xref: /third_party/mesa3d/src/glx/dri2_glx.c (revision bf215546) 
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#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
34
35#include <X11/Xlib.h>
36#include <X11/extensions/Xfixes.h>
37#include <X11/Xlib-xcb.h>
38#include <xcb/xcb.h>
39#include <xcb/dri2.h>
40#include "glxclient.h"
41#include <X11/extensions/dri2proto.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 <sys/time.h>
48#include "dri2.h"
49#include "dri_common.h"
50#include "dri2_priv.h"
51#include "loader.h"
52#include "loader_dri_helper.h"
53
54#undef DRI2_MINOR
55#define DRI2_MINOR 1
56
57struct dri2_display
58{
59   __GLXDRIdisplay base;
60
61   __glxHashTable *dri2Hash;
62
63   const __DRIextension *loader_extensions[5];
64};
65
66struct dri2_drawable
67{
68   __GLXDRIdrawable base;
69   __DRIdrawable *driDrawable;
70   __DRIbuffer buffers[5];
71   int bufferCount;
72   int width, height;
73   int have_back;
74   int have_fake_front;
75   int swap_interval;
76
77   uint64_t previous_time;
78   unsigned frames;
79};
80
81static const struct glx_context_vtable dri2_context_vtable;
82
83/* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
84 * low halves separately.  This helps you split them.
85 */
86static void
87split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
88{
89   *hi = (counter >> 32);
90   *lo = counter & 0xffffffff;
91}
92
93static uint64_t
94merge_counter(uint32_t hi, uint32_t lo)
95{
96   return ((uint64_t)hi << 32) | lo;
97}
98
99static void
100dri2_destroy_context(struct glx_context *context)
101{
102   struct dri2_context *pcp = (struct dri2_context *) context;
103   struct dri2_screen *psc = (struct dri2_screen *) context->psc;
104
105   driReleaseDrawables(&pcp->base);
106
107   free((char *) context->extensions);
108
109   (*psc->core->destroyContext) (pcp->driContext);
110
111   free(pcp);
112}
113
114static Bool
115dri2_bind_context(struct glx_context *context, struct glx_context *old,
116		  GLXDrawable draw, GLXDrawable read)
117{
118   struct dri2_context *pcp = (struct dri2_context *) context;
119   struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
120   struct dri2_drawable *pdraw, *pread;
121   __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
122
123   pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
124   pread = (struct dri2_drawable *) driFetchDrawable(context, read);
125
126   driReleaseDrawables(old);
127
128   if (pdraw)
129      dri_draw = pdraw->driDrawable;
130   else if (draw != None)
131      return GLXBadDrawable;
132
133   if (pread)
134      dri_read = pread->driDrawable;
135   else if (read != None)
136      return GLXBadDrawable;
137
138   if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
139      return GLXBadContext;
140
141   return Success;
142}
143
144static void
145dri2_unbind_context(struct glx_context *context, struct glx_context *new)
146{
147   struct dri2_context *pcp = (struct dri2_context *) context;
148   struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
149
150   (*psc->core->unbindContext) (pcp->driContext);
151}
152
153static struct glx_context *
154dri2_create_context_attribs(struct glx_screen *base,
155			    struct glx_config *config_base,
156			    struct glx_context *shareList,
157			    unsigned num_attribs,
158			    const uint32_t *attribs,
159			    unsigned *error)
160{
161   struct dri2_context *pcp = NULL;
162   struct dri2_context *pcp_shared = NULL;
163   struct dri2_screen *psc = (struct dri2_screen *) base;
164   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
165   __DRIcontext *shared = NULL;
166
167   struct dri_ctx_attribs dca;
168   uint32_t ctx_attribs[2 * 6];
169   unsigned num_ctx_attribs = 0;
170
171   *error = dri_convert_glx_attribs(num_attribs, attribs, &dca);
172   if (*error != __DRI_CTX_ERROR_SUCCESS)
173      goto error_exit;
174
175   /* Check the renderType value */
176   if (!validate_renderType_against_config(config_base, dca.render_type))
177       goto error_exit;
178
179   if (shareList) {
180      /* We can't share with an indirect context */
181      if (!shareList->isDirect)
182         return NULL;
183
184      /* The GLX_ARB_create_context_no_error specs say:
185       *
186       *    BadMatch is generated if the value of GLX_CONTEXT_OPENGL_NO_ERROR_ARB
187       *    used to create <share_context> does not match the value of
188       *    GLX_CONTEXT_OPENGL_NO_ERROR_ARB for the context being created.
189       */
190      if (!!shareList->noError != !!dca.no_error) {
191         *error = __DRI_CTX_ERROR_BAD_FLAG;
192         return NULL;
193      }
194
195      pcp_shared = (struct dri2_context *) shareList;
196      shared = pcp_shared->driContext;
197   }
198
199   pcp = calloc(1, sizeof *pcp);
200   if (pcp == NULL) {
201      *error = __DRI_CTX_ERROR_NO_MEMORY;
202      goto error_exit;
203   }
204
205   if (!glx_context_init(&pcp->base, &psc->base, config_base))
206      goto error_exit;
207
208   ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
209   ctx_attribs[num_ctx_attribs++] = dca.major_ver;
210   ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
211   ctx_attribs[num_ctx_attribs++] = dca.minor_ver;
212
213   /* Only send a value when the non-default value is requested.  By doing
214    * this we don't have to check the driver's DRI2 version before sending the
215    * default value.
216    */
217   if (dca.reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
218      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
219      ctx_attribs[num_ctx_attribs++] = dca.reset;
220   }
221
222   if (dca.release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
223      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
224      ctx_attribs[num_ctx_attribs++] = dca.release;
225   }
226
227   if (dca.no_error) {
228      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_NO_ERROR;
229      ctx_attribs[num_ctx_attribs++] = dca.no_error;
230      pcp->base.noError = GL_TRUE;
231   }
232
233   if (dca.flags != 0) {
234      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
235      ctx_attribs[num_ctx_attribs++] = dca.flags;
236   }
237
238   /* The renderType is retrieved from attribs, or set to default
239    *  of GLX_RGBA_TYPE.
240    */
241   pcp->base.renderType = dca.render_type;
242
243   pcp->driContext =
244      (*psc->dri2->createContextAttribs) (psc->driScreen,
245					  dca.api,
246					  config ? config->driConfig : NULL,
247					  shared,
248					  num_ctx_attribs / 2,
249					  ctx_attribs,
250					  error,
251					  pcp);
252
253   if (pcp->driContext == NULL)
254      goto error_exit;
255
256   pcp->base.vtable = base->context_vtable;
257
258   return &pcp->base;
259
260error_exit:
261   free(pcp);
262
263   return NULL;
264}
265
266static void
267dri2DestroyDrawable(__GLXDRIdrawable *base)
268{
269   struct dri2_screen *psc = (struct dri2_screen *) base->psc;
270   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
271   struct glx_display *dpyPriv = psc->base.display;
272   struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
273
274   __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
275   (*psc->core->destroyDrawable) (pdraw->driDrawable);
276
277   /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
278    * now, as the application explicitly asked to destroy the GLX
279    * drawable.  Otherwise, for legacy drawables, we let the DRI2
280    * drawable linger on the server, since there's no good way of
281    * knowing when the application is done with it.  The server will
282    * destroy the DRI2 drawable when it destroys the X drawable or the
283    * client exits anyway. */
284   if (pdraw->base.xDrawable != pdraw->base.drawable)
285      DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
286
287   free(pdraw);
288}
289
290static __GLXDRIdrawable *
291dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
292                   GLXDrawable drawable, int type,
293                   struct glx_config *config_base)
294{
295   struct dri2_drawable *pdraw;
296   struct dri2_screen *psc = (struct dri2_screen *) base;
297   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
298   struct glx_display *dpyPriv;
299   struct dri2_display *pdp;
300
301   dpyPriv = __glXInitialize(psc->base.dpy);
302   if (dpyPriv == NULL)
303      return NULL;
304
305   pdraw = calloc(1, sizeof(*pdraw));
306   if (!pdraw)
307      return NULL;
308
309   pdraw->base.destroyDrawable = dri2DestroyDrawable;
310   pdraw->base.xDrawable = xDrawable;
311   pdraw->base.drawable = drawable;
312   pdraw->base.psc = &psc->base;
313   pdraw->bufferCount = 0;
314   pdraw->swap_interval = dri_get_initial_swap_interval(psc->driScreen, psc->config);
315   pdraw->have_back = 0;
316
317   DRI2CreateDrawable(psc->base.dpy, xDrawable);
318   pdp = (struct dri2_display *)dpyPriv->dri2Display;
319   /* Create a new drawable */
320   pdraw->driDrawable =
321      (*psc->dri2->createNewDrawable) (psc->driScreen,
322                                       config->driConfig, pdraw);
323
324   if (!pdraw->driDrawable) {
325      DRI2DestroyDrawable(psc->base.dpy, xDrawable);
326      free(pdraw);
327      return NULL;
328   }
329
330   if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
331      (*psc->core->destroyDrawable) (pdraw->driDrawable);
332      DRI2DestroyDrawable(psc->base.dpy, xDrawable);
333      free(pdraw);
334      return None;
335   }
336
337   /*
338    * Make sure server has the same swap interval we do for the new
339    * drawable.
340    */
341   if (psc->vtable.setSwapInterval)
342      psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval);
343
344   return &pdraw->base;
345}
346
347static int
348dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
349		   int64_t *ust, int64_t *msc, int64_t *sbc)
350{
351   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
352   xcb_dri2_get_msc_cookie_t get_msc_cookie;
353   xcb_dri2_get_msc_reply_t *get_msc_reply;
354
355   get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
356   get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
357
358   if (!get_msc_reply)
359      return 0;
360
361   *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
362   *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
363   *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
364   free(get_msc_reply);
365
366   return 1;
367}
368
369static int
370dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
371	       int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
372{
373   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
374   xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
375   xcb_dri2_wait_msc_reply_t *wait_msc_reply;
376   uint32_t target_msc_hi, target_msc_lo;
377   uint32_t divisor_hi, divisor_lo;
378   uint32_t remainder_hi, remainder_lo;
379
380   split_counter(target_msc, &target_msc_hi, &target_msc_lo);
381   split_counter(divisor, &divisor_hi, &divisor_lo);
382   split_counter(remainder, &remainder_hi, &remainder_lo);
383
384   wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
385                                                 target_msc_hi, target_msc_lo,
386                                                 divisor_hi, divisor_lo,
387                                                 remainder_hi, remainder_lo);
388   wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
389
390   if (!wait_msc_reply)
391      return 0;
392
393   *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
394   *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
395   *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
396   free(wait_msc_reply);
397
398   return 1;
399}
400
401static int
402dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
403	       int64_t *msc, int64_t *sbc)
404{
405   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
406   xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
407   xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
408   uint32_t target_sbc_hi, target_sbc_lo;
409
410   split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
411
412   wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
413                                                 target_sbc_hi, target_sbc_lo);
414   wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
415
416   if (!wait_sbc_reply)
417      return 0;
418
419   *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
420   *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
421   *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
422   free(wait_sbc_reply);
423
424   return 1;
425}
426
427static __DRIcontext *
428dri2GetCurrentContext()
429{
430   struct glx_context *gc = __glXGetCurrentContext();
431   struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
432
433   return (gc != &dummyContext) ? dri2Ctx->driContext : NULL;
434}
435
436/**
437 * dri2Throttle - Request driver throttling
438 *
439 * This function uses the DRI2 throttle extension to give the
440 * driver the opportunity to throttle on flush front, copysubbuffer
441 * and swapbuffers.
442 */
443static void
444dri2Throttle(struct dri2_screen *psc,
445	     struct dri2_drawable *draw,
446	     enum __DRI2throttleReason reason)
447{
448   if (psc->throttle) {
449      __DRIcontext *ctx = dri2GetCurrentContext();
450
451      psc->throttle->throttle(ctx, draw->driDrawable, reason);
452   }
453}
454
455/**
456 * Asks the driver to flush any queued work necessary for serializing with the
457 * X command stream, and optionally the slightly more strict requirement of
458 * glFlush() equivalence (which would require flushing even if nothing had
459 * been drawn to a window system framebuffer, for example).
460 */
461static void
462dri2Flush(struct dri2_screen *psc,
463          __DRIcontext *ctx,
464          struct dri2_drawable *draw,
465          unsigned flags,
466          enum __DRI2throttleReason throttle_reason)
467{
468   if (ctx && psc->f && psc->f->base.version >= 4) {
469      psc->f->flush_with_flags(ctx, draw->driDrawable, flags, throttle_reason);
470   } else {
471      if (flags & __DRI2_FLUSH_CONTEXT)
472         glFlush();
473
474      if (psc->f)
475         psc->f->flush(draw->driDrawable);
476
477      dri2Throttle(psc, draw, throttle_reason);
478   }
479}
480
481static void
482__dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
483		    int width, int height,
484		    enum __DRI2throttleReason reason, Bool flush)
485{
486   struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
487   struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
488   XRectangle xrect;
489   XserverRegion region;
490   __DRIcontext *ctx = dri2GetCurrentContext();
491   unsigned flags;
492
493   /* Check we have the right attachments */
494   if (!priv->have_back)
495      return;
496
497   xrect.x = x;
498   xrect.y = priv->height - y - height;
499   xrect.width = width;
500   xrect.height = height;
501
502   flags = __DRI2_FLUSH_DRAWABLE;
503   if (flush)
504      flags |= __DRI2_FLUSH_CONTEXT;
505   dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_COPYSUBBUFFER);
506
507   region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
508   DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
509                  DRI2BufferFrontLeft, DRI2BufferBackLeft);
510
511   /* Refresh the fake front (if present) after we just damaged the real
512    * front.
513    */
514   if (priv->have_fake_front)
515      DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
516		     DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
517
518   XFixesDestroyRegion(psc->base.dpy, region);
519}
520
521static void
522dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
523		  int width, int height, Bool flush)
524{
525   __dri2CopySubBuffer(pdraw, x, y, width, height,
526		       __DRI2_THROTTLE_COPYSUBBUFFER, flush);
527}
528
529
530static void
531dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
532{
533   XRectangle xrect;
534   XserverRegion region;
535   struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
536
537   xrect.x = 0;
538   xrect.y = 0;
539   xrect.width = priv->width;
540   xrect.height = priv->height;
541
542   if (psc->f)
543      (*psc->f->flush) (priv->driDrawable);
544
545   region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
546   DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
547   XFixesDestroyRegion(psc->base.dpy, region);
548
549}
550
551static void
552dri2_wait_x(struct glx_context *gc)
553{
554   struct dri2_drawable *priv = (struct dri2_drawable *)
555      GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
556
557   if (priv == NULL || !priv->have_fake_front)
558      return;
559
560   dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
561}
562
563static void
564dri2_wait_gl(struct glx_context *gc)
565{
566   struct dri2_drawable *priv = (struct dri2_drawable *)
567      GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
568
569   if (priv == NULL || !priv->have_fake_front)
570      return;
571
572   dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
573}
574
575/**
576 * Called by the driver when it needs to update the real front buffer with the
577 * contents of its fake front buffer.
578 */
579static void
580dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
581{
582   struct glx_display *priv;
583   struct glx_context *gc;
584   struct dri2_drawable *pdraw = loaderPrivate;
585   struct dri2_screen *psc;
586
587   if (!pdraw)
588      return;
589
590   if (!pdraw->base.psc)
591      return;
592
593   psc = (struct dri2_screen *) pdraw->base.psc;
594
595   priv = __glXInitialize(psc->base.dpy);
596
597   if (priv == NULL)
598       return;
599
600   gc = __glXGetCurrentContext();
601
602   dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
603
604   dri2_wait_gl(gc);
605}
606
607
608static void
609dri2DestroyScreen(struct glx_screen *base)
610{
611   struct dri2_screen *psc = (struct dri2_screen *) base;
612
613   /* Free the direct rendering per screen data */
614   (*psc->core->destroyScreen) (psc->driScreen);
615   driDestroyConfigs(psc->driver_configs);
616   free(psc->driverName);
617   close(psc->fd);
618   free(psc);
619}
620
621/**
622 * Process list of buffer received from the server
623 *
624 * Processes the list of buffers received in a reply from the server to either
625 * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
626 */
627static void
628process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
629                unsigned count)
630{
631   int i;
632
633   pdraw->bufferCount = count;
634   pdraw->have_fake_front = 0;
635   pdraw->have_back = 0;
636
637   /* This assumes the DRI2 buffer attachment tokens matches the
638    * __DRIbuffer tokens. */
639   for (i = 0; i < count; i++) {
640      pdraw->buffers[i].attachment = buffers[i].attachment;
641      pdraw->buffers[i].name = buffers[i].name;
642      pdraw->buffers[i].pitch = buffers[i].pitch;
643      pdraw->buffers[i].cpp = buffers[i].cpp;
644      pdraw->buffers[i].flags = buffers[i].flags;
645      if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
646         pdraw->have_fake_front = 1;
647      if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
648         pdraw->have_back = 1;
649   }
650
651}
652
653unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
654{
655      struct glx_display *glx_dpy = __glXInitialize(dpy);
656      __GLXDRIdrawable *pdraw;
657      pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
658      if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
659         return 0;
660      return glx_dpy->codes.first_event + GLX_BufferSwapComplete;
661}
662
663static void show_fps(struct dri2_drawable *draw)
664{
665   const int interval =
666      ((struct dri2_screen *) draw->base.psc)->show_fps_interval;
667   struct timeval tv;
668   uint64_t current_time;
669
670   gettimeofday(&tv, NULL);
671   current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
672
673   draw->frames++;
674
675   if (draw->previous_time + interval * 1000000 <= current_time) {
676      if (draw->previous_time) {
677         fprintf(stderr, "libGL: FPS = %.2f\n",
678                 ((uint64_t)draw->frames * 1000000) /
679                 (double)(current_time - draw->previous_time));
680      }
681      draw->frames = 0;
682      draw->previous_time = current_time;
683   }
684}
685
686static int64_t
687dri2XcbSwapBuffers(Display *dpy,
688                  __GLXDRIdrawable *pdraw,
689                  int64_t target_msc,
690                  int64_t divisor,
691                  int64_t remainder)
692{
693   xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
694   xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
695   uint32_t target_msc_hi, target_msc_lo;
696   uint32_t divisor_hi, divisor_lo;
697   uint32_t remainder_hi, remainder_lo;
698   int64_t ret = 0;
699   xcb_connection_t *c = XGetXCBConnection(dpy);
700
701   split_counter(target_msc, &target_msc_hi, &target_msc_lo);
702   split_counter(divisor, &divisor_hi, &divisor_lo);
703   split_counter(remainder, &remainder_hi, &remainder_lo);
704
705   swap_buffers_cookie =
706      xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
707                                      target_msc_hi, target_msc_lo,
708                                      divisor_hi, divisor_lo,
709                                      remainder_hi, remainder_lo);
710
711   /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
712    * to do so some time before reusing a (non-pageflipped) backbuffer.
713    * Otherwise, the new rendering could get ahead of the X Server's
714    * dispatch of the swapbuffer and you'd display garbage.
715    *
716    * We use XSync() first to reap the invalidate events through the event
717    * filter, to ensure that the next drawing doesn't use an invalidated
718    * buffer.
719    */
720   XSync(dpy, False);
721
722   swap_buffers_reply =
723      xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
724   if (swap_buffers_reply) {
725      ret = merge_counter(swap_buffers_reply->swap_hi,
726                          swap_buffers_reply->swap_lo);
727      free(swap_buffers_reply);
728   }
729   return ret;
730}
731
732static int64_t
733dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
734		int64_t remainder, Bool flush)
735{
736    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
737    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
738    int64_t ret = 0;
739
740    /* Check we have the right attachments */
741    if (!priv->have_back)
742	return ret;
743
744    __DRIcontext *ctx = dri2GetCurrentContext();
745    unsigned flags = __DRI2_FLUSH_DRAWABLE;
746    if (flush)
747       flags |= __DRI2_FLUSH_CONTEXT;
748    dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
749
750    ret = dri2XcbSwapBuffers(pdraw->psc->dpy, pdraw,
751                             target_msc, divisor, remainder);
752
753    if (psc->show_fps_interval) {
754       show_fps(priv);
755    }
756
757    return ret;
758}
759
760static __DRIbuffer *
761dri2GetBuffers(__DRIdrawable * driDrawable,
762               int *width, int *height,
763               unsigned int *attachments, int count,
764               int *out_count, void *loaderPrivate)
765{
766   struct dri2_drawable *pdraw = loaderPrivate;
767   DRI2Buffer *buffers;
768
769   buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
770                            width, height, attachments, count, out_count);
771   if (buffers == NULL)
772      return NULL;
773
774   pdraw->width = *width;
775   pdraw->height = *height;
776   process_buffers(pdraw, buffers, *out_count);
777
778   free(buffers);
779
780   return pdraw->buffers;
781}
782
783static __DRIbuffer *
784dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
785                         int *width, int *height,
786                         unsigned int *attachments, int count,
787                         int *out_count, void *loaderPrivate)
788{
789   struct dri2_drawable *pdraw = loaderPrivate;
790   DRI2Buffer *buffers;
791
792   buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
793                                      pdraw->base.xDrawable,
794                                      width, height, attachments,
795                                      count, out_count);
796   if (buffers == NULL)
797      return NULL;
798
799   pdraw->width = *width;
800   pdraw->height = *height;
801   process_buffers(pdraw, buffers, *out_count);
802
803   free(buffers);
804
805   return pdraw->buffers;
806}
807
808static int
809dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
810{
811   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
812   struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
813   struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
814
815   if (!dri_valid_swap_interval(psc->driScreen, psc->config, interval))
816      return GLX_BAD_VALUE;
817
818   xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
819   priv->swap_interval = interval;
820
821   return 0;
822}
823
824static int
825dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
826{
827   struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
828
829  return priv->swap_interval;
830}
831
832static void
833driSetBackgroundContext(void *loaderPrivate)
834{
835   struct dri2_context *pcp = (struct dri2_context *) loaderPrivate;
836   __glXSetCurrentContext(&pcp->base);
837}
838
839static GLboolean
840driIsThreadSafe(void *loaderPrivate)
841{
842   struct dri2_context *pcp = (struct dri2_context *) loaderPrivate;
843   /* Check Xlib is running in thread safe mode
844    *
845    * 'lock_fns' is the XLockDisplay function pointer of the X11 display 'dpy'.
846    * It wll be NULL if XInitThreads wasn't called.
847    */
848   return pcp->base.psc->dpy->lock_fns != NULL;
849}
850
851static const __DRIdri2LoaderExtension dri2LoaderExtension = {
852   .base = { __DRI_DRI2_LOADER, 3 },
853
854   .getBuffers              = dri2GetBuffers,
855   .flushFrontBuffer        = dri2FlushFrontBuffer,
856   .getBuffersWithFormat    = dri2GetBuffersWithFormat,
857};
858
859const __DRIuseInvalidateExtension dri2UseInvalidate = {
860   .base = { __DRI_USE_INVALIDATE, 1 }
861};
862
863const __DRIbackgroundCallableExtension driBackgroundCallable = {
864   .base = { __DRI_BACKGROUND_CALLABLE, 2 },
865
866   .setBackgroundContext    = driSetBackgroundContext,
867   .isThreadSafe            = driIsThreadSafe,
868};
869
870_X_HIDDEN void
871dri2InvalidateBuffers(Display *dpy, XID drawable)
872{
873   __GLXDRIdrawable *pdraw =
874      dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
875   struct dri2_screen *psc;
876   struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
877
878   if (!pdraw)
879      return;
880
881   psc = (struct dri2_screen *) pdraw->psc;
882
883   if (psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
884       psc->f->invalidate(pdp->driDrawable);
885}
886
887static void
888dri2_bind_tex_image(__GLXDRIdrawable *base,
889		    int buffer, const int *attrib_list)
890{
891   struct glx_context *gc = __glXGetCurrentContext();
892   struct dri2_context *pcp = (struct dri2_context *) gc;
893   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
894   struct dri2_screen *psc;
895
896   if (pdraw != NULL) {
897      psc = (struct dri2_screen *) base->psc;
898
899      if (psc->texBuffer->base.version >= 2 &&
900	  psc->texBuffer->setTexBuffer2 != NULL) {
901	 (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
902					   pdraw->base.textureTarget,
903					   pdraw->base.textureFormat,
904					   pdraw->driDrawable);
905      }
906      else {
907	 (*psc->texBuffer->setTexBuffer) (pcp->driContext,
908					  pdraw->base.textureTarget,
909					  pdraw->driDrawable);
910      }
911   }
912}
913
914static void
915dri2_release_tex_image(__GLXDRIdrawable *base, int buffer)
916{
917   struct glx_context *gc = __glXGetCurrentContext();
918   struct dri2_context *pcp = (struct dri2_context *) gc;
919   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
920   struct dri2_screen *psc;
921
922   if (pdraw != NULL) {
923      psc = (struct dri2_screen *) base->psc;
924
925      if (psc->texBuffer->base.version >= 3 &&
926          psc->texBuffer->releaseTexBuffer != NULL) {
927         (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
928                                           pdraw->base.textureTarget,
929                                           pdraw->driDrawable);
930      }
931   }
932}
933
934static const struct glx_context_vtable dri2_context_vtable = {
935   .destroy             = dri2_destroy_context,
936   .bind                = dri2_bind_context,
937   .unbind              = dri2_unbind_context,
938   .wait_gl             = dri2_wait_gl,
939   .wait_x              = dri2_wait_x,
940   .interop_query_device_info = dri2_interop_query_device_info,
941   .interop_export_object = dri2_interop_export_object
942};
943
944static void
945dri2BindExtensions(struct dri2_screen *psc, struct glx_display * priv,
946                   const char *driverName)
947{
948   const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
949   const __DRIextension **extensions;
950   int i;
951
952   extensions = psc->core->getExtensions(psc->driScreen);
953
954   __glXEnableDirectExtension(&psc->base, "GLX_EXT_swap_control");
955   __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
956   __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
957   __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
958
959   /*
960    * GLX_INTEL_swap_event is broken on the server side, where it's
961    * currently unconditionally enabled. This completely breaks
962    * systems running on drivers which don't support that extension.
963    * There's no way to test for its presence on this side, so instead
964    * of disabling it unconditionally, just disable it for drivers
965    * which are known to not support it.
966    *
967    * This was fixed in xserver 1.15.0 (190b03215), so now we only
968    * disable the broken driver.
969    */
970   if (strcmp(driverName, "vmwgfx") != 0) {
971      __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
972   }
973
974   __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
975   __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
976   __glXEnableDirectExtension(&psc->base, "GLX_EXT_no_config_context");
977
978   if ((mask & ((1 << __DRI_API_GLES) |
979                (1 << __DRI_API_GLES2) |
980                (1 << __DRI_API_GLES3))) != 0) {
981      __glXEnableDirectExtension(&psc->base,
982                                 "GLX_EXT_create_context_es_profile");
983      __glXEnableDirectExtension(&psc->base,
984                                 "GLX_EXT_create_context_es2_profile");
985   }
986
987   for (i = 0; extensions[i]; i++) {
988      if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
989	 psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
990	 __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
991      }
992
993      if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
994	 psc->f = (__DRI2flushExtension *) extensions[i];
995	 /* internal driver extension, no GL extension exposed */
996      }
997
998      if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
999	 psc->config = (__DRI2configQueryExtension *) extensions[i];
1000
1001      if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1002	 psc->throttle = (__DRI2throttleExtension *) extensions[i];
1003
1004      if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1005         __glXEnableDirectExtension(&psc->base,
1006                                    "GLX_ARB_create_context_robustness");
1007
1008      if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
1009         psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
1010         __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
1011         unsigned int no_error = 0;
1012         if (psc->rendererQuery->queryInteger(psc->driScreen,
1013                                              __DRI2_RENDERER_HAS_NO_ERROR_CONTEXT,
1014                                              &no_error) == 0 && no_error)
1015             __glXEnableDirectExtension(&psc->base,
1016                                        "GLX_ARB_create_context_no_error");
1017      }
1018
1019      if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
1020	 psc->interop = (__DRI2interopExtension*)extensions[i];
1021
1022      if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0)
1023         __glXEnableDirectExtension(&psc->base,
1024                                    "GLX_ARB_context_flush_control");
1025   }
1026}
1027
1028static char *
1029dri2_get_driver_name(struct glx_screen *glx_screen)
1030{
1031    struct dri2_screen *psc = (struct dri2_screen *)glx_screen;
1032
1033    return psc->driverName;
1034}
1035
1036static const struct glx_screen_vtable dri2_screen_vtable = {
1037   .create_context         = dri_common_create_context,
1038   .create_context_attribs = dri2_create_context_attribs,
1039   .query_renderer_integer = dri2_query_renderer_integer,
1040   .query_renderer_string  = dri2_query_renderer_string,
1041   .get_driver_name        = dri2_get_driver_name,
1042};
1043
1044static struct glx_screen *
1045dri2CreateScreen(int screen, struct glx_display * priv)
1046{
1047   const __DRIconfig **driver_configs;
1048   const __DRIextension **extensions;
1049   const struct dri2_display *const pdp = (struct dri2_display *)
1050      priv->dri2Display;
1051   struct dri2_screen *psc;
1052   __GLXDRIscreen *psp;
1053   struct glx_config *configs = NULL, *visuals = NULL;
1054   char *driverName = NULL, *loader_driverName, *deviceName, *tmp;
1055   drm_magic_t magic;
1056   int i;
1057
1058   psc = calloc(1, sizeof *psc);
1059   if (psc == NULL)
1060      return NULL;
1061
1062   psc->fd = -1;
1063
1064   if (!glx_screen_init(&psc->base, screen, priv)) {
1065      free(psc);
1066      return NULL;
1067   }
1068
1069   if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1070		    &driverName, &deviceName)) {
1071      glx_screen_cleanup(&psc->base);
1072      free(psc);
1073      InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1074      return NULL;
1075   }
1076
1077   psc->fd = loader_open_device(deviceName);
1078   if (psc->fd < 0) {
1079      ErrorMessageF("failed to open %s: %s\n", deviceName, strerror(errno));
1080      goto handle_error;
1081   }
1082
1083   if (drmGetMagic(psc->fd, &magic)) {
1084      ErrorMessageF("failed to get magic\n");
1085      goto handle_error;
1086   }
1087
1088   if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1089      ErrorMessageF("failed to authenticate magic %d\n", magic);
1090      goto handle_error;
1091   }
1092
1093   /* If Mesa knows about the appropriate driver for this fd, then trust it.
1094    * Otherwise, default to the server's value.
1095    */
1096   loader_driverName = loader_get_driver_for_fd(psc->fd);
1097   if (loader_driverName) {
1098      free(driverName);
1099      driverName = loader_driverName;
1100   }
1101   psc->driverName = driverName;
1102
1103   extensions = driOpenDriver(driverName, &psc->driver);
1104   if (extensions == NULL)
1105      goto handle_error;
1106
1107   for (i = 0; extensions[i]; i++) {
1108      if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1109	 psc->core = (__DRIcoreExtension *) extensions[i];
1110      if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1111	 psc->dri2 = (__DRIdri2Extension *) extensions[i];
1112   }
1113
1114   if (psc->core == NULL || psc->dri2 == NULL || psc->dri2->base.version < 3) {
1115      ErrorMessageF("core dri or dri2 extension not found\n");
1116      goto handle_error;
1117   }
1118
1119   if (psc->dri2->base.version >= 4) {
1120      psc->driScreen =
1121         psc->dri2->createNewScreen2(screen, psc->fd,
1122                                     (const __DRIextension **)
1123                                     &pdp->loader_extensions[0],
1124                                     extensions,
1125                                     &driver_configs, psc);
1126   } else {
1127      psc->driScreen =
1128         psc->dri2->createNewScreen(screen, psc->fd,
1129                                    (const __DRIextension **)
1130                                    &pdp->loader_extensions[0],
1131                                    &driver_configs, psc);
1132   }
1133
1134   if (psc->driScreen == NULL) {
1135      ErrorMessageF("glx: failed to create dri2 screen\n");
1136      goto handle_error;
1137   }
1138
1139   dri2BindExtensions(psc, priv, driverName);
1140
1141   configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1142   visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1143
1144   if (!configs || !visuals) {
1145       ErrorMessageF("No matching fbConfigs or visuals found\n");
1146       goto handle_error;
1147   }
1148
1149   glx_config_destroy_list(psc->base.configs);
1150   psc->base.configs = configs;
1151   glx_config_destroy_list(psc->base.visuals);
1152   psc->base.visuals = visuals;
1153
1154   psc->driver_configs = driver_configs;
1155
1156   psc->base.vtable = &dri2_screen_vtable;
1157   psc->base.context_vtable = &dri2_context_vtable;
1158   psp = &psc->vtable;
1159   psc->base.driScreen = psp;
1160   psp->destroyScreen = dri2DestroyScreen;
1161   psp->createDrawable = dri2CreateDrawable;
1162   psp->swapBuffers = dri2SwapBuffers;
1163   psp->getDrawableMSC = NULL;
1164   psp->waitForMSC = NULL;
1165   psp->waitForSBC = NULL;
1166   psp->setSwapInterval = NULL;
1167   psp->getSwapInterval = NULL;
1168   psp->getBufferAge = NULL;
1169   psp->bindTexImage = dri2_bind_tex_image;
1170   psp->releaseTexImage = dri2_release_tex_image;
1171
1172   psp->getDrawableMSC = dri2DrawableGetMSC;
1173   psp->waitForMSC = dri2WaitForMSC;
1174   psp->waitForSBC = dri2WaitForSBC;
1175   psp->setSwapInterval = dri2SetSwapInterval;
1176   psp->getSwapInterval = dri2GetSwapInterval;
1177   psp->maxSwapInterval = INT_MAX;
1178
1179   __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1180   __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
1181
1182   if (psc->config->base.version > 1 &&
1183          psc->config->configQuerys(psc->driScreen, "glx_extension_override",
1184                                    &tmp) == 0)
1185      __glXParseExtensionOverride(&psc->base, tmp);
1186
1187   if (psc->config->base.version > 1 &&
1188          psc->config->configQuerys(psc->driScreen,
1189                                    "indirect_gl_extension_override",
1190                                    &tmp) == 0)
1191      __IndirectGlParseExtensionOverride(&psc->base, tmp);
1192
1193   if (psc->config->base.version > 1) {
1194      uint8_t force = false;
1195      if (psc->config->configQueryb(psc->driScreen, "force_direct_glx_context",
1196                                    &force) == 0) {
1197         psc->base.force_direct_context = force;
1198      }
1199
1200      uint8_t invalid_glx_destroy_window = false;
1201      if (psc->config->configQueryb(psc->driScreen,
1202                                    "allow_invalid_glx_destroy_window",
1203                                    &invalid_glx_destroy_window) == 0) {
1204         psc->base.allow_invalid_glx_destroy_window = invalid_glx_destroy_window;
1205      }
1206   }
1207
1208   /* DRI2 supports SubBuffer through DRI2CopyRegion, so it's always
1209    * available.*/
1210   psp->copySubBuffer = dri2CopySubBuffer;
1211   __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1212
1213   free(deviceName);
1214
1215   tmp = getenv("LIBGL_SHOW_FPS");
1216   psc->show_fps_interval = (tmp) ? atoi(tmp) : 0;
1217   if (psc->show_fps_interval < 0)
1218      psc->show_fps_interval = 0;
1219
1220   InfoMessageF("Using DRI2 for screen %d\n", screen);
1221
1222   return &psc->base;
1223
1224handle_error:
1225   CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1226
1227   if (configs)
1228       glx_config_destroy_list(configs);
1229   if (visuals)
1230       glx_config_destroy_list(visuals);
1231   if (psc->driScreen)
1232       psc->core->destroyScreen(psc->driScreen);
1233   psc->driScreen = NULL;
1234   if (psc->fd >= 0)
1235      close(psc->fd);
1236   if (psc->driver)
1237      dlclose(psc->driver);
1238
1239   free(deviceName);
1240   glx_screen_cleanup(&psc->base);
1241   free(psc);
1242
1243   return NULL;
1244}
1245
1246/* Called from __glXFreeDisplayPrivate.
1247 */
1248static void
1249dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1250{
1251   struct dri2_display *pdp = (struct dri2_display *) dpy;
1252
1253   __glxHashDestroy(pdp->dri2Hash);
1254   free(dpy);
1255}
1256
1257_X_HIDDEN __GLXDRIdrawable *
1258dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1259{
1260   struct glx_display *d = __glXInitialize(dpy);
1261   struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1262   __GLXDRIdrawable *pdraw;
1263
1264   if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1265      return pdraw;
1266
1267   return NULL;
1268}
1269
1270/*
1271 * Allocate, initialize and return a __DRIdisplayPrivate object.
1272 * This is called from __glXInitialize() when we are given a new
1273 * display pointer.
1274 */
1275_X_HIDDEN __GLXDRIdisplay *
1276dri2CreateDisplay(Display * dpy)
1277{
1278   struct dri2_display *pdp;
1279   int eventBase, errorBase, i;
1280   int driMajor, driMinor;
1281
1282   if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1283      return NULL;
1284
1285   pdp = malloc(sizeof *pdp);
1286   if (pdp == NULL)
1287      return NULL;
1288
1289   if (!DRI2QueryVersion(dpy, &driMajor, &driMinor) ||
1290       driMinor < 3) {
1291      free(pdp);
1292      return NULL;
1293   }
1294
1295   pdp->base.destroyDisplay = dri2DestroyDisplay;
1296   pdp->base.createScreen = dri2CreateScreen;
1297
1298   i = 0;
1299   pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1300   pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1301   pdp->loader_extensions[i++] = &driBackgroundCallable.base;
1302   pdp->loader_extensions[i++] = NULL;
1303
1304   pdp->dri2Hash = __glxHashCreate();
1305   if (pdp->dri2Hash == NULL) {
1306      free(pdp);
1307      return NULL;
1308   }
1309
1310   return &pdp->base;
1311}
1312
1313#endif /* GLX_DIRECT_RENDERING */
1314