dri2_glx.c revision 1ca968363dd55e919bd91c8fc31c34d207af3958 
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
55typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
56typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
57typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
58
59struct __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
73struct __GLXDRIcontextPrivateRec
74{
75   __GLXDRIcontext base;
76   __DRIcontext *driContext;
77   __GLXscreenConfigs *psc;
78};
79
80struct __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
91static void dri2WaitX(__GLXDRIdrawable * pdraw);
92
93static void
94dri2DestroyContext(__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
105static Bool
106dri2BindContext(__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
116static void
117dri2UnbindContext(__GLXDRIcontext * context)
118{
119   __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
120   const __DRIcoreExtension *core = pcp->psc->core;
121
122   (*core->unbindContext) (pcp->driContext);
123}
124
125static __GLXDRIcontext *
126dri2CreateContext(__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
161static void
162dri2DestroyDrawable(__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
171static __GLXDRIdrawable *
172dri2CreateDrawable(__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
205static int
206dri2DrawableGetMSC(__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
212static int
213dri2WaitForMSC(__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
220static int
221dri2WaitForSBC(__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
228static void
229dri2CopySubBuffer(__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
261static void
262dri2WaitX(__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
288static void
289dri2WaitGL(__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
314static void
315dri2FlushFrontBuffer(__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
329static void
330dri2DestroyScreen(__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 */
344static void
345process_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
370static int64_t
371dri2SwapBuffers(__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
403static __DRIbuffer *
404dri2GetBuffers(__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
426static __DRIbuffer *
427dri2GetBuffersWithFormat(__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
451static void
452dri2SetSwapInterval(__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
460static unsigned int
461dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
462{
463   __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
464
465  return priv->swap_interval;
466}
467
468static const __DRIdri2LoaderExtension dri2LoaderExtension = {
469   {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
470   dri2GetBuffers,
471   dri2FlushFrontBuffer,
472   dri2GetBuffersWithFormat,
473};
474
475static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
476   {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
477   dri2GetBuffers,
478   dri2FlushFrontBuffer,
479   NULL,
480};
481
482static const __DRIextension *loader_extensions[] = {
483   &dri2LoaderExtension.base,
484   &systemTimeExtension.base,
485   NULL
486};
487
488static const __DRIextension *loader_extensions_old[] = {
489   &dri2LoaderExtension_old.base,
490   &systemTimeExtension.base,
491   NULL
492};
493
494_X_HIDDEN void
495dri2InvalidateBuffers(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
505static __GLXDRIscreen *
506dri2CreateScreen(__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   /* Initialize per screen dynamic client GLX extensions */
523   psc->ext_list_first_time = GL_TRUE;
524
525   if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
526		    &driverName, &deviceName)) {
527      XFree(psp);
528      return NULL;
529   }
530
531   psc->driver = driOpenDriver(driverName);
532   if (psc->driver == NULL) {
533      ErrorMessageF("driver pointer missing\n");
534      goto handle_error;
535   }
536
537   extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
538   if (extensions == NULL) {
539      ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
540      goto handle_error;
541   }
542
543   for (i = 0; extensions[i]; i++) {
544      if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
545	 psc->core = (__DRIcoreExtension *) extensions[i];
546      if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
547	 psc->dri2 = (__DRIdri2Extension *) extensions[i];
548   }
549
550   if (psc->core == NULL || psc->dri2 == NULL) {
551      ErrorMessageF("core dri or dri2 extension not found\n");
552      goto handle_error;
553   }
554
555   psc->fd = open(deviceName, O_RDWR);
556   if (psc->fd < 0) {
557      ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
558      goto handle_error;
559   }
560
561   if (drmGetMagic(psc->fd, &magic)) {
562      ErrorMessageF("failed to get magic\n");
563      goto handle_error;
564   }
565
566   if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
567      ErrorMessageF("failed to authenticate magic %d\n", magic);
568      goto handle_error;
569   }
570
571   /* If the server does not support the protocol for
572    * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
573    */
574   psc->__driScreen =
575      psc->dri2->createNewScreen(screen, psc->fd, ((pdp->driMinor < 1)
576						   ? loader_extensions_old
577						   : loader_extensions),
578				 &driver_configs, psc);
579
580   if (psc->__driScreen == NULL) {
581      ErrorMessageF("failed to create dri screen\n");
582      goto handle_error;
583   }
584
585   driBindCommonExtensions(psc);
586   dri2BindExtensions(psc);
587
588   psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
589   psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
590
591   psc->driver_configs = driver_configs;
592
593   psp->destroyScreen = dri2DestroyScreen;
594   psp->createContext = dri2CreateContext;
595   psp->createDrawable = dri2CreateDrawable;
596   psp->swapBuffers = dri2SwapBuffers;
597   psp->waitGL = dri2WaitGL;
598   psp->waitX = dri2WaitX;
599   psp->getDrawableMSC = NULL;
600   psp->waitForMSC = NULL;
601   psp->waitForSBC = NULL;
602   psp->setSwapInterval = NULL;
603   psp->getSwapInterval = NULL;
604
605   if (pdp->driMinor >= 2) {
606#ifdef X_DRI2GetMSC
607      psp->getDrawableMSC = dri2DrawableGetMSC;
608#endif
609#ifdef X_DRI2WaitMSC
610      psp->waitForMSC = dri2WaitForMSC;
611      psp->waitForSBC = dri2WaitForSBC;
612#endif
613#ifdef X_DRI2SwapInterval
614      psp->setSwapInterval = dri2SetSwapInterval;
615      psp->getSwapInterval = dri2GetSwapInterval;
616#endif
617#if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
618      __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
619#endif
620   }
621
622   /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
623    * available.*/
624   psp->copySubBuffer = dri2CopySubBuffer;
625   __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
626
627   Xfree(driverName);
628   Xfree(deviceName);
629
630   return psp;
631
632handle_error:
633   Xfree(driverName);
634   Xfree(deviceName);
635   XFree(psp);
636
637   /* FIXME: clean up here */
638
639   return NULL;
640}
641
642/* Called from __glXFreeDisplayPrivate.
643 */
644static void
645dri2DestroyDisplay(__GLXDRIdisplay * dpy)
646{
647   Xfree(dpy);
648}
649
650/*
651 * Allocate, initialize and return a __DRIdisplayPrivate object.
652 * This is called from __glXInitialize() when we are given a new
653 * display pointer.
654 */
655_X_HIDDEN __GLXDRIdisplay *
656dri2CreateDisplay(Display * dpy)
657{
658   __GLXDRIdisplayPrivate *pdp;
659   int eventBase, errorBase;
660
661   if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
662      return NULL;
663
664   pdp = Xmalloc(sizeof *pdp);
665   if (pdp == NULL)
666      return NULL;
667
668   if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
669      Xfree(pdp);
670      return NULL;
671   }
672
673   pdp->driPatch = 0;
674   pdp->swapAvailable = (pdp->driMinor >= 2);
675   pdp->invalidateAvailable = (pdp->driMinor >= 3);
676
677   pdp->base.destroyDisplay = dri2DestroyDisplay;
678   pdp->base.createScreen = dri2CreateScreen;
679
680   return &pdp->base;
681}
682
683#endif /* GLX_DIRECT_RENDERING */
684