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
  44 #include "egl_dri2.h"
  45 #include "egl_dri2_fallbacks.h"
  46 #include "loader.h"
  47
  48 #ifdef HAVE_DRI3
  49 #include "platform_x11_dri3.h"
  50 #endif
  51
  52 static EGLBoolean
  53 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  54                        EGLint interval);
  55
  56 static void
  57 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  58                      struct dri2_egl_surface * dri2_surf)
  59 {
  60    uint32_t           mask;
  61    const uint32_t     function = GXcopy;
  62    uint32_t           valgc[2];
  63
  64    /* create GC's */
  65    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  66    mask = XCB_GC_FUNCTION;
  67    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  68
  69    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  70    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  71    valgc[0] = function;
  72    valgc[1] = False;
  73    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  74    switch (dri2_surf->depth) {
  75       case 32:
  76       case 24:
  77          dri2_surf->bytes_per_pixel = 4;
  78          break;
  79       case 16:
  80          dri2_surf->bytes_per_pixel = 2;
  81          break;
  82       case 8:
  83          dri2_surf->bytes_per_pixel = 1;
  84          break;
  85       case 0:
  86          dri2_surf->bytes_per_pixel = 0;
  87          break;
  88       default:
  89          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  90    }
  91 }
  92
  93 static void
  94 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  95                       struct dri2_egl_surface * dri2_surf)
  96 {
  97    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
  99 }
 100
 101 static void
 102 swrastGetDrawableInfo(__DRIdrawable * draw,
 103                       int *x, int *y, int *w, int *h,
 104                       void *loaderPrivate)
 105 {
 106    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 107    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 108
 109    xcb_get_geometry_cookie_t cookie;
 110    xcb_get_geometry_reply_t *reply;
 111    xcb_generic_error_t *error;
 112
 113    *w = *h = 0;
 114    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 115    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 116    if (reply == NULL)
 117       return;
 118
 119    if (error != NULL) {
 120       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 121       free(error);
 122    } else {
 123       *w = reply->width;
 124       *h = reply->height;
 125    }
 126    free(reply);
 127 }
 128
 129 static void
 130 swrastPutImage(__DRIdrawable * draw, int op,
 131                int x, int y, int w, int h,
 132                char *data, void *loaderPrivate)
 133 {
 134    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 135    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 136
 137    xcb_gcontext_t gc;
 138
 139    switch (op) {
 140    case __DRI_SWRAST_IMAGE_OP_DRAW:
 141       gc = dri2_surf->gc;
 142       break;
 143    case __DRI_SWRAST_IMAGE_OP_SWAP:
 144       gc = dri2_surf->swapgc;
 145       break;
 146    default:
 147       return;
 148    }
 149
 150    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 151                  gc, w, h, x, y, 0, dri2_surf->depth,
 152                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 153 }
 154
 155 static void
 156 swrastGetImage(__DRIdrawable * read,
 157                int x, int y, int w, int h,
 158                char *data, void *loaderPrivate)
 159 {
 160    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 161    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 162
 163    xcb_get_image_cookie_t cookie;
 164    xcb_get_image_reply_t *reply;
 165    xcb_generic_error_t *error;
 166
 167    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 168                            dri2_surf->drawable, x, y, w, h, ~0);
 169    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 170    if (reply == NULL)
 171       return;
 172
 173    if (error != NULL) {
 174       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 175       free(error);
 176    } else {
 177       uint32_t bytes = xcb_get_image_data_length(reply);
 178       uint8_t *idata = xcb_get_image_data(reply);
 179       memcpy(data, idata, bytes);
 180    }
 181    free(reply);
 182 }
 183
 184
 185 static xcb_screen_t *
 186 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 187 {
 188     for (; iter.rem; --screen, xcb_screen_next(&iter))
 189         if (screen == 0)
 190             return iter.data;
 191
 192     return NULL;
 193 }
 194
 195
 196 /**
 197  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 198  */
 199 static _EGLSurface *
 200 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 201                         _EGLConfig *conf, void *native_surface,
 202                         const EGLint *attrib_list)
 203 {
 204    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 205    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 206    struct dri2_egl_surface *dri2_surf;
 207    xcb_get_geometry_cookie_t cookie;
 208    xcb_get_geometry_reply_t *reply;
 209    xcb_screen_iterator_t s;
 210    xcb_generic_error_t *error;
 211    xcb_drawable_t drawable;
 212    xcb_screen_t *screen;
 213    const __DRIconfig *config;
 214
 215    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 216    drawable = (uintptr_t) native_surface;
 217
 218    (void) drv;
 219
 220    dri2_surf = malloc(sizeof *dri2_surf);
 221    if (!dri2_surf) {
 222       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 223       return NULL;
 224    }
 225
 226    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 227       goto cleanup_surf;
 228
 229    dri2_surf->region = XCB_NONE;
 230    if (type == EGL_PBUFFER_BIT) {
 231       s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 232       screen = get_xcb_screen(s, dri2_dpy->screen);
 233       if (!screen) {
 234          _eglError(EGL_BAD_ALLOC, "failed to get xcb screen");
 235          goto cleanup_surf;
 236       }
 237
 238       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 239       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 240                        dri2_surf->drawable, screen->root,
 241                         dri2_surf->base.Width, dri2_surf->base.Height);
 242    } else {
 243       if (!drawable) {
 244          if (type == EGL_WINDOW_BIT)
 245             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 246          else
 247             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 248          goto cleanup_surf;
 249       }
 250       dri2_surf->drawable = drawable;
 251    }
 252
 253    config = dri2_get_dri_config(dri2_conf, type,
 254                                 dri2_surf->base.GLColorspace);
 255
 256    if (dri2_dpy->dri2) {
 257       dri2_surf->dri_drawable =
 258          (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 259                                               dri2_surf);
 260    } else {
 261       assert(dri2_dpy->swrast);
 262       dri2_surf->dri_drawable =
 263          (*dri2_dpy->swrast->createNewDrawable)(dri2_dpy->dri_screen, config,
 264                                                 dri2_surf);
 265    }
 266
 267    if (dri2_surf->dri_drawable == NULL) {
 268       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 269       goto cleanup_pixmap;
 270    }
 271
 272    if (type != EGL_PBUFFER_BIT) {
 273       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 274       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 275       if (error != NULL) {
 276          if (error->error_code == BadAlloc)
 277             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 278          else if (type == EGL_WINDOW_BIT)
 279             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 280          else
 281             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 282          free(error);
 283          goto cleanup_dri_drawable;
 284       } else if (reply == NULL) {
 285          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 286          goto cleanup_dri_drawable;
 287       }
 288
 289       dri2_surf->base.Width = reply->width;
 290       dri2_surf->base.Height = reply->height;
 291       dri2_surf->depth = reply->depth;
 292       free(reply);
 293    }
 294
 295    if (dri2_dpy->dri2) {
 296       xcb_void_cookie_t cookie;
 297       int conn_error;
 298
 299       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 300                                                 dri2_surf->drawable);
 301       error = xcb_request_check(dri2_dpy->conn, cookie);
 302       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 303       if (conn_error || error != NULL) {
 304          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 305             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 306          else if (type == EGL_WINDOW_BIT)
 307             _eglError(EGL_BAD_NATIVE_WINDOW,
 308                       "xcb_dri2_create_drawable_checked");
 309          else
 310             _eglError(EGL_BAD_NATIVE_PIXMAP,
 311                       "xcb_dri2_create_drawable_checked");
 312          free(error);
 313          goto cleanup_dri_drawable;
 314       }
 315    } else {
 316       if (type == EGL_PBUFFER_BIT) {
 317          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 318       }
 319       swrastCreateDrawable(dri2_dpy, dri2_surf);
 320    }
 321
 322    /* we always copy the back buffer to front */
 323    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 324
 325    return &dri2_surf->base;
 326
 327  cleanup_dri_drawable:
 328    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 329  cleanup_pixmap:
 330    if (type == EGL_PBUFFER_BIT)
 331       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 332  cleanup_surf:
 333    free(dri2_surf);
 334
 335    return NULL;
 336 }
 337
 338 /**
 339  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 340  */
 341 static _EGLSurface *
 342 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 343                                _EGLConfig *conf, void *native_window,
 344                                const EGLint *attrib_list)
 345 {
 346    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 347    _EGLSurface *surf;
 348
 349    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 350                                   native_window, attrib_list);
 351    if (surf != NULL) {
 352       /* When we first create the DRI2 drawable, its swap interval on the
 353        * server side is 1.
 354        */
 355       surf->SwapInterval = 1;
 356
 357       /* Override that with a driconf-set value. */
 358       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 359    }
 360
 361    return surf;
 362 }
 363
 364 static _EGLSurface *
 365 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 366                                _EGLConfig *conf, void *native_pixmap,
 367                                const EGLint *attrib_list)
 368 {
 369    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 370                                   native_pixmap, attrib_list);
 371 }
 372
 373 static _EGLSurface *
 374 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 375                                 _EGLConfig *conf, const EGLint *attrib_list)
 376 {
 377    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 378                                   XCB_WINDOW_NONE, attrib_list);
 379 }
 380
 381 static EGLBoolean
 382 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 383 {
 384    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 385    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 386
 387    (void) drv;
 388
 389    if (!_eglPutSurface(surf))
 390       return EGL_TRUE;
 391
 392    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 393
 394    if (dri2_dpy->dri2) {
 395       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 396    } else {
 397       assert(dri2_dpy->swrast);
 398       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 399    }
 400
 401    if (surf->Type == EGL_PBUFFER_BIT)
 402       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 403
 404    free(surf);
 405
 406    return EGL_TRUE;
 407 }
 408
 409 /**
 410  * Process list of buffer received from the server
 411  *
 412  * Processes the list of buffers received in a reply from the server to either
 413  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 414  */
 415 static void
 416 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 417                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 418 {
 419    struct dri2_egl_display *dri2_dpy =
 420       dri2_egl_display(dri2_surf->base.Resource.Display);
 421    xcb_rectangle_t rectangle;
 422    unsigned i;
 423
 424    dri2_surf->buffer_count = count;
 425    dri2_surf->have_fake_front = 0;
 426
 427    /* This assumes the DRI2 buffer attachment tokens matches the
 428     * __DRIbuffer tokens. */
 429    for (i = 0; i < count; i++) {
 430       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 431       dri2_surf->buffers[i].name = buffers[i].name;
 432       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 433       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 434       dri2_surf->buffers[i].flags = buffers[i].flags;
 435
 436       /* We only use the DRI drivers single buffer configs.  This
 437        * means that if we try to render to a window, DRI2 will give us
 438        * the fake front buffer, which we'll use as a back buffer.
 439        * Note that EGL doesn't require that several clients rendering
 440        * to the same window must see the same aux buffers. */
 441       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 442          dri2_surf->have_fake_front = 1;
 443    }
 444
 445    if (dri2_surf->region != XCB_NONE)
 446       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 447
 448    rectangle.x = 0;
 449    rectangle.y = 0;
 450    rectangle.width = dri2_surf->base.Width;
 451    rectangle.height = dri2_surf->base.Height;
 452    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 453    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 454 }
 455
 456 static __DRIbuffer *
 457 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 458                      int *width, int *height,
 459                      unsigned int *attachments, int count,
 460                      int *out_count, void *loaderPrivate)
 461 {
 462    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 463    struct dri2_egl_display *dri2_dpy =
 464       dri2_egl_display(dri2_surf->base.Resource.Display);
 465    xcb_dri2_dri2_buffer_t *buffers;
 466    xcb_dri2_get_buffers_reply_t *reply;
 467    xcb_dri2_get_buffers_cookie_t cookie;
 468
 469    (void) driDrawable;
 470
 471    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 472                                             dri2_surf->drawable,
 473                                             count, count, attachments);
 474    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 475    buffers = xcb_dri2_get_buffers_buffers (reply);
 476    if (buffers == NULL)
 477       return NULL;
 478
 479    *out_count = reply->count;
 480    dri2_surf->base.Width = *width = reply->width;
 481    dri2_surf->base.Height = *height = reply->height;
 482    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 483
 484    free(reply);
 485
 486    return dri2_surf->buffers;
 487 }
 488
 489 static __DRIbuffer *
 490 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 491                                  int *width, int *height,
 492                                  unsigned int *attachments, int count,
 493                                  int *out_count, void *loaderPrivate)
 494 {
 495    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 496    struct dri2_egl_display *dri2_dpy =
 497       dri2_egl_display(dri2_surf->base.Resource.Display);
 498    xcb_dri2_dri2_buffer_t *buffers;
 499    xcb_dri2_get_buffers_with_format_reply_t *reply;
 500    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 501    xcb_dri2_attach_format_t *format_attachments;
 502
 503    (void) driDrawable;
 504
 505    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 506    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 507                                                         dri2_surf->drawable,
 508                                                         count, count,
 509                                                         format_attachments);
 510
 511    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 512                                                    cookie, NULL);
 513    if (reply == NULL)
 514       return NULL;
 515
 516    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 517    dri2_surf->base.Width = *width = reply->width;
 518    dri2_surf->base.Height = *height = reply->height;
 519    *out_count = reply->count;
 520    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 521
 522    free(reply);
 523
 524    return dri2_surf->buffers;
 525 }
 526
 527 static void
 528 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 529 {
 530    (void) driDrawable;
 531
 532    /* FIXME: Does EGL support front buffer rendering at all? */
 533
 534 #if 0
 535    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 536
 537    dri2WaitGL(dri2_surf);
 538 #else
 539    (void) loaderPrivate;
 540 #endif
 541 }
 542
 543 static EGLBoolean
 544 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 545 {
 546    xcb_xfixes_query_version_reply_t *xfixes_query;
 547    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 548    xcb_dri2_query_version_reply_t *dri2_query;
 549    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 550    xcb_dri2_connect_reply_t *connect;
 551    xcb_dri2_connect_cookie_t connect_cookie;
 552    xcb_generic_error_t *error;
 553    xcb_screen_iterator_t s;
 554    xcb_screen_t *screen;
 555    char *driver_name, *loader_driver_name, *device_name;
 556    const xcb_query_extension_reply_t *extension;
 557
 558    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 559    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 560
 561    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 562    if (!(extension && extension->present))
 563       return EGL_FALSE;
 564
 565    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 566    if (!(extension && extension->present))
 567       return EGL_FALSE;
 568
 569    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 570                                                   XCB_XFIXES_MAJOR_VERSION,
 571                                                   XCB_XFIXES_MINOR_VERSION);
 572
 573    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 574                                                XCB_DRI2_MAJOR_VERSION,
 575                                                XCB_DRI2_MINOR_VERSION);
 576
 577    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 578    screen = get_xcb_screen(s, dri2_dpy->screen);
 579    if (!screen) {
 580       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 581       return EGL_FALSE;
 582    }
 583    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 584                                    XCB_DRI2_DRIVER_TYPE_DRI);
 585
 586    xfixes_query =
 587       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 588                                       xfixes_query_cookie, &error);
 589    if (xfixes_query == NULL ||
 590        error != NULL || xfixes_query->major_version < 2) {
 591       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 592       free(error);
 593       return EGL_FALSE;
 594    }
 595    free(xfixes_query);
 596
 597    dri2_query =
 598       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 599    if (dri2_query == NULL || error != NULL) {
 600       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 601       free(error);
 602       return EGL_FALSE;
 603    }
 604    dri2_dpy->dri2_major = dri2_query->major_version;
 605    dri2_dpy->dri2_minor = dri2_query->minor_version;
 606    free(dri2_query);
 607
 608    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 609    if (connect == NULL ||
 610        connect->driver_name_length + connect->device_name_length == 0) {
 611       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 612       return EGL_FALSE;
 613    }
 614
 615    device_name = xcb_dri2_connect_device_name (connect);
 616
 617    dri2_dpy->device_name =
 618       strndup(device_name,
 619               xcb_dri2_connect_device_name_length(connect));
 620
 621    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 622    if (dri2_dpy->fd == -1) {
 623       _eglLog(_EGL_WARNING,
 624               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
 625               strerror(errno));
 626       free(dri2_dpy->device_name);
 627       free(connect);
 628       return EGL_FALSE;
 629    }
 630
 631    driver_name = xcb_dri2_connect_driver_name (connect);
 632
 633    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 634     * Otherwise, default to the server's value.
 635     */
 636    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 637    if (loader_driver_name) {
 638       dri2_dpy->driver_name = loader_driver_name;
 639    } else {
 640       dri2_dpy->driver_name =
 641          strndup(driver_name,
 642                  xcb_dri2_connect_driver_name_length(connect));
 643    }
 644
 645    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 646       close(dri2_dpy->fd);
 647       free(dri2_dpy->device_name);
 648       free(dri2_dpy->driver_name);
 649       free(connect);
 650       return EGL_FALSE;
 651    }
 652    free(connect);
 653
 654    return EGL_TRUE;
 655 }
 656
 657 static int
 658 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 659 {
 660    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 661    xcb_dri2_authenticate_reply_t *authenticate;
 662    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 663    xcb_screen_iterator_t s;
 664    xcb_screen_t *screen;
 665    int ret = 0;
 666
 667    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 668
 669    screen = get_xcb_screen(s, dri2_dpy->screen);
 670    if (!screen) {
 671       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 672       return -1;
 673    }
 674
 675    authenticate_cookie =
 676       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 677    authenticate =
 678       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 679
 680    if (authenticate == NULL || !authenticate->authenticated)
 681       ret = -1;
 682
 683    free(authenticate);
 684
 685    return ret;
 686 }
 687
 688 static EGLBoolean
 689 dri2_x11_local_authenticate(_EGLDisplay *disp)
 690 {
 691 #ifdef HAVE_LIBDRM
 692    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 693    drm_magic_t magic;
 694
 695    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 696       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 697       return EGL_FALSE;
 698    }
 699
 700    if (dri2_x11_authenticate(disp, magic) < 0) {
 701       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 702       return EGL_FALSE;
 703    }
 704 #endif
 705    return EGL_TRUE;
 706 }
 707
 708 static EGLBoolean
 709 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 710                                  _EGLDisplay *disp, bool supports_preserved)
 711 {
 712    xcb_screen_iterator_t s;
 713    xcb_depth_iterator_t d;
 714    xcb_visualtype_t *visuals;
 715    int i, j, id;
 716    unsigned int rgba_masks[4];
 717    EGLint surface_type;
 718    EGLint config_attrs[] = {
 719            EGL_NATIVE_VISUAL_ID,   0,
 720            EGL_NATIVE_VISUAL_TYPE, 0,
 721            EGL_NONE
 722    };
 723
 724    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 725    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 726    id = 1;
 727
 728    surface_type =
 729       EGL_WINDOW_BIT |
 730       EGL_PIXMAP_BIT |
 731       EGL_PBUFFER_BIT;
 732
 733    if (supports_preserved)
 734       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 735
 736    while (d.rem > 0) {
 737       EGLBoolean class_added[6] = { 0, };
 738
 739       visuals = xcb_depth_visuals(d.data);
 740       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 741          if (class_added[visuals[i]._class])
 742             continue;
 743
 744          class_added[visuals[i]._class] = EGL_TRUE;
 745          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 746             config_attrs[1] = visuals[i].visual_id;
 747             config_attrs[3] = visuals[i]._class;
 748
 749             rgba_masks[0] = visuals[i].red_mask;
 750             rgba_masks[1] = visuals[i].green_mask;
 751             rgba_masks[2] = visuals[i].blue_mask;
 752             rgba_masks[3] = 0;
 753             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 754                             surface_type, config_attrs, rgba_masks);
 755
 756             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 757              * Otherwise it will only match a 32-bit RGBA visual.  On a
 758              * composited window manager on X11, this will make all of the
 759              * EGLConfigs with destination alpha get blended by the
 760              * compositor.  This is probably not what the application
 761              * wants... especially on drivers that only have 32-bit RGBA
 762              * EGLConfigs! */
 763             if (d.data->depth == 24) {
 764                rgba_masks[3] =
 765                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 766                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 767                                surface_type, config_attrs, rgba_masks);
 768             }
 769          }
 770       }
 771
 772       xcb_depth_next(&d);
 773    }
 774
 775    if (!_eglGetArraySize(disp->Configs)) {
 776       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 777       return EGL_FALSE;
 778    }
 779
 780    return EGL_TRUE;
 781 }
 782
 783 static EGLBoolean
 784 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 785                  _EGLSurface *draw, xcb_xfixes_region_t region)
 786 {
 787    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 788    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 789    enum xcb_dri2_attachment_t render_attachment;
 790    xcb_dri2_copy_region_cookie_t cookie;
 791
 792    /* No-op for a pixmap or pbuffer surface */
 793    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 794       return EGL_TRUE;
 795
 796    if (dri2_dpy->flush)
 797       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 798
 799    if (dri2_surf->have_fake_front)
 800       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 801    else
 802       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 803
 804    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 805                                            dri2_surf->drawable,
 806                                            region,
 807                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 808                                            render_attachment);
 809    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 810
 811    return EGL_TRUE;
 812 }
 813
 814 static int64_t
 815 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 816                           int64_t msc, int64_t divisor, int64_t remainder)
 817 {
 818    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 819    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 820    uint32_t msc_hi = msc >> 32;
 821    uint32_t msc_lo = msc & 0xffffffff;
 822    uint32_t divisor_hi = divisor >> 32;
 823    uint32_t divisor_lo = divisor & 0xffffffff;
 824    uint32_t remainder_hi = remainder >> 32;
 825    uint32_t remainder_lo = remainder & 0xffffffff;
 826    xcb_dri2_swap_buffers_cookie_t cookie;
 827    xcb_dri2_swap_buffers_reply_t *reply;
 828    int64_t swap_count = -1;
 829
 830    /* No-op for a pixmap or pbuffer surface */
 831    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 832       return 0;
 833
 834    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 835       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 836
 837    dri2_flush_drawable_for_swapbuffers(disp, draw);
 838
 839    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 840                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 841
 842    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 843
 844    if (reply) {
 845       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 846       free(reply);
 847    }
 848
 849    /* Since we aren't watching for the server's invalidate events like we're
 850     * supposed to (due to XCB providing no mechanism for filtering the events
 851     * the way xlib does), and SwapBuffers is a common cause of invalidate
 852     * events, just shove one down to the driver, even though we haven't told
 853     * the driver that we're the kind of loader that provides reliable
 854     * invalidate events.  This causes the driver to request buffers again at
 855     * its next draw, so that we get the correct buffers if a pageflip
 856     * happened.  The driver should still be using the viewport hack to catch
 857     * window resizes.
 858     */
 859    if (dri2_dpy->flush &&
 860        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 861       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 862
 863    return swap_count;
 864 }
 865
 866 static EGLBoolean
 867 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 868 {
 869    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 870    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 871
 872    if (dri2_dpy->dri2) {
 873       return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
 874    } else {
 875       assert(dri2_dpy->swrast);
 876
 877       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 878       return EGL_TRUE;
 879    }
 880 }
 881
 882 static EGLBoolean
 883 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 884                              _EGLSurface *draw,
 885                              EGLint numRects, const EGLint *rects)
 886 {
 887    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 888    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 889    EGLBoolean ret;
 890    xcb_xfixes_region_t region;
 891    xcb_rectangle_t rectangles[16];
 892    int i;
 893
 894    if (numRects > (int)ARRAY_SIZE(rectangles))
 895       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 896
 897    for (i = 0; i < numRects; i++) {
 898       rectangles[i].x = rects[i * 4];
 899       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 900       rectangles[i].width = rects[i * 4 + 2];
 901       rectangles[i].height = rects[i * 4 + 3];
 902    }
 903
 904    region = xcb_generate_id(dri2_dpy->conn);
 905    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 906    ret = dri2_copy_region(drv, disp, draw, region);
 907    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 908
 909    return ret;
 910 }
 911
 912 static EGLBoolean
 913 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 914                      EGLint x, EGLint y, EGLint width, EGLint height)
 915 {
 916    const EGLint rect[4] = { x, y, width, height };
 917
 918    if (x < 0 || y < 0 || width < 0 || height < 0)
 919       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 920
 921    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 922 }
 923
 924 static EGLBoolean
 925 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 926                        EGLint interval)
 927 {
 928    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 929    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 930
 931    if (interval > surf->Config->MaxSwapInterval)
 932       interval = surf->Config->MaxSwapInterval;
 933    else if (interval < surf->Config->MinSwapInterval)
 934       interval = surf->Config->MinSwapInterval;
 935
 936    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 937       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 938
 939    surf->SwapInterval = interval;
 940
 941    return EGL_TRUE;
 942 }
 943
 944 static EGLBoolean
 945 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 946                       void *native_pixmap_target)
 947 {
 948    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 949    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 950    xcb_gcontext_t gc;
 951    xcb_pixmap_t target;
 952
 953    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 954    target = (uintptr_t) native_pixmap_target;
 955
 956    (void) drv;
 957
 958    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 959
 960    gc = xcb_generate_id(dri2_dpy->conn);
 961    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 962    xcb_copy_area(dri2_dpy->conn,
 963                   dri2_surf->drawable,
 964                   target,
 965                   gc,
 966                   0, 0,
 967                   0, 0,
 968                   dri2_surf->base.Width,
 969                   dri2_surf->base.Height);
 970    xcb_free_gc(dri2_dpy->conn, gc);
 971
 972    return EGL_TRUE;
 973 }
 974
 975 static _EGLImage *
 976 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 977                              EGLClientBuffer buffer, const EGLint *attr_list)
 978 {
 979    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 980    struct dri2_egl_image *dri2_img;
 981    unsigned int attachments[1];
 982    xcb_drawable_t drawable;
 983    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 984    xcb_dri2_get_buffers_reply_t *buffers_reply;
 985    xcb_dri2_dri2_buffer_t *buffers;
 986    xcb_get_geometry_cookie_t geometry_cookie;
 987    xcb_get_geometry_reply_t *geometry_reply;
 988    xcb_generic_error_t *error;
 989    int stride, format;
 990
 991    (void) ctx;
 992
 993    drawable = (xcb_drawable_t) (uintptr_t) buffer;
 994    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
 995    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
 996    buffers_cookie =
 997       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 998                                       drawable, 1, 1, attachments);
 999    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1000    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1001                                                buffers_cookie, NULL);
1002    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1003    if (buffers == NULL) {
1004       return NULL;
1005    }
1006
1007    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1008                                             geometry_cookie, &error);
1009    if (geometry_reply == NULL || error != NULL) {
1010       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1011       free(error);
1012       free(buffers_reply);
1013       return NULL;
1014    }
1015
1016    switch (geometry_reply->depth) {
1017    case 16:
1018       format = __DRI_IMAGE_FORMAT_RGB565;
1019       break;
1020    case 24:
1021       format = __DRI_IMAGE_FORMAT_XRGB8888;
1022       break;
1023    case 32:
1024       format = __DRI_IMAGE_FORMAT_ARGB8888;
1025       break;
1026    default:
1027       _eglError(EGL_BAD_PARAMETER,
1028                 "dri2_create_image_khr: unsupported pixmap depth");
1029       free(buffers_reply);
1030       free(geometry_reply);
1031       return NULL;
1032    }
1033
1034    dri2_img = malloc(sizeof *dri2_img);
1035    if (!dri2_img) {
1036       free(buffers_reply);
1037       free(geometry_reply);
1038       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1039       return EGL_NO_IMAGE_KHR;
1040    }
1041
1042    if (!_eglInitImage(&dri2_img->base, disp)) {
1043       free(buffers_reply);
1044       free(geometry_reply);
1045       free(dri2_img);
1046       return EGL_NO_IMAGE_KHR;
1047    }
1048
1049    stride = buffers[0].pitch / buffers[0].cpp;
1050    dri2_img->dri_image =
1051       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1052                                            buffers_reply->width,
1053                                            buffers_reply->height,
1054                                            format,
1055                                            buffers[0].name,
1056                                            stride,
1057                                            dri2_img);
1058
1059    free(buffers_reply);
1060    free(geometry_reply);
1061
1062    return &dri2_img->base;
1063 }
1064
1065 static _EGLImage *
1066 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1067                           _EGLContext *ctx, EGLenum target,
1068                           EGLClientBuffer buffer, const EGLint *attr_list)
1069 {
1070    (void) drv;
1071
1072    switch (target) {
1073    case EGL_NATIVE_PIXMAP_KHR:
1074       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1075    default:
1076       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1077    }
1078 }
1079
1080 static EGLBoolean
1081 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1082                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1083                          EGLuint64KHR *sbc)
1084 {
1085    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1086    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1087    xcb_dri2_get_msc_cookie_t cookie;
1088    xcb_dri2_get_msc_reply_t *reply;
1089
1090    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1091    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1092
1093    if (!reply) {
1094       _eglError(EGL_BAD_ACCESS, __func__);
1095       return EGL_FALSE;
1096    }
1097
1098    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1099    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1100    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1101    free(reply);
1102
1103    return EGL_TRUE;
1104 }
1105
1106 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1107    .authenticate = NULL,
1108    .create_window_surface = dri2_x11_create_window_surface,
1109    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1110    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1111    .destroy_surface = dri2_x11_destroy_surface,
1112    .create_image = dri2_fallback_create_image_khr,
1113    .swap_interval = dri2_fallback_swap_interval,
1114    .swap_buffers = dri2_x11_swap_buffers,
1115    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1116    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1117    .copy_buffers = dri2_x11_copy_buffers,
1118    .query_buffer_age = dri2_fallback_query_buffer_age,
1119    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1120    .get_sync_values = dri2_fallback_get_sync_values,
1121    .get_dri_drawable = dri2_surface_get_dri_drawable,
1122 };
1123
1124 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1125    .authenticate = dri2_x11_authenticate,
1126    .create_window_surface = dri2_x11_create_window_surface,
1127    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1128    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1129    .destroy_surface = dri2_x11_destroy_surface,
1130    .create_image = dri2_x11_create_image_khr,
1131    .swap_interval = dri2_x11_swap_interval,
1132    .swap_buffers = dri2_x11_swap_buffers,
1133    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1134    .swap_buffers_region = dri2_x11_swap_buffers_region,
1135    .post_sub_buffer = dri2_x11_post_sub_buffer,
1136    .copy_buffers = dri2_x11_copy_buffers,
1137    .query_buffer_age = dri2_fallback_query_buffer_age,
1138    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1139    .get_sync_values = dri2_x11_get_sync_values,
1140    .get_dri_drawable = dri2_surface_get_dri_drawable,
1141 };
1142
1143 static EGLBoolean
1144 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1145 {
1146    struct dri2_egl_display *dri2_dpy;
1147
1148    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1149    if (!dri2_dpy)
1150       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1151
1152    disp->DriverData = (void *) dri2_dpy;
1153    if (disp->PlatformDisplay == NULL) {
1154       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1155       dri2_dpy->own_device = true;
1156    } else {
1157       Display *dpy = disp->PlatformDisplay;
1158
1159       dri2_dpy->conn = XGetXCBConnection(dpy);
1160       dri2_dpy->screen = DefaultScreen(dpy);
1161    }
1162
1163    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1164       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1165       goto cleanup_dpy;
1166    }
1167
1168    /*
1169     * Every hardware driver_name is set using strdup. Doing the same in
1170     * here will allow is to simply free the memory at dri2_terminate().
1171     */
1172    dri2_dpy->fd = -1;
1173    dri2_dpy->driver_name = strdup("swrast");
1174    if (!dri2_load_driver_swrast(disp))
1175       goto cleanup_conn;
1176
1177    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1178    dri2_dpy->swrast_loader_extension.base.version = 2;
1179    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1180    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1181    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1182
1183    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1184    dri2_dpy->extensions[1] = NULL;
1185    dri2_dpy->extensions[2] = NULL;
1186
1187    if (!dri2_create_screen(disp))
1188       goto cleanup_driver;
1189
1190    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1191       goto cleanup_configs;
1192
1193    /* Fill vtbl last to prevent accidentally calling virtual function during
1194     * initialization.
1195     */
1196    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1197
1198    return EGL_TRUE;
1199
1200  cleanup_configs:
1201    _eglCleanupDisplay(disp);
1202    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1203  cleanup_driver:
1204    dlclose(dri2_dpy->driver);
1205  cleanup_conn:
1206    free(dri2_dpy->driver_name);
1207    if (disp->PlatformDisplay == NULL)
1208       xcb_disconnect(dri2_dpy->conn);
1209  cleanup_dpy:
1210    free(dri2_dpy);
1211
1212    return EGL_FALSE;
1213 }
1214
1215 static void
1216 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1217 {
1218    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1219    int arbitrary_max_interval = 1000;
1220
1221    /* default behavior for no SwapBuffers support: no vblank syncing
1222     * either.
1223     */
1224    dri2_dpy->min_swap_interval = 0;
1225    dri2_dpy->max_swap_interval = 0;
1226
1227    if (!dri2_dpy->swap_available)
1228       return;
1229
1230    /* If we do have swapbuffers, then we can support pretty much any swap
1231     * interval, but we allow driconf to override applications.
1232     */
1233    if (dri2_dpy->config)
1234       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1235                                      "vblank_mode", &vblank_mode);
1236    switch (vblank_mode) {
1237    case DRI_CONF_VBLANK_NEVER:
1238       dri2_dpy->min_swap_interval = 0;
1239       dri2_dpy->max_swap_interval = 0;
1240       dri2_dpy->default_swap_interval = 0;
1241       break;
1242    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1243       dri2_dpy->min_swap_interval = 1;
1244       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1245       dri2_dpy->default_swap_interval = 1;
1246       break;
1247    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1248       dri2_dpy->min_swap_interval = 0;
1249       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1250       dri2_dpy->default_swap_interval = 0;
1251       break;
1252    default:
1253    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1254       dri2_dpy->min_swap_interval = 0;
1255       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1256       dri2_dpy->default_swap_interval = 1;
1257       break;
1258    }
1259 }
1260
1261 #ifdef HAVE_DRI3
1262 static EGLBoolean
1263 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1264 {
1265    struct dri2_egl_display *dri2_dpy;
1266
1267    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1268    if (!dri2_dpy)
1269       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1270
1271    disp->DriverData = (void *) dri2_dpy;
1272    if (disp->PlatformDisplay == NULL) {
1273       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1274       dri2_dpy->own_device = true;
1275    } else {
1276       Display *dpy = disp->PlatformDisplay;
1277
1278       dri2_dpy->conn = XGetXCBConnection(dpy);
1279       dri2_dpy->screen = DefaultScreen(dpy);
1280    }
1281
1282    if (xcb_connection_has_error(dri2_dpy->conn)) {
1283       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1284       goto cleanup_dpy;
1285    }
1286
1287    if (dri2_dpy->conn) {
1288       if (!dri3_x11_connect(dri2_dpy))
1289          goto cleanup_conn;
1290    }
1291
1292    if (!dri2_load_driver_dri3(disp))
1293       goto cleanup_conn;
1294
1295    dri2_dpy->extensions[0] = &dri3_image_loader_extension.base;
1296    dri2_dpy->extensions[1] = &use_invalidate.base;
1297    dri2_dpy->extensions[2] = &image_lookup_extension.base;
1298    dri2_dpy->extensions[3] = NULL;
1299
1300    dri2_dpy->swap_available = true;
1301    dri2_dpy->invalidate_available = true;
1302
1303    if (!dri2_create_screen(disp))
1304       goto cleanup_fd;
1305
1306    dri2_x11_setup_swap_interval(dri2_dpy);
1307
1308    if (!dri2_dpy->is_different_gpu)
1309       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1310    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1311    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1312    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1313
1314 #ifdef HAVE_WAYLAND_PLATFORM
1315    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1316 #endif
1317
1318    if (dri2_dpy->conn) {
1319       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1320          goto cleanup_configs;
1321    }
1322
1323    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1324    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1325    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1326    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1327    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1328    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1329
1330    /* Fill vtbl last to prevent accidentally calling virtual function during
1331     * initialization.
1332     */
1333    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1334
1335    return EGL_TRUE;
1336
1337  cleanup_configs:
1338    _eglCleanupDisplay(disp);
1339    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1340    dlclose(dri2_dpy->driver);
1341  cleanup_fd:
1342    close(dri2_dpy->fd);
1343  cleanup_conn:
1344    if (disp->PlatformDisplay == NULL)
1345       xcb_disconnect(dri2_dpy->conn);
1346  cleanup_dpy:
1347    free(dri2_dpy);
1348
1349    return EGL_FALSE;
1350 }
1351 #endif
1352
1353 static EGLBoolean
1354 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1355 {
1356    struct dri2_egl_display *dri2_dpy;
1357
1358    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1359    if (!dri2_dpy)
1360       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1361
1362    disp->DriverData = (void *) dri2_dpy;
1363    if (disp->PlatformDisplay == NULL) {
1364       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1365       dri2_dpy->own_device = true;
1366    } else {
1367       Display *dpy = disp->PlatformDisplay;
1368
1369       dri2_dpy->conn = XGetXCBConnection(dpy);
1370       dri2_dpy->screen = DefaultScreen(dpy);
1371    }
1372
1373    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1374       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1375       goto cleanup_dpy;
1376    }
1377
1378    if (!dri2_x11_connect(dri2_dpy))
1379       goto cleanup_conn;
1380
1381    if (!dri2_x11_local_authenticate(disp))
1382       goto cleanup_fd;
1383
1384    if (!dri2_load_driver(disp))
1385       goto cleanup_fd;
1386
1387    if (dri2_dpy->dri2_minor >= 1) {
1388       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1389       dri2_dpy->dri2_loader_extension.base.version = 3;
1390       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1391       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1392       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1393          dri2_x11_get_buffers_with_format;
1394    } else {
1395       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1396       dri2_dpy->dri2_loader_extension.base.version = 2;
1397       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1398       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1399       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1400    }
1401
1402    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1403    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1404    dri2_dpy->extensions[2] = NULL;
1405
1406    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1407    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1408
1409    if (!dri2_create_screen(disp))
1410       goto cleanup_driver;
1411
1412    dri2_x11_setup_swap_interval(dri2_dpy);
1413
1414    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1415    disp->Extensions.NOK_swap_region = EGL_TRUE;
1416    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1417    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1418    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1419
1420 #ifdef HAVE_WAYLAND_PLATFORM
1421    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1422 #endif
1423
1424    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1425       goto cleanup_configs;
1426
1427    /* Fill vtbl last to prevent accidentally calling virtual function during
1428     * initialization.
1429     */
1430    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1431
1432    return EGL_TRUE;
1433
1434  cleanup_configs:
1435    _eglCleanupDisplay(disp);
1436    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1437  cleanup_driver:
1438    dlclose(dri2_dpy->driver);
1439  cleanup_fd:
1440    close(dri2_dpy->fd);
1441  cleanup_conn:
1442    if (disp->PlatformDisplay == NULL)
1443       xcb_disconnect(dri2_dpy->conn);
1444  cleanup_dpy:
1445    free(dri2_dpy);
1446
1447    return EGL_FALSE;
1448 }
1449
1450 EGLBoolean
1451 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1452 {
1453    EGLBoolean initialized = EGL_TRUE;
1454
1455    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1456
1457    if (x11_dri2_accel) {
1458 #ifdef HAVE_DRI3
1459       if (getenv("LIBGL_DRI3_DISABLE") != NULL ||
1460           !dri2_initialize_x11_dri3(drv, disp)) {
1461 #endif
1462          if (!dri2_initialize_x11_dri2(drv, disp)) {
1463             initialized = dri2_initialize_x11_swrast(drv, disp);
1464          }
1465 #ifdef HAVE_DRI3
1466       }
1467 #endif
1468    } else {
1469       initialized = dri2_initialize_x11_swrast(drv, disp);
1470    }
1471
1472    return initialized;
1473 }
1474