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 30:
  79       case 24:
  80          dri2_surf->bytes_per_pixel = 4;
  81          break;
  82       case 16:
  83          dri2_surf->bytes_per_pixel = 2;
  84          break;
  85       case 8:
  86          dri2_surf->bytes_per_pixel = 1;
  87          break;
  88       case 0:
  89          dri2_surf->bytes_per_pixel = 0;
  90          break;
  91       default:
  92          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  93    }
  94 }
  95
  96 static void
  97 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  98                       struct dri2_egl_surface * dri2_surf)
  99 {
 100    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 101    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 102 }
 103
 104 static bool
 105 x11_get_drawable_info(__DRIdrawable * draw,
 106                       int *x, int *y, int *w, int *h,
 107                       void *loaderPrivate)
 108 {
 109    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 110    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 111
 112    xcb_get_geometry_cookie_t cookie;
 113    xcb_get_geometry_reply_t *reply;
 114    xcb_generic_error_t *error;
 115    bool ret;
 116
 117    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 118    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 119    if (reply == NULL)
 120       return false;
 121
 122    if (error != NULL) {
 123       ret = false;
 124       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 125       free(error);
 126    } else {
 127       *x = reply->x;
 128       *y = reply->y;
 129       *w = reply->width;
 130       *h = reply->height;
 131       ret = true;
 132    }
 133    free(reply);
 134    return ret;
 135 }
 136
 137 static void
 138 swrastGetDrawableInfo(__DRIdrawable * draw,
 139                       int *x, int *y, int *w, int *h,
 140                       void *loaderPrivate)
 141 {
 142    *x = *y = *w = *h = 0;
 143    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 144 }
 145
 146 static void
 147 swrastPutImage(__DRIdrawable * draw, int op,
 148                int x, int y, int w, int h,
 149                char *data, void *loaderPrivate)
 150 {
 151    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 152    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 153
 154    xcb_gcontext_t gc;
 155
 156    switch (op) {
 157    case __DRI_SWRAST_IMAGE_OP_DRAW:
 158       gc = dri2_surf->gc;
 159       break;
 160    case __DRI_SWRAST_IMAGE_OP_SWAP:
 161       gc = dri2_surf->swapgc;
 162       break;
 163    default:
 164       return;
 165    }
 166
 167    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 168                  gc, w, h, x, y, 0, dri2_surf->depth,
 169                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 170 }
 171
 172 static void
 173 swrastGetImage(__DRIdrawable * read,
 174                int x, int y, int w, int h,
 175                char *data, void *loaderPrivate)
 176 {
 177    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 178    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 179
 180    xcb_get_image_cookie_t cookie;
 181    xcb_get_image_reply_t *reply;
 182    xcb_generic_error_t *error;
 183
 184    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 185                            dri2_surf->drawable, x, y, w, h, ~0);
 186    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 187    if (reply == NULL)
 188       return;
 189
 190    if (error != NULL) {
 191       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 192       free(error);
 193    } else {
 194       uint32_t bytes = xcb_get_image_data_length(reply);
 195       uint8_t *idata = xcb_get_image_data(reply);
 196       memcpy(data, idata, bytes);
 197    }
 198    free(reply);
 199 }
 200
 201
 202 static xcb_screen_t *
 203 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 204 {
 205     for (; iter.rem; --screen, xcb_screen_next(&iter))
 206         if (screen == 0)
 207             return iter.data;
 208
 209     return NULL;
 210 }
 211
 212
 213 /**
 214  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 215  */
 216 static _EGLSurface *
 217 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 218                         _EGLConfig *conf, void *native_surface,
 219                         const EGLint *attrib_list)
 220 {
 221    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 222    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 223    struct dri2_egl_surface *dri2_surf;
 224    xcb_get_geometry_cookie_t cookie;
 225    xcb_get_geometry_reply_t *reply;
 226    xcb_generic_error_t *error;
 227    const __DRIconfig *config;
 228
 229    (void) drv;
 230
 231    dri2_surf = malloc(sizeof *dri2_surf);
 232    if (!dri2_surf) {
 233       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 234       return NULL;
 235    }
 236
 237    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list, false))
 238       goto cleanup_surf;
 239
 240    dri2_surf->region = XCB_NONE;
 241    if (type == EGL_PBUFFER_BIT) {
 242       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 243       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 244                        dri2_surf->drawable, dri2_dpy->screen->root,
 245                         dri2_surf->base.Width, dri2_surf->base.Height);
 246    } else {
 247       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 248       dri2_surf->drawable = (uintptr_t) native_surface;
 249    }
 250
 251    config = dri2_get_dri_config(dri2_conf, type,
 252                                 dri2_surf->base.GLColorspace);
 253
 254    if (dri2_dpy->dri2) {
 255       dri2_surf->dri_drawable =
 256          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 257                                            dri2_surf);
 258    } else {
 259       assert(dri2_dpy->swrast);
 260       dri2_surf->dri_drawable =
 261          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 262                                              dri2_surf);
 263    }
 264
 265    if (dri2_surf->dri_drawable == NULL) {
 266       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 267       goto cleanup_pixmap;
 268    }
 269
 270    if (type != EGL_PBUFFER_BIT) {
 271       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 272       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 273       if (error != NULL) {
 274          if (error->error_code == BadAlloc)
 275             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 276          else if (type == EGL_WINDOW_BIT)
 277             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 278          else
 279             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 280          free(error);
 281          goto cleanup_dri_drawable;
 282       } else if (reply == NULL) {
 283          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 284          goto cleanup_dri_drawable;
 285       }
 286
 287       dri2_surf->base.Width = reply->width;
 288       dri2_surf->base.Height = reply->height;
 289       dri2_surf->depth = reply->depth;
 290       free(reply);
 291    }
 292
 293    if (dri2_dpy->dri2) {
 294       xcb_void_cookie_t cookie;
 295       int conn_error;
 296
 297       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 298                                                 dri2_surf->drawable);
 299       error = xcb_request_check(dri2_dpy->conn, cookie);
 300       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 301       if (conn_error || error != NULL) {
 302          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 303             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 304          else if (type == EGL_WINDOW_BIT)
 305             _eglError(EGL_BAD_NATIVE_WINDOW,
 306                       "xcb_dri2_create_drawable_checked");
 307          else
 308             _eglError(EGL_BAD_NATIVE_PIXMAP,
 309                       "xcb_dri2_create_drawable_checked");
 310          free(error);
 311          goto cleanup_dri_drawable;
 312       }
 313    } else {
 314       if (type == EGL_PBUFFER_BIT) {
 315          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 316       }
 317       swrastCreateDrawable(dri2_dpy, dri2_surf);
 318    }
 319
 320    /* we always copy the back buffer to front */
 321    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 322
 323    return &dri2_surf->base;
 324
 325  cleanup_dri_drawable:
 326    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 327  cleanup_pixmap:
 328    if (type == EGL_PBUFFER_BIT)
 329       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 330  cleanup_surf:
 331    free(dri2_surf);
 332
 333    return NULL;
 334 }
 335
 336 /**
 337  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 338  */
 339 static _EGLSurface *
 340 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 341                                _EGLConfig *conf, void *native_window,
 342                                const EGLint *attrib_list)
 343 {
 344    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 345    _EGLSurface *surf;
 346
 347    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 348                                   native_window, attrib_list);
 349    if (surf != NULL) {
 350       /* When we first create the DRI2 drawable, its swap interval on the
 351        * server side is 1.
 352        */
 353       surf->SwapInterval = 1;
 354
 355       /* Override that with a driconf-set value. */
 356       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 357    }
 358
 359    return surf;
 360 }
 361
 362 static _EGLSurface *
 363 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 364                                _EGLConfig *conf, void *native_pixmap,
 365                                const EGLint *attrib_list)
 366 {
 367    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 368                                   native_pixmap, attrib_list);
 369 }
 370
 371 static _EGLSurface *
 372 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 373                                 _EGLConfig *conf, const EGLint *attrib_list)
 374 {
 375    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 376                                   NULL, attrib_list);
 377 }
 378
 379 static EGLBoolean
 380 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 381 {
 382    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 383    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 384
 385    (void) drv;
 386
 387    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 388
 389    if (dri2_dpy->dri2) {
 390       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 391    } else {
 392       assert(dri2_dpy->swrast);
 393       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 394    }
 395
 396    if (surf->Type == EGL_PBUFFER_BIT)
 397       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 398
 399    dri2_fini_surface(surf);
 400    free(surf);
 401
 402    return EGL_TRUE;
 403 }
 404
 405 /**
 406  * Function utilizes swrastGetDrawableInfo to get surface
 407  * geometry from x server and calls default query surface
 408  * implementation that returns the updated values.
 409  *
 410  * In case of errors we still return values that we currently
 411  * have.
 412  */
 413 static EGLBoolean
 414 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 415                    _EGLSurface *surf, EGLint attribute,
 416                    EGLint *value)
 417 {
 418    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 419    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 420    int x, y, w, h;
 421
 422    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 423
 424    switch (attribute) {
 425    case EGL_WIDTH:
 426    case EGL_HEIGHT:
 427       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 428          surf->Width = w;
 429          surf->Height = h;
 430       }
 431       break;
 432    default:
 433       break;
 434    }
 435    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 436 }
 437
 438 /**
 439  * Process list of buffer received from the server
 440  *
 441  * Processes the list of buffers received in a reply from the server to either
 442  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 443  */
 444 static void
 445 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 446                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 447 {
 448    struct dri2_egl_display *dri2_dpy =
 449       dri2_egl_display(dri2_surf->base.Resource.Display);
 450    xcb_rectangle_t rectangle;
 451
 452    dri2_surf->have_fake_front = false;
 453
 454    /* This assumes the DRI2 buffer attachment tokens matches the
 455     * __DRIbuffer tokens. */
 456    for (unsigned i = 0; i < count; i++) {
 457       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 458       dri2_surf->buffers[i].name = buffers[i].name;
 459       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 460       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 461       dri2_surf->buffers[i].flags = buffers[i].flags;
 462
 463       /* We only use the DRI drivers single buffer configs.  This
 464        * means that if we try to render to a window, DRI2 will give us
 465        * the fake front buffer, which we'll use as a back buffer.
 466        * Note that EGL doesn't require that several clients rendering
 467        * to the same window must see the same aux buffers. */
 468       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 469          dri2_surf->have_fake_front = true;
 470    }
 471
 472    if (dri2_surf->region != XCB_NONE)
 473       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 474
 475    rectangle.x = 0;
 476    rectangle.y = 0;
 477    rectangle.width = dri2_surf->base.Width;
 478    rectangle.height = dri2_surf->base.Height;
 479    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 480    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 481 }
 482
 483 static __DRIbuffer *
 484 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 485                      int *width, int *height,
 486                      unsigned int *attachments, int count,
 487                      int *out_count, void *loaderPrivate)
 488 {
 489    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 490    struct dri2_egl_display *dri2_dpy =
 491       dri2_egl_display(dri2_surf->base.Resource.Display);
 492    xcb_dri2_dri2_buffer_t *buffers;
 493    xcb_dri2_get_buffers_reply_t *reply;
 494    xcb_dri2_get_buffers_cookie_t cookie;
 495
 496    (void) driDrawable;
 497
 498    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 499                                             dri2_surf->drawable,
 500                                             count, count, attachments);
 501    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 502    if (reply == NULL)
 503       return NULL;
 504    buffers = xcb_dri2_get_buffers_buffers (reply);
 505    if (buffers == NULL)
 506       return NULL;
 507
 508    *out_count = reply->count;
 509    dri2_surf->base.Width = *width = reply->width;
 510    dri2_surf->base.Height = *height = reply->height;
 511    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 512
 513    free(reply);
 514
 515    return dri2_surf->buffers;
 516 }
 517
 518 static __DRIbuffer *
 519 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 520                                  int *width, int *height,
 521                                  unsigned int *attachments, int count,
 522                                  int *out_count, void *loaderPrivate)
 523 {
 524    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 525    struct dri2_egl_display *dri2_dpy =
 526       dri2_egl_display(dri2_surf->base.Resource.Display);
 527    xcb_dri2_dri2_buffer_t *buffers;
 528    xcb_dri2_get_buffers_with_format_reply_t *reply;
 529    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 530    xcb_dri2_attach_format_t *format_attachments;
 531
 532    (void) driDrawable;
 533
 534    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 535    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 536                                                         dri2_surf->drawable,
 537                                                         count, count,
 538                                                         format_attachments);
 539
 540    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 541                                                    cookie, NULL);
 542    if (reply == NULL)
 543       return NULL;
 544
 545    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 546    dri2_surf->base.Width = *width = reply->width;
 547    dri2_surf->base.Height = *height = reply->height;
 548    *out_count = reply->count;
 549    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 550
 551    free(reply);
 552
 553    return dri2_surf->buffers;
 554 }
 555
 556 static void
 557 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 558 {
 559    (void) driDrawable;
 560
 561    /* FIXME: Does EGL support front buffer rendering at all? */
 562
 563 #if 0
 564    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 565
 566    dri2WaitGL(dri2_surf);
 567 #else
 568    (void) loaderPrivate;
 569 #endif
 570 }
 571
 572 static int
 573 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 574 {
 575    xcb_dri2_authenticate_reply_t *authenticate;
 576    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 577    int ret = 0;
 578
 579    authenticate_cookie =
 580       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 581    authenticate =
 582       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 583
 584    if (authenticate == NULL || !authenticate->authenticated)
 585       ret = -1;
 586
 587    free(authenticate);
 588
 589    return ret;
 590 }
 591
 592 static EGLBoolean
 593 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 594 {
 595 #ifdef HAVE_LIBDRM
 596    drm_magic_t magic;
 597
 598    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 599       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 600       return EGL_FALSE;
 601    }
 602
 603    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 604       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 605       return EGL_FALSE;
 606    }
 607 #endif
 608    return EGL_TRUE;
 609 }
 610
 611 static EGLBoolean
 612 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 613 {
 614    xcb_xfixes_query_version_reply_t *xfixes_query;
 615    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 616    xcb_dri2_query_version_reply_t *dri2_query;
 617    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 618    xcb_dri2_connect_reply_t *connect;
 619    xcb_dri2_connect_cookie_t connect_cookie;
 620    xcb_generic_error_t *error;
 621    char *driver_name, *loader_driver_name, *device_name;
 622    const xcb_query_extension_reply_t *extension;
 623
 624    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 625    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 626
 627    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 628    if (!(extension && extension->present))
 629       return EGL_FALSE;
 630
 631    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 632    if (!(extension && extension->present))
 633       return EGL_FALSE;
 634
 635    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 636                                                   XCB_XFIXES_MAJOR_VERSION,
 637                                                   XCB_XFIXES_MINOR_VERSION);
 638
 639    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 640                                                XCB_DRI2_MAJOR_VERSION,
 641                                                XCB_DRI2_MINOR_VERSION);
 642
 643    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 644                                    XCB_DRI2_DRIVER_TYPE_DRI);
 645
 646    xfixes_query =
 647       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 648                                       xfixes_query_cookie, &error);
 649    if (xfixes_query == NULL ||
 650        error != NULL || xfixes_query->major_version < 2) {
 651       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 652       free(error);
 653       free(xfixes_query);
 654       return EGL_FALSE;
 655    }
 656    free(xfixes_query);
 657
 658    dri2_query =
 659       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 660    if (dri2_query == NULL || error != NULL) {
 661       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 662       free(error);
 663       return EGL_FALSE;
 664    }
 665    dri2_dpy->dri2_major = dri2_query->major_version;
 666    dri2_dpy->dri2_minor = dri2_query->minor_version;
 667    free(dri2_query);
 668
 669    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 670    if (connect == NULL ||
 671        connect->driver_name_length + connect->device_name_length == 0) {
 672       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 673       return EGL_FALSE;
 674    }
 675
 676    device_name = xcb_dri2_connect_device_name (connect);
 677
 678    dri2_dpy->fd = loader_open_device(device_name);
 679    if (dri2_dpy->fd == -1) {
 680       _eglLog(_EGL_WARNING,
 681               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 682       free(connect);
 683       return EGL_FALSE;
 684    }
 685
 686    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 687       close(dri2_dpy->fd);
 688       free(connect);
 689       return EGL_FALSE;
 690    }
 691
 692    driver_name = xcb_dri2_connect_driver_name (connect);
 693
 694    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 695     * Otherwise, default to the server's value.
 696     */
 697    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 698    if (loader_driver_name) {
 699       dri2_dpy->driver_name = loader_driver_name;
 700    } else {
 701       dri2_dpy->driver_name =
 702          strndup(driver_name,
 703                  xcb_dri2_connect_driver_name_length(connect));
 704    }
 705
 706    if (dri2_dpy->driver_name == NULL) {
 707       close(dri2_dpy->fd);
 708       free(connect);
 709       return EGL_FALSE;
 710    }
 711
 712 #ifdef HAVE_WAYLAND_PLATFORM
 713    dri2_dpy->device_name =
 714       strndup(device_name,
 715               xcb_dri2_connect_device_name_length(connect));
 716 #endif
 717
 718    free(connect);
 719
 720    return EGL_TRUE;
 721 }
 722
 723 static int
 724 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 725 {
 726    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 727
 728    return dri2_x11_do_authenticate(dri2_dpy, id);
 729 }
 730
 731 static EGLBoolean
 732 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 733                                  _EGLDisplay *disp, bool supports_preserved)
 734 {
 735    xcb_depth_iterator_t d;
 736    xcb_visualtype_t *visuals;
 737    int config_count = 0;
 738    EGLint surface_type;
 739
 740    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 741
 742    surface_type =
 743       EGL_WINDOW_BIT |
 744       EGL_PIXMAP_BIT |
 745       EGL_PBUFFER_BIT;
 746
 747    if (supports_preserved)
 748       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 749
 750    while (d.rem > 0) {
 751       EGLBoolean class_added[6] = { 0, };
 752
 753       visuals = xcb_depth_visuals(d.data);
 754
 755       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 756          if (class_added[visuals[i]._class])
 757             continue;
 758
 759          class_added[visuals[i]._class] = EGL_TRUE;
 760
 761          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 762             struct dri2_egl_config *dri2_conf;
 763             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 764
 765             const EGLint config_attrs[] = {
 766                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 767                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 768                     EGL_NONE
 769             };
 770
 771             unsigned int rgba_masks[4] = {
 772                visuals[i].red_mask,
 773                visuals[i].green_mask,
 774                visuals[i].blue_mask,
 775                0,
 776             };
 777
 778             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 779                                         surface_type, config_attrs,
 780                                         rgba_masks);
 781             if (dri2_conf)
 782                if (dri2_conf->base.ConfigID == config_count + 1)
 783                   config_count++;
 784
 785             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 786              * Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
 787              * Otherwise it will only match a 32-bit RGBA visual.  On a
 788              * composited window manager on X11, this will make all of the
 789              * EGLConfigs with destination alpha get blended by the
 790              * compositor.  This is probably not what the application
 791              * wants... especially on drivers that only have 32-bit RGBA
 792              * EGLConfigs! */
 793             if (d.data->depth == 24 || d.data->depth == 30) {
 794                rgba_masks[3] =
 795                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 796                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 797                                            surface_type, config_attrs,
 798                                            rgba_masks);
 799                if (dri2_conf)
 800                   if (dri2_conf->base.ConfigID == config_count + 1)
 801                      config_count++;
 802             }
 803          }
 804       }
 805
 806       xcb_depth_next(&d);
 807    }
 808
 809    if (!config_count) {
 810       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 811       return EGL_FALSE;
 812    }
 813
 814    return EGL_TRUE;
 815 }
 816
 817 static EGLBoolean
 818 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 819                  _EGLSurface *draw, xcb_xfixes_region_t region)
 820 {
 821    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 822    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 823    enum xcb_dri2_attachment_t render_attachment;
 824    xcb_dri2_copy_region_cookie_t cookie;
 825
 826    /* No-op for a pixmap or pbuffer surface */
 827    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 828       return EGL_TRUE;
 829
 830    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 831
 832    if (dri2_surf->have_fake_front)
 833       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 834    else
 835       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 836
 837    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 838                                            dri2_surf->drawable,
 839                                            region,
 840                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 841                                            render_attachment);
 842    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 843
 844    return EGL_TRUE;
 845 }
 846
 847 static int64_t
 848 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 849                           int64_t msc, int64_t divisor, int64_t remainder)
 850 {
 851    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 852    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 853    uint32_t msc_hi = msc >> 32;
 854    uint32_t msc_lo = msc & 0xffffffff;
 855    uint32_t divisor_hi = divisor >> 32;
 856    uint32_t divisor_lo = divisor & 0xffffffff;
 857    uint32_t remainder_hi = remainder >> 32;
 858    uint32_t remainder_lo = remainder & 0xffffffff;
 859    xcb_dri2_swap_buffers_cookie_t cookie;
 860    xcb_dri2_swap_buffers_reply_t *reply;
 861    int64_t swap_count = -1;
 862
 863    /* No-op for a pixmap or pbuffer surface */
 864    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 865       return 0;
 866
 867    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 868       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 869
 870    dri2_flush_drawable_for_swapbuffers(disp, draw);
 871
 872    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 873                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 874
 875    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 876
 877    if (reply) {
 878       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 879       free(reply);
 880    }
 881
 882    /* Since we aren't watching for the server's invalidate events like we're
 883     * supposed to (due to XCB providing no mechanism for filtering the events
 884     * the way xlib does), and SwapBuffers is a common cause of invalidate
 885     * events, just shove one down to the driver, even though we haven't told
 886     * the driver that we're the kind of loader that provides reliable
 887     * invalidate events.  This causes the driver to request buffers again at
 888     * its next draw, so that we get the correct buffers if a pageflip
 889     * happened.  The driver should still be using the viewport hack to catch
 890     * window resizes.
 891     */
 892    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 893       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 894
 895    return swap_count;
 896 }
 897
 898 static EGLBoolean
 899 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 900 {
 901    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 902    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 903
 904    if (!dri2_dpy->flush) {
 905       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 906       return EGL_TRUE;
 907    }
 908
 909    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 910       /* Swap failed with a window drawable. */
 911       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 912    }
 913    return EGL_TRUE;
 914 }
 915
 916 static EGLBoolean
 917 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 918                              _EGLSurface *draw,
 919                              EGLint numRects, const EGLint *rects)
 920 {
 921    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 922    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 923    EGLBoolean ret;
 924    xcb_xfixes_region_t region;
 925    xcb_rectangle_t rectangles[16];
 926
 927    if (numRects > (int)ARRAY_SIZE(rectangles))
 928       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 929
 930    for (int i = 0; i < numRects; i++) {
 931       rectangles[i].x = rects[i * 4];
 932       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 933       rectangles[i].width = rects[i * 4 + 2];
 934       rectangles[i].height = rects[i * 4 + 3];
 935    }
 936
 937    region = xcb_generate_id(dri2_dpy->conn);
 938    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 939    ret = dri2_copy_region(drv, disp, draw, region);
 940    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 941
 942    return ret;
 943 }
 944
 945 static EGLBoolean
 946 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 947                      EGLint x, EGLint y, EGLint width, EGLint height)
 948 {
 949    const EGLint rect[4] = { x, y, width, height };
 950
 951    if (x < 0 || y < 0 || width < 0 || height < 0)
 952       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 953
 954    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 955 }
 956
 957 static EGLBoolean
 958 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 959                        EGLint interval)
 960 {
 961    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 962    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 963
 964    if (dri2_dpy->swap_available)
 965       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 966
 967    return EGL_TRUE;
 968 }
 969
 970 static EGLBoolean
 971 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 972                       void *native_pixmap_target)
 973 {
 974    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 975    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 976    xcb_gcontext_t gc;
 977    xcb_pixmap_t target;
 978
 979    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 980    target = (uintptr_t) native_pixmap_target;
 981
 982    (void) drv;
 983
 984    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 985
 986    gc = xcb_generate_id(dri2_dpy->conn);
 987    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 988    xcb_copy_area(dri2_dpy->conn,
 989                   dri2_surf->drawable,
 990                   target,
 991                   gc,
 992                   0, 0,
 993                   0, 0,
 994                   dri2_surf->base.Width,
 995                   dri2_surf->base.Height);
 996    xcb_free_gc(dri2_dpy->conn, gc);
 997
 998    return EGL_TRUE;
 999 }
1000
1001 static _EGLImage *
1002 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1003                              EGLClientBuffer buffer, const EGLint *attr_list)
1004 {
1005    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1006    struct dri2_egl_image *dri2_img;
1007    unsigned int attachments[1];
1008    xcb_drawable_t drawable;
1009    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1010    xcb_dri2_get_buffers_reply_t *buffers_reply;
1011    xcb_dri2_dri2_buffer_t *buffers;
1012    xcb_get_geometry_cookie_t geometry_cookie;
1013    xcb_get_geometry_reply_t *geometry_reply;
1014    xcb_generic_error_t *error;
1015    int stride, format;
1016
1017    (void) ctx;
1018
1019    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1020    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1021    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1022    buffers_cookie =
1023       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1024                                       drawable, 1, 1, attachments);
1025    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1026    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1027                                                buffers_cookie, NULL);
1028    if (buffers_reply == NULL)
1029      return NULL;
1030
1031    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1032    if (buffers == NULL) {
1033       return NULL;
1034    }
1035
1036    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1037                                             geometry_cookie, &error);
1038    if (geometry_reply == NULL || error != NULL) {
1039       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1040       free(error);
1041       free(buffers_reply);
1042       return NULL;
1043    }
1044
1045    switch (geometry_reply->depth) {
1046    case 16:
1047       format = __DRI_IMAGE_FORMAT_RGB565;
1048       break;
1049    case 24:
1050       format = __DRI_IMAGE_FORMAT_XRGB8888;
1051       break;
1052    case 30:
1053       format = __DRI_IMAGE_FORMAT_XRGB2101010;
1054       break;
1055    case 32:
1056       format = __DRI_IMAGE_FORMAT_ARGB8888;
1057       break;
1058    default:
1059       _eglError(EGL_BAD_PARAMETER,
1060                 "dri2_create_image_khr: unsupported pixmap depth");
1061       free(buffers_reply);
1062       free(geometry_reply);
1063       return NULL;
1064    }
1065
1066    dri2_img = malloc(sizeof *dri2_img);
1067    if (!dri2_img) {
1068       free(buffers_reply);
1069       free(geometry_reply);
1070       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1071       return EGL_NO_IMAGE_KHR;
1072    }
1073
1074    _eglInitImage(&dri2_img->base, disp);
1075
1076    stride = buffers[0].pitch / buffers[0].cpp;
1077    dri2_img->dri_image =
1078       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1079                                            buffers_reply->width,
1080                                            buffers_reply->height,
1081                                            format,
1082                                            buffers[0].name,
1083                                            stride,
1084                                            dri2_img);
1085
1086    free(buffers_reply);
1087    free(geometry_reply);
1088
1089    return &dri2_img->base;
1090 }
1091
1092 static _EGLImage *
1093 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1094                           _EGLContext *ctx, EGLenum target,
1095                           EGLClientBuffer buffer, const EGLint *attr_list)
1096 {
1097    (void) drv;
1098
1099    switch (target) {
1100    case EGL_NATIVE_PIXMAP_KHR:
1101       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1102    default:
1103       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1104    }
1105 }
1106
1107 static EGLBoolean
1108 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1109                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1110                          EGLuint64KHR *sbc)
1111 {
1112    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1113    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1114    xcb_dri2_get_msc_cookie_t cookie;
1115    xcb_dri2_get_msc_reply_t *reply;
1116
1117    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1118    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1119
1120    if (!reply)
1121       return _eglError(EGL_BAD_ACCESS, __func__);
1122
1123    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1124    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1125    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1126    free(reply);
1127
1128    return EGL_TRUE;
1129 }
1130
1131 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1132    .authenticate = NULL,
1133    .create_window_surface = dri2_x11_create_window_surface,
1134    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1135    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1136    .destroy_surface = dri2_x11_destroy_surface,
1137    .create_image = dri2_create_image_khr,
1138    .swap_buffers = dri2_x11_swap_buffers,
1139    .set_damage_region = dri2_fallback_set_damage_region,
1140    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1141    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1142    .copy_buffers = dri2_x11_copy_buffers,
1143    .query_buffer_age = dri2_fallback_query_buffer_age,
1144    .query_surface = dri2_query_surface,
1145    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1146    .get_sync_values = dri2_fallback_get_sync_values,
1147    .get_dri_drawable = dri2_surface_get_dri_drawable,
1148 };
1149
1150 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1151    .authenticate = dri2_x11_authenticate,
1152    .create_window_surface = dri2_x11_create_window_surface,
1153    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1154    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1155    .destroy_surface = dri2_x11_destroy_surface,
1156    .create_image = dri2_x11_create_image_khr,
1157    .swap_interval = dri2_x11_swap_interval,
1158    .swap_buffers = dri2_x11_swap_buffers,
1159    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1160    .swap_buffers_region = dri2_x11_swap_buffers_region,
1161    .set_damage_region = dri2_fallback_set_damage_region,
1162    .post_sub_buffer = dri2_x11_post_sub_buffer,
1163    .copy_buffers = dri2_x11_copy_buffers,
1164    .query_buffer_age = dri2_fallback_query_buffer_age,
1165    .query_surface = dri2_query_surface,
1166    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1167    .get_sync_values = dri2_x11_get_sync_values,
1168    .get_dri_drawable = dri2_surface_get_dri_drawable,
1169 };
1170
1171 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1172    .base = { __DRI_SWRAST_LOADER, 1 },
1173
1174    .getDrawableInfo = swrastGetDrawableInfo,
1175    .putImage        = swrastPutImage,
1176    .getImage        = swrastGetImage,
1177 };
1178
1179 static const __DRIextension *swrast_loader_extensions[] = {
1180    &swrast_loader_extension.base,
1181    &image_lookup_extension.base,
1182    NULL,
1183 };
1184
1185 static EGLBoolean
1186 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1187                         struct dri2_egl_display *dri2_dpy)
1188 {
1189    xcb_screen_iterator_t s;
1190    int screen = (uintptr_t)disp->Options.Platform;
1191    const char *msg;
1192
1193    disp->DriverData = (void *) dri2_dpy;
1194    if (disp->PlatformDisplay == NULL) {
1195       dri2_dpy->conn = xcb_connect(NULL, &screen);
1196       dri2_dpy->own_device = true;
1197    } else {
1198       Display *dpy = disp->PlatformDisplay;
1199
1200       dri2_dpy->conn = XGetXCBConnection(dpy);
1201       screen = DefaultScreen(dpy);
1202    }
1203
1204    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1205       msg = "xcb_connect failed";
1206       goto disconnect;
1207    }
1208
1209    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1210    dri2_dpy->screen = get_xcb_screen(s, screen);
1211    if (!dri2_dpy->screen) {
1212       msg = "failed to get xcb screen";
1213       goto disconnect;
1214    }
1215
1216    return EGL_TRUE;
1217 disconnect:
1218    if (disp->PlatformDisplay == NULL)
1219       xcb_disconnect(dri2_dpy->conn);
1220
1221    return _eglError(EGL_BAD_ALLOC, msg);
1222 }
1223
1224 static EGLBoolean
1225 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1226 {
1227    struct dri2_egl_display *dri2_dpy;
1228
1229    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1230    if (!dri2_dpy)
1231       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1232
1233    dri2_dpy->fd = -1;
1234    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1235       goto cleanup;
1236
1237    /*
1238     * Every hardware driver_name is set using strdup. Doing the same in
1239     * here will allow is to simply free the memory at dri2_terminate().
1240     */
1241    dri2_dpy->driver_name = strdup("swrast");
1242    if (!dri2_load_driver_swrast(disp))
1243       goto cleanup;
1244
1245    dri2_dpy->loader_extensions = swrast_loader_extensions;
1246
1247    if (!dri2_create_screen(disp))
1248       goto cleanup;
1249
1250    if (!dri2_setup_extensions(disp))
1251       goto cleanup;
1252
1253    dri2_setup_screen(disp);
1254
1255    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1256       goto cleanup;
1257
1258    /* Fill vtbl last to prevent accidentally calling virtual function during
1259     * initialization.
1260     */
1261    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1262
1263    return EGL_TRUE;
1264
1265  cleanup:
1266    dri2_display_destroy(disp);
1267    return EGL_FALSE;
1268 }
1269
1270 static void
1271 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1272 {
1273    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1274    int arbitrary_max_interval = 1000;
1275
1276    /* default behavior for no SwapBuffers support: no vblank syncing
1277     * either.
1278     */
1279    dri2_dpy->min_swap_interval = 0;
1280    dri2_dpy->max_swap_interval = 0;
1281    dri2_dpy->default_swap_interval = 0;
1282
1283    if (!dri2_dpy->swap_available)
1284       return;
1285
1286    /* If we do have swapbuffers, then we can support pretty much any swap
1287     * interval.
1288     */
1289    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1290 }
1291
1292 #ifdef HAVE_DRI3
1293
1294 static const __DRIextension *dri3_image_loader_extensions[] = {
1295    &dri3_image_loader_extension.base,
1296    &image_lookup_extension.base,
1297    &use_invalidate.base,
1298    &background_callable_extension.base,
1299    NULL,
1300 };
1301
1302 static EGLBoolean
1303 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1304 {
1305    struct dri2_egl_display *dri2_dpy;
1306
1307    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1308    if (!dri2_dpy)
1309       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1310
1311    dri2_dpy->fd = -1;
1312    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1313       goto cleanup;
1314
1315    if (!dri3_x11_connect(dri2_dpy))
1316       goto cleanup;
1317
1318    if (!dri2_load_driver_dri3(disp))
1319       goto cleanup;
1320
1321    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1322
1323    dri2_dpy->swap_available = true;
1324    dri2_dpy->invalidate_available = true;
1325
1326    if (!dri2_create_screen(disp))
1327       goto cleanup;
1328
1329    if (!dri2_setup_extensions(disp))
1330       goto cleanup;
1331
1332    dri2_setup_screen(disp);
1333
1334    dri2_x11_setup_swap_interval(disp);
1335
1336    if (!dri2_dpy->is_different_gpu)
1337       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1338    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1339    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1340    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1341
1342    dri2_set_WL_bind_wayland_display(drv, disp);
1343
1344    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1345       goto cleanup;
1346
1347    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1348    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1349    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1350    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1351    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1352    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1353
1354    /* Fill vtbl last to prevent accidentally calling virtual function during
1355     * initialization.
1356     */
1357    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1358
1359    _eglLog(_EGL_INFO, "Using DRI3");
1360
1361    return EGL_TRUE;
1362
1363  cleanup:
1364    dri2_display_destroy(disp);
1365    return EGL_FALSE;
1366 }
1367 #endif
1368
1369 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1370    .base = { __DRI_DRI2_LOADER, 2 },
1371
1372    .getBuffers           = dri2_x11_get_buffers,
1373    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1374    .getBuffersWithFormat = NULL,
1375 };
1376
1377 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1378    .base = { __DRI_DRI2_LOADER, 3 },
1379
1380    .getBuffers           = dri2_x11_get_buffers,
1381    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1382    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1383 };
1384
1385 static const __DRIextension *dri2_loader_extensions_old[] = {
1386    &dri2_loader_extension_old.base,
1387    &image_lookup_extension.base,
1388    &background_callable_extension.base,
1389    NULL,
1390 };
1391
1392 static const __DRIextension *dri2_loader_extensions[] = {
1393    &dri2_loader_extension.base,
1394    &image_lookup_extension.base,
1395    &use_invalidate.base,
1396    &background_callable_extension.base,
1397    NULL,
1398 };
1399
1400 static EGLBoolean
1401 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1402 {
1403    struct dri2_egl_display *dri2_dpy;
1404
1405    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1406    if (!dri2_dpy)
1407       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1408
1409    dri2_dpy->fd = -1;
1410    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1411       goto cleanup;
1412
1413    if (!dri2_x11_connect(dri2_dpy))
1414       goto cleanup;
1415
1416    if (!dri2_load_driver(disp))
1417       goto cleanup;
1418
1419    if (dri2_dpy->dri2_minor >= 1)
1420       dri2_dpy->loader_extensions = dri2_loader_extensions;
1421    else
1422       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1423
1424    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1425    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1426
1427    if (!dri2_create_screen(disp))
1428       goto cleanup;
1429
1430    if (!dri2_setup_extensions(disp))
1431       goto cleanup;
1432
1433    dri2_setup_screen(disp);
1434
1435    dri2_x11_setup_swap_interval(disp);
1436
1437    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1438    disp->Extensions.NOK_swap_region = EGL_TRUE;
1439    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1440    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1441    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1442
1443    dri2_set_WL_bind_wayland_display(drv, disp);
1444
1445    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1446       goto cleanup;
1447
1448    /* Fill vtbl last to prevent accidentally calling virtual function during
1449     * initialization.
1450     */
1451    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1452
1453    _eglLog(_EGL_INFO, "Using DRI2");
1454
1455    return EGL_TRUE;
1456
1457  cleanup:
1458    dri2_display_destroy(disp);
1459    return EGL_FALSE;
1460 }
1461
1462 EGLBoolean
1463 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1464 {
1465    EGLBoolean initialized = EGL_FALSE;
1466
1467    if (!disp->Options.ForceSoftware) {
1468 #ifdef HAVE_DRI3
1469       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1470          initialized = dri2_initialize_x11_dri3(drv, disp);
1471 #endif
1472
1473       if (!initialized)
1474          initialized = dri2_initialize_x11_dri2(drv, disp);
1475    }
1476
1477    if (!initialized)
1478       initialized = dri2_initialize_x11_swrast(drv, disp);
1479
1480    return initialized;
1481 }
1482
1483 void
1484 dri2_teardown_x11(struct dri2_egl_display *dri2_dpy)
1485 {
1486    if (dri2_dpy->own_device)
1487       xcb_disconnect(dri2_dpy->conn);
1488 }