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
 189    DRI2CreateDrawable(psc->dpy, xDrawable);
 190
 191    /* Create a new drawable */
 192    pdraw->base.driDrawable =
 193       (*psc->dri2->createNewDrawable) (psc->__driScreen,
 194                                        config->driConfig, pdraw);
 195
 196    if (!pdraw->base.driDrawable) {
 197       DRI2DestroyDrawable(psc->dpy, xDrawable);
 198       Xfree(pdraw);
 199       return NULL;
 200    }
 201
 202    return &pdraw->base;
 203 }
 204
 205 static int
 206 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 207                    int64_t *ust, int64_t *msc, int64_t *sbc)
 208 {
 209    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 210 }
 211
 212 static int
 213 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 214                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 215 {
 216    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 217                       remainder, ust, msc, sbc);
 218 }
 219
 220 static int
 221 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 222                int64_t *msc, int64_t *sbc)
 223 {
 224    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 225                       sbc);
 226 }
 227
 228 static void
 229 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 230 {
 231    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 232    XRectangle xrect;
 233    XserverRegion region;
 234
 235    /* Check we have the right attachments */
 236    if (!priv->have_back)
 237       return;
 238
 239    xrect.x = x;
 240    xrect.y = priv->height - y - height;
 241    xrect.width = width;
 242    xrect.height = height;
 243
 244 #ifdef __DRI2_FLUSH
 245    if (pdraw->psc->f)
 246       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 247 #endif
 248
 249    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 250    /* should get a fence ID back from here at some point */
 251    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 252                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 253    XFixesDestroyRegion(pdraw->psc->dpy, region);
 254
 255    /* Refresh the fake front (if present) after we just damaged the real
 256     * front.
 257     */
 258    dri2WaitX(pdraw);
 259 }
 260
 261 static void
 262 dri2WaitX(__GLXDRIdrawable *pdraw)
 263 {
 264    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 265    XRectangle xrect;
 266    XserverRegion region;
 267
 268    /* Check we have the right attachments */
 269    if (!priv->have_fake_front)
 270       return;
 271
 272    xrect.x = 0;
 273    xrect.y = 0;
 274    xrect.width = priv->width;
 275    xrect.height = priv->height;
 276
 277 #ifdef __DRI2_FLUSH
 278    if (pdraw->psc->f)
 279       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 280 #endif
 281
 282    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 283    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 284                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 285    XFixesDestroyRegion(pdraw->psc->dpy, region);
 286 }
 287
 288 static void
 289 dri2WaitGL(__GLXDRIdrawable * pdraw)
 290 {
 291    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 292    XRectangle xrect;
 293    XserverRegion region;
 294
 295    if (!priv->have_fake_front)
 296       return;
 297
 298    xrect.x = 0;
 299    xrect.y = 0;
 300    xrect.width = priv->width;
 301    xrect.height = priv->height;
 302
 303 #ifdef __DRI2_FLUSH
 304    if (pdraw->psc->f)
 305       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 306 #endif
 307
 308    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 309    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 310                   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 311    XFixesDestroyRegion(pdraw->psc->dpy, region);
 312 }
 313
 314 static void
 315 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 316 {
 317    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 318    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 319    __GLXDRIdisplayPrivate *pdp = (__GLXDRIdisplayPrivate *)priv->dri2Display;
 320
 321    /* Old servers don't send invalidate events */
 322    if (!pdp->invalidateAvailable)
 323        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 324
 325    dri2WaitGL(loaderPrivate);
 326 }
 327
 328
 329 static void
 330 dri2DestroyScreen(__GLXscreenConfigs * psc)
 331 {
 332    /* Free the direct rendering per screen data */
 333    (*psc->core->destroyScreen) (psc->__driScreen);
 334    close(psc->fd);
 335    psc->__driScreen = NULL;
 336 }
 337
 338 /**
 339  * Process list of buffer received from the server
 340  *
 341  * Processes the list of buffers received in a reply from the server to either
 342  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 343  */
 344 static void
 345 process_buffers(__GLXDRIdrawablePrivate * pdraw, DRI2Buffer * buffers,
 346                 unsigned count)
 347 {
 348    int i;
 349
 350    pdraw->bufferCount = count;
 351    pdraw->have_fake_front = 0;
 352    pdraw->have_back = 0;
 353
 354    /* This assumes the DRI2 buffer attachment tokens matches the
 355     * __DRIbuffer tokens. */
 356    for (i = 0; i < count; i++) {
 357       pdraw->buffers[i].attachment = buffers[i].attachment;
 358       pdraw->buffers[i].name = buffers[i].name;
 359       pdraw->buffers[i].pitch = buffers[i].pitch;
 360       pdraw->buffers[i].cpp = buffers[i].cpp;
 361       pdraw->buffers[i].flags = buffers[i].flags;
 362       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 363          pdraw->have_fake_front = 1;
 364       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 365          pdraw->have_back = 1;
 366    }
 367
 368 }
 369
 370 static int64_t
 371 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 372                 int64_t remainder)
 373 {
 374     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 375     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 376     __GLXDRIdisplayPrivate *pdp =
 377         (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;
 378     int64_t ret;
 379
 380 #ifdef __DRI2_FLUSH
 381     if (pdraw->psc->f)
 382         (*pdraw->psc->f->flush)(pdraw->driDrawable);
 383 #endif
 384
 385     /* Old servers don't send invalidate events */
 386     if (!pdp->invalidateAvailable)
 387        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 388
 389     /* Old servers can't handle swapbuffers */
 390     if (!pdp->swapAvailable) {
 391        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 392        return 0;
 393     }
 394
 395 #ifdef X_DRI2SwapBuffers
 396     DRI2SwapBuffers(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 397                     remainder, &ret);
 398 #endif
 399
 400     return ret;
 401 }
 402
 403 static __DRIbuffer *
 404 dri2GetBuffers(__DRIdrawable * driDrawable,
 405                int *width, int *height,
 406                unsigned int *attachments, int count,
 407                int *out_count, void *loaderPrivate)
 408 {
 409    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 410    DRI2Buffer *buffers;
 411
 412    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 413                             width, height, attachments, count, out_count);
 414    if (buffers == NULL)
 415       return NULL;
 416
 417    pdraw->width = *width;
 418    pdraw->height = *height;
 419    process_buffers(pdraw, buffers, *out_count);
 420
 421    Xfree(buffers);
 422
 423    return pdraw->buffers;
 424 }
 425
 426 static __DRIbuffer *
 427 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 428                          int *width, int *height,
 429                          unsigned int *attachments, int count,
 430                          int *out_count, void *loaderPrivate)
 431 {
 432    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 433    DRI2Buffer *buffers;
 434
 435    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 436                                       pdraw->base.xDrawable,
 437                                       width, height, attachments,
 438                                       count, out_count);
 439    if (buffers == NULL)
 440       return NULL;
 441
 442    pdraw->width = *width;
 443    pdraw->height = *height;
 444    process_buffers(pdraw, buffers, *out_count);
 445
 446    Xfree(buffers);
 447
 448    return pdraw->buffers;
 449 }
 450
 451 static void
 452 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 453 {
 454    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 455
 456    DRI2SwapInterval(priv->base.psc->dpy, pdraw->xDrawable, interval);
 457    priv->swap_interval = interval;
 458 }
 459
 460 static unsigned int
 461 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 462 {
 463    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 464
 465   return priv->swap_interval;
 466 }
 467
 468 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 469    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 470    dri2GetBuffers,
 471    dri2FlushFrontBuffer,
 472    dri2GetBuffersWithFormat,
 473 };
 474
 475 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 476    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 477    dri2GetBuffers,
 478    dri2FlushFrontBuffer,
 479    NULL,
 480 };
 481
 482 static const __DRIextension *loader_extensions[] = {
 483    &dri2LoaderExtension.base,
 484    &systemTimeExtension.base,
 485    NULL
 486 };
 487
 488 static const __DRIextension *loader_extensions_old[] = {
 489    &dri2LoaderExtension_old.base,
 490    &systemTimeExtension.base,
 491    NULL
 492 };
 493
 494 _X_HIDDEN void
 495 dri2InvalidateBuffers(Display *dpy, XID drawable)
 496 {
 497    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 498
 499 #if __DRI2_FLUSH_VERSION >= 3
 500    if (pdraw && pdraw->psc->f)
 501        pdraw->psc->f->invalidate(pdraw->driDrawable);
 502 #endif
 503 }
 504
 505 static __GLXDRIscreen *
 506 dri2CreateScreen(__GLXscreenConfigs * psc, int screen,
 507                  __GLXdisplayPrivate * priv)
 508 {
 509    const __DRIconfig **driver_configs;
 510    const __DRIextension **extensions;
 511    const __GLXDRIdisplayPrivate *const pdp = (__GLXDRIdisplayPrivate *)
 512       priv->dri2Display;
 513    __GLXDRIscreen *psp;
 514    char *driverName, *deviceName;
 515    drm_magic_t magic;
 516    int i;
 517
 518    psp = Xmalloc(sizeof *psp);
 519    if (psp == NULL)
 520       return NULL;
 521
 522    if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 523                     &driverName, &deviceName)) {
 524       XFree(psp);
 525       return NULL;
 526    }
 527
 528    psc->driver = driOpenDriver(driverName);
 529    if (psc->driver == NULL) {
 530       ErrorMessageF("driver pointer missing\n");
 531       goto handle_error;
 532    }
 533
 534    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 535    if (extensions == NULL) {
 536       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 537       goto handle_error;
 538    }
 539
 540    for (i = 0; extensions[i]; i++) {
 541       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 542          psc->core = (__DRIcoreExtension *) extensions[i];
 543       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 544          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 545    }
 546
 547    if (psc->core == NULL || psc->dri2 == NULL) {
 548       ErrorMessageF("core dri or dri2 extension not found\n");
 549       goto handle_error;
 550    }
 551
 552    psc->fd = open(deviceName, O_RDWR);
 553    if (psc->fd < 0) {
 554       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 555       goto handle_error;
 556    }
 557
 558    if (drmGetMagic(psc->fd, &magic)) {
 559       ErrorMessageF("failed to get magic\n");
 560       goto handle_error;
 561    }
 562
 563    if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
 564       ErrorMessageF("failed to authenticate magic %d\n", magic);
 565       goto handle_error;
 566    }
 567
 568    /* If the server does not support the protocol for
 569     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 570     */
 571    psc->__driScreen =
 572       psc->dri2->createNewScreen(screen, psc->fd, ((pdp->driMinor < 1)
 573                                                    ? loader_extensions_old
 574                                                    : loader_extensions),
 575                                  &driver_configs, psc);
 576
 577    if (psc->__driScreen == NULL) {
 578       ErrorMessageF("failed to create dri screen\n");
 579       goto handle_error;
 580    }
 581
 582    driBindCommonExtensions(psc);
 583    dri2BindExtensions(psc);
 584
 585    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 586    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 587
 588    psc->driver_configs = driver_configs;
 589
 590    psp->destroyScreen = dri2DestroyScreen;
 591    psp->createContext = dri2CreateContext;
 592    psp->createDrawable = dri2CreateDrawable;
 593    psp->swapBuffers = dri2SwapBuffers;
 594    psp->waitGL = dri2WaitGL;
 595    psp->waitX = dri2WaitX;
 596    psp->getDrawableMSC = NULL;
 597    psp->waitForMSC = NULL;
 598    psp->waitForSBC = NULL;
 599    psp->setSwapInterval = NULL;
 600    psp->getSwapInterval = NULL;
 601
 602    if (pdp->driMinor >= 2) {
 603 #ifdef X_DRI2GetMSC
 604       psp->getDrawableMSC = dri2DrawableGetMSC;
 605 #endif
 606 #ifdef X_DRI2WaitMSC
 607       psp->waitForMSC = dri2WaitForMSC;
 608       psp->waitForSBC = dri2WaitForSBC;
 609 #endif
 610 #ifdef X_DRI2SwapInterval
 611       psp->setSwapInterval = dri2SetSwapInterval;
 612       psp->getSwapInterval = dri2GetSwapInterval;
 613 #endif
 614 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 615       __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
 616 #endif
 617    }
 618
 619    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 620     * available.*/
 621    psp->copySubBuffer = dri2CopySubBuffer;
 622    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 623
 624    Xfree(driverName);
 625    Xfree(deviceName);
 626
 627    return psp;
 628
 629 handle_error:
 630    Xfree(driverName);
 631    Xfree(deviceName);
 632    XFree(psp);
 633
 634    /* FIXME: clean up here */
 635
 636    return NULL;
 637 }
 638
 639 /* Called from __glXFreeDisplayPrivate.
 640  */
 641 static void
 642 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 643 {
 644    Xfree(dpy);
 645 }
 646
 647 /*
 648  * Allocate, initialize and return a __DRIdisplayPrivate object.
 649  * This is called from __glXInitialize() when we are given a new
 650  * display pointer.
 651  */
 652 _X_HIDDEN __GLXDRIdisplay *
 653 dri2CreateDisplay(Display * dpy)
 654 {
 655    __GLXDRIdisplayPrivate *pdp;
 656    int eventBase, errorBase;
 657
 658    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 659       return NULL;
 660
 661    pdp = Xmalloc(sizeof *pdp);
 662    if (pdp == NULL)
 663       return NULL;
 664
 665    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 666       Xfree(pdp);
 667       return NULL;
 668    }
 669
 670    pdp->driPatch = 0;
 671    pdp->swapAvailable = (pdp->driMinor >= 2);
 672    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 673
 674    pdp->base.destroyDisplay = dri2DestroyDisplay;
 675    pdp->base.createScreen = dri2CreateScreen;
 676
 677    return &pdp->base;
 678 }
 679
 680 #endif /* GLX_DIRECT_RENDERING */