dri2.c revision d2fe97a209134ff5267e8aa065865c3398bfb280 
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#include <stdio.h>
37#include <X11/Xlibint.h>
38#include <X11/extensions/Xext.h>
39#include <X11/extensions/extutil.h>
40#include <X11/extensions/dri2proto.h>
41#include "xf86drm.h"
42#include "dri2.h"
43#include "glxclient.h"
44#include "GL/glxext.h"
45
46/* Allow the build to work with an older versions of dri2proto.h and
47 * dri2tokens.h.
48 */
49#if DRI2_MINOR < 1
50#undef DRI2_MINOR
51#define DRI2_MINOR 1
52#define X_DRI2GetBuffersWithFormat 7
53#endif
54
55
56static char dri2ExtensionName[] = DRI2_NAME;
57static XExtensionInfo *dri2Info;
58static XEXT_GENERATE_CLOSE_DISPLAY (DRI2CloseDisplay, dri2Info)
59
60static Bool
61DRI2WireToEvent(Display *dpy, XEvent *event, xEvent *wire);
62static Status
63DRI2EventToWire(Display *dpy, XEvent *event, xEvent *wire);
64static int
65DRI2Error(Display *display, xError *err, XExtCodes *codes, int *ret_code);
66
67static /* const */ XExtensionHooks dri2ExtensionHooks = {
68  NULL,                   /* create_gc */
69  NULL,                   /* copy_gc */
70  NULL,                   /* flush_gc */
71  NULL,                   /* free_gc */
72  NULL,                   /* create_font */
73  NULL,                   /* free_font */
74  DRI2CloseDisplay,       /* close_display */
75  DRI2WireToEvent,        /* wire_to_event */
76  DRI2EventToWire,        /* event_to_wire */
77  DRI2Error,              /* error */
78  NULL,                   /* error_string */
79};
80
81static XEXT_GENERATE_FIND_DISPLAY (DRI2FindDisplay,
82                                   dri2Info,
83                                   dri2ExtensionName,
84                                   &dri2ExtensionHooks,
85                                   0, NULL)
86
87static Bool
88DRI2WireToEvent(Display *dpy, XEvent *event, xEvent *wire)
89{
90   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
91   XExtDisplayInfo *glx_info = __glXFindDisplay(dpy);
92
93   XextCheckExtension(dpy, info, dri2ExtensionName, False);
94
95   switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
96
97#ifdef X_DRI2SwapBuffers
98   case DRI2_BufferSwapComplete:
99   {
100      GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
101      xDRI2BufferSwapComplete *awire = (xDRI2BufferSwapComplete *)wire;
102      aevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *) wire);
103      aevent->type = glx_info->codes->first_event + GLX_BufferSwapComplete;
104      aevent->send_event = (awire->type & 0x80) != 0;
105      aevent->display = dpy;
106      aevent->drawable = awire->drawable;
107      switch (awire->event_type) {
108      case DRI2_EXCHANGE_COMPLETE:
109	 aevent->event_type = GLX_EXCHANGE_COMPLETE_INTEL;
110	 break;
111      case DRI2_BLIT_COMPLETE:
112	 aevent->event_type = GLX_COPY_COMPLETE_INTEL;
113	 break;
114      case DRI2_FLIP_COMPLETE:
115	 aevent->event_type = GLX_FLIP_COMPLETE_INTEL;
116	 break;
117      default:
118	 /* unknown swap completion type */
119	 return False;
120      }
121      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
122      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
123      aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
124      return True;
125   }
126#endif
127#ifdef DRI2_InvalidateBuffers
128   case DRI2_InvalidateBuffers:
129   {
130      xDRI2InvalidateBuffers *awire = (xDRI2InvalidateBuffers *)wire;
131
132      dri2InvalidateBuffers(dpy, awire->drawable);
133      return False;
134   }
135#endif
136   default:
137      /* client doesn't support server event */
138      break;
139   }
140
141   return False;
142}
143
144/* We don't actually support this.  It doesn't make sense for clients to
145 * send each other DRI2 events.
146 */
147static Status
148DRI2EventToWire(Display *dpy, XEvent *event, xEvent *wire)
149{
150   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
151
152   XextCheckExtension(dpy, info, dri2ExtensionName, False);
153
154   switch (event->type) {
155   default:
156      /* client doesn't support server event */
157      break;
158   }
159
160   return Success;
161}
162
163static int
164DRI2Error(Display *display, xError *err, XExtCodes *codes, int *ret_code)
165{
166    if (err->majorCode == codes->major_opcode &&
167	err->errorCode == BadDrawable &&
168	err->minorCode == X_DRI2CopyRegion)
169	return True;
170
171    return False;
172}
173
174Bool
175DRI2QueryExtension(Display * dpy, int *eventBase, int *errorBase)
176{
177   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
178
179   if (XextHasExtension(info)) {
180      *eventBase = info->codes->first_event;
181      *errorBase = info->codes->first_error;
182      return True;
183   }
184
185   return False;
186}
187
188Bool
189DRI2QueryVersion(Display * dpy, int *major, int *minor)
190{
191   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
192   xDRI2QueryVersionReply rep;
193   xDRI2QueryVersionReq *req;
194   int i, nevents;
195
196   XextCheckExtension(dpy, info, dri2ExtensionName, False);
197
198   LockDisplay(dpy);
199   GetReq(DRI2QueryVersion, req);
200   req->reqType = info->codes->major_opcode;
201   req->dri2ReqType = X_DRI2QueryVersion;
202   req->majorVersion = DRI2_MAJOR;
203   req->minorVersion = DRI2_MINOR;
204   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
205      UnlockDisplay(dpy);
206      SyncHandle();
207      return False;
208   }
209   *major = rep.majorVersion;
210   *minor = rep.minorVersion;
211   UnlockDisplay(dpy);
212   SyncHandle();
213
214   switch (rep.minorVersion) {
215   case 1:
216	   nevents = 0;
217	   break;
218   case 2:
219	   nevents = 1;
220	   break;
221   case 3:
222   default:
223	   nevents = 2;
224	   break;
225   }
226
227   for (i = 0; i < nevents; i++) {
228       XESetWireToEvent (dpy, info->codes->first_event + i, DRI2WireToEvent);
229       XESetEventToWire (dpy, info->codes->first_event + i, DRI2EventToWire);
230   }
231
232   return True;
233}
234
235Bool
236DRI2Connect(Display * dpy, XID window, char **driverName, char **deviceName)
237{
238   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
239   xDRI2ConnectReply rep;
240   xDRI2ConnectReq *req;
241
242   XextCheckExtension(dpy, info, dri2ExtensionName, False);
243
244   LockDisplay(dpy);
245   GetReq(DRI2Connect, req);
246   req->reqType = info->codes->major_opcode;
247   req->dri2ReqType = X_DRI2Connect;
248   req->window = window;
249   req->driverType = DRI2DriverDRI;
250   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
251      UnlockDisplay(dpy);
252      SyncHandle();
253      return False;
254   }
255
256   if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
257      UnlockDisplay(dpy);
258      SyncHandle();
259      return False;
260   }
261
262   *driverName = Xmalloc(rep.driverNameLength + 1);
263   if (*driverName == NULL) {
264      _XEatData(dpy,
265                ((rep.driverNameLength + 3) & ~3) +
266                ((rep.deviceNameLength + 3) & ~3));
267      UnlockDisplay(dpy);
268      SyncHandle();
269      return False;
270   }
271   _XReadPad(dpy, *driverName, rep.driverNameLength);
272   (*driverName)[rep.driverNameLength] = '\0';
273
274   *deviceName = Xmalloc(rep.deviceNameLength + 1);
275   if (*deviceName == NULL) {
276      Xfree(*driverName);
277      _XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
278      UnlockDisplay(dpy);
279      SyncHandle();
280      return False;
281   }
282   _XReadPad(dpy, *deviceName, rep.deviceNameLength);
283   (*deviceName)[rep.deviceNameLength] = '\0';
284
285   UnlockDisplay(dpy);
286   SyncHandle();
287
288   return True;
289}
290
291Bool
292DRI2Authenticate(Display * dpy, XID window, drm_magic_t magic)
293{
294   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
295   xDRI2AuthenticateReq *req;
296   xDRI2AuthenticateReply rep;
297
298   XextCheckExtension(dpy, info, dri2ExtensionName, False);
299
300   LockDisplay(dpy);
301   GetReq(DRI2Authenticate, req);
302   req->reqType = info->codes->major_opcode;
303   req->dri2ReqType = X_DRI2Authenticate;
304   req->window = window;
305   req->magic = magic;
306
307   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
308      UnlockDisplay(dpy);
309      SyncHandle();
310      return False;
311   }
312
313   UnlockDisplay(dpy);
314   SyncHandle();
315
316   return rep.authenticated;
317}
318
319void
320DRI2CreateDrawable(Display * dpy, XID drawable)
321{
322   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
323   xDRI2CreateDrawableReq *req;
324
325   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
326
327   LockDisplay(dpy);
328   GetReq(DRI2CreateDrawable, req);
329   req->reqType = info->codes->major_opcode;
330   req->dri2ReqType = X_DRI2CreateDrawable;
331   req->drawable = drawable;
332   UnlockDisplay(dpy);
333   SyncHandle();
334}
335
336void
337DRI2DestroyDrawable(Display * dpy, XID drawable)
338{
339   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
340   xDRI2DestroyDrawableReq *req;
341
342   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
343
344   XSync(dpy, False);
345
346   LockDisplay(dpy);
347   GetReq(DRI2DestroyDrawable, req);
348   req->reqType = info->codes->major_opcode;
349   req->dri2ReqType = X_DRI2DestroyDrawable;
350   req->drawable = drawable;
351   UnlockDisplay(dpy);
352   SyncHandle();
353}
354
355DRI2Buffer *
356DRI2GetBuffers(Display * dpy, XID drawable,
357               int *width, int *height,
358               unsigned int *attachments, int count, int *outCount)
359{
360   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
361   xDRI2GetBuffersReply rep;
362   xDRI2GetBuffersReq *req;
363   DRI2Buffer *buffers;
364   xDRI2Buffer repBuffer;
365   CARD32 *p;
366   int i;
367
368   XextCheckExtension(dpy, info, dri2ExtensionName, False);
369
370   LockDisplay(dpy);
371   GetReqExtra(DRI2GetBuffers, count * 4, req);
372   req->reqType = info->codes->major_opcode;
373   req->dri2ReqType = X_DRI2GetBuffers;
374   req->drawable = drawable;
375   req->count = count;
376   p = (CARD32 *) & req[1];
377   for (i = 0; i < count; i++)
378      p[i] = attachments[i];
379
380   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
381      UnlockDisplay(dpy);
382      SyncHandle();
383      return NULL;
384   }
385
386   *width = rep.width;
387   *height = rep.height;
388   *outCount = rep.count;
389
390   buffers = Xmalloc(rep.count * sizeof buffers[0]);
391   if (buffers == NULL) {
392      _XEatData(dpy, rep.count * sizeof repBuffer);
393      UnlockDisplay(dpy);
394      SyncHandle();
395      return NULL;
396   }
397
398   for (i = 0; i < rep.count; i++) {
399      _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
400      buffers[i].attachment = repBuffer.attachment;
401      buffers[i].name = repBuffer.name;
402      buffers[i].pitch = repBuffer.pitch;
403      buffers[i].cpp = repBuffer.cpp;
404      buffers[i].flags = repBuffer.flags;
405   }
406
407   UnlockDisplay(dpy);
408   SyncHandle();
409
410   return buffers;
411}
412
413
414DRI2Buffer *
415DRI2GetBuffersWithFormat(Display * dpy, XID drawable,
416                         int *width, int *height,
417                         unsigned int *attachments, int count, int *outCount)
418{
419   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
420   xDRI2GetBuffersReply rep;
421   xDRI2GetBuffersReq *req;
422   DRI2Buffer *buffers;
423   xDRI2Buffer repBuffer;
424   CARD32 *p;
425   int i;
426
427   XextCheckExtension(dpy, info, dri2ExtensionName, False);
428
429   LockDisplay(dpy);
430   GetReqExtra(DRI2GetBuffers, count * (4 * 2), req);
431   req->reqType = info->codes->major_opcode;
432   req->dri2ReqType = X_DRI2GetBuffersWithFormat;
433   req->drawable = drawable;
434   req->count = count;
435   p = (CARD32 *) & req[1];
436   for (i = 0; i < (count * 2); i++)
437      p[i] = attachments[i];
438
439   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
440      UnlockDisplay(dpy);
441      SyncHandle();
442      return NULL;
443   }
444
445   *width = rep.width;
446   *height = rep.height;
447   *outCount = rep.count;
448
449   buffers = Xmalloc(rep.count * sizeof buffers[0]);
450   if (buffers == NULL) {
451      _XEatData(dpy, rep.count * sizeof repBuffer);
452      UnlockDisplay(dpy);
453      SyncHandle();
454      return NULL;
455   }
456
457   for (i = 0; i < rep.count; i++) {
458      _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
459      buffers[i].attachment = repBuffer.attachment;
460      buffers[i].name = repBuffer.name;
461      buffers[i].pitch = repBuffer.pitch;
462      buffers[i].cpp = repBuffer.cpp;
463      buffers[i].flags = repBuffer.flags;
464   }
465
466   UnlockDisplay(dpy);
467   SyncHandle();
468
469   return buffers;
470}
471
472
473void
474DRI2CopyRegion(Display * dpy, XID drawable, XserverRegion region,
475               CARD32 dest, CARD32 src)
476{
477   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
478   xDRI2CopyRegionReq *req;
479   xDRI2CopyRegionReply rep;
480
481   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
482
483   LockDisplay(dpy);
484   GetReq(DRI2CopyRegion, req);
485   req->reqType = info->codes->major_opcode;
486   req->dri2ReqType = X_DRI2CopyRegion;
487   req->drawable = drawable;
488   req->region = region;
489   req->dest = dest;
490   req->src = src;
491
492   _XReply(dpy, (xReply *) & rep, 0, xFalse);
493
494   UnlockDisplay(dpy);
495   SyncHandle();
496}
497
498#ifdef X_DRI2SwapBuffers
499static void
500load_swap_req(xDRI2SwapBuffersReq *req, CARD64 target, CARD64 divisor,
501	     CARD64 remainder)
502{
503    req->target_msc_hi = target >> 32;
504    req->target_msc_lo = target & 0xffffffff;
505    req->divisor_hi = divisor >> 32;
506    req->divisor_lo = divisor & 0xffffffff;
507    req->remainder_hi = remainder >> 32;
508    req->remainder_lo = remainder & 0xffffffff;
509}
510
511static CARD64
512vals_to_card64(CARD32 lo, CARD32 hi)
513{
514    return (CARD64)hi << 32 | lo;
515}
516
517void DRI2SwapBuffers(Display *dpy, XID drawable, CARD64 target_msc,
518		     CARD64 divisor, CARD64 remainder, CARD64 *count)
519{
520    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
521    xDRI2SwapBuffersReq *req;
522    xDRI2SwapBuffersReply rep;
523
524    XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
525
526    LockDisplay(dpy);
527    GetReq(DRI2SwapBuffers, req);
528    req->reqType = info->codes->major_opcode;
529    req->dri2ReqType = X_DRI2SwapBuffers;
530    req->drawable = drawable;
531    load_swap_req(req, target_msc, divisor, remainder);
532
533    _XReply(dpy, (xReply *)&rep, 0, xFalse);
534
535    *count = vals_to_card64(rep.swap_lo, rep.swap_hi);
536
537    UnlockDisplay(dpy);
538    SyncHandle();
539}
540#endif
541
542#ifdef X_DRI2GetMSC
543Bool DRI2GetMSC(Display *dpy, XID drawable, CARD64 *ust, CARD64 *msc,
544		CARD64 *sbc)
545{
546    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
547    xDRI2GetMSCReq *req;
548    xDRI2MSCReply rep;
549
550    XextCheckExtension (dpy, info, dri2ExtensionName, False);
551
552    LockDisplay(dpy);
553    GetReq(DRI2GetMSC, req);
554    req->reqType = info->codes->major_opcode;
555    req->dri2ReqType = X_DRI2GetMSC;
556    req->drawable = drawable;
557
558    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
559	UnlockDisplay(dpy);
560	SyncHandle();
561	return False;
562    }
563
564    *ust = vals_to_card64(rep.ust_lo, rep.ust_hi);
565    *msc = vals_to_card64(rep.msc_lo, rep.msc_hi);
566    *sbc = vals_to_card64(rep.sbc_lo, rep.sbc_hi);
567
568    UnlockDisplay(dpy);
569    SyncHandle();
570
571    return True;
572}
573#endif
574
575#ifdef X_DRI2WaitMSC
576static void
577load_msc_req(xDRI2WaitMSCReq *req, CARD64 target, CARD64 divisor,
578	     CARD64 remainder)
579{
580    req->target_msc_hi = target >> 32;
581    req->target_msc_lo = target & 0xffffffff;
582    req->divisor_hi = divisor >> 32;
583    req->divisor_lo = divisor & 0xffffffff;
584    req->remainder_hi = remainder >> 32;
585    req->remainder_lo = remainder & 0xffffffff;
586}
587
588Bool DRI2WaitMSC(Display *dpy, XID drawable, CARD64 target_msc, CARD64 divisor,
589		 CARD64 remainder, CARD64 *ust, CARD64 *msc, CARD64 *sbc)
590{
591    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
592    xDRI2WaitMSCReq *req;
593    xDRI2MSCReply rep;
594
595    XextCheckExtension (dpy, info, dri2ExtensionName, False);
596
597    LockDisplay(dpy);
598    GetReq(DRI2WaitMSC, req);
599    req->reqType = info->codes->major_opcode;
600    req->dri2ReqType = X_DRI2WaitMSC;
601    req->drawable = drawable;
602    load_msc_req(req, target_msc, divisor, remainder);
603
604    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
605	UnlockDisplay(dpy);
606	SyncHandle();
607	return False;
608    }
609
610    *ust = ((CARD64)rep.ust_hi << 32) | (CARD64)rep.ust_lo;
611    *msc = ((CARD64)rep.msc_hi << 32) | (CARD64)rep.msc_lo;
612    *sbc = ((CARD64)rep.sbc_hi << 32) | (CARD64)rep.sbc_lo;
613
614    UnlockDisplay(dpy);
615    SyncHandle();
616
617    return True;
618}
619#endif
620
621#ifdef X_DRI2WaitSBC
622static void
623load_sbc_req(xDRI2WaitSBCReq *req, CARD64 target)
624{
625    req->target_sbc_hi = target >> 32;
626    req->target_sbc_lo = target & 0xffffffff;
627}
628
629Bool DRI2WaitSBC(Display *dpy, XID drawable, CARD64 target_sbc, CARD64 *ust,
630		 CARD64 *msc, CARD64 *sbc)
631{
632    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
633    xDRI2WaitSBCReq *req;
634    xDRI2MSCReply rep;
635
636    XextCheckExtension (dpy, info, dri2ExtensionName, False);
637
638    LockDisplay(dpy);
639    GetReq(DRI2WaitSBC, req);
640    req->reqType = info->codes->major_opcode;
641    req->dri2ReqType = X_DRI2WaitSBC;
642    req->drawable = drawable;
643    load_sbc_req(req, target_sbc);
644
645    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
646	UnlockDisplay(dpy);
647	SyncHandle();
648	return False;
649    }
650
651    *ust = ((CARD64)rep.ust_hi << 32) | rep.ust_lo;
652    *msc = ((CARD64)rep.msc_hi << 32) | rep.msc_lo;
653    *sbc = ((CARD64)rep.sbc_hi << 32) | rep.sbc_lo;
654
655    UnlockDisplay(dpy);
656    SyncHandle();
657
658    return True;
659}
660#endif
661
662#ifdef X_DRI2SwapInterval
663void DRI2SwapInterval(Display *dpy, XID drawable, int interval)
664{
665    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
666    xDRI2SwapIntervalReq *req;
667
668    XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
669
670    LockDisplay(dpy);
671    GetReq(DRI2SwapInterval, req);
672    req->reqType = info->codes->major_opcode;
673    req->dri2ReqType = X_DRI2SwapInterval;
674    req->drawable = drawable;
675    req->interval = interval;
676    UnlockDisplay(dpy);
677    SyncHandle();
678}
679#endif
680
681#endif /* GLX_DIRECT_RENDERING */
682