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/debug.h"
  44 #include "util/macros.h"
  45
  46 #include "egl_dri2.h"
  47 #include "egl_dri2_fallbacks.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 static void
  59 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  60                      struct dri2_egl_surface * dri2_surf)
  61 {
  62    uint32_t           mask;
  63    const uint32_t     function = GXcopy;
  64    uint32_t           valgc[2];
  65
  66    /* create GC's */
  67    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  68    mask = XCB_GC_FUNCTION;
  69    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  70
  71    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  72    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  73    valgc[0] = function;
  74    valgc[1] = False;
  75    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  76    switch (dri2_surf->depth) {
  77       case 32:
  78       case 24:
  79          dri2_surf->bytes_per_pixel = 4;
  80          break;
  81       case 16:
  82          dri2_surf->bytes_per_pixel = 2;
  83          break;
  84       case 8:
  85          dri2_surf->bytes_per_pixel = 1;
  86          break;
  87       case 0:
  88          dri2_surf->bytes_per_pixel = 0;
  89          break;
  90       default:
  91          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  92    }
  93 }
  94
  95 static void
  96 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  97                       struct dri2_egl_surface * dri2_surf)
  98 {
  99    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 100    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 101 }
 102
 103 static bool
 104 x11_get_drawable_info(__DRIdrawable * draw,
 105                       int *x, int *y, int *w, int *h,
 106                       void *loaderPrivate)
 107 {
 108    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 109    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 110
 111    xcb_get_geometry_cookie_t cookie;
 112    xcb_get_geometry_reply_t *reply;
 113    xcb_generic_error_t *error;
 114    bool ret;
 115
 116    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 117    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 118    if (reply == NULL)
 119       return false;
 120
 121    if (error != NULL) {
 122       ret = false;
 123       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 124       free(error);
 125    } else {
 126       *x = reply->x;
 127       *y = reply->y;
 128       *w = reply->width;
 129       *h = reply->height;
 130       ret = true;
 131    }
 132    free(reply);
 133    return ret;
 134 }
 135
 136 static void
 137 swrastGetDrawableInfo(__DRIdrawable * draw,
 138                       int *x, int *y, int *w, int *h,
 139                       void *loaderPrivate)
 140 {
 141    *x = *y = *w = *h = 0;
 142    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 143 }
 144
 145 static void
 146 swrastPutImage(__DRIdrawable * draw, int op,
 147                int x, int y, int w, int h,
 148                char *data, void *loaderPrivate)
 149 {
 150    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 151    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 152
 153    xcb_gcontext_t gc;
 154
 155    switch (op) {
 156    case __DRI_SWRAST_IMAGE_OP_DRAW:
 157       gc = dri2_surf->gc;
 158       break;
 159    case __DRI_SWRAST_IMAGE_OP_SWAP:
 160       gc = dri2_surf->swapgc;
 161       break;
 162    default:
 163       return;
 164    }
 165
 166    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 167                  gc, w, h, x, y, 0, dri2_surf->depth,
 168                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 169 }
 170
 171 static void
 172 swrastGetImage(__DRIdrawable * read,
 173                int x, int y, int w, int h,
 174                char *data, void *loaderPrivate)
 175 {
 176    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 177    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 178
 179    xcb_get_image_cookie_t cookie;
 180    xcb_get_image_reply_t *reply;
 181    xcb_generic_error_t *error;
 182
 183    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 184                            dri2_surf->drawable, x, y, w, h, ~0);
 185    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 186    if (reply == NULL)
 187       return;
 188
 189    if (error != NULL) {
 190       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 191       free(error);
 192    } else {
 193       uint32_t bytes = xcb_get_image_data_length(reply);
 194       uint8_t *idata = xcb_get_image_data(reply);
 195       memcpy(data, idata, bytes);
 196    }
 197    free(reply);
 198 }
 199
 200
 201 static xcb_screen_t *
 202 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 203 {
 204     for (; iter.rem; --screen, xcb_screen_next(&iter))
 205         if (screen == 0)
 206             return iter.data;
 207
 208     return NULL;
 209 }
 210
 211
 212 /**
 213  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 214  */
 215 static _EGLSurface *
 216 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 217                         _EGLConfig *conf, void *native_surface,
 218                         const EGLint *attrib_list)
 219 {
 220    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 221    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 222    struct dri2_egl_surface *dri2_surf;
 223    xcb_get_geometry_cookie_t cookie;
 224    xcb_get_geometry_reply_t *reply;
 225    xcb_generic_error_t *error;
 226    const __DRIconfig *config;
 227
 228    (void) drv;
 229
 230    dri2_surf = malloc(sizeof *dri2_surf);
 231    if (!dri2_surf) {
 232       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 233       return NULL;
 234    }
 235
 236    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 237       goto cleanup_surf;
 238
 239    dri2_surf->region = XCB_NONE;
 240    if (type == EGL_PBUFFER_BIT) {
 241       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 242       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 243                        dri2_surf->drawable, dri2_dpy->screen->root,
 244                         dri2_surf->base.Width, dri2_surf->base.Height);
 245    } else {
 246       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 247       dri2_surf->drawable = (uintptr_t) native_surface;
 248    }
 249
 250    config = dri2_get_dri_config(dri2_conf, type,
 251                                 dri2_surf->base.GLColorspace);
 252
 253    if (dri2_dpy->dri2) {
 254       dri2_surf->dri_drawable =
 255          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 256                                            dri2_surf);
 257    } else {
 258       assert(dri2_dpy->swrast);
 259       dri2_surf->dri_drawable =
 260          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 261                                              dri2_surf);
 262    }
 263
 264    if (dri2_surf->dri_drawable == NULL) {
 265       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 266       goto cleanup_pixmap;
 267    }
 268
 269    if (type != EGL_PBUFFER_BIT) {
 270       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 271       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 272       if (error != NULL) {
 273          if (error->error_code == BadAlloc)
 274             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 275          else if (type == EGL_WINDOW_BIT)
 276             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 277          else
 278             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 279          free(error);
 280          goto cleanup_dri_drawable;
 281       } else if (reply == NULL) {
 282          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 283          goto cleanup_dri_drawable;
 284       }
 285
 286       dri2_surf->base.Width = reply->width;
 287       dri2_surf->base.Height = reply->height;
 288       dri2_surf->depth = reply->depth;
 289       free(reply);
 290    }
 291
 292    if (dri2_dpy->dri2) {
 293       xcb_void_cookie_t cookie;
 294       int conn_error;
 295
 296       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 297                                                 dri2_surf->drawable);
 298       error = xcb_request_check(dri2_dpy->conn, cookie);
 299       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 300       if (conn_error || error != NULL) {
 301          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 302             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 303          else if (type == EGL_WINDOW_BIT)
 304             _eglError(EGL_BAD_NATIVE_WINDOW,
 305                       "xcb_dri2_create_drawable_checked");
 306          else
 307             _eglError(EGL_BAD_NATIVE_PIXMAP,
 308                       "xcb_dri2_create_drawable_checked");
 309          free(error);
 310          goto cleanup_dri_drawable;
 311       }
 312    } else {
 313       if (type == EGL_PBUFFER_BIT) {
 314          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 315       }
 316       swrastCreateDrawable(dri2_dpy, dri2_surf);
 317    }
 318
 319    /* we always copy the back buffer to front */
 320    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 321
 322    return &dri2_surf->base;
 323
 324  cleanup_dri_drawable:
 325    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 326  cleanup_pixmap:
 327    if (type == EGL_PBUFFER_BIT)
 328       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 329  cleanup_surf:
 330    free(dri2_surf);
 331
 332    return NULL;
 333 }
 334
 335 /**
 336  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 337  */
 338 static _EGLSurface *
 339 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 340                                _EGLConfig *conf, void *native_window,
 341                                const EGLint *attrib_list)
 342 {
 343    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 344    _EGLSurface *surf;
 345
 346    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 347                                   native_window, attrib_list);
 348    if (surf != NULL) {
 349       /* When we first create the DRI2 drawable, its swap interval on the
 350        * server side is 1.
 351        */
 352       surf->SwapInterval = 1;
 353
 354       /* Override that with a driconf-set value. */
 355       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 356    }
 357
 358    return surf;
 359 }
 360
 361 static _EGLSurface *
 362 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 363                                _EGLConfig *conf, void *native_pixmap,
 364                                const EGLint *attrib_list)
 365 {
 366    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 367                                   native_pixmap, attrib_list);
 368 }
 369
 370 static _EGLSurface *
 371 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 372                                 _EGLConfig *conf, const EGLint *attrib_list)
 373 {
 374    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 375                                   NULL, attrib_list);
 376 }
 377
 378 static EGLBoolean
 379 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 380 {
 381    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 382    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 383
 384    (void) drv;
 385
 386    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 387
 388    if (dri2_dpy->dri2) {
 389       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 390    } else {
 391       assert(dri2_dpy->swrast);
 392       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 393    }
 394
 395    if (surf->Type == EGL_PBUFFER_BIT)
 396       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 397
 398    free(surf);
 399
 400    return EGL_TRUE;
 401 }
 402
 403 /**
 404  * Function utilizes swrastGetDrawableInfo to get surface
 405  * geometry from x server and calls default query surface
 406  * implementation that returns the updated values.
 407  *
 408  * In case of errors we still return values that we currently
 409  * have.
 410  */
 411 static EGLBoolean
 412 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 413                    _EGLSurface *surf, EGLint attribute,
 414                    EGLint *value)
 415 {
 416    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 417    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 418    int x, y, w, h;
 419
 420    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 421
 422    switch (attribute) {
 423    case EGL_WIDTH:
 424    case EGL_HEIGHT:
 425       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 426          surf->Width = w;
 427          surf->Height = h;
 428       }
 429       break;
 430    default:
 431       break;
 432    }
 433    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 434 }
 435
 436 /**
 437  * Process list of buffer received from the server
 438  *
 439  * Processes the list of buffers received in a reply from the server to either
 440  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 441  */
 442 static void
 443 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 444                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 445 {
 446    struct dri2_egl_display *dri2_dpy =
 447       dri2_egl_display(dri2_surf->base.Resource.Display);
 448    xcb_rectangle_t rectangle;
 449
 450    dri2_surf->have_fake_front = false;
 451
 452    /* This assumes the DRI2 buffer attachment tokens matches the
 453     * __DRIbuffer tokens. */
 454    for (unsigned i = 0; i < count; i++) {
 455       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 456       dri2_surf->buffers[i].name = buffers[i].name;
 457       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 458       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 459       dri2_surf->buffers[i].flags = buffers[i].flags;
 460
 461       /* We only use the DRI drivers single buffer configs.  This
 462        * means that if we try to render to a window, DRI2 will give us
 463        * the fake front buffer, which we'll use as a back buffer.
 464        * Note that EGL doesn't require that several clients rendering
 465        * to the same window must see the same aux buffers. */
 466       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 467          dri2_surf->have_fake_front = true;
 468    }
 469
 470    if (dri2_surf->region != XCB_NONE)
 471       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 472
 473    rectangle.x = 0;
 474    rectangle.y = 0;
 475    rectangle.width = dri2_surf->base.Width;
 476    rectangle.height = dri2_surf->base.Height;
 477    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 478    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 479 }
 480
 481 static __DRIbuffer *
 482 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 483                      int *width, int *height,
 484                      unsigned int *attachments, int count,
 485                      int *out_count, void *loaderPrivate)
 486 {
 487    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 488    struct dri2_egl_display *dri2_dpy =
 489       dri2_egl_display(dri2_surf->base.Resource.Display);
 490    xcb_dri2_dri2_buffer_t *buffers;
 491    xcb_dri2_get_buffers_reply_t *reply;
 492    xcb_dri2_get_buffers_cookie_t cookie;
 493
 494    (void) driDrawable;
 495
 496    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 497                                             dri2_surf->drawable,
 498                                             count, count, attachments);
 499    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 500    if (reply == NULL)
 501       return NULL;
 502    buffers = xcb_dri2_get_buffers_buffers (reply);
 503    if (buffers == NULL)
 504       return NULL;
 505
 506    *out_count = reply->count;
 507    dri2_surf->base.Width = *width = reply->width;
 508    dri2_surf->base.Height = *height = reply->height;
 509    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 510
 511    free(reply);
 512
 513    return dri2_surf->buffers;
 514 }
 515
 516 static __DRIbuffer *
 517 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 518                                  int *width, int *height,
 519                                  unsigned int *attachments, int count,
 520                                  int *out_count, void *loaderPrivate)
 521 {
 522    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 523    struct dri2_egl_display *dri2_dpy =
 524       dri2_egl_display(dri2_surf->base.Resource.Display);
 525    xcb_dri2_dri2_buffer_t *buffers;
 526    xcb_dri2_get_buffers_with_format_reply_t *reply;
 527    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 528    xcb_dri2_attach_format_t *format_attachments;
 529
 530    (void) driDrawable;
 531
 532    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 533    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 534                                                         dri2_surf->drawable,
 535                                                         count, count,
 536                                                         format_attachments);
 537
 538    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 539                                                    cookie, NULL);
 540    if (reply == NULL)
 541       return NULL;
 542
 543    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 544    dri2_surf->base.Width = *width = reply->width;
 545    dri2_surf->base.Height = *height = reply->height;
 546    *out_count = reply->count;
 547    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 548
 549    free(reply);
 550
 551    return dri2_surf->buffers;
 552 }
 553
 554 static void
 555 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 556 {
 557    (void) driDrawable;
 558
 559    /* FIXME: Does EGL support front buffer rendering at all? */
 560
 561 #if 0
 562    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 563
 564    dri2WaitGL(dri2_surf);
 565 #else
 566    (void) loaderPrivate;
 567 #endif
 568 }
 569
 570 static int
 571 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 572 {
 573    xcb_dri2_authenticate_reply_t *authenticate;
 574    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 575    int ret = 0;
 576
 577    authenticate_cookie =
 578       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 579    authenticate =
 580       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 581
 582    if (authenticate == NULL || !authenticate->authenticated)
 583       ret = -1;
 584
 585    free(authenticate);
 586
 587    return ret;
 588 }
 589
 590 static EGLBoolean
 591 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 592 {
 593 #ifdef HAVE_LIBDRM
 594    drm_magic_t magic;
 595
 596    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 597       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 598       return EGL_FALSE;
 599    }
 600
 601    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 602       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 603       return EGL_FALSE;
 604    }
 605 #endif
 606    return EGL_TRUE;
 607 }
 608
 609 static EGLBoolean
 610 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 611 {
 612    xcb_xfixes_query_version_reply_t *xfixes_query;
 613    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 614    xcb_dri2_query_version_reply_t *dri2_query;
 615    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 616    xcb_dri2_connect_reply_t *connect;
 617    xcb_dri2_connect_cookie_t connect_cookie;
 618    xcb_generic_error_t *error;
 619    char *driver_name, *loader_driver_name, *device_name;
 620    const xcb_query_extension_reply_t *extension;
 621
 622    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 623    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 624
 625    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 626    if (!(extension && extension->present))
 627       return EGL_FALSE;
 628
 629    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 630    if (!(extension && extension->present))
 631       return EGL_FALSE;
 632
 633    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 634                                                   XCB_XFIXES_MAJOR_VERSION,
 635                                                   XCB_XFIXES_MINOR_VERSION);
 636
 637    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 638                                                XCB_DRI2_MAJOR_VERSION,
 639                                                XCB_DRI2_MINOR_VERSION);
 640
 641    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 642                                    XCB_DRI2_DRIVER_TYPE_DRI);
 643
 644    xfixes_query =
 645       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 646                                       xfixes_query_cookie, &error);
 647    if (xfixes_query == NULL ||
 648        error != NULL || xfixes_query->major_version < 2) {
 649       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 650       free(error);
 651       free(xfixes_query);
 652       return EGL_FALSE;
 653    }
 654    free(xfixes_query);
 655
 656    dri2_query =
 657       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 658    if (dri2_query == NULL || error != NULL) {
 659       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 660       free(error);
 661       return EGL_FALSE;
 662    }
 663    dri2_dpy->dri2_major = dri2_query->major_version;
 664    dri2_dpy->dri2_minor = dri2_query->minor_version;
 665    free(dri2_query);
 666
 667    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 668    if (connect == NULL ||
 669        connect->driver_name_length + connect->device_name_length == 0) {
 670       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 671       return EGL_FALSE;
 672    }
 673
 674    device_name = xcb_dri2_connect_device_name (connect);
 675
 676    dri2_dpy->fd = loader_open_device(device_name);
 677    if (dri2_dpy->fd == -1) {
 678       _eglLog(_EGL_WARNING,
 679               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 680       free(connect);
 681       return EGL_FALSE;
 682    }
 683
 684    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 685       close(dri2_dpy->fd);
 686       free(connect);
 687       return EGL_FALSE;
 688    }
 689
 690    driver_name = xcb_dri2_connect_driver_name (connect);
 691
 692    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 693     * Otherwise, default to the server's value.
 694     */
 695    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 696    if (loader_driver_name) {
 697       dri2_dpy->driver_name = loader_driver_name;
 698    } else {
 699       dri2_dpy->driver_name =
 700          strndup(driver_name,
 701                  xcb_dri2_connect_driver_name_length(connect));
 702    }
 703
 704    if (dri2_dpy->driver_name == NULL) {
 705       close(dri2_dpy->fd);
 706       free(dri2_dpy->driver_name);
 707       free(connect);
 708       return EGL_FALSE;
 709    }
 710
 711 #ifdef HAVE_WAYLAND_PLATFORM
 712    dri2_dpy->device_name =
 713       strndup(device_name,
 714               xcb_dri2_connect_device_name_length(connect));
 715 #endif
 716
 717    free(connect);
 718
 719    return EGL_TRUE;
 720 }
 721
 722 static int
 723 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 724 {
 725    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 726
 727    return dri2_x11_do_authenticate(dri2_dpy, id);
 728 }
 729
 730 static EGLBoolean
 731 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 732                                  _EGLDisplay *disp, bool supports_preserved)
 733 {
 734    xcb_depth_iterator_t d;
 735    xcb_visualtype_t *visuals;
 736    int config_count = 0;
 737    EGLint surface_type;
 738
 739    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 740
 741    surface_type =
 742       EGL_WINDOW_BIT |
 743       EGL_PIXMAP_BIT |
 744       EGL_PBUFFER_BIT;
 745
 746    if (supports_preserved)
 747       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 748
 749    while (d.rem > 0) {
 750       EGLBoolean class_added[6] = { 0, };
 751
 752       visuals = xcb_depth_visuals(d.data);
 753
 754       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 755          if (class_added[visuals[i]._class])
 756             continue;
 757
 758          class_added[visuals[i]._class] = EGL_TRUE;
 759
 760          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 761             struct dri2_egl_config *dri2_conf;
 762             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 763
 764             const EGLint config_attrs[] = {
 765                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 766                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 767                     EGL_NONE
 768             };
 769
 770             unsigned int rgba_masks[4] = {
 771                visuals[i].red_mask,
 772                visuals[i].green_mask,
 773                visuals[i].blue_mask,
 774                0,
 775             };
 776
 777             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 778                                         surface_type, config_attrs,
 779                                         rgba_masks);
 780             if (dri2_conf)
 781                if (dri2_conf->base.ConfigID == config_count + 1)
 782                   config_count++;
 783
 784             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 785              * Otherwise it will only match a 32-bit RGBA visual.  On a
 786              * composited window manager on X11, this will make all of the
 787              * EGLConfigs with destination alpha get blended by the
 788              * compositor.  This is probably not what the application
 789              * wants... especially on drivers that only have 32-bit RGBA
 790              * EGLConfigs! */
 791             if (d.data->depth == 24) {
 792                rgba_masks[3] =
 793                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 794                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 795                                            surface_type, config_attrs,
 796                                            rgba_masks);
 797                if (dri2_conf)
 798                   if (dri2_conf->base.ConfigID == config_count + 1)
 799                      config_count++;
 800             }
 801          }
 802       }
 803
 804       xcb_depth_next(&d);
 805    }
 806
 807    if (!config_count) {
 808       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 809       return EGL_FALSE;
 810    }
 811
 812    return EGL_TRUE;
 813 }
 814
 815 static EGLBoolean
 816 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 817                  _EGLSurface *draw, xcb_xfixes_region_t region)
 818 {
 819    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 820    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 821    enum xcb_dri2_attachment_t render_attachment;
 822    xcb_dri2_copy_region_cookie_t cookie;
 823
 824    /* No-op for a pixmap or pbuffer surface */
 825    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 826       return EGL_TRUE;
 827
 828    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 829
 830    if (dri2_surf->have_fake_front)
 831       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 832    else
 833       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 834
 835    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 836                                            dri2_surf->drawable,
 837                                            region,
 838                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 839                                            render_attachment);
 840    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 841
 842    return EGL_TRUE;
 843 }
 844
 845 static int64_t
 846 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 847                           int64_t msc, int64_t divisor, int64_t remainder)
 848 {
 849    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 850    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 851    uint32_t msc_hi = msc >> 32;
 852    uint32_t msc_lo = msc & 0xffffffff;
 853    uint32_t divisor_hi = divisor >> 32;
 854    uint32_t divisor_lo = divisor & 0xffffffff;
 855    uint32_t remainder_hi = remainder >> 32;
 856    uint32_t remainder_lo = remainder & 0xffffffff;
 857    xcb_dri2_swap_buffers_cookie_t cookie;
 858    xcb_dri2_swap_buffers_reply_t *reply;
 859    int64_t swap_count = -1;
 860
 861    /* No-op for a pixmap or pbuffer surface */
 862    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 863       return 0;
 864
 865    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 866       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 867
 868    dri2_flush_drawable_for_swapbuffers(disp, draw);
 869
 870    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 871                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 872
 873    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 874
 875    if (reply) {
 876       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 877       free(reply);
 878    }
 879
 880    /* Since we aren't watching for the server's invalidate events like we're
 881     * supposed to (due to XCB providing no mechanism for filtering the events
 882     * the way xlib does), and SwapBuffers is a common cause of invalidate
 883     * events, just shove one down to the driver, even though we haven't told
 884     * the driver that we're the kind of loader that provides reliable
 885     * invalidate events.  This causes the driver to request buffers again at
 886     * its next draw, so that we get the correct buffers if a pageflip
 887     * happened.  The driver should still be using the viewport hack to catch
 888     * window resizes.
 889     */
 890    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 891       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 892
 893    return swap_count;
 894 }
 895
 896 static EGLBoolean
 897 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 898 {
 899    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 900    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 901
 902    if (!dri2_dpy->flush) {
 903       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 904       return EGL_TRUE;
 905    }
 906
 907    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 908       /* Swap failed with a window drawable. */
 909       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 910    }
 911    return EGL_TRUE;
 912 }
 913
 914 static EGLBoolean
 915 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 916                              _EGLSurface *draw,
 917                              EGLint numRects, const EGLint *rects)
 918 {
 919    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 920    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 921    EGLBoolean ret;
 922    xcb_xfixes_region_t region;
 923    xcb_rectangle_t rectangles[16];
 924
 925    if (numRects > (int)ARRAY_SIZE(rectangles))
 926       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 927
 928    for (int i = 0; i < numRects; i++) {
 929       rectangles[i].x = rects[i * 4];
 930       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 931       rectangles[i].width = rects[i * 4 + 2];
 932       rectangles[i].height = rects[i * 4 + 3];
 933    }
 934
 935    region = xcb_generate_id(dri2_dpy->conn);
 936    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 937    ret = dri2_copy_region(drv, disp, draw, region);
 938    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 939
 940    return ret;
 941 }
 942
 943 static EGLBoolean
 944 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 945                      EGLint x, EGLint y, EGLint width, EGLint height)
 946 {
 947    const EGLint rect[4] = { x, y, width, height };
 948
 949    if (x < 0 || y < 0 || width < 0 || height < 0)
 950       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 951
 952    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 953 }
 954
 955 static EGLBoolean
 956 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 957                        EGLint interval)
 958 {
 959    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 960    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 961
 962    if (dri2_dpy->swap_available)
 963       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 964
 965    return EGL_TRUE;
 966 }
 967
 968 static EGLBoolean
 969 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 970                       void *native_pixmap_target)
 971 {
 972    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 973    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 974    xcb_gcontext_t gc;
 975    xcb_pixmap_t target;
 976
 977    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 978    target = (uintptr_t) native_pixmap_target;
 979
 980    (void) drv;
 981
 982    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 983
 984    gc = xcb_generate_id(dri2_dpy->conn);
 985    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 986    xcb_copy_area(dri2_dpy->conn,
 987                   dri2_surf->drawable,
 988                   target,
 989                   gc,
 990                   0, 0,
 991                   0, 0,
 992                   dri2_surf->base.Width,
 993                   dri2_surf->base.Height);
 994    xcb_free_gc(dri2_dpy->conn, gc);
 995
 996    return EGL_TRUE;
 997 }
 998
 999 static _EGLImage *
1000 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1001                              EGLClientBuffer buffer, const EGLint *attr_list)
1002 {
1003    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1004    struct dri2_egl_image *dri2_img;
1005    unsigned int attachments[1];
1006    xcb_drawable_t drawable;
1007    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1008    xcb_dri2_get_buffers_reply_t *buffers_reply;
1009    xcb_dri2_dri2_buffer_t *buffers;
1010    xcb_get_geometry_cookie_t geometry_cookie;
1011    xcb_get_geometry_reply_t *geometry_reply;
1012    xcb_generic_error_t *error;
1013    int stride, format;
1014
1015    (void) ctx;
1016
1017    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1018    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1019    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1020    buffers_cookie =
1021       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1022                                       drawable, 1, 1, attachments);
1023    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1024    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1025                                                buffers_cookie, NULL);
1026    if (buffers_reply == NULL)
1027      return NULL;
1028
1029    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1030    if (buffers == NULL) {
1031       return NULL;
1032    }
1033
1034    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1035                                             geometry_cookie, &error);
1036    if (geometry_reply == NULL || error != NULL) {
1037       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1038       free(error);
1039       free(buffers_reply);
1040       return NULL;
1041    }
1042
1043    switch (geometry_reply->depth) {
1044    case 16:
1045       format = __DRI_IMAGE_FORMAT_RGB565;
1046       break;
1047    case 24:
1048       format = __DRI_IMAGE_FORMAT_XRGB8888;
1049       break;
1050    case 32:
1051       format = __DRI_IMAGE_FORMAT_ARGB8888;
1052       break;
1053    default:
1054       _eglError(EGL_BAD_PARAMETER,
1055                 "dri2_create_image_khr: unsupported pixmap depth");
1056       free(buffers_reply);
1057       free(geometry_reply);
1058       return NULL;
1059    }
1060
1061    dri2_img = malloc(sizeof *dri2_img);
1062    if (!dri2_img) {
1063       free(buffers_reply);
1064       free(geometry_reply);
1065       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1066       return EGL_NO_IMAGE_KHR;
1067    }
1068
1069    _eglInitImage(&dri2_img->base, disp);
1070
1071    stride = buffers[0].pitch / buffers[0].cpp;
1072    dri2_img->dri_image =
1073       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1074                                            buffers_reply->width,
1075                                            buffers_reply->height,
1076                                            format,
1077                                            buffers[0].name,
1078                                            stride,
1079                                            dri2_img);
1080
1081    free(buffers_reply);
1082    free(geometry_reply);
1083
1084    return &dri2_img->base;
1085 }
1086
1087 static _EGLImage *
1088 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1089                           _EGLContext *ctx, EGLenum target,
1090                           EGLClientBuffer buffer, const EGLint *attr_list)
1091 {
1092    (void) drv;
1093
1094    switch (target) {
1095    case EGL_NATIVE_PIXMAP_KHR:
1096       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1097    default:
1098       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1099    }
1100 }
1101
1102 static EGLBoolean
1103 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1104                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1105                          EGLuint64KHR *sbc)
1106 {
1107    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1108    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1109    xcb_dri2_get_msc_cookie_t cookie;
1110    xcb_dri2_get_msc_reply_t *reply;
1111
1112    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1113    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1114
1115    if (!reply)
1116       return _eglError(EGL_BAD_ACCESS, __func__);
1117
1118    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1119    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1120    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1121    free(reply);
1122
1123    return EGL_TRUE;
1124 }
1125
1126 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1127    .authenticate = NULL,
1128    .create_window_surface = dri2_x11_create_window_surface,
1129    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1130    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1131    .destroy_surface = dri2_x11_destroy_surface,
1132    .create_image = dri2_create_image_khr,
1133    .swap_interval = dri2_fallback_swap_interval,
1134    .swap_buffers = dri2_x11_swap_buffers,
1135    .set_damage_region = dri2_fallback_set_damage_region,
1136    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1137    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1138    .copy_buffers = dri2_x11_copy_buffers,
1139    .query_buffer_age = dri2_fallback_query_buffer_age,
1140    .query_surface = dri2_query_surface,
1141    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1142    .get_sync_values = dri2_fallback_get_sync_values,
1143    .get_dri_drawable = dri2_surface_get_dri_drawable,
1144 };
1145
1146 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1147    .authenticate = dri2_x11_authenticate,
1148    .create_window_surface = dri2_x11_create_window_surface,
1149    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1150    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1151    .destroy_surface = dri2_x11_destroy_surface,
1152    .create_image = dri2_x11_create_image_khr,
1153    .swap_interval = dri2_x11_swap_interval,
1154    .swap_buffers = dri2_x11_swap_buffers,
1155    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1156    .swap_buffers_region = dri2_x11_swap_buffers_region,
1157    .set_damage_region = dri2_fallback_set_damage_region,
1158    .post_sub_buffer = dri2_x11_post_sub_buffer,
1159    .copy_buffers = dri2_x11_copy_buffers,
1160    .query_buffer_age = dri2_fallback_query_buffer_age,
1161    .query_surface = dri2_query_surface,
1162    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1163    .get_sync_values = dri2_x11_get_sync_values,
1164    .get_dri_drawable = dri2_surface_get_dri_drawable,
1165 };
1166
1167 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1168    .base = { __DRI_SWRAST_LOADER, 1 },
1169
1170    .getDrawableInfo = swrastGetDrawableInfo,
1171    .putImage        = swrastPutImage,
1172    .getImage        = swrastGetImage,
1173 };
1174
1175 static const __DRIextension *swrast_loader_extensions[] = {
1176    &swrast_loader_extension.base,
1177    &image_lookup_extension.base,
1178    NULL,
1179 };
1180
1181 static EGLBoolean
1182 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1183                         struct dri2_egl_display *dri2_dpy)
1184 {
1185    xcb_screen_iterator_t s;
1186    int screen = (uintptr_t)disp->Options.Platform;
1187    const char *msg;
1188
1189    disp->DriverData = (void *) dri2_dpy;
1190    if (disp->PlatformDisplay == NULL) {
1191       dri2_dpy->conn = xcb_connect(NULL, &screen);
1192       dri2_dpy->own_device = true;
1193    } else {
1194       Display *dpy = disp->PlatformDisplay;
1195
1196       dri2_dpy->conn = XGetXCBConnection(dpy);
1197       screen = DefaultScreen(dpy);
1198    }
1199
1200    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1201       msg = "xcb_connect failed";
1202       goto disconnect;
1203    }
1204
1205    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1206    dri2_dpy->screen = get_xcb_screen(s, screen);
1207    if (!dri2_dpy->screen) {
1208       msg = "failed to get xcb screen";
1209       goto disconnect;
1210    }
1211
1212    return EGL_TRUE;
1213 disconnect:
1214    if (disp->PlatformDisplay == NULL)
1215       xcb_disconnect(dri2_dpy->conn);
1216
1217    return _eglError(EGL_BAD_ALLOC, msg);
1218 }
1219
1220 static EGLBoolean
1221 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1222 {
1223    struct dri2_egl_display *dri2_dpy;
1224
1225    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1226    if (!dri2_dpy)
1227       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1228
1229    dri2_dpy->fd = -1;
1230    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1231       goto cleanup;
1232
1233    /*
1234     * Every hardware driver_name is set using strdup. Doing the same in
1235     * here will allow is to simply free the memory at dri2_terminate().
1236     */
1237    dri2_dpy->driver_name = strdup("swrast");
1238    if (!dri2_load_driver_swrast(disp))
1239       goto cleanup;
1240
1241    dri2_dpy->loader_extensions = swrast_loader_extensions;
1242
1243    if (!dri2_create_screen(disp))
1244       goto cleanup;
1245
1246    if (!dri2_setup_extensions(disp))
1247       goto cleanup;
1248
1249    dri2_setup_screen(disp);
1250
1251    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1252       goto cleanup;
1253
1254    /* Fill vtbl last to prevent accidentally calling virtual function during
1255     * initialization.
1256     */
1257    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1258
1259    return EGL_TRUE;
1260
1261  cleanup:
1262    dri2_display_destroy(disp);
1263    return EGL_FALSE;
1264 }
1265
1266 static void
1267 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1268 {
1269    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1270    int arbitrary_max_interval = 1000;
1271
1272    /* default behavior for no SwapBuffers support: no vblank syncing
1273     * either.
1274     */
1275    dri2_dpy->min_swap_interval = 0;
1276    dri2_dpy->max_swap_interval = 0;
1277
1278    if (!dri2_dpy->swap_available)
1279       return;
1280
1281    /* If we do have swapbuffers, then we can support pretty much any swap
1282     * interval.
1283     */
1284    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1285 }
1286
1287 #ifdef HAVE_DRI3
1288
1289 static const __DRIextension *dri3_image_loader_extensions[] = {
1290    &dri3_image_loader_extension.base,
1291    &image_lookup_extension.base,
1292    &use_invalidate.base,
1293    &background_callable_extension.base,
1294    NULL,
1295 };
1296
1297 static EGLBoolean
1298 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1299 {
1300    struct dri2_egl_display *dri2_dpy;
1301
1302    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1303    if (!dri2_dpy)
1304       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1305
1306    dri2_dpy->fd = -1;
1307    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1308       goto cleanup;
1309
1310    if (!dri3_x11_connect(dri2_dpy))
1311       goto cleanup;
1312
1313    if (!dri2_load_driver_dri3(disp))
1314       goto cleanup;
1315
1316    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1317
1318    dri2_dpy->swap_available = true;
1319    dri2_dpy->invalidate_available = true;
1320
1321    if (!dri2_create_screen(disp))
1322       goto cleanup;
1323
1324    if (!dri2_setup_extensions(disp))
1325       goto cleanup;
1326
1327    dri2_setup_screen(disp);
1328
1329    dri2_x11_setup_swap_interval(disp);
1330
1331    if (!dri2_dpy->is_different_gpu)
1332       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1333    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1334    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1335    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1336
1337    dri2_set_WL_bind_wayland_display(drv, disp);
1338
1339    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1340       goto cleanup;
1341
1342    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1343    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1344    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1345    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1346    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1347    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1348
1349    /* Fill vtbl last to prevent accidentally calling virtual function during
1350     * initialization.
1351     */
1352    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1353
1354    _eglLog(_EGL_INFO, "Using DRI3");
1355
1356    return EGL_TRUE;
1357
1358  cleanup:
1359    dri2_display_destroy(disp);
1360    return EGL_FALSE;
1361 }
1362 #endif
1363
1364 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1365    .base = { __DRI_DRI2_LOADER, 2 },
1366
1367    .getBuffers           = dri2_x11_get_buffers,
1368    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1369    .getBuffersWithFormat = NULL,
1370 };
1371
1372 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1373    .base = { __DRI_DRI2_LOADER, 3 },
1374
1375    .getBuffers           = dri2_x11_get_buffers,
1376    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1377    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1378 };
1379
1380 static const __DRIextension *dri2_loader_extensions_old[] = {
1381    &dri2_loader_extension_old.base,
1382    &image_lookup_extension.base,
1383    &background_callable_extension.base,
1384    NULL,
1385 };
1386
1387 static const __DRIextension *dri2_loader_extensions[] = {
1388    &dri2_loader_extension.base,
1389    &image_lookup_extension.base,
1390    &use_invalidate.base,
1391    &background_callable_extension.base,
1392    NULL,
1393 };
1394
1395 static EGLBoolean
1396 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1397 {
1398    struct dri2_egl_display *dri2_dpy;
1399
1400    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1401    if (!dri2_dpy)
1402       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1403
1404    dri2_dpy->fd = -1;
1405    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1406       goto cleanup;
1407
1408    if (!dri2_x11_connect(dri2_dpy))
1409       goto cleanup;
1410
1411    if (!dri2_load_driver(disp))
1412       goto cleanup;
1413
1414    if (dri2_dpy->dri2_minor >= 1)
1415       dri2_dpy->loader_extensions = dri2_loader_extensions;
1416    else
1417       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1418
1419    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1420    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1421
1422    if (!dri2_create_screen(disp))
1423       goto cleanup;
1424
1425    if (!dri2_setup_extensions(disp))
1426       goto cleanup;
1427
1428    dri2_setup_screen(disp);
1429
1430    dri2_x11_setup_swap_interval(disp);
1431
1432    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1433    disp->Extensions.NOK_swap_region = EGL_TRUE;
1434    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1435    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1436    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1437
1438    dri2_set_WL_bind_wayland_display(drv, disp);
1439
1440    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1441       goto cleanup;
1442
1443    /* Fill vtbl last to prevent accidentally calling virtual function during
1444     * initialization.
1445     */
1446    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1447
1448    _eglLog(_EGL_INFO, "Using DRI2");
1449
1450    return EGL_TRUE;
1451
1452  cleanup:
1453    dri2_display_destroy(disp);
1454    return EGL_FALSE;
1455 }
1456
1457 EGLBoolean
1458 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1459 {
1460    EGLBoolean initialized = EGL_FALSE;
1461
1462    if (!env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false)) {
1463 #ifdef HAVE_DRI3
1464       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1465          initialized = dri2_initialize_x11_dri3(drv, disp);
1466 #endif
1467
1468       if (!initialized)
1469          initialized = dri2_initialize_x11_dri2(drv, disp);
1470    }
1471
1472    if (!initialized)
1473       initialized = dri2_initialize_x11_swrast(drv, disp);
1474
1475    return initialized;
1476 }
1477