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 "glapi.h"
  38 #include "glxclient.h"
  39 #include <X11/extensions/dri2proto.h>
  40 #include "xf86dri.h"
  41 #include <dlfcn.h>
  42 #include <fcntl.h>
  43 #include <unistd.h>
  44 #include <sys/types.h>
  45 #include <sys/mman.h>
  46 #include <sys/time.h>
  47 #include "xf86drm.h"
  48 #include "dri2.h"
  49 #include "dri_common.h"
  50
  51 /* From xmlpool/options.h, user exposed so should be stable */
  52 #define DRI_CONF_VBLANK_NEVER 0
  53 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  54 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  55 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  56
  57 #undef DRI2_MINOR
  58 #define DRI2_MINOR 1
  59
  60 struct dri2_display
  61 {
  62    __GLXDRIdisplay base;
  63
  64    /*
  65     ** XFree86-DRI version information
  66     */
  67    int driMajor;
  68    int driMinor;
  69    int driPatch;
  70    int swapAvailable;
  71    int invalidateAvailable;
  72
  73    __glxHashTable *dri2Hash;
  74
  75    const __DRIextension *loader_extensions[4];
  76 };
  77
  78 struct dri2_screen {
  79    struct glx_screen base;
  80
  81    __DRIscreen *driScreen;
  82    __GLXDRIscreen vtable;
  83    const __DRIdri2Extension *dri2;
  84    const __DRIcoreExtension *core;
  85
  86    const __DRI2flushExtension *f;
  87    const __DRI2configQueryExtension *config;
  88    const __DRItexBufferExtension *texBuffer;
  89    const __DRI2throttleExtension *throttle;
  90    const __DRIconfig **driver_configs;
  91
  92    void *driver;
  93    int fd;
  94
  95    Bool show_fps;
  96 };
  97
  98 struct dri2_context
  99 {
 100    struct glx_context base;
 101    __DRIcontext *driContext;
 102 };
 103
 104 struct dri2_drawable
 105 {
 106    __GLXDRIdrawable base;
 107    __DRIdrawable *driDrawable;
 108    __DRIbuffer buffers[5];
 109    int bufferCount;
 110    int width, height;
 111    int have_back;
 112    int have_fake_front;
 113    int swap_interval;
 114
 115    double previous_time;
 116    unsigned frames;
 117 };
 118
 119 static const struct glx_context_vtable dri2_context_vtable;
 120
 121 static void
 122 dri2_destroy_context(struct glx_context *context)
 123 {
 124    struct dri2_context *pcp = (struct dri2_context *) context;
 125    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 126
 127    driReleaseDrawables(&pcp->base);
 128
 129    if (context->extensions)
 130       XFree((char *) context->extensions);
 131
 132    (*psc->core->destroyContext) (pcp->driContext);
 133
 134    Xfree(pcp);
 135 }
 136
 137 static Bool
 138 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 139                   GLXDrawable draw, GLXDrawable read)
 140 {
 141    struct dri2_context *pcp = (struct dri2_context *) context;
 142    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 143    struct dri2_drawable *pdraw, *pread;
 144    struct dri2_display *pdp;
 145
 146    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 147    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 148
 149    driReleaseDrawables(&pcp->base);
 150
 151    if (pdraw == NULL || pread == NULL)
 152       return GLXBadDrawable;
 153
 154    if (!(*psc->core->bindContext) (pcp->driContext,
 155                                    pdraw->driDrawable, pread->driDrawable))
 156       return GLXBadContext;
 157
 158    /* If the server doesn't send invalidate events, we may miss a
 159     * resize before the rendering starts.  Invalidate the buffers now
 160     * so the driver will recheck before rendering starts. */
 161    pdp = (struct dri2_display *) psc->base.display;
 162    if (!pdp->invalidateAvailable) {
 163       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 164       if (pread != pdraw)
 165          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 166    }
 167
 168    return Success;
 169 }
 170
 171 static void
 172 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 173 {
 174    struct dri2_context *pcp = (struct dri2_context *) context;
 175    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 176
 177    (*psc->core->unbindContext) (pcp->driContext);
 178 }
 179
 180 static struct glx_context *
 181 dri2_create_context(struct glx_screen *base,
 182                     struct glx_config *config_base,
 183                     struct glx_context *shareList, int renderType)
 184 {
 185    struct dri2_context *pcp, *pcp_shared;
 186    struct dri2_screen *psc = (struct dri2_screen *) base;
 187    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 188    __DRIcontext *shared = NULL;
 189
 190    if (shareList) {
 191       /* If the shareList context is not a DRI2 context, we cannot possibly
 192        * create a DRI2 context that shares it.
 193        */
 194       if (shareList->vtable->destroy != dri2_destroy_context) {
 195          return NULL;
 196       }
 197
 198       pcp_shared = (struct dri2_context *) shareList;
 199       shared = pcp_shared->driContext;
 200    }
 201
 202    pcp = Xmalloc(sizeof *pcp);
 203    if (pcp == NULL)
 204       return NULL;
 205
 206    memset(pcp, 0, sizeof *pcp);
 207    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 208       Xfree(pcp);
 209       return NULL;
 210    }
 211
 212    pcp->driContext =
 213       (*psc->dri2->createNewContext) (psc->driScreen,
 214                                       config->driConfig, shared, pcp);
 215
 216    if (pcp->driContext == NULL) {
 217       Xfree(pcp);
 218       return NULL;
 219    }
 220
 221    pcp->base.vtable = &dri2_context_vtable;
 222
 223    return &pcp->base;
 224 }
 225
 226 static struct glx_context *
 227 dri2_create_context_attribs(struct glx_screen *base,
 228                             struct glx_config *config_base,
 229                             struct glx_context *shareList,
 230                             unsigned num_attribs,
 231                             const uint32_t *attribs,
 232                             unsigned *error)
 233 {
 234    struct dri2_context *pcp = NULL;
 235    struct dri2_context *pcp_shared = NULL;
 236    struct dri2_screen *psc = (struct dri2_screen *) base;
 237    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 238    __DRIcontext *shared = NULL;
 239
 240    uint32_t minor_ver = 1;
 241    uint32_t major_ver = 2;
 242    uint32_t flags = 0;
 243    unsigned api;
 244    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 245    uint32_t ctx_attribs[2 * 5];
 246    unsigned num_ctx_attribs = 0;
 247
 248    if (psc->dri2->base.version < 3) {
 249       *error = __DRI_CTX_ERROR_NO_MEMORY;
 250       goto error_exit;
 251    }
 252
 253    /* Remap the GLX tokens to DRI2 tokens.
 254     */
 255    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 256                                  &major_ver, &minor_ver, &flags, &api, &reset,
 257                                  error))
 258       goto error_exit;
 259
 260    if (shareList) {
 261       pcp_shared = (struct dri2_context *) shareList;
 262       shared = pcp_shared->driContext;
 263    }
 264
 265    pcp = Xmalloc(sizeof *pcp);
 266    if (pcp == NULL) {
 267       *error = __DRI_CTX_ERROR_NO_MEMORY;
 268       goto error_exit;
 269    }
 270
 271    memset(pcp, 0, sizeof *pcp);
 272    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 273       goto error_exit;
 274
 275    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 276    ctx_attribs[num_ctx_attribs++] = major_ver;
 277    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 278    ctx_attribs[num_ctx_attribs++] = minor_ver;
 279
 280    /* Only send a value when the non-default value is requested.  By doing
 281     * this we don't have to check the driver's DRI2 version before sending the
 282     * default value.
 283     */
 284    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 285       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 286       ctx_attribs[num_ctx_attribs++] = reset;
 287    }
 288
 289    if (flags != 0) {
 290       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 291
 292       /* The current __DRI_CTX_FLAG_* values are identical to the
 293        * GLX_CONTEXT_*_BIT values.
 294        */
 295       ctx_attribs[num_ctx_attribs++] = flags;
 296    }
 297
 298    pcp->driContext =
 299       (*psc->dri2->createContextAttribs) (psc->driScreen,
 300                                           api,
 301                                           config->driConfig,
 302                                           shared,
 303                                           num_ctx_attribs / 2,
 304                                           ctx_attribs,
 305                                           error,
 306                                           pcp);
 307
 308    if (pcp->driContext == NULL)
 309       goto error_exit;
 310
 311    pcp->base.vtable = &dri2_context_vtable;
 312
 313    return &pcp->base;
 314
 315 error_exit:
 316    if (pcp != NULL)
 317       Xfree(pcp);
 318
 319    return NULL;
 320 }
 321
 322 static void
 323 dri2DestroyDrawable(__GLXDRIdrawable *base)
 324 {
 325    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 326    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 327    struct glx_display *dpyPriv = psc->base.display;
 328    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 329
 330    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 331    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 332
 333    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 334     * now, as the application explicitly asked to destroy the GLX
 335     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 336     * drawable linger on the server, since there's no good way of
 337     * knowing when the application is done with it.  The server will
 338     * destroy the DRI2 drawable when it destroys the X drawable or the
 339     * client exits anyway. */
 340    if (pdraw->base.xDrawable != pdraw->base.drawable)
 341       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 342
 343    Xfree(pdraw);
 344 }
 345
 346 static __GLXDRIdrawable *
 347 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 348                    GLXDrawable drawable, struct glx_config *config_base)
 349 {
 350    struct dri2_drawable *pdraw;
 351    struct dri2_screen *psc = (struct dri2_screen *) base;
 352    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 353    struct glx_display *dpyPriv;
 354    struct dri2_display *pdp;
 355    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 356
 357    pdraw = Xmalloc(sizeof(*pdraw));
 358    if (!pdraw)
 359       return NULL;
 360
 361    memset(pdraw, 0, sizeof *pdraw);
 362    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 363    pdraw->base.xDrawable = xDrawable;
 364    pdraw->base.drawable = drawable;
 365    pdraw->base.psc = &psc->base;
 366    pdraw->bufferCount = 0;
 367    pdraw->swap_interval = 1; /* default may be overridden below */
 368    pdraw->have_back = 0;
 369
 370    if (psc->config)
 371       psc->config->configQueryi(psc->driScreen,
 372                                 "vblank_mode", &vblank_mode);
 373
 374    switch (vblank_mode) {
 375    case DRI_CONF_VBLANK_NEVER:
 376    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 377       pdraw->swap_interval = 0;
 378       break;
 379    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 380    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 381    default:
 382       pdraw->swap_interval = 1;
 383       break;
 384    }
 385
 386    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 387
 388    dpyPriv = __glXInitialize(psc->base.dpy);
 389    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 390    /* Create a new drawable */
 391    pdraw->driDrawable =
 392       (*psc->dri2->createNewDrawable) (psc->driScreen,
 393                                        config->driConfig, pdraw);
 394
 395    if (!pdraw->driDrawable) {
 396       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 397       Xfree(pdraw);
 398       return NULL;
 399    }
 400
 401    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 402       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 403       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 404       Xfree(pdraw);
 405       return None;
 406    }
 407
 408
 409 #ifdef X_DRI2SwapInterval
 410    /*
 411     * Make sure server has the same swap interval we do for the new
 412     * drawable.
 413     */
 414    if (pdp->swapAvailable)
 415       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 416 #endif
 417
 418    return &pdraw->base;
 419 }
 420
 421 #ifdef X_DRI2GetMSC
 422
 423 static int
 424 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 425                    int64_t *ust, int64_t *msc, int64_t *sbc)
 426 {
 427    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 428    int ret;
 429
 430    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 431                     &dri2_ust, &dri2_msc, &dri2_sbc);
 432    *ust = dri2_ust;
 433    *msc = dri2_msc;
 434    *sbc = dri2_sbc;
 435
 436    return ret;
 437 }
 438
 439 #endif
 440
 441
 442 #ifdef X_DRI2WaitMSC
 443
 444 static int
 445 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 446                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 447 {
 448    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 449    int ret;
 450
 451    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 452                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 453    *ust = dri2_ust;
 454    *msc = dri2_msc;
 455    *sbc = dri2_sbc;
 456
 457    return ret;
 458 }
 459
 460 static int
 461 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 462                int64_t *msc, int64_t *sbc)
 463 {
 464    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 465    int ret;
 466
 467    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 468                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 469    *ust = dri2_ust;
 470    *msc = dri2_msc;
 471    *sbc = dri2_sbc;
 472
 473    return ret;
 474 }
 475
 476 #endif /* X_DRI2WaitMSC */
 477
 478 /**
 479  * dri2Throttle - Request driver throttling
 480  *
 481  * This function uses the DRI2 throttle extension to give the
 482  * driver the opportunity to throttle on flush front, copysubbuffer
 483  * and swapbuffers.
 484  */
 485 static void
 486 dri2Throttle(struct dri2_screen *psc,
 487              struct dri2_drawable *draw,
 488              enum __DRI2throttleReason reason)
 489 {
 490    if (psc->throttle) {
 491       struct glx_context *gc = __glXGetCurrentContext();
 492       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 493       __DRIcontext *ctx =
 494          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 495
 496       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 497    }
 498 }
 499
 500 static void
 501 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 502                     int width, int height,
 503                     enum __DRI2throttleReason reason)
 504 {
 505    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 506    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 507    XRectangle xrect;
 508    XserverRegion region;
 509
 510    /* Check we have the right attachments */
 511    if (!priv->have_back)
 512       return;
 513
 514    xrect.x = x;
 515    xrect.y = priv->height - y - height;
 516    xrect.width = width;
 517    xrect.height = height;
 518
 519 #ifdef __DRI2_FLUSH
 520    if (psc->f)
 521       (*psc->f->flush) (priv->driDrawable);
 522 #endif
 523
 524    dri2Throttle(psc, priv, reason);
 525
 526    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 527    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 528                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 529
 530    /* Refresh the fake front (if present) after we just damaged the real
 531     * front.
 532     */
 533    if (priv->have_fake_front)
 534       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 535                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 536
 537    XFixesDestroyRegion(psc->base.dpy, region);
 538 }
 539
 540 static void
 541 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 542                   int width, int height)
 543 {
 544    __dri2CopySubBuffer(pdraw, x, y, width, height,
 545                        __DRI2_THROTTLE_COPYSUBBUFFER);
 546 }
 547
 548
 549 static void
 550 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 551 {
 552    XRectangle xrect;
 553    XserverRegion region;
 554    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 555
 556    xrect.x = 0;
 557    xrect.y = 0;
 558    xrect.width = priv->width;
 559    xrect.height = priv->height;
 560
 561 #ifdef __DRI2_FLUSH
 562    if (psc->f)
 563       (*psc->f->flush) (priv->driDrawable);
 564 #endif
 565
 566    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 567    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 568    XFixesDestroyRegion(psc->base.dpy, region);
 569
 570 }
 571
 572 static void
 573 dri2_wait_x(struct glx_context *gc)
 574 {
 575    struct dri2_drawable *priv = (struct dri2_drawable *)
 576       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 577
 578    if (priv == NULL || !priv->have_fake_front)
 579       return;
 580
 581    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 582 }
 583
 584 static void
 585 dri2_wait_gl(struct glx_context *gc)
 586 {
 587    struct dri2_drawable *priv = (struct dri2_drawable *)
 588       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 589
 590    if (priv == NULL || !priv->have_fake_front)
 591       return;
 592
 593    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 594 }
 595
 596 static void
 597 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 598 {
 599    struct glx_display *priv;
 600    struct dri2_display *pdp;
 601    struct glx_context *gc;
 602    struct dri2_drawable *pdraw = loaderPrivate;
 603    struct dri2_screen *psc;
 604
 605    if (!pdraw)
 606       return;
 607
 608    if (!pdraw->base.psc)
 609       return;
 610
 611    psc = (struct dri2_screen *) pdraw->base.psc;
 612
 613    priv = __glXInitialize(psc->base.dpy);
 614    pdp = (struct dri2_display *) priv->dri2Display;
 615    gc = __glXGetCurrentContext();
 616
 617    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 618
 619    /* Old servers don't send invalidate events */
 620    if (!pdp->invalidateAvailable)
 621        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 622
 623    dri2_wait_gl(gc);
 624 }
 625
 626
 627 static void
 628 dri2DestroyScreen(struct glx_screen *base)
 629 {
 630    struct dri2_screen *psc = (struct dri2_screen *) base;
 631
 632    /* Free the direct rendering per screen data */
 633    (*psc->core->destroyScreen) (psc->driScreen);
 634    driDestroyConfigs(psc->driver_configs);
 635    close(psc->fd);
 636    Xfree(psc);
 637 }
 638
 639 /**
 640  * Process list of buffer received from the server
 641  *
 642  * Processes the list of buffers received in a reply from the server to either
 643  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 644  */
 645 static void
 646 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 647                 unsigned count)
 648 {
 649    int i;
 650
 651    pdraw->bufferCount = count;
 652    pdraw->have_fake_front = 0;
 653    pdraw->have_back = 0;
 654
 655    /* This assumes the DRI2 buffer attachment tokens matches the
 656     * __DRIbuffer tokens. */
 657    for (i = 0; i < count; i++) {
 658       pdraw->buffers[i].attachment = buffers[i].attachment;
 659       pdraw->buffers[i].name = buffers[i].name;
 660       pdraw->buffers[i].pitch = buffers[i].pitch;
 661       pdraw->buffers[i].cpp = buffers[i].cpp;
 662       pdraw->buffers[i].flags = buffers[i].flags;
 663       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 664          pdraw->have_fake_front = 1;
 665       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 666          pdraw->have_back = 1;
 667    }
 668
 669 }
 670
 671 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 672 {
 673       struct glx_display *glx_dpy = __glXInitialize(dpy);
 674       __GLXDRIdrawable *pdraw;
 675       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 676       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 677          return 0;
 678       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 679 }
 680
 681 static void show_fps(struct dri2_drawable *draw)
 682 {
 683    struct timeval tv;
 684    double current_time;
 685
 686    gettimeofday(&tv, 0);
 687    current_time = (double)tv.tv_sec + (double)tv.tv_usec * 0.000001;
 688
 689    draw->frames++;
 690
 691    if (draw->previous_time + 1 < current_time) {
 692       if (draw->previous_time) {
 693          fprintf(stderr, "libGL: FPS = %.1f\n",
 694                  draw->frames / (current_time - draw->previous_time));
 695       }
 696       draw->frames = 0;
 697       draw->previous_time = current_time;
 698    }
 699 }
 700
 701 static int64_t
 702 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 703                 int64_t remainder)
 704 {
 705     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 706     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 707     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 708     struct dri2_display *pdp =
 709         (struct dri2_display *)dpyPriv->dri2Display;
 710     CARD64 ret = 0;
 711
 712     /* Check we have the right attachments */
 713     if (!priv->have_back)
 714         return ret;
 715
 716     /* Old servers can't handle swapbuffers */
 717     if (!pdp->swapAvailable) {
 718        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 719                            __DRI2_THROTTLE_SWAPBUFFER);
 720     } else {
 721 #ifdef X_DRI2SwapBuffers
 722 #ifdef __DRI2_FLUSH
 723     if (psc->f) {
 724        struct glx_context *gc = __glXGetCurrentContext();
 725
 726        if (gc) {
 727           (*psc->f->flush)(priv->driDrawable);
 728        }
 729     }
 730 #endif
 731
 732        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 733
 734        DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable,
 735                        target_msc, divisor, remainder, &ret);
 736 #endif
 737     }
 738
 739     if (psc->show_fps) {
 740        show_fps(priv);
 741     }
 742
 743     /* Old servers don't send invalidate events */
 744     if (!pdp->invalidateAvailable)
 745        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 746
 747     return ret;
 748 }
 749
 750 static __DRIbuffer *
 751 dri2GetBuffers(__DRIdrawable * driDrawable,
 752                int *width, int *height,
 753                unsigned int *attachments, int count,
 754                int *out_count, void *loaderPrivate)
 755 {
 756    struct dri2_drawable *pdraw = loaderPrivate;
 757    DRI2Buffer *buffers;
 758
 759    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 760                             width, height, attachments, count, out_count);
 761    if (buffers == NULL)
 762       return NULL;
 763
 764    pdraw->width = *width;
 765    pdraw->height = *height;
 766    process_buffers(pdraw, buffers, *out_count);
 767
 768    Xfree(buffers);
 769
 770    return pdraw->buffers;
 771 }
 772
 773 static __DRIbuffer *
 774 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 775                          int *width, int *height,
 776                          unsigned int *attachments, int count,
 777                          int *out_count, void *loaderPrivate)
 778 {
 779    struct dri2_drawable *pdraw = loaderPrivate;
 780    DRI2Buffer *buffers;
 781
 782    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 783                                       pdraw->base.xDrawable,
 784                                       width, height, attachments,
 785                                       count, out_count);
 786    if (buffers == NULL)
 787       return NULL;
 788
 789    pdraw->width = *width;
 790    pdraw->height = *height;
 791    process_buffers(pdraw, buffers, *out_count);
 792
 793    Xfree(buffers);
 794
 795    return pdraw->buffers;
 796 }
 797
 798 #ifdef X_DRI2SwapInterval
 799
 800 static int
 801 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 802 {
 803    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 804    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 805    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 806
 807    if (psc->config)
 808       psc->config->configQueryi(psc->driScreen,
 809                                 "vblank_mode", &vblank_mode);
 810
 811    switch (vblank_mode) {
 812    case DRI_CONF_VBLANK_NEVER:
 813       return GLX_BAD_VALUE;
 814    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 815       if (interval <= 0)
 816          return GLX_BAD_VALUE;
 817       break;
 818    default:
 819       break;
 820    }
 821
 822    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 823    priv->swap_interval = interval;
 824
 825    return 0;
 826 }
 827
 828 static int
 829 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 830 {
 831    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 832
 833   return priv->swap_interval;
 834 }
 835
 836 #endif /* X_DRI2SwapInterval */
 837
 838 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 839    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 840    dri2GetBuffers,
 841    dri2FlushFrontBuffer,
 842    dri2GetBuffersWithFormat,
 843 };
 844
 845 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 846    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 847    dri2GetBuffers,
 848    dri2FlushFrontBuffer,
 849    NULL,
 850 };
 851
 852 #ifdef __DRI_USE_INVALIDATE
 853 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 854    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 855 };
 856 #endif
 857
 858 _X_HIDDEN void
 859 dri2InvalidateBuffers(Display *dpy, XID drawable)
 860 {
 861    __GLXDRIdrawable *pdraw =
 862       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 863    struct dri2_screen *psc;
 864    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 865
 866    if (!pdraw)
 867       return;
 868
 869    psc = (struct dri2_screen *) pdraw->psc;
 870
 871 #if __DRI2_FLUSH_VERSION >= 3
 872    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 873        psc->f->invalidate(pdp->driDrawable);
 874 #endif
 875 }
 876
 877 static void
 878 dri2_bind_tex_image(Display * dpy,
 879                     GLXDrawable drawable,
 880                     int buffer, const int *attrib_list)
 881 {
 882    struct glx_context *gc = __glXGetCurrentContext();
 883    struct dri2_context *pcp = (struct dri2_context *) gc;
 884    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 885    struct glx_display *dpyPriv = __glXInitialize(dpy);
 886    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 887    struct dri2_display *pdp =
 888       (struct dri2_display *) dpyPriv->dri2Display;
 889    struct dri2_screen *psc;
 890
 891    if (pdraw != NULL) {
 892       psc = (struct dri2_screen *) base->psc;
 893
 894 #if __DRI2_FLUSH_VERSION >= 3
 895       if (!pdp->invalidateAvailable && psc->f &&
 896            psc->f->base.version >= 3 && psc->f->invalidate)
 897          psc->f->invalidate(pdraw->driDrawable);
 898 #endif
 899
 900       if (psc->texBuffer->base.version >= 2 &&
 901           psc->texBuffer->setTexBuffer2 != NULL) {
 902          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 903                                            pdraw->base.textureTarget,
 904                                            pdraw->base.textureFormat,
 905                                            pdraw->driDrawable);
 906       }
 907       else {
 908          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 909                                           pdraw->base.textureTarget,
 910                                           pdraw->driDrawable);
 911       }
 912    }
 913 }
 914
 915 static void
 916 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 917 {
 918 #if __DRI_TEX_BUFFER_VERSION >= 3
 919    struct glx_context *gc = __glXGetCurrentContext();
 920    struct dri2_context *pcp = (struct dri2_context *) gc;
 921    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 922    struct glx_display *dpyPriv = __glXInitialize(dpy);
 923    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 924    struct dri2_display *pdp =
 925       (struct dri2_display *) dpyPriv->dri2Display;
 926    struct dri2_screen *psc;
 927
 928    if (pdraw != NULL) {
 929       psc = (struct dri2_screen *) base->psc;
 930
 931       if (psc->texBuffer->base.version >= 3 &&
 932           psc->texBuffer->releaseTexBuffer != NULL) {
 933          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 934                                            pdraw->base.textureTarget,
 935                                            pdraw->driDrawable);
 936       }
 937    }
 938 #endif
 939 }
 940
 941 static const struct glx_context_vtable dri2_context_vtable = {
 942    dri2_destroy_context,
 943    dri2_bind_context,
 944    dri2_unbind_context,
 945    dri2_wait_gl,
 946    dri2_wait_x,
 947    DRI_glXUseXFont,
 948    dri2_bind_tex_image,
 949    dri2_release_tex_image,
 950    NULL, /* get_proc_address */
 951 };
 952
 953 static void
 954 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 955 {
 956    int i;
 957
 958    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 959    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 960    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 961    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 962
 963    /* FIXME: if DRI2 version supports it... */
 964    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 965
 966    if (psc->dri2->base.version >= 3) {
 967       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
 968
 969       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 970       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 971
 972       if ((mask & (1 << __DRI_API_GLES2)) != 0)
 973          __glXEnableDirectExtension(&psc->base,
 974                                     "GLX_EXT_create_context_es2_profile");
 975    }
 976
 977    for (i = 0; extensions[i]; i++) {
 978       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 979          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 980          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 981       }
 982
 983       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 984          psc->f = (__DRI2flushExtension *) extensions[i];
 985          /* internal driver extension, no GL extension exposed */
 986       }
 987
 988       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 989          psc->config = (__DRI2configQueryExtension *) extensions[i];
 990
 991       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
 992          psc->throttle = (__DRI2throttleExtension *) extensions[i];
 993
 994       /* DRI2 version 3 is also required because
 995        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
 996        */
 997       if (psc->dri2->base.version >= 3
 998           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 999          __glXEnableDirectExtension(&psc->base,
1000                                     "GLX_ARB_create_context_robustness");
1001    }
1002 }
1003
1004 static const struct glx_screen_vtable dri2_screen_vtable = {
1005    dri2_create_context,
1006    dri2_create_context_attribs
1007 };
1008
1009 static struct glx_screen *
1010 dri2CreateScreen(int screen, struct glx_display * priv)
1011 {
1012    const __DRIconfig **driver_configs;
1013    const __DRIextension **extensions;
1014    const struct dri2_display *const pdp = (struct dri2_display *)
1015       priv->dri2Display;
1016    struct dri2_screen *psc;
1017    __GLXDRIscreen *psp;
1018    struct glx_config *configs = NULL, *visuals = NULL;
1019    char *driverName, *deviceName, *tmp;
1020    drm_magic_t magic;
1021    int i;
1022
1023    psc = Xmalloc(sizeof *psc);
1024    if (psc == NULL)
1025       return NULL;
1026
1027    memset(psc, 0, sizeof *psc);
1028    psc->fd = -1;
1029
1030    if (!glx_screen_init(&psc->base, screen, priv)) {
1031       Xfree(psc);
1032       return NULL;
1033    }
1034
1035    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1036                     &driverName, &deviceName)) {
1037       glx_screen_cleanup(&psc->base);
1038       XFree(psc);
1039       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1040       return NULL;
1041    }
1042
1043    psc->driver = driOpenDriver(driverName);
1044    if (psc->driver == NULL) {
1045       ErrorMessageF("driver pointer missing\n");
1046       goto handle_error;
1047    }
1048
1049    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1050    if (extensions == NULL) {
1051       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1052       goto handle_error;
1053    }
1054
1055    for (i = 0; extensions[i]; i++) {
1056       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1057          psc->core = (__DRIcoreExtension *) extensions[i];
1058       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1059          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1060    }
1061
1062    if (psc->core == NULL || psc->dri2 == NULL) {
1063       ErrorMessageF("core dri or dri2 extension not found\n");
1064       goto handle_error;
1065    }
1066
1067 #ifdef O_CLOEXEC
1068    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1069    if (psc->fd == -1 && errno == EINVAL)
1070 #endif
1071    {
1072       psc->fd = open(deviceName, O_RDWR);
1073       if (psc->fd != -1)
1074          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1075    }
1076    if (psc->fd < 0) {
1077       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1078       goto handle_error;
1079    }
1080
1081    if (drmGetMagic(psc->fd, &magic)) {
1082       ErrorMessageF("failed to get magic\n");
1083       goto handle_error;
1084    }
1085
1086    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1087       ErrorMessageF("failed to authenticate magic %d\n", magic);
1088       goto handle_error;
1089    }
1090
1091
1092    /* If the server does not support the protocol for
1093     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1094     */
1095    psc->driScreen =
1096       psc->dri2->createNewScreen(screen, psc->fd,
1097                                  (const __DRIextension **)
1098                                  &pdp->loader_extensions[0],
1099                                  &driver_configs, psc);
1100
1101    if (psc->driScreen == NULL) {
1102       ErrorMessageF("failed to create dri screen\n");
1103       goto handle_error;
1104    }
1105
1106    extensions = psc->core->getExtensions(psc->driScreen);
1107    dri2BindExtensions(psc, extensions);
1108
1109    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1110    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1111
1112    if (!configs || !visuals)
1113        goto handle_error;
1114
1115    glx_config_destroy_list(psc->base.configs);
1116    psc->base.configs = configs;
1117    glx_config_destroy_list(psc->base.visuals);
1118    psc->base.visuals = visuals;
1119
1120    psc->driver_configs = driver_configs;
1121
1122    psc->base.vtable = &dri2_screen_vtable;
1123    psp = &psc->vtable;
1124    psc->base.driScreen = psp;
1125    psp->destroyScreen = dri2DestroyScreen;
1126    psp->createDrawable = dri2CreateDrawable;
1127    psp->swapBuffers = dri2SwapBuffers;
1128    psp->getDrawableMSC = NULL;
1129    psp->waitForMSC = NULL;
1130    psp->waitForSBC = NULL;
1131    psp->setSwapInterval = NULL;
1132    psp->getSwapInterval = NULL;
1133
1134    if (pdp->driMinor >= 2) {
1135 #ifdef X_DRI2GetMSC
1136       psp->getDrawableMSC = dri2DrawableGetMSC;
1137 #endif
1138 #ifdef X_DRI2WaitMSC
1139       psp->waitForMSC = dri2WaitForMSC;
1140       psp->waitForSBC = dri2WaitForSBC;
1141 #endif
1142 #ifdef X_DRI2SwapInterval
1143       psp->setSwapInterval = dri2SetSwapInterval;
1144       psp->getSwapInterval = dri2GetSwapInterval;
1145 #endif
1146 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
1147       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1148 #endif
1149    }
1150
1151    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1152     * available.*/
1153    psp->copySubBuffer = dri2CopySubBuffer;
1154    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1155
1156    Xfree(driverName);
1157    Xfree(deviceName);
1158
1159    tmp = getenv("LIBGL_SHOW_FPS");
1160    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1161
1162    return &psc->base;
1163
1164 handle_error:
1165    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1166
1167    if (configs)
1168        glx_config_destroy_list(configs);
1169    if (visuals)
1170        glx_config_destroy_list(visuals);
1171    if (psc->driScreen)
1172        psc->core->destroyScreen(psc->driScreen);
1173    psc->driScreen = NULL;
1174    if (psc->fd >= 0)
1175       close(psc->fd);
1176    if (psc->driver)
1177       dlclose(psc->driver);
1178
1179    Xfree(driverName);
1180    Xfree(deviceName);
1181    glx_screen_cleanup(&psc->base);
1182    XFree(psc);
1183
1184    return NULL;
1185 }
1186
1187 /* Called from __glXFreeDisplayPrivate.
1188  */
1189 static void
1190 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1191 {
1192    struct dri2_display *pdp = (struct dri2_display *) dpy;
1193
1194    __glxHashDestroy(pdp->dri2Hash);
1195    Xfree(dpy);
1196 }
1197
1198 _X_HIDDEN __GLXDRIdrawable *
1199 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1200 {
1201    struct glx_display *d = __glXInitialize(dpy);
1202    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1203    __GLXDRIdrawable *pdraw;
1204
1205    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1206       return pdraw;
1207
1208    return NULL;
1209 }
1210
1211 /*
1212  * Allocate, initialize and return a __DRIdisplayPrivate object.
1213  * This is called from __glXInitialize() when we are given a new
1214  * display pointer.
1215  */
1216 _X_HIDDEN __GLXDRIdisplay *
1217 dri2CreateDisplay(Display * dpy)
1218 {
1219    struct dri2_display *pdp;
1220    int eventBase, errorBase, i;
1221
1222    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1223       return NULL;
1224
1225    pdp = Xmalloc(sizeof *pdp);
1226    if (pdp == NULL)
1227       return NULL;
1228
1229    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1230       Xfree(pdp);
1231       return NULL;
1232    }
1233
1234    pdp->driPatch = 0;
1235    pdp->swapAvailable = (pdp->driMinor >= 2);
1236    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1237
1238    pdp->base.destroyDisplay = dri2DestroyDisplay;
1239    pdp->base.createScreen = dri2CreateScreen;
1240
1241    i = 0;
1242    if (pdp->driMinor < 1)
1243       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1244    else
1245       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1246
1247    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1248
1249 #ifdef __DRI_USE_INVALIDATE
1250    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1251 #endif
1252    pdp->loader_extensions[i++] = NULL;
1253
1254    pdp->dri2Hash = __glxHashCreate();
1255    if (pdp->dri2Hash == NULL) {
1256       Xfree(pdp);
1257       return NULL;
1258    }
1259
1260    return &pdp->base;
1261 }
1262
1263 #endif /* GLX_DIRECT_RENDERING */