dri2_glx.c revision 848b8605 
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[4];
78};
79
80struct dri2_context
81{
82   struct glx_context base;
83   __DRIcontext *driContext;
84};
85
86struct dri2_drawable
87{
88   __GLXDRIdrawable base;
89   __DRIdrawable *driDrawable;
90   __DRIbuffer buffers[5];
91   int bufferCount;
92   int width, height;
93   int have_back;
94   int have_fake_front;
95   int swap_interval;
96
97   uint64_t previous_time;
98   unsigned frames;
99};
100
101static const struct glx_context_vtable dri2_context_vtable;
102
103/* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
104 * low halves separately.  This helps you split them.
105 */
106static void
107split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
108{
109   *hi = (counter >> 32);
110   *lo = counter & 0xffffffff;
111}
112
113static uint64_t
114merge_counter(uint32_t hi, uint32_t lo)
115{
116   return ((uint64_t)hi << 32) | lo;
117}
118
119static void
120dri2_destroy_context(struct glx_context *context)
121{
122   struct dri2_context *pcp = (struct dri2_context *) context;
123   struct dri2_screen *psc = (struct dri2_screen *) context->psc;
124
125   driReleaseDrawables(&pcp->base);
126
127   free((char *) context->extensions);
128
129   (*psc->core->destroyContext) (pcp->driContext);
130
131   free(pcp);
132}
133
134static Bool
135dri2_bind_context(struct glx_context *context, struct glx_context *old,
136		  GLXDrawable draw, GLXDrawable read)
137{
138   struct dri2_context *pcp = (struct dri2_context *) context;
139   struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
140   struct dri2_drawable *pdraw, *pread;
141   __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
142   struct glx_display *dpyPriv = psc->base.display;
143   struct dri2_display *pdp;
144
145   pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
146   pread = (struct dri2_drawable *) driFetchDrawable(context, read);
147
148   driReleaseDrawables(&pcp->base);
149
150   if (pdraw)
151      dri_draw = pdraw->driDrawable;
152   else if (draw != None)
153      return GLXBadDrawable;
154
155   if (pread)
156      dri_read = pread->driDrawable;
157   else if (read != None)
158      return GLXBadDrawable;
159
160   if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
161      return GLXBadContext;
162
163   /* If the server doesn't send invalidate events, we may miss a
164    * resize before the rendering starts.  Invalidate the buffers now
165    * so the driver will recheck before rendering starts. */
166   pdp = (struct dri2_display *) dpyPriv->dri2Display;
167   if (!pdp->invalidateAvailable && pdraw) {
168      dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
169      if (pread != pdraw && pread)
170	 dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
171   }
172
173   return Success;
174}
175
176static void
177dri2_unbind_context(struct glx_context *context, struct glx_context *new)
178{
179   struct dri2_context *pcp = (struct dri2_context *) context;
180   struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
181
182   (*psc->core->unbindContext) (pcp->driContext);
183}
184
185static struct glx_context *
186dri2_create_context(struct glx_screen *base,
187		    struct glx_config *config_base,
188		    struct glx_context *shareList, int renderType)
189{
190   struct dri2_context *pcp, *pcp_shared;
191   struct dri2_screen *psc = (struct dri2_screen *) base;
192   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
193   __DRIcontext *shared = NULL;
194
195   /* Check the renderType value */
196   if (!validate_renderType_against_config(config_base, renderType))
197       return NULL;
198
199   if (shareList) {
200      /* If the shareList context is not a DRI2 context, we cannot possibly
201       * create a DRI2 context that shares it.
202       */
203      if (shareList->vtable->destroy != dri2_destroy_context) {
204	 return NULL;
205      }
206
207      pcp_shared = (struct dri2_context *) shareList;
208      shared = pcp_shared->driContext;
209   }
210
211   pcp = calloc(1, sizeof *pcp);
212   if (pcp == NULL)
213      return NULL;
214
215   if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
216      free(pcp);
217      return NULL;
218   }
219
220   pcp->base.renderType = renderType;
221
222   pcp->driContext =
223      (*psc->dri2->createNewContext) (psc->driScreen,
224                                      config->driConfig, shared, pcp);
225
226   if (pcp->driContext == NULL) {
227      free(pcp);
228      return NULL;
229   }
230
231   pcp->base.vtable = &dri2_context_vtable;
232
233   return &pcp->base;
234}
235
236static struct glx_context *
237dri2_create_context_attribs(struct glx_screen *base,
238			    struct glx_config *config_base,
239			    struct glx_context *shareList,
240			    unsigned num_attribs,
241			    const uint32_t *attribs,
242			    unsigned *error)
243{
244   struct dri2_context *pcp = NULL;
245   struct dri2_context *pcp_shared = NULL;
246   struct dri2_screen *psc = (struct dri2_screen *) base;
247   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
248   __DRIcontext *shared = NULL;
249
250   uint32_t minor_ver;
251   uint32_t major_ver;
252   uint32_t renderType;
253   uint32_t flags;
254   unsigned api;
255   int reset;
256   uint32_t ctx_attribs[2 * 5];
257   unsigned num_ctx_attribs = 0;
258
259   if (psc->dri2->base.version < 3) {
260      *error = __DRI_CTX_ERROR_NO_MEMORY;
261      goto error_exit;
262   }
263
264   /* Remap the GLX tokens to DRI2 tokens.
265    */
266   if (!dri2_convert_glx_attribs(num_attribs, attribs,
267                                 &major_ver, &minor_ver, &renderType, &flags,
268                                 &api, &reset, error))
269      goto error_exit;
270
271   /* Check the renderType value */
272   if (!validate_renderType_against_config(config_base, renderType))
273       goto error_exit;
274
275   if (shareList) {
276      pcp_shared = (struct dri2_context *) shareList;
277      shared = pcp_shared->driContext;
278   }
279
280   pcp = calloc(1, sizeof *pcp);
281   if (pcp == NULL) {
282      *error = __DRI_CTX_ERROR_NO_MEMORY;
283      goto error_exit;
284   }
285
286   if (!glx_context_init(&pcp->base, &psc->base, &config->base))
287      goto error_exit;
288
289   ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
290   ctx_attribs[num_ctx_attribs++] = major_ver;
291   ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
292   ctx_attribs[num_ctx_attribs++] = minor_ver;
293
294   /* Only send a value when the non-default value is requested.  By doing
295    * this we don't have to check the driver's DRI2 version before sending the
296    * default value.
297    */
298   if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
299      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
300      ctx_attribs[num_ctx_attribs++] = reset;
301   }
302
303   if (flags != 0) {
304      ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
305
306      /* The current __DRI_CTX_FLAG_* values are identical to the
307       * GLX_CONTEXT_*_BIT values.
308       */
309      ctx_attribs[num_ctx_attribs++] = flags;
310   }
311
312   /* The renderType is retrieved from attribs, or set to default
313    *  of GLX_RGBA_TYPE.
314    */
315   pcp->base.renderType = renderType;
316
317   pcp->driContext =
318      (*psc->dri2->createContextAttribs) (psc->driScreen,
319					  api,
320					  config->driConfig,
321					  shared,
322					  num_ctx_attribs / 2,
323					  ctx_attribs,
324					  error,
325					  pcp);
326
327   if (pcp->driContext == NULL)
328      goto error_exit;
329
330   pcp->base.vtable = &dri2_context_vtable;
331
332   return &pcp->base;
333
334error_exit:
335   free(pcp);
336
337   return NULL;
338}
339
340static void
341dri2DestroyDrawable(__GLXDRIdrawable *base)
342{
343   struct dri2_screen *psc = (struct dri2_screen *) base->psc;
344   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
345   struct glx_display *dpyPriv = psc->base.display;
346   struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
347
348   __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
349   (*psc->core->destroyDrawable) (pdraw->driDrawable);
350
351   /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
352    * now, as the application explicitly asked to destroy the GLX
353    * drawable.  Otherwise, for legacy drawables, we let the DRI2
354    * drawable linger on the server, since there's no good way of
355    * knowing when the application is done with it.  The server will
356    * destroy the DRI2 drawable when it destroys the X drawable or the
357    * client exits anyway. */
358   if (pdraw->base.xDrawable != pdraw->base.drawable)
359      DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
360
361   free(pdraw);
362}
363
364static __GLXDRIdrawable *
365dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
366		   GLXDrawable drawable, struct glx_config *config_base)
367{
368   struct dri2_drawable *pdraw;
369   struct dri2_screen *psc = (struct dri2_screen *) base;
370   __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
371   struct glx_display *dpyPriv;
372   struct dri2_display *pdp;
373   GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
374
375   dpyPriv = __glXInitialize(psc->base.dpy);
376   if (dpyPriv == NULL)
377      return NULL;
378
379   pdraw = calloc(1, sizeof(*pdraw));
380   if (!pdraw)
381      return NULL;
382
383   pdraw->base.destroyDrawable = dri2DestroyDrawable;
384   pdraw->base.xDrawable = xDrawable;
385   pdraw->base.drawable = drawable;
386   pdraw->base.psc = &psc->base;
387   pdraw->bufferCount = 0;
388   pdraw->swap_interval = 1; /* default may be overridden below */
389   pdraw->have_back = 0;
390
391   if (psc->config)
392      psc->config->configQueryi(psc->driScreen,
393				"vblank_mode", &vblank_mode);
394
395   switch (vblank_mode) {
396   case DRI_CONF_VBLANK_NEVER:
397   case DRI_CONF_VBLANK_DEF_INTERVAL_0:
398      pdraw->swap_interval = 0;
399      break;
400   case DRI_CONF_VBLANK_DEF_INTERVAL_1:
401   case DRI_CONF_VBLANK_ALWAYS_SYNC:
402   default:
403      pdraw->swap_interval = 1;
404      break;
405   }
406
407   DRI2CreateDrawable(psc->base.dpy, xDrawable);
408   pdp = (struct dri2_display *)dpyPriv->dri2Display;;
409   /* Create a new drawable */
410   pdraw->driDrawable =
411      (*psc->dri2->createNewDrawable) (psc->driScreen,
412                                       config->driConfig, pdraw);
413
414   if (!pdraw->driDrawable) {
415      DRI2DestroyDrawable(psc->base.dpy, xDrawable);
416      free(pdraw);
417      return NULL;
418   }
419
420   if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
421      (*psc->core->destroyDrawable) (pdraw->driDrawable);
422      DRI2DestroyDrawable(psc->base.dpy, xDrawable);
423      free(pdraw);
424      return None;
425   }
426
427   /*
428    * Make sure server has the same swap interval we do for the new
429    * drawable.
430    */
431   if (psc->vtable.setSwapInterval)
432      psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval);
433
434   return &pdraw->base;
435}
436
437static int
438dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
439		   int64_t *ust, int64_t *msc, int64_t *sbc)
440{
441   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
442   xcb_dri2_get_msc_cookie_t get_msc_cookie;
443   xcb_dri2_get_msc_reply_t *get_msc_reply;
444
445   get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
446   get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
447
448   if (!get_msc_reply)
449      return 0;
450
451   *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
452   *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
453   *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
454   free(get_msc_reply);
455
456   return 1;
457}
458
459static int
460dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
461	       int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
462{
463   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
464   xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
465   xcb_dri2_wait_msc_reply_t *wait_msc_reply;
466   uint32_t target_msc_hi, target_msc_lo;
467   uint32_t divisor_hi, divisor_lo;
468   uint32_t remainder_hi, remainder_lo;
469
470   split_counter(target_msc, &target_msc_hi, &target_msc_lo);
471   split_counter(divisor, &divisor_hi, &divisor_lo);
472   split_counter(remainder, &remainder_hi, &remainder_lo);
473
474   wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
475                                                 target_msc_hi, target_msc_lo,
476                                                 divisor_hi, divisor_lo,
477                                                 remainder_hi, remainder_lo);
478   wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
479
480   if (!wait_msc_reply)
481      return 0;
482
483   *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
484   *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
485   *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
486   free(wait_msc_reply);
487
488   return 1;
489}
490
491static int
492dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
493	       int64_t *msc, int64_t *sbc)
494{
495   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
496   xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
497   xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
498   uint32_t target_sbc_hi, target_sbc_lo;
499
500   split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
501
502   wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
503                                                 target_sbc_hi, target_sbc_lo);
504   wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
505
506   if (!wait_sbc_reply)
507      return 0;
508
509   *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
510   *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
511   *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
512   free(wait_sbc_reply);
513
514   return 1;
515}
516
517static __DRIcontext *
518dri2GetCurrentContext()
519{
520   struct glx_context *gc = __glXGetCurrentContext();
521   struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
522
523   return dri2Ctx ? dri2Ctx->driContext : NULL;
524}
525
526/**
527 * dri2Throttle - Request driver throttling
528 *
529 * This function uses the DRI2 throttle extension to give the
530 * driver the opportunity to throttle on flush front, copysubbuffer
531 * and swapbuffers.
532 */
533static void
534dri2Throttle(struct dri2_screen *psc,
535	     struct dri2_drawable *draw,
536	     enum __DRI2throttleReason reason)
537{
538   if (psc->throttle) {
539      __DRIcontext *ctx = dri2GetCurrentContext();
540
541      psc->throttle->throttle(ctx, draw->driDrawable, reason);
542   }
543}
544
545/**
546 * Asks the driver to flush any queued work necessary for serializing with the
547 * X command stream, and optionally the slightly more strict requirement of
548 * glFlush() equivalence (which would require flushing even if nothing had
549 * been drawn to a window system framebuffer, for example).
550 */
551static void
552dri2Flush(struct dri2_screen *psc,
553          __DRIcontext *ctx,
554          struct dri2_drawable *draw,
555          unsigned flags,
556          enum __DRI2throttleReason throttle_reason)
557{
558   if (ctx && psc->f && psc->f->base.version >= 4) {
559      psc->f->flush_with_flags(ctx, draw->driDrawable, flags, throttle_reason);
560   } else {
561      if (flags & __DRI2_FLUSH_CONTEXT)
562         glFlush();
563
564      if (psc->f)
565         psc->f->flush(draw->driDrawable);
566
567      dri2Throttle(psc, draw, throttle_reason);
568   }
569}
570
571static void
572__dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
573		    int width, int height,
574		    enum __DRI2throttleReason reason, Bool flush)
575{
576   struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
577   struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
578   XRectangle xrect;
579   XserverRegion region;
580   __DRIcontext *ctx = dri2GetCurrentContext();
581   unsigned flags;
582
583   /* Check we have the right attachments */
584   if (!priv->have_back)
585      return;
586
587   xrect.x = x;
588   xrect.y = priv->height - y - height;
589   xrect.width = width;
590   xrect.height = height;
591
592   flags = __DRI2_FLUSH_DRAWABLE;
593   if (flush)
594      flags |= __DRI2_FLUSH_CONTEXT;
595   dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
596
597   region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
598   DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
599                  DRI2BufferFrontLeft, DRI2BufferBackLeft);
600
601   /* Refresh the fake front (if present) after we just damaged the real
602    * front.
603    */
604   if (priv->have_fake_front)
605      DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
606		     DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
607
608   XFixesDestroyRegion(psc->base.dpy, region);
609}
610
611static void
612dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
613		  int width, int height, Bool flush)
614{
615   __dri2CopySubBuffer(pdraw, x, y, width, height,
616		       __DRI2_THROTTLE_COPYSUBBUFFER, flush);
617}
618
619
620static void
621dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
622{
623   XRectangle xrect;
624   XserverRegion region;
625   struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
626
627   xrect.x = 0;
628   xrect.y = 0;
629   xrect.width = priv->width;
630   xrect.height = priv->height;
631
632   if (psc->f)
633      (*psc->f->flush) (priv->driDrawable);
634
635   region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
636   DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
637   XFixesDestroyRegion(psc->base.dpy, region);
638
639}
640
641static void
642dri2_wait_x(struct glx_context *gc)
643{
644   struct dri2_drawable *priv = (struct dri2_drawable *)
645      GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
646
647   if (priv == NULL || !priv->have_fake_front)
648      return;
649
650   dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
651}
652
653static void
654dri2_wait_gl(struct glx_context *gc)
655{
656   struct dri2_drawable *priv = (struct dri2_drawable *)
657      GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
658
659   if (priv == NULL || !priv->have_fake_front)
660      return;
661
662   dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
663}
664
665/**
666 * Called by the driver when it needs to update the real front buffer with the
667 * contents of its fake front buffer.
668 */
669static void
670dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
671{
672   struct glx_display *priv;
673   struct dri2_display *pdp;
674   struct glx_context *gc;
675   struct dri2_drawable *pdraw = loaderPrivate;
676   struct dri2_screen *psc;
677
678   if (!pdraw)
679      return;
680
681   if (!pdraw->base.psc)
682      return;
683
684   psc = (struct dri2_screen *) pdraw->base.psc;
685
686   priv = __glXInitialize(psc->base.dpy);
687
688   if (priv == NULL)
689       return;
690
691   pdp = (struct dri2_display *) priv->dri2Display;
692   gc = __glXGetCurrentContext();
693
694   dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
695
696   /* Old servers don't send invalidate events */
697   if (!pdp->invalidateAvailable)
698       dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
699
700   dri2_wait_gl(gc);
701}
702
703
704static void
705dri2DestroyScreen(struct glx_screen *base)
706{
707   struct dri2_screen *psc = (struct dri2_screen *) base;
708
709   /* Free the direct rendering per screen data */
710   (*psc->core->destroyScreen) (psc->driScreen);
711   driDestroyConfigs(psc->driver_configs);
712   close(psc->fd);
713   free(psc);
714}
715
716/**
717 * Process list of buffer received from the server
718 *
719 * Processes the list of buffers received in a reply from the server to either
720 * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
721 */
722static void
723process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
724                unsigned count)
725{
726   int i;
727
728   pdraw->bufferCount = count;
729   pdraw->have_fake_front = 0;
730   pdraw->have_back = 0;
731
732   /* This assumes the DRI2 buffer attachment tokens matches the
733    * __DRIbuffer tokens. */
734   for (i = 0; i < count; i++) {
735      pdraw->buffers[i].attachment = buffers[i].attachment;
736      pdraw->buffers[i].name = buffers[i].name;
737      pdraw->buffers[i].pitch = buffers[i].pitch;
738      pdraw->buffers[i].cpp = buffers[i].cpp;
739      pdraw->buffers[i].flags = buffers[i].flags;
740      if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
741         pdraw->have_fake_front = 1;
742      if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
743         pdraw->have_back = 1;
744   }
745
746}
747
748unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
749{
750      struct glx_display *glx_dpy = __glXInitialize(dpy);
751      __GLXDRIdrawable *pdraw;
752      pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
753      if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
754         return 0;
755      return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
756}
757
758static void show_fps(struct dri2_drawable *draw)
759{
760   const int interval =
761      ((struct dri2_screen *) draw->base.psc)->show_fps_interval;
762   struct timeval tv;
763   uint64_t current_time;
764
765   gettimeofday(&tv, 0);
766   current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
767
768   draw->frames++;
769
770   if (draw->previous_time + interval * 1000000 <= current_time) {
771      if (draw->previous_time) {
772         fprintf(stderr, "libGL: FPS = %.1f\n",
773                 ((uint64_t)draw->frames * 1000000) /
774                 (double)(current_time - draw->previous_time));
775      }
776      draw->frames = 0;
777      draw->previous_time = current_time;
778   }
779}
780
781static int64_t
782dri2XcbSwapBuffers(Display *dpy,
783                  __GLXDRIdrawable *pdraw,
784                  int64_t target_msc,
785                  int64_t divisor,
786                  int64_t remainder)
787{
788   xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
789   xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
790   uint32_t target_msc_hi, target_msc_lo;
791   uint32_t divisor_hi, divisor_lo;
792   uint32_t remainder_hi, remainder_lo;
793   int64_t ret = 0;
794   xcb_connection_t *c = XGetXCBConnection(dpy);
795
796   split_counter(target_msc, &target_msc_hi, &target_msc_lo);
797   split_counter(divisor, &divisor_hi, &divisor_lo);
798   split_counter(remainder, &remainder_hi, &remainder_lo);
799
800   swap_buffers_cookie =
801      xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
802                                      target_msc_hi, target_msc_lo,
803                                      divisor_hi, divisor_lo,
804                                      remainder_hi, remainder_lo);
805
806   /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
807    * to do so some time before reusing a (non-pageflipped) backbuffer.
808    * Otherwise, the new rendering could get ahead of the X Server's
809    * dispatch of the swapbuffer and you'd display garbage.
810    *
811    * We use XSync() first to reap the invalidate events through the event
812    * filter, to ensure that the next drawing doesn't use an invalidated
813    * buffer.
814    */
815   XSync(dpy, False);
816
817   swap_buffers_reply =
818      xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
819   if (swap_buffers_reply) {
820      ret = merge_counter(swap_buffers_reply->swap_hi,
821                          swap_buffers_reply->swap_lo);
822      free(swap_buffers_reply);
823   }
824   return ret;
825}
826
827static int64_t
828dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
829		int64_t remainder, Bool flush)
830{
831    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
832    struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
833    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
834    struct dri2_display *pdp =
835	(struct dri2_display *)dpyPriv->dri2Display;
836    int64_t ret = 0;
837
838    /* Check we have the right attachments */
839    if (!priv->have_back)
840	return ret;
841
842    /* Old servers can't handle swapbuffers */
843    if (!pdp->swapAvailable) {
844       __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
845			   __DRI2_THROTTLE_SWAPBUFFER, flush);
846    } else {
847       __DRIcontext *ctx = dri2GetCurrentContext();
848       unsigned flags = __DRI2_FLUSH_DRAWABLE;
849       if (flush)
850          flags |= __DRI2_FLUSH_CONTEXT;
851       dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
852
853       ret = dri2XcbSwapBuffers(pdraw->psc->dpy, pdraw,
854                                target_msc, divisor, remainder);
855    }
856
857    if (psc->show_fps_interval) {
858       show_fps(priv);
859    }
860
861    /* Old servers don't send invalidate events */
862    if (!pdp->invalidateAvailable)
863       dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
864
865    return ret;
866}
867
868static __DRIbuffer *
869dri2GetBuffers(__DRIdrawable * driDrawable,
870               int *width, int *height,
871               unsigned int *attachments, int count,
872               int *out_count, void *loaderPrivate)
873{
874   struct dri2_drawable *pdraw = loaderPrivate;
875   DRI2Buffer *buffers;
876
877   buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
878                            width, height, attachments, count, out_count);
879   if (buffers == NULL)
880      return NULL;
881
882   pdraw->width = *width;
883   pdraw->height = *height;
884   process_buffers(pdraw, buffers, *out_count);
885
886   free(buffers);
887
888   return pdraw->buffers;
889}
890
891static __DRIbuffer *
892dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
893                         int *width, int *height,
894                         unsigned int *attachments, int count,
895                         int *out_count, void *loaderPrivate)
896{
897   struct dri2_drawable *pdraw = loaderPrivate;
898   DRI2Buffer *buffers;
899
900   buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
901                                      pdraw->base.xDrawable,
902                                      width, height, attachments,
903                                      count, out_count);
904   if (buffers == NULL)
905      return NULL;
906
907   pdraw->width = *width;
908   pdraw->height = *height;
909   process_buffers(pdraw, buffers, *out_count);
910
911   free(buffers);
912
913   return pdraw->buffers;
914}
915
916static int
917dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
918{
919   xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
920   struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
921   GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
922   struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
923
924   if (psc->config)
925      psc->config->configQueryi(psc->driScreen,
926				"vblank_mode", &vblank_mode);
927
928   switch (vblank_mode) {
929   case DRI_CONF_VBLANK_NEVER:
930      if (interval != 0)
931         return GLX_BAD_VALUE;
932      break;
933   case DRI_CONF_VBLANK_ALWAYS_SYNC:
934      if (interval <= 0)
935	 return GLX_BAD_VALUE;
936      break;
937   default:
938      break;
939   }
940
941   xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
942   priv->swap_interval = interval;
943
944   return 0;
945}
946
947static int
948dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
949{
950   struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
951
952  return priv->swap_interval;
953}
954
955static const __DRIdri2LoaderExtension dri2LoaderExtension = {
956   .base = { __DRI_DRI2_LOADER, 3 },
957
958   .getBuffers              = dri2GetBuffers,
959   .flushFrontBuffer        = dri2FlushFrontBuffer,
960   .getBuffersWithFormat    = dri2GetBuffersWithFormat,
961};
962
963static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
964   .base = { __DRI_DRI2_LOADER, 3 },
965
966   .getBuffers              = dri2GetBuffers,
967   .flushFrontBuffer        = dri2FlushFrontBuffer,
968   .getBuffersWithFormat    = NULL,
969};
970
971static const __DRIuseInvalidateExtension dri2UseInvalidate = {
972   .base = { __DRI_USE_INVALIDATE, 1 }
973};
974
975_X_HIDDEN void
976dri2InvalidateBuffers(Display *dpy, XID drawable)
977{
978   __GLXDRIdrawable *pdraw =
979      dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
980   struct dri2_screen *psc;
981   struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
982
983   if (!pdraw)
984      return;
985
986   psc = (struct dri2_screen *) pdraw->psc;
987
988   if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
989       psc->f->invalidate(pdp->driDrawable);
990}
991
992static void
993dri2_bind_tex_image(Display * dpy,
994		    GLXDrawable drawable,
995		    int buffer, const int *attrib_list)
996{
997   struct glx_context *gc = __glXGetCurrentContext();
998   struct dri2_context *pcp = (struct dri2_context *) gc;
999   __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
1000   struct glx_display *dpyPriv = __glXInitialize(dpy);
1001   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
1002   struct dri2_display *pdp;
1003   struct dri2_screen *psc;
1004
1005   if (dpyPriv == NULL)
1006       return;
1007
1008   pdp = (struct dri2_display *) dpyPriv->dri2Display;
1009
1010   if (pdraw != NULL) {
1011      psc = (struct dri2_screen *) base->psc;
1012
1013      if (!pdp->invalidateAvailable && psc->f &&
1014           psc->f->base.version >= 3 && psc->f->invalidate)
1015	 psc->f->invalidate(pdraw->driDrawable);
1016
1017      if (psc->texBuffer->base.version >= 2 &&
1018	  psc->texBuffer->setTexBuffer2 != NULL) {
1019	 (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
1020					   pdraw->base.textureTarget,
1021					   pdraw->base.textureFormat,
1022					   pdraw->driDrawable);
1023      }
1024      else {
1025	 (*psc->texBuffer->setTexBuffer) (pcp->driContext,
1026					  pdraw->base.textureTarget,
1027					  pdraw->driDrawable);
1028      }
1029   }
1030}
1031
1032static void
1033dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
1034{
1035   struct glx_context *gc = __glXGetCurrentContext();
1036   struct dri2_context *pcp = (struct dri2_context *) gc;
1037   __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
1038   struct glx_display *dpyPriv = __glXInitialize(dpy);
1039   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
1040   struct dri2_screen *psc;
1041
1042   if (dpyPriv != NULL && pdraw != NULL) {
1043      psc = (struct dri2_screen *) base->psc;
1044
1045      if (psc->texBuffer->base.version >= 3 &&
1046          psc->texBuffer->releaseTexBuffer != NULL) {
1047         (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
1048                                           pdraw->base.textureTarget,
1049                                           pdraw->driDrawable);
1050      }
1051   }
1052}
1053
1054static const struct glx_context_vtable dri2_context_vtable = {
1055   .destroy             = dri2_destroy_context,
1056   .bind                = dri2_bind_context,
1057   .unbind              = dri2_unbind_context,
1058   .wait_gl             = dri2_wait_gl,
1059   .wait_x              = dri2_wait_x,
1060   .use_x_font          = DRI_glXUseXFont,
1061   .bind_tex_image      = dri2_bind_tex_image,
1062   .release_tex_image   = dri2_release_tex_image,
1063   .get_proc_address    = NULL,
1064};
1065
1066static void
1067dri2BindExtensions(struct dri2_screen *psc, struct glx_display * priv,
1068                   const char *driverName)
1069{
1070   const struct dri2_display *const pdp = (struct dri2_display *)
1071      priv->dri2Display;
1072   const __DRIextension **extensions;
1073   int i;
1074
1075   extensions = psc->core->getExtensions(psc->driScreen);
1076
1077   __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
1078   __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
1079   __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
1080   __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
1081
1082   /*
1083    * GLX_INTEL_swap_event is broken on the server side, where it's
1084    * currently unconditionally enabled. This completely breaks
1085    * systems running on drivers which don't support that extension.
1086    * There's no way to test for its presence on this side, so instead
1087    * of disabling it unconditionally, just disable it for drivers
1088    * which are known to not support it, or for DDX drivers supporting
1089    * only an older (pre-ScheduleSwap) version of DRI2.
1090    *
1091    * This is a hack which is required until:
1092    * http://lists.x.org/archives/xorg-devel/2013-February/035449.html
1093    * is merged and updated xserver makes it's way into distros:
1094    */
1095   if (pdp->swapAvailable && strcmp(driverName, "vmwgfx") != 0) {
1096      __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
1097   }
1098
1099   if (psc->dri2->base.version >= 3) {
1100      const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
1101
1102      __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
1103      __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
1104
1105      if ((mask & (1 << __DRI_API_GLES2)) != 0)
1106	 __glXEnableDirectExtension(&psc->base,
1107				    "GLX_EXT_create_context_es2_profile");
1108   }
1109
1110   for (i = 0; extensions[i]; i++) {
1111      if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
1112	 psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
1113	 __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
1114      }
1115
1116      if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
1117	 psc->f = (__DRI2flushExtension *) extensions[i];
1118	 /* internal driver extension, no GL extension exposed */
1119      }
1120
1121      if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
1122	 psc->config = (__DRI2configQueryExtension *) extensions[i];
1123
1124      if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1125	 psc->throttle = (__DRI2throttleExtension *) extensions[i];
1126
1127      /* DRI2 version 3 is also required because
1128       * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1129       */
1130      if (psc->dri2->base.version >= 3
1131          && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1132         __glXEnableDirectExtension(&psc->base,
1133                                    "GLX_ARB_create_context_robustness");
1134
1135      /* DRI2 version 3 is also required because GLX_MESA_query_renderer
1136       * requires GLX_ARB_create_context_profile.
1137       */
1138      if (psc->dri2->base.version >= 3
1139          && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
1140         psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
1141         __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
1142      }
1143   }
1144}
1145
1146static const struct glx_screen_vtable dri2_screen_vtable = {
1147   .create_context         = dri2_create_context,
1148   .create_context_attribs = dri2_create_context_attribs,
1149   .query_renderer_integer = dri2_query_renderer_integer,
1150   .query_renderer_string  = dri2_query_renderer_string,
1151};
1152
1153static struct glx_screen *
1154dri2CreateScreen(int screen, struct glx_display * priv)
1155{
1156   const __DRIconfig **driver_configs;
1157   const __DRIextension **extensions;
1158   const struct dri2_display *const pdp = (struct dri2_display *)
1159      priv->dri2Display;
1160   struct dri2_screen *psc;
1161   __GLXDRIscreen *psp;
1162   struct glx_config *configs = NULL, *visuals = NULL;
1163   char *driverName = NULL, *loader_driverName, *deviceName, *tmp;
1164   drm_magic_t magic;
1165   int i;
1166
1167   psc = calloc(1, sizeof *psc);
1168   if (psc == NULL)
1169      return NULL;
1170
1171   psc->fd = -1;
1172
1173   if (!glx_screen_init(&psc->base, screen, priv)) {
1174      free(psc);
1175      return NULL;
1176   }
1177
1178   if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1179		    &driverName, &deviceName)) {
1180      glx_screen_cleanup(&psc->base);
1181      free(psc);
1182      InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1183      return NULL;
1184   }
1185
1186#ifdef O_CLOEXEC
1187   psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1188   if (psc->fd == -1 && errno == EINVAL)
1189#endif
1190   {
1191      psc->fd = open(deviceName, O_RDWR);
1192      if (psc->fd != -1)
1193         fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1194   }
1195   if (psc->fd < 0) {
1196      ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1197      goto handle_error;
1198   }
1199
1200   if (drmGetMagic(psc->fd, &magic)) {
1201      ErrorMessageF("failed to get magic\n");
1202      goto handle_error;
1203   }
1204
1205   if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1206      ErrorMessageF("failed to authenticate magic %d\n", magic);
1207      goto handle_error;
1208   }
1209
1210   /* If Mesa knows about the appropriate driver for this fd, then trust it.
1211    * Otherwise, default to the server's value.
1212    */
1213   loader_driverName = loader_get_driver_for_fd(psc->fd, 0);
1214   if (loader_driverName) {
1215      free(driverName);
1216      driverName = loader_driverName;
1217   }
1218
1219   psc->driver = driOpenDriver(driverName);
1220   if (psc->driver == NULL) {
1221      ErrorMessageF("driver pointer missing\n");
1222      goto handle_error;
1223   }
1224
1225   extensions = driGetDriverExtensions(psc->driver, driverName);
1226   if (extensions == NULL)
1227      goto handle_error;
1228
1229   for (i = 0; extensions[i]; i++) {
1230      if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1231	 psc->core = (__DRIcoreExtension *) extensions[i];
1232      if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1233	 psc->dri2 = (__DRIdri2Extension *) extensions[i];
1234   }
1235
1236   if (psc->core == NULL || psc->dri2 == NULL) {
1237      ErrorMessageF("core dri or dri2 extension not found\n");
1238      goto handle_error;
1239   }
1240
1241   if (psc->dri2->base.version >= 4) {
1242      psc->driScreen =
1243         psc->dri2->createNewScreen2(screen, psc->fd,
1244                                     (const __DRIextension **)
1245                                     &pdp->loader_extensions[0],
1246                                     extensions,
1247                                     &driver_configs, psc);
1248   } else {
1249      psc->driScreen =
1250         psc->dri2->createNewScreen(screen, psc->fd,
1251                                    (const __DRIextension **)
1252                                    &pdp->loader_extensions[0],
1253                                    &driver_configs, psc);
1254   }
1255
1256   if (psc->driScreen == NULL) {
1257      ErrorMessageF("failed to create dri screen\n");
1258      goto handle_error;
1259   }
1260
1261   dri2BindExtensions(psc, priv, driverName);
1262
1263   configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1264   visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1265
1266   if (!configs || !visuals) {
1267       ErrorMessageF("No matching fbConfigs or visuals found\n");
1268       goto handle_error;
1269   }
1270
1271   glx_config_destroy_list(psc->base.configs);
1272   psc->base.configs = configs;
1273   glx_config_destroy_list(psc->base.visuals);
1274   psc->base.visuals = visuals;
1275
1276   psc->driver_configs = driver_configs;
1277
1278   psc->base.vtable = &dri2_screen_vtable;
1279   psp = &psc->vtable;
1280   psc->base.driScreen = psp;
1281   psp->destroyScreen = dri2DestroyScreen;
1282   psp->createDrawable = dri2CreateDrawable;
1283   psp->swapBuffers = dri2SwapBuffers;
1284   psp->getDrawableMSC = NULL;
1285   psp->waitForMSC = NULL;
1286   psp->waitForSBC = NULL;
1287   psp->setSwapInterval = NULL;
1288   psp->getSwapInterval = NULL;
1289   psp->getBufferAge = NULL;
1290
1291   if (pdp->driMinor >= 2) {
1292      psp->getDrawableMSC = dri2DrawableGetMSC;
1293      psp->waitForMSC = dri2WaitForMSC;
1294      psp->waitForSBC = dri2WaitForSBC;
1295      psp->setSwapInterval = dri2SetSwapInterval;
1296      psp->getSwapInterval = dri2GetSwapInterval;
1297      __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1298   }
1299
1300   /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1301    * available.*/
1302   psp->copySubBuffer = dri2CopySubBuffer;
1303   __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1304
1305   free(driverName);
1306   free(deviceName);
1307
1308   tmp = getenv("LIBGL_SHOW_FPS");
1309   psc->show_fps_interval = (tmp) ? atoi(tmp) : 0;
1310   if (psc->show_fps_interval < 0)
1311      psc->show_fps_interval = 0;
1312
1313   return &psc->base;
1314
1315handle_error:
1316   CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1317
1318   if (configs)
1319       glx_config_destroy_list(configs);
1320   if (visuals)
1321       glx_config_destroy_list(visuals);
1322   if (psc->driScreen)
1323       psc->core->destroyScreen(psc->driScreen);
1324   psc->driScreen = NULL;
1325   if (psc->fd >= 0)
1326      close(psc->fd);
1327   if (psc->driver)
1328      dlclose(psc->driver);
1329
1330   free(driverName);
1331   free(deviceName);
1332   glx_screen_cleanup(&psc->base);
1333   free(psc);
1334
1335   return NULL;
1336}
1337
1338/* Called from __glXFreeDisplayPrivate.
1339 */
1340static void
1341dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1342{
1343   struct dri2_display *pdp = (struct dri2_display *) dpy;
1344
1345   __glxHashDestroy(pdp->dri2Hash);
1346   free(dpy);
1347}
1348
1349_X_HIDDEN __GLXDRIdrawable *
1350dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1351{
1352   struct glx_display *d = __glXInitialize(dpy);
1353   struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1354   __GLXDRIdrawable *pdraw;
1355
1356   if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1357      return pdraw;
1358
1359   return NULL;
1360}
1361
1362/*
1363 * Allocate, initialize and return a __DRIdisplayPrivate object.
1364 * This is called from __glXInitialize() when we are given a new
1365 * display pointer.
1366 */
1367_X_HIDDEN __GLXDRIdisplay *
1368dri2CreateDisplay(Display * dpy)
1369{
1370   struct dri2_display *pdp;
1371   int eventBase, errorBase, i;
1372
1373   if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1374      return NULL;
1375
1376   pdp = malloc(sizeof *pdp);
1377   if (pdp == NULL)
1378      return NULL;
1379
1380   if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1381      free(pdp);
1382      return NULL;
1383   }
1384
1385   pdp->driPatch = 0;
1386   pdp->swapAvailable = (pdp->driMinor >= 2);
1387   pdp->invalidateAvailable = (pdp->driMinor >= 3);
1388
1389   pdp->base.destroyDisplay = dri2DestroyDisplay;
1390   pdp->base.createScreen = dri2CreateScreen;
1391
1392   i = 0;
1393   if (pdp->driMinor < 1)
1394      pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1395   else
1396      pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1397
1398   pdp->loader_extensions[i++] = &systemTimeExtension.base;
1399
1400   pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1401
1402   pdp->loader_extensions[i++] = NULL;
1403
1404   pdp->dri2Hash = __glxHashCreate();
1405   if (pdp->dri2Hash == NULL) {
1406      free(pdp);
1407      return NULL;
1408   }
1409
1410   return &pdp->base;
1411}
1412
1413#endif /* GLX_DIRECT_RENDERING */
1414