src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/macros.h"
  44
  45 #include "egl_dri2.h"
  46 #include "egl_dri2_fallbacks.h"
  47 #include "loader.h"
  48
  49 #ifdef HAVE_DRI3
  50 #include "platform_x11_dri3.h"
  51 #endif
  52
  53 static EGLBoolean
  54 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  55                        EGLint interval);
  56
  57 static void
  58 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  59                      struct dri2_egl_surface * dri2_surf)
  60 {
  61    uint32_t           mask;
  62    const uint32_t     function = GXcopy;
  63    uint32_t           valgc[2];
  64
  65    /* create GC's */
  66    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  67    mask = XCB_GC_FUNCTION;
  68    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  69
  70    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  72    valgc[0] = function;
  73    valgc[1] = False;
  74    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  75    switch (dri2_surf->depth) {
  76       case 32:
  77       case 24:
  78          dri2_surf->bytes_per_pixel = 4;
  79          break;
  80       case 16:
  81          dri2_surf->bytes_per_pixel = 2;
  82          break;
  83       case 8:
  84          dri2_surf->bytes_per_pixel = 1;
  85          break;
  86       case 0:
  87          dri2_surf->bytes_per_pixel = 0;
  88          break;
  89       default:
  90          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  91    }
  92 }
  93
  94 static void
  95 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  96                       struct dri2_egl_surface * dri2_surf)
  97 {
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  99    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 100 }
 101
 102 static bool
 103 x11_get_drawable_info(__DRIdrawable * draw,
 104                       int *x, int *y, int *w, int *h,
 105                       void *loaderPrivate)
 106 {
 107    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 108    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 109
 110    xcb_get_geometry_cookie_t cookie;
 111    xcb_get_geometry_reply_t *reply;
 112    xcb_generic_error_t *error;
 113    bool ret;
 114
 115    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 116    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 117    if (reply == NULL)
 118       return false;
 119
 120    if (error != NULL) {
 121       ret = false;
 122       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 123       free(error);
 124    } else {
 125       *x = reply->x;
 126       *y = reply->y;
 127       *w = reply->width;
 128       *h = reply->height;
 129       ret = true;
 130    }
 131    free(reply);
 132    return ret;
 133 }
 134
 135 static void
 136 swrastGetDrawableInfo(__DRIdrawable * draw,
 137                       int *x, int *y, int *w, int *h,
 138                       void *loaderPrivate)
 139 {
 140    *x = *y = *w = *h = 0;
 141    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 142 }
 143
 144 static void
 145 swrastPutImage(__DRIdrawable * draw, int op,
 146                int x, int y, int w, int h,
 147                char *data, void *loaderPrivate)
 148 {
 149    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 150    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 151
 152    xcb_gcontext_t gc;
 153
 154    switch (op) {
 155    case __DRI_SWRAST_IMAGE_OP_DRAW:
 156       gc = dri2_surf->gc;
 157       break;
 158    case __DRI_SWRAST_IMAGE_OP_SWAP:
 159       gc = dri2_surf->swapgc;
 160       break;
 161    default:
 162       return;
 163    }
 164
 165    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 166                  gc, w, h, x, y, 0, dri2_surf->depth,
 167                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 168 }
 169
 170 static void
 171 swrastGetImage(__DRIdrawable * read,
 172                int x, int y, int w, int h,
 173                char *data, void *loaderPrivate)
 174 {
 175    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 176    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 177
 178    xcb_get_image_cookie_t cookie;
 179    xcb_get_image_reply_t *reply;
 180    xcb_generic_error_t *error;
 181
 182    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 183                            dri2_surf->drawable, x, y, w, h, ~0);
 184    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 185    if (reply == NULL)
 186       return;
 187
 188    if (error != NULL) {
 189       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 190       free(error);
 191    } else {
 192       uint32_t bytes = xcb_get_image_data_length(reply);
 193       uint8_t *idata = xcb_get_image_data(reply);
 194       memcpy(data, idata, bytes);
 195    }
 196    free(reply);
 197 }
 198
 199
 200 static xcb_screen_t *
 201 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 202 {
 203     for (; iter.rem; --screen, xcb_screen_next(&iter))
 204         if (screen == 0)
 205             return iter.data;
 206
 207     return NULL;
 208 }
 209
 210
 211 /**
 212  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 213  */
 214 static _EGLSurface *
 215 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 216                         _EGLConfig *conf, void *native_surface,
 217                         const EGLint *attrib_list)
 218 {
 219    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 220    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 221    struct dri2_egl_surface *dri2_surf;
 222    xcb_get_geometry_cookie_t cookie;
 223    xcb_get_geometry_reply_t *reply;
 224    xcb_generic_error_t *error;
 225    const __DRIconfig *config;
 226
 227    (void) drv;
 228
 229    dri2_surf = malloc(sizeof *dri2_surf);
 230    if (!dri2_surf) {
 231       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 232       return NULL;
 233    }
 234
 235    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 236       goto cleanup_surf;
 237
 238    dri2_surf->region = XCB_NONE;
 239    if (type == EGL_PBUFFER_BIT) {
 240       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 241       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 242                        dri2_surf->drawable, dri2_dpy->screen->root,
 243                         dri2_surf->base.Width, dri2_surf->base.Height);
 244    } else {
 245       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 246       dri2_surf->drawable = (uintptr_t) native_surface;
 247    }
 248
 249    config = dri2_get_dri_config(dri2_conf, type,
 250                                 dri2_surf->base.GLColorspace);
 251
 252    if (dri2_dpy->dri2) {
 253       dri2_surf->dri_drawable =
 254          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 255                                            dri2_surf);
 256    } else {
 257       assert(dri2_dpy->swrast);
 258       dri2_surf->dri_drawable =
 259          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 260                                              dri2_surf);
 261    }
 262
 263    if (dri2_surf->dri_drawable == NULL) {
 264       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 265       goto cleanup_pixmap;
 266    }
 267
 268    if (type != EGL_PBUFFER_BIT) {
 269       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 270       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 271       if (error != NULL) {
 272          if (error->error_code == BadAlloc)
 273             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 274          else if (type == EGL_WINDOW_BIT)
 275             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 276          else
 277             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 278          free(error);
 279          goto cleanup_dri_drawable;
 280       } else if (reply == NULL) {
 281          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 282          goto cleanup_dri_drawable;
 283       }
 284
 285       dri2_surf->base.Width = reply->width;
 286       dri2_surf->base.Height = reply->height;
 287       dri2_surf->depth = reply->depth;
 288       free(reply);
 289    }
 290
 291    if (dri2_dpy->dri2) {
 292       xcb_void_cookie_t cookie;
 293       int conn_error;
 294
 295       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 296                                                 dri2_surf->drawable);
 297       error = xcb_request_check(dri2_dpy->conn, cookie);
 298       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 299       if (conn_error || error != NULL) {
 300          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 301             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 302          else if (type == EGL_WINDOW_BIT)
 303             _eglError(EGL_BAD_NATIVE_WINDOW,
 304                       "xcb_dri2_create_drawable_checked");
 305          else
 306             _eglError(EGL_BAD_NATIVE_PIXMAP,
 307                       "xcb_dri2_create_drawable_checked");
 308          free(error);
 309          goto cleanup_dri_drawable;
 310       }
 311    } else {
 312       if (type == EGL_PBUFFER_BIT) {
 313          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 314       }
 315       swrastCreateDrawable(dri2_dpy, dri2_surf);
 316    }
 317
 318    /* we always copy the back buffer to front */
 319    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 320
 321    return &dri2_surf->base;
 322
 323  cleanup_dri_drawable:
 324    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 325  cleanup_pixmap:
 326    if (type == EGL_PBUFFER_BIT)
 327       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 328  cleanup_surf:
 329    free(dri2_surf);
 330
 331    return NULL;
 332 }
 333
 334 /**
 335  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 336  */
 337 static _EGLSurface *
 338 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 339                                _EGLConfig *conf, void *native_window,
 340                                const EGLint *attrib_list)
 341 {
 342    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 343    _EGLSurface *surf;
 344
 345    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 346                                   native_window, attrib_list);
 347    if (surf != NULL) {
 348       /* When we first create the DRI2 drawable, its swap interval on the
 349        * server side is 1.
 350        */
 351       surf->SwapInterval = 1;
 352
 353       /* Override that with a driconf-set value. */
 354       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 355    }
 356
 357    return surf;
 358 }
 359
 360 static _EGLSurface *
 361 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 362                                _EGLConfig *conf, void *native_pixmap,
 363                                const EGLint *attrib_list)
 364 {
 365    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 366                                   native_pixmap, attrib_list);
 367 }
 368
 369 static _EGLSurface *
 370 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 371                                 _EGLConfig *conf, const EGLint *attrib_list)
 372 {
 373    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 374                                   NULL, attrib_list);
 375 }
 376
 377 static EGLBoolean
 378 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 379 {
 380    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 381    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 382
 383    (void) drv;
 384
 385    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 386
 387    if (dri2_dpy->dri2) {
 388       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 389    } else {
 390       assert(dri2_dpy->swrast);
 391       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 392    }
 393
 394    if (surf->Type == EGL_PBUFFER_BIT)
 395       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 396
 397    free(surf);
 398
 399    return EGL_TRUE;
 400 }
 401
 402 /**
 403  * Function utilizes swrastGetDrawableInfo to get surface
 404  * geometry from x server and calls default query surface
 405  * implementation that returns the updated values.
 406  *
 407  * In case of errors we still return values that we currently
 408  * have.
 409  */
 410 static EGLBoolean
 411 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 412                    _EGLSurface *surf, EGLint attribute,
 413                    EGLint *value)
 414 {
 415    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 416    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 417    int x, y, w, h;
 418
 419    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 420
 421    switch (attribute) {
 422    case EGL_WIDTH:
 423    case EGL_HEIGHT:
 424       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 425          surf->Width = w;
 426          surf->Height = h;
 427       }
 428       break;
 429    default:
 430       break;
 431    }
 432    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 433 }
 434
 435 /**
 436  * Process list of buffer received from the server
 437  *
 438  * Processes the list of buffers received in a reply from the server to either
 439  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 440  */
 441 static void
 442 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 443                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 444 {
 445    struct dri2_egl_display *dri2_dpy =
 446       dri2_egl_display(dri2_surf->base.Resource.Display);
 447    xcb_rectangle_t rectangle;
 448
 449    dri2_surf->have_fake_front = false;
 450
 451    /* This assumes the DRI2 buffer attachment tokens matches the
 452     * __DRIbuffer tokens. */
 453    for (unsigned i = 0; i < count; i++) {
 454       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 455       dri2_surf->buffers[i].name = buffers[i].name;
 456       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 457       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 458       dri2_surf->buffers[i].flags = buffers[i].flags;
 459
 460       /* We only use the DRI drivers single buffer configs.  This
 461        * means that if we try to render to a window, DRI2 will give us
 462        * the fake front buffer, which we'll use as a back buffer.
 463        * Note that EGL doesn't require that several clients rendering
 464        * to the same window must see the same aux buffers. */
 465       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 466          dri2_surf->have_fake_front = true;
 467    }
 468
 469    if (dri2_surf->region != XCB_NONE)
 470       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 471
 472    rectangle.x = 0;
 473    rectangle.y = 0;
 474    rectangle.width = dri2_surf->base.Width;
 475    rectangle.height = dri2_surf->base.Height;
 476    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 477    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 478 }
 479
 480 static __DRIbuffer *
 481 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 482                      int *width, int *height,
 483                      unsigned int *attachments, int count,
 484                      int *out_count, void *loaderPrivate)
 485 {
 486    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 487    struct dri2_egl_display *dri2_dpy =
 488       dri2_egl_display(dri2_surf->base.Resource.Display);
 489    xcb_dri2_dri2_buffer_t *buffers;
 490    xcb_dri2_get_buffers_reply_t *reply;
 491    xcb_dri2_get_buffers_cookie_t cookie;
 492
 493    (void) driDrawable;
 494
 495    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 496                                             dri2_surf->drawable,
 497                                             count, count, attachments);
 498    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 499    if (reply == NULL)
 500       return NULL;
 501    buffers = xcb_dri2_get_buffers_buffers (reply);
 502    if (buffers == NULL)
 503       return NULL;
 504
 505    *out_count = reply->count;
 506    dri2_surf->base.Width = *width = reply->width;
 507    dri2_surf->base.Height = *height = reply->height;
 508    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 509
 510    free(reply);
 511
 512    return dri2_surf->buffers;
 513 }
 514
 515 static __DRIbuffer *
 516 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 517                                  int *width, int *height,
 518                                  unsigned int *attachments, int count,
 519                                  int *out_count, void *loaderPrivate)
 520 {
 521    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 522    struct dri2_egl_display *dri2_dpy =
 523       dri2_egl_display(dri2_surf->base.Resource.Display);
 524    xcb_dri2_dri2_buffer_t *buffers;
 525    xcb_dri2_get_buffers_with_format_reply_t *reply;
 526    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 527    xcb_dri2_attach_format_t *format_attachments;
 528
 529    (void) driDrawable;
 530
 531    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 532    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 533                                                         dri2_surf->drawable,
 534                                                         count, count,
 535                                                         format_attachments);
 536
 537    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 538                                                    cookie, NULL);
 539    if (reply == NULL)
 540       return NULL;
 541
 542    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 543    dri2_surf->base.Width = *width = reply->width;
 544    dri2_surf->base.Height = *height = reply->height;
 545    *out_count = reply->count;
 546    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 547
 548    free(reply);
 549
 550    return dri2_surf->buffers;
 551 }
 552
 553 static void
 554 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 555 {
 556    (void) driDrawable;
 557
 558    /* FIXME: Does EGL support front buffer rendering at all? */
 559
 560 #if 0
 561    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 562
 563    dri2WaitGL(dri2_surf);
 564 #else
 565    (void) loaderPrivate;
 566 #endif
 567 }
 568
 569 static int
 570 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 571 {
 572    xcb_dri2_authenticate_reply_t *authenticate;
 573    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 574    int ret = 0;
 575
 576    authenticate_cookie =
 577       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 578    authenticate =
 579       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 580
 581    if (authenticate == NULL || !authenticate->authenticated)
 582       ret = -1;
 583
 584    free(authenticate);
 585
 586    return ret;
 587 }
 588
 589 static EGLBoolean
 590 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 591 {
 592 #ifdef HAVE_LIBDRM
 593    drm_magic_t magic;
 594
 595    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 596       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 597       return EGL_FALSE;
 598    }
 599
 600    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 601       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 602       return EGL_FALSE;
 603    }
 604 #endif
 605    return EGL_TRUE;
 606 }
 607
 608 static EGLBoolean
 609 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 610 {
 611    xcb_xfixes_query_version_reply_t *xfixes_query;
 612    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 613    xcb_dri2_query_version_reply_t *dri2_query;
 614    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 615    xcb_dri2_connect_reply_t *connect;
 616    xcb_dri2_connect_cookie_t connect_cookie;
 617    xcb_generic_error_t *error;
 618    char *driver_name, *loader_driver_name, *device_name;
 619    const xcb_query_extension_reply_t *extension;
 620
 621    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 622    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 623
 624    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 625    if (!(extension && extension->present))
 626       return EGL_FALSE;
 627
 628    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 629    if (!(extension && extension->present))
 630       return EGL_FALSE;
 631
 632    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 633                                                   XCB_XFIXES_MAJOR_VERSION,
 634                                                   XCB_XFIXES_MINOR_VERSION);
 635
 636    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 637                                                XCB_DRI2_MAJOR_VERSION,
 638                                                XCB_DRI2_MINOR_VERSION);
 639
 640    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 641                                    XCB_DRI2_DRIVER_TYPE_DRI);
 642
 643    xfixes_query =
 644       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 645                                       xfixes_query_cookie, &error);
 646    if (xfixes_query == NULL ||
 647        error != NULL || xfixes_query->major_version < 2) {
 648       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 649       free(error);
 650       free(xfixes_query);
 651       return EGL_FALSE;
 652    }
 653    free(xfixes_query);
 654
 655    dri2_query =
 656       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 657    if (dri2_query == NULL || error != NULL) {
 658       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 659       free(error);
 660       return EGL_FALSE;
 661    }
 662    dri2_dpy->dri2_major = dri2_query->major_version;
 663    dri2_dpy->dri2_minor = dri2_query->minor_version;
 664    free(dri2_query);
 665
 666    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 667    if (connect == NULL ||
 668        connect->driver_name_length + connect->device_name_length == 0) {
 669       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 670       return EGL_FALSE;
 671    }
 672
 673    device_name = xcb_dri2_connect_device_name (connect);
 674
 675    dri2_dpy->fd = loader_open_device(device_name);
 676    if (dri2_dpy->fd == -1) {
 677       _eglLog(_EGL_WARNING,
 678               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 679       free(connect);
 680       return EGL_FALSE;
 681    }
 682
 683    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 684       close(dri2_dpy->fd);
 685       free(connect);
 686       return EGL_FALSE;
 687    }
 688
 689    driver_name = xcb_dri2_connect_driver_name (connect);
 690
 691    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 692     * Otherwise, default to the server's value.
 693     */
 694    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 695    if (loader_driver_name) {
 696       dri2_dpy->driver_name = loader_driver_name;
 697    } else {
 698       dri2_dpy->driver_name =
 699          strndup(driver_name,
 700                  xcb_dri2_connect_driver_name_length(connect));
 701    }
 702
 703    if (dri2_dpy->driver_name == NULL) {
 704       close(dri2_dpy->fd);
 705       free(dri2_dpy->driver_name);
 706       free(connect);
 707       return EGL_FALSE;
 708    }
 709
 710 #ifdef HAVE_WAYLAND_PLATFORM
 711    dri2_dpy->device_name =
 712       strndup(device_name,
 713               xcb_dri2_connect_device_name_length(connect));
 714 #endif
 715
 716    free(connect);
 717
 718    return EGL_TRUE;
 719 }
 720
 721 static int
 722 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 723 {
 724    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 725
 726    return dri2_x11_do_authenticate(dri2_dpy, id);
 727 }
 728
 729 static EGLBoolean
 730 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 731                                  _EGLDisplay *disp, bool supports_preserved)
 732 {
 733    xcb_depth_iterator_t d;
 734    xcb_visualtype_t *visuals;
 735    int config_count = 0;
 736    EGLint surface_type;
 737
 738    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 739
 740    surface_type =
 741       EGL_WINDOW_BIT |
 742       EGL_PIXMAP_BIT |
 743       EGL_PBUFFER_BIT;
 744
 745    if (supports_preserved)
 746       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 747
 748    while (d.rem > 0) {
 749       EGLBoolean class_added[6] = { 0, };
 750
 751       visuals = xcb_depth_visuals(d.data);
 752
 753       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 754          if (class_added[visuals[i]._class])
 755             continue;
 756
 757          class_added[visuals[i]._class] = EGL_TRUE;
 758
 759          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 760             struct dri2_egl_config *dri2_conf;
 761             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 762
 763             const EGLint config_attrs[] = {
 764                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 765                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 766                     EGL_NONE
 767             };
 768
 769             unsigned int rgba_masks[4] = {
 770                visuals[i].red_mask,
 771                visuals[i].green_mask,
 772                visuals[i].blue_mask,
 773                0,
 774             };
 775
 776             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 777                                         surface_type, config_attrs,
 778                                         rgba_masks);
 779             if (dri2_conf)
 780                if (dri2_conf->base.ConfigID == config_count + 1)
 781                   config_count++;
 782
 783             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 784              * Otherwise it will only match a 32-bit RGBA visual.  On a
 785              * composited window manager on X11, this will make all of the
 786              * EGLConfigs with destination alpha get blended by the
 787              * compositor.  This is probably not what the application
 788              * wants... especially on drivers that only have 32-bit RGBA
 789              * EGLConfigs! */
 790             if (d.data->depth == 24) {
 791                rgba_masks[3] =
 792                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 793                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 794                                            surface_type, config_attrs,
 795                                            rgba_masks);
 796                if (dri2_conf)
 797                   if (dri2_conf->base.ConfigID == config_count + 1)
 798                      config_count++;
 799             }
 800          }
 801       }
 802
 803       xcb_depth_next(&d);
 804    }
 805
 806    if (!config_count) {
 807       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 808       return EGL_FALSE;
 809    }
 810
 811    return EGL_TRUE;
 812 }
 813
 814 static EGLBoolean
 815 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 816                  _EGLSurface *draw, xcb_xfixes_region_t region)
 817 {
 818    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 819    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 820    enum xcb_dri2_attachment_t render_attachment;
 821    xcb_dri2_copy_region_cookie_t cookie;
 822
 823    /* No-op for a pixmap or pbuffer surface */
 824    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 825       return EGL_TRUE;
 826
 827    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 828
 829    if (dri2_surf->have_fake_front)
 830       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 831    else
 832       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 833
 834    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 835                                            dri2_surf->drawable,
 836                                            region,
 837                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 838                                            render_attachment);
 839    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 840
 841    return EGL_TRUE;
 842 }
 843
 844 static int64_t
 845 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 846                           int64_t msc, int64_t divisor, int64_t remainder)
 847 {
 848    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 849    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 850    uint32_t msc_hi = msc >> 32;
 851    uint32_t msc_lo = msc & 0xffffffff;
 852    uint32_t divisor_hi = divisor >> 32;
 853    uint32_t divisor_lo = divisor & 0xffffffff;
 854    uint32_t remainder_hi = remainder >> 32;
 855    uint32_t remainder_lo = remainder & 0xffffffff;
 856    xcb_dri2_swap_buffers_cookie_t cookie;
 857    xcb_dri2_swap_buffers_reply_t *reply;
 858    int64_t swap_count = -1;
 859
 860    /* No-op for a pixmap or pbuffer surface */
 861    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 862       return 0;
 863
 864    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 865       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 866
 867    dri2_flush_drawable_for_swapbuffers(disp, draw);
 868
 869    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 870                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 871
 872    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 873
 874    if (reply) {
 875       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 876       free(reply);
 877    }
 878
 879    /* Since we aren't watching for the server's invalidate events like we're
 880     * supposed to (due to XCB providing no mechanism for filtering the events
 881     * the way xlib does), and SwapBuffers is a common cause of invalidate
 882     * events, just shove one down to the driver, even though we haven't told
 883     * the driver that we're the kind of loader that provides reliable
 884     * invalidate events.  This causes the driver to request buffers again at
 885     * its next draw, so that we get the correct buffers if a pageflip
 886     * happened.  The driver should still be using the viewport hack to catch
 887     * window resizes.
 888     */
 889    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 890       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 891
 892    return swap_count;
 893 }
 894
 895 static EGLBoolean
 896 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 897 {
 898    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 899    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 900
 901    if (!dri2_dpy->flush) {
 902       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 903       return EGL_TRUE;
 904    }
 905
 906    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 907       /* Swap failed with a window drawable. */
 908       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 909    }
 910    return EGL_TRUE;
 911 }
 912
 913 static EGLBoolean
 914 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 915                              _EGLSurface *draw,
 916                              EGLint numRects, const EGLint *rects)
 917 {
 918    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 919    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 920    EGLBoolean ret;
 921    xcb_xfixes_region_t region;
 922    xcb_rectangle_t rectangles[16];
 923
 924    if (numRects > (int)ARRAY_SIZE(rectangles))
 925       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 926
 927    for (int i = 0; i < numRects; i++) {
 928       rectangles[i].x = rects[i * 4];
 929       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 930       rectangles[i].width = rects[i * 4 + 2];
 931       rectangles[i].height = rects[i * 4 + 3];
 932    }
 933
 934    region = xcb_generate_id(dri2_dpy->conn);
 935    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 936    ret = dri2_copy_region(drv, disp, draw, region);
 937    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 938
 939    return ret;
 940 }
 941
 942 static EGLBoolean
 943 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 944                      EGLint x, EGLint y, EGLint width, EGLint height)
 945 {
 946    const EGLint rect[4] = { x, y, width, height };
 947
 948    if (x < 0 || y < 0 || width < 0 || height < 0)
 949       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 950
 951    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 952 }
 953
 954 static EGLBoolean
 955 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 956                        EGLint interval)
 957 {
 958    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 959    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 960
 961    if (dri2_dpy->swap_available)
 962       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 963
 964    return EGL_TRUE;
 965 }
 966
 967 static EGLBoolean
 968 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 969                       void *native_pixmap_target)
 970 {
 971    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 972    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 973    xcb_gcontext_t gc;
 974    xcb_pixmap_t target;
 975
 976    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 977    target = (uintptr_t) native_pixmap_target;
 978
 979    (void) drv;
 980
 981    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 982
 983    gc = xcb_generate_id(dri2_dpy->conn);
 984    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 985    xcb_copy_area(dri2_dpy->conn,
 986                   dri2_surf->drawable,
 987                   target,
 988                   gc,
 989                   0, 0,
 990                   0, 0,
 991                   dri2_surf->base.Width,
 992                   dri2_surf->base.Height);
 993    xcb_free_gc(dri2_dpy->conn, gc);
 994
 995    return EGL_TRUE;
 996 }
 997
 998 static _EGLImage *
 999 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1000                              EGLClientBuffer buffer, const EGLint *attr_list)
1001 {
1002    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1003    struct dri2_egl_image *dri2_img;
1004    unsigned int attachments[1];
1005    xcb_drawable_t drawable;
1006    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1007    xcb_dri2_get_buffers_reply_t *buffers_reply;
1008    xcb_dri2_dri2_buffer_t *buffers;
1009    xcb_get_geometry_cookie_t geometry_cookie;
1010    xcb_get_geometry_reply_t *geometry_reply;
1011    xcb_generic_error_t *error;
1012    int stride, format;
1013
1014    (void) ctx;
1015
1016    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1017    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1018    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1019    buffers_cookie =
1020       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1021                                       drawable, 1, 1, attachments);
1022    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1023    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1024                                                buffers_cookie, NULL);
1025    if (buffers_reply == NULL)
1026      return NULL;
1027
1028    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1029    if (buffers == NULL) {
1030       return NULL;
1031    }
1032
1033    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1034                                             geometry_cookie, &error);
1035    if (geometry_reply == NULL || error != NULL) {
1036       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1037       free(error);
1038       free(buffers_reply);
1039       return NULL;
1040    }
1041
1042    switch (geometry_reply->depth) {
1043    case 16:
1044       format = __DRI_IMAGE_FORMAT_RGB565;
1045       break;
1046    case 24:
1047       format = __DRI_IMAGE_FORMAT_XRGB8888;
1048       break;
1049    case 32:
1050       format = __DRI_IMAGE_FORMAT_ARGB8888;
1051       break;
1052    default:
1053       _eglError(EGL_BAD_PARAMETER,
1054                 "dri2_create_image_khr: unsupported pixmap depth");
1055       free(buffers_reply);
1056       free(geometry_reply);
1057       return NULL;
1058    }
1059
1060    dri2_img = malloc(sizeof *dri2_img);
1061    if (!dri2_img) {
1062       free(buffers_reply);
1063       free(geometry_reply);
1064       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1065       return EGL_NO_IMAGE_KHR;
1066    }
1067
1068    _eglInitImage(&dri2_img->base, disp);
1069
1070    stride = buffers[0].pitch / buffers[0].cpp;
1071    dri2_img->dri_image =
1072       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1073                                            buffers_reply->width,
1074                                            buffers_reply->height,
1075                                            format,
1076                                            buffers[0].name,
1077                                            stride,
1078                                            dri2_img);
1079
1080    free(buffers_reply);
1081    free(geometry_reply);
1082
1083    return &dri2_img->base;
1084 }
1085
1086 static _EGLImage *
1087 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1088                           _EGLContext *ctx, EGLenum target,
1089                           EGLClientBuffer buffer, const EGLint *attr_list)
1090 {
1091    (void) drv;
1092
1093    switch (target) {
1094    case EGL_NATIVE_PIXMAP_KHR:
1095       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1096    default:
1097       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1098    }
1099 }
1100
1101 static EGLBoolean
1102 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1103                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1104                          EGLuint64KHR *sbc)
1105 {
1106    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1107    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1108    xcb_dri2_get_msc_cookie_t cookie;
1109    xcb_dri2_get_msc_reply_t *reply;
1110
1111    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1112    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1113
1114    if (!reply)
1115       return _eglError(EGL_BAD_ACCESS, __func__);
1116
1117    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1118    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1119    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1120    free(reply);
1121
1122    return EGL_TRUE;
1123 }
1124
1125 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1126    .authenticate = NULL,
1127    .create_window_surface = dri2_x11_create_window_surface,
1128    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1129    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1130    .destroy_surface = dri2_x11_destroy_surface,
1131    .create_image = dri2_create_image_khr,
1132    .swap_interval = dri2_fallback_swap_interval,
1133    .swap_buffers = dri2_x11_swap_buffers,
1134    .set_damage_region = dri2_fallback_set_damage_region,
1135    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1136    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1137    .copy_buffers = dri2_x11_copy_buffers,
1138    .query_buffer_age = dri2_fallback_query_buffer_age,
1139    .query_surface = dri2_query_surface,
1140    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1141    .get_sync_values = dri2_fallback_get_sync_values,
1142    .get_dri_drawable = dri2_surface_get_dri_drawable,
1143 };
1144
1145 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1146    .authenticate = dri2_x11_authenticate,
1147    .create_window_surface = dri2_x11_create_window_surface,
1148    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1149    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1150    .destroy_surface = dri2_x11_destroy_surface,
1151    .create_image = dri2_x11_create_image_khr,
1152    .swap_interval = dri2_x11_swap_interval,
1153    .swap_buffers = dri2_x11_swap_buffers,
1154    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1155    .swap_buffers_region = dri2_x11_swap_buffers_region,
1156    .set_damage_region = dri2_fallback_set_damage_region,
1157    .post_sub_buffer = dri2_x11_post_sub_buffer,
1158    .copy_buffers = dri2_x11_copy_buffers,
1159    .query_buffer_age = dri2_fallback_query_buffer_age,
1160    .query_surface = dri2_query_surface,
1161    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1162    .get_sync_values = dri2_x11_get_sync_values,
1163    .get_dri_drawable = dri2_surface_get_dri_drawable,
1164 };
1165
1166 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1167    .base = { __DRI_SWRAST_LOADER, 1 },
1168
1169    .getDrawableInfo = swrastGetDrawableInfo,
1170    .putImage        = swrastPutImage,
1171    .getImage        = swrastGetImage,
1172 };
1173
1174 static const __DRIextension *swrast_loader_extensions[] = {
1175    &swrast_loader_extension.base,
1176    &image_lookup_extension.base,
1177    NULL,
1178 };
1179
1180 static EGLBoolean
1181 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1182                         struct dri2_egl_display *dri2_dpy)
1183 {
1184    xcb_screen_iterator_t s;
1185    int screen = (uintptr_t)disp->Options.Platform;
1186    const char *msg;
1187
1188    disp->DriverData = (void *) dri2_dpy;
1189    if (disp->PlatformDisplay == NULL) {
1190       dri2_dpy->conn = xcb_connect(NULL, &screen);
1191       dri2_dpy->own_device = true;
1192    } else {
1193       Display *dpy = disp->PlatformDisplay;
1194
1195       dri2_dpy->conn = XGetXCBConnection(dpy);
1196       screen = DefaultScreen(dpy);
1197    }
1198
1199    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1200       msg = "xcb_connect failed";
1201       goto disconnect;
1202    }
1203
1204    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1205    dri2_dpy->screen = get_xcb_screen(s, screen);
1206    if (!dri2_dpy->screen) {
1207       msg = "failed to get xcb screen";
1208       goto disconnect;
1209    }
1210
1211    return EGL_TRUE;
1212 disconnect:
1213    if (disp->PlatformDisplay == NULL)
1214       xcb_disconnect(dri2_dpy->conn);
1215
1216    return _eglError(EGL_BAD_ALLOC, msg);
1217 }
1218
1219 static EGLBoolean
1220 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1221 {
1222    struct dri2_egl_display *dri2_dpy;
1223
1224    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1225    if (!dri2_dpy)
1226       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1227
1228    dri2_dpy->fd = -1;
1229    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1230       goto cleanup;
1231
1232    /*
1233     * Every hardware driver_name is set using strdup. Doing the same in
1234     * here will allow is to simply free the memory at dri2_terminate().
1235     */
1236    dri2_dpy->driver_name = strdup("swrast");
1237    if (!dri2_load_driver_swrast(disp))
1238       goto cleanup;
1239
1240    dri2_dpy->loader_extensions = swrast_loader_extensions;
1241
1242    if (!dri2_create_screen(disp))
1243       goto cleanup;
1244
1245    if (!dri2_setup_extensions(disp))
1246       goto cleanup;
1247
1248    dri2_setup_screen(disp);
1249
1250    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1251       goto cleanup;
1252
1253    /* Fill vtbl last to prevent accidentally calling virtual function during
1254     * initialization.
1255     */
1256    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1257
1258    return EGL_TRUE;
1259
1260  cleanup:
1261    dri2_display_destroy(disp);
1262    return EGL_FALSE;
1263 }
1264
1265 static void
1266 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1267 {
1268    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1269    int arbitrary_max_interval = 1000;
1270
1271    /* default behavior for no SwapBuffers support: no vblank syncing
1272     * either.
1273     */
1274    dri2_dpy->min_swap_interval = 0;
1275    dri2_dpy->max_swap_interval = 0;
1276
1277    if (!dri2_dpy->swap_available)
1278       return;
1279
1280    /* If we do have swapbuffers, then we can support pretty much any swap
1281     * interval.
1282     */
1283    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1284 }
1285
1286 #ifdef HAVE_DRI3
1287
1288 static const __DRIextension *dri3_image_loader_extensions[] = {
1289    &dri3_image_loader_extension.base,
1290    &image_lookup_extension.base,
1291    &use_invalidate.base,
1292    NULL,
1293 };
1294
1295 static EGLBoolean
1296 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1297 {
1298    struct dri2_egl_display *dri2_dpy;
1299
1300    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1301    if (!dri2_dpy)
1302       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1303
1304    dri2_dpy->fd = -1;
1305    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1306       goto cleanup;
1307
1308    if (!dri3_x11_connect(dri2_dpy))
1309       goto cleanup;
1310
1311    if (!dri2_load_driver_dri3(disp))
1312       goto cleanup;
1313
1314    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1315
1316    dri2_dpy->swap_available = true;
1317    dri2_dpy->invalidate_available = true;
1318
1319    if (!dri2_create_screen(disp))
1320       goto cleanup;
1321
1322    if (!dri2_setup_extensions(disp))
1323       goto cleanup;
1324
1325    dri2_setup_screen(disp);
1326
1327    dri2_x11_setup_swap_interval(disp);
1328
1329    if (!dri2_dpy->is_different_gpu)
1330       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1331    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1332    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1333    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1334
1335    dri2_set_WL_bind_wayland_display(drv, disp);
1336
1337    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1338       goto cleanup;
1339
1340    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1341    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1342    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1343    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1344    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1345    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1346
1347    /* Fill vtbl last to prevent accidentally calling virtual function during
1348     * initialization.
1349     */
1350    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1351
1352    _eglLog(_EGL_INFO, "Using DRI3");
1353
1354    return EGL_TRUE;
1355
1356  cleanup:
1357    dri2_display_destroy(disp);
1358    return EGL_FALSE;
1359 }
1360 #endif
1361
1362 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1363    .base = { __DRI_DRI2_LOADER, 2 },
1364
1365    .getBuffers           = dri2_x11_get_buffers,
1366    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1367    .getBuffersWithFormat = NULL,
1368 };
1369
1370 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1371    .base = { __DRI_DRI2_LOADER, 3 },
1372
1373    .getBuffers           = dri2_x11_get_buffers,
1374    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1375    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1376 };
1377
1378 static const __DRIextension *dri2_loader_extensions_old[] = {
1379    &dri2_loader_extension_old.base,
1380    &image_lookup_extension.base,
1381    &background_callable_extension.base,
1382    NULL,
1383 };
1384
1385 static const __DRIextension *dri2_loader_extensions[] = {
1386    &dri2_loader_extension.base,
1387    &image_lookup_extension.base,
1388    &background_callable_extension.base,
1389    NULL,
1390 };
1391
1392 static EGLBoolean
1393 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1394 {
1395    struct dri2_egl_display *dri2_dpy;
1396
1397    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1398    if (!dri2_dpy)
1399       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1400
1401    dri2_dpy->fd = -1;
1402    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1403       goto cleanup;
1404
1405    if (!dri2_x11_connect(dri2_dpy))
1406       goto cleanup;
1407
1408    if (!dri2_load_driver(disp))
1409       goto cleanup;
1410
1411    if (dri2_dpy->dri2_minor >= 1)
1412       dri2_dpy->loader_extensions = dri2_loader_extensions;
1413    else
1414       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1415
1416    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1417    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1418
1419    if (!dri2_create_screen(disp))
1420       goto cleanup;
1421
1422    if (!dri2_setup_extensions(disp))
1423       goto cleanup;
1424
1425    dri2_setup_screen(disp);
1426
1427    dri2_x11_setup_swap_interval(disp);
1428
1429    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1430    disp->Extensions.NOK_swap_region = EGL_TRUE;
1431    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1432    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1433    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1434
1435    dri2_set_WL_bind_wayland_display(drv, disp);
1436
1437    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1438       goto cleanup;
1439
1440    /* Fill vtbl last to prevent accidentally calling virtual function during
1441     * initialization.
1442     */
1443    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1444
1445    _eglLog(_EGL_INFO, "Using DRI2");
1446
1447    return EGL_TRUE;
1448
1449  cleanup:
1450    dri2_display_destroy(disp);
1451    return EGL_FALSE;
1452 }
1453
1454 EGLBoolean
1455 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1456 {
1457    EGLBoolean initialized = EGL_FALSE;
1458
1459    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1460 #ifdef HAVE_DRI3
1461       if (!getenv("LIBGL_DRI3_DISABLE"))
1462          initialized = dri2_initialize_x11_dri3(drv, disp);
1463 #endif
1464
1465       if (!initialized)
1466          initialized = dri2_initialize_x11_dri2(drv, disp);
1467    }
1468
1469    if (!initialized)
1470       initialized = dri2_initialize_x11_swrast(drv, disp);
1471
1472    return initialized;
1473 }
1474