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 #ifdef GLX_DIRECT_RENDERING
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/extensions/Xdamage.h>
  38 #include "glapi.h"
  39 #include "glxclient.h"
  40 #include <X11/extensions/dri2proto.h>
  41 #include "xf86dri.h"
  42 #include <dlfcn.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45 #include <sys/types.h>
  46 #include <sys/mman.h>
  47 #include "xf86drm.h"
  48 #include "dri2.h"
  49 #include "dri_common.h"
  50 #include "../../mesa/drivers/dri/common/dri_util.h"
  51
  52 #undef DRI2_MINOR
  53 #define DRI2_MINOR 1
  54
  55 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  56 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  57 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  58
  59 struct __GLXDRIdisplayPrivateRec
  60 {
  61    __GLXDRIdisplay base;
  62
  63    /*
  64     ** XFree86-DRI version information
  65     */
  66    int driMajor;
  67    int driMinor;
  68    int driPatch;
  69    int swapAvailable;
  70    int invalidateAvailable;
  71 };
  72
  73 struct __GLXDRIcontextPrivateRec
  74 {
  75    __GLXDRIcontext base;
  76    __DRIcontext *driContext;
  77    __GLXscreenConfigs *psc;
  78 };
  79
  80 struct __GLXDRIdrawablePrivateRec
  81 {
  82    __GLXDRIdrawable base;
  83    __DRIbuffer buffers[5];
  84    int bufferCount;
  85    int width, height;
  86    int have_back;
  87    int have_fake_front;
  88    int swap_interval;
  89 };
  90
  91 static void dri2WaitX(__GLXDRIdrawable * pdraw);
  92
  93 static void
  94 dri2DestroyContext(__GLXDRIcontext * context,
  95                    __GLXscreenConfigs * psc, Display * dpy)
  96 {
  97    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
  98    const __DRIcoreExtension *core = pcp->psc->core;
  99
 100    (*core->destroyContext) (pcp->driContext);
 101
 102    Xfree(pcp);
 103 }
 104
 105 static Bool
 106 dri2BindContext(__GLXDRIcontext * context,
 107                 __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 108 {
 109    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 110    const __DRIcoreExtension *core = pcp->psc->core;
 111
 112    return (*core->bindContext) (pcp->driContext,
 113                                 draw->driDrawable, read->driDrawable);
 114 }
 115
 116 static void
 117 dri2UnbindContext(__GLXDRIcontext * context)
 118 {
 119    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 120    const __DRIcoreExtension *core = pcp->psc->core;
 121
 122    (*core->unbindContext) (pcp->driContext);
 123 }
 124
 125 static __GLXDRIcontext *
 126 dri2CreateContext(__GLXscreenConfigs * psc,
 127                   const __GLcontextModes * mode,
 128                   GLXContext gc, GLXContext shareList, int renderType)
 129 {
 130    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 131    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 132    __DRIcontext *shared = NULL;
 133
 134    if (shareList) {
 135       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 136       shared = pcp_shared->driContext;
 137    }
 138
 139    pcp = Xmalloc(sizeof *pcp);
 140    if (pcp == NULL)
 141       return NULL;
 142
 143    pcp->psc = psc;
 144    pcp->driContext =
 145       (*psc->dri2->createNewContext) (psc->__driScreen,
 146                                       config->driConfig, shared, pcp);
 147    gc->__driContext = pcp->driContext;
 148
 149    if (pcp->driContext == NULL) {
 150       Xfree(pcp);
 151       return NULL;
 152    }
 153
 154    pcp->base.destroyContext = dri2DestroyContext;
 155    pcp->base.bindContext = dri2BindContext;
 156    pcp->base.unbindContext = dri2UnbindContext;
 157
 158    return &pcp->base;
 159 }
 160
 161 static void
 162 dri2DestroyDrawable(__GLXDRIdrawable * pdraw)
 163 {
 164    const __DRIcoreExtension *core = pdraw->psc->core;
 165
 166    (*core->destroyDrawable) (pdraw->driDrawable);
 167    DRI2DestroyDrawable(pdraw->psc->dpy, pdraw->xDrawable);
 168    Xfree(pdraw);
 169 }
 170
 171 static __GLXDRIdrawable *
 172 dri2CreateDrawable(__GLXscreenConfigs * psc,
 173                    XID xDrawable,
 174                    GLXDrawable drawable, const __GLcontextModes * modes)
 175 {
 176    __GLXDRIdrawablePrivate *pdraw;
 177    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 178
 179    pdraw = Xmalloc(sizeof(*pdraw));
 180    if (!pdraw)
 181       return NULL;
 182
 183    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 184    pdraw->base.xDrawable = xDrawable;
 185    pdraw->base.drawable = drawable;
 186    pdraw->base.psc = psc;
 187    pdraw->bufferCount = 0;
 188    pdraw->swap_interval = 1;
 189
 190    DRI2CreateDrawable(psc->dpy, xDrawable);
 191
 192    /* Create a new drawable */
 193    pdraw->base.driDrawable =
 194       (*psc->dri2->createNewDrawable) (psc->__driScreen,
 195                                        config->driConfig, pdraw);
 196
 197    if (!pdraw->base.driDrawable) {
 198       DRI2DestroyDrawable(psc->dpy, xDrawable);
 199       Xfree(pdraw);
 200       return NULL;
 201    }
 202
 203    /*
 204     * Make sure server has the same swap interval we do for the new
 205     * drawable.
 206     */
 207    DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
 208    return &pdraw->base;
 209 }
 210
 211 #ifdef X_DRI2GetMSC
 212
 213 static int
 214 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 215                    int64_t *ust, int64_t *msc, int64_t *sbc)
 216 {
 217    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 218 }
 219
 220 #endif
 221
 222
 223 #ifdef X_DRI2WaitMSC
 224
 225 static int
 226 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 227                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 228 {
 229    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 230                       remainder, ust, msc, sbc);
 231 }
 232
 233 static int
 234 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 235                int64_t *msc, int64_t *sbc)
 236 {
 237    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 238                       sbc);
 239 }
 240
 241 #endif /* X_DRI2WaitMSC */
 242
 243 static void
 244 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 245 {
 246    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 247    XRectangle xrect;
 248    XserverRegion region;
 249
 250    /* Check we have the right attachments */
 251    if (!priv->have_back)
 252       return;
 253
 254    xrect.x = x;
 255    xrect.y = priv->height - y - height;
 256    xrect.width = width;
 257    xrect.height = height;
 258
 259 #ifdef __DRI2_FLUSH
 260    if (pdraw->psc->f)
 261       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 262 #endif
 263
 264    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 265    /* should get a fence ID back from here at some point */
 266    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 267                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 268    XFixesDestroyRegion(pdraw->psc->dpy, region);
 269
 270    /* Refresh the fake front (if present) after we just damaged the real
 271     * front.
 272     */
 273    dri2WaitX(pdraw);
 274 }
 275
 276 static void
 277 dri2WaitX(__GLXDRIdrawable *pdraw)
 278 {
 279    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 280    XRectangle xrect;
 281    XserverRegion region;
 282
 283    /* Check we have the right attachments */
 284    if (!priv->have_fake_front)
 285       return;
 286
 287    xrect.x = 0;
 288    xrect.y = 0;
 289    xrect.width = priv->width;
 290    xrect.height = priv->height;
 291
 292 #ifdef __DRI2_FLUSH
 293    if (pdraw->psc->f)
 294       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 295 #endif
 296
 297    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 298    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 299                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 300    XFixesDestroyRegion(pdraw->psc->dpy, region);
 301 }
 302
 303 static void
 304 dri2WaitGL(__GLXDRIdrawable * pdraw)
 305 {
 306    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 307    XRectangle xrect;
 308    XserverRegion region;
 309
 310    if (!priv->have_fake_front)
 311       return;
 312
 313    xrect.x = 0;
 314    xrect.y = 0;
 315    xrect.width = priv->width;
 316    xrect.height = priv->height;
 317
 318 #ifdef __DRI2_FLUSH
 319    if (pdraw->psc->f)
 320       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 321 #endif
 322
 323    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 324    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 325                   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 326    XFixesDestroyRegion(pdraw->psc->dpy, region);
 327 }
 328
 329 static void
 330 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 331 {
 332    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 333    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 334    __GLXDRIdisplayPrivate *pdp = (__GLXDRIdisplayPrivate *)priv->dri2Display;
 335
 336    /* Old servers don't send invalidate events */
 337    if (!pdp->invalidateAvailable)
 338        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 339
 340    dri2WaitGL(loaderPrivate);
 341 }
 342
 343
 344 static void
 345 dri2DestroyScreen(__GLXscreenConfigs * psc)
 346 {
 347    /* Free the direct rendering per screen data */
 348    (*psc->core->destroyScreen) (psc->__driScreen);
 349    close(psc->fd);
 350    psc->__driScreen = NULL;
 351 }
 352
 353 /**
 354  * Process list of buffer received from the server
 355  *
 356  * Processes the list of buffers received in a reply from the server to either
 357  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 358  */
 359 static void
 360 process_buffers(__GLXDRIdrawablePrivate * pdraw, DRI2Buffer * buffers,
 361                 unsigned count)
 362 {
 363    int i;
 364
 365    pdraw->bufferCount = count;
 366    pdraw->have_fake_front = 0;
 367    pdraw->have_back = 0;
 368
 369    /* This assumes the DRI2 buffer attachment tokens matches the
 370     * __DRIbuffer tokens. */
 371    for (i = 0; i < count; i++) {
 372       pdraw->buffers[i].attachment = buffers[i].attachment;
 373       pdraw->buffers[i].name = buffers[i].name;
 374       pdraw->buffers[i].pitch = buffers[i].pitch;
 375       pdraw->buffers[i].cpp = buffers[i].cpp;
 376       pdraw->buffers[i].flags = buffers[i].flags;
 377       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 378          pdraw->have_fake_front = 1;
 379       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 380          pdraw->have_back = 1;
 381    }
 382
 383 }
 384
 385 static int64_t
 386 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 387                 int64_t remainder)
 388 {
 389     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 390     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 391     __GLXDRIdisplayPrivate *pdp =
 392         (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;
 393     int64_t ret;
 394
 395 #ifdef __DRI2_FLUSH
 396     if (pdraw->psc->f)
 397         (*pdraw->psc->f->flush)(pdraw->driDrawable);
 398 #endif
 399
 400     /* Old servers don't send invalidate events */
 401     if (!pdp->invalidateAvailable)
 402        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 403
 404     /* Old servers can't handle swapbuffers */
 405     if (!pdp->swapAvailable) {
 406        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 407        return 0;
 408     }
 409
 410 #ifdef X_DRI2SwapBuffers
 411     DRI2SwapBuffers(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 412                     remainder, &ret);
 413 #endif
 414
 415     return ret;
 416 }
 417
 418 static __DRIbuffer *
 419 dri2GetBuffers(__DRIdrawable * driDrawable,
 420                int *width, int *height,
 421                unsigned int *attachments, int count,
 422                int *out_count, void *loaderPrivate)
 423 {
 424    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 425    DRI2Buffer *buffers;
 426
 427    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 428                             width, height, attachments, count, out_count);
 429    if (buffers == NULL)
 430       return NULL;
 431
 432    pdraw->width = *width;
 433    pdraw->height = *height;
 434    process_buffers(pdraw, buffers, *out_count);
 435
 436    Xfree(buffers);
 437
 438    return pdraw->buffers;
 439 }
 440
 441 static __DRIbuffer *
 442 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 443                          int *width, int *height,
 444                          unsigned int *attachments, int count,
 445                          int *out_count, void *loaderPrivate)
 446 {
 447    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 448    DRI2Buffer *buffers;
 449
 450    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 451                                       pdraw->base.xDrawable,
 452                                       width, height, attachments,
 453                                       count, out_count);
 454    if (buffers == NULL)
 455       return NULL;
 456
 457    pdraw->width = *width;
 458    pdraw->height = *height;
 459    process_buffers(pdraw, buffers, *out_count);
 460
 461    Xfree(buffers);
 462
 463    return pdraw->buffers;
 464 }
 465
 466 #ifdef X_DRI2SwapInterval
 467
 468 static void
 469 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 470 {
 471    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 472
 473    DRI2SwapInterval(priv->base.psc->dpy, pdraw->xDrawable, interval);
 474    priv->swap_interval = interval;
 475 }
 476
 477 static unsigned int
 478 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 479 {
 480    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 481
 482   return priv->swap_interval;
 483 }
 484
 485 #endif /* X_DRI2SwapInterval */
 486
 487 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 488    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 489    dri2GetBuffers,
 490    dri2FlushFrontBuffer,
 491    dri2GetBuffersWithFormat,
 492 };
 493
 494 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 495    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 496    dri2GetBuffers,
 497    dri2FlushFrontBuffer,
 498    NULL,
 499 };
 500
 501 static const __DRIextension *loader_extensions[] = {
 502    &dri2LoaderExtension.base,
 503    &systemTimeExtension.base,
 504    NULL
 505 };
 506
 507 static const __DRIextension *loader_extensions_old[] = {
 508    &dri2LoaderExtension_old.base,
 509    &systemTimeExtension.base,
 510    NULL
 511 };
 512
 513 _X_HIDDEN void
 514 dri2InvalidateBuffers(Display *dpy, XID drawable)
 515 {
 516    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 517
 518 #if __DRI2_FLUSH_VERSION >= 3
 519    if (pdraw && pdraw->psc->f)
 520        pdraw->psc->f->invalidate(pdraw->driDrawable);
 521 #endif
 522 }
 523
 524 static __GLXDRIscreen *
 525 dri2CreateScreen(__GLXscreenConfigs * psc, int screen,
 526                  __GLXdisplayPrivate * priv)
 527 {
 528    const __DRIconfig **driver_configs;
 529    const __DRIextension **extensions;
 530    const __GLXDRIdisplayPrivate *const pdp = (__GLXDRIdisplayPrivate *)
 531       priv->dri2Display;
 532    __GLXDRIscreen *psp;
 533    char *driverName, *deviceName;
 534    drm_magic_t magic;
 535    int i;
 536
 537    psp = Xmalloc(sizeof *psp);
 538    if (psp == NULL)
 539       return NULL;
 540
 541    if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 542                     &driverName, &deviceName)) {
 543       XFree(psp);
 544       return NULL;
 545    }
 546
 547    psc->driver = driOpenDriver(driverName);
 548    if (psc->driver == NULL) {
 549       ErrorMessageF("driver pointer missing\n");
 550       goto handle_error;
 551    }
 552
 553    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 554    if (extensions == NULL) {
 555       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 556       goto handle_error;
 557    }
 558
 559    for (i = 0; extensions[i]; i++) {
 560       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 561          psc->core = (__DRIcoreExtension *) extensions[i];
 562       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 563          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 564    }
 565
 566    if (psc->core == NULL || psc->dri2 == NULL) {
 567       ErrorMessageF("core dri or dri2 extension not found\n");
 568       goto handle_error;
 569    }
 570
 571    psc->fd = open(deviceName, O_RDWR);
 572    if (psc->fd < 0) {
 573       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 574       goto handle_error;
 575    }
 576
 577    if (drmGetMagic(psc->fd, &magic)) {
 578       ErrorMessageF("failed to get magic\n");
 579       goto handle_error;
 580    }
 581
 582    if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
 583       ErrorMessageF("failed to authenticate magic %d\n", magic);
 584       goto handle_error;
 585    }
 586
 587    /* If the server does not support the protocol for
 588     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 589     */
 590    psc->__driScreen =
 591       psc->dri2->createNewScreen(screen, psc->fd, ((pdp->driMinor < 1)
 592                                                    ? loader_extensions_old
 593                                                    : loader_extensions),
 594                                  &driver_configs, psc);
 595
 596    if (psc->__driScreen == NULL) {
 597       ErrorMessageF("failed to create dri screen\n");
 598       goto handle_error;
 599    }
 600
 601    driBindCommonExtensions(psc);
 602    dri2BindExtensions(psc);
 603
 604    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 605    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 606
 607    psc->driver_configs = driver_configs;
 608
 609    psp->destroyScreen = dri2DestroyScreen;
 610    psp->createContext = dri2CreateContext;
 611    psp->createDrawable = dri2CreateDrawable;
 612    psp->swapBuffers = dri2SwapBuffers;
 613    psp->waitGL = dri2WaitGL;
 614    psp->waitX = dri2WaitX;
 615    psp->getDrawableMSC = NULL;
 616    psp->waitForMSC = NULL;
 617    psp->waitForSBC = NULL;
 618    psp->setSwapInterval = NULL;
 619    psp->getSwapInterval = NULL;
 620
 621    if (pdp->driMinor >= 2) {
 622 #ifdef X_DRI2GetMSC
 623       psp->getDrawableMSC = dri2DrawableGetMSC;
 624 #endif
 625 #ifdef X_DRI2WaitMSC
 626       psp->waitForMSC = dri2WaitForMSC;
 627       psp->waitForSBC = dri2WaitForSBC;
 628 #endif
 629 #ifdef X_DRI2SwapInterval
 630       psp->setSwapInterval = dri2SetSwapInterval;
 631       psp->getSwapInterval = dri2GetSwapInterval;
 632 #endif
 633 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 634       __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
 635 #endif
 636    }
 637
 638    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 639     * available.*/
 640    psp->copySubBuffer = dri2CopySubBuffer;
 641    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 642
 643    Xfree(driverName);
 644    Xfree(deviceName);
 645
 646    return psp;
 647
 648 handle_error:
 649    Xfree(driverName);
 650    Xfree(deviceName);
 651    XFree(psp);
 652
 653    /* FIXME: clean up here */
 654
 655    return NULL;
 656 }
 657
 658 /* Called from __glXFreeDisplayPrivate.
 659  */
 660 static void
 661 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 662 {
 663    Xfree(dpy);
 664 }
 665
 666 /*
 667  * Allocate, initialize and return a __DRIdisplayPrivate object.
 668  * This is called from __glXInitialize() when we are given a new
 669  * display pointer.
 670  */
 671 _X_HIDDEN __GLXDRIdisplay *
 672 dri2CreateDisplay(Display * dpy)
 673 {
 674    __GLXDRIdisplayPrivate *pdp;
 675    int eventBase, errorBase;
 676
 677    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 678       return NULL;
 679
 680    pdp = Xmalloc(sizeof *pdp);
 681    if (pdp == NULL)
 682       return NULL;
 683
 684    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 685       Xfree(pdp);
 686       return NULL;
 687    }
 688
 689    pdp->driPatch = 0;
 690    pdp->swapAvailable = (pdp->driMinor >= 2);
 691    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 692
 693    pdp->base.destroyDisplay = dri2DestroyDisplay;
 694    pdp->base.createScreen = dri2CreateScreen;
 695
 696    return &pdp->base;
 697 }
 698
 699 #endif /* GLX_DIRECT_RENDERING */