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   struct glx_drawable *glxDraw;
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      xDRI2BufferSwapComplete2 *awire = (xDRI2BufferSwapComplete2 *)wire;
102      __GLXDRIdrawable *pdraw;
103
104      pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, awire->drawable);
105
106      /* Ignore swap events if we're not looking for them */
107      aevent->type = dri2GetSwapEventType(dpy, awire->drawable);
108      if(!aevent->type)
109         return False;
110
111      aevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *) wire);
112      aevent->send_event = (awire->type & 0x80) != 0;
113      aevent->display = dpy;
114      aevent->drawable = awire->drawable;
115      switch (awire->event_type) {
116      case DRI2_EXCHANGE_COMPLETE:
117	 aevent->event_type = GLX_EXCHANGE_COMPLETE_INTEL;
118	 break;
119      case DRI2_BLIT_COMPLETE:
120	 aevent->event_type = GLX_COPY_COMPLETE_INTEL;
121	 break;
122      case DRI2_FLIP_COMPLETE:
123	 aevent->event_type = GLX_FLIP_COMPLETE_INTEL;
124	 break;
125      default:
126	 /* unknown swap completion type */
127	 return False;
128      }
129      aevent->ust = ((CARD64)awire->ust_hi << 32) | awire->ust_lo;
130      aevent->msc = ((CARD64)awire->msc_hi << 32) | awire->msc_lo;
131
132      glxDraw = GetGLXDrawable(dpy, pdraw->drawable);
133      if (awire->sbc < glxDraw->lastEventSbc)
134	 glxDraw->eventSbcWrap += 0x100000000;
135      glxDraw->lastEventSbc = awire->sbc;
136      aevent->sbc = awire->sbc + glxDraw->eventSbcWrap;
137
138      return True;
139   }
140#endif
141#ifdef DRI2_InvalidateBuffers
142   case DRI2_InvalidateBuffers:
143   {
144      xDRI2InvalidateBuffers *awire = (xDRI2InvalidateBuffers *)wire;
145
146      dri2InvalidateBuffers(dpy, awire->drawable);
147      return False;
148   }
149#endif
150   default:
151      /* client doesn't support server event */
152      break;
153   }
154
155   return False;
156}
157
158/* We don't actually support this.  It doesn't make sense for clients to
159 * send each other DRI2 events.
160 */
161static Status
162DRI2EventToWire(Display *dpy, XEvent *event, xEvent *wire)
163{
164   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
165
166   XextCheckExtension(dpy, info, dri2ExtensionName, False);
167
168   switch (event->type) {
169   default:
170      /* client doesn't support server event */
171      break;
172   }
173
174   return Success;
175}
176
177static int
178DRI2Error(Display *display, xError *err, XExtCodes *codes, int *ret_code)
179{
180    if (err->majorCode == codes->major_opcode &&
181	err->errorCode == BadDrawable &&
182	err->minorCode == X_DRI2CopyRegion)
183	return True;
184
185    /* If the X drawable was destroyed before the GLX drawable, the
186     * DRI2 drawble will be gone by the time we call
187     * DRI2DestroyDrawable.  So just ignore BadDrawable here. */
188    if (err->majorCode == codes->major_opcode &&
189	err->errorCode == BadDrawable &&
190	err->minorCode == X_DRI2DestroyDrawable)
191	return True;
192
193    /* If the server is non-local DRI2Connect will raise BadRequest.
194     * Swallow this so that DRI2Connect can signal this in its return code */
195    if (err->majorCode == codes->major_opcode &&
196        err->minorCode == X_DRI2Connect &&
197        err->errorCode == BadRequest) {
198	*ret_code = False;
199	return True;
200    }
201
202    return False;
203}
204
205Bool
206DRI2QueryExtension(Display * dpy, int *eventBase, int *errorBase)
207{
208   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
209
210   if (XextHasExtension(info)) {
211      *eventBase = info->codes->first_event;
212      *errorBase = info->codes->first_error;
213      return True;
214   }
215
216   return False;
217}
218
219Bool
220DRI2QueryVersion(Display * dpy, int *major, int *minor)
221{
222   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
223   xDRI2QueryVersionReply rep;
224   xDRI2QueryVersionReq *req;
225   int i, nevents;
226
227   XextCheckExtension(dpy, info, dri2ExtensionName, False);
228
229   LockDisplay(dpy);
230   GetReq(DRI2QueryVersion, req);
231   req->reqType = info->codes->major_opcode;
232   req->dri2ReqType = X_DRI2QueryVersion;
233   req->majorVersion = DRI2_MAJOR;
234   req->minorVersion = DRI2_MINOR;
235   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
236      UnlockDisplay(dpy);
237      SyncHandle();
238      return False;
239   }
240   *major = rep.majorVersion;
241   *minor = rep.minorVersion;
242   UnlockDisplay(dpy);
243   SyncHandle();
244
245   switch (rep.minorVersion) {
246   case 1:
247	   nevents = 0;
248	   break;
249   case 2:
250	   nevents = 1;
251	   break;
252   case 3:
253   default:
254	   nevents = 2;
255	   break;
256   }
257
258   for (i = 0; i < nevents; i++) {
259       XESetWireToEvent (dpy, info->codes->first_event + i, DRI2WireToEvent);
260       XESetEventToWire (dpy, info->codes->first_event + i, DRI2EventToWire);
261   }
262
263   return True;
264}
265
266Bool
267DRI2Connect(Display * dpy, XID window, char **driverName, char **deviceName)
268{
269   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
270   xDRI2ConnectReply rep;
271   xDRI2ConnectReq *req;
272   char *prime;
273
274   XextCheckExtension(dpy, info, dri2ExtensionName, False);
275
276   LockDisplay(dpy);
277   GetReq(DRI2Connect, req);
278   req->reqType = info->codes->major_opcode;
279   req->dri2ReqType = X_DRI2Connect;
280   req->window = window;
281
282   req->driverType = DRI2DriverDRI;
283#ifdef DRI2DriverPrimeShift
284   prime = getenv("DRI_PRIME");
285   if (prime) {
286      uint32_t primeid;
287      errno = 0;
288      primeid = strtoul(prime, NULL, 0);
289      if (errno == 0)
290         req->driverType |= ((primeid & DRI2DriverPrimeMask) << DRI2DriverPrimeShift);
291   }
292#endif
293
294   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
295      UnlockDisplay(dpy);
296      SyncHandle();
297      return False;
298   }
299
300   if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
301      UnlockDisplay(dpy);
302      SyncHandle();
303      return False;
304   }
305
306   *driverName = Xmalloc(rep.driverNameLength + 1);
307   if (*driverName == NULL) {
308      _XEatData(dpy,
309                ((rep.driverNameLength + 3) & ~3) +
310                ((rep.deviceNameLength + 3) & ~3));
311      UnlockDisplay(dpy);
312      SyncHandle();
313      return False;
314   }
315   _XReadPad(dpy, *driverName, rep.driverNameLength);
316   (*driverName)[rep.driverNameLength] = '\0';
317
318   *deviceName = Xmalloc(rep.deviceNameLength + 1);
319   if (*deviceName == NULL) {
320      Xfree(*driverName);
321      _XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
322      UnlockDisplay(dpy);
323      SyncHandle();
324      return False;
325   }
326   _XReadPad(dpy, *deviceName, rep.deviceNameLength);
327   (*deviceName)[rep.deviceNameLength] = '\0';
328
329   UnlockDisplay(dpy);
330   SyncHandle();
331
332   return True;
333}
334
335Bool
336DRI2Authenticate(Display * dpy, XID window, drm_magic_t magic)
337{
338   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
339   xDRI2AuthenticateReq *req;
340   xDRI2AuthenticateReply rep;
341
342   XextCheckExtension(dpy, info, dri2ExtensionName, False);
343
344   LockDisplay(dpy);
345   GetReq(DRI2Authenticate, req);
346   req->reqType = info->codes->major_opcode;
347   req->dri2ReqType = X_DRI2Authenticate;
348   req->window = window;
349   req->magic = magic;
350
351   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
352      UnlockDisplay(dpy);
353      SyncHandle();
354      return False;
355   }
356
357   UnlockDisplay(dpy);
358   SyncHandle();
359
360   return rep.authenticated;
361}
362
363void
364DRI2CreateDrawable(Display * dpy, XID drawable)
365{
366   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
367   xDRI2CreateDrawableReq *req;
368
369   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
370
371   LockDisplay(dpy);
372   GetReq(DRI2CreateDrawable, req);
373   req->reqType = info->codes->major_opcode;
374   req->dri2ReqType = X_DRI2CreateDrawable;
375   req->drawable = drawable;
376   UnlockDisplay(dpy);
377   SyncHandle();
378}
379
380void
381DRI2DestroyDrawable(Display * dpy, XID drawable)
382{
383   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
384   xDRI2DestroyDrawableReq *req;
385
386   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
387
388   XSync(dpy, False);
389
390   LockDisplay(dpy);
391   GetReq(DRI2DestroyDrawable, req);
392   req->reqType = info->codes->major_opcode;
393   req->dri2ReqType = X_DRI2DestroyDrawable;
394   req->drawable = drawable;
395   UnlockDisplay(dpy);
396   SyncHandle();
397}
398
399DRI2Buffer *
400DRI2GetBuffers(Display * dpy, XID drawable,
401               int *width, int *height,
402               unsigned int *attachments, int count, int *outCount)
403{
404   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
405   xDRI2GetBuffersReply rep;
406   xDRI2GetBuffersReq *req;
407   DRI2Buffer *buffers;
408   xDRI2Buffer repBuffer;
409   CARD32 *p;
410   int i;
411
412   XextCheckExtension(dpy, info, dri2ExtensionName, False);
413
414   LockDisplay(dpy);
415   GetReqExtra(DRI2GetBuffers, count * 4, req);
416   req->reqType = info->codes->major_opcode;
417   req->dri2ReqType = X_DRI2GetBuffers;
418   req->drawable = drawable;
419   req->count = count;
420   p = (CARD32 *) & req[1];
421   for (i = 0; i < count; i++)
422      p[i] = attachments[i];
423
424   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
425      UnlockDisplay(dpy);
426      SyncHandle();
427      return NULL;
428   }
429
430   *width = rep.width;
431   *height = rep.height;
432   *outCount = rep.count;
433
434   buffers = Xmalloc(rep.count * sizeof buffers[0]);
435   if (buffers == NULL) {
436      _XEatData(dpy, rep.count * sizeof repBuffer);
437      UnlockDisplay(dpy);
438      SyncHandle();
439      return NULL;
440   }
441
442   for (i = 0; i < rep.count; i++) {
443      _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
444      buffers[i].attachment = repBuffer.attachment;
445      buffers[i].name = repBuffer.name;
446      buffers[i].pitch = repBuffer.pitch;
447      buffers[i].cpp = repBuffer.cpp;
448      buffers[i].flags = repBuffer.flags;
449   }
450
451   UnlockDisplay(dpy);
452   SyncHandle();
453
454   return buffers;
455}
456
457
458DRI2Buffer *
459DRI2GetBuffersWithFormat(Display * dpy, XID drawable,
460                         int *width, int *height,
461                         unsigned int *attachments, int count, int *outCount)
462{
463   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
464   xDRI2GetBuffersReply rep;
465   xDRI2GetBuffersReq *req;
466   DRI2Buffer *buffers;
467   xDRI2Buffer repBuffer;
468   CARD32 *p;
469   int i;
470
471   XextCheckExtension(dpy, info, dri2ExtensionName, False);
472
473   LockDisplay(dpy);
474   GetReqExtra(DRI2GetBuffers, count * (4 * 2), req);
475   req->reqType = info->codes->major_opcode;
476   req->dri2ReqType = X_DRI2GetBuffersWithFormat;
477   req->drawable = drawable;
478   req->count = count;
479   p = (CARD32 *) & req[1];
480   for (i = 0; i < (count * 2); i++)
481      p[i] = attachments[i];
482
483   if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
484      UnlockDisplay(dpy);
485      SyncHandle();
486      return NULL;
487   }
488
489   *width = rep.width;
490   *height = rep.height;
491   *outCount = rep.count;
492
493   buffers = Xmalloc(rep.count * sizeof buffers[0]);
494   if (buffers == NULL) {
495      _XEatData(dpy, rep.count * sizeof repBuffer);
496      UnlockDisplay(dpy);
497      SyncHandle();
498      return NULL;
499   }
500
501   for (i = 0; i < rep.count; i++) {
502      _XReadPad(dpy, (char *) &repBuffer, sizeof repBuffer);
503      buffers[i].attachment = repBuffer.attachment;
504      buffers[i].name = repBuffer.name;
505      buffers[i].pitch = repBuffer.pitch;
506      buffers[i].cpp = repBuffer.cpp;
507      buffers[i].flags = repBuffer.flags;
508   }
509
510   UnlockDisplay(dpy);
511   SyncHandle();
512
513   return buffers;
514}
515
516
517void
518DRI2CopyRegion(Display * dpy, XID drawable, XserverRegion region,
519               CARD32 dest, CARD32 src)
520{
521   XExtDisplayInfo *info = DRI2FindDisplay(dpy);
522   xDRI2CopyRegionReq *req;
523   xDRI2CopyRegionReply rep;
524
525   XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
526
527   LockDisplay(dpy);
528   GetReq(DRI2CopyRegion, req);
529   req->reqType = info->codes->major_opcode;
530   req->dri2ReqType = X_DRI2CopyRegion;
531   req->drawable = drawable;
532   req->region = region;
533   req->dest = dest;
534   req->src = src;
535
536   _XReply(dpy, (xReply *) & rep, 0, xFalse);
537
538   UnlockDisplay(dpy);
539   SyncHandle();
540}
541
542#ifdef X_DRI2SwapBuffers
543static void
544load_swap_req(xDRI2SwapBuffersReq *req, CARD64 target, CARD64 divisor,
545	     CARD64 remainder)
546{
547    req->target_msc_hi = target >> 32;
548    req->target_msc_lo = target & 0xffffffff;
549    req->divisor_hi = divisor >> 32;
550    req->divisor_lo = divisor & 0xffffffff;
551    req->remainder_hi = remainder >> 32;
552    req->remainder_lo = remainder & 0xffffffff;
553}
554
555static CARD64
556vals_to_card64(CARD32 lo, CARD32 hi)
557{
558    return (CARD64)hi << 32 | lo;
559}
560
561void DRI2SwapBuffers(Display *dpy, XID drawable, CARD64 target_msc,
562		     CARD64 divisor, CARD64 remainder, CARD64 *count)
563{
564    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
565    xDRI2SwapBuffersReq *req;
566    xDRI2SwapBuffersReply rep;
567
568    XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
569
570    LockDisplay(dpy);
571    GetReq(DRI2SwapBuffers, req);
572    req->reqType = info->codes->major_opcode;
573    req->dri2ReqType = X_DRI2SwapBuffers;
574    req->drawable = drawable;
575    load_swap_req(req, target_msc, divisor, remainder);
576
577    _XReply(dpy, (xReply *)&rep, 0, xFalse);
578
579    *count = vals_to_card64(rep.swap_lo, rep.swap_hi);
580
581    UnlockDisplay(dpy);
582    SyncHandle();
583}
584#endif
585
586#ifdef X_DRI2GetMSC
587Bool DRI2GetMSC(Display *dpy, XID drawable, CARD64 *ust, CARD64 *msc,
588		CARD64 *sbc)
589{
590    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
591    xDRI2GetMSCReq *req;
592    xDRI2MSCReply rep;
593
594    XextCheckExtension (dpy, info, dri2ExtensionName, False);
595
596    LockDisplay(dpy);
597    GetReq(DRI2GetMSC, req);
598    req->reqType = info->codes->major_opcode;
599    req->dri2ReqType = X_DRI2GetMSC;
600    req->drawable = drawable;
601
602    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
603	UnlockDisplay(dpy);
604	SyncHandle();
605	return False;
606    }
607
608    *ust = vals_to_card64(rep.ust_lo, rep.ust_hi);
609    *msc = vals_to_card64(rep.msc_lo, rep.msc_hi);
610    *sbc = vals_to_card64(rep.sbc_lo, rep.sbc_hi);
611
612    UnlockDisplay(dpy);
613    SyncHandle();
614
615    return True;
616}
617#endif
618
619#ifdef X_DRI2WaitMSC
620static void
621load_msc_req(xDRI2WaitMSCReq *req, CARD64 target, CARD64 divisor,
622	     CARD64 remainder)
623{
624    req->target_msc_hi = target >> 32;
625    req->target_msc_lo = target & 0xffffffff;
626    req->divisor_hi = divisor >> 32;
627    req->divisor_lo = divisor & 0xffffffff;
628    req->remainder_hi = remainder >> 32;
629    req->remainder_lo = remainder & 0xffffffff;
630}
631
632Bool DRI2WaitMSC(Display *dpy, XID drawable, CARD64 target_msc, CARD64 divisor,
633		 CARD64 remainder, CARD64 *ust, CARD64 *msc, CARD64 *sbc)
634{
635    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
636    xDRI2WaitMSCReq *req;
637    xDRI2MSCReply rep;
638
639    XextCheckExtension (dpy, info, dri2ExtensionName, False);
640
641    LockDisplay(dpy);
642    GetReq(DRI2WaitMSC, req);
643    req->reqType = info->codes->major_opcode;
644    req->dri2ReqType = X_DRI2WaitMSC;
645    req->drawable = drawable;
646    load_msc_req(req, target_msc, divisor, remainder);
647
648    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
649	UnlockDisplay(dpy);
650	SyncHandle();
651	return False;
652    }
653
654    *ust = ((CARD64)rep.ust_hi << 32) | (CARD64)rep.ust_lo;
655    *msc = ((CARD64)rep.msc_hi << 32) | (CARD64)rep.msc_lo;
656    *sbc = ((CARD64)rep.sbc_hi << 32) | (CARD64)rep.sbc_lo;
657
658    UnlockDisplay(dpy);
659    SyncHandle();
660
661    return True;
662}
663#endif
664
665#ifdef X_DRI2WaitSBC
666static void
667load_sbc_req(xDRI2WaitSBCReq *req, CARD64 target)
668{
669    req->target_sbc_hi = target >> 32;
670    req->target_sbc_lo = target & 0xffffffff;
671}
672
673Bool DRI2WaitSBC(Display *dpy, XID drawable, CARD64 target_sbc, CARD64 *ust,
674		 CARD64 *msc, CARD64 *sbc)
675{
676    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
677    xDRI2WaitSBCReq *req;
678    xDRI2MSCReply rep;
679
680    XextCheckExtension (dpy, info, dri2ExtensionName, False);
681
682    LockDisplay(dpy);
683    GetReq(DRI2WaitSBC, req);
684    req->reqType = info->codes->major_opcode;
685    req->dri2ReqType = X_DRI2WaitSBC;
686    req->drawable = drawable;
687    load_sbc_req(req, target_sbc);
688
689    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
690	UnlockDisplay(dpy);
691	SyncHandle();
692	return False;
693    }
694
695    *ust = ((CARD64)rep.ust_hi << 32) | rep.ust_lo;
696    *msc = ((CARD64)rep.msc_hi << 32) | rep.msc_lo;
697    *sbc = ((CARD64)rep.sbc_hi << 32) | rep.sbc_lo;
698
699    UnlockDisplay(dpy);
700    SyncHandle();
701
702    return True;
703}
704#endif
705
706#ifdef X_DRI2SwapInterval
707void DRI2SwapInterval(Display *dpy, XID drawable, int interval)
708{
709    XExtDisplayInfo *info = DRI2FindDisplay(dpy);
710    xDRI2SwapIntervalReq *req;
711
712    XextSimpleCheckExtension (dpy, info, dri2ExtensionName);
713
714    LockDisplay(dpy);
715    GetReq(DRI2SwapInterval, req);
716    req->reqType = info->codes->major_opcode;
717    req->dri2ReqType = X_DRI2SwapInterval;
718    req->drawable = drawable;
719    req->interval = interval;
720    UnlockDisplay(dpy);
721    SyncHandle();
722}
723#endif
724
725#endif /* GLX_DIRECT_RENDERING */
726