t *screen;
 213    const __DRIconfig *config;
 214
 215    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 216    drawable = (uintptr_t) native_surface;
 217
 218    (void) drv;
 219
 220    dri2_surf = malloc(sizeof *dri2_surf);
 221    if (!dri2_surf) {
 222       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 223       return NULL;
 224    }
 225
 226    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 227       goto cleanup_surf;
 228
 229    dri2_surf->region = XCB_NONE;
 230    if (type == EGL_PBUFFER_BIT) {
 231       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 232       screen = get_xcb_screen(s, dri2_dpy->screen);
 233       if (!screen) {
 234          _eglError(EGL_BAD_ALLOC, "failed to get xcb screen");
 235          goto cleanup_surf;
 236       }
 237
 238       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 239       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 240                        dri2_surf->drawable, screen->root,
 241                         dri2_surf->base.Width, dri2_surf->base.Height);
 242    } else {
 243       if (!drawable) {
 244          if (type == EGL_WINDOW_BIT)
 245             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 246          else
 247             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 248          goto cleanup_surf;
 249       }
 250       dri2_surf->drawable = drawable;
 251    }
 252
 253    config = dri2_get_dri_config(dri2_conf, type,
 254                                 dri2_surf->base.GLColorspace);
 255
 256    if (dri2_dpy->dri2) {
 257       dri2_surf->dri_drawable =
 258          (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 259                                               dri2_surf);
 260    } else {
 261       assert(dri2_dpy->swrast);
 262       dri2_surf->dri_drawable =
 263          (*dri2_dpy->swrast->createNewDrawable)(dri2_dpy->dri_screen, config,
 264                                                 dri2_surf);
 265    }
 266
 267    if (dri2_surf->dri_drawable == NULL) {
 268       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 269       goto cleanup_pixmap;
 270    }
 271
 272    if (type != EGL_PBUFFER_BIT) {
 273       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 274       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 275       if (error != NULL) {
 276          if (error->error_code == BadAlloc)
 277             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 278          else if (type == EGL_WINDOW_BIT)
 279             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 280          else
 281             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 282          free(error);
 283          goto cleanup_dri_drawable;
 284       } else if (reply == NULL) {
 285          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 286          goto cleanup_dri_drawable;
 287       }
 288
 289       dri2_surf->base.Width = reply->width;
 290       dri2_surf->base.Height = reply->height;
 291       dri2_surf->depth = reply->depth;
 292       free(reply);
 293    }
 294
 295    if (dri2_dpy->dri2) {
 296       xcb_void_cookie_t cookie;
 297       int conn_error;
 298
 299       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 300                                                 dri2_surf->drawable);
 301       error = xcb_request_check(dri2_dpy->conn, cookie);
 302       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 303       if (conn_error || error != NULL) {
 304          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 305             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 306          else if (type == EGL_WINDOW_BIT)
 307             _eglError(EGL_BAD_NATIVE_WINDOW,
 308                       "xcb_dri2_create_drawable_checked");
 309          else
 310             _eglError(EGL_BAD_NATIVE_PIXMAP,
 311                       "xcb_dri2_create_drawable_checked");
 312          free(error);
 313          goto cleanup_dri_drawable;
 314       }
 315    } else {
 316       if (type == EGL_PBUFFER_BIT) {
 317          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 318       }
 319       swrastCreateDrawable(dri2_dpy, dri2_surf);
 320    }
 321
 322    /* we always copy the back buffer to front */
 323    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 324
 325    return &dri2_surf->base;
 326
 327  cleanup_dri_drawable:
 328    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 329  cleanup_pixmap:
 330    if (type == EGL_PBUFFER_BIT)
 331       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 332  cleanup_surf:
 333    free(dri2_surf);
 334
 335    return NULL;
 336 }
 337
 338 /**
 339  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 340  */
 341 static _EGLSurface *
 342 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 343                                _EGLConfig *conf, void *native_window,
 344                                const EGLint *attrib_list)
 345 {
 346    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 347    _EGLSurface *surf;
 348
 349    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 350                                   native_window, attrib_list);
 351    if (surf != NULL) {
 352       /* When we first create the DRI2 drawable, its swap interval on the
 353        * server side is 1.
 354        */
 355       surf->SwapInterval = 1;
 356
 357       /* Override that with a driconf-set value. */
 358       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 359    }
 360
 361    return surf;
 362 }
 363
 364 static _EGLSurface *
 365 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 366                                _EGLConfig *conf, void *native_pixmap,
 367                                const EGLint *attrib_list)
 368 {
 369    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 370                                   native_pixmap, attrib_list);
 371 }
 372
 373 static _EGLSurface *
 374 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 375                                 _EGLConfig *conf, const EGLint *attrib_list)
 376 {
 377    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 378                                   XCB_WINDOW_NONE, attrib_list);
 379 }
 380
 381 static EGLBoolean
 382 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 383 {
 384    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 385    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 386
 387    (void) drv;
 388
 389    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 390
 391    if (dri2_dpy->dri2) {
 392       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 393    } else {
 394       assert(dri2_dpy->swrast);
 395       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 396    }
 397
 398    if (surf->Type == EGL_PBUFFER_BIT)
 399       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 400
 401    free(surf);
 402
 403    return EGL_TRUE;
 404 }
 405
 406 /**
 407  * Process list of buffer received from the server
 408  *
 409  * Processes the list of buffers received in a reply from the server to either
 410  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 411  */
 412 static void
 413 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 414                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 415 {
 416    struct dri2_egl_display *dri2_dpy =
 417       dri2_egl_display(dri2_surf->base.Resource.Display);
 418    xcb_rectangle_t rectangle;
 419    unsigned i;
 420
 421    dri2_surf->buffer_count = count;
 422    dri2_surf->have_fake_front = 0;
 423
 424    /* This assumes the DRI2 buffer attachment tokens matches the
 425     * __DRIbuffer tokens. */
 426    for (i = 0; i < count; i++) {
 427       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 428       dri2_surf->buffers[i].name = buffers[i].name;
 429       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 430       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 431       dri2_surf->buffers[i].flags = buffers[i].flags;
 432
 433       /* We only use the DRI drivers single buffer configs.  This
 434        * means that if we try to render to a window, DRI2 will give us
 435        * the fake front buffer, which we'll use as a back buffer.
 436        * Note that EGL doesn't require that several clients rendering
 437        * to the same window must see the same aux buffers. */
 438       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 439          dri2_surf->have_fake_front = 1;
 440    }
 441
 442    if (dri2_surf->region != XCB_NONE)
 443       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 444
 445    rectangle.x = 0;
 446    rectangle.y = 0;
 447    rectangle.width = dri2_surf->base.Width;
 448    rectangle.height = dri2_surf->base.Height;
 449    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 450    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 451 }
 452
 453 static __DRIbuffer *
 454 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 455                      int *width, int *height,
 456                      unsigned int *attachments, int count,
 457                      int *out_count, void *loaderPrivate)
 458 {
 459    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 460    struct dri2_egl_display *dri2_dpy =
 461       dri2_egl_display(dri2_surf->base.Resource.Display);
 462    xcb_dri2_dri2_buffer_t *buffers;
 463    xcb_dri2_get_buffers_reply_t *reply;
 464    xcb_dri2_get_buffers_cookie_t cookie;
 465
 466    (void) driDrawable;
 467
 468    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 469                                             dri2_surf->drawable,
 470                                             count, count, attachments);
 471    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 472    if (reply == NULL)
 473       return NULL;
 474    buffers = xcb_dri2_get_buffers_buffers (reply);
 475    if (buffers == NULL)
 476       return NULL;
 477
 478    *out_count = reply->count;
 479    dri2_surf->base.Width = *width = reply->width;
 480    dri2_surf->base.Height = *height = reply->height;
 481    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 482
 483    free(reply);
 484
 485    return dri2_surf->buffers;
 486 }
 487
 488 static __DRIbuffer *
 489 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 490                                  int *width, int *height,
 491                                  unsigned int *attachments, int count,
 492                                  int *out_count, void *loaderPrivate)
 493 {
 494    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 495    struct dri2_egl_display *dri2_dpy =
 496       dri2_egl_display(dri2_surf->base.Resource.Display);
 497    xcb_dri2_dri2_buffer_t *buffers;
 498    xcb_dri2_get_buffers_with_format_reply_t *reply;
 499    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 500    xcb_dri2_attach_format_t *format_attachments;
 501
 502    (void) driDrawable;
 503
 504    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 505    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 506                                                         dri2_surf->drawable,
 507                                                         count, count,
 508                                                         format_attachments);
 509
 510    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 511                                                    cookie, NULL);
 512    if (reply == NULL)
 513       return NULL;
 514
 515    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 516    dri2_surf->base.Width = *width = reply->width;
 517    dri2_surf->base.Height = *height = reply->height;
 518    *out_count = reply->count;
 519    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 520
 521    free(reply);
 522
 523    return dri2_surf->buffers;
 524 }
 525
 526 static void
 527 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 528 {
 529    (void) driDrawable;
 530
 531    /* FIXME: Does EGL support front buffer rendering at all? */
 532
 533 #if 0
 534    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 535
 536    dri2WaitGL(dri2_surf);
 537 #else
 538    (void) loaderPrivate;
 539 #endif
 540 }
 541
 542 static int
 543 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 544 {
 545    xcb_dri2_authenticate_reply_t *authenticate;
 546    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 547    xcb_screen_iterator_t s;
 548    xcb_screen_t *screen;
 549    int ret = 0;
 550
 551    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 552
 553    screen = get_xcb_screen(s, dri2_dpy->screen);
 554    if (!screen) {
 555       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 556       return -1;
 557    }
 558
 559    authenticate_cookie =
 560       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 561    authenticate =
 562       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 563
 564    if (authenticate == NULL || !authenticate->authenticated)
 565       ret = -1;
 566
 567    free(authenticate);
 568
 569    return ret;
 570 }
 571
 572 static EGLBoolean
 573 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 574 {
 575 #ifdef HAVE_LIBDRM
 576    drm_magic_t magic;
 577
 578    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 579       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 580       return EGL_FALSE;
 581    }
 582
 583    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 584       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 585       return EGL_FALSE;
 586    }
 587 #endif
 588    return EGL_TRUE;
 589 }
 590
 591 static EGLBoolean
 592 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 593 {
 594    xcb_xfixes_query_version_reply_t *xfixes_query;
 595    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 596    xcb_dri2_query_version_reply_t *dri2_query;
 597    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 598    xcb_dri2_connect_reply_t *connect;
 599    xcb_dri2_connect_cookie_t connect_cookie;
 600    xcb_generic_error_t *error;
 601    xcb_screen_iterator_t s;
 602    xcb_screen_t *screen;
 603    char *driver_name, *loader_driver_name, *device_name;
 604    const xcb_query_extension_reply_t *extension;
 605
 606    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 607    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 608
 609    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 610    if (!(extension && extension->present))
 611       return EGL_FALSE;
 612
 613    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 614    if (!(extension && extension->present))
 615       return EGL_FALSE;
 616
 617    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 618                                                   XCB_XFIXES_MAJOR_VERSION,
 619                                                   XCB_XFIXES_MINOR_VERSION);
 620
 621    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 622                                                XCB_DRI2_MAJOR_VERSION,
 623                                                XCB_DRI2_MINOR_VERSION);
 624
 625    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 626    screen = get_xcb_screen(s, dri2_dpy->screen);
 627    if (!screen) {
 628       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 629       return EGL_FALSE;
 630    }
 631    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 632                                    XCB_DRI2_DRIVER_TYPE_DRI);
 633
 634    xfixes_query =
 635       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 636                                       xfixes_query_cookie, &error);
 637    if (xfixes_query == NULL ||
 638        error != NULL || xfixes_query->major_version < 2) {
 639       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 640       free(error);
 641       return EGL_FALSE;
 642    }
 643    free(xfixes_query);
 644
 645    dri2_query =
 646       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 647    if (dri2_query == NULL || error != NULL) {
 648       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 649       free(error);
 650       return EGL_FALSE;
 651    }
 652    dri2_dpy->dri2_major = dri2_query->major_version;
 653    dri2_dpy->dri2_minor = dri2_query->minor_version;
 654    free(dri2_query);
 655
 656    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 657    if (connect == NULL ||
 658        connect->driver_name_length + connect->device_name_length == 0) {
 659       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 660       return EGL_FALSE;
 661    }
 662
 663    device_name = xcb_dri2_connect_device_name (connect);
 664
 665    dri2_dpy->fd = loader_open_device(device_name);
 666    if (dri2_dpy->fd == -1) {
 667       _eglLog(_EGL_WARNING,
 668               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 669       free(connect);
 670       return EGL_FALSE;
 671    }
 672
 673    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 674       close(dri2_dpy->fd);
 675       free(connect);
 676       return EGL_FALSE;
 677    }
 678
 679    driver_name = xcb_dri2_connect_driver_name (connect);
 680
 681    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 682     * Otherwise, default to the server's value.
 683     */
 684    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 685    if (loader_driver_name) {
 686       dri2_dpy->driver_name = loader_driver_name;
 687    } else {
 688       dri2_dpy->driver_name =
 689          strndup(driver_name,
 690                  xcb_dri2_connect_driver_name_length(connect));
 691    }
 692
 693    if (dri2_dpy->driver_name == NULL) {
 694       close(dri2_dpy->fd);
 695       free(dri2_dpy->driver_name);
 696       free(connect);
 697       return EGL_FALSE;
 698    }
 699
 700 #ifdef HAVE_WAYLAND_PLATFORM
 701    dri2_dpy->device_name =
 702       strndup(device_name,
 703               xcb_dri2_connect_device_name_length(connect));
 704 #endif
 705
 706    free(connect);
 707
 708    return EGL_TRUE;
 709 }
 710
 711 static int
 712 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 713 {
 714    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 715
 716    return dri2_x11_do_authenticate(dri2_dpy, id);
 717 }
 718
 719 static EGLBoolean
 720 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 721                                  _EGLDisplay *disp, bool supports_preserved)
 722 {
 723    xcb_screen_iterator_t s;
 724    xcb_depth_iterator_t d;
 725    xcb_visualtype_t *visuals;
 726    int i, j, id;
 727    unsigned int rgba_masks[4];
 728    EGLint surface_type;
 729    EGLint config_attrs[] = {
 730            EGL_NATIVE_VISUAL_ID,   0,
 731            EGL_NATIVE_VISUAL_TYPE, 0,
 732            EGL_NONE
 733    };
 734
 735    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 736    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 737    id = 1;
 738
 739    surface_type =
 740       EGL_WINDOW_BIT |
 741       EGL_PIXMAP_BIT |
 742       EGL_PBUFFER_BIT;
 743
 744    if (supports_preserved)
 745       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 746
 747    while (d.rem > 0) {
 748       EGLBoolean class_added[6] = { 0, };
 749
 750       visuals = xcb_depth_visuals(d.data);
 751       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 752          if (class_added[visuals[i]._class])
 753             continue;
 754
 755          class_added[visuals[i]._class] = EGL_TRUE;
 756          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 757             config_attrs[1] = visuals[i].visual_id;
 758             config_attrs[3] = visuals[i]._class;
 759
 760             rgba_masks[0] = visuals[i].red_mask;
 761             rgba_masks[1] = visuals[i].green_mask;
 762             rgba_masks[2] = visuals[i].blue_mask;
 763             rgba_masks[3] = 0;
 764             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 765                             surface_type, config_attrs, rgba_masks);
 766
 767             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 768              * Otherwise it will only match a 32-bit RGBA visual.  On a
 769              * composited window manager on X11, this will make all of the
 770              * EGLConfigs with destination alpha get blended by the
 771              * compositor.  This is probably not what the application
 772              * wants... especially on drivers that only have 32-bit RGBA
 773              * EGLConfigs! */
 774             if (d.data->depth == 24) {
 775                rgba_masks[3] =
 776                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 777                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 778                                surface_type, config_attrs, rgba_masks);
 779             }
 780          }
 781       }
 782
 783       xcb_depth_next(&d);
 784    }
 785
 786    if (!_eglGetArraySize(disp->Configs)) {
 787       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 788       return EGL_FALSE;
 789    }
 790
 791    return EGL_TRUE;
 792 }
 793
 794 static EGLBoolean
 795 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 796                  _EGLSurface *draw, xcb_xfixes_region_t region)
 797 {
 798    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 799    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 800    enum xcb_dri2_attachment_t render_attachment;
 801    xcb_dri2_copy_region_cookie_t cookie;
 802
 803    /* No-op for a pixmap or pbuffer surface */
 804    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 805       return EGL_TRUE;
 806
 807    if (dri2_dpy->flush)
 808       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 809
 810    if (dri2_surf->have_fake_front)
 811       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 812    else
 813       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 814
 815    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 816                                            dri2_surf->drawable,
 817                                            region,
 818                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 819                                            render_attachment);
 820    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 821
 822    return EGL_TRUE;
 823 }
 824
 825 static int64_t
 826 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 827                           int64_t msc, int64_t divisor, int64_t remainder)
 828 {
 829    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 830    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 831    uint32_t msc_hi = msc >> 32;
 832    uint32_t msc_lo = msc & 0xffffffff;
 833    uint32_t divisor_hi = divisor >> 32;
 834    uint32_t divisor_lo = divisor & 0xffffffff;
 835    uint32_t remainder_hi = remainder >> 32;
 836    uint32_t remainder_lo = remainder & 0xffffffff;
 837    xcb_dri2_swap_buffers_cookie_t cookie;
 838    xcb_dri2_swap_buffers_reply_t *reply;
 839    int64_t swap_count = -1;
 840
 841    /* No-op for a pixmap or pbuffer surface */
 842    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 843       return 0;
 844
 845    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 846       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 847
 848    dri2_flush_drawable_for_swapbuffers(disp, draw);
 849
 850    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 851                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 852
 853    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 854
 855    if (reply) {
 856       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 857       free(reply);
 858    }
 859
 860    /* Since we aren't watching for the server's invalidate events like we're
 861     * supposed to (due to XCB providing no mechanism for filtering the events
 862     * the way xlib does), and SwapBuffers is a common cause of invalidate
 863     * events, just shove one down to the driver, even though we haven't told
 864     * the driver that we're the kind of loader that provides reliable
 865     * invalidate events.  This causes the driver to request buffers again at
 866     * its next draw, so that we get the correct buffers if a pageflip
 867     * happened.  The driver should still be using the viewport hack to catch
 868     * window resizes.
 869     */
 870    if (dri2_dpy->flush &&
 871        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 872       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 873
 874    return swap_count;
 875 }
 876
 877 static EGLBoolean
 878 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 879 {
 880    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 881    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 882
 883    if (dri2_dpy->dri2) {
 884       if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1) {
 885           return EGL_TRUE;
 886       }
 887       /* Swap failed with a window drawable. */
 888       _eglError(EGL_BAD_NATIVE_WINDOW, __FUNCTION__);
 889       return EGL_FALSE;
 890    } else {
 891       assert(dri2_dpy->swrast);
 892
 893       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 894       return EGL_TRUE;
 895    }
 896 }
 897
 898 static EGLBoolean
 899 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 900                              _EGLSurface *draw,
 901                              EGLint numRects, const EGLint *rects)
 902 {
 903    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 904    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 905    EGLBoolean ret;
 906    xcb_xfixes_region_t region;
 907    xcb_rectangle_t rectangles[16];
 908    int i;
 909
 910    if (numRects > (int)ARRAY_SIZE(rectangles))
 911       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 912
 913    for (i = 0; i < numRects; i++) {
 914       rectangles[i].x = rects[i * 4];
 915       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 916       rectangles[i].width = rects[i * 4 + 2];
 917       rectangles[i].height = rects[i * 4 + 3];
 918    }
 919
 920    region = xcb_generate_id(dri2_dpy->conn);
 921    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 922    ret = dri2_copy_region(drv, disp, draw, region);
 923    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 924
 925    return ret;
 926 }
 927
 928 static EGLBoolean
 929 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 930                      EGLint x, EGLint y, EGLint width, EGLint height)
 931 {
 932    const EGLint rect[4] = { x, y, width, height };
 933
 934    if (x < 0 || y < 0 || width < 0 || height < 0)
 935       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 936
 937    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 938 }
 939
 940 static EGLBoolean
 941 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 942                        EGLint interval)
 943 {
 944    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 945    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 946
 947    if (interval > surf->Config->MaxSwapInterval)
 948       interval = surf->Config->MaxSwapInterval;
 949    else if (interval < surf->Config->MinSwapInterval)
 950       interval = surf->Config->MinSwapInterval;
 951
 952    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 953       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 954
 955    surf->SwapInterval = interval;
 956
 957    return EGL_TRUE;
 958 }
 959
 960 static EGLBoolean
 961 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 962                       void *native_pixmap_target)
 963 {
 964    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 965    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 966    xcb_gcontext_t gc;
 967    xcb_pixmap_t target;
 968
 969    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 970    target = (uintptr_t) native_pixmap_target;
 971
 972    (void) drv;
 973
 974    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 975
 976    gc = xcb_generate_id(dri2_dpy->conn);
 977    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 978    xcb_copy_area(dri2_dpy->conn,
 979                   dri2_surf->drawable,
 980                   target,
 981                   gc,
 982                   0, 0,
 983                   0, 0,
 984                   dri2_surf->base.Width,
 985                   dri2_surf->base.Height);
 986    xcb_free_gc(dri2_dpy->conn, gc);
 987
 988    return EGL_TRUE;
 989 }
 990
 991 static _EGLImage *
 992 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 993                              EGLClientBuffer buffer, const EGLint *attr_list)
 994 {
 995    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 996    struct dri2_egl_image *dri2_img;
 997    unsigned int attachments[1];
 998    xcb_drawable_t drawable;
 999    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1000    xcb_dri2_get_buffers_reply_t *buffers_reply;
1001    xcb_dri2_dri2_buffer_t *buffers;
1002    xcb_get_geometry_cookie_t geometry_cookie;
1003    xcb_get_geometry_reply_t *geometry_reply;
1004    xcb_generic_error_t *error;
1005    int stride, format;
1006
1007    (void) ctx;
1008
1009    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1010    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1011    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1012    buffers_cookie =
1013       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1014                                       drawable, 1, 1, attachments);
1015    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1016    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1017                                                buffers_cookie, NULL);
1018    if (buffers_reply == NULL)
1019      return NULL;
1020
1021    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1022    if (buffers == NULL) {
1023       return NULL;
1024    }
1025
1026    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1027                                             geometry_cookie, &error);
1028    if (geometry_reply == NULL || error != NULL) {
1029       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1030       free(error);
1031       free(buffers_reply);
1032       return NULL;
1033    }
1034
1035    switch (geometry_reply->depth) {
1036    case 16:
1037       format = __DRI_IMAGE_FORMAT_RGB565;
1038       break;
1039    case 24:
1040       format = __DRI_IMAGE_FORMAT_XRGB8888;
1041       break;
1042    case 32:
1043       format = __DRI_IMAGE_FORMAT_ARGB8888;
1044       break;
1045    default:
1046       _eglError(EGL_BAD_PARAMETER,
1047                 "dri2_create_image_khr: unsupported pixmap depth");
1048       free(buffers_reply);
1049       free(geometry_reply);
1050       return NULL;
1051    }
1052
1053    dri2_img = malloc(sizeof *dri2_img);
1054    if (!dri2_img) {
1055       free(buffers_reply);
1056       free(geometry_reply);
1057       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1058       return EGL_NO_IMAGE_KHR;
1059    }
1060
1061    if (!_eglInitImage(&dri2_img->base, disp)) {
1062       free(buffers_reply);
1063       free(geometry_reply);
1064       free(dri2_img);
1065       return EGL_NO_IMAGE_KHR;
1066    }
1067
1068    stride = buffers[0].pitch / buffers[0].cpp;
1069    dri2_img->dri_image =
1070       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1071                                            buffers_reply->width,
1072                                            buffers_reply->height,
1073                                            format,
1074                                            buffers[0].name,
1075                                            stride,
1076                                            dri2_img);
1077
1078    free(buffers_reply);
1079    free(geometry_reply);
1080
1081    return &dri2_img->base;
1082 }
1083
1084 static _EGLImage *
1085 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1086                           _EGLContext *ctx, EGLenum target,
1087                           EGLClientBuffer buffer, const EGLint *attr_list)
1088 {
1089    (void) drv;
1090
1091    switch (target) {
1092    case EGL_NATIVE_PIXMAP_KHR:
1093       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1094    default:
1095       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1096    }
1097 }
1098
1099 static EGLBoolean
1100 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1101                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1102                          EGLuint64KHR *sbc)
1103 {
1104    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1105    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1106    xcb_dri2_get_msc_cookie_t cookie;
1107    xcb_dri2_get_msc_reply_t *reply;
1108
1109    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1110    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1111
1112    if (!reply) {
1113       _eglError(EGL_BAD_ACCESS, __func__);
1114       return EGL_FALSE;
1115    }
1116
1117    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1118    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1119    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1120    free(reply);
1121
1122    return EGL_TRUE;
1123 }
1124
1125 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1126    .authenticate = NULL,
1127    .create_window_surface = dri2_x11_create_window_surface,
1128    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1129    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1130    .destroy_surface = dri2_x11_destroy_surface,
1131    .create_image = dri2_fallback_create_image_khr,
1132    .swap_interval = dri2_fallback_swap_interval,
1133    .swap_buffers = dri2_x11_swap_buffers,
1134    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1135    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1136    .copy_buffers = dri2_x11_copy_buffers,
1137    .query_buffer_age = dri2_fallback_query_buffer_age,
1138    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1139    .get_sync_values = dri2_fallback_get_sync_values,
1140    .get_dri_drawable = dri2_surface_get_dri_drawable,
1141 };
1142
1143 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1144    .authenticate = dri2_x11_authenticate,
1145    .create_window_surface = dri2_x11_create_window_surface,
1146    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1147    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1148    .destroy_surface = dri2_x11_destroy_surface,
1149    .create_image = dri2_x11_create_image_khr,
1150    .swap_interval = dri2_x11_swap_interval,
1151    .swap_buffers = dri2_x11_swap_buffers,
1152    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1153    .swap_buffers_region = dri2_x11_swap_buffers_region,
1154    .post_sub_buffer = dri2_x11_post_sub_buffer,
1155    .copy_buffers = dri2_x11_copy_buffers,
1156    .query_buffer_age = dri2_fallback_query_buffer_age,
1157    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1158    .get_sync_values = dri2_x11_get_sync_values,
1159    .get_dri_drawable = dri2_surface_get_dri_drawable,
1160 };
1161
1162 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1163    .base = { __DRI_SWRAST_LOADER, 1 },
1164
1165    .getDrawableInfo = swrastGetDrawableInfo,
1166    .putImage        = swrastPutImage,
1167    .getImage        = swrastGetImage,
1168 };
1169
1170 static const __DRIextension *swrast_loader_extensions[] = {
1171    &swrast_loader_extension.base,
1172    NULL,
1173 };
1174
1175 static EGLBoolean
1176 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1177 {
1178    struct dri2_egl_display *dri2_dpy;
1179
1180    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1181    if (!dri2_dpy)
1182       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1183
1184    disp->DriverData = (void *) dri2_dpy;
1185    if (disp->PlatformDisplay == NULL) {
1186       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1187       dri2_dpy->own_device = true;
1188    } else {
1189       Display *dpy = disp->PlatformDisplay;
1190
1191       dri2_dpy->conn = XGetXCBConnection(dpy);
1192       dri2_dpy->screen = DefaultScreen(dpy);
1193    }
1194
1195    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1196       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1197       goto cleanup_dpy;
1198    }
1199
1200    /*
1201     * Every hardware driver_name is set using strdup. Doing the same in
1202     * here will allow is to simply free the memory at dri2_terminate().
1203     */
1204    dri2_dpy->fd = -1;
1205    dri2_dpy->driver_name = strdup("swrast");
1206    if (!dri2_load_driver_swrast(disp))
1207       goto cleanup_conn;
1208
1209    dri2_dpy->loader_extensions = swrast_loader_extensions;
1210
1211    if (!dri2_create_screen(disp))
1212       goto cleanup_driver;
1213
1214    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1215       goto cleanup_configs;
1216
1217    /* Fill vtbl last to prevent accidentally calling virtual function during
1218     * initialization.
1219     */
1220    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1221
1222    return EGL_TRUE;
1223
1224  cleanup_configs:
1225    _eglCleanupDisplay(disp);
1226    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1227  cleanup_driver:
1228    dlclose(dri2_dpy->driver);
1229  cleanup_conn:
1230    free(dri2_dpy->driver_name);
1231    if (disp->PlatformDisplay == NULL)
1232       xcb_disconnect(dri2_dpy->conn);
1233  cleanup_dpy:
1234    free(dri2_dpy);
1235    disp->DriverData = NULL;
1236
1237    return EGL_FALSE;
1238 }
1239
1240 static void
1241 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1242 {
1243    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1244    int arbitrary_max_interval = 1000;
1245
1246    /* default behavior for no SwapBuffers support: no vblank syncing
1247     * either.
1248     */
1249    dri2_dpy->min_swap_interval = 0;
1250    dri2_dpy->max_swap_interval = 0;
1251
1252    if (!dri2_dpy->swap_available)
1253       return;
1254
1255    /* If we do have swapbuffers, then we can support pretty much any swap
1256     * interval, but we allow driconf to override applications.
1257     */
1258    if (dri2_dpy->config)
1259       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1260                                      "vblank_mode", &vblank_mode);
1261    switch (vblank_mode) {
1262    case DRI_CONF_VBLANK_NEVER:
1263       dri2_dpy->min_swap_interval = 0;
1264       dri2_dpy->max_swap_interval = 0;
1265       dri2_dpy->default_swap_interval = 0;
1266       break;
1267    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1268       dri2_dpy->min_swap_interval = 1;
1269       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1270       dri2_dpy->default_swap_interval = 1;
1271       break;
1272    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1273       dri2_dpy->min_swap_interval = 0;
1274       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1275       dri2_dpy->default_swap_interval = 0;
1276       break;
1277    default:
1278    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1279       dri2_dpy->min_swap_interval = 0;
1280       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1281       dri2_dpy->default_swap_interval = 1;
1282       break;
1283    }
1284 }
1285
1286 #ifdef HAVE_DRI3
1287
1288 static const __DRIextension *dri3_image_loader_extensions[] = {
1289    &dri3_image_loader_extension.base,
1290    &image_lookup_extension.base,
1291    &use_invalidate.base,
1292    NULL,
1293 };
1294
1295 static EGLBoolean
1296 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1297 {
1298    struct dri2_egl_display *dri2_dpy;
1299
1300    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1301    if (!dri2_dpy)
1302       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1303
1304    disp->DriverData = (void *) dri2_dpy;
1305    if (disp->PlatformDisplay == NULL) {
1306       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1307       dri2_dpy->own_device = true;
1308    } else {
1309       Display *dpy = disp->PlatformDisplay;
1310
1311       dri2_dpy->conn = XGetXCBConnection(dpy);
1312       dri2_dpy->screen = DefaultScreen(dpy);
1313    }
1314
1315    if (xcb_connection_has_error(dri2_dpy->conn)) {
1316       _eglLog(_EGL_WARNING, "DRI3: xcb_connect failed");
1317       goto cleanup_dpy;
1318    }
1319
1320    if (dri2_dpy->conn) {
1321       if (!dri3_x11_connect(dri2_dpy))
1322          goto cleanup_conn;
1323    }
1324
1325    if (!dri2_load_driver_dri3(disp))
1326       goto cleanup_conn;
1327
1328    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1329
1330    dri2_dpy->swap_available = true;
1331    dri2_dpy->invalidate_available = true;
1332
1333    if (!dri2_create_screen(disp))
1334       goto cleanup_fd;
1335
1336    dri2_x11_setup_swap_interval(dri2_dpy);
1337
1338    if (!dri2_dpy->is_different_gpu)
1339       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1340    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1341    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1342    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1343
1344 #ifdef HAVE_WAYLAND_PLATFORM
1345    if (dri2_dpy->device_name)
1346       disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1347 #endif
1348
1349    if (dri2_dpy->conn) {
1350       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1351          goto cleanup_configs;
1352    }
1353
1354    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1355    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1356    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1357    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1358    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1359    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1360
1361    /* Fill vtbl last to prevent accidentally calling virtual function during
1362     * initialization.
1363     */
1364    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1365
1366    _eglLog(_EGL_INFO, "Using DRI3");
1367
1368    return EGL_TRUE;
1369
1370  cleanup_configs:
1371    _eglCleanupDisplay(disp);
1372    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1373    dlclose(dri2_dpy->driver);
1374  cleanup_fd:
1375    close(dri2_dpy->fd);
1376  cleanup_conn:
1377    if (disp->PlatformDisplay == NULL)
1378       xcb_disconnect(dri2_dpy->conn);
1379  cleanup_dpy:
1380    free(dri2_dpy);
1381    disp->DriverData = NULL;
1382
1383    return EGL_FALSE;
1384 }
1385 #endif
1386
1387 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1388    .base = { __DRI_DRI2_LOADER, 2 },
1389
1390    .getBuffers           = dri2_x11_get_buffers,
1391    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1392    .getBuffersWithFormat = NULL,
1393 };
1394
1395 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1396    .base = { __DRI_DRI2_LOADER, 3 },
1397
1398    .getBuffers           = dri2_x11_get_buffers,
1399    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1400    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1401 };
1402
1403 static const __DRIextension *dri2_loader_extensions_old[] = {
1404    &dri2_loader_extension_old.base,
1405    &image_lookup_extension.base,
1406    NULL,
1407 };
1408
1409 static const __DRIextension *dri2_loader_extensions[] = {
1410    &dri2_loader_extension.base,
1411    &image_lookup_extension.base,
1412    NULL,
1413 };
1414
1415 static EGLBoolean
1416 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1417 {
1418    struct dri2_egl_display *dri2_dpy;
1419
1420    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1421    if (!dri2_dpy)
1422       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1423
1424    disp->DriverData = (void *) dri2_dpy;
1425    if (disp->PlatformDisplay == NULL) {
1426       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1427       dri2_dpy->own_device = true;
1428    } else {
1429       Display *dpy = disp->PlatformDisplay;
1430
1431       dri2_dpy->conn = XGetXCBConnection(dpy);
1432       dri2_dpy->screen = DefaultScreen(dpy);
1433    }
1434
1435    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1436       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1437       goto cleanup_dpy;
1438    }
1439
1440    if (!dri2_x11_connect(dri2_dpy))
1441       goto cleanup_conn;
1442
1443    if (!dri2_load_driver(disp))
1444       goto cleanup_fd;
1445
1446    if (dri2_dpy->dri2_minor >= 1)
1447       dri2_dpy->loader_extensions = dri2_loader_extensions;
1448    else
1449       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1450
1451    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1452    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1453
1454    if (!dri2_create_screen(disp))
1455       goto cleanup_driver;
1456
1457    dri2_x11_setup_swap_interval(dri2_dpy);
1458
1459    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1460    disp->Extensions.NOK_swap_region = EGL_TRUE;
1461    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1462    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1463    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1464
1465 #ifdef HAVE_WAYLAND_PLATFORM
1466    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1467 #endif
1468
1469    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1470       goto cleanup_configs;
1471
1472    /* Fill vtbl last to prevent accidentally calling virtual function during
1473     * initialization.
1474     */
1475    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1476
1477    _eglLog(_EGL_INFO, "Using DRI2");
1478
1479    return EGL_TRUE;
1480
1481  cleanup_configs:
1482    _eglCleanupDisplay(disp);
1483    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1484  cleanup_driver:
1485    dlclose(dri2_dpy->driver);
1486  cleanup_fd:
1487    close(dri2_dpy->fd);
1488  cleanup_conn:
1489    if (disp->PlatformDisplay == NULL)
1490       xcb_disconnect(dri2_dpy->conn);
1491  cleanup_dpy:
1492    free(dri2_dpy);
1493    disp->DriverData = NULL;
1494
1495    return EGL_FALSE;
1496 }
1497
1498 EGLBoolean
1499 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1500 {
1501    EGLBoolean initialized = EGL_TRUE;
1502
1503    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1504
1505    if (x11_dri2_accel) {
1506 #ifdef HAVE_DRI3
1507       if (getenv("LIBGL_DRI3_DISABLE") != NULL ||
1508           !dri2_initialize_x11_dri3(drv, disp)) {
1509 #endif
1510          if (!dri2_initialize_x11_dri2(drv, disp)) {
1511             initialized = dri2_initialize_x11_swrast(drv, disp);
1512          }
1513 #ifdef HAVE_DRI3
1514       }
1515 #endif
1516    } else {
1517       initialized = dri2_initialize_x11_swrast(drv, disp);
1518    }
1519
1520    return initialized;
1521 }
1522