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    if (reply == NULL)
 476       return NULL;
 477    buffers = xcb_dri2_get_buffers_buffers (reply);
 478    if (buffers == NULL)
 479       return NULL;
 480
 481    *out_count = reply->count;
 482    dri2_surf->base.Width = *width = reply->width;
 483    dri2_surf->base.Height = *height = reply->height;
 484    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 485
 486    free(reply);
 487
 488    return dri2_surf->buffers;
 489 }
 490
 491 static __DRIbuffer *
 492 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 493                                  int *width, int *height,
 494                                  unsigned int *attachments, int count,
 495                                  int *out_count, void *loaderPrivate)
 496 {
 497    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 498    struct dri2_egl_display *dri2_dpy =
 499       dri2_egl_display(dri2_surf->base.Resource.Display);
 500    xcb_dri2_dri2_buffer_t *buffers;
 501    xcb_dri2_get_buffers_with_format_reply_t *reply;
 502    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 503    xcb_dri2_attach_format_t *format_attachments;
 504
 505    (void) driDrawable;
 506
 507    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 508    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 509                                                         dri2_surf->drawable,
 510                                                         count, count,
 511                                                         format_attachments);
 512
 513    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 514                                                    cookie, NULL);
 515    if (reply == NULL)
 516       return NULL;
 517
 518    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 519    dri2_surf->base.Width = *width = reply->width;
 520    dri2_surf->base.Height = *height = reply->height;
 521    *out_count = reply->count;
 522    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 523
 524    free(reply);
 525
 526    return dri2_surf->buffers;
 527 }
 528
 529 static void
 530 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 531 {
 532    (void) driDrawable;
 533
 534    /* FIXME: Does EGL support front buffer rendering at all? */
 535
 536 #if 0
 537    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 538
 539    dri2WaitGL(dri2_surf);
 540 #else
 541    (void) loaderPrivate;
 542 #endif
 543 }
 544
 545 static EGLBoolean
 546 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 547 {
 548    xcb_xfixes_query_version_reply_t *xfixes_query;
 549    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 550    xcb_dri2_query_version_reply_t *dri2_query;
 551    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 552    xcb_dri2_connect_reply_t *connect;
 553    xcb_dri2_connect_cookie_t connect_cookie;
 554    xcb_generic_error_t *error;
 555    xcb_screen_iterator_t s;
 556    xcb_screen_t *screen;
 557    char *driver_name, *loader_driver_name, *device_name;
 558    const xcb_query_extension_reply_t *extension;
 559
 560    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 561    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 562
 563    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 564    if (!(extension && extension->present))
 565       return EGL_FALSE;
 566
 567    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 568    if (!(extension && extension->present))
 569       return EGL_FALSE;
 570
 571    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 572                                                   XCB_XFIXES_MAJOR_VERSION,
 573                                                   XCB_XFIXES_MINOR_VERSION);
 574
 575    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 576                                                XCB_DRI2_MAJOR_VERSION,
 577                                                XCB_DRI2_MINOR_VERSION);
 578
 579    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 580    screen = get_xcb_screen(s, dri2_dpy->screen);
 581    if (!screen) {
 582       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 583       return EGL_FALSE;
 584    }
 585    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
 586                                    XCB_DRI2_DRIVER_TYPE_DRI);
 587
 588    xfixes_query =
 589       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 590                                       xfixes_query_cookie, &error);
 591    if (xfixes_query == NULL ||
 592        error != NULL || xfixes_query->major_version < 2) {
 593       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 594       free(error);
 595       return EGL_FALSE;
 596    }
 597    free(xfixes_query);
 598
 599    dri2_query =
 600       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 601    if (dri2_query == NULL || error != NULL) {
 602       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 603       free(error);
 604       return EGL_FALSE;
 605    }
 606    dri2_dpy->dri2_major = dri2_query->major_version;
 607    dri2_dpy->dri2_minor = dri2_query->minor_version;
 608    free(dri2_query);
 609
 610    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 611    if (connect == NULL ||
 612        connect->driver_name_length + connect->device_name_length == 0) {
 613       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 614       return EGL_FALSE;
 615    }
 616
 617    device_name = xcb_dri2_connect_device_name (connect);
 618
 619    dri2_dpy->device_name =
 620       strndup(device_name,
 621               xcb_dri2_connect_device_name_length(connect));
 622
 623    dri2_dpy->fd = loader_open_device(dri2_dpy->device_name);
 624    if (dri2_dpy->fd == -1) {
 625       _eglLog(_EGL_WARNING,
 626               "DRI2: could not open %s (%s)", dri2_dpy->device_name,
 627               strerror(errno));
 628       free(dri2_dpy->device_name);
 629       free(connect);
 630       return EGL_FALSE;
 631    }
 632
 633    driver_name = xcb_dri2_connect_driver_name (connect);
 634
 635    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 636     * Otherwise, default to the server's value.
 637     */
 638    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 639    if (loader_driver_name) {
 640       dri2_dpy->driver_name = loader_driver_name;
 641    } else {
 642       dri2_dpy->driver_name =
 643          strndup(driver_name,
 644                  xcb_dri2_connect_driver_name_length(connect));
 645    }
 646
 647    if (dri2_dpy->device_name == NULL || dri2_dpy->driver_name == NULL) {
 648       close(dri2_dpy->fd);
 649       free(dri2_dpy->device_name);
 650       free(dri2_dpy->driver_name);
 651       free(connect);
 652       return EGL_FALSE;
 653    }
 654    free(connect);
 655
 656    return EGL_TRUE;
 657 }
 658
 659 static int
 660 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 661 {
 662    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 663    xcb_dri2_authenticate_reply_t *authenticate;
 664    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 665    xcb_screen_iterator_t s;
 666    xcb_screen_t *screen;
 667    int ret = 0;
 668
 669    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 670
 671    screen = get_xcb_screen(s, dri2_dpy->screen);
 672    if (!screen) {
 673       _eglLog(_EGL_WARNING, "DRI2: failed to get xcb screen");
 674       return -1;
 675    }
 676
 677    authenticate_cookie =
 678       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
 679    authenticate =
 680       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 681
 682    if (authenticate == NULL || !authenticate->authenticated)
 683       ret = -1;
 684
 685    free(authenticate);
 686
 687    return ret;
 688 }
 689
 690 static EGLBoolean
 691 dri2_x11_local_authenticate(_EGLDisplay *disp)
 692 {
 693 #ifdef HAVE_LIBDRM
 694    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 695    drm_magic_t magic;
 696
 697    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 698       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 699       return EGL_FALSE;
 700    }
 701
 702    if (dri2_x11_authenticate(disp, magic) < 0) {
 703       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 704       return EGL_FALSE;
 705    }
 706 #endif
 707    return EGL_TRUE;
 708 }
 709
 710 static EGLBoolean
 711 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 712                                  _EGLDisplay *disp, bool supports_preserved)
 713 {
 714    xcb_screen_iterator_t s;
 715    xcb_depth_iterator_t d;
 716    xcb_visualtype_t *visuals;
 717    int i, j, id;
 718    unsigned int rgba_masks[4];
 719    EGLint surface_type;
 720    EGLint config_attrs[] = {
 721            EGL_NATIVE_VISUAL_ID,   0,
 722            EGL_NATIVE_VISUAL_TYPE, 0,
 723            EGL_NONE
 724    };
 725
 726    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
 727    d = xcb_screen_allowed_depths_iterator(get_xcb_screen(s, dri2_dpy->screen));
 728    id = 1;
 729
 730    surface_type =
 731       EGL_WINDOW_BIT |
 732       EGL_PIXMAP_BIT |
 733       EGL_PBUFFER_BIT;
 734
 735    if (supports_preserved)
 736       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 737
 738    while (d.rem > 0) {
 739       EGLBoolean class_added[6] = { 0, };
 740
 741       visuals = xcb_depth_visuals(d.data);
 742       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 743          if (class_added[visuals[i]._class])
 744             continue;
 745
 746          class_added[visuals[i]._class] = EGL_TRUE;
 747          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 748             config_attrs[1] = visuals[i].visual_id;
 749             config_attrs[3] = visuals[i]._class;
 750
 751             rgba_masks[0] = visuals[i].red_mask;
 752             rgba_masks[1] = visuals[i].green_mask;
 753             rgba_masks[2] = visuals[i].blue_mask;
 754             rgba_masks[3] = 0;
 755             dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 756                             surface_type, config_attrs, rgba_masks);
 757
 758             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 759              * Otherwise it will only match a 32-bit RGBA visual.  On a
 760              * composited window manager on X11, this will make all of the
 761              * EGLConfigs with destination alpha get blended by the
 762              * compositor.  This is probably not what the application
 763              * wants... especially on drivers that only have 32-bit RGBA
 764              * EGLConfigs! */
 765             if (d.data->depth == 24) {
 766                rgba_masks[3] =
 767                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 768                dri2_add_config(disp, dri2_dpy->driver_configs[j], id++,
 769                                surface_type, config_attrs, rgba_masks);
 770             }
 771          }
 772       }
 773
 774       xcb_depth_next(&d);
 775    }
 776
 777    if (!_eglGetArraySize(disp->Configs)) {
 778       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 779       return EGL_FALSE;
 780    }
 781
 782    return EGL_TRUE;
 783 }
 784
 785 static EGLBoolean
 786 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 787                  _EGLSurface *draw, xcb_xfixes_region_t region)
 788 {
 789    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 790    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 791    enum xcb_dri2_attachment_t render_attachment;
 792    xcb_dri2_copy_region_cookie_t cookie;
 793
 794    /* No-op for a pixmap or pbuffer surface */
 795    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 796       return EGL_TRUE;
 797
 798    if (dri2_dpy->flush)
 799       (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 800
 801    if (dri2_surf->have_fake_front)
 802       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 803    else
 804       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 805
 806    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 807                                            dri2_surf->drawable,
 808                                            region,
 809                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 810                                            render_attachment);
 811    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 812
 813    return EGL_TRUE;
 814 }
 815
 816 static int64_t
 817 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 818                           int64_t msc, int64_t divisor, int64_t remainder)
 819 {
 820    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 821    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 822    uint32_t msc_hi = msc >> 32;
 823    uint32_t msc_lo = msc & 0xffffffff;
 824    uint32_t divisor_hi = divisor >> 32;
 825    uint32_t divisor_lo = divisor & 0xffffffff;
 826    uint32_t remainder_hi = remainder >> 32;
 827    uint32_t remainder_lo = remainder & 0xffffffff;
 828    xcb_dri2_swap_buffers_cookie_t cookie;
 829    xcb_dri2_swap_buffers_reply_t *reply;
 830    int64_t swap_count = -1;
 831
 832    /* No-op for a pixmap or pbuffer surface */
 833    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 834       return 0;
 835
 836    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 837       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 838
 839    dri2_flush_drawable_for_swapbuffers(disp, draw);
 840
 841    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 842                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 843
 844    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 845
 846    if (reply) {
 847       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 848       free(reply);
 849    }
 850
 851    /* Since we aren't watching for the server's invalidate events like we're
 852     * supposed to (due to XCB providing no mechanism for filtering the events
 853     * the way xlib does), and SwapBuffers is a common cause of invalidate
 854     * events, just shove one down to the driver, even though we haven't told
 855     * the driver that we're the kind of loader that provides reliable
 856     * invalidate events.  This causes the driver to request buffers again at
 857     * its next draw, so that we get the correct buffers if a pageflip
 858     * happened.  The driver should still be using the viewport hack to catch
 859     * window resizes.
 860     */
 861    if (dri2_dpy->flush &&
 862        dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 863       (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 864
 865    return swap_count;
 866 }
 867
 868 static EGLBoolean
 869 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 870 {
 871    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 872    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 873
 874    if (dri2_dpy->dri2) {
 875       if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1) {
 876           return EGL_TRUE;
 877       }
 878       /* Swap failed with a window drawable. */
 879       _eglError(EGL_BAD_NATIVE_WINDOW, __FUNCTION__);
 880       return EGL_FALSE;
 881    } else {
 882       assert(dri2_dpy->swrast);
 883
 884       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 885       return EGL_TRUE;
 886    }
 887 }
 888
 889 static EGLBoolean
 890 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 891                              _EGLSurface *draw,
 892                              EGLint numRects, const EGLint *rects)
 893 {
 894    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 895    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 896    EGLBoolean ret;
 897    xcb_xfixes_region_t region;
 898    xcb_rectangle_t rectangles[16];
 899    int i;
 900
 901    if (numRects > (int)ARRAY_SIZE(rectangles))
 902       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 903
 904    for (i = 0; i < numRects; i++) {
 905       rectangles[i].x = rects[i * 4];
 906       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 907       rectangles[i].width = rects[i * 4 + 2];
 908       rectangles[i].height = rects[i * 4 + 3];
 909    }
 910
 911    region = xcb_generate_id(dri2_dpy->conn);
 912    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 913    ret = dri2_copy_region(drv, disp, draw, region);
 914    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 915
 916    return ret;
 917 }
 918
 919 static EGLBoolean
 920 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 921                      EGLint x, EGLint y, EGLint width, EGLint height)
 922 {
 923    const EGLint rect[4] = { x, y, width, height };
 924
 925    if (x < 0 || y < 0 || width < 0 || height < 0)
 926       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 927
 928    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 929 }
 930
 931 static EGLBoolean
 932 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 933                        EGLint interval)
 934 {
 935    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 936    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 937
 938    if (interval > surf->Config->MaxSwapInterval)
 939       interval = surf->Config->MaxSwapInterval;
 940    else if (interval < surf->Config->MinSwapInterval)
 941       interval = surf->Config->MinSwapInterval;
 942
 943    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 944       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 945
 946    surf->SwapInterval = interval;
 947
 948    return EGL_TRUE;
 949 }
 950
 951 static EGLBoolean
 952 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 953                       void *native_pixmap_target)
 954 {
 955    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 956    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 957    xcb_gcontext_t gc;
 958    xcb_pixmap_t target;
 959
 960    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 961    target = (uintptr_t) native_pixmap_target;
 962
 963    (void) drv;
 964
 965    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 966
 967    gc = xcb_generate_id(dri2_dpy->conn);
 968    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 969    xcb_copy_area(dri2_dpy->conn,
 970                   dri2_surf->drawable,
 971                   target,
 972                   gc,
 973                   0, 0,
 974                   0, 0,
 975                   dri2_surf->base.Width,
 976                   dri2_surf->base.Height);
 977    xcb_free_gc(dri2_dpy->conn, gc);
 978
 979    return EGL_TRUE;
 980 }
 981
 982 static _EGLImage *
 983 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 984                              EGLClientBuffer buffer, const EGLint *attr_list)
 985 {
 986    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 987    struct dri2_egl_image *dri2_img;
 988    unsigned int attachments[1];
 989    xcb_drawable_t drawable;
 990    xcb_dri2_get_buffers_cookie_t buffers_cookie;
 991    xcb_dri2_get_buffers_reply_t *buffers_reply;
 992    xcb_dri2_dri2_buffer_t *buffers;
 993    xcb_get_geometry_cookie_t geometry_cookie;
 994    xcb_get_geometry_reply_t *geometry_reply;
 995    xcb_generic_error_t *error;
 996    int stride, format;
 997
 998    (void) ctx;
 999
1000    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1001    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1002    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1003    buffers_cookie =
1004       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1005                                       drawable, 1, 1, attachments);
1006    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1007    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1008                                                buffers_cookie, NULL);
1009    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1010    if (buffers == NULL) {
1011       return NULL;
1012    }
1013
1014    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1015                                             geometry_cookie, &error);
1016    if (geometry_reply == NULL || error != NULL) {
1017       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1018       free(error);
1019       free(buffers_reply);
1020       return NULL;
1021    }
1022
1023    switch (geometry_reply->depth) {
1024    case 16:
1025       format = __DRI_IMAGE_FORMAT_RGB565;
1026       break;
1027    case 24:
1028       format = __DRI_IMAGE_FORMAT_XRGB8888;
1029       break;
1030    case 32:
1031       format = __DRI_IMAGE_FORMAT_ARGB8888;
1032       break;
1033    default:
1034       _eglError(EGL_BAD_PARAMETER,
1035                 "dri2_create_image_khr: unsupported pixmap depth");
1036       free(buffers_reply);
1037       free(geometry_reply);
1038       return NULL;
1039    }
1040
1041    dri2_img = malloc(sizeof *dri2_img);
1042    if (!dri2_img) {
1043       free(buffers_reply);
1044       free(geometry_reply);
1045       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1046       return EGL_NO_IMAGE_KHR;
1047    }
1048
1049    if (!_eglInitImage(&dri2_img->base, disp)) {
1050       free(buffers_reply);
1051       free(geometry_reply);
1052       free(dri2_img);
1053       return EGL_NO_IMAGE_KHR;
1054    }
1055
1056    stride = buffers[0].pitch / buffers[0].cpp;
1057    dri2_img->dri_image =
1058       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1059                                            buffers_reply->width,
1060                                            buffers_reply->height,
1061                                            format,
1062                                            buffers[0].name,
1063                                            stride,
1064                                            dri2_img);
1065
1066    free(buffers_reply);
1067    free(geometry_reply);
1068
1069    return &dri2_img->base;
1070 }
1071
1072 static _EGLImage *
1073 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1074                           _EGLContext *ctx, EGLenum target,
1075                           EGLClientBuffer buffer, const EGLint *attr_list)
1076 {
1077    (void) drv;
1078
1079    switch (target) {
1080    case EGL_NATIVE_PIXMAP_KHR:
1081       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1082    default:
1083       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1084    }
1085 }
1086
1087 static EGLBoolean
1088 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1089                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1090                          EGLuint64KHR *sbc)
1091 {
1092    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1093    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1094    xcb_dri2_get_msc_cookie_t cookie;
1095    xcb_dri2_get_msc_reply_t *reply;
1096
1097    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1098    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1099
1100    if (!reply) {
1101       _eglError(EGL_BAD_ACCESS, __func__);
1102       return EGL_FALSE;
1103    }
1104
1105    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1106    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1107    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1108    free(reply);
1109
1110    return EGL_TRUE;
1111 }
1112
1113 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1114    .authenticate = NULL,
1115    .create_window_surface = dri2_x11_create_window_surface,
1116    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1117    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1118    .destroy_surface = dri2_x11_destroy_surface,
1119    .create_image = dri2_fallback_create_image_khr,
1120    .swap_interval = dri2_fallback_swap_interval,
1121    .swap_buffers = dri2_x11_swap_buffers,
1122    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1123    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1124    .copy_buffers = dri2_x11_copy_buffers,
1125    .query_buffer_age = dri2_fallback_query_buffer_age,
1126    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1127    .get_sync_values = dri2_fallback_get_sync_values,
1128    .get_dri_drawable = dri2_surface_get_dri_drawable,
1129 };
1130
1131 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1132    .authenticate = dri2_x11_authenticate,
1133    .create_window_surface = dri2_x11_create_window_surface,
1134    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1135    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1136    .destroy_surface = dri2_x11_destroy_surface,
1137    .create_image = dri2_x11_create_image_khr,
1138    .swap_interval = dri2_x11_swap_interval,
1139    .swap_buffers = dri2_x11_swap_buffers,
1140    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1141    .swap_buffers_region = dri2_x11_swap_buffers_region,
1142    .post_sub_buffer = dri2_x11_post_sub_buffer,
1143    .copy_buffers = dri2_x11_copy_buffers,
1144    .query_buffer_age = dri2_fallback_query_buffer_age,
1145    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1146    .get_sync_values = dri2_x11_get_sync_values,
1147    .get_dri_drawable = dri2_surface_get_dri_drawable,
1148 };
1149
1150 static EGLBoolean
1151 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1152 {
1153    struct dri2_egl_display *dri2_dpy;
1154
1155    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1156    if (!dri2_dpy)
1157       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1158
1159    disp->DriverData = (void *) dri2_dpy;
1160    if (disp->PlatformDisplay == NULL) {
1161       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1162       dri2_dpy->own_device = true;
1163    } else {
1164       Display *dpy = disp->PlatformDisplay;
1165
1166       dri2_dpy->conn = XGetXCBConnection(dpy);
1167       dri2_dpy->screen = DefaultScreen(dpy);
1168    }
1169
1170    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1171       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1172       goto cleanup_dpy;
1173    }
1174
1175    /*
1176     * Every hardware driver_name is set using strdup. Doing the same in
1177     * here will allow is to simply free the memory at dri2_terminate().
1178     */
1179    dri2_dpy->fd = -1;
1180    dri2_dpy->driver_name = strdup("swrast");
1181    if (!dri2_load_driver_swrast(disp))
1182       goto cleanup_conn;
1183
1184    dri2_dpy->swrast_loader_extension.base.name = __DRI_SWRAST_LOADER;
1185    dri2_dpy->swrast_loader_extension.base.version = 2;
1186    dri2_dpy->swrast_loader_extension.getDrawableInfo = swrastGetDrawableInfo;
1187    dri2_dpy->swrast_loader_extension.putImage = swrastPutImage;
1188    dri2_dpy->swrast_loader_extension.getImage = swrastGetImage;
1189
1190    dri2_dpy->extensions[0] = &dri2_dpy->swrast_loader_extension.base;
1191    dri2_dpy->extensions[1] = NULL;
1192    dri2_dpy->extensions[2] = NULL;
1193
1194    if (!dri2_create_screen(disp))
1195       goto cleanup_driver;
1196
1197    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1198       goto cleanup_configs;
1199
1200    /* Fill vtbl last to prevent accidentally calling virtual function during
1201     * initialization.
1202     */
1203    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1204
1205    return EGL_TRUE;
1206
1207  cleanup_configs:
1208    _eglCleanupDisplay(disp);
1209    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1210  cleanup_driver:
1211    dlclose(dri2_dpy->driver);
1212  cleanup_conn:
1213    free(dri2_dpy->driver_name);
1214    if (disp->PlatformDisplay == NULL)
1215       xcb_disconnect(dri2_dpy->conn);
1216  cleanup_dpy:
1217    free(dri2_dpy);
1218
1219    return EGL_FALSE;
1220 }
1221
1222 static void
1223 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1224 {
1225    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1226    int arbitrary_max_interval = 1000;
1227
1228    /* default behavior for no SwapBuffers support: no vblank syncing
1229     * either.
1230     */
1231    dri2_dpy->min_swap_interval = 0;
1232    dri2_dpy->max_swap_interval = 0;
1233
1234    if (!dri2_dpy->swap_available)
1235       return;
1236
1237    /* If we do have swapbuffers, then we can support pretty much any swap
1238     * interval, but we allow driconf to override applications.
1239     */
1240    if (dri2_dpy->config)
1241       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1242                                      "vblank_mode", &vblank_mode);
1243    switch (vblank_mode) {
1244    case DRI_CONF_VBLANK_NEVER:
1245       dri2_dpy->min_swap_interval = 0;
1246       dri2_dpy->max_swap_interval = 0;
1247       dri2_dpy->default_swap_interval = 0;
1248       break;
1249    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1250       dri2_dpy->min_swap_interval = 1;
1251       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1252       dri2_dpy->default_swap_interval = 1;
1253       break;
1254    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1255       dri2_dpy->min_swap_interval = 0;
1256       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1257       dri2_dpy->default_swap_interval = 0;
1258       break;
1259    default:
1260    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1261       dri2_dpy->min_swap_interval = 0;
1262       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1263       dri2_dpy->default_swap_interval = 1;
1264       break;
1265    }
1266 }
1267
1268 #ifdef HAVE_DRI3
1269 static EGLBoolean
1270 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1271 {
1272    struct dri2_egl_display *dri2_dpy;
1273
1274    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1275    if (!dri2_dpy)
1276       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1277
1278    disp->DriverData = (void *) dri2_dpy;
1279    if (disp->PlatformDisplay == NULL) {
1280       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1281       dri2_dpy->own_device = true;
1282    } else {
1283       Display *dpy = disp->PlatformDisplay;
1284
1285       dri2_dpy->conn = XGetXCBConnection(dpy);
1286       dri2_dpy->screen = DefaultScreen(dpy);
1287    }
1288
1289    if (xcb_connection_has_error(dri2_dpy->conn)) {
1290       _eglLog(_EGL_WARNING, "DRI3: xcb_connect failed");
1291       goto cleanup_dpy;
1292    }
1293
1294    if (dri2_dpy->conn) {
1295       if (!dri3_x11_connect(dri2_dpy))
1296          goto cleanup_conn;
1297    }
1298
1299    if (!dri2_load_driver_dri3(disp))
1300       goto cleanup_conn;
1301
1302    dri2_dpy->extensions[0] = &dri3_image_loader_extension.base;
1303    dri2_dpy->extensions[1] = &use_invalidate.base;
1304    dri2_dpy->extensions[2] = &image_lookup_extension.base;
1305    dri2_dpy->extensions[3] = NULL;
1306
1307    dri2_dpy->swap_available = true;
1308    dri2_dpy->invalidate_available = true;
1309
1310    if (!dri2_create_screen(disp))
1311       goto cleanup_fd;
1312
1313    dri2_x11_setup_swap_interval(dri2_dpy);
1314
1315    if (!dri2_dpy->is_different_gpu)
1316       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1317    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1318    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1319    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1320
1321 #ifdef HAVE_WAYLAND_PLATFORM
1322    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1323 #endif
1324
1325    if (dri2_dpy->conn) {
1326       if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1327          goto cleanup_configs;
1328    }
1329
1330    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1331    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1332    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1333    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1334    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1335    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1336
1337    /* Fill vtbl last to prevent accidentally calling virtual function during
1338     * initialization.
1339     */
1340    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1341
1342    _eglLog(_EGL_INFO, "Using DRI3");
1343
1344    return EGL_TRUE;
1345
1346  cleanup_configs:
1347    _eglCleanupDisplay(disp);
1348    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1349    dlclose(dri2_dpy->driver);
1350  cleanup_fd:
1351    close(dri2_dpy->fd);
1352  cleanup_conn:
1353    if (disp->PlatformDisplay == NULL)
1354       xcb_disconnect(dri2_dpy->conn);
1355  cleanup_dpy:
1356    free(dri2_dpy);
1357
1358    return EGL_FALSE;
1359 }
1360 #endif
1361
1362 static EGLBoolean
1363 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1364 {
1365    struct dri2_egl_display *dri2_dpy;
1366
1367    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1368    if (!dri2_dpy)
1369       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1370
1371    disp->DriverData = (void *) dri2_dpy;
1372    if (disp->PlatformDisplay == NULL) {
1373       dri2_dpy->conn = xcb_connect(0, &dri2_dpy->screen);
1374       dri2_dpy->own_device = true;
1375    } else {
1376       Display *dpy = disp->PlatformDisplay;
1377
1378       dri2_dpy->conn = XGetXCBConnection(dpy);
1379       dri2_dpy->screen = DefaultScreen(dpy);
1380    }
1381
1382    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1383       _eglLog(_EGL_WARNING, "DRI2: xcb_connect failed");
1384       goto cleanup_dpy;
1385    }
1386
1387    if (!dri2_x11_connect(dri2_dpy))
1388       goto cleanup_conn;
1389
1390    if (!dri2_x11_local_authenticate(disp))
1391       goto cleanup_fd;
1392
1393    if (!dri2_load_driver(disp))
1394       goto cleanup_fd;
1395
1396    if (dri2_dpy->dri2_minor >= 1) {
1397       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1398       dri2_dpy->dri2_loader_extension.base.version = 3;
1399       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1400       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1401       dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
1402          dri2_x11_get_buffers_with_format;
1403    } else {
1404       dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
1405       dri2_dpy->dri2_loader_extension.base.version = 2;
1406       dri2_dpy->dri2_loader_extension.getBuffers = dri2_x11_get_buffers;
1407       dri2_dpy->dri2_loader_extension.flushFrontBuffer = dri2_x11_flush_front_buffer;
1408       dri2_dpy->dri2_loader_extension.getBuffersWithFormat = NULL;
1409    }
1410
1411    dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
1412    dri2_dpy->extensions[1] = &image_lookup_extension.base;
1413    dri2_dpy->extensions[2] = NULL;
1414
1415    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1416    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1417
1418    if (!dri2_create_screen(disp))
1419       goto cleanup_driver;
1420
1421    dri2_x11_setup_swap_interval(dri2_dpy);
1422
1423    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1424    disp->Extensions.NOK_swap_region = EGL_TRUE;
1425    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1426    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1427    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1428
1429 #ifdef HAVE_WAYLAND_PLATFORM
1430    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
1431 #endif
1432
1433    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1434       goto cleanup_configs;
1435
1436    /* Fill vtbl last to prevent accidentally calling virtual function during
1437     * initialization.
1438     */
1439    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1440
1441    _eglLog(_EGL_INFO, "Using DRI2");
1442
1443    return EGL_TRUE;
1444
1445  cleanup_configs:
1446    _eglCleanupDisplay(disp);
1447    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
1448  cleanup_driver:
1449    dlclose(dri2_dpy->driver);
1450  cleanup_fd:
1451    close(dri2_dpy->fd);
1452  cleanup_conn:
1453    if (disp->PlatformDisplay == NULL)
1454       xcb_disconnect(dri2_dpy->conn);
1455  cleanup_dpy:
1456    free(dri2_dpy);
1457
1458    return EGL_FALSE;
1459 }
1460
1461 EGLBoolean
1462 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1463 {
1464    EGLBoolean initialized = EGL_TRUE;
1465
1466    int x11_dri2_accel = (getenv("LIBGL_ALWAYS_SOFTWARE") == NULL);
1467
1468    if (x11_dri2_accel) {
1469 #ifdef HAVE_DRI3
1470       if (getenv("LIBGL_DRI3_DISABLE") != NULL ||
1471           !dri2_initialize_x11_dri3(drv, disp)) {
1472 #endif
1473          if (!dri2_initialize_x11_dri2(drv, disp)) {
1474             initialized = dri2_initialize_x11_swrast(drv, disp);
1475          }
1476 #ifdef HAVE_DRI3
1477       }
1478 #endif
1479    } else {
1480       initialized = dri2_initialize_x11_swrast(drv, disp);
1481    }
1482
1483    return initialized;
1484 }
1485