src/glx/x11/dri2.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
  34 #ifdef GLX_DIRECT_RENDERING
  35
  36 #define NEED_REPLIES
  37 #include <stdio.h>
  38 #include <X11/Xlibint.h>
  39 #include <X11/extensions/Xext.h>
  40 #include <X11/extensions/extutil.h>
  41 #include <X11/extensions/dri2proto.h>
  42 #include "xf86drm.h"
  43 #include "dri2.h"
  44 #include "glxclient.h"
  45 #include "GL/glxext.h"
  46
  47 /* Allow the build to work with an older versions of dri2proto.h and
  48  * dri2tokens.h.
  49  */
  50 #if DRI2_MINOR < 1
  51 #undef DRI2_MINOR
  52 #define DRI2_MINOR 1
  53 #define X_DRI2GetBuffersWithFormat 7
  54 #endif
  55
  56
  57 static char dri2ExtensionName[] = DRI2_NAME;
  58 static XExtensionInfo *dri2Info;
  59 static XEXT_GENERATE_CLOSE_DISPLAY (DRI2CloseDisplay, dri2Info)
  60
  61 static Bool
  62 DRI2WireToEvent(Display *dpy, XEvent *event, xEvent *wire);
  63 static Status
  64 DRI2EventToWire(Display *dpy, XEvent *event, xEvent *wire);
  65
  66 static /* const */ XExtensionHooks dri2ExtensionHooks = {
  67   NULL,                   /* create_gc */
  68   NULL,                   /* copy_gc */
  69   NULL,                   /* flush_gc */
  70   NULL,                   /* free_gc */
  71   NULL,                   /* create_font */
  72   NULL,                   /* free_font */
  73   DRI2CloseDisplay,       /* close_display */
  74   DRI2WireToEvent,        /* wire_to_event */
  75   DRI2EventToWire,        /* event_to_wire */
  76   NULL,                   /* error */
  77   NULL,                   /* error_string */
  78 };
  79
  80 static XEXT_GENERATE_FIND_DISPLAY (DRI2FindDisplay,
  81                                    dri2Info,
  82                                    dri2ExtensionName,
  83                                    &dri2ExtensionHooks,
  84                                    1, NULL)
  85
  86 static Bool
  87 DRI2WireToEvent(Display *dpy, XEvent *event, xEvent *wire)
  88 {
  89    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
  90    XExtDisplayInfo *glx_info = __glXFindDisplay(dpy);
  91    static int glx_event_base;
  92    static Bool found_glx_info = False;
  93
  94    XextCheckExtension(dpy, info, dri2ExtensionName, False);
  95
  96    switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
  97
  98 #ifdef X_DRI2SwapBuffers
  99    case DRI2_BufferSwapComplete:
 100    {
 101       GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
 102       xDRI2BufferSwapComplete *awire = (xDRI2BufferSwapComplete *)wire;
 103       aevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *) wire);
 104       aevent->type =
 105           (glx_info->codes->first_event + GLX_BufferSwapComplete) & 0x75;
 106       aevent->send_event = (awire->type & 0x80) != 0;
 107       aevent->display = dpy;
 108       aevent->drawable = awire->drawable;
 109       switch (awire->event_type) {
 110       case DRI2_EXCHANGE_COMPLETE:
 111          aevent->event_type = GLX_EXCHANGE_COMPLETE_INTEL;
 112          break;
 113       case DRI2_BLIT_COMPLETE:
 114          aevent->event_type = GLX_BLIT_COMPLETE_INTEL;
 115          break;
 116       case DRI2_FLIP_COMPLETE:
 117          aevent->event_type = GLX_FLIP_COMPLETE_INTEL;
 118          break;
 119       default:
 120          /* unknown swap completion type */
 121          return False;
 122       }
 123       aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
 124       aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
 125       aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
 126       return True;
 127    }
 128 #endif
 129
 130    default:
 131       /* client doesn't support server event */
 132       break;
 133    }
 134
 135    return False;
 136 }
 137
 138 /* We don't actually support this.  It doesn't make sense for clients to
 139  * send each other DRI2 events.
 140  */
 141 static Status
 142 DRI2EventToWire(Display *dpy, XEvent *event, xEvent *wire)
 143 {
 144    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 145
 146    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 147
 148    switch (event->type) {
 149    default:
 150       /* client doesn't support server event */
 151       break;
 152    }
 153
 154    return Success;
 155 }
 156
 157 Bool
 158 DRI2QueryExtension(Display * dpy, int *eventBase, int *errorBase)
 159 {
 160    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 161
 162    if (XextHasExtension(info)) {
 163       *eventBase = info->codes->first_event;
 164       *errorBase = info->codes->first_error;
 165       return True;
 166    }
 167
 168    return False;
 169 }
 170
 171 Bool
 172 DRI2QueryVersion(Display * dpy, int *major, int *minor)
 173 {
 174    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 175    xDRI2QueryVersionReply rep;
 176    xDRI2QueryVersionReq *req;
 177
 178    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 179
 180    LockDisplay(dpy);
 181    GetReq(DRI2QueryVersion, req);
 182    req->reqType = info->codes->major_opcode;
 183    req->dri2ReqType = X_DRI2QueryVersion;
 184    req->majorVersion = DRI2_MAJOR;
 185    req->minorVersion = DRI2_MINOR;
 186    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 187       UnlockDisplay(dpy);
 188       SyncHandle();
 189       return False;
 190    }
 191    *major = rep.majorVersion;
 192    *minor = rep.minorVersion;
 193    UnlockDisplay(dpy);
 194    SyncHandle();
 195
 196    return True;
 197 }
 198
 199 Bool
 200 DRI2Connect(Display * dpy, XID window, char **driverName, char **deviceName)
 201 {
 202    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 203    xDRI2ConnectReply rep;
 204    xDRI2ConnectReq *req;
 205
 206    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 207
 208    LockDisplay(dpy);
 209    GetReq(DRI2Connect, req);
 210    req->reqType = info->codes->major_opcode;
 211    req->dri2ReqType = X_DRI2Connect;
 212    req->window = window;
 213    req->driverType = DRI2DriverDRI;
 214    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 215       UnlockDisplay(dpy);
 216       SyncHandle();
 217       return False;
 218    }
 219
 220    if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
 221       UnlockDisplay(dpy);
 222       SyncHandle();
 223       return False;
 224    }
 225
 226    *driverName = Xmalloc(rep.driverNameLength + 1);
 227    if (*driverName == NULL) {
 228       _XEatData(dpy,
 229                 ((rep.driverNameLength + 3) & ~3) +
 230                 ((rep.deviceNameLength + 3) & ~3));
 231       UnlockDisplay(dpy);
 232       SyncHandle();
 233       return False;
 234    }
 235    _XReadPad(dpy, *driverName, rep.driverNameLength);
 236    (*driverName)[rep.driverNameLength] = '\0';
 237
 238    *deviceName = Xmalloc(rep.deviceNameLength + 1);
 239    if (*deviceName == NULL) {
 240       Xfree(*driverName);
 241       _XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
 242       UnlockDisplay(dpy);
 243       SyncHandle();
 244       return False;
 245    }
 246    _XReadPad(dpy, *deviceName, rep.deviceNameLength);
 247    (*deviceName)[rep.deviceNameLength] = '\0';
 248
 249    UnlockDisplay(dpy);
 250    SyncHandle();
 251
 252    return True;
 253 }
 254
 255 Bool
 256 DRI2Authenticate(Display * dpy, XID window, drm_magic_t magic)
 257 {
 258    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 259    xDRI2AuthenticateReq *req;
 260    xDRI2AuthenticateReply rep;
 261
 262    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 263
 264    LockDisplay(dpy);
 265    GetReq(DRI2Authenticate, req);
 266    req->reqType = info->codes->major_opcode;
 267    req->dri2ReqType = X_DRI2Authenticate;
 268    req->window = window;
 269    req->magic = magic;
 270
 271    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 272       UnlockDisplay(dpy);
 273       SyncHandle();
 274       return False;
 275    }
 276
 277    UnlockDisplay(dpy);
 278    SyncHandle();
 279
 280    return rep.authenticated;
 281 }
 282
 283 void
 284 DRI2CreateDrawable(Display * dpy, XID drawable)
 285 {
 286    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 287    xDRI2CreateDrawableReq *req;
 288
 289    XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
 290
 291    LockDisplay(dpy);
 292    GetReq(DRI2CreateDrawable, req);
 293    req->reqType = info->codes->major_opcode;
 294    req->dri2ReqType = X_DRI2CreateDrawable;
 295    req->drawable = drawable;
 296    UnlockDisplay(dpy);
 297    SyncHandle();
 298 }
 299
 300 void
 301 DRI2DestroyDrawable(Display * dpy, XID drawable)
 302 {
 303    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 304    xDRI2DestroyDrawableReq *req;
 305
 306    XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
 307
 308    XSync(dpy, False);
 309
 310    LockDisplay(dpy);
 311    GetReq(DRI2DestroyDrawable, req);
 312    req->reqType = info->codes->major_opcode;
 313    req->dri2ReqType = X_DRI2DestroyDrawable;
 314    req->drawable = drawable;
 315    UnlockDisplay(dpy);
 316    SyncHandle();
 317 }
 318
 319 DRI2Buffer *
 320 DRI2GetBuffers(Display * dpy, XID drawable,
 321                int *width, int *height,
 322                unsigned int *attachments, int count, int *outCount)
 323 {
 324    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 325    xDRI2GetBuffersReply rep;
 326    xDRI2GetBuffersReq *req;
 327    DRI2Buffer *buffers;
 328    xDRI2Buffer repBuffer;
 329    CARD32 *p;
 330    int i;
 331
 332    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 333
 334    LockDisplay(dpy);
 335    GetReqExtra(DRI2GetBuffers, count * 4, req);
 336    req->reqType = info->codes->major_opcode;
 337    req->dri2ReqType = X_DRI2GetBuffers;
 338    req->drawable = drawable;
 339    req->count = count;
 340    p = (CARD32 *) & req[1];
 341    for (i = 0; i < count; i++)
 342       p[i] = attachments[i];
 343
 344    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 345       UnlockDisplay(dpy);
 346       SyncHandle();
 347       return NULL;
 348    }
 349
 350    *width = rep.width;
 351    *height = rep.height;
 352    *outCount = rep.count;
 353
 354    buffers = Xmalloc(rep.count * sizeof buffers[0]);
 355    if (buffers == NULL) {
 356       _XEatData(dpy, rep.count * sizeof repBuffer);
 357       UnlockDisplay(dpy);
 358       SyncHandle();
 359       return NULL;
 360    }
 361
 362    for (i = 0; i < rep.count; i++) {
 363       _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
 364       buffers[i].attachment = repBuffer.attachment;
 365       buffers[i].name = repBuffer.name;
 366       buffers[i].pitch = repBuffer.pitch;
 367       buffers[i].cpp = repBuffer.cpp;
 368       buffers[i].flags = repBuffer.flags;
 369    }
 370
 371    UnlockDisplay(dpy);
 372    SyncHandle();
 373
 374    return buffers;
 375 }
 376
 377
 378 DRI2Buffer *
 379 DRI2GetBuffersWithFormat(Display * dpy, XID drawable,
 380                          int *width, int *height,
 381                          unsigned int *attachments, int count, int *outCount)
 382 {
 383    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 384    xDRI2GetBuffersReply rep;
 385    xDRI2GetBuffersReq *req;
 386    DRI2Buffer *buffers;
 387    xDRI2Buffer repBuffer;
 388    CARD32 *p;
 389    int i;
 390
 391    XextCheckExtension(dpy, info, dri2ExtensionName, False);
 392
 393    LockDisplay(dpy);
 394    GetReqExtra(DRI2GetBuffers, count * (4 * 2), req);
 395    req->reqType = info->codes->major_opcode;
 396    req->dri2ReqType = X_DRI2GetBuffersWithFormat;
 397    req->drawable = drawable;
 398    req->count = count;
 399    p = (CARD32 *) & req[1];
 400    for (i = 0; i < (count * 2); i++)
 401       p[i] = attachments[i];
 402
 403    if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
 404       UnlockDisplay(dpy);
 405       SyncHandle();
 406       return NULL;
 407    }
 408
 409    *width = rep.width;
 410    *height = rep.height;
 411    *outCount = rep.count;
 412
 413    buffers = Xmalloc(rep.count * sizeof buffers[0]);
 414    if (buffers == NULL) {
 415       _XEatData(dpy, rep.count * sizeof repBuffer);
 416       UnlockDisplay(dpy);
 417       SyncHandle();
 418       return NULL;
 419    }
 420
 421    for (i = 0; i < rep.count; i++) {
 422       _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
 423       buffers[i].attachment = repBuffer.attachment;
 424       buffers[i].name = repBuffer.name;
 425       buffers[i].pitch = repBuffer.pitch;
 426       buffers[i].cpp = repBuffer.cpp;
 427       buffers[i].flags = repBuffer.flags;
 428    }
 429
 430    UnlockDisplay(dpy);
 431    SyncHandle();
 432
 433    return buffers;
 434 }
 435
 436
 437 void
 438 DRI2CopyRegion(Display * dpy, XID drawable, XserverRegion region,
 439                CARD32 dest, CARD32 src)
 440 {
 441    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 442    xDRI2CopyRegionReq *req;
 443    xDRI2CopyRegionReply rep;
 444
 445    XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
 446
 447    LockDisplay(dpy);
 448    GetReq(DRI2CopyRegion, req);
 449    req->reqType = info->codes->major_opcode;
 450    req->dri2ReqType = X_DRI2CopyRegion;
 451    req->drawable = drawable;
 452    req->region = region;
 453    req->dest = dest;
 454    req->src = src;
 455
 456    _XReply(dpy, (xReply *) & rep, 0, xFalse);
 457
 458    UnlockDisplay(dpy);
 459    SyncHandle();
 460 }
 461
 462 #ifdef X_DRI2SwapBuffers
 463 static void
 464 load_swap_req(xDRI2SwapBuffersReq *req, CARD64 target, CARD64 divisor,
 465              CARD64 remainder)
 466 {
 467     req->target_msc_hi = target >> 32;
 468     req->target_msc_lo = target & 0xffffffff;
 469     req->divisor_hi = divisor >> 32;
 470     req->divisor_lo = divisor & 0xffffffff;
 471     req->remainder_hi = remainder >> 32;
 472     req->remainder_lo = remainder & 0xffffffff;
 473 }
 474
 475 static CARD64
 476 vals_to_card64(CARD32 lo, CARD32 hi)
 477 {
 478     return (CARD64)hi << 32 | lo;
 479 }
 480
 481 void DRI2SwapBuffers(Display *dpy, XID drawable, CARD64 target_msc,
 482                      CARD64 divisor, CARD64 remainder, CARD64 *count)
 483 {
 484     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 485     xDRI2SwapBuffersReq *req;
 486     xDRI2SwapBuffersReply rep;
 487
 488     XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
 489
 490     LockDisplay(dpy);
 491     GetReq(DRI2SwapBuffers, req);
 492     req->reqType = info->codes->major_opcode;
 493     req->dri2ReqType = X_DRI2SwapBuffers;
 494     req->drawable = drawable;
 495     load_swap_req(req, target_msc, divisor, remainder);
 496
 497     _XReply(dpy, (xReply *)&rep, 0, xFalse);
 498
 499     *count = vals_to_card64(rep.swap_lo, rep.swap_hi);
 500
 501     UnlockDisplay(dpy);
 502     SyncHandle();
 503 }
 504 #endif
 505
 506 #ifdef X_DRI2GetMSC
 507 Bool DRI2GetMSC(Display *dpy, XID drawable, CARD64 *ust, CARD64 *msc,
 508                 CARD64 *sbc)
 509 {
 510     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 511     xDRI2GetMSCReq *req;
 512     xDRI2MSCReply rep;
 513
 514     XextCheckExtension (dpy, info, dri2ExtensionName, False);
 515
 516     LockDisplay(dpy);
 517     GetReq(DRI2GetMSC, req);
 518     req->reqType = info->codes->major_opcode;
 519     req->dri2ReqType = X_DRI2GetMSC;
 520     req->drawable = drawable;
 521
 522     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
 523         UnlockDisplay(dpy);
 524         SyncHandle();
 525         return False;
 526     }
 527
 528     *ust = vals_to_card64(rep.ust_lo, rep.ust_hi);
 529     *msc = vals_to_card64(rep.msc_lo, rep.msc_hi);
 530     *sbc = vals_to_card64(rep.sbc_lo, rep.sbc_hi);
 531
 532     UnlockDisplay(dpy);
 533     SyncHandle();
 534
 535     return True;
 536 }
 537 #endif
 538
 539 #ifdef X_DRI2WaitMSC
 540 static void
 541 load_msc_req(xDRI2WaitMSCReq *req, CARD64 target, CARD64 divisor,
 542              CARD64 remainder)
 543 {
 544     req->target_msc_hi = target >> 32;
 545     req->target_msc_lo = target & 0xffffffff;
 546     req->divisor_hi = divisor >> 32;
 547     req->divisor_lo = divisor & 0xffffffff;
 548     req->remainder_hi = remainder >> 32;
 549     req->remainder_lo = remainder & 0xffffffff;
 550 }
 551
 552 Bool DRI2WaitMSC(Display *dpy, XID drawable, CARD64 target_msc, CARD64 divisor,
 553                  CARD64 remainder, CARD64 *ust, CARD64 *msc, CARD64 *sbc)
 554 {
 555     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 556     xDRI2WaitMSCReq *req;
 557     xDRI2MSCReply rep;
 558
 559     XextCheckExtension (dpy, info, dri2ExtensionName, False);
 560
 561     LockDisplay(dpy);
 562     GetReq(DRI2WaitMSC, req);
 563     req->reqType = info->codes->major_opcode;
 564     req->dri2ReqType = X_DRI2WaitMSC;
 565     req->drawable = drawable;
 566     load_msc_req(req, target_msc, divisor, remainder);
 567
 568     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
 569         UnlockDisplay(dpy);
 570         SyncHandle();
 571         return False;
 572     }
 573
 574     *ust = ((CARD64)rep.ust_hi << 32) | (CARD64)rep.ust_lo;
 575     *msc = ((CARD64)rep.msc_hi << 32) | (CARD64)rep.msc_lo;
 576     *sbc = ((CARD64)rep.sbc_hi << 32) | (CARD64)rep.sbc_lo;
 577
 578     UnlockDisplay(dpy);
 579     SyncHandle();
 580
 581     return True;
 582 }
 583 #endif
 584
 585 #ifdef X_DRI2WaitSBC
 586 static void
 587 load_sbc_req(xDRI2WaitSBCReq *req, CARD64 target)
 588 {
 589     req->target_sbc_hi = target >> 32;
 590     req->target_sbc_lo = target & 0xffffffff;
 591 }
 592
 593 Bool DRI2WaitSBC(Display *dpy, XID drawable, CARD64 target_sbc, CARD64 *ust,
 594                  CARD64 *msc, CARD64 *sbc)
 595 {
 596     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 597     xDRI2WaitSBCReq *req;
 598     xDRI2MSCReply rep;
 599
 600     XextCheckExtension (dpy, info, dri2ExtensionName, False);
 601
 602     LockDisplay(dpy);
 603     GetReq(DRI2WaitSBC, req);
 604     req->reqType = info->codes->major_opcode;
 605     req->dri2ReqType = X_DRI2WaitSBC;
 606     req->drawable = drawable;
 607     load_sbc_req(req, target_sbc);
 608
 609     if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
 610         UnlockDisplay(dpy);
 611         SyncHandle();
 612         return False;
 613     }
 614
 615     *ust = ((CARD64)rep.ust_hi << 32) | rep.ust_lo;
 616     *msc = ((CARD64)rep.msc_hi << 32) | rep.msc_lo;
 617     *sbc = ((CARD64)rep.sbc_hi << 32) | rep.sbc_lo;
 618
 619     UnlockDisplay(dpy);
 620     SyncHandle();
 621
 622     return True;
 623 }
 624 #endif
 625
 626 #ifdef X_DRI2SwapInterval
 627 void DRI2SwapInterval(Display *dpy, XID drawable, int interval)
 628 {
 629     XExtDisplayInfo *info = DRI2FindDisplay(dpy);
 630     xDRI2SwapIntervalReq *req;
 631
 632     XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
 633
 634     LockDisplay(dpy);
 635     GetReq(DRI2SwapInterval, req);
 636     req->reqType = info->codes->major_opcode;
 637     req->dri2ReqType = X_DRI2SwapInterval;
 638     req->drawable = drawable;
 639     req->interval = interval;
 640     UnlockDisplay(dpy);
 641     SyncHandle();
 642 }
 643 #endif
 644
 645 #endif /* GLX_DIRECT_RENDERING */