dri2_glx.c revision b8e80941 
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
53/* From xmlpool/options.h, user exposed so should be stable */
54#define DRI_CONF_VBLANK_NEVER 0
55#define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
56#define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
57#define DRI_CONF_VBLANK_ALWAYS_SYNC 3
58
59#undef DRI2_MINOR
60#define DRI2_MINOR 1
61
62struct dri2_display
63{
64   __GLXDRIdisplay base;
65
66   /*
67    ** XFree86-DRI version information
68    */
69   int driMajor;
70   int driMinor;
71   int driPatch;
72   int swapAvailable;
73   int invalidateAvailable;
74
75   __glxHashTable *dri2Hash;
76
77   const __DRIextension *loader_extensions[5];
78};
79
80struct dri2_drawable
81{
82   __GLXDRIdrawable base;
83   __DRIdrawable *driDrawable;
84   __DRIbuffer buffers[5];
85   int bufferCount;
86   int width, height;
87   int have_back;
88   int have_fake_front;
89   int swap_interval;
90
91   uint64_t previous_time;
92   unsigned frames;
93};
94
95static const struct glx_context_vtable dri2_context_vtable;
96
97/* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
98 * low halves separately.  This helps you split them.
99 */
100static void
101split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
102{
103   *hi = (counter >> 32);
104   *lo = counter & 0xffffffff;
105}
106
107static uint64_t
108merge_counter(uint32_t hi, uint32_t lo)
109{
110   return ((uint64_t)hi << 32) | lo;
111}
112
113static void
114dri2_destroy_context(struct glx_context *context)
115{
116   struct dri2_context *pcp = (struct dri2_context *) context;
117   struct dri2_screen *psc = (struct dri2_screen *) context->psc;
118
119   driReleaseDrawables(&pcp->base);
120
121   free((char *) context->extensions);
122
123   (*psc->core->destroyContext) (pcp->driContext);
124
125   free(pcp);
126}
127
128static Bool
129dri2_bind_context(struct glx_context *context, struct glx_context *old,
130		  GLXDrawable draw, GLXDrawable read)
131{
132   struct dri2_context *pcp = (struct dri2_context *) context;
133   struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
134   struct dri2_drawable *pdraw, *pread;
135   __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
136   struct glx_display *dpyPriv = psc->base.display;
137   struct dri2_display *pdp;
138
139   pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
140   pread = (struct dri2_drawable *) driFetchDrawable(context, read);
141
142   driReleaseDrawables(&pcp->base);
143
144   if (pdraw)
145      dri_draw = pdraw->driDrawable;
146   else if (draw != None)
147      return GLXBadDrawable;
148
149   if (pread)
150      dri_read = pread->driDrawable;
151   else if (read != None)
152      return GLXBadDrawable;
153
154   if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
155      return GLXBadContext;
156
157   /* If the server doesn't send invalidate events, we may miss a
158    * resize before the rendering starts.  Invalidate the buffers now
159    * so the driver will recheck before rendering starts. */
160   pdp = (struct dri2_display *) dpyPriv->dri2Display;
161   if (!pdp->invalidateAvailable && pdraw) {
162      dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
163      if (pread != pdraw && pread)
164	 dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
165   }
166
167   return Success;
168}
169
170static void
171dri2_unbind_context(struct glx_context *context, struct glx_context *new)
172{
173   struct dri2_context *pcp = (struct dri2_context *) context;
174   struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
175
176   (*psc->core->unbindContext) (pcp->driContext);
177}
178
179static struct glx_context *
180dri2_create_context(struct glx_screen *base,
181		    struct glx_config *config_base,
182		    struct glx_context *shareList, int renderType)
183{
184   struct dri2_context *pcp, *pcp_shared;
185   struct dri2_screen *psc = (struct dri2_screen *) base;
186   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
187   __DRIcontext *shared = NULL;
188
189   /* Check the renderType value */
190   if (!validate_renderType_against_config(config_base, renderType))
191       return NULL;
192
193   if (shareList) {
194      /* If the shareList context is not a DRI2 context, we cannot possibly
195       * create a DRI2 context that shares it.
196       */
197      if (shareList->vtable->destroy != dri2_destroy_context) {
198	 return NULL;
199      }
200
201      pcp_shared = (struct dri2_context *) shareList;
202      shared = pcp_shared->driContext;
203   }
204
205   pcp = calloc(1, sizeof *pcp);
206   if (pcp == NULL)
207      return NULL;
208
209   if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
210      free(pcp);
211      return NULL;
212   }
213
214   pcp->base.renderType = renderType;
215
216   pcp->driContext =
217      (*psc->dri2->createNewContext) (psc->driScreen,
218                                      config->driConfig, shared, pcp);
219
220   if (pcp->driContext == NULL) {
221      free(pcp);
222      return NULL;
223   }
224
225   pcp->base.vtable = &dri2_context_vtable;
226
227   return &pcp->base;
228}
229
230static struct glx_context *
231dri2_create_context_attribs(struct glx_screen *base,
232			    struct glx_config *config_base,
233			    struct glx_context *shareList,
234			    unsigned num_attribs,
235			    const uint32_t *attribs,
236			    unsigned *error)
237{
238   struct dri2_context *pcp = NULL;
239   struct dri2_context *pcp_shared = NULL;
240   struct dri2_screen *psc = (struct dri2_screen *) base;
241   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
242   __DRIcontext *shared = NULL;
243
244   uint32_t minor_ver;
245   uint32_t major_ver;
246   uint32_t renderType;
247   uint32_t flags;
248   unsigned api;
249   int reset;
250   int release;
251   uint32_t ctx_attribs[2 * 6];
252   unsigned num_ctx_attribs = 0;
253
254   if (psc->dri2->base.version < 3) {
255      *error = __DRI_CTX_ERROR_NO_MEMORY;
256      goto error_exit;
257   }
258
259   /* Remap the GLX tokens to DRI2 tokens.
260    */
261   if (!dri2_convert_glx_attribs(num_attribs, attribs,
262                                 &major_ver, &minor_ver, &renderType, &flags,
263                                 &api, &reset, &release, error))
264      goto error_exit;
265
266   if (!dri2_check_no_error(flags, shareList, major_ver, error)) {
267      goto error_exit;
268   }
269
270   /* Check the renderType value */
271   if (!validate_renderType_against_config(config_base, renderType))
272       goto error_exit;
273
274   if (shareList) {
275      pcp_shared = (struct dri2_context *) shareList;
276      shared = pcp_shared->driContext;
277   }
278
279   pcp = calloc(1, sizeof *pcp);
280   if (pcp == NULL) {
281      *error = __DRI_CTX_ERROR_NO_MEMORY;
282      goto error_exit;
283   }
284
285   if (!glx_context_init(&pcp->base, &psc->base, config_base))
286      goto error_exit;
287
288   ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
289   ctx_attribs[num_ctx_attribs++] = major_ver;
290   ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
291   ctx_attribs[num_ctx_attribs++] = minor_ver;
292
293   /* Only send a value when the non-default value is requested.  By doing
294    * this we don't have to check the driver's DRI2 version before sending the
295    * default value.
296    */
297   if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
298      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
299      ctx_attribs[num_ctx_attribs++] = reset;
300   }
301
302   if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
303      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
304      ctx_attribs[num_ctx_attribs++] = release;
305   }
306
307   if (flags != 0) {
308      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
309
310      /* The current __DRI_CTX_FLAG_* values are identical to the
311       * GLX_CONTEXT_*_BIT values.
312       */
313      ctx_attribs[num_ctx_attribs++] = flags;
314   }
315
316   /* The renderType is retrieved from attribs, or set to default
317    *  of GLX_RGBA_TYPE.
318    */
319   pcp->base.renderType = renderType;
320
321   if (flags & __DRI_CTX_FLAG_NO_ERROR)
322      pcp->base.noError = GL_TRUE;
323
324   pcp->driContext =
325      (*psc->dri2->createContextAttribs) (psc->driScreen,
326					  api,
327					  config ? config->driConfig : NULL,
328					  shared,
329					  num_ctx_attribs / 2,
330					  ctx_attribs,
331					  error,
332					  pcp);
333
334   if (pcp->driContext == NULL)
335      goto error_exit;
336
337   pcp->base.vtable = &dri2_context_vtable;
338
339   return &pcp->base;
340
341error_exit:
342   free(pcp);
343
344   return NULL;
345}
346
347static void
348dri2DestroyDrawable(__GLXDRIdrawable *base)
349{
350   struct dri2_screen *psc = (struct dri2_screen *) base->psc;
351   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
352   struct glx_display *dpyPriv = psc->base.display;
353   struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
354
355   __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
356   (*psc->core->destroyDrawable) (pdraw->driDrawable);
357
358   /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
359    * now, as the application explicitly asked to destroy the GLX
360    * drawable.  Otherwise, for legacy drawables, we let the DRI2
361    * drawable linger on the server, since there's no good way of
362    * knowing when the application is done with it.  The server will
363    * destroy the DRI2 drawable when it destroys the X drawable or the
364    * client exits anyway. */
365   if (pdraw->base.xDrawable != pdraw->base.drawable)
366      DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
367
368   free(pdraw);
369}
370
371static __GLXDRIdrawable *
372dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
373		   GLXDrawable drawable, struct glx_config *config_base)
374{
375   struct dri2_drawable *pdraw;
376   struct dri2_screen *psc = (struct dri2_screen *) base;
377   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
378   struct glx_display *dpyPriv;
379   struct dri2_display *pdp;
380   GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
381
382   dpyPriv = __glXInitialize(psc->base.dpy);
383   if (dpyPriv == NULL)
384      return NULL;
385
386   pdraw = calloc(1, sizeof(*pdraw));
387   if (!pdraw)
388      return NULL;
389
390   pdraw->base.destroyDrawable = dri2DestroyDrawable;
391   pdraw->base.xDrawable = xDrawable;
392   pdraw->base.drawable = drawable;
393   pdraw->base.psc = &psc->base;
394   pdraw->bufferCount = 0;
395   pdraw->swap_interval = 1; /* default may be overridden below */
396   pdraw->have_back = 0;
397
398   if (psc->config)
399      psc->config->configQueryi(psc->driScreen,
400				"vblank_mode", &vblank_mode);
401
402   switch (vblank_mode) {
403   case DRI_CONF_VBLANK_NEVER:
404   case DRI_CONF_VBLANK_DEF_INTERVAL_0:
405      pdraw->swap_interval = 0;
406      break;
407   case DRI_CONF_VBLANK_DEF_INTERVAL_1:
408   case DRI_CONF_VBLANK_ALWAYS_SYNC:
409   default:
410      pdraw->swap_interval = 1;
411      break;
412   }
413
414   DRI2CreateDrawable(psc->base.dpy, xDrawable);
415   pdp = (struct dri2_display *)dpyPriv->dri2Display;
416   /* Create a new drawable */
417   pdraw->driDrawable =
418      (*psc->dri2->createNewDrawable) (psc->driScreen,
419                                       config->driConfig, pdraw);
420
421   if (!pdraw->driDrawable) {
422      DRI2DestroyDrawable(psc->base.dpy, xDrawable);
423      free(pdraw);
424      return NULL;
425   }
426
427   if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
428      (*psc->core->destroyDrawable) (pdraw->driDrawable);
429      DRI2DestroyDrawable(psc->base.dpy, xDrawable);
430      free(pdraw);
431      return None;
432   }
433
434   /*
435    * Make sure server has the same swap interval we do for the new
436    * drawable.
437    */
438   if (psc->vtable.setSwapInterval)
439      psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval);
440
441   return &pdraw->base;
442}
443
444static int
445dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
446		   int64_t *ust, int64_t *msc, int64_t *sbc)
447{
448   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
449   xcb_dri2_get_msc_cookie_t get_msc_cookie;
450   xcb_dri2_get_msc_reply_t *get_msc_reply;
451
452   get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
453   get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
454
455   if (!get_msc_reply)
456      return 0;
457
458   *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
459   *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
460   *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
461   free(get_msc_reply);
462
463   return 1;
464}
465
466static int
467dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
468	       int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
469{
470   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
471   xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
472   xcb_dri2_wait_msc_reply_t *wait_msc_reply;
473   uint32_t target_msc_hi, target_msc_lo;
474   uint32_t divisor_hi, divisor_lo;
475   uint32_t remainder_hi, remainder_lo;
476
477   split_counter(target_msc, &target_msc_hi, &target_msc_lo);
478   split_counter(divisor, &divisor_hi, &divisor_lo);
479   split_counter(remainder, &remainder_hi, &remainder_lo);
480
481   wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
482                                                 target_msc_hi, target_msc_lo,
483                                                 divisor_hi, divisor_lo,
484                                                 remainder_hi, remainder_lo);
485   wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
486
487   if (!wait_msc_reply)
488      return 0;
489
490   *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
491   *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
492   *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
493   free(wait_msc_reply);
494
495   return 1;
496}
497
498static int
499dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
500	       int64_t *msc, int64_t *sbc)
501{
502   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
503   xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
504   xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
505   uint32_t target_sbc_hi, target_sbc_lo;
506
507   split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
508
509   wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
510                                                 target_sbc_hi, target_sbc_lo);
511   wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
512
513   if (!wait_sbc_reply)
514      return 0;
515
516   *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
517   *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
518   *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
519   free(wait_sbc_reply);
520
521   return 1;
522}
523
524static __DRIcontext *
525dri2GetCurrentContext()
526{
527   struct glx_context *gc = __glXGetCurrentContext();
528   struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
529
530   return (gc != &dummyContext) ? dri2Ctx->driContext : NULL;
531}
532
533/**
534 * dri2Throttle - Request driver throttling
535 *
536 * This function uses the DRI2 throttle extension to give the
537 * driver the opportunity to throttle on flush front, copysubbuffer
538 * and swapbuffers.
539 */
540static void
541dri2Throttle(struct dri2_screen *psc,
542	     struct dri2_drawable *draw,
543	     enum __DRI2throttleReason reason)
544{
545   if (psc->throttle) {
546      __DRIcontext *ctx = dri2GetCurrentContext();
547
548      psc->throttle->throttle(ctx, draw->driDrawable, reason);
549   }
550}
551
552/**
553 * Asks the driver to flush any queued work necessary for serializing with the
554 * X command stream, and optionally the slightly more strict requirement of
555 * glFlush() equivalence (which would require flushing even if nothing had
556 * been drawn to a window system framebuffer, for example).
557 */
558static void
559dri2Flush(struct dri2_screen *psc,
560          __DRIcontext *ctx,
561          struct dri2_drawable *draw,
562          unsigned flags,
563          enum __DRI2throttleReason throttle_reason)
564{
565   if (ctx && psc->f && psc->f->base.version >= 4) {
566      psc->f->flush_with_flags(ctx, draw->driDrawable, flags, throttle_reason);
567   } else {
568      if (flags & __DRI2_FLUSH_CONTEXT)
569         glFlush();
570
571      if (psc->f)
572         psc->f->flush(draw->driDrawable);
573
574      dri2Throttle(psc, draw, throttle_reason);
575   }
576}
577
578static void
579__dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
580		    int width, int height,
581		    enum __DRI2throttleReason reason, Bool flush)
582{
583   struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
584   struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
585   XRectangle xrect;
586   XserverRegion region;
587   __DRIcontext *ctx = dri2GetCurrentContext();
588   unsigned flags;
589
590   /* Check we have the right attachments */
591   if (!priv->have_back)
592      return;
593
594   xrect.x = x;
595   xrect.y = priv->height - y - height;
596   xrect.width = width;
597   xrect.height = height;
598
599   flags = __DRI2_FLUSH_DRAWABLE;
600   if (flush)
601      flags |= __DRI2_FLUSH_CONTEXT;
602   dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
603
604   region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
605   DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
606                  DRI2BufferFrontLeft, DRI2BufferBackLeft);
607
608   /* Refresh the fake front (if present) after we just damaged the real
609    * front.
610    */
611   if (priv->have_fake_front)
612      DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
613		     DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
614
615   XFixesDestroyRegion(psc->base.dpy, region);
616}
617
618static void
619dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
620		  int width, int height, Bool flush)
621{
622   __dri2CopySubBuffer(pdraw, x, y, width, height,
623		       __DRI2_THROTTLE_COPYSUBBUFFER, flush);
624}
625
626
627static void
628dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
629{
630   XRectangle xrect;
631   XserverRegion region;
632   struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
633
634   xrect.x = 0;
635   xrect.y = 0;
636   xrect.width = priv->width;
637   xrect.height = priv->height;
638
639   if (psc->f)
640      (*psc->f->flush) (priv->driDrawable);
641
642   region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
643   DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
644   XFixesDestroyRegion(psc->base.dpy, region);
645
646}
647
648static void
649dri2_wait_x(struct glx_context *gc)
650{
651   struct dri2_drawable *priv = (struct dri2_drawable *)
652      GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
653
654   if (priv == NULL || !priv->have_fake_front)
655      return;
656
657   dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
658}
659
660static void
661dri2_wait_gl(struct glx_context *gc)
662{
663   struct dri2_drawable *priv = (struct dri2_drawable *)
664      GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
665
666   if (priv == NULL || !priv->have_fake_front)
667      return;
668
669   dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
670}
671
672/**
673 * Called by the driver when it needs to update the real front buffer with the
674 * contents of its fake front buffer.
675 */
676static void
677dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
678{
679   struct glx_display *priv;
680   struct dri2_display *pdp;
681   struct glx_context *gc;
682   struct dri2_drawable *pdraw = loaderPrivate;
683   struct dri2_screen *psc;
684
685   if (!pdraw)
686      return;
687
688   if (!pdraw->base.psc)
689      return;
690
691   psc = (struct dri2_screen *) pdraw->base.psc;
692
693   priv = __glXInitialize(psc->base.dpy);
694
695   if (priv == NULL)
696       return;
697
698   pdp = (struct dri2_display *) priv->dri2Display;
699   gc = __glXGetCurrentContext();
700
701   dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
702
703   /* Old servers don't send invalidate events */
704   if (!pdp->invalidateAvailable)
705       dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
706
707   dri2_wait_gl(gc);
708}
709
710
711static void
712dri2DestroyScreen(struct glx_screen *base)
713{
714   struct dri2_screen *psc = (struct dri2_screen *) base;
715
716   /* Free the direct rendering per screen data */
717   (*psc->core->destroyScreen) (psc->driScreen);
718   driDestroyConfigs(psc->driver_configs);
719   close(psc->fd);
720   free(psc);
721}
722
723/**
724 * Process list of buffer received from the server
725 *
726 * Processes the list of buffers received in a reply from the server to either
727 * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
728 */
729static void
730process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
731                unsigned count)
732{
733   int i;
734
735   pdraw->bufferCount = count;
736   pdraw->have_fake_front = 0;
737   pdraw->have_back = 0;
738
739   /* This assumes the DRI2 buffer attachment tokens matches the
740    * __DRIbuffer tokens. */
741   for (i = 0; i < count; i++) {
742      pdraw->buffers[i].attachment = buffers[i].attachment;
743      pdraw->buffers[i].name = buffers[i].name;
744      pdraw->buffers[i].pitch = buffers[i].pitch;
745      pdraw->buffers[i].cpp = buffers[i].cpp;
746      pdraw->buffers[i].flags = buffers[i].flags;
747      if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
748         pdraw->have_fake_front = 1;
749      if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
750         pdraw->have_back = 1;
751   }
752
753}
754
755unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
756{
757      struct glx_display *glx_dpy = __glXInitialize(dpy);
758      __GLXDRIdrawable *pdraw;
759      pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
760      if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
761         return 0;
762      return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
763}
764
765static void show_fps(struct dri2_drawable *draw)
766{
767   const int interval =
768      ((struct dri2_screen *) draw->base.psc)->show_fps_interval;
769   struct timeval tv;
770   uint64_t current_time;
771
772   gettimeofday(&tv, 0);
773   current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
774
775   draw->frames++;
776
777   if (draw->previous_time + interval * 1000000 <= current_time) {
778      if (draw->previous_time) {
779         fprintf(stderr, "libGL: FPS = %.1f\n",
780                 ((uint64_t)draw->frames * 1000000) /
781                 (double)(current_time - draw->previous_time));
782      }
783      draw->frames = 0;
784      draw->previous_time = current_time;
785   }
786}
787
788static int64_t
789dri2XcbSwapBuffers(Display *dpy,
790                  __GLXDRIdrawable *pdraw,
791                  int64_t target_msc,
792                  int64_t divisor,
793                  int64_t remainder)
794{
795   xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
796   xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
797   uint32_t target_msc_hi, target_msc_lo;
798   uint32_t divisor_hi, divisor_lo;
799   uint32_t remainder_hi, remainder_lo;
800   int64_t ret = 0;
801   xcb_connection_t *c = XGetXCBConnection(dpy);
802
803   split_counter(target_msc, &target_msc_hi, &target_msc_lo);
804   split_counter(divisor, &divisor_hi, &divisor_lo);
805   split_counter(remainder, &remainder_hi, &remainder_lo);
806
807   swap_buffers_cookie =
808      xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
809                                      target_msc_hi, target_msc_lo,
810                                      divisor_hi, divisor_lo,
811                                      remainder_hi, remainder_lo);
812
813   /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
814    * to do so some time before reusing a (non-pageflipped) backbuffer.
815    * Otherwise, the new rendering could get ahead of the X Server's
816    * dispatch of the swapbuffer and you'd display garbage.
817    *
818    * We use XSync() first to reap the invalidate events through the event
819    * filter, to ensure that the next drawing doesn't use an invalidated
820    * buffer.
821    */
822   XSync(dpy, False);
823
824   swap_buffers_reply =
825      xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
826   if (swap_buffers_reply) {
827      ret = merge_counter(swap_buffers_reply->swap_hi,
828                          swap_buffers_reply->swap_lo);
829      free(swap_buffers_reply);
830   }
831   return ret;
832}
833
834static int64_t
835dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
836		int64_t remainder, Bool flush)
837{
838    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
839    struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
840    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
841    struct dri2_display *pdp =
842	(struct dri2_display *)dpyPriv->dri2Display;
843    int64_t ret = 0;
844
845    /* Check we have the right attachments */
846    if (!priv->have_back)
847	return ret;
848
849    /* Old servers can't handle swapbuffers */
850    if (!pdp->swapAvailable) {
851       __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
852			   __DRI2_THROTTLE_SWAPBUFFER, flush);
853    } else {
854       __DRIcontext *ctx = dri2GetCurrentContext();
855       unsigned flags = __DRI2_FLUSH_DRAWABLE;
856       if (flush)
857          flags |= __DRI2_FLUSH_CONTEXT;
858       dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
859
860       ret = dri2XcbSwapBuffers(pdraw->psc->dpy, pdraw,
861                                target_msc, divisor, remainder);
862    }
863
864    if (psc->show_fps_interval) {
865       show_fps(priv);
866    }
867
868    /* Old servers don't send invalidate events */
869    if (!pdp->invalidateAvailable)
870       dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
871
872    return ret;
873}
874
875static __DRIbuffer *
876dri2GetBuffers(__DRIdrawable * driDrawable,
877               int *width, int *height,
878               unsigned int *attachments, int count,
879               int *out_count, void *loaderPrivate)
880{
881   struct dri2_drawable *pdraw = loaderPrivate;
882   DRI2Buffer *buffers;
883
884   buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
885                            width, height, attachments, count, out_count);
886   if (buffers == NULL)
887      return NULL;
888
889   pdraw->width = *width;
890   pdraw->height = *height;
891   process_buffers(pdraw, buffers, *out_count);
892
893   free(buffers);
894
895   return pdraw->buffers;
896}
897
898static __DRIbuffer *
899dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
900                         int *width, int *height,
901                         unsigned int *attachments, int count,
902                         int *out_count, void *loaderPrivate)
903{
904   struct dri2_drawable *pdraw = loaderPrivate;
905   DRI2Buffer *buffers;
906
907   buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
908                                      pdraw->base.xDrawable,
909                                      width, height, attachments,
910                                      count, out_count);
911   if (buffers == NULL)
912      return NULL;
913
914   pdraw->width = *width;
915   pdraw->height = *height;
916   process_buffers(pdraw, buffers, *out_count);
917
918   free(buffers);
919
920   return pdraw->buffers;
921}
922
923static int
924dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
925{
926   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
927   struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
928   GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
929   struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
930
931   if (psc->config)
932      psc->config->configQueryi(psc->driScreen,
933				"vblank_mode", &vblank_mode);
934
935   switch (vblank_mode) {
936   case DRI_CONF_VBLANK_NEVER:
937      if (interval != 0)
938         return GLX_BAD_VALUE;
939      break;
940   case DRI_CONF_VBLANK_ALWAYS_SYNC:
941      if (interval <= 0)
942	 return GLX_BAD_VALUE;
943      break;
944   default:
945      break;
946   }
947
948   xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
949   priv->swap_interval = interval;
950
951   return 0;
952}
953
954static int
955dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
956{
957   struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
958
959  return priv->swap_interval;
960}
961
962static void
963driSetBackgroundContext(void *loaderPrivate)
964{
965   struct dri2_context *pcp = (struct dri2_context *) loaderPrivate;
966   __glXSetCurrentContext(&pcp->base);
967}
968
969static GLboolean
970driIsThreadSafe(void *loaderPrivate)
971{
972   struct dri2_context *pcp = (struct dri2_context *) loaderPrivate;
973   /* Check Xlib is running in thread safe mode
974    *
975    * 'lock_fns' is the XLockDisplay function pointer of the X11 display 'dpy'.
976    * It wll be NULL if XInitThreads wasn't called.
977    */
978   return pcp->base.psc->dpy->lock_fns != NULL;
979}
980
981static const __DRIdri2LoaderExtension dri2LoaderExtension = {
982   .base = { __DRI_DRI2_LOADER, 3 },
983
984   .getBuffers              = dri2GetBuffers,
985   .flushFrontBuffer        = dri2FlushFrontBuffer,
986   .getBuffersWithFormat    = dri2GetBuffersWithFormat,
987};
988
989static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
990   .base = { __DRI_DRI2_LOADER, 3 },
991
992   .getBuffers              = dri2GetBuffers,
993   .flushFrontBuffer        = dri2FlushFrontBuffer,
994   .getBuffersWithFormat    = NULL,
995};
996
997static const __DRIuseInvalidateExtension dri2UseInvalidate = {
998   .base = { __DRI_USE_INVALIDATE, 1 }
999};
1000
1001static const __DRIbackgroundCallableExtension driBackgroundCallable = {
1002   .base = { __DRI_BACKGROUND_CALLABLE, 2 },
1003
1004   .setBackgroundContext    = driSetBackgroundContext,
1005   .isThreadSafe            = driIsThreadSafe,
1006};
1007
1008_X_HIDDEN void
1009dri2InvalidateBuffers(Display *dpy, XID drawable)
1010{
1011   __GLXDRIdrawable *pdraw =
1012      dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
1013   struct dri2_screen *psc;
1014   struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
1015
1016   if (!pdraw)
1017      return;
1018
1019   psc = (struct dri2_screen *) pdraw->psc;
1020
1021   if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
1022       psc->f->invalidate(pdp->driDrawable);
1023}
1024
1025static void
1026dri2_bind_tex_image(Display * dpy,
1027		    GLXDrawable drawable,
1028		    int buffer, const int *attrib_list)
1029{
1030   struct glx_context *gc = __glXGetCurrentContext();
1031   struct dri2_context *pcp = (struct dri2_context *) gc;
1032   __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
1033   struct glx_display *dpyPriv = __glXInitialize(dpy);
1034   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
1035   struct dri2_display *pdp;
1036   struct dri2_screen *psc;
1037
1038   if (dpyPriv == NULL)
1039       return;
1040
1041   pdp = (struct dri2_display *) dpyPriv->dri2Display;
1042
1043   if (pdraw != NULL) {
1044      psc = (struct dri2_screen *) base->psc;
1045
1046      if (!pdp->invalidateAvailable && psc->f &&
1047           psc->f->base.version >= 3 && psc->f->invalidate)
1048	 psc->f->invalidate(pdraw->driDrawable);
1049
1050      if (psc->texBuffer->base.version >= 2 &&
1051	  psc->texBuffer->setTexBuffer2 != NULL) {
1052	 (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
1053					   pdraw->base.textureTarget,
1054					   pdraw->base.textureFormat,
1055					   pdraw->driDrawable);
1056      }
1057      else {
1058	 (*psc->texBuffer->setTexBuffer) (pcp->driContext,
1059					  pdraw->base.textureTarget,
1060					  pdraw->driDrawable);
1061      }
1062   }
1063}
1064
1065static void
1066dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
1067{
1068   struct glx_context *gc = __glXGetCurrentContext();
1069   struct dri2_context *pcp = (struct dri2_context *) gc;
1070   __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
1071   struct glx_display *dpyPriv = __glXInitialize(dpy);
1072   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
1073   struct dri2_screen *psc;
1074
1075   if (dpyPriv != NULL && pdraw != NULL) {
1076      psc = (struct dri2_screen *) base->psc;
1077
1078      if (psc->texBuffer->base.version >= 3 &&
1079          psc->texBuffer->releaseTexBuffer != NULL) {
1080         (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
1081                                           pdraw->base.textureTarget,
1082                                           pdraw->driDrawable);
1083      }
1084   }
1085}
1086
1087static const struct glx_context_vtable dri2_context_vtable = {
1088   .destroy             = dri2_destroy_context,
1089   .bind                = dri2_bind_context,
1090   .unbind              = dri2_unbind_context,
1091   .wait_gl             = dri2_wait_gl,
1092   .wait_x              = dri2_wait_x,
1093   .use_x_font          = DRI_glXUseXFont,
1094   .bind_tex_image      = dri2_bind_tex_image,
1095   .release_tex_image   = dri2_release_tex_image,
1096   .get_proc_address    = NULL,
1097   .interop_query_device_info = dri2_interop_query_device_info,
1098   .interop_export_object = dri2_interop_export_object
1099};
1100
1101static void
1102dri2BindExtensions(struct dri2_screen *psc, struct glx_display * priv,
1103                   const char *driverName)
1104{
1105   const struct dri2_display *const pdp = (struct dri2_display *)
1106      priv->dri2Display;
1107   const __DRIextension **extensions;
1108   int i;
1109
1110   extensions = psc->core->getExtensions(psc->driScreen);
1111
1112   __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
1113   __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
1114   __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
1115
1116   /*
1117    * GLX_INTEL_swap_event is broken on the server side, where it's
1118    * currently unconditionally enabled. This completely breaks
1119    * systems running on drivers which don't support that extension.
1120    * There's no way to test for its presence on this side, so instead
1121    * of disabling it unconditionally, just disable it for drivers
1122    * which are known to not support it, or for DDX drivers supporting
1123    * only an older (pre-ScheduleSwap) version of DRI2.
1124    *
1125    * This is a hack which is required until:
1126    * http://lists.x.org/archives/xorg-devel/2013-February/035449.html
1127    * is merged and updated xserver makes it's way into distros:
1128    */
1129   if (pdp->swapAvailable && strcmp(driverName, "vmwgfx") != 0) {
1130      __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
1131   }
1132
1133   if (psc->dri2->base.version >= 3) {
1134      const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
1135
1136      __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
1137      __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
1138
1139      if ((mask & ((1 << __DRI_API_GLES) |
1140                   (1 << __DRI_API_GLES2) |
1141                   (1 << __DRI_API_GLES3))) != 0) {
1142         __glXEnableDirectExtension(&psc->base,
1143                                    "GLX_EXT_create_context_es_profile");
1144         __glXEnableDirectExtension(&psc->base,
1145                                    "GLX_EXT_create_context_es2_profile");
1146      }
1147   }
1148
1149   for (i = 0; extensions[i]; i++) {
1150      if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
1151	 psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
1152	 __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
1153      }
1154
1155      if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
1156	 psc->f = (__DRI2flushExtension *) extensions[i];
1157	 /* internal driver extension, no GL extension exposed */
1158      }
1159
1160      if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
1161	 psc->config = (__DRI2configQueryExtension *) extensions[i];
1162
1163      if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1164	 psc->throttle = (__DRI2throttleExtension *) extensions[i];
1165
1166      /* DRI2 version 3 is also required because
1167       * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1168       */
1169      if (psc->dri2->base.version >= 3
1170          && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1171         __glXEnableDirectExtension(&psc->base,
1172                                    "GLX_ARB_create_context_robustness");
1173
1174      /* DRI2 version 3 is also required because
1175       * GLX_ARB_create_context_no_error requires GLX_ARB_create_context.
1176       */
1177      if (psc->dri2->base.version >= 3
1178          && strcmp(extensions[i]->name, __DRI2_NO_ERROR) == 0)
1179         __glXEnableDirectExtension(&psc->base,
1180                                    "GLX_ARB_create_context_no_error");
1181
1182      /* DRI2 version 3 is also required because GLX_MESA_query_renderer
1183       * requires GLX_ARB_create_context_profile.
1184       */
1185      if (psc->dri2->base.version >= 3
1186          && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
1187         psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
1188         __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
1189      }
1190
1191      if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
1192	 psc->interop = (__DRI2interopExtension*)extensions[i];
1193
1194      /* DRI2 version 3 is also required because
1195       * GLX_ARB_control_flush_control requires GLX_ARB_create_context.
1196       */
1197      if (psc->dri2->base.version >= 3
1198          && strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0)
1199         __glXEnableDirectExtension(&psc->base,
1200                                    "GLX_ARB_context_flush_control");
1201   }
1202}
1203
1204static const struct glx_screen_vtable dri2_screen_vtable = {
1205   .create_context         = dri2_create_context,
1206   .create_context_attribs = dri2_create_context_attribs,
1207   .query_renderer_integer = dri2_query_renderer_integer,
1208   .query_renderer_string  = dri2_query_renderer_string,
1209};
1210
1211static struct glx_screen *
1212dri2CreateScreen(int screen, struct glx_display * priv)
1213{
1214   const __DRIconfig **driver_configs;
1215   const __DRIextension **extensions;
1216   const struct dri2_display *const pdp = (struct dri2_display *)
1217      priv->dri2Display;
1218   struct dri2_screen *psc;
1219   __GLXDRIscreen *psp;
1220   struct glx_config *configs = NULL, *visuals = NULL;
1221   char *driverName = NULL, *loader_driverName, *deviceName, *tmp;
1222   drm_magic_t magic;
1223   int i;
1224   unsigned char disable;
1225
1226   psc = calloc(1, sizeof *psc);
1227   if (psc == NULL)
1228      return NULL;
1229
1230   psc->fd = -1;
1231
1232   if (!glx_screen_init(&psc->base, screen, priv)) {
1233      free(psc);
1234      return NULL;
1235   }
1236
1237   if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1238		    &driverName, &deviceName)) {
1239      glx_screen_cleanup(&psc->base);
1240      free(psc);
1241      InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1242      return NULL;
1243   }
1244
1245   psc->fd = loader_open_device(deviceName);
1246   if (psc->fd < 0) {
1247      ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1248      goto handle_error;
1249   }
1250
1251   if (drmGetMagic(psc->fd, &magic)) {
1252      ErrorMessageF("failed to get magic\n");
1253      goto handle_error;
1254   }
1255
1256   if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1257      ErrorMessageF("failed to authenticate magic %d\n", magic);
1258      goto handle_error;
1259   }
1260
1261   /* If Mesa knows about the appropriate driver for this fd, then trust it.
1262    * Otherwise, default to the server's value.
1263    */
1264   loader_driverName = loader_get_driver_for_fd(psc->fd);
1265   if (loader_driverName) {
1266      free(driverName);
1267      driverName = loader_driverName;
1268   }
1269
1270   extensions = driOpenDriver(driverName, &psc->driver);
1271   if (extensions == NULL)
1272      goto handle_error;
1273
1274   for (i = 0; extensions[i]; i++) {
1275      if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1276	 psc->core = (__DRIcoreExtension *) extensions[i];
1277      if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1278	 psc->dri2 = (__DRIdri2Extension *) extensions[i];
1279   }
1280
1281   if (psc->core == NULL || psc->dri2 == NULL) {
1282      ErrorMessageF("core dri or dri2 extension not found\n");
1283      goto handle_error;
1284   }
1285
1286   if (psc->dri2->base.version >= 4) {
1287      psc->driScreen =
1288         psc->dri2->createNewScreen2(screen, psc->fd,
1289                                     (const __DRIextension **)
1290                                     &pdp->loader_extensions[0],
1291                                     extensions,
1292                                     &driver_configs, psc);
1293   } else {
1294      psc->driScreen =
1295         psc->dri2->createNewScreen(screen, psc->fd,
1296                                    (const __DRIextension **)
1297                                    &pdp->loader_extensions[0],
1298                                    &driver_configs, psc);
1299   }
1300
1301   if (psc->driScreen == NULL) {
1302      ErrorMessageF("failed to create dri screen\n");
1303      goto handle_error;
1304   }
1305
1306   dri2BindExtensions(psc, priv, driverName);
1307
1308   configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1309   visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1310
1311   if (!configs || !visuals) {
1312       ErrorMessageF("No matching fbConfigs or visuals found\n");
1313       goto handle_error;
1314   }
1315
1316   glx_config_destroy_list(psc->base.configs);
1317   psc->base.configs = configs;
1318   glx_config_destroy_list(psc->base.visuals);
1319   psc->base.visuals = visuals;
1320
1321   psc->driver_configs = driver_configs;
1322
1323   psc->base.vtable = &dri2_screen_vtable;
1324   psp = &psc->vtable;
1325   psc->base.driScreen = psp;
1326   psp->destroyScreen = dri2DestroyScreen;
1327   psp->createDrawable = dri2CreateDrawable;
1328   psp->swapBuffers = dri2SwapBuffers;
1329   psp->getDrawableMSC = NULL;
1330   psp->waitForMSC = NULL;
1331   psp->waitForSBC = NULL;
1332   psp->setSwapInterval = NULL;
1333   psp->getSwapInterval = NULL;
1334   psp->getBufferAge = NULL;
1335
1336   if (pdp->driMinor >= 2) {
1337      psp->getDrawableMSC = dri2DrawableGetMSC;
1338      psp->waitForMSC = dri2WaitForMSC;
1339      psp->waitForSBC = dri2WaitForSBC;
1340      psp->setSwapInterval = dri2SetSwapInterval;
1341      psp->getSwapInterval = dri2GetSwapInterval;
1342      if (psc->config->configQueryb(psc->driScreen,
1343                                    "glx_disable_oml_sync_control",
1344                                    &disable) || !disable)
1345         __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1346   }
1347
1348   if (psc->config->configQueryb(psc->driScreen,
1349                                 "glx_disable_sgi_video_sync",
1350                                 &disable) || !disable)
1351      __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
1352
1353   /* DRI2 supports SubBuffer through DRI2CopyRegion, so it's always
1354    * available.*/
1355   psp->copySubBuffer = dri2CopySubBuffer;
1356   __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1357
1358   free(driverName);
1359   free(deviceName);
1360
1361   tmp = getenv("LIBGL_SHOW_FPS");
1362   psc->show_fps_interval = (tmp) ? atoi(tmp) : 0;
1363   if (psc->show_fps_interval < 0)
1364      psc->show_fps_interval = 0;
1365
1366   InfoMessageF("Using DRI2 for screen %d\n", screen);
1367
1368   return &psc->base;
1369
1370handle_error:
1371   CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1372
1373   if (configs)
1374       glx_config_destroy_list(configs);
1375   if (visuals)
1376       glx_config_destroy_list(visuals);
1377   if (psc->driScreen)
1378       psc->core->destroyScreen(psc->driScreen);
1379   psc->driScreen = NULL;
1380   if (psc->fd >= 0)
1381      close(psc->fd);
1382   if (psc->driver)
1383      dlclose(psc->driver);
1384
1385   free(driverName);
1386   free(deviceName);
1387   glx_screen_cleanup(&psc->base);
1388   free(psc);
1389
1390   return NULL;
1391}
1392
1393/* Called from __glXFreeDisplayPrivate.
1394 */
1395static void
1396dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1397{
1398   struct dri2_display *pdp = (struct dri2_display *) dpy;
1399
1400   __glxHashDestroy(pdp->dri2Hash);
1401   free(dpy);
1402}
1403
1404_X_HIDDEN __GLXDRIdrawable *
1405dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1406{
1407   struct glx_display *d = __glXInitialize(dpy);
1408   struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1409   __GLXDRIdrawable *pdraw;
1410
1411   if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1412      return pdraw;
1413
1414   return NULL;
1415}
1416
1417/*
1418 * Allocate, initialize and return a __DRIdisplayPrivate object.
1419 * This is called from __glXInitialize() when we are given a new
1420 * display pointer.
1421 */
1422_X_HIDDEN __GLXDRIdisplay *
1423dri2CreateDisplay(Display * dpy)
1424{
1425   struct dri2_display *pdp;
1426   int eventBase, errorBase, i;
1427
1428   if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1429      return NULL;
1430
1431   pdp = malloc(sizeof *pdp);
1432   if (pdp == NULL)
1433      return NULL;
1434
1435   if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1436      free(pdp);
1437      return NULL;
1438   }
1439
1440   pdp->driPatch = 0;
1441   pdp->swapAvailable = (pdp->driMinor >= 2);
1442   pdp->invalidateAvailable = (pdp->driMinor >= 3);
1443
1444   pdp->base.destroyDisplay = dri2DestroyDisplay;
1445   pdp->base.createScreen = dri2CreateScreen;
1446
1447   i = 0;
1448   if (pdp->driMinor < 1)
1449      pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1450   else
1451      pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1452
1453   pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1454
1455   pdp->loader_extensions[i++] = &driBackgroundCallable.base;
1456
1457   pdp->loader_extensions[i++] = NULL;
1458
1459   pdp->dri2Hash = __glxHashCreate();
1460   if (pdp->dri2Hash == NULL) {
1461      free(pdp);
1462      return NULL;
1463   }
1464
1465   return &pdp->base;
1466}
1467
1468#endif /* GLX_DIRECT_RENDERING */
1469