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