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    xcb_drawable_t drawable;
 226    const __DRIconfig *config;
 227
 228    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 229    drawable = (uintptr_t) native_surface;
 230
 231    (void) drv;
 232
 233    dri2_surf = malloc(sizeof *dri2_surf);
 234    if (!dri2_surf) {
 235       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 236       return NULL;
 237    }
 238
 239    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 240       goto cleanup_surf;
 241
 242    dri2_surf->region = XCB_NONE;
 243    if (type == EGL_PBUFFER_BIT) {
 244       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 245       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 246                        dri2_surf->drawable, dri2_dpy->screen->root,
 247                         dri2_surf->base.Width, dri2_surf->base.Height);
 248    } else {
 249       dri2_surf->drawable = drawable;
 250    }
 251
 252    config = dri2_get_dri_config(dri2_conf, type,
 253                                 dri2_surf->base.GLColorspace);
 254
 255    if (dri2_dpy->dri2) {
 256       dri2_surf->dri_drawable =
 257          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 258                                            dri2_surf);
 259    } else {
 260       assert(dri2_dpy->swrast);
 261       dri2_surf->dri_drawable =
 262          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 263                                              dri2_surf);
 264    }
 265
 266    if (dri2_surf->dri_drawable == NULL) {
 267       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 268       goto cleanup_pixmap;
 269    }
 270
 271    if (type != EGL_PBUFFER_BIT) {
 272       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 273       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 274       if (error != NULL) {
 275          if (error->error_code == BadAlloc)
 276             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 277          else if (type == EGL_WINDOW_BIT)
 278             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 279          else
 280             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 281          free(error);
 282          goto cleanup_dri_drawable;
 283       } else if (reply == NULL) {
 284          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 285          goto cleanup_dri_drawable;
 286       }
 287
 288       dri2_surf->base.Width = reply->width;
 289       dri2_surf->base.Height = reply->height;
 290       dri2_surf->depth = reply->depth;
 291       free(reply);
 292    }
 293
 294    if (dri2_dpy->dri2) {
 295       xcb_void_cookie_t cookie;
 296       int conn_error;
 297
 298       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 299                                                 dri2_surf->drawable);
 300       error = xcb_request_check(dri2_dpy->conn, cookie);
 301       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 302       if (conn_error || error != NULL) {
 303          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 304             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 305          else if (type == EGL_WINDOW_BIT)
 306             _eglError(EGL_BAD_NATIVE_WINDOW,
 307                       "xcb_dri2_create_drawable_checked");
 308          else
 309             _eglError(EGL_BAD_NATIVE_PIXMAP,
 310                       "xcb_dri2_create_drawable_checked");
 311          free(error);
 312          goto cleanup_dri_drawable;
 313       }
 314    } else {
 315       if (type == EGL_PBUFFER_BIT) {
 316          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 317       }
 318       swrastCreateDrawable(dri2_dpy, dri2_surf);
 319    }
 320
 321    /* we always copy the back buffer to front */
 322    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 323
 324    return &dri2_surf->base;
 325
 326  cleanup_dri_drawable:
 327    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 328  cleanup_pixmap:
 329    if (type == EGL_PBUFFER_BIT)
 330       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 331  cleanup_surf:
 332    free(dri2_surf);
 333
 334    return NULL;
 335 }
 336
 337 /**
 338  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 339  */
 340 static _EGLSurface *
 341 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 342                                _EGLConfig *conf, void *native_window,
 343                                const EGLint *attrib_list)
 344 {
 345    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 346    _EGLSurface *surf;
 347
 348    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 349                                   native_window, attrib_list);
 350    if (surf != NULL) {
 351       /* When we first create the DRI2 drawable, its swap interval on the
 352        * server side is 1.
 353        */
 354       surf->SwapInterval = 1;
 355
 356       /* Override that with a driconf-set value. */
 357       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 358    }
 359
 360    return surf;
 361 }
 362
 363 static _EGLSurface *
 364 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 365                                _EGLConfig *conf, void *native_pixmap,
 366                                const EGLint *attrib_list)
 367 {
 368    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 369                                   native_pixmap, attrib_list);
 370 }
 371
 372 static _EGLSurface *
 373 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 374                                 _EGLConfig *conf, const EGLint *attrib_list)
 375 {
 376    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 377                                   XCB_WINDOW_NONE, attrib_list);
 378 }
 379
 380 static EGLBoolean
 381 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 382 {
 383    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 384    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 385
 386    (void) drv;
 387
 388    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 389
 390    if (dri2_dpy->dri2) {
 391       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 392    } else {
 393       assert(dri2_dpy->swrast);
 394       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 395    }
 396
 397    if (surf->Type == EGL_PBUFFER_BIT)
 398       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 399
 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(dri2_dpy->driver_name);
 709       free(connect);
 710       return EGL_FALSE;
 711    }
 712
 713 #ifdef HAVE_WAYLAND_PLATFORM
 714    dri2_dpy->device_name =
 715       strndup(device_name,
 716               xcb_dri2_connect_device_name_length(connect));
 717 #endif
 718
 719    free(connect);
 720
 721    return EGL_TRUE;
 722 }
 723
 724 static int
 725 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 726 {
 727    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 728
 729    return dri2_x11_do_authenticate(dri2_dpy, id);
 730 }
 731
 732 static EGLBoolean
 733 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 734                                  _EGLDisplay *disp, bool supports_preserved)
 735 {
 736    xcb_depth_iterator_t d;
 737    xcb_visualtype_t *visuals;
 738    int config_count = 0;
 739    EGLint surface_type;
 740
 741    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 742
 743    surface_type =
 744       EGL_WINDOW_BIT |
 745       EGL_PIXMAP_BIT |
 746       EGL_PBUFFER_BIT;
 747
 748    if (supports_preserved)
 749       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 750
 751    while (d.rem > 0) {
 752       EGLBoolean class_added[6] = { 0, };
 753
 754       visuals = xcb_depth_visuals(d.data);
 755
 756       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 757          if (class_added[visuals[i]._class])
 758             continue;
 759
 760          class_added[visuals[i]._class] = EGL_TRUE;
 761
 762          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 763             struct dri2_egl_config *dri2_conf;
 764             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 765
 766             const EGLint config_attrs[] = {
 767                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 768                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 769                     EGL_NONE
 770             };
 771
 772             unsigned int rgba_masks[4] = {
 773                visuals[i].red_mask,
 774                visuals[i].green_mask,
 775                visuals[i].blue_mask,
 776                0,
 777             };
 778
 779             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 780                                         surface_type, config_attrs,
 781                                         rgba_masks);
 782             if (dri2_conf)
 783                if (dri2_conf->base.ConfigID == config_count + 1)
 784                   config_count++;
 785
 786             /* Allow a 24-bit RGB visual 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) {
 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 32:
1053       format = __DRI_IMAGE_FORMAT_ARGB8888;
1054       break;
1055    default:
1056       _eglError(EGL_BAD_PARAMETER,
1057                 "dri2_create_image_khr: unsupported pixmap depth");
1058       free(buffers_reply);
1059       free(geometry_reply);
1060       return NULL;
1061    }
1062
1063    dri2_img = malloc(sizeof *dri2_img);
1064    if (!dri2_img) {
1065       free(buffers_reply);
1066       free(geometry_reply);
1067       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1068       return EGL_NO_IMAGE_KHR;
1069    }
1070
1071    _eglInitImage(&dri2_img->base, disp);
1072
1073    stride = buffers[0].pitch / buffers[0].cpp;
1074    dri2_img->dri_image =
1075       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1076                                            buffers_reply->width,
1077                                            buffers_reply->height,
1078                                            format,
1079                                            buffers[0].name,
1080                                            stride,
1081                                            dri2_img);
1082
1083    free(buffers_reply);
1084    free(geometry_reply);
1085
1086    return &dri2_img->base;
1087 }
1088
1089 static _EGLImage *
1090 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1091                           _EGLContext *ctx, EGLenum target,
1092                           EGLClientBuffer buffer, const EGLint *attr_list)
1093 {
1094    (void) drv;
1095
1096    switch (target) {
1097    case EGL_NATIVE_PIXMAP_KHR:
1098       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1099    default:
1100       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1101    }
1102 }
1103
1104 static EGLBoolean
1105 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1106                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1107                          EGLuint64KHR *sbc)
1108 {
1109    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1110    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1111    xcb_dri2_get_msc_cookie_t cookie;
1112    xcb_dri2_get_msc_reply_t *reply;
1113
1114    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1115    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1116
1117    if (!reply)
1118       return _eglError(EGL_BAD_ACCESS, __func__);
1119
1120    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1121    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1122    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1123    free(reply);
1124
1125    return EGL_TRUE;
1126 }
1127
1128 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1129    .authenticate = NULL,
1130    .create_window_surface = dri2_x11_create_window_surface,
1131    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1132    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1133    .destroy_surface = dri2_x11_destroy_surface,
1134    .create_image = dri2_create_image_khr,
1135    .swap_interval = dri2_fallback_swap_interval,
1136    .swap_buffers = dri2_x11_swap_buffers,
1137    .set_damage_region = dri2_fallback_set_damage_region,
1138    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1139    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1140    .copy_buffers = dri2_x11_copy_buffers,
1141    .query_buffer_age = dri2_fallback_query_buffer_age,
1142    .query_surface = dri2_query_surface,
1143    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1144    .get_sync_values = dri2_fallback_get_sync_values,
1145    .get_dri_drawable = dri2_surface_get_dri_drawable,
1146 };
1147
1148 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1149    .authenticate = dri2_x11_authenticate,
1150    .create_window_surface = dri2_x11_create_window_surface,
1151    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1152    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1153    .destroy_surface = dri2_x11_destroy_surface,
1154    .create_image = dri2_x11_create_image_khr,
1155    .swap_interval = dri2_x11_swap_interval,
1156    .swap_buffers = dri2_x11_swap_buffers,
1157    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1158    .swap_buffers_region = dri2_x11_swap_buffers_region,
1159    .set_damage_region = dri2_fallback_set_damage_region,
1160    .post_sub_buffer = dri2_x11_post_sub_buffer,
1161    .copy_buffers = dri2_x11_copy_buffers,
1162    .query_buffer_age = dri2_fallback_query_buffer_age,
1163    .query_surface = dri2_query_surface,
1164    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1165    .get_sync_values = dri2_x11_get_sync_values,
1166    .get_dri_drawable = dri2_surface_get_dri_drawable,
1167 };
1168
1169 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1170    .base = { __DRI_SWRAST_LOADER, 1 },
1171
1172    .getDrawableInfo = swrastGetDrawableInfo,
1173    .putImage        = swrastPutImage,
1174    .getImage        = swrastGetImage,
1175 };
1176
1177 static const __DRIextension *swrast_loader_extensions[] = {
1178    &swrast_loader_extension.base,
1179    &image_lookup_extension.base,
1180    NULL,
1181 };
1182
1183 static EGLBoolean
1184 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1185                         struct dri2_egl_display *dri2_dpy)
1186 {
1187    xcb_screen_iterator_t s;
1188    int screen = (uintptr_t)disp->Options.Platform;
1189    const char *msg;
1190
1191    disp->DriverData = (void *) dri2_dpy;
1192    if (disp->PlatformDisplay == NULL) {
1193       dri2_dpy->conn = xcb_connect(NULL, &screen);
1194       dri2_dpy->own_device = true;
1195    } else {
1196       Display *dpy = disp->PlatformDisplay;
1197
1198       dri2_dpy->conn = XGetXCBConnection(dpy);
1199       screen = DefaultScreen(dpy);
1200    }
1201
1202    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1203       msg = "xcb_connect failed";
1204       goto disconnect;
1205    }
1206
1207    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1208    dri2_dpy->screen = get_xcb_screen(s, screen);
1209    if (!dri2_dpy->screen) {
1210       msg = "failed to get xcb screen";
1211       goto disconnect;
1212    }
1213
1214    return EGL_TRUE;
1215 disconnect:
1216    if (disp->PlatformDisplay == NULL)
1217       xcb_disconnect(dri2_dpy->conn);
1218
1219    return _eglError(EGL_BAD_ALLOC, msg);
1220 }
1221
1222 static EGLBoolean
1223 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1224 {
1225    struct dri2_egl_display *dri2_dpy;
1226
1227    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1228    if (!dri2_dpy)
1229       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1230
1231    dri2_dpy->fd = -1;
1232    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1233       goto cleanup;
1234
1235    /*
1236     * Every hardware driver_name is set using strdup. Doing the same in
1237     * here will allow is to simply free the memory at dri2_terminate().
1238     */
1239    dri2_dpy->driver_name = strdup("swrast");
1240    if (!dri2_load_driver_swrast(disp))
1241       goto cleanup;
1242
1243    dri2_dpy->loader_extensions = swrast_loader_extensions;
1244
1245    if (!dri2_create_screen(disp))
1246       goto cleanup;
1247
1248    if (!dri2_setup_extensions(disp))
1249       goto cleanup;
1250
1251    dri2_setup_screen(disp);
1252
1253    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1254       goto cleanup;
1255
1256    /* Fill vtbl last to prevent accidentally calling virtual function during
1257     * initialization.
1258     */
1259    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1260
1261    return EGL_TRUE;
1262
1263  cleanup:
1264    dri2_display_destroy(disp);
1265    return EGL_FALSE;
1266 }
1267
1268 static void
1269 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1270 {
1271    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1272    int arbitrary_max_interval = 1000;
1273
1274    /* default behavior for no SwapBuffers support: no vblank syncing
1275     * either.
1276     */
1277    dri2_dpy->min_swap_interval = 0;
1278    dri2_dpy->max_swap_interval = 0;
1279
1280    if (!dri2_dpy->swap_available)
1281       return;
1282
1283    /* If we do have swapbuffers, then we can support pretty much any swap
1284     * interval.
1285     */
1286    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1287 }
1288
1289 #ifdef HAVE_DRI3
1290
1291 static const __DRIextension *dri3_image_loader_extensions[] = {
1292    &dri3_image_loader_extension.base,
1293    &image_lookup_extension.base,
1294    &use_invalidate.base,
1295    NULL,
1296 };
1297
1298 static EGLBoolean
1299 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1300 {
1301    struct dri2_egl_display *dri2_dpy;
1302
1303    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1304    if (!dri2_dpy)
1305       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1306
1307    dri2_dpy->fd = -1;
1308    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1309       goto cleanup;
1310
1311    if (!dri3_x11_connect(dri2_dpy))
1312       goto cleanup;
1313
1314    if (!dri2_load_driver_dri3(disp))
1315       goto cleanup;
1316
1317    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1318
1319    dri2_dpy->swap_available = true;
1320    dri2_dpy->invalidate_available = true;
1321
1322    if (!dri2_create_screen(disp))
1323       goto cleanup;
1324
1325    if (!dri2_setup_extensions(disp))
1326       goto cleanup;
1327
1328    dri2_setup_screen(disp);
1329
1330    dri2_x11_setup_swap_interval(disp);
1331
1332    if (!dri2_dpy->is_different_gpu)
1333       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1334    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1335    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1336    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1337
1338    dri2_set_WL_bind_wayland_display(drv, disp);
1339
1340    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1341       goto cleanup;
1342
1343    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1344    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1345    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1346    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1347    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1348    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1349
1350    /* Fill vtbl last to prevent accidentally calling virtual function during
1351     * initialization.
1352     */
1353    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1354
1355    _eglLog(_EGL_INFO, "Using DRI3");
1356
1357    return EGL_TRUE;
1358
1359  cleanup:
1360    dri2_display_destroy(disp);
1361    return EGL_FALSE;
1362 }
1363 #endif
1364
1365 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1366    .base = { __DRI_DRI2_LOADER, 2 },
1367
1368    .getBuffers           = dri2_x11_get_buffers,
1369    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1370    .getBuffersWithFormat = NULL,
1371 };
1372
1373 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1374    .base = { __DRI_DRI2_LOADER, 3 },
1375
1376    .getBuffers           = dri2_x11_get_buffers,
1377    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1378    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1379 };
1380
1381 static const __DRIextension *dri2_loader_extensions_old[] = {
1382    &dri2_loader_extension_old.base,
1383    &image_lookup_extension.base,
1384    &background_callable_extension.base,
1385    NULL,
1386 };
1387
1388 static const __DRIextension *dri2_loader_extensions[] = {
1389    &dri2_loader_extension.base,
1390    &image_lookup_extension.base,
1391    &background_callable_extension.base,
1392    NULL,
1393 };
1394
1395 static EGLBoolean
1396 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1397 {
1398    struct dri2_egl_display *dri2_dpy;
1399
1400    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1401    if (!dri2_dpy)
1402       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1403
1404    dri2_dpy->fd = -1;
1405    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1406       goto cleanup;
1407
1408    if (!dri2_x11_connect(dri2_dpy))
1409       goto cleanup;
1410
1411    if (!dri2_load_driver(disp))
1412       goto cleanup;
1413
1414    if (dri2_dpy->dri2_minor >= 1)
1415       dri2_dpy->loader_extensions = dri2_loader_extensions;
1416    else
1417       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1418
1419    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1420    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1421
1422    if (!dri2_create_screen(disp))
1423       goto cleanup;
1424
1425    if (!dri2_setup_extensions(disp))
1426       goto cleanup;
1427
1428    dri2_setup_screen(disp);
1429
1430    dri2_x11_setup_swap_interval(disp);
1431
1432    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1433    disp->Extensions.NOK_swap_region = EGL_TRUE;
1434    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1435    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1436    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1437
1438    dri2_set_WL_bind_wayland_display(drv, disp);
1439
1440    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1441       goto cleanup;
1442
1443    /* Fill vtbl last to prevent accidentally calling virtual function during
1444     * initialization.
1445     */
1446    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1447
1448    _eglLog(_EGL_INFO, "Using DRI2");
1449
1450    return EGL_TRUE;
1451
1452  cleanup:
1453    dri2_display_destroy(disp);
1454    return EGL_FALSE;
1455 }
1456
1457 EGLBoolean
1458 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1459 {
1460    EGLBoolean initialized = EGL_FALSE;
1461
1462    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1463 #ifdef HAVE_DRI3
1464       if (!getenv("LIBGL_DRI3_DISABLE"))
1465          initialized = dri2_initialize_x11_dri3(drv, disp);
1466 #endif
1467
1468       if (!initialized)
1469          initialized = dri2_initialize_x11_dri2(drv, disp);
1470    }
1471
1472    if (!initialized)
1473       initialized = dri2_initialize_x11_swrast(drv, disp);
1474
1475    return initialized;
1476 }
1477