dri2.c revision c356f5867f2c1fad7155df538b9affa8dbdcf869 
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
92   XextCheckExtension(dpy, info, dri2ExtensionName, False);
93
94   switch ((wire->u.u.type & 0x7f) - info->codes->first_event) {
95
96#ifdef X_DRI2SwapBuffers
97   case DRI2_BufferSwapComplete:
98   {
99      GLXBufferSwapComplete *aevent = (GLXBufferSwapComplete *)event;
100      xDRI2BufferSwapComplete *awire = (xDRI2BufferSwapComplete *)wire;
101      __GLXDRIdrawable *pdraw;
102      struct glx_display *glx_dpy = __glXInitialize(dpy);
103
104      /* Ignore swap events if we're not looking for them */
105      pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, awire->drawable);
106      if (!(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
107	 return False;
108
109      aevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *) wire);
110      aevent->type = glx_dpy->codes->first_event + GLX_BufferSwapComplete;
111      aevent->send_event = (awire->type & 0x80) != 0;
112      aevent->display = dpy;
113      aevent->drawable = awire->drawable;
114      switch (awire->event_type) {
115      case DRI2_EXCHANGE_COMPLETE:
116	 aevent->event_type = GLX_EXCHANGE_COMPLETE_INTEL;
117	 break;
118      case DRI2_BLIT_COMPLETE:
119	 aevent->event_type = GLX_COPY_COMPLETE_INTEL;
120	 break;
121      case DRI2_FLIP_COMPLETE:
122	 aevent->event_type = GLX_FLIP_COMPLETE_INTEL;
123	 break;
124      default:
125	 /* unknown swap completion type */
126	 return False;
127      }
128      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
129      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
130      aevent->sbc = ((CARD64)awire->sbc_hi << 32) | awire->sbc_lo;
131      return True;
132   }
133#endif
134#ifdef DRI2_InvalidateBuffers
135   case DRI2_InvalidateBuffers:
136   {
137      xDRI2InvalidateBuffers *awire = (xDRI2InvalidateBuffers *)wire;
138
139      dri2InvalidateBuffers(dpy, awire->drawable);
140      return False;
141   }
142#endif
143   default:
144      /* client doesn't support server event */
145      break;
146   }
147
148   return False;
149}
150
151/* We don't actually support this.  It doesn't make sense for clients to
152 * send each other DRI2 events.
153 */
154static Status
155DRI2EventToWire(Display *dpy, XEvent *event, xEvent *wire)
156{
157   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
158
159   XextCheckExtension(dpy, info, dri2ExtensionName, False);
160
161   switch (event->type) {
162   default:
163      /* client doesn't support server event */
164      break;
165   }
166
167   return Success;
168}
169
170static int
171DRI2Error(Display *display, xError *err, XExtCodes *codes, int *ret_code)
172{
173    if (err->majorCode == codes->major_opcode &&
174	err->errorCode == BadDrawable &&
175	err->minorCode == X_DRI2CopyRegion)
176	return True;
177
178    return False;
179}
180
181Bool
182DRI2QueryExtension(Display * dpy, int *eventBase, int *errorBase)
183{
184   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
185
186   if (XextHasExtension(info)) {
187      *eventBase = info->codes->first_event;
188      *errorBase = info->codes->first_error;
189      return True;
190   }
191
192   return False;
193}
194
195Bool
196DRI2QueryVersion(Display * dpy, int *major, int *minor)
197{
198   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
199   xDRI2QueryVersionReply rep;
200   xDRI2QueryVersionReq *req;
201   int i, nevents;
202
203   XextCheckExtension(dpy, info, dri2ExtensionName, False);
204
205   LockDisplay(dpy);
206   GetReq(DRI2QueryVersion, req);
207   req->reqType = info->codes->major_opcode;
208   req->dri2ReqType = X_DRI2QueryVersion;
209   req->majorVersion = DRI2_MAJOR;
210   req->minorVersion = DRI2_MINOR;
211   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
212      UnlockDisplay(dpy);
213      SyncHandle();
214      return False;
215   }
216   *major = rep.majorVersion;
217   *minor = rep.minorVersion;
218   UnlockDisplay(dpy);
219   SyncHandle();
220
221   switch (rep.minorVersion) {
222   case 1:
223	   nevents = 0;
224	   break;
225   case 2:
226	   nevents = 1;
227	   break;
228   case 3:
229   default:
230	   nevents = 2;
231	   break;
232   }
233
234   for (i = 0; i < nevents; i++) {
235       XESetWireToEvent (dpy, info->codes->first_event + i, DRI2WireToEvent);
236       XESetEventToWire (dpy, info->codes->first_event + i, DRI2EventToWire);
237   }
238
239   return True;
240}
241
242Bool
243DRI2Connect(Display * dpy, XID window, char **driverName, char **deviceName)
244{
245   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
246   xDRI2ConnectReply rep;
247   xDRI2ConnectReq *req;
248
249   XextCheckExtension(dpy, info, dri2ExtensionName, False);
250
251   LockDisplay(dpy);
252   GetReq(DRI2Connect, req);
253   req->reqType = info->codes->major_opcode;
254   req->dri2ReqType = X_DRI2Connect;
255   req->window = window;
256   req->driverType = DRI2DriverDRI;
257   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
258      UnlockDisplay(dpy);
259      SyncHandle();
260      return False;
261   }
262
263   if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
264      UnlockDisplay(dpy);
265      SyncHandle();
266      return False;
267   }
268
269   *driverName = Xmalloc(rep.driverNameLength + 1);
270   if (*driverName == NULL) {
271      _XEatData(dpy,
272                ((rep.driverNameLength + 3) & ~3) +
273                ((rep.deviceNameLength + 3) & ~3));
274      UnlockDisplay(dpy);
275      SyncHandle();
276      return False;
277   }
278   _XReadPad(dpy, *driverName, rep.driverNameLength);
279   (*driverName)[rep.driverNameLength] = '\0';
280
281   *deviceName = Xmalloc(rep.deviceNameLength + 1);
282   if (*deviceName == NULL) {
283      Xfree(*driverName);
284      _XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
285      UnlockDisplay(dpy);
286      SyncHandle();
287      return False;
288   }
289   _XReadPad(dpy, *deviceName, rep.deviceNameLength);
290   (*deviceName)[rep.deviceNameLength] = '\0';
291
292   UnlockDisplay(dpy);
293   SyncHandle();
294
295   return True;
296}
297
298Bool
299DRI2Authenticate(Display * dpy, XID window, drm_magic_t magic)
300{
301   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
302   xDRI2AuthenticateReq *req;
303   xDRI2AuthenticateReply rep;
304
305   XextCheckExtension(dpy, info, dri2ExtensionName, False);
306
307   LockDisplay(dpy);
308   GetReq(DRI2Authenticate, req);
309   req->reqType = info->codes->major_opcode;
310   req->dri2ReqType = X_DRI2Authenticate;
311   req->window = window;
312   req->magic = magic;
313
314   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
315      UnlockDisplay(dpy);
316      SyncHandle();
317      return False;
318   }
319
320   UnlockDisplay(dpy);
321   SyncHandle();
322
323   return rep.authenticated;
324}
325
326void
327DRI2CreateDrawable(Display * dpy, XID drawable)
328{
329   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
330   xDRI2CreateDrawableReq *req;
331
332   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
333
334   LockDisplay(dpy);
335   GetReq(DRI2CreateDrawable, req);
336   req->reqType = info->codes->major_opcode;
337   req->dri2ReqType = X_DRI2CreateDrawable;
338   req->drawable = drawable;
339   UnlockDisplay(dpy);
340   SyncHandle();
341}
342
343void
344DRI2DestroyDrawable(Display * dpy, XID drawable)
345{
346   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
347   xDRI2DestroyDrawableReq *req;
348
349   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
350
351   XSync(dpy, False);
352
353   LockDisplay(dpy);
354   GetReq(DRI2DestroyDrawable, req);
355   req->reqType = info->codes->major_opcode;
356   req->dri2ReqType = X_DRI2DestroyDrawable;
357   req->drawable = drawable;
358   UnlockDisplay(dpy);
359   SyncHandle();
360}
361
362DRI2Buffer *
363DRI2GetBuffers(Display * dpy, XID drawable,
364               int *width, int *height,
365               unsigned int *attachments, int count, int *outCount)
366{
367   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
368   xDRI2GetBuffersReply rep;
369   xDRI2GetBuffersReq *req;
370   DRI2Buffer *buffers;
371   xDRI2Buffer repBuffer;
372   CARD32 *p;
373   int i;
374
375   XextCheckExtension(dpy, info, dri2ExtensionName, False);
376
377   LockDisplay(dpy);
378   GetReqExtra(DRI2GetBuffers, count * 4, req);
379   req->reqType = info->codes->major_opcode;
380   req->dri2ReqType = X_DRI2GetBuffers;
381   req->drawable = drawable;
382   req->count = count;
383   p = (CARD32 *) & req[1];
384   for (i = 0; i < count; i++)
385      p[i] = attachments[i];
386
387   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
388      UnlockDisplay(dpy);
389      SyncHandle();
390      return NULL;
391   }
392
393   *width = rep.width;
394   *height = rep.height;
395   *outCount = rep.count;
396
397   buffers = Xmalloc(rep.count * sizeof buffers[0]);
398   if (buffers == NULL) {
399      _XEatData(dpy, rep.count * sizeof repBuffer);
400      UnlockDisplay(dpy);
401      SyncHandle();
402      return NULL;
403   }
404
405   for (i = 0; i < rep.count; i++) {
406      _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
407      buffers[i].attachment = repBuffer.attachment;
408      buffers[i].name = repBuffer.name;
409      buffers[i].pitch = repBuffer.pitch;
410      buffers[i].cpp = repBuffer.cpp;
411      buffers[i].flags = repBuffer.flags;
412   }
413
414   UnlockDisplay(dpy);
415   SyncHandle();
416
417   return buffers;
418}
419
420
421DRI2Buffer *
422DRI2GetBuffersWithFormat(Display * dpy, XID drawable,
423                         int *width, int *height,
424                         unsigned int *attachments, int count, int *outCount)
425{
426   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
427   xDRI2GetBuffersReply rep;
428   xDRI2GetBuffersReq *req;
429   DRI2Buffer *buffers;
430   xDRI2Buffer repBuffer;
431   CARD32 *p;
432   int i;
433
434   XextCheckExtension(dpy, info, dri2ExtensionName, False);
435
436   LockDisplay(dpy);
437   GetReqExtra(DRI2GetBuffers, count * (4 * 2), req);
438   req->reqType = info->codes->major_opcode;
439   req->dri2ReqType = X_DRI2GetBuffersWithFormat;
440   req->drawable = drawable;
441   req->count = count;
442   p = (CARD32 *) & req[1];
443   for (i = 0; i < (count * 2); i++)
444      p[i] = attachments[i];
445
446   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
447      UnlockDisplay(dpy);
448      SyncHandle();
449      return NULL;
450   }
451
452   *width = rep.width;
453   *height = rep.height;
454   *outCount = rep.count;
455
456   buffers = Xmalloc(rep.count * sizeof buffers[0]);
457   if (buffers == NULL) {
458      _XEatData(dpy, rep.count * sizeof repBuffer);
459      UnlockDisplay(dpy);
460      SyncHandle();
461      return NULL;
462   }
463
464   for (i = 0; i < rep.count; i++) {
465      _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
466      buffers[i].attachment = repBuffer.attachment;
467      buffers[i].name = repBuffer.name;
468      buffers[i].pitch = repBuffer.pitch;
469      buffers[i].cpp = repBuffer.cpp;
470      buffers[i].flags = repBuffer.flags;
471   }
472
473   UnlockDisplay(dpy);
474   SyncHandle();
475
476   return buffers;
477}
478
479
480void
481DRI2CopyRegion(Display * dpy, XID drawable, XserverRegion region,
482               CARD32 dest, CARD32 src)
483{
484   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
485   xDRI2CopyRegionReq *req;
486   xDRI2CopyRegionReply rep;
487
488   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
489
490   LockDisplay(dpy);
491   GetReq(DRI2CopyRegion, req);
492   req->reqType = info->codes->major_opcode;
493   req->dri2ReqType = X_DRI2CopyRegion;
494   req->drawable = drawable;
495   req->region = region;
496   req->dest = dest;
497   req->src = src;
498
499   _XReply(dpy, (xReply *) & rep, 0, xFalse);
500
501   UnlockDisplay(dpy);
502   SyncHandle();
503}
504
505#ifdef X_DRI2SwapBuffers
506static void
507load_swap_req(xDRI2SwapBuffersReq *req, CARD64 target, CARD64 divisor,
508	     CARD64 remainder)
509{
510    req->target_msc_hi = target >> 32;
511    req->target_msc_lo = target & 0xffffffff;
512    req->divisor_hi = divisor >> 32;
513    req->divisor_lo = divisor & 0xffffffff;
514    req->remainder_hi = remainder >> 32;
515    req->remainder_lo = remainder & 0xffffffff;
516}
517
518static CARD64
519vals_to_card64(CARD32 lo, CARD32 hi)
520{
521    return (CARD64)hi << 32 | lo;
522}
523
524void DRI2SwapBuffers(Display *dpy, XID drawable, CARD64 target_msc,
525		     CARD64 divisor, CARD64 remainder, CARD64 *count)
526{
527    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
528    xDRI2SwapBuffersReq *req;
529    xDRI2SwapBuffersReply rep;
530
531    XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
532
533    LockDisplay(dpy);
534    GetReq(DRI2SwapBuffers, req);
535    req->reqType = info->codes->major_opcode;
536    req->dri2ReqType = X_DRI2SwapBuffers;
537    req->drawable = drawable;
538    load_swap_req(req, target_msc, divisor, remainder);
539
540    _XReply(dpy, (xReply *)&rep, 0, xFalse);
541
542    *count = vals_to_card64(rep.swap_lo, rep.swap_hi);
543
544    UnlockDisplay(dpy);
545    SyncHandle();
546}
547#endif
548
549#ifdef X_DRI2GetMSC
550Bool DRI2GetMSC(Display *dpy, XID drawable, CARD64 *ust, CARD64 *msc,
551		CARD64 *sbc)
552{
553    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
554    xDRI2GetMSCReq *req;
555    xDRI2MSCReply rep;
556
557    XextCheckExtension (dpy, info, dri2ExtensionName, False);
558
559    LockDisplay(dpy);
560    GetReq(DRI2GetMSC, req);
561    req->reqType = info->codes->major_opcode;
562    req->dri2ReqType = X_DRI2GetMSC;
563    req->drawable = drawable;
564
565    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
566	UnlockDisplay(dpy);
567	SyncHandle();
568	return False;
569    }
570
571    *ust = vals_to_card64(rep.ust_lo, rep.ust_hi);
572    *msc = vals_to_card64(rep.msc_lo, rep.msc_hi);
573    *sbc = vals_to_card64(rep.sbc_lo, rep.sbc_hi);
574
575    UnlockDisplay(dpy);
576    SyncHandle();
577
578    return True;
579}
580#endif
581
582#ifdef X_DRI2WaitMSC
583static void
584load_msc_req(xDRI2WaitMSCReq *req, CARD64 target, CARD64 divisor,
585	     CARD64 remainder)
586{
587    req->target_msc_hi = target >> 32;
588    req->target_msc_lo = target & 0xffffffff;
589    req->divisor_hi = divisor >> 32;
590    req->divisor_lo = divisor & 0xffffffff;
591    req->remainder_hi = remainder >> 32;
592    req->remainder_lo = remainder & 0xffffffff;
593}
594
595Bool DRI2WaitMSC(Display *dpy, XID drawable, CARD64 target_msc, CARD64 divisor,
596		 CARD64 remainder, CARD64 *ust, CARD64 *msc, CARD64 *sbc)
597{
598    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
599    xDRI2WaitMSCReq *req;
600    xDRI2MSCReply rep;
601
602    XextCheckExtension (dpy, info, dri2ExtensionName, False);
603
604    LockDisplay(dpy);
605    GetReq(DRI2WaitMSC, req);
606    req->reqType = info->codes->major_opcode;
607    req->dri2ReqType = X_DRI2WaitMSC;
608    req->drawable = drawable;
609    load_msc_req(req, target_msc, divisor, remainder);
610
611    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
612	UnlockDisplay(dpy);
613	SyncHandle();
614	return False;
615    }
616
617    *ust = ((CARD64)rep.ust_hi << 32) | (CARD64)rep.ust_lo;
618    *msc = ((CARD64)rep.msc_hi << 32) | (CARD64)rep.msc_lo;
619    *sbc = ((CARD64)rep.sbc_hi << 32) | (CARD64)rep.sbc_lo;
620
621    UnlockDisplay(dpy);
622    SyncHandle();
623
624    return True;
625}
626#endif
627
628#ifdef X_DRI2WaitSBC
629static void
630load_sbc_req(xDRI2WaitSBCReq *req, CARD64 target)
631{
632    req->target_sbc_hi = target >> 32;
633    req->target_sbc_lo = target & 0xffffffff;
634}
635
636Bool DRI2WaitSBC(Display *dpy, XID drawable, CARD64 target_sbc, CARD64 *ust,
637		 CARD64 *msc, CARD64 *sbc)
638{
639    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
640    xDRI2WaitSBCReq *req;
641    xDRI2MSCReply rep;
642
643    XextCheckExtension (dpy, info, dri2ExtensionName, False);
644
645    LockDisplay(dpy);
646    GetReq(DRI2WaitSBC, req);
647    req->reqType = info->codes->major_opcode;
648    req->dri2ReqType = X_DRI2WaitSBC;
649    req->drawable = drawable;
650    load_sbc_req(req, target_sbc);
651
652    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
653	UnlockDisplay(dpy);
654	SyncHandle();
655	return False;
656    }
657
658    *ust = ((CARD64)rep.ust_hi << 32) | rep.ust_lo;
659    *msc = ((CARD64)rep.msc_hi << 32) | rep.msc_lo;
660    *sbc = ((CARD64)rep.sbc_hi << 32) | rep.sbc_lo;
661
662    UnlockDisplay(dpy);
663    SyncHandle();
664
665    return True;
666}
667#endif
668
669#ifdef X_DRI2SwapInterval
670void DRI2SwapInterval(Display *dpy, XID drawable, int interval)
671{
672    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
673    xDRI2SwapIntervalReq *req;
674
675    XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
676
677    LockDisplay(dpy);
678    GetReq(DRI2SwapInterval, req);
679    req->reqType = info->codes->major_opcode;
680    req->dri2ReqType = X_DRI2SwapInterval;
681    req->drawable = drawable;
682    req->interval = interval;
683    UnlockDisplay(dpy);
684    SyncHandle();
685}
686#endif
687
688#endif /* GLX_DIRECT_RENDERING */
689