src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/debug.h"
  44 #include "util/macros.h"
  45 #include "util/bitscan.h"
  46
  47 #include "egl_dri2.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 uint32_t
  59 dri2_format_for_depth(struct dri2_egl_display *dri2_dpy, uint32_t depth);
  60
  61 static void
  62 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  63                      struct dri2_egl_surface * dri2_surf)
  64 {
  65    uint32_t           mask;
  66    const uint32_t     function = GXcopy;
  67    uint32_t           valgc[2];
  68
  69    /* create GC's */
  70    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION;
  72    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  73
  74    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  75    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  76    valgc[0] = function;
  77    valgc[1] = False;
  78    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  79    switch (dri2_surf->depth) {
  80       case 32:
  81       case 30:
  82       case 24:
  83          dri2_surf->bytes_per_pixel = 4;
  84          break;
  85       case 16:
  86          dri2_surf->bytes_per_pixel = 2;
  87          break;
  88       case 8:
  89          dri2_surf->bytes_per_pixel = 1;
  90          break;
  91       case 0:
  92          dri2_surf->bytes_per_pixel = 0;
  93          break;
  94       default:
  95          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  96    }
  97 }
  98
  99 static void
 100 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
 101                       struct dri2_egl_surface * dri2_surf)
 102 {
 103    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 104    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 105 }
 106
 107 static bool
 108 x11_get_drawable_info(__DRIdrawable * draw,
 109                       int *x, int *y, int *w, int *h,
 110                       void *loaderPrivate)
 111 {
 112    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 113    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 114
 115    xcb_get_geometry_cookie_t cookie;
 116    xcb_get_geometry_reply_t *reply;
 117    xcb_generic_error_t *error;
 118    bool ret;
 119
 120    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 121    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 122    if (reply == NULL)
 123       return false;
 124
 125    if (error != NULL) {
 126       ret = false;
 127       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 128       free(error);
 129    } else {
 130       *x = reply->x;
 131       *y = reply->y;
 132       *w = reply->width;
 133       *h = reply->height;
 134       ret = true;
 135    }
 136    free(reply);
 137    return ret;
 138 }
 139
 140 static void
 141 swrastGetDrawableInfo(__DRIdrawable * draw,
 142                       int *x, int *y, int *w, int *h,
 143                       void *loaderPrivate)
 144 {
 145    *x = *y = *w = *h = 0;
 146    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 147 }
 148
 149 static void
 150 swrastPutImage(__DRIdrawable * draw, int op,
 151                int x, int y, int w, int h,
 152                char *data, void *loaderPrivate)
 153 {
 154    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 155    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 156
 157    xcb_gcontext_t gc;
 158
 159    switch (op) {
 160    case __DRI_SWRAST_IMAGE_OP_DRAW:
 161       gc = dri2_surf->gc;
 162       break;
 163    case __DRI_SWRAST_IMAGE_OP_SWAP:
 164       gc = dri2_surf->swapgc;
 165       break;
 166    default:
 167       return;
 168    }
 169
 170    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 171                  gc, w, h, x, y, 0, dri2_surf->depth,
 172                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 173 }
 174
 175 static void
 176 swrastGetImage(__DRIdrawable * read,
 177                int x, int y, int w, int h,
 178                char *data, void *loaderPrivate)
 179 {
 180    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 181    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 182
 183    xcb_get_image_cookie_t cookie;
 184    xcb_get_image_reply_t *reply;
 185    xcb_generic_error_t *error;
 186
 187    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 188                            dri2_surf->drawable, x, y, w, h, ~0);
 189    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 190    if (reply == NULL)
 191       return;
 192
 193    if (error != NULL) {
 194       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 195       free(error);
 196    } else {
 197       uint32_t bytes = xcb_get_image_data_length(reply);
 198       uint8_t *idata = xcb_get_image_data(reply);
 199       memcpy(data, idata, bytes);
 200    }
 201    free(reply);
 202 }
 203
 204
 205 static xcb_screen_t *
 206 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 207 {
 208     for (; iter.rem; --screen, xcb_screen_next(&iter))
 209         if (screen == 0)
 210             return iter.data;
 211
 212     return NULL;
 213 }
 214
 215 static xcb_visualtype_t *
 216 get_xcb_visualtype_for_depth(struct dri2_egl_display *dri2_dpy, int depth)
 217 {
 218    xcb_visualtype_iterator_t visual_iter;
 219    xcb_screen_t *screen = dri2_dpy->screen;
 220    xcb_depth_iterator_t depth_iter = xcb_screen_allowed_depths_iterator(screen);
 221
 222    for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
 223       if (depth_iter.data->depth != depth)
 224          continue;
 225
 226       visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
 227       if (visual_iter.rem)
 228          return visual_iter.data;
 229    }
 230
 231    return NULL;
 232 }
 233
 234 /* Get red channel mask for given depth. */
 235 unsigned int
 236 dri2_x11_get_red_mask_for_depth(struct dri2_egl_display *dri2_dpy, int depth)
 237 {
 238    xcb_visualtype_t *visual = get_xcb_visualtype_for_depth(dri2_dpy, depth);
 239
 240    if (visual)
 241       return visual->red_mask;
 242
 243    return 0;
 244 }
 245
 246 /**
 247  * Called via eglCreateWindowSurface(), drv->CreateWindowSurface().
 248  */
 249 static _EGLSurface *
 250 dri2_x11_create_surface(_EGLDisplay *disp, EGLint type, _EGLConfig *conf,
 251                         void *native_surface, const EGLint *attrib_list)
 252 {
 253    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 254    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 255    struct dri2_egl_surface *dri2_surf;
 256    xcb_get_geometry_cookie_t cookie;
 257    xcb_get_geometry_reply_t *reply;
 258    xcb_generic_error_t *error;
 259    const __DRIconfig *config;
 260
 261    dri2_surf = calloc(1, sizeof *dri2_surf);
 262    if (!dri2_surf) {
 263       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 264       return NULL;
 265    }
 266
 267    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list,
 268                           false, native_surface))
 269       goto cleanup_surf;
 270
 271    dri2_surf->region = XCB_NONE;
 272    if (type == EGL_PBUFFER_BIT) {
 273       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 274       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 275                        dri2_surf->drawable, dri2_dpy->screen->root,
 276                         dri2_surf->base.Width, dri2_surf->base.Height);
 277    } else {
 278       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 279       dri2_surf->drawable = (uintptr_t) native_surface;
 280    }
 281
 282    config = dri2_get_dri_config(dri2_conf, type,
 283                                 dri2_surf->base.GLColorspace);
 284
 285    if (!config) {
 286       _eglError(EGL_BAD_MATCH, "Unsupported surfacetype/colorspace configuration");
 287       goto cleanup_pixmap;
 288    }
 289
 290    if (!dri2_create_drawable(dri2_dpy, config, dri2_surf, dri2_surf))
 291       goto cleanup_pixmap;
 292
 293    if (type != EGL_PBUFFER_BIT) {
 294       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 295       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 296       if (error != NULL) {
 297          if (error->error_code == BadAlloc)
 298             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 299          else if (type == EGL_WINDOW_BIT)
 300             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 301          else
 302             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 303          free(error);
 304          goto cleanup_dri_drawable;
 305       } else if (reply == NULL) {
 306          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 307          goto cleanup_dri_drawable;
 308       }
 309
 310       dri2_surf->base.Width = reply->width;
 311       dri2_surf->base.Height = reply->height;
 312       dri2_surf->depth = reply->depth;
 313       free(reply);
 314    }
 315
 316    if (dri2_dpy->dri2) {
 317       xcb_void_cookie_t cookie;
 318       int conn_error;
 319
 320       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 321                                                 dri2_surf->drawable);
 322       error = xcb_request_check(dri2_dpy->conn, cookie);
 323       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 324       if (conn_error || error != NULL) {
 325          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 326             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 327          else if (type == EGL_WINDOW_BIT)
 328             _eglError(EGL_BAD_NATIVE_WINDOW,
 329                       "xcb_dri2_create_drawable_checked");
 330          else
 331             _eglError(EGL_BAD_NATIVE_PIXMAP,
 332                       "xcb_dri2_create_drawable_checked");
 333          free(error);
 334          goto cleanup_dri_drawable;
 335       }
 336    } else {
 337       if (type == EGL_PBUFFER_BIT) {
 338          dri2_surf->depth = conf->BufferSize;
 339       }
 340       swrastCreateDrawable(dri2_dpy, dri2_surf);
 341    }
 342
 343    /* we always copy the back buffer to front */
 344    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 345
 346    return &dri2_surf->base;
 347
 348  cleanup_dri_drawable:
 349    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 350  cleanup_pixmap:
 351    if (type == EGL_PBUFFER_BIT)
 352       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 353  cleanup_surf:
 354    free(dri2_surf);
 355
 356    return NULL;
 357 }
 358
 359 /**
 360  * Called via eglCreateWindowSurface(), drv->CreateWindowSurface().
 361  */
 362 static _EGLSurface *
 363 dri2_x11_create_window_surface(_EGLDisplay *disp, _EGLConfig *conf,
 364                                void *native_window, const EGLint *attrib_list)
 365 {
 366    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 367    _EGLSurface *surf;
 368
 369    surf = dri2_x11_create_surface(disp, EGL_WINDOW_BIT, conf,
 370                                   native_window, attrib_list);
 371    if (surf != NULL) {
 372       /* When we first create the DRI2 drawable, its swap interval on the
 373        * server side is 1.
 374        */
 375       surf->SwapInterval = 1;
 376
 377       /* Override that with a driconf-set value. */
 378       dri2_x11_swap_interval(disp->Driver, disp, surf, dri2_dpy->default_swap_interval);
 379    }
 380
 381    return surf;
 382 }
 383
 384 static _EGLSurface *
 385 dri2_x11_create_pixmap_surface(_EGLDisplay *disp, _EGLConfig *conf,
 386                                void *native_pixmap, const EGLint *attrib_list)
 387 {
 388    return dri2_x11_create_surface(disp, EGL_PIXMAP_BIT, conf,
 389                                   native_pixmap, attrib_list);
 390 }
 391
 392 static _EGLSurface *
 393 dri2_x11_create_pbuffer_surface(_EGLDisplay *disp, _EGLConfig *conf,
 394                                 const EGLint *attrib_list)
 395 {
 396    return dri2_x11_create_surface(disp, EGL_PBUFFER_BIT, conf,
 397                                   NULL, attrib_list);
 398 }
 399
 400 static EGLBoolean
 401 dri2_x11_destroy_surface(_EGLDisplay *disp, _EGLSurface *surf)
 402 {
 403    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 404    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 405
 406    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 407
 408    if (dri2_dpy->dri2) {
 409       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 410    } else {
 411       assert(dri2_dpy->swrast);
 412       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 413    }
 414
 415    if (surf->Type == EGL_PBUFFER_BIT)
 416       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 417
 418    dri2_fini_surface(surf);
 419    free(surf);
 420
 421    return EGL_TRUE;
 422 }
 423
 424 /**
 425  * Function utilizes swrastGetDrawableInfo to get surface
 426  * geometry from x server and calls default query surface
 427  * implementation that returns the updated values.
 428  *
 429  * In case of errors we still return values that we currently
 430  * have.
 431  */
 432 static EGLBoolean
 433 dri2_query_surface(const _EGLDriver *drv, _EGLDisplay *disp,
 434                    _EGLSurface *surf, EGLint attribute,
 435                    EGLint *value)
 436 {
 437    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 438    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 439    int x, y, w, h;
 440
 441    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 442
 443    switch (attribute) {
 444    case EGL_WIDTH:
 445    case EGL_HEIGHT:
 446       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 447          surf->Width = w;
 448          surf->Height = h;
 449       }
 450       break;
 451    default:
 452       break;
 453    }
 454    return _eglQuerySurface(drv, disp, surf, attribute, value);
 455 }
 456
 457 /**
 458  * Process list of buffer received from the server
 459  *
 460  * Processes the list of buffers received in a reply from the server to either
 461  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 462  */
 463 static void
 464 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 465                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 466 {
 467    struct dri2_egl_display *dri2_dpy =
 468       dri2_egl_display(dri2_surf->base.Resource.Display);
 469    xcb_rectangle_t rectangle;
 470
 471    dri2_surf->have_fake_front = false;
 472
 473    /* This assumes the DRI2 buffer attachment tokens matches the
 474     * __DRIbuffer tokens. */
 475    for (unsigned i = 0; i < count; i++) {
 476       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 477       dri2_surf->buffers[i].name = buffers[i].name;
 478       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 479       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 480       dri2_surf->buffers[i].flags = buffers[i].flags;
 481
 482       /* We only use the DRI drivers single buffer configs.  This
 483        * means that if we try to render to a window, DRI2 will give us
 484        * the fake front buffer, which we'll use as a back buffer.
 485        * Note that EGL doesn't require that several clients rendering
 486        * to the same window must see the same aux buffers. */
 487       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 488          dri2_surf->have_fake_front = true;
 489    }
 490
 491    if (dri2_surf->region != XCB_NONE)
 492       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 493
 494    rectangle.x = 0;
 495    rectangle.y = 0;
 496    rectangle.width = dri2_surf->base.Width;
 497    rectangle.height = dri2_surf->base.Height;
 498    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 499    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 500 }
 501
 502 static __DRIbuffer *
 503 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 504                      int *width, int *height,
 505                      unsigned int *attachments, int count,
 506                      int *out_count, void *loaderPrivate)
 507 {
 508    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 509    struct dri2_egl_display *dri2_dpy =
 510       dri2_egl_display(dri2_surf->base.Resource.Display);
 511    xcb_dri2_dri2_buffer_t *buffers;
 512    xcb_dri2_get_buffers_reply_t *reply;
 513    xcb_dri2_get_buffers_cookie_t cookie;
 514
 515    (void) driDrawable;
 516
 517    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 518                                             dri2_surf->drawable,
 519                                             count, count, attachments);
 520    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 521    if (reply == NULL)
 522       return NULL;
 523    buffers = xcb_dri2_get_buffers_buffers (reply);
 524    if (buffers == NULL)
 525       return NULL;
 526
 527    *out_count = reply->count;
 528    dri2_surf->base.Width = *width = reply->width;
 529    dri2_surf->base.Height = *height = reply->height;
 530    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 531
 532    free(reply);
 533
 534    return dri2_surf->buffers;
 535 }
 536
 537 static __DRIbuffer *
 538 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 539                                  int *width, int *height,
 540                                  unsigned int *attachments, int count,
 541                                  int *out_count, void *loaderPrivate)
 542 {
 543    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 544    struct dri2_egl_display *dri2_dpy =
 545       dri2_egl_display(dri2_surf->base.Resource.Display);
 546    xcb_dri2_dri2_buffer_t *buffers;
 547    xcb_dri2_get_buffers_with_format_reply_t *reply;
 548    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 549    xcb_dri2_attach_format_t *format_attachments;
 550
 551    (void) driDrawable;
 552
 553    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 554    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 555                                                         dri2_surf->drawable,
 556                                                         count, count,
 557                                                         format_attachments);
 558
 559    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 560                                                    cookie, NULL);
 561    if (reply == NULL)
 562       return NULL;
 563
 564    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 565    dri2_surf->base.Width = *width = reply->width;
 566    dri2_surf->base.Height = *height = reply->height;
 567    *out_count = reply->count;
 568    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 569
 570    free(reply);
 571
 572    return dri2_surf->buffers;
 573 }
 574
 575 static void
 576 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 577 {
 578    (void) driDrawable;
 579
 580    /* FIXME: Does EGL support front buffer rendering at all? */
 581
 582 #if 0
 583    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 584
 585    dri2WaitGL(dri2_surf);
 586 #else
 587    (void) loaderPrivate;
 588 #endif
 589 }
 590
 591 static int
 592 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 593 {
 594    xcb_dri2_authenticate_reply_t *authenticate;
 595    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 596    int ret = 0;
 597
 598    authenticate_cookie =
 599       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 600    authenticate =
 601       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 602
 603    if (authenticate == NULL || !authenticate->authenticated)
 604       ret = -1;
 605
 606    free(authenticate);
 607
 608    return ret;
 609 }
 610
 611 static EGLBoolean
 612 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 613 {
 614 #ifdef HAVE_LIBDRM
 615    drm_magic_t magic;
 616
 617    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 618       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 619       return EGL_FALSE;
 620    }
 621
 622    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 623       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 624       return EGL_FALSE;
 625    }
 626 #endif
 627    return EGL_TRUE;
 628 }
 629
 630 static EGLBoolean
 631 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 632 {
 633    xcb_xfixes_query_version_reply_t *xfixes_query;
 634    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 635    xcb_dri2_query_version_reply_t *dri2_query;
 636    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 637    xcb_dri2_connect_reply_t *connect;
 638    xcb_dri2_connect_cookie_t connect_cookie;
 639    xcb_generic_error_t *error;
 640    char *driver_name, *loader_driver_name, *device_name;
 641    const xcb_query_extension_reply_t *extension;
 642
 643    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 644    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 645
 646    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 647    if (!(extension && extension->present))
 648       return EGL_FALSE;
 649
 650    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 651    if (!(extension && extension->present))
 652       return EGL_FALSE;
 653
 654    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 655                                                   XCB_XFIXES_MAJOR_VERSION,
 656                                                   XCB_XFIXES_MINOR_VERSION);
 657
 658    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 659                                                XCB_DRI2_MAJOR_VERSION,
 660                                                XCB_DRI2_MINOR_VERSION);
 661
 662    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 663                                    XCB_DRI2_DRIVER_TYPE_DRI);
 664
 665    xfixes_query =
 666       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 667                                       xfixes_query_cookie, &error);
 668    if (xfixes_query == NULL ||
 669        error != NULL || xfixes_query->major_version < 2) {
 670       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 671       free(error);
 672       free(xfixes_query);
 673       return EGL_FALSE;
 674    }
 675    free(xfixes_query);
 676
 677    dri2_query =
 678       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 679    if (dri2_query == NULL || error != NULL) {
 680       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 681       free(error);
 682       return EGL_FALSE;
 683    }
 684    dri2_dpy->dri2_major = dri2_query->major_version;
 685    dri2_dpy->dri2_minor = dri2_query->minor_version;
 686    free(dri2_query);
 687
 688    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 689    if (connect == NULL ||
 690        connect->driver_name_length + connect->device_name_length == 0) {
 691       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 692       return EGL_FALSE;
 693    }
 694
 695    device_name = xcb_dri2_connect_device_name (connect);
 696
 697    dri2_dpy->fd = loader_open_device(device_name);
 698    if (dri2_dpy->fd == -1) {
 699       _eglLog(_EGL_WARNING,
 700               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 701       free(connect);
 702       return EGL_FALSE;
 703    }
 704
 705    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 706       close(dri2_dpy->fd);
 707       free(connect);
 708       return EGL_FALSE;
 709    }
 710
 711    driver_name = xcb_dri2_connect_driver_name (connect);
 712
 713    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 714     * Otherwise, default to the server's value.
 715     */
 716    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 717    if (loader_driver_name) {
 718       dri2_dpy->driver_name = loader_driver_name;
 719    } else {
 720       dri2_dpy->driver_name =
 721          strndup(driver_name,
 722                  xcb_dri2_connect_driver_name_length(connect));
 723    }
 724
 725    if (dri2_dpy->driver_name == NULL) {
 726       close(dri2_dpy->fd);
 727       free(connect);
 728       return EGL_FALSE;
 729    }
 730
 731 #ifdef HAVE_WAYLAND_PLATFORM
 732    dri2_dpy->device_name =
 733       strndup(device_name,
 734               xcb_dri2_connect_device_name_length(connect));
 735 #endif
 736
 737    free(connect);
 738
 739    return EGL_TRUE;
 740 }
 741
 742 static int
 743 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 744 {
 745    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 746
 747    return dri2_x11_do_authenticate(dri2_dpy, id);
 748 }
 749
 750 static EGLBoolean
 751 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 752                                  _EGLDisplay *disp, bool supports_preserved)
 753 {
 754    xcb_depth_iterator_t d;
 755    xcb_visualtype_t *visuals;
 756    int config_count = 0;
 757    EGLint surface_type;
 758
 759    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 760
 761    surface_type =
 762       EGL_WINDOW_BIT |
 763       EGL_PIXMAP_BIT |
 764       EGL_PBUFFER_BIT;
 765
 766    if (supports_preserved)
 767       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 768
 769    while (d.rem > 0) {
 770       EGLBoolean class_added[6] = { 0, };
 771
 772       visuals = xcb_depth_visuals(d.data);
 773
 774       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 775          if (class_added[visuals[i]._class])
 776             continue;
 777
 778          class_added[visuals[i]._class] = EGL_TRUE;
 779
 780          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 781             struct dri2_egl_config *dri2_conf;
 782             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 783
 784             const EGLint config_attrs[] = {
 785                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 786                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 787                     EGL_NONE
 788             };
 789
 790             int rgba_shifts[4] = {
 791                ffs(visuals[i].red_mask) - 1,
 792                ffs(visuals[i].green_mask) - 1,
 793                ffs(visuals[i].blue_mask) - 1,
 794                -1,
 795             };
 796
 797             unsigned int rgba_sizes[4] = {
 798                util_bitcount(visuals[i].red_mask),
 799                util_bitcount(visuals[i].green_mask),
 800                util_bitcount(visuals[i].blue_mask),
 801                0,
 802             };
 803
 804             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 805                                         surface_type, config_attrs,
 806                                         rgba_shifts, rgba_sizes);
 807             if (dri2_conf)
 808                if (dri2_conf->base.ConfigID == config_count + 1)
 809                   config_count++;
 810
 811             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 812              * Ditto for 30-bit RGB visuals to match a 32-bit RGBA EGLConfig.
 813              * Otherwise it will only match a 32-bit RGBA visual.  On a
 814              * composited window manager on X11, this will make all of the
 815              * EGLConfigs with destination alpha get blended by the
 816              * compositor.  This is probably not what the application
 817              * wants... especially on drivers that only have 32-bit RGBA
 818              * EGLConfigs! */
 819             if (d.data->depth == 24 || d.data->depth == 30) {
 820                unsigned int rgba_mask = ~(visuals[i].red_mask |
 821                                           visuals[i].green_mask |
 822                                           visuals[i].blue_mask);
 823                rgba_shifts[3] = ffs(rgba_mask) - 1;
 824                rgba_sizes[3] = util_bitcount(rgba_mask);
 825                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 826                                            surface_type, config_attrs,
 827                                            rgba_shifts, rgba_sizes);
 828                if (dri2_conf)
 829                   if (dri2_conf->base.ConfigID == config_count + 1)
 830                      config_count++;
 831             }
 832          }
 833       }
 834
 835       xcb_depth_next(&d);
 836    }
 837
 838    if (!config_count) {
 839       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 840       return EGL_FALSE;
 841    }
 842
 843    return EGL_TRUE;
 844 }
 845
 846 static EGLBoolean
 847 dri2_copy_region(const _EGLDriver *drv, _EGLDisplay *disp,
 848                  _EGLSurface *draw, xcb_xfixes_region_t region)
 849 {
 850    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 851    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 852    enum xcb_dri2_attachment_t render_attachment;
 853    xcb_dri2_copy_region_cookie_t cookie;
 854
 855    /* No-op for a pixmap or pbuffer surface */
 856    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 857       return EGL_TRUE;
 858
 859    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 860
 861    if (dri2_surf->have_fake_front)
 862       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 863    else
 864       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 865
 866    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 867                                            dri2_surf->drawable,
 868                                            region,
 869                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 870                                            render_attachment);
 871    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 872
 873    return EGL_TRUE;
 874 }
 875
 876 static int64_t
 877 dri2_x11_swap_buffers_msc(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 878                           int64_t msc, int64_t divisor, int64_t remainder)
 879 {
 880    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 881    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 882    uint32_t msc_hi = msc >> 32;
 883    uint32_t msc_lo = msc & 0xffffffff;
 884    uint32_t divisor_hi = divisor >> 32;
 885    uint32_t divisor_lo = divisor & 0xffffffff;
 886    uint32_t remainder_hi = remainder >> 32;
 887    uint32_t remainder_lo = remainder & 0xffffffff;
 888    xcb_dri2_swap_buffers_cookie_t cookie;
 889    xcb_dri2_swap_buffers_reply_t *reply;
 890    int64_t swap_count = -1;
 891
 892    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available) {
 893       swap_count = dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 894    } else {
 895       dri2_flush_drawable_for_swapbuffers(disp, draw);
 896
 897       cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn,
 898                                                dri2_surf->drawable, msc_hi,
 899                                                msc_lo, divisor_hi, divisor_lo,
 900                                                remainder_hi, remainder_lo);
 901
 902       reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 903
 904       if (reply) {
 905          swap_count = combine_u32_into_u64(reply->swap_hi, reply->swap_lo);
 906          free(reply);
 907       }
 908    }
 909
 910    /* Since we aren't watching for the server's invalidate events like we're
 911     * supposed to (due to XCB providing no mechanism for filtering the events
 912     * the way xlib does), and SwapBuffers is a common cause of invalidate
 913     * events, just shove one down to the driver, even though we haven't told
 914     * the driver that we're the kind of loader that provides reliable
 915     * invalidate events.  This causes the driver to request buffers again at
 916     * its next draw, so that we get the correct buffers if a pageflip
 917     * happened.  The driver should still be using the viewport hack to catch
 918     * window resizes.
 919     */
 920    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 921       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 922
 923    return swap_count;
 924 }
 925
 926 static EGLBoolean
 927 dri2_x11_swap_buffers(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 928 {
 929    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 930    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 931
 932    if (!dri2_dpy->flush) {
 933       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 934       return EGL_TRUE;
 935    }
 936
 937    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 938       /* Swap failed with a window drawable. */
 939       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 940    }
 941    return EGL_TRUE;
 942 }
 943
 944 static EGLBoolean
 945 dri2_x11_swap_buffers_region(const _EGLDriver *drv, _EGLDisplay *disp,
 946                              _EGLSurface *draw,
 947                              EGLint numRects, const EGLint *rects)
 948 {
 949    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 950    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 951    EGLBoolean ret;
 952    xcb_xfixes_region_t region;
 953    xcb_rectangle_t rectangles[16];
 954
 955    if (numRects > (int)ARRAY_SIZE(rectangles))
 956       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 957
 958    for (int i = 0; i < numRects; i++) {
 959       rectangles[i].x = rects[i * 4];
 960       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 961       rectangles[i].width = rects[i * 4 + 2];
 962       rectangles[i].height = rects[i * 4 + 3];
 963    }
 964
 965    region = xcb_generate_id(dri2_dpy->conn);
 966    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 967    ret = dri2_copy_region(drv, disp, draw, region);
 968    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 969
 970    return ret;
 971 }
 972
 973 static EGLBoolean
 974 dri2_x11_post_sub_buffer(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 975                      EGLint x, EGLint y, EGLint width, EGLint height)
 976 {
 977    const EGLint rect[4] = { x, y, width, height };
 978
 979    if (x < 0 || y < 0 || width < 0 || height < 0)
 980       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 981
 982    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 983 }
 984
 985 static EGLBoolean
 986 dri2_x11_swap_interval(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 987                        EGLint interval)
 988 {
 989    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 990    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 991
 992    if (dri2_dpy->swap_available)
 993       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 994
 995    return EGL_TRUE;
 996 }
 997
 998 static EGLBoolean
 999 dri2_x11_copy_buffers(const _EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
1000                       void *native_pixmap_target)
1001 {
1002    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1003    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
1004    xcb_gcontext_t gc;
1005    xcb_pixmap_t target;
1006
1007    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
1008    target = (uintptr_t) native_pixmap_target;
1009
1010    (void) drv;
1011
1012    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
1013
1014    gc = xcb_generate_id(dri2_dpy->conn);
1015    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
1016    xcb_copy_area(dri2_dpy->conn,
1017                   dri2_surf->drawable,
1018                   target,
1019                   gc,
1020                   0, 0,
1021                   0, 0,
1022                   dri2_surf->base.Width,
1023                   dri2_surf->base.Height);
1024    xcb_free_gc(dri2_dpy->conn, gc);
1025
1026    return EGL_TRUE;
1027 }
1028
1029 uint32_t
1030 dri2_format_for_depth(struct dri2_egl_display *dri2_dpy, uint32_t depth)
1031 {
1032    switch (depth) {
1033    case 16:
1034       return __DRI_IMAGE_FORMAT_RGB565;
1035    case 24:
1036       return __DRI_IMAGE_FORMAT_XRGB8888;
1037    case 30:
1038       /* Different preferred formats for different hw */
1039       if (dri2_x11_get_red_mask_for_depth(dri2_dpy, 30) == 0x3ff)
1040          return __DRI_IMAGE_FORMAT_XBGR2101010;
1041       else
1042          return __DRI_IMAGE_FORMAT_XRGB2101010;
1043    case 32:
1044       return __DRI_IMAGE_FORMAT_ARGB8888;
1045    default:
1046       return __DRI_IMAGE_FORMAT_NONE;
1047    }
1048 }
1049
1050 static _EGLImage *
1051 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1052                              EGLClientBuffer buffer, const EGLint *attr_list)
1053 {
1054    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1055    struct dri2_egl_image *dri2_img;
1056    unsigned int attachments[1];
1057    xcb_drawable_t drawable;
1058    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1059    xcb_dri2_get_buffers_reply_t *buffers_reply;
1060    xcb_dri2_dri2_buffer_t *buffers;
1061    xcb_get_geometry_cookie_t geometry_cookie;
1062    xcb_get_geometry_reply_t *geometry_reply;
1063    xcb_generic_error_t *error;
1064    int stride, format;
1065
1066    (void) ctx;
1067
1068    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1069    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1070    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1071    buffers_cookie =
1072       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1073                                       drawable, 1, 1, attachments);
1074    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1075    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1076                                                buffers_cookie, NULL);
1077    if (buffers_reply == NULL)
1078      return NULL;
1079
1080    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1081    if (buffers == NULL) {
1082       return NULL;
1083    }
1084
1085    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1086                                             geometry_cookie, &error);
1087    if (geometry_reply == NULL || error != NULL) {
1088       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1089       free(error);
1090       free(buffers_reply);
1091       return NULL;
1092    }
1093
1094    format = dri2_format_for_depth(dri2_dpy, geometry_reply->depth);
1095    if (format == __DRI_IMAGE_FORMAT_NONE) {
1096       _eglError(EGL_BAD_PARAMETER,
1097                 "dri2_create_image_khr: unsupported pixmap depth");
1098       free(buffers_reply);
1099       free(geometry_reply);
1100       return NULL;
1101    }
1102
1103    dri2_img = malloc(sizeof *dri2_img);
1104    if (!dri2_img) {
1105       free(buffers_reply);
1106       free(geometry_reply);
1107       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1108       return EGL_NO_IMAGE_KHR;
1109    }
1110
1111    _eglInitImage(&dri2_img->base, disp);
1112
1113    stride = buffers[0].pitch / buffers[0].cpp;
1114    dri2_img->dri_image =
1115       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1116                                            buffers_reply->width,
1117                                            buffers_reply->height,
1118                                            format,
1119                                            buffers[0].name,
1120                                            stride,
1121                                            dri2_img);
1122
1123    free(buffers_reply);
1124    free(geometry_reply);
1125
1126    return &dri2_img->base;
1127 }
1128
1129 static _EGLImage *
1130 dri2_x11_create_image_khr(const _EGLDriver *drv, _EGLDisplay *disp,
1131                           _EGLContext *ctx, EGLenum target,
1132                           EGLClientBuffer buffer, const EGLint *attr_list)
1133 {
1134    (void) drv;
1135
1136    switch (target) {
1137    case EGL_NATIVE_PIXMAP_KHR:
1138       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1139    default:
1140       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1141    }
1142 }
1143
1144 static EGLBoolean
1145 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1146                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1147                          EGLuint64KHR *sbc)
1148 {
1149    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1150    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1151    xcb_dri2_get_msc_cookie_t cookie;
1152    xcb_dri2_get_msc_reply_t *reply;
1153
1154    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1155    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1156
1157    if (!reply)
1158       return _eglError(EGL_BAD_ACCESS, __func__);
1159
1160    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1161    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1162    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1163    free(reply);
1164
1165    return EGL_TRUE;
1166 }
1167
1168 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1169    .authenticate = NULL,
1170    .create_window_surface = dri2_x11_create_window_surface,
1171    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1172    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1173    .destroy_surface = dri2_x11_destroy_surface,
1174    .create_image = dri2_create_image_khr,
1175    .swap_buffers = dri2_x11_swap_buffers,
1176    /* XXX: should really implement this since X11 has pixmaps */
1177    .query_surface = dri2_query_surface,
1178    .get_dri_drawable = dri2_surface_get_dri_drawable,
1179 };
1180
1181 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1182    .authenticate = dri2_x11_authenticate,
1183    .create_window_surface = dri2_x11_create_window_surface,
1184    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1185    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1186    .destroy_surface = dri2_x11_destroy_surface,
1187    .create_image = dri2_x11_create_image_khr,
1188    .swap_interval = dri2_x11_swap_interval,
1189    .swap_buffers = dri2_x11_swap_buffers,
1190    .swap_buffers_region = dri2_x11_swap_buffers_region,
1191    .post_sub_buffer = dri2_x11_post_sub_buffer,
1192    .copy_buffers = dri2_x11_copy_buffers,
1193    .query_surface = dri2_query_surface,
1194    .get_sync_values = dri2_x11_get_sync_values,
1195    .get_dri_drawable = dri2_surface_get_dri_drawable,
1196 };
1197
1198 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1199    .base = { __DRI_SWRAST_LOADER, 1 },
1200
1201    .getDrawableInfo = swrastGetDrawableInfo,
1202    .putImage        = swrastPutImage,
1203    .getImage        = swrastGetImage,
1204 };
1205
1206 static const __DRIextension *swrast_loader_extensions[] = {
1207    &swrast_loader_extension.base,
1208    &image_lookup_extension.base,
1209    NULL,
1210 };
1211
1212 static int
1213 dri2_find_screen_for_display(const _EGLDisplay *disp, int fallback_screen)
1214 {
1215    const EGLAttrib *attr;
1216
1217    for (attr = disp->Options.Attribs; attr; attr += 2) {
1218       if (attr[0] == EGL_PLATFORM_X11_SCREEN_EXT)
1219          return attr[1];
1220    }
1221
1222    return fallback_screen;
1223 }
1224
1225 static EGLBoolean
1226 dri2_get_xcb_connection(_EGLDisplay *disp,
1227                         struct dri2_egl_display *dri2_dpy)
1228 {
1229    xcb_screen_iterator_t s;
1230    int screen;
1231    const char *msg;
1232
1233    disp->DriverData = (void *) dri2_dpy;
1234    if (disp->PlatformDisplay == NULL) {
1235       dri2_dpy->conn = xcb_connect(NULL, &screen);
1236       dri2_dpy->own_device = true;
1237       screen = dri2_find_screen_for_display(disp, screen);
1238    } else {
1239       Display *dpy = disp->PlatformDisplay;
1240       dri2_dpy->conn = XGetXCBConnection(dpy);
1241       screen = DefaultScreen(dpy);
1242    }
1243
1244    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1245       msg = "xcb_connect failed";
1246       goto disconnect;
1247    }
1248
1249    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1250    dri2_dpy->screen = get_xcb_screen(s, screen);
1251    if (!dri2_dpy->screen) {
1252       msg = "failed to get xcb screen";
1253       goto disconnect;
1254    }
1255
1256    return EGL_TRUE;
1257 disconnect:
1258    if (disp->PlatformDisplay == NULL)
1259       xcb_disconnect(dri2_dpy->conn);
1260
1261    return _eglError(EGL_BAD_ALLOC, msg);
1262 }
1263
1264 static EGLBoolean
1265 dri2_initialize_x11_swrast(_EGLDisplay *disp)
1266 {
1267    _EGLDevice *dev;
1268    struct dri2_egl_display *dri2_dpy;
1269
1270    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1271    if (!dri2_dpy)
1272       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1273
1274    dri2_dpy->fd = -1;
1275    if (!dri2_get_xcb_connection(disp, dri2_dpy))
1276       goto cleanup;
1277
1278    dev = _eglAddDevice(dri2_dpy->fd, true);
1279    if (!dev) {
1280       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1281       goto cleanup;
1282    }
1283
1284    disp->Device = dev;
1285
1286    /*
1287     * Every hardware driver_name is set using strdup. Doing the same in
1288     * here will allow is to simply free the memory at dri2_terminate().
1289     */
1290    dri2_dpy->driver_name = strdup("swrast");
1291    if (!dri2_load_driver_swrast(disp))
1292       goto cleanup;
1293
1294    dri2_dpy->loader_extensions = swrast_loader_extensions;
1295
1296    if (!dri2_create_screen(disp))
1297       goto cleanup;
1298
1299    if (!dri2_setup_extensions(disp))
1300       goto cleanup;
1301
1302    dri2_setup_screen(disp);
1303
1304    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1305       goto cleanup;
1306
1307    /* Fill vtbl last to prevent accidentally calling virtual function during
1308     * initialization.
1309     */
1310    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1311
1312    return EGL_TRUE;
1313
1314  cleanup:
1315    dri2_display_destroy(disp);
1316    return EGL_FALSE;
1317 }
1318
1319 static void
1320 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1321 {
1322    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1323    int arbitrary_max_interval = 1000;
1324
1325    /* default behavior for no SwapBuffers support: no vblank syncing
1326     * either.
1327     */
1328    dri2_dpy->min_swap_interval = 0;
1329    dri2_dpy->max_swap_interval = 0;
1330    dri2_dpy->default_swap_interval = 0;
1331
1332    if (!dri2_dpy->swap_available)
1333       return;
1334
1335    /* If we do have swapbuffers, then we can support pretty much any swap
1336     * interval.
1337     */
1338    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1339 }
1340
1341 #ifdef HAVE_DRI3
1342
1343 static const __DRIextension *dri3_image_loader_extensions[] = {
1344    &dri3_image_loader_extension.base,
1345    &image_lookup_extension.base,
1346    &use_invalidate.base,
1347    &background_callable_extension.base,
1348    NULL,
1349 };
1350
1351 static EGLBoolean
1352 dri2_initialize_x11_dri3(_EGLDisplay *disp)
1353 {
1354    _EGLDevice *dev;
1355    struct dri2_egl_display *dri2_dpy;
1356
1357    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1358    if (!dri2_dpy)
1359       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1360
1361    dri2_dpy->fd = -1;
1362    if (!dri2_get_xcb_connection(disp, dri2_dpy))
1363       goto cleanup;
1364
1365    if (!dri3_x11_connect(dri2_dpy))
1366       goto cleanup;
1367
1368    dev = _eglAddDevice(dri2_dpy->fd, false);
1369    if (!dev) {
1370       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1371       goto cleanup;
1372    }
1373
1374    disp->Device = dev;
1375
1376    if (!dri2_load_driver_dri3(disp))
1377       goto cleanup;
1378
1379    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1380
1381    dri2_dpy->swap_available = true;
1382    dri2_dpy->invalidate_available = true;
1383
1384    if (!dri2_create_screen(disp))
1385       goto cleanup;
1386
1387    if (!dri2_setup_extensions(disp))
1388       goto cleanup;
1389
1390    dri2_setup_screen(disp);
1391
1392    dri2_x11_setup_swap_interval(disp);
1393
1394    if (!dri2_dpy->is_different_gpu)
1395       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1396    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1397    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1398    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1399
1400    dri2_set_WL_bind_wayland_display(disp);
1401
1402    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1403       goto cleanup;
1404
1405    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1406    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1407    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1408    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1409    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1410    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1411
1412    /* Fill vtbl last to prevent accidentally calling virtual function during
1413     * initialization.
1414     */
1415    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1416
1417    _eglLog(_EGL_INFO, "Using DRI3");
1418
1419    return EGL_TRUE;
1420
1421  cleanup:
1422    dri2_display_destroy(disp);
1423    return EGL_FALSE;
1424 }
1425 #endif
1426
1427 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1428    .base = { __DRI_DRI2_LOADER, 2 },
1429
1430    .getBuffers           = dri2_x11_get_buffers,
1431    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1432    .getBuffersWithFormat = NULL,
1433 };
1434
1435 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1436    .base = { __DRI_DRI2_LOADER, 3 },
1437
1438    .getBuffers           = dri2_x11_get_buffers,
1439    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1440    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1441 };
1442
1443 static const __DRIextension *dri2_loader_extensions_old[] = {
1444    &dri2_loader_extension_old.base,
1445    &image_lookup_extension.base,
1446    &background_callable_extension.base,
1447    NULL,
1448 };
1449
1450 static const __DRIextension *dri2_loader_extensions[] = {
1451    &dri2_loader_extension.base,
1452    &image_lookup_extension.base,
1453    &use_invalidate.base,
1454    &background_callable_extension.base,
1455    NULL,
1456 };
1457
1458 static EGLBoolean
1459 dri2_initialize_x11_dri2(_EGLDisplay *disp)
1460 {
1461    _EGLDevice *dev;
1462    struct dri2_egl_display *dri2_dpy;
1463
1464    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1465    if (!dri2_dpy)
1466       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1467
1468    dri2_dpy->fd = -1;
1469    if (!dri2_get_xcb_connection(disp, dri2_dpy))
1470       goto cleanup;
1471
1472    if (!dri2_x11_connect(dri2_dpy))
1473       goto cleanup;
1474
1475    dev = _eglAddDevice(dri2_dpy->fd, false);
1476    if (!dev) {
1477       _eglError(EGL_NOT_INITIALIZED, "DRI2: failed to find EGLDevice");
1478       goto cleanup;
1479    }
1480
1481    disp->Device = dev;
1482
1483    if (!dri2_load_driver(disp))
1484       goto cleanup;
1485
1486    if (dri2_dpy->dri2_minor >= 1)
1487       dri2_dpy->loader_extensions = dri2_loader_extensions;
1488    else
1489       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1490
1491    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1492    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1493
1494    if (!dri2_create_screen(disp))
1495       goto cleanup;
1496
1497    if (!dri2_setup_extensions(disp))
1498       goto cleanup;
1499
1500    dri2_setup_screen(disp);
1501
1502    dri2_x11_setup_swap_interval(disp);
1503
1504    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1505    disp->Extensions.NOK_swap_region = EGL_TRUE;
1506    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1507    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1508    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1509
1510    dri2_set_WL_bind_wayland_display(disp);
1511
1512    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1513       goto cleanup;
1514
1515    /* Fill vtbl last to prevent accidentally calling virtual function during
1516     * initialization.
1517     */
1518    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1519
1520    _eglLog(_EGL_INFO, "Using DRI2");
1521
1522    return EGL_TRUE;
1523
1524  cleanup:
1525    dri2_display_destroy(disp);
1526    return EGL_FALSE;
1527 }
1528
1529 EGLBoolean
1530 dri2_initialize_x11(_EGLDisplay *disp)
1531 {
1532    EGLBoolean initialized = EGL_FALSE;
1533
1534    if (!disp->Options.ForceSoftware) {
1535 #ifdef HAVE_DRI3
1536       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1537          initialized = dri2_initialize_x11_dri3(disp);
1538 #endif
1539
1540       if (!initialized)
1541          initialized = dri2_initialize_x11_dri2(disp);
1542    }
1543
1544    if (!initialized)
1545       initialized = dri2_initialize_x11_swrast(disp);
1546
1547    return initialized;
1548 }
1549
1550 void
1551 dri2_teardown_x11(struct dri2_egl_display *dri2_dpy)
1552 {
1553    if (dri2_dpy->own_device)
1554       xcb_disconnect(dri2_dpy->conn);
1555 }