src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/macros.h"
  44
  45 #include "egl_dri2.h"
  46 #include "egl_dri2_fallbacks.h"
  47 #include "loader.h"
  48
  49 #ifdef HAVE_DRI3
  50 #include "platform_x11_dri3.h"
  51 #endif
  52
  53 static EGLBoolean
  54 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  55                        EGLint interval);
  56
  57 static void
  58 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  59                      struct dri2_egl_surface * dri2_surf)
  60 {
  61    uint32_t           mask;
  62    const uint32_t     function = GXcopy;
  63    uint32_t           valgc[2];
  64
  65    /* create GC's */
  66    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  67    mask = XCB_GC_FUNCTION;
  68    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  69
  70    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  71    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  72    valgc[0] = function;
  73    valgc[1] = False;
  74    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  75    switch (dri2_surf->depth) {
  76       case 32:
  77       case 24:
  78          dri2_surf->bytes_per_pixel = 4;
  79          break;
  80       case 16:
  81          dri2_surf->bytes_per_pixel = 2;
  82          break;
  83       case 8:
  84          dri2_surf->bytes_per_pixel = 1;
  85          break;
  86       case 0:
  87          dri2_surf->bytes_per_pixel = 0;
  88          break;
  89       default:
  90          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  91    }
  92 }
  93
  94 static void
  95 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  96                       struct dri2_egl_surface * dri2_surf)
  97 {
  98    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
  99    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 100 }
 101
 102 static void
 103 swrastGetDrawableInfo(__DRIdrawable * draw,
 104                       int *x, int *y, int *w, int *h,
 105                       void *loaderPrivate)
 106 {
 107    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 108    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 109
 110    xcb_get_geometry_cookie_t cookie;
 111    xcb_get_geometry_reply_t *reply;
 112    xcb_generic_error_t *error;
 113
 114    *w = *h = 0;
 115    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 116    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 117    if (reply == NULL)
 118       return;
 119
 120    if (error != NULL) {
 121       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 122       free(error);
 123    } else {
 124       *w = reply->width;
 125       *h = reply->height;
 126    }
 127    free(reply);
 128 }
 129
 130 static void
 131 swrastPutImage(__DRIdrawable * draw, int op,
 132                int x, int y, int w, int h,
 133                char *data, void *loaderPrivate)
 134 {
 135    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 136    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 137
 138    xcb_gcontext_t gc;
 139
 140    switch (op) {
 141    case __DRI_SWRAST_IMAGE_OP_DRAW:
 142       gc = dri2_surf->gc;
 143       break;
 144    case __DRI_SWRAST_IMAGE_OP_SWAP:
 145       gc = dri2_surf->swapgc;
 146       break;
 147    default:
 148       return;
 149    }
 150
 151    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 152                  gc, w, h, x, y, 0, dri2_surf->depth,
 153                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 154 }
 155
 156 static void
 157 swrastGetImage(__DRIdrawable * read,
 158                int x, int y, int w, int h,
 159                char *data, void *loaderPrivate)
 160 {
 161    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 162    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 163
 164    xcb_get_image_cookie_t cookie;
 165    xcb_get_image_reply_t *reply;
 166    xcb_generic_error_t *error;
 167
 168    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 169                            dri2_surf->drawable, x, y, w, h, ~0);
 170    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 171    if (reply == NULL)
 172       return;
 173
 174    if (error != NULL) {
 175       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 176       free(error);
 177    } else {
 178       uint32_t bytes = xcb_get_image_data_length(reply);
 179       uint8_t *idata = xcb_get_image_data(reply);
 180       memcpy(data, idata, bytes);
 181    }
 182    free(reply);
 183 }
 184
 185
 186 static xcb_screen_t *
 187 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 188 {
 189     for (; iter.rem; --screen, xcb_screen_next(&iter))
 190         if (screen == 0)
 191             return iter.data;
 192
 193     return NULL;
 194 }
 195
 196
 197 /**
 198  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 199  */
 200 static _EGLSurface *
 201 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 202                         _EGLConfig *conf, void *native_surface,
 203                         const EGLint *attrib_list)
 204 {
 205    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 206    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 207    struct dri2_egl_surface *dri2_surf;
 208    xcb_get_geometry_cookie_t cookie;
 209    xcb_get_geometry_reply_t *reply;
 210    xcb_generic_error_t *error;
 211    xcb_drawable_t drawable;
 212    const __DRIconfig *config;
 213
 214    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 215    drawable = (uintptr_t) native_surface;
 216
 217    (void) drv;
 218
 219    dri2_surf = malloc(sizeof *dri2_surf);
 220    if (!dri2_surf) {
 221       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 222       return NULL;
 223    }
 224
 225    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 226       goto cleanup_surf;
 227
 228    dri2_surf->region = XCB_NONE;
 229    if (type == EGL_PBUFFER_BIT) {
 230       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 231       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 232                        dri2_surf->drawable, dri2_dpy->screen->root,
 233                         dri2_surf->base.Width, dri2_surf->base.Height);
 234    } else {
 235       if (!drawable) {
 236          if (type == EGL_WINDOW_BIT)
 237             _eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
 238          else
 239             _eglError(EGL_BAD_NATIVE_PIXMAP, "dri2_create_surface");
 240          goto cleanup_surf;
 241       }
 242       dri2_surf->drawable = drawable;
 243    }
 244
 245    config = dri2_get_dri_config(dri2_conf, type,
 246                                 dri2_surf->base.GLColorspace);
 247
 248    if (dri2_dpy->dri2) {
 249       dri2_surf->dri_drawable =
 250          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 251                                            dri2_surf);
 252    } else {
 253       assert(dri2_dpy->swrast);
 254       dri2_surf->dri_drawable =
 255          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 256                                              dri2_surf);
 257    }
 258
 259    if (dri2_surf->dri_drawable == NULL) {
 260       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 261       goto cleanup_pixmap;
 262    }
 263
 264    if (type != EGL_PBUFFER_BIT) {
 265       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 266       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 267       if (error != NULL) {
 268          if (error->error_code == BadAlloc)
 269             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 270          else if (type == EGL_WINDOW_BIT)
 271             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 272          else
 273             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 274          free(error);
 275          goto cleanup_dri_drawable;
 276       } else if (reply == NULL) {
 277          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 278          goto cleanup_dri_drawable;
 279       }
 280
 281       dri2_surf->base.Width = reply->width;
 282       dri2_surf->base.Height = reply->height;
 283       dri2_surf->depth = reply->depth;
 284       free(reply);
 285    }
 286
 287    if (dri2_dpy->dri2) {
 288       xcb_void_cookie_t cookie;
 289       int conn_error;
 290
 291       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 292                                                 dri2_surf->drawable);
 293       error = xcb_request_check(dri2_dpy->conn, cookie);
 294       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 295       if (conn_error || error != NULL) {
 296          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 297             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 298          else if (type == EGL_WINDOW_BIT)
 299             _eglError(EGL_BAD_NATIVE_WINDOW,
 300                       "xcb_dri2_create_drawable_checked");
 301          else
 302             _eglError(EGL_BAD_NATIVE_PIXMAP,
 303                       "xcb_dri2_create_drawable_checked");
 304          free(error);
 305          goto cleanup_dri_drawable;
 306       }
 307    } else {
 308       if (type == EGL_PBUFFER_BIT) {
 309          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 310       }
 311       swrastCreateDrawable(dri2_dpy, dri2_surf);
 312    }
 313
 314    /* we always copy the back buffer to front */
 315    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 316
 317    return &dri2_surf->base;
 318
 319  cleanup_dri_drawable:
 320    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 321  cleanup_pixmap:
 322    if (type == EGL_PBUFFER_BIT)
 323       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 324  cleanup_surf:
 325    free(dri2_surf);
 326
 327    return NULL;
 328 }
 329
 330 /**
 331  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 332  */
 333 static _EGLSurface *
 334 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 335                                _EGLConfig *conf, void *native_window,
 336                                const EGLint *attrib_list)
 337 {
 338    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 339    _EGLSurface *surf;
 340
 341    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 342                                   native_window, attrib_list);
 343    if (surf != NULL) {
 344       /* When we first create the DRI2 drawable, its swap interval on the
 345        * server side is 1.
 346        */
 347       surf->SwapInterval = 1;
 348
 349       /* Override that with a driconf-set value. */
 350       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 351    }
 352
 353    return surf;
 354 }
 355
 356 static _EGLSurface *
 357 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 358                                _EGLConfig *conf, void *native_pixmap,
 359                                const EGLint *attrib_list)
 360 {
 361    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 362                                   native_pixmap, attrib_list);
 363 }
 364
 365 static _EGLSurface *
 366 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 367                                 _EGLConfig *conf, const EGLint *attrib_list)
 368 {
 369    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 370                                   XCB_WINDOW_NONE, attrib_list);
 371 }
 372
 373 static EGLBoolean
 374 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 375 {
 376    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 377    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 378
 379    (void) drv;
 380
 381    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 382
 383    if (dri2_dpy->dri2) {
 384       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 385    } else {
 386       assert(dri2_dpy->swrast);
 387       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 388    }
 389
 390    if (surf->Type == EGL_PBUFFER_BIT)
 391       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 392
 393    free(surf);
 394
 395    return EGL_TRUE;
 396 }
 397
 398 /**
 399  * Function utilizes swrastGetDrawableInfo to get surface
 400  * geometry from x server and calls default query surface
 401  * implementation that returns the updated values.
 402  *
 403  * In case of errors we still return values that we currently
 404  * have.
 405  */
 406 static EGLBoolean
 407 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 408                    _EGLSurface *surf, EGLint attribute,
 409                    EGLint *value)
 410 {
 411    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 412    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 413    int x, y, w = -1, h = -1;
 414
 415    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 416
 417    switch (attribute) {
 418    case EGL_WIDTH:
 419    case EGL_HEIGHT:
 420       swrastGetDrawableInfo(drawable, &x, &y, &w, &h, dri2_surf);
 421       if (w != -1 && h != -1) {
 422          surf->Width = w;
 423          surf->Height = h;
 424       }
 425       break;
 426    default:
 427       break;
 428    }
 429    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 430 }
 431
 432 /**
 433  * Process list of buffer received from the server
 434  *
 435  * Processes the list of buffers received in a reply from the server to either
 436  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 437  */
 438 static void
 439 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 440                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 441 {
 442    struct dri2_egl_display *dri2_dpy =
 443       dri2_egl_display(dri2_surf->base.Resource.Display);
 444    xcb_rectangle_t rectangle;
 445    unsigned i;
 446
 447    dri2_surf->buffer_count = count;
 448    dri2_surf->have_fake_front = 0;
 449
 450    /* This assumes the DRI2 buffer attachment tokens matches the
 451     * __DRIbuffer tokens. */
 452    for (i = 0; i < count; i++) {
 453       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 454       dri2_surf->buffers[i].name = buffers[i].name;
 455       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 456       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 457       dri2_surf->buffers[i].flags = buffers[i].flags;
 458
 459       /* We only use the DRI drivers single buffer configs.  This
 460        * means that if we try to render to a window, DRI2 will give us
 461        * the fake front buffer, which we'll use as a back buffer.
 462        * Note that EGL doesn't require that several clients rendering
 463        * to the same window must see the same aux buffers. */
 464       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 465          dri2_surf->have_fake_front = 1;
 466    }
 467
 468    if (dri2_surf->region != XCB_NONE)
 469       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 470
 471    rectangle.x = 0;
 472    rectangle.y = 0;
 473    rectangle.width = dri2_surf->base.Width;
 474    rectangle.height = dri2_surf->base.Height;
 475    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 476    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 477 }
 478
 479 static __DRIbuffer *
 480 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 481                      int *width, int *height,
 482                      unsigned int *attachments, int count,
 483                      int *out_count, void *loaderPrivate)
 484 {
 485    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 486    struct dri2_egl_display *dri2_dpy =
 487       dri2_egl_display(dri2_surf->base.Resource.Display);
 488    xcb_dri2_dri2_buffer_t *buffers;
 489    xcb_dri2_get_buffers_reply_t *reply;
 490    xcb_dri2_get_buffers_cookie_t cookie;
 491
 492    (void) driDrawable;
 493
 494    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 495                                             dri2_surf->drawable,
 496                                             count, count, attachments);
 497    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 498    if (reply == NULL)
 499       return NULL;
 500    buffers = xcb_dri2_get_buffers_buffers (reply);
 501    if (buffers == NULL)
 502       return NULL;
 503
 504    *out_count = reply->count;
 505    dri2_surf->base.Width = *width = reply->width;
 506    dri2_surf->base.Height = *height = reply->height;
 507    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 508
 509    free(reply);
 510
 511    return dri2_surf->buffers;
 512 }
 513
 514 static __DRIbuffer *
 515 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 516                                  int *width, int *height,
 517                                  unsigned int *attachments, int count,
 518                                  int *out_count, void *loaderPrivate)
 519 {
 520    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 521    struct dri2_egl_display *dri2_dpy =
 522       dri2_egl_display(dri2_surf->base.Resource.Display);
 523    xcb_dri2_dri2_buffer_t *buffers;
 524    xcb_dri2_get_buffers_with_format_reply_t *reply;
 525    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 526    xcb_dri2_attach_format_t *format_attachments;
 527
 528    (void) driDrawable;
 529
 530    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 531    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 532                                                         dri2_surf->drawable,
 533                                                         count, count,
 534                                                         format_attachments);
 535
 536    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 537                                                    cookie, NULL);
 538    if (reply == NULL)
 539       return NULL;
 540
 541    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 542    dri2_surf->base.Width = *width = reply->width;
 543    dri2_surf->base.Height = *height = reply->height;
 544    *out_count = reply->count;
 545    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 546
 547    free(reply);
 548
 549    return dri2_surf->buffers;
 550 }
 551
 552 static void
 553 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 554 {
 555    (void) driDrawable;
 556
 557    /* FIXME: Does EGL support front buffer rendering at all? */
 558
 559 #if 0
 560    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 561
 562    dri2WaitGL(dri2_surf);
 563 #else
 564    (void) loaderPrivate;
 565 #endif
 566 }
 567
 568 static int
 569 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 570 {
 571    xcb_dri2_authenticate_reply_t *authenticate;
 572    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 573    int ret = 0;
 574
 575    authenticate_cookie =
 576       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 577    authenticate =
 578       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 579
 580    if (authenticate == NULL || !authenticate->authenticated)
 581       ret = -1;
 582
 583    free(authenticate);
 584
 585    return ret;
 586 }
 587
 588 static EGLBoolean
 589 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 590 {
 591 #ifdef HAVE_LIBDRM
 592    drm_magic_t magic;
 593
 594    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 595       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 596       return EGL_FALSE;
 597    }
 598
 599    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 600       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 601       return EGL_FALSE;
 602    }
 603 #endif
 604    return EGL_TRUE;
 605 }
 606
 607 static EGLBoolean
 608 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 609 {
 610    xcb_xfixes_query_version_reply_t *xfixes_query;
 611    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 612    xcb_dri2_query_version_reply_t *dri2_query;
 613    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 614    xcb_dri2_connect_reply_t *connect;
 615    xcb_dri2_connect_cookie_t connect_cookie;
 616    xcb_generic_error_t *error;
 617    char *driver_name, *loader_driver_name, *device_name;
 618    const xcb_query_extension_reply_t *extension;
 619
 620    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 621    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 622
 623    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 624    if (!(extension && extension->present))
 625       return EGL_FALSE;
 626
 627    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 628    if (!(extension && extension->present))
 629       return EGL_FALSE;
 630
 631    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 632                                                   XCB_XFIXES_MAJOR_VERSION,
 633                                                   XCB_XFIXES_MINOR_VERSION);
 634
 635    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 636                                                XCB_DRI2_MAJOR_VERSION,
 637                                                XCB_DRI2_MINOR_VERSION);
 638
 639    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 640                                    XCB_DRI2_DRIVER_TYPE_DRI);
 641
 642    xfixes_query =
 643       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 644                                       xfixes_query_cookie, &error);
 645    if (xfixes_query == NULL ||
 646        error != NULL || xfixes_query->major_version < 2) {
 647       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 648       free(error);
 649       return EGL_FALSE;
 650    }
 651    free(xfixes_query);
 652
 653    dri2_query =
 654       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 655    if (dri2_query == NULL || error != NULL) {
 656       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 657       free(error);
 658       return EGL_FALSE;
 659    }
 660    dri2_dpy->dri2_major = dri2_query->major_version;
 661    dri2_dpy->dri2_minor = dri2_query->minor_version;
 662    free(dri2_query);
 663
 664    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 665    if (connect == NULL ||
 666        connect->driver_name_length + connect->device_name_length == 0) {
 667       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 668       return EGL_FALSE;
 669    }
 670
 671    device_name = xcb_dri2_connect_device_name (connect);
 672
 673    dri2_dpy->fd = loader_open_device(device_name);
 674    if (dri2_dpy->fd == -1) {
 675       _eglLog(_EGL_WARNING,
 676               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 677       free(connect);
 678       return EGL_FALSE;
 679    }
 680
 681    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 682       close(dri2_dpy->fd);
 683       free(connect);
 684       return EGL_FALSE;
 685    }
 686
 687    driver_name = xcb_dri2_connect_driver_name (connect);
 688
 689    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 690     * Otherwise, default to the server's value.
 691     */
 692    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 693    if (loader_driver_name) {
 694       dri2_dpy->driver_name = loader_driver_name;
 695    } else {
 696       dri2_dpy->driver_name =
 697          strndup(driver_name,
 698                  xcb_dri2_connect_driver_name_length(connect));
 699    }
 700
 701    if (dri2_dpy->driver_name == NULL) {
 702       close(dri2_dpy->fd);
 703       free(dri2_dpy->driver_name);
 704       free(connect);
 705       return EGL_FALSE;
 706    }
 707
 708 #ifdef HAVE_WAYLAND_PLATFORM
 709    dri2_dpy->device_name =
 710       strndup(device_name,
 711               xcb_dri2_connect_device_name_length(connect));
 712 #endif
 713
 714    free(connect);
 715
 716    return EGL_TRUE;
 717 }
 718
 719 static int
 720 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 721 {
 722    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 723
 724    return dri2_x11_do_authenticate(dri2_dpy, id);
 725 }
 726
 727 static EGLBoolean
 728 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 729                                  _EGLDisplay *disp, bool supports_preserved)
 730 {
 731    xcb_depth_iterator_t d;
 732    xcb_visualtype_t *visuals;
 733    int i, j, count;
 734    unsigned int rgba_masks[4];
 735    EGLint surface_type;
 736    EGLint config_attrs[] = {
 737            EGL_NATIVE_VISUAL_ID,   0,
 738            EGL_NATIVE_VISUAL_TYPE, 0,
 739            EGL_NONE
 740    };
 741
 742    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 743    count = 0;
 744
 745    surface_type =
 746       EGL_WINDOW_BIT |
 747       EGL_PIXMAP_BIT |
 748       EGL_PBUFFER_BIT;
 749
 750    if (supports_preserved)
 751       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 752
 753    while (d.rem > 0) {
 754       EGLBoolean class_added[6] = { 0, };
 755
 756       visuals = xcb_depth_visuals(d.data);
 757       for (i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 758          if (class_added[visuals[i]._class])
 759             continue;
 760
 761          class_added[visuals[i]._class] = EGL_TRUE;
 762          for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 763             struct dri2_egl_config *dri2_conf;
 764             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 765
 766             config_attrs[1] = visuals[i].visual_id;
 767             config_attrs[3] = visuals[i]._class;
 768
 769             rgba_masks[0] = visuals[i].red_mask;
 770             rgba_masks[1] = visuals[i].green_mask;
 771             rgba_masks[2] = visuals[i].blue_mask;
 772             rgba_masks[3] = 0;
 773             dri2_conf = dri2_add_config(disp, config, count + 1, surface_type,
 774                                         config_attrs, rgba_masks);
 775             if (dri2_conf)
 776                count++;
 777
 778             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 779              * Otherwise it will only match a 32-bit RGBA visual.  On a
 780              * composited window manager on X11, this will make all of the
 781              * EGLConfigs with destination alpha get blended by the
 782              * compositor.  This is probably not what the application
 783              * wants... especially on drivers that only have 32-bit RGBA
 784              * EGLConfigs! */
 785             if (d.data->depth == 24) {
 786                rgba_masks[3] =
 787                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 788                dri2_conf = dri2_add_config(disp, config, count + 1, surface_type,
 789                                            config_attrs, rgba_masks);
 790                if (dri2_conf)
 791                   count++;
 792             }
 793          }
 794       }
 795
 796       xcb_depth_next(&d);
 797    }
 798
 799    if (!count) {
 800       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 801       return EGL_FALSE;
 802    }
 803
 804    return EGL_TRUE;
 805 }
 806
 807 static EGLBoolean
 808 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 809                  _EGLSurface *draw, xcb_xfixes_region_t region)
 810 {
 811    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 812    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 813    enum xcb_dri2_attachment_t render_attachment;
 814    xcb_dri2_copy_region_cookie_t cookie;
 815
 816    /* No-op for a pixmap or pbuffer surface */
 817    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 818       return EGL_TRUE;
 819
 820    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 821
 822    if (dri2_surf->have_fake_front)
 823       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 824    else
 825       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 826
 827    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 828                                            dri2_surf->drawable,
 829                                            region,
 830                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 831                                            render_attachment);
 832    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 833
 834    return EGL_TRUE;
 835 }
 836
 837 static int64_t
 838 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 839                           int64_t msc, int64_t divisor, int64_t remainder)
 840 {
 841    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 842    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 843    uint32_t msc_hi = msc >> 32;
 844    uint32_t msc_lo = msc & 0xffffffff;
 845    uint32_t divisor_hi = divisor >> 32;
 846    uint32_t divisor_lo = divisor & 0xffffffff;
 847    uint32_t remainder_hi = remainder >> 32;
 848    uint32_t remainder_lo = remainder & 0xffffffff;
 849    xcb_dri2_swap_buffers_cookie_t cookie;
 850    xcb_dri2_swap_buffers_reply_t *reply;
 851    int64_t swap_count = -1;
 852
 853    /* No-op for a pixmap or pbuffer surface */
 854    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 855       return 0;
 856
 857    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 858       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 859
 860    dri2_flush_drawable_for_swapbuffers(disp, draw);
 861
 862    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 863                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 864
 865    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 866
 867    if (reply) {
 868       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 869       free(reply);
 870    }
 871
 872    /* Since we aren't watching for the server's invalidate events like we're
 873     * supposed to (due to XCB providing no mechanism for filtering the events
 874     * the way xlib does), and SwapBuffers is a common cause of invalidate
 875     * events, just shove one down to the driver, even though we haven't told
 876     * the driver that we're the kind of loader that provides reliable
 877     * invalidate events.  This causes the driver to request buffers again at
 878     * its next draw, so that we get the correct buffers if a pageflip
 879     * happened.  The driver should still be using the viewport hack to catch
 880     * window resizes.
 881     */
 882    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 883       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 884
 885    return swap_count;
 886 }
 887
 888 static EGLBoolean
 889 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 890 {
 891    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 892    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 893
 894    if (!dri2_dpy->flush) {
 895       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 896       return EGL_TRUE;
 897    }
 898
 899    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 900       /* Swap failed with a window drawable. */
 901       _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 902       return EGL_FALSE;
 903    }
 904    return EGL_TRUE;
 905 }
 906
 907 static EGLBoolean
 908 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 909                              _EGLSurface *draw,
 910                              EGLint numRects, const EGLint *rects)
 911 {
 912    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 913    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 914    EGLBoolean ret;
 915    xcb_xfixes_region_t region;
 916    xcb_rectangle_t rectangles[16];
 917    int i;
 918
 919    if (numRects > (int)ARRAY_SIZE(rectangles))
 920       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 921
 922    for (i = 0; i < numRects; i++) {
 923       rectangles[i].x = rects[i * 4];
 924       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 925       rectangles[i].width = rects[i * 4 + 2];
 926       rectangles[i].height = rects[i * 4 + 3];
 927    }
 928
 929    region = xcb_generate_id(dri2_dpy->conn);
 930    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 931    ret = dri2_copy_region(drv, disp, draw, region);
 932    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 933
 934    return ret;
 935 }
 936
 937 static EGLBoolean
 938 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 939                      EGLint x, EGLint y, EGLint width, EGLint height)
 940 {
 941    const EGLint rect[4] = { x, y, width, height };
 942
 943    if (x < 0 || y < 0 || width < 0 || height < 0)
 944       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 945
 946    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 947 }
 948
 949 static EGLBoolean
 950 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 951                        EGLint interval)
 952 {
 953    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 954    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 955
 956    if (interval > surf->Config->MaxSwapInterval)
 957       interval = surf->Config->MaxSwapInterval;
 958    else if (interval < surf->Config->MinSwapInterval)
 959       interval = surf->Config->MinSwapInterval;
 960
 961    if (interval != surf->SwapInterval && dri2_dpy->swap_available)
 962       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 963
 964    surf->SwapInterval = interval;
 965
 966    return EGL_TRUE;
 967 }
 968
 969 static EGLBoolean
 970 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 971                       void *native_pixmap_target)
 972 {
 973    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 974    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 975    xcb_gcontext_t gc;
 976    xcb_pixmap_t target;
 977
 978    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 979    target = (uintptr_t) native_pixmap_target;
 980
 981    (void) drv;
 982
 983    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 984
 985    gc = xcb_generate_id(dri2_dpy->conn);
 986    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 987    xcb_copy_area(dri2_dpy->conn,
 988                   dri2_surf->drawable,
 989                   target,
 990                   gc,
 991                   0, 0,
 992                   0, 0,
 993                   dri2_surf->base.Width,
 994                   dri2_surf->base.Height);
 995    xcb_free_gc(dri2_dpy->conn, gc);
 996
 997    return EGL_TRUE;
 998 }
 999
1000 static _EGLImage *
1001 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1002                              EGLClientBuffer buffer, const EGLint *attr_list)
1003 {
1004    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1005    struct dri2_egl_image *dri2_img;
1006    unsigned int attachments[1];
1007    xcb_drawable_t drawable;
1008    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1009    xcb_dri2_get_buffers_reply_t *buffers_reply;
1010    xcb_dri2_dri2_buffer_t *buffers;
1011    xcb_get_geometry_cookie_t geometry_cookie;
1012    xcb_get_geometry_reply_t *geometry_reply;
1013    xcb_generic_error_t *error;
1014    int stride, format;
1015
1016    (void) ctx;
1017
1018    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1019    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1020    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1021    buffers_cookie =
1022       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1023                                       drawable, 1, 1, attachments);
1024    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1025    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1026                                                buffers_cookie, NULL);
1027    if (buffers_reply == NULL)
1028      return NULL;
1029
1030    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1031    if (buffers == NULL) {
1032       return NULL;
1033    }
1034
1035    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1036                                             geometry_cookie, &error);
1037    if (geometry_reply == NULL || error != NULL) {
1038       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1039       free(error);
1040       free(buffers_reply);
1041       return NULL;
1042    }
1043
1044    switch (geometry_reply->depth) {
1045    case 16:
1046       format = __DRI_IMAGE_FORMAT_RGB565;
1047       break;
1048    case 24:
1049       format = __DRI_IMAGE_FORMAT_XRGB8888;
1050       break;
1051    case 32:
1052       format = __DRI_IMAGE_FORMAT_ARGB8888;
1053       break;
1054    default:
1055       _eglError(EGL_BAD_PARAMETER,
1056                 "dri2_create_image_khr: unsupported pixmap depth");
1057       free(buffers_reply);
1058       free(geometry_reply);
1059       return NULL;
1060    }
1061
1062    dri2_img = malloc(sizeof *dri2_img);
1063    if (!dri2_img) {
1064       free(buffers_reply);
1065       free(geometry_reply);
1066       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1067       return EGL_NO_IMAGE_KHR;
1068    }
1069
1070    if (!_eglInitImage(&dri2_img->base, disp)) {
1071       free(buffers_reply);
1072       free(geometry_reply);
1073       free(dri2_img);
1074       return EGL_NO_IMAGE_KHR;
1075    }
1076
1077    stride = buffers[0].pitch / buffers[0].cpp;
1078    dri2_img->dri_image =
1079       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1080                                            buffers_reply->width,
1081                                            buffers_reply->height,
1082                                            format,
1083                                            buffers[0].name,
1084                                            stride,
1085                                            dri2_img);
1086
1087    free(buffers_reply);
1088    free(geometry_reply);
1089
1090    return &dri2_img->base;
1091 }
1092
1093 static _EGLImage *
1094 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1095                           _EGLContext *ctx, EGLenum target,
1096                           EGLClientBuffer buffer, const EGLint *attr_list)
1097 {
1098    (void) drv;
1099
1100    switch (target) {
1101    case EGL_NATIVE_PIXMAP_KHR:
1102       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1103    default:
1104       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1105    }
1106 }
1107
1108 static EGLBoolean
1109 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1110                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1111                          EGLuint64KHR *sbc)
1112 {
1113    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1114    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1115    xcb_dri2_get_msc_cookie_t cookie;
1116    xcb_dri2_get_msc_reply_t *reply;
1117
1118    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1119    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1120
1121    if (!reply) {
1122       _eglError(EGL_BAD_ACCESS, __func__);
1123       return EGL_FALSE;
1124    }
1125
1126    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1127    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1128    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1129    free(reply);
1130
1131    return EGL_TRUE;
1132 }
1133
1134 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1135    .authenticate = NULL,
1136    .create_window_surface = dri2_x11_create_window_surface,
1137    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1138    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1139    .destroy_surface = dri2_x11_destroy_surface,
1140    .create_image = dri2_fallback_create_image_khr,
1141    .swap_interval = dri2_fallback_swap_interval,
1142    .swap_buffers = dri2_x11_swap_buffers,
1143    .set_damage_region = dri2_fallback_set_damage_region,
1144    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1145    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1146    .copy_buffers = dri2_x11_copy_buffers,
1147    .query_buffer_age = dri2_fallback_query_buffer_age,
1148    .query_surface = dri2_query_surface,
1149    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1150    .get_sync_values = dri2_fallback_get_sync_values,
1151    .get_dri_drawable = dri2_surface_get_dri_drawable,
1152 };
1153
1154 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1155    .authenticate = dri2_x11_authenticate,
1156    .create_window_surface = dri2_x11_create_window_surface,
1157    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1158    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1159    .destroy_surface = dri2_x11_destroy_surface,
1160    .create_image = dri2_x11_create_image_khr,
1161    .swap_interval = dri2_x11_swap_interval,
1162    .swap_buffers = dri2_x11_swap_buffers,
1163    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1164    .swap_buffers_region = dri2_x11_swap_buffers_region,
1165    .set_damage_region = dri2_fallback_set_damage_region,
1166    .post_sub_buffer = dri2_x11_post_sub_buffer,
1167    .copy_buffers = dri2_x11_copy_buffers,
1168    .query_buffer_age = dri2_fallback_query_buffer_age,
1169    .query_surface = dri2_query_surface,
1170    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1171    .get_sync_values = dri2_x11_get_sync_values,
1172    .get_dri_drawable = dri2_surface_get_dri_drawable,
1173 };
1174
1175 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1176    .base = { __DRI_SWRAST_LOADER, 1 },
1177
1178    .getDrawableInfo = swrastGetDrawableInfo,
1179    .putImage        = swrastPutImage,
1180    .getImage        = swrastGetImage,
1181 };
1182
1183 static const __DRIextension *swrast_loader_extensions[] = {
1184    &swrast_loader_extension.base,
1185    NULL,
1186 };
1187
1188 static EGLBoolean
1189 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1190                         struct dri2_egl_display *dri2_dpy)
1191 {
1192    xcb_screen_iterator_t s;
1193    int screen = (uintptr_t)disp->Options.Platform;
1194    const char *msg;
1195
1196    disp->DriverData = (void *) dri2_dpy;
1197    if (disp->PlatformDisplay == NULL) {
1198       dri2_dpy->conn = xcb_connect(NULL, &screen);
1199       dri2_dpy->own_device = true;
1200    } else {
1201       Display *dpy = disp->PlatformDisplay;
1202
1203       dri2_dpy->conn = XGetXCBConnection(dpy);
1204       screen = DefaultScreen(dpy);
1205    }
1206
1207    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1208       msg = "xcb_connect failed";
1209       goto disconnect;
1210    }
1211
1212    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1213    dri2_dpy->screen = get_xcb_screen(s, screen);
1214    if (!dri2_dpy->screen) {
1215       msg = "failed to get xcb screen";
1216       goto disconnect;
1217    }
1218
1219    return EGL_TRUE;
1220 disconnect:
1221    if (disp->PlatformDisplay == NULL)
1222       xcb_disconnect(dri2_dpy->conn);
1223
1224    return _eglError(EGL_BAD_ALLOC, msg);
1225 }
1226
1227 static EGLBoolean
1228 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1229 {
1230    struct dri2_egl_display *dri2_dpy;
1231
1232    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1233    if (!dri2_dpy)
1234       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1235
1236    dri2_dpy->fd = -1;
1237    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1238       goto cleanup;
1239
1240    /*
1241     * Every hardware driver_name is set using strdup. Doing the same in
1242     * here will allow is to simply free the memory at dri2_terminate().
1243     */
1244    dri2_dpy->driver_name = strdup("swrast");
1245    if (!dri2_load_driver_swrast(disp))
1246       goto cleanup;
1247
1248    dri2_dpy->loader_extensions = swrast_loader_extensions;
1249
1250    if (!dri2_create_screen(disp))
1251       goto cleanup;
1252
1253    if (!dri2_setup_extensions(disp))
1254       goto cleanup;
1255
1256    dri2_setup_screen(disp);
1257
1258    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1259       goto cleanup;
1260
1261    /* Fill vtbl last to prevent accidentally calling virtual function during
1262     * initialization.
1263     */
1264    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1265
1266    return EGL_TRUE;
1267
1268  cleanup:
1269    dri2_display_destroy(disp);
1270    return EGL_FALSE;
1271 }
1272
1273 static void
1274 dri2_x11_setup_swap_interval(struct dri2_egl_display *dri2_dpy)
1275 {
1276    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
1277    int arbitrary_max_interval = 1000;
1278
1279    /* default behavior for no SwapBuffers support: no vblank syncing
1280     * either.
1281     */
1282    dri2_dpy->min_swap_interval = 0;
1283    dri2_dpy->max_swap_interval = 0;
1284
1285    if (!dri2_dpy->swap_available)
1286       return;
1287
1288    /* If we do have swapbuffers, then we can support pretty much any swap
1289     * interval, but we allow driconf to override applications.
1290     */
1291    if (dri2_dpy->config)
1292       dri2_dpy->config->configQueryi(dri2_dpy->dri_screen,
1293                                      "vblank_mode", &vblank_mode);
1294    switch (vblank_mode) {
1295    case DRI_CONF_VBLANK_NEVER:
1296       dri2_dpy->min_swap_interval = 0;
1297       dri2_dpy->max_swap_interval = 0;
1298       dri2_dpy->default_swap_interval = 0;
1299       break;
1300    case DRI_CONF_VBLANK_ALWAYS_SYNC:
1301       dri2_dpy->min_swap_interval = 1;
1302       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1303       dri2_dpy->default_swap_interval = 1;
1304       break;
1305    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
1306       dri2_dpy->min_swap_interval = 0;
1307       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1308       dri2_dpy->default_swap_interval = 0;
1309       break;
1310    default:
1311    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
1312       dri2_dpy->min_swap_interval = 0;
1313       dri2_dpy->max_swap_interval = arbitrary_max_interval;
1314       dri2_dpy->default_swap_interval = 1;
1315       break;
1316    }
1317 }
1318
1319 #ifdef HAVE_DRI3
1320
1321 static const __DRIextension *dri3_image_loader_extensions[] = {
1322    &dri3_image_loader_extension.base,
1323    &image_lookup_extension.base,
1324    &use_invalidate.base,
1325    NULL,
1326 };
1327
1328 static EGLBoolean
1329 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1330 {
1331    struct dri2_egl_display *dri2_dpy;
1332
1333    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1334    if (!dri2_dpy)
1335       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1336
1337    dri2_dpy->fd = -1;
1338    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1339       goto cleanup;
1340
1341    if (!dri3_x11_connect(dri2_dpy))
1342       goto cleanup;
1343
1344    if (!dri2_load_driver_dri3(disp))
1345       goto cleanup;
1346
1347    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1348
1349    dri2_dpy->swap_available = true;
1350    dri2_dpy->invalidate_available = true;
1351
1352    if (!dri2_create_screen(disp))
1353       goto cleanup;
1354
1355    if (!dri2_setup_extensions(disp))
1356       goto cleanup;
1357
1358    dri2_setup_screen(disp);
1359
1360    dri2_x11_setup_swap_interval(dri2_dpy);
1361
1362    if (!dri2_dpy->is_different_gpu)
1363       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1364    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1365    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1366    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1367
1368    dri2_set_WL_bind_wayland_display(drv, disp);
1369
1370    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1371       goto cleanup;
1372
1373    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1374    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1375    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1376    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1377    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1378    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1379
1380    /* Fill vtbl last to prevent accidentally calling virtual function during
1381     * initialization.
1382     */
1383    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1384
1385    _eglLog(_EGL_INFO, "Using DRI3");
1386
1387    return EGL_TRUE;
1388
1389  cleanup:
1390    dri2_display_destroy(disp);
1391    return EGL_FALSE;
1392 }
1393 #endif
1394
1395 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1396    .base = { __DRI_DRI2_LOADER, 2 },
1397
1398    .getBuffers           = dri2_x11_get_buffers,
1399    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1400    .getBuffersWithFormat = NULL,
1401 };
1402
1403 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1404    .base = { __DRI_DRI2_LOADER, 3 },
1405
1406    .getBuffers           = dri2_x11_get_buffers,
1407    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1408    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1409 };
1410
1411 static const __DRIextension *dri2_loader_extensions_old[] = {
1412    &dri2_loader_extension_old.base,
1413    &image_lookup_extension.base,
1414    &background_callable_extension.base,
1415    NULL,
1416 };
1417
1418 static const __DRIextension *dri2_loader_extensions[] = {
1419    &dri2_loader_extension.base,
1420    &image_lookup_extension.base,
1421    &background_callable_extension.base,
1422    NULL,
1423 };
1424
1425 static EGLBoolean
1426 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1427 {
1428    struct dri2_egl_display *dri2_dpy;
1429
1430    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1431    if (!dri2_dpy)
1432       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1433
1434    dri2_dpy->fd = -1;
1435    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1436       goto cleanup;
1437
1438    if (!dri2_x11_connect(dri2_dpy))
1439       goto cleanup;
1440
1441    if (!dri2_load_driver(disp))
1442       goto cleanup;
1443
1444    if (dri2_dpy->dri2_minor >= 1)
1445       dri2_dpy->loader_extensions = dri2_loader_extensions;
1446    else
1447       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1448
1449    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1450    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1451
1452    if (!dri2_create_screen(disp))
1453       goto cleanup;
1454
1455    if (!dri2_setup_extensions(disp))
1456       goto cleanup;
1457
1458    dri2_setup_screen(disp);
1459
1460    dri2_x11_setup_swap_interval(dri2_dpy);
1461
1462    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1463    disp->Extensions.NOK_swap_region = EGL_TRUE;
1464    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1465    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1466    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1467
1468    dri2_set_WL_bind_wayland_display(drv, disp);
1469
1470    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1471       goto cleanup;
1472
1473    /* Fill vtbl last to prevent accidentally calling virtual function during
1474     * initialization.
1475     */
1476    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1477
1478    _eglLog(_EGL_INFO, "Using DRI2");
1479
1480    return EGL_TRUE;
1481
1482  cleanup:
1483    dri2_display_destroy(disp);
1484    return EGL_FALSE;
1485 }
1486
1487 EGLBoolean
1488 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1489 {
1490    EGLBoolean initialized = EGL_FALSE;
1491
1492    if (!getenv("LIBGL_ALWAYS_SOFTWARE")) {
1493 #ifdef HAVE_DRI3
1494       if (!getenv("LIBGL_DRI3_DISABLE"))
1495          initialized = dri2_initialize_x11_dri3(drv, disp);
1496 #endif
1497
1498       if (!initialized)
1499          initialized = dri2_initialize_x11_dri2(drv, disp);
1500    }
1501
1502    if (!initialized)
1503       initialized = dri2_initialize_x11_swrast(drv, disp);
1504
1505    return initialized;
1506 }
1507