src/glx/dri2_glx.c

   1 /*
   2  * Copyright © 2008 Red Hat, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Soft-
   6  * ware"), to deal in the Software without restriction, including without
   7  * limitation the rights to use, copy, modify, merge, publish, distribute,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, provided that the above copyright
  10  * notice(s) and this permission notice appear in all copies of the Soft-
  11  * ware and that both the above copyright notice(s) and this permission
  12  * notice appear in supporting documentation.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22  * MANCE OF THIS SOFTWARE.
  23  *
  24  * Except as contained in this notice, the name of a copyright holder shall
  25  * not be used in advertising or otherwise to promote the sale, use or
  26  * other dealings in this Software without prior written authorization of
  27  * the copyright holder.
  28  *
  29  * Authors:
  30  *   Kristian Høgsberg (krh@redhat.com)
  31  */
  32
  33 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/Xlib-xcb.h>
  38 #include <xcb/xcb.h>
  39 #include <xcb/dri2.h>
  40 #include "glapi.h"
  41 #include "glxclient.h"
  42 #include <X11/extensions/dri2proto.h>
  43 #include "xf86dri.h"
  44 #include <dlfcn.h>
  45 #include <fcntl.h>
  46 #include <unistd.h>
  47 #include <sys/types.h>
  48 #include <sys/mman.h>
  49 #include <sys/time.h>
  50 #include "xf86drm.h"
  51 #include "dri2.h"
  52 #include "dri_common.h"
  53
  54 /* From xmlpool/options.h, user exposed so should be stable */
  55 #define DRI_CONF_VBLANK_NEVER 0
  56 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  57 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  58 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  59
  60 #undef DRI2_MINOR
  61 #define DRI2_MINOR 1
  62
  63 struct dri2_display
  64 {
  65    __GLXDRIdisplay base;
  66
  67    /*
  68     ** XFree86-DRI version information
  69     */
  70    int driMajor;
  71    int driMinor;
  72    int driPatch;
  73    int swapAvailable;
  74    int invalidateAvailable;
  75
  76    __glxHashTable *dri2Hash;
  77
  78    const __DRIextension *loader_extensions[4];
  79 };
  80
  81 struct dri2_screen {
  82    struct glx_screen base;
  83
  84    __DRIscreen *driScreen;
  85    __GLXDRIscreen vtable;
  86    const __DRIdri2Extension *dri2;
  87    const __DRIcoreExtension *core;
  88
  89    const __DRI2flushExtension *f;
  90    const __DRI2configQueryExtension *config;
  91    const __DRItexBufferExtension *texBuffer;
  92    const __DRI2throttleExtension *throttle;
  93    const __DRIconfig **driver_configs;
  94
  95    void *driver;
  96    int fd;
  97
  98    Bool show_fps;
  99 };
 100
 101 struct dri2_context
 102 {
 103    struct glx_context base;
 104    __DRIcontext *driContext;
 105 };
 106
 107 struct dri2_drawable
 108 {
 109    __GLXDRIdrawable base;
 110    __DRIdrawable *driDrawable;
 111    __DRIbuffer buffers[5];
 112    int bufferCount;
 113    int width, height;
 114    int have_back;
 115    int have_fake_front;
 116    int swap_interval;
 117
 118    uint64_t previous_time;
 119    unsigned frames;
 120 };
 121
 122 static const struct glx_context_vtable dri2_context_vtable;
 123
 124 /* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
 125  * low halves separately.  This helps you split them.
 126  */
 127 static void
 128 split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
 129 {
 130    *hi = (counter >> 32);
 131    *lo = counter & 0xffffffff;
 132 }
 133
 134 static uint64_t
 135 merge_counter(uint32_t hi, uint32_t lo)
 136 {
 137    return ((uint64_t)hi << 32) | lo;
 138 }
 139
 140 static void
 141 dri2_destroy_context(struct glx_context *context)
 142 {
 143    struct dri2_context *pcp = (struct dri2_context *) context;
 144    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 145
 146    driReleaseDrawables(&pcp->base);
 147
 148    free((char *) context->extensions);
 149
 150    (*psc->core->destroyContext) (pcp->driContext);
 151
 152    free(pcp);
 153 }
 154
 155 static Bool
 156 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 157                   GLXDrawable draw, GLXDrawable read)
 158 {
 159    struct dri2_context *pcp = (struct dri2_context *) context;
 160    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 161    struct dri2_drawable *pdraw, *pread;
 162    struct dri2_display *pdp;
 163
 164    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 165    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 166
 167    driReleaseDrawables(&pcp->base);
 168
 169    if (pdraw == NULL || pread == NULL)
 170       return GLXBadDrawable;
 171
 172    if (!(*psc->core->bindContext) (pcp->driContext,
 173                                    pdraw->driDrawable, pread->driDrawable))
 174       return GLXBadContext;
 175
 176    /* If the server doesn't send invalidate events, we may miss a
 177     * resize before the rendering starts.  Invalidate the buffers now
 178     * so the driver will recheck before rendering starts. */
 179    pdp = (struct dri2_display *) psc->base.display;
 180    if (!pdp->invalidateAvailable) {
 181       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 182       if (pread != pdraw)
 183          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 184    }
 185
 186    return Success;
 187 }
 188
 189 static void
 190 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 191 {
 192    struct dri2_context *pcp = (struct dri2_context *) context;
 193    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 194
 195    (*psc->core->unbindContext) (pcp->driContext);
 196 }
 197
 198 static struct glx_context *
 199 dri2_create_context(struct glx_screen *base,
 200                     struct glx_config *config_base,
 201                     struct glx_context *shareList, int renderType)
 202 {
 203    struct dri2_context *pcp, *pcp_shared;
 204    struct dri2_screen *psc = (struct dri2_screen *) base;
 205    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 206    __DRIcontext *shared = NULL;
 207
 208    if (shareList) {
 209       /* If the shareList context is not a DRI2 context, we cannot possibly
 210        * create a DRI2 context that shares it.
 211        */
 212       if (shareList->vtable->destroy != dri2_destroy_context) {
 213          return NULL;
 214       }
 215
 216       pcp_shared = (struct dri2_context *) shareList;
 217       shared = pcp_shared->driContext;
 218    }
 219
 220    pcp = calloc(1, sizeof *pcp);
 221    if (pcp == NULL)
 222       return NULL;
 223
 224    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 225       free(pcp);
 226       return NULL;
 227    }
 228
 229    pcp->driContext =
 230       (*psc->dri2->createNewContext) (psc->driScreen,
 231                                       config->driConfig, shared, pcp);
 232
 233    if (pcp->driContext == NULL) {
 234       free(pcp);
 235       return NULL;
 236    }
 237
 238    pcp->base.vtable = &dri2_context_vtable;
 239
 240    return &pcp->base;
 241 }
 242
 243 static struct glx_context *
 244 dri2_create_context_attribs(struct glx_screen *base,
 245                             struct glx_config *config_base,
 246                             struct glx_context *shareList,
 247                             unsigned num_attribs,
 248                             const uint32_t *attribs,
 249                             unsigned *error)
 250 {
 251    struct dri2_context *pcp = NULL;
 252    struct dri2_context *pcp_shared = NULL;
 253    struct dri2_screen *psc = (struct dri2_screen *) base;
 254    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 255    __DRIcontext *shared = NULL;
 256
 257    uint32_t minor_ver = 1;
 258    uint32_t major_ver = 2;
 259    uint32_t flags = 0;
 260    unsigned api;
 261    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 262    uint32_t ctx_attribs[2 * 5];
 263    unsigned num_ctx_attribs = 0;
 264
 265    if (psc->dri2->base.version < 3) {
 266       *error = __DRI_CTX_ERROR_NO_MEMORY;
 267       goto error_exit;
 268    }
 269
 270    /* Remap the GLX tokens to DRI2 tokens.
 271     */
 272    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 273                                  &major_ver, &minor_ver, &flags, &api, &reset,
 274                                  error))
 275       goto error_exit;
 276
 277    if (shareList) {
 278       pcp_shared = (struct dri2_context *) shareList;
 279       shared = pcp_shared->driContext;
 280    }
 281
 282    pcp = calloc(1, sizeof *pcp);
 283    if (pcp == NULL) {
 284       *error = __DRI_CTX_ERROR_NO_MEMORY;
 285       goto error_exit;
 286    }
 287
 288    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 289       goto error_exit;
 290
 291    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 292    ctx_attribs[num_ctx_attribs++] = major_ver;
 293    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 294    ctx_attribs[num_ctx_attribs++] = minor_ver;
 295
 296    /* Only send a value when the non-default value is requested.  By doing
 297     * this we don't have to check the driver's DRI2 version before sending the
 298     * default value.
 299     */
 300    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 301       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 302       ctx_attribs[num_ctx_attribs++] = reset;
 303    }
 304
 305    if (flags != 0) {
 306       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 307
 308       /* The current __DRI_CTX_FLAG_* values are identical to the
 309        * GLX_CONTEXT_*_BIT values.
 310        */
 311       ctx_attribs[num_ctx_attribs++] = flags;
 312    }
 313
 314    pcp->driContext =
 315       (*psc->dri2->createContextAttribs) (psc->driScreen,
 316                                           api,
 317                                           config->driConfig,
 318                                           shared,
 319                                           num_ctx_attribs / 2,
 320                                           ctx_attribs,
 321                                           error,
 322                                           pcp);
 323
 324    if (pcp->driContext == NULL)
 325       goto error_exit;
 326
 327    pcp->base.vtable = &dri2_context_vtable;
 328
 329    return &pcp->base;
 330
 331 error_exit:
 332    free(pcp);
 333
 334    return NULL;
 335 }
 336
 337 static void
 338 dri2DestroyDrawable(__GLXDRIdrawable *base)
 339 {
 340    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 341    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 342    struct glx_display *dpyPriv = psc->base.display;
 343    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 344
 345    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 346    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 347
 348    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 349     * now, as the application explicitly asked to destroy the GLX
 350     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 351     * drawable linger on the server, since there's no good way of
 352     * knowing when the application is done with it.  The server will
 353     * destroy the DRI2 drawable when it destroys the X drawable or the
 354     * client exits anyway. */
 355    if (pdraw->base.xDrawable != pdraw->base.drawable)
 356       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 357
 358    free(pdraw);
 359 }
 360
 361 static __GLXDRIdrawable *
 362 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 363                    GLXDrawable drawable, struct glx_config *config_base)
 364 {
 365    struct dri2_drawable *pdraw;
 366    struct dri2_screen *psc = (struct dri2_screen *) base;
 367    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 368    struct glx_display *dpyPriv;
 369    struct dri2_display *pdp;
 370    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 371
 372    pdraw = calloc(1, sizeof(*pdraw));
 373    if (!pdraw)
 374       return NULL;
 375
 376    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 377    pdraw->base.xDrawable = xDrawable;
 378    pdraw->base.drawable = drawable;
 379    pdraw->base.psc = &psc->base;
 380    pdraw->bufferCount = 0;
 381    pdraw->swap_interval = 1; /* default may be overridden below */
 382    pdraw->have_back = 0;
 383
 384    if (psc->config)
 385       psc->config->configQueryi(psc->driScreen,
 386                                 "vblank_mode", &vblank_mode);
 387
 388    switch (vblank_mode) {
 389    case DRI_CONF_VBLANK_NEVER:
 390    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 391       pdraw->swap_interval = 0;
 392       break;
 393    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 394    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 395    default:
 396       pdraw->swap_interval = 1;
 397       break;
 398    }
 399
 400    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 401
 402    dpyPriv = __glXInitialize(psc->base.dpy);
 403    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 404    /* Create a new drawable */
 405    pdraw->driDrawable =
 406       (*psc->dri2->createNewDrawable) (psc->driScreen,
 407                                        config->driConfig, pdraw);
 408
 409    if (!pdraw->driDrawable) {
 410       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 411       free(pdraw);
 412       return NULL;
 413    }
 414
 415    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 416       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 417       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 418       free(pdraw);
 419       return None;
 420    }
 421
 422
 423 #ifdef X_DRI2SwapInterval
 424    /*
 425     * Make sure server has the same swap interval we do for the new
 426     * drawable.
 427     */
 428    if (pdp->swapAvailable)
 429       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 430 #endif
 431
 432    return &pdraw->base;
 433 }
 434
 435 #ifdef X_DRI2GetMSC
 436
 437 static int
 438 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 439                    int64_t *ust, int64_t *msc, int64_t *sbc)
 440 {
 441    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 442    int ret;
 443
 444    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 445                     &dri2_ust, &dri2_msc, &dri2_sbc);
 446    *ust = dri2_ust;
 447    *msc = dri2_msc;
 448    *sbc = dri2_sbc;
 449
 450    return ret;
 451 }
 452
 453 #endif
 454
 455
 456 #ifdef X_DRI2WaitMSC
 457
 458 static int
 459 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 460                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 461 {
 462    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 463    int ret;
 464
 465    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 466                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 467    *ust = dri2_ust;
 468    *msc = dri2_msc;
 469    *sbc = dri2_sbc;
 470
 471    return ret;
 472 }
 473
 474 static int
 475 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 476                int64_t *msc, int64_t *sbc)
 477 {
 478    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 479    xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
 480    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
 481    uint32_t target_sbc_hi, target_sbc_lo;
 482
 483    split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
 484
 485    wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
 486                                                  target_sbc_hi, target_sbc_lo);
 487    wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
 488    *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
 489    *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 490    *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
 491    free(wait_sbc_reply);
 492
 493    return 0;
 494 }
 495
 496 #endif /* X_DRI2WaitMSC */
 497
 498 /**
 499  * dri2Throttle - Request driver throttling
 500  *
 501  * This function uses the DRI2 throttle extension to give the
 502  * driver the opportunity to throttle on flush front, copysubbuffer
 503  * and swapbuffers.
 504  */
 505 static void
 506 dri2Throttle(struct dri2_screen *psc,
 507              struct dri2_drawable *draw,
 508              enum __DRI2throttleReason reason)
 509 {
 510    if (psc->throttle) {
 511       struct glx_context *gc = __glXGetCurrentContext();
 512       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 513       __DRIcontext *ctx =
 514          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 515
 516       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 517    }
 518 }
 519
 520 static void
 521 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 522                     int width, int height,
 523                     enum __DRI2throttleReason reason)
 524 {
 525    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 526    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 527    XRectangle xrect;
 528    XserverRegion region;
 529
 530    /* Check we have the right attachments */
 531    if (!priv->have_back)
 532       return;
 533
 534    xrect.x = x;
 535    xrect.y = priv->height - y - height;
 536    xrect.width = width;
 537    xrect.height = height;
 538
 539    if (psc->f)
 540       (*psc->f->flush) (priv->driDrawable);
 541
 542    dri2Throttle(psc, priv, reason);
 543
 544    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 545    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 546                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 547
 548    /* Refresh the fake front (if present) after we just damaged the real
 549     * front.
 550     */
 551    if (priv->have_fake_front)
 552       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 553                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 554
 555    XFixesDestroyRegion(psc->base.dpy, region);
 556 }
 557
 558 static void
 559 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 560                   int width, int height)
 561 {
 562    __dri2CopySubBuffer(pdraw, x, y, width, height,
 563                        __DRI2_THROTTLE_COPYSUBBUFFER);
 564 }
 565
 566
 567 static void
 568 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 569 {
 570    XRectangle xrect;
 571    XserverRegion region;
 572    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 573
 574    xrect.x = 0;
 575    xrect.y = 0;
 576    xrect.width = priv->width;
 577    xrect.height = priv->height;
 578
 579    if (psc->f)
 580       (*psc->f->flush) (priv->driDrawable);
 581
 582    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 583    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 584    XFixesDestroyRegion(psc->base.dpy, region);
 585
 586 }
 587
 588 static void
 589 dri2_wait_x(struct glx_context *gc)
 590 {
 591    struct dri2_drawable *priv = (struct dri2_drawable *)
 592       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 593
 594    if (priv == NULL || !priv->have_fake_front)
 595       return;
 596
 597    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 598 }
 599
 600 static void
 601 dri2_wait_gl(struct glx_context *gc)
 602 {
 603    struct dri2_drawable *priv = (struct dri2_drawable *)
 604       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 605
 606    if (priv == NULL || !priv->have_fake_front)
 607       return;
 608
 609    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 610 }
 611
 612 static void
 613 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 614 {
 615    struct glx_display *priv;
 616    struct dri2_display *pdp;
 617    struct glx_context *gc;
 618    struct dri2_drawable *pdraw = loaderPrivate;
 619    struct dri2_screen *psc;
 620
 621    if (!pdraw)
 622       return;
 623
 624    if (!pdraw->base.psc)
 625       return;
 626
 627    psc = (struct dri2_screen *) pdraw->base.psc;
 628
 629    priv = __glXInitialize(psc->base.dpy);
 630    pdp = (struct dri2_display *) priv->dri2Display;
 631    gc = __glXGetCurrentContext();
 632
 633    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 634
 635    /* Old servers don't send invalidate events */
 636    if (!pdp->invalidateAvailable)
 637        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 638
 639    dri2_wait_gl(gc);
 640 }
 641
 642
 643 static void
 644 dri2DestroyScreen(struct glx_screen *base)
 645 {
 646    struct dri2_screen *psc = (struct dri2_screen *) base;
 647
 648    /* Free the direct rendering per screen data */
 649    (*psc->core->destroyScreen) (psc->driScreen);
 650    driDestroyConfigs(psc->driver_configs);
 651    close(psc->fd);
 652    free(psc);
 653 }
 654
 655 /**
 656  * Process list of buffer received from the server
 657  *
 658  * Processes the list of buffers received in a reply from the server to either
 659  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 660  */
 661 static void
 662 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 663                 unsigned count)
 664 {
 665    int i;
 666
 667    pdraw->bufferCount = count;
 668    pdraw->have_fake_front = 0;
 669    pdraw->have_back = 0;
 670
 671    /* This assumes the DRI2 buffer attachment tokens matches the
 672     * __DRIbuffer tokens. */
 673    for (i = 0; i < count; i++) {
 674       pdraw->buffers[i].attachment = buffers[i].attachment;
 675       pdraw->buffers[i].name = buffers[i].name;
 676       pdraw->buffers[i].pitch = buffers[i].pitch;
 677       pdraw->buffers[i].cpp = buffers[i].cpp;
 678       pdraw->buffers[i].flags = buffers[i].flags;
 679       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 680          pdraw->have_fake_front = 1;
 681       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 682          pdraw->have_back = 1;
 683    }
 684
 685 }
 686
 687 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 688 {
 689       struct glx_display *glx_dpy = __glXInitialize(dpy);
 690       __GLXDRIdrawable *pdraw;
 691       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 692       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 693          return 0;
 694       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 695 }
 696
 697 static void show_fps(struct dri2_drawable *draw)
 698 {
 699    struct timeval tv;
 700    uint64_t current_time;
 701
 702    gettimeofday(&tv, 0);
 703    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 704
 705    draw->frames++;
 706
 707    if (draw->previous_time + 1000000 <= current_time) {
 708       if (draw->previous_time) {
 709          fprintf(stderr, "libGL: FPS = %.1f\n",
 710                  ((uint64_t)draw->frames * 1000000) /
 711                  (double)(current_time - draw->previous_time));
 712       }
 713       draw->frames = 0;
 714       draw->previous_time = current_time;
 715    }
 716 }
 717
 718 static int64_t
 719 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 720                 int64_t remainder)
 721 {
 722     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 723     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 724     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 725     struct dri2_display *pdp =
 726         (struct dri2_display *)dpyPriv->dri2Display;
 727     CARD64 ret = 0;
 728
 729     /* Check we have the right attachments */
 730     if (!priv->have_back)
 731         return ret;
 732
 733     /* Old servers can't handle swapbuffers */
 734     if (!pdp->swapAvailable) {
 735        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 736                            __DRI2_THROTTLE_SWAPBUFFER);
 737     } else {
 738 #ifdef X_DRI2SwapBuffers
 739     if (psc->f) {
 740        struct glx_context *gc = __glXGetCurrentContext();
 741
 742        if (gc) {
 743           (*psc->f->flush)(priv->driDrawable);
 744        }
 745     }
 746
 747        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 748
 749        DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable,
 750                        target_msc, divisor, remainder, &ret);
 751 #endif
 752     }
 753
 754     if (psc->show_fps) {
 755        show_fps(priv);
 756     }
 757
 758     /* Old servers don't send invalidate events */
 759     if (!pdp->invalidateAvailable)
 760        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 761
 762     return ret;
 763 }
 764
 765 static __DRIbuffer *
 766 dri2GetBuffers(__DRIdrawable * driDrawable,
 767                int *width, int *height,
 768                unsigned int *attachments, int count,
 769                int *out_count, void *loaderPrivate)
 770 {
 771    struct dri2_drawable *pdraw = loaderPrivate;
 772    DRI2Buffer *buffers;
 773
 774    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 775                             width, height, attachments, count, out_count);
 776    if (buffers == NULL)
 777       return NULL;
 778
 779    pdraw->width = *width;
 780    pdraw->height = *height;
 781    process_buffers(pdraw, buffers, *out_count);
 782
 783    free(buffers);
 784
 785    return pdraw->buffers;
 786 }
 787
 788 static __DRIbuffer *
 789 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 790                          int *width, int *height,
 791                          unsigned int *attachments, int count,
 792                          int *out_count, void *loaderPrivate)
 793 {
 794    struct dri2_drawable *pdraw = loaderPrivate;
 795    DRI2Buffer *buffers;
 796
 797    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 798                                       pdraw->base.xDrawable,
 799                                       width, height, attachments,
 800                                       count, out_count);
 801    if (buffers == NULL)
 802       return NULL;
 803
 804    pdraw->width = *width;
 805    pdraw->height = *height;
 806    process_buffers(pdraw, buffers, *out_count);
 807
 808    free(buffers);
 809
 810    return pdraw->buffers;
 811 }
 812
 813 #ifdef X_DRI2SwapInterval
 814
 815 static int
 816 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 817 {
 818    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 819    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 820    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 821
 822    if (psc->config)
 823       psc->config->configQueryi(psc->driScreen,
 824                                 "vblank_mode", &vblank_mode);
 825
 826    switch (vblank_mode) {
 827    case DRI_CONF_VBLANK_NEVER:
 828       return GLX_BAD_VALUE;
 829    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 830       if (interval <= 0)
 831          return GLX_BAD_VALUE;
 832       break;
 833    default:
 834       break;
 835    }
 836
 837    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 838    priv->swap_interval = interval;
 839
 840    return 0;
 841 }
 842
 843 static int
 844 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 845 {
 846    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 847
 848   return priv->swap_interval;
 849 }
 850
 851 #endif /* X_DRI2SwapInterval */
 852
 853 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 854    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 855    dri2GetBuffers,
 856    dri2FlushFrontBuffer,
 857    dri2GetBuffersWithFormat,
 858 };
 859
 860 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 861    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 862    dri2GetBuffers,
 863    dri2FlushFrontBuffer,
 864    NULL,
 865 };
 866
 867 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 868    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 869 };
 870
 871 _X_HIDDEN void
 872 dri2InvalidateBuffers(Display *dpy, XID drawable)
 873 {
 874    __GLXDRIdrawable *pdraw =
 875       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 876    struct dri2_screen *psc;
 877    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 878
 879    if (!pdraw)
 880       return;
 881
 882    psc = (struct dri2_screen *) pdraw->psc;
 883
 884    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 885        psc->f->invalidate(pdp->driDrawable);
 886 }
 887
 888 static void
 889 dri2_bind_tex_image(Display * dpy,
 890                     GLXDrawable drawable,
 891                     int buffer, const int *attrib_list)
 892 {
 893    struct glx_context *gc = __glXGetCurrentContext();
 894    struct dri2_context *pcp = (struct dri2_context *) gc;
 895    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 896    struct glx_display *dpyPriv = __glXInitialize(dpy);
 897    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 898    struct dri2_display *pdp =
 899       (struct dri2_display *) dpyPriv->dri2Display;
 900    struct dri2_screen *psc;
 901
 902    if (pdraw != NULL) {
 903       psc = (struct dri2_screen *) base->psc;
 904
 905       if (!pdp->invalidateAvailable && psc->f &&
 906            psc->f->base.version >= 3 && psc->f->invalidate)
 907          psc->f->invalidate(pdraw->driDrawable);
 908
 909       if (psc->texBuffer->base.version >= 2 &&
 910           psc->texBuffer->setTexBuffer2 != NULL) {
 911          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 912                                            pdraw->base.textureTarget,
 913                                            pdraw->base.textureFormat,
 914                                            pdraw->driDrawable);
 915       }
 916       else {
 917          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 918                                           pdraw->base.textureTarget,
 919                                           pdraw->driDrawable);
 920       }
 921    }
 922 }
 923
 924 static void
 925 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 926 {
 927 #if __DRI_TEX_BUFFER_VERSION >= 3
 928    struct glx_context *gc = __glXGetCurrentContext();
 929    struct dri2_context *pcp = (struct dri2_context *) gc;
 930    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 931    struct glx_display *dpyPriv = __glXInitialize(dpy);
 932    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 933    struct dri2_display *pdp =
 934       (struct dri2_display *) dpyPriv->dri2Display;
 935    struct dri2_screen *psc;
 936
 937    if (pdraw != NULL) {
 938       psc = (struct dri2_screen *) base->psc;
 939
 940       if (psc->texBuffer->base.version >= 3 &&
 941           psc->texBuffer->releaseTexBuffer != NULL) {
 942          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 943                                            pdraw->base.textureTarget,
 944                                            pdraw->driDrawable);
 945       }
 946    }
 947 #endif
 948 }
 949
 950 static const struct glx_context_vtable dri2_context_vtable = {
 951    dri2_destroy_context,
 952    dri2_bind_context,
 953    dri2_unbind_context,
 954    dri2_wait_gl,
 955    dri2_wait_x,
 956    DRI_glXUseXFont,
 957    dri2_bind_tex_image,
 958    dri2_release_tex_image,
 959    NULL, /* get_proc_address */
 960 };
 961
 962 static void
 963 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 964 {
 965    int i;
 966
 967    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 968    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 969    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 970    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 971
 972    /* FIXME: if DRI2 version supports it... */
 973    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 974
 975    if (psc->dri2->base.version >= 3) {
 976       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
 977
 978       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 979       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 980
 981       if ((mask & (1 << __DRI_API_GLES2)) != 0)
 982          __glXEnableDirectExtension(&psc->base,
 983                                     "GLX_EXT_create_context_es2_profile");
 984    }
 985
 986    for (i = 0; extensions[i]; i++) {
 987       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 988          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 989          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 990       }
 991
 992       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 993          psc->f = (__DRI2flushExtension *) extensions[i];
 994          /* internal driver extension, no GL extension exposed */
 995       }
 996
 997       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 998          psc->config = (__DRI2configQueryExtension *) extensions[i];
 999
1000       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1001          psc->throttle = (__DRI2throttleExtension *) extensions[i];
1002
1003       /* DRI2 version 3 is also required because
1004        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1005        */
1006       if (psc->dri2->base.version >= 3
1007           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1008          __glXEnableDirectExtension(&psc->base,
1009                                     "GLX_ARB_create_context_robustness");
1010    }
1011 }
1012
1013 static const struct glx_screen_vtable dri2_screen_vtable = {
1014    dri2_create_context,
1015    dri2_create_context_attribs
1016 };
1017
1018 static struct glx_screen *
1019 dri2CreateScreen(int screen, struct glx_display * priv)
1020 {
1021    const __DRIconfig **driver_configs;
1022    const __DRIextension **extensions;
1023    const struct dri2_display *const pdp = (struct dri2_display *)
1024       priv->dri2Display;
1025    struct dri2_screen *psc;
1026    __GLXDRIscreen *psp;
1027    struct glx_config *configs = NULL, *visuals = NULL;
1028    char *driverName, *deviceName, *tmp;
1029    drm_magic_t magic;
1030    int i;
1031
1032    psc = calloc(1, sizeof *psc);
1033    if (psc == NULL)
1034       return NULL;
1035
1036    psc->fd = -1;
1037
1038    if (!glx_screen_init(&psc->base, screen, priv)) {
1039       free(psc);
1040       return NULL;
1041    }
1042
1043    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1044                     &driverName, &deviceName)) {
1045       glx_screen_cleanup(&psc->base);
1046       free(psc);
1047       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1048       return NULL;
1049    }
1050
1051    psc->driver = driOpenDriver(driverName);
1052    if (psc->driver == NULL) {
1053       ErrorMessageF("driver pointer missing\n");
1054       goto handle_error;
1055    }
1056
1057    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1058    if (extensions == NULL) {
1059       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1060       goto handle_error;
1061    }
1062
1063    for (i = 0; extensions[i]; i++) {
1064       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1065          psc->core = (__DRIcoreExtension *) extensions[i];
1066       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1067          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1068    }
1069
1070    if (psc->core == NULL || psc->dri2 == NULL) {
1071       ErrorMessageF("core dri or dri2 extension not found\n");
1072       goto handle_error;
1073    }
1074
1075 #ifdef O_CLOEXEC
1076    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1077    if (psc->fd == -1 && errno == EINVAL)
1078 #endif
1079    {
1080       psc->fd = open(deviceName, O_RDWR);
1081       if (psc->fd != -1)
1082          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1083    }
1084    if (psc->fd < 0) {
1085       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1086       goto handle_error;
1087    }
1088
1089    if (drmGetMagic(psc->fd, &magic)) {
1090       ErrorMessageF("failed to get magic\n");
1091       goto handle_error;
1092    }
1093
1094    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1095       ErrorMessageF("failed to authenticate magic %d\n", magic);
1096       goto handle_error;
1097    }
1098
1099
1100    /* If the server does not support the protocol for
1101     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1102     */
1103    psc->driScreen =
1104       psc->dri2->createNewScreen(screen, psc->fd,
1105                                  (const __DRIextension **)
1106                                  &pdp->loader_extensions[0],
1107                                  &driver_configs, psc);
1108
1109    if (psc->driScreen == NULL) {
1110       ErrorMessageF("failed to create dri screen\n");
1111       goto handle_error;
1112    }
1113
1114    extensions = psc->core->getExtensions(psc->driScreen);
1115    dri2BindExtensions(psc, extensions);
1116
1117    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1118    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1119
1120    if (!configs || !visuals)
1121        goto handle_error;
1122
1123    glx_config_destroy_list(psc->base.configs);
1124    psc->base.configs = configs;
1125    glx_config_destroy_list(psc->base.visuals);
1126    psc->base.visuals = visuals;
1127
1128    psc->driver_configs = driver_configs;
1129
1130    psc->base.vtable = &dri2_screen_vtable;
1131    psp = &psc->vtable;
1132    psc->base.driScreen = psp;
1133    psp->destroyScreen = dri2DestroyScreen;
1134    psp->createDrawable = dri2CreateDrawable;
1135    psp->swapBuffers = dri2SwapBuffers;
1136    psp->getDrawableMSC = NULL;
1137    psp->waitForMSC = NULL;
1138    psp->waitForSBC = NULL;
1139    psp->setSwapInterval = NULL;
1140    psp->getSwapInterval = NULL;
1141
1142    if (pdp->driMinor >= 2) {
1143 #ifdef X_DRI2GetMSC
1144       psp->getDrawableMSC = dri2DrawableGetMSC;
1145 #endif
1146 #ifdef X_DRI2WaitMSC
1147       psp->waitForMSC = dri2WaitForMSC;
1148 #endif
1149       psp->waitForSBC = dri2WaitForSBC;
1150 #ifdef X_DRI2SwapInterval
1151       psp->setSwapInterval = dri2SetSwapInterval;
1152       psp->getSwapInterval = dri2GetSwapInterval;
1153 #endif
1154 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
1155       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1156 #endif
1157    }
1158
1159    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1160     * available.*/
1161    psp->copySubBuffer = dri2CopySubBuffer;
1162    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1163
1164    free(driverName);
1165    free(deviceName);
1166
1167    tmp = getenv("LIBGL_SHOW_FPS");
1168    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1169
1170    return &psc->base;
1171
1172 handle_error:
1173    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1174
1175    if (configs)
1176        glx_config_destroy_list(configs);
1177    if (visuals)
1178        glx_config_destroy_list(visuals);
1179    if (psc->driScreen)
1180        psc->core->destroyScreen(psc->driScreen);
1181    psc->driScreen = NULL;
1182    if (psc->fd >= 0)
1183       close(psc->fd);
1184    if (psc->driver)
1185       dlclose(psc->driver);
1186
1187    free(driverName);
1188    free(deviceName);
1189    glx_screen_cleanup(&psc->base);
1190    free(psc);
1191
1192    return NULL;
1193 }
1194
1195 /* Called from __glXFreeDisplayPrivate.
1196  */
1197 static void
1198 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1199 {
1200    struct dri2_display *pdp = (struct dri2_display *) dpy;
1201
1202    __glxHashDestroy(pdp->dri2Hash);
1203    free(dpy);
1204 }
1205
1206 _X_HIDDEN __GLXDRIdrawable *
1207 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1208 {
1209    struct glx_display *d = __glXInitialize(dpy);
1210    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1211    __GLXDRIdrawable *pdraw;
1212
1213    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1214       return pdraw;
1215
1216    return NULL;
1217 }
1218
1219 /*
1220  * Allocate, initialize and return a __DRIdisplayPrivate object.
1221  * This is called from __glXInitialize() when we are given a new
1222  * display pointer.
1223  */
1224 _X_HIDDEN __GLXDRIdisplay *
1225 dri2CreateDisplay(Display * dpy)
1226 {
1227    struct dri2_display *pdp;
1228    int eventBase, errorBase, i;
1229
1230    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1231       return NULL;
1232
1233    pdp = malloc(sizeof *pdp);
1234    if (pdp == NULL)
1235       return NULL;
1236
1237    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1238       free(pdp);
1239       return NULL;
1240    }
1241
1242    pdp->driPatch = 0;
1243    pdp->swapAvailable = (pdp->driMinor >= 2);
1244    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1245
1246    pdp->base.destroyDisplay = dri2DestroyDisplay;
1247    pdp->base.createScreen = dri2CreateScreen;
1248
1249    i = 0;
1250    if (pdp->driMinor < 1)
1251       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1252    else
1253       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1254
1255    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1256
1257    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1258
1259    pdp->loader_extensions[i++] = NULL;
1260
1261    pdp->dri2Hash = __glxHashCreate();
1262    if (pdp->dri2Hash == NULL) {
1263       free(pdp);
1264       return NULL;
1265    }
1266
1267    return &pdp->base;
1268 }
1269
1270 #endif /* GLX_DIRECT_RENDERING */