summaryrefslogtreecommitdiff
path: root/src/egl/drivers/xdri/egl_xdri.c
blob: 9ff71588dff3329cb644596092ded6fb565e238b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
/**************************************************************************
 * 
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/


/**
 * Code to interface a DRI driver to libEGL.
 * Note that unlike previous DRI/EGL interfaces, this one is meant to
 * be used _with_ X.  Applications will use eglCreateWindowSurface()
 * to render into X-created windows.
 *
 * This is an EGL driver that, in turn, loads a regular DRI driver.
 * There are some dependencies on code in libGL, but those could be
 * removed with some effort.
 *
 * Authors: Brian Paul
 */


#include <assert.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "dlfcn.h"
#include <X11/Xlib.h>
#include <GL/gl.h>
#include "xf86dri.h"
#include "glxclient.h"
#include "dri_util.h"
#include "drm_sarea.h"

#define _EGL_PLATFORM_X

#include "eglconfig.h"
#include "eglcontext.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "eglglobals.h"
#include "eglhash.h"
#include "egllog.h"
#include "eglsurface.h"

#include <GL/gl.h>

typedef void (*glGetIntegerv_t)(GLenum, GLint *);
typedef void (*glBindTexture_t)(GLenum, GLuint);
typedef void (*glCopyTexImage2D_t)(GLenum, GLint, GLenum, GLint, GLint,
                                   GLint, GLint, GLint);


#define CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))


/** subclass of _EGLDriver */
struct xdri_egl_driver
{
   _EGLDriver Base;   /**< base class */

   const char *dri_driver_name;  /**< name of DRI driver to load */
   void *dri_driver_handle;      /**< returned by dlopen(dri_driver_name) */

   __GLXdisplayPrivate *glx_priv;


   /* XXX we're not actually using these at this time: */
   int chipset;
   int minor;
   int drmFD;

   __DRIframebuffer framebuffer;
   drm_handle_t hSAREA;
   drmAddress pSAREA;
   char *busID;
   drm_magic_t magic;
};


/** subclass of _EGLContext */
struct xdri_egl_context
{
   _EGLContext Base;   /**< base class */

   __DRIcontext driContext;

   GLint bound_tex_object;
};


/** subclass of _EGLSurface */
struct xdri_egl_surface
{
   _EGLSurface Base;   /**< base class */

   __DRIid driDrawable;  /**< DRI surface */
   drm_drawable_t hDrawable;
};


/** subclass of _EGLConfig */
struct xdri_egl_config
{
   _EGLConfig Base;   /**< base class */

   const __GLcontextModes *mode;  /**< corresponding GLX mode */
};



/** cast wrapper */
static struct xdri_egl_driver *
xdri_egl_driver(_EGLDriver *drv)
{
   return (struct xdri_egl_driver *) drv;
}


/** Map EGLSurface handle to xdri_egl_surface object */
static struct xdri_egl_surface *
lookup_surface(EGLSurface surf)
{
   _EGLSurface *surface = _eglLookupSurface(surf);
   return (struct xdri_egl_surface *) surface;
}


/** Map EGLContext handle to xdri_egl_context object */
static struct xdri_egl_context *
lookup_context(EGLContext c)
{
   _EGLContext *context = _eglLookupContext(c);
   return (struct xdri_egl_context *) context;
}

static struct xdri_egl_context *
current_context(void)
{
   return (struct xdri_egl_context *) _eglGetCurrentContext();
}

/** Map EGLConfig handle to xdri_egl_config object */
static struct xdri_egl_config *
lookup_config(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config)
{
   _EGLConfig *conf = _eglLookupConfig(drv, dpy, config);
   return (struct xdri_egl_config *) conf;
}



/** Get size of given window */
static Status
get_drawable_size(Display *dpy, Drawable d, uint *width, uint *height)
{
   Window root;
   Status stat;
   int xpos, ypos;
   unsigned int w, h, bw, depth;
   stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
   *width = w;
   *height = h;
   return stat;
}


/**
 * Produce a set of EGL configs.
 * Note that we get the list of GLcontextModes from the GLX library.
 * This dependency on GLX lib will be removed someday.
 */
static void
create_configs(_EGLDisplay *disp, __GLXdisplayPrivate *glx_priv)
{
   static const EGLint all_apis = (EGL_OPENGL_ES_BIT |
                                   EGL_OPENGL_ES2_BIT |
                                   EGL_OPENVG_BIT |
                                   EGL_OPENGL_BIT);
   __GLXscreenConfigs *scrn = glx_priv->screenConfigs;
   const __GLcontextModes *m;
   int id = 1;

   for (m = scrn->configs; m; m = m->next) {
      /* EGL requires double-buffered configs */
      if (m->doubleBufferMode) {
         struct xdri_egl_config *config = CALLOC_STRUCT(xdri_egl_config);

         _eglInitConfig(&config->Base, id++);

         SET_CONFIG_ATTRIB(&config->Base, EGL_BUFFER_SIZE, m->rgbBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_RED_SIZE, m->redBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_GREEN_SIZE, m->greenBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_BLUE_SIZE, m->blueBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_ALPHA_SIZE, m->alphaBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_DEPTH_SIZE, m->depthBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_STENCIL_SIZE, m->stencilBits);
         SET_CONFIG_ATTRIB(&config->Base, EGL_SAMPLES, m->samples);
         SET_CONFIG_ATTRIB(&config->Base, EGL_SAMPLE_BUFFERS, m->sampleBuffers);
         SET_CONFIG_ATTRIB(&config->Base, EGL_NATIVE_VISUAL_ID, m->visualID);
         SET_CONFIG_ATTRIB(&config->Base, EGL_NATIVE_VISUAL_TYPE, m->visualType);
         SET_CONFIG_ATTRIB(&config->Base, EGL_CONFORMANT, all_apis);
         SET_CONFIG_ATTRIB(&config->Base, EGL_RENDERABLE_TYPE, all_apis);
         /* XXX only window rendering allowed ATM */
         SET_CONFIG_ATTRIB(&config->Base, EGL_SURFACE_TYPE,
                           (EGL_WINDOW_BIT | EGL_PBUFFER_BIT));

         /* XXX possibly other things to init... */

         /* Ptr from EGL config to GLcontextMode.  Used in CreateContext(). */
         config->mode = m;

         _eglAddConfig(disp, &config->Base);
      }
   }
}


/**
 * Called via __DRIinterfaceMethods object
 */
static __DRIfuncPtr
dri_get_proc_address(const char * proc_name)
{
   return NULL;
}


static void
dri_context_modes_destroy(__GLcontextModes *modes)
{
   _eglLog(_EGL_DEBUG, "%s", __FUNCTION__);

   while (modes) {
      __GLcontextModes * const next = modes->next;
      free(modes);
      modes = next;
   }
}


/**
 * Create a linked list of 'count' GLcontextModes.
 * These are used during the client/server visual negotiation phase,
 * then discarded.
 */
static __GLcontextModes *
dri_context_modes_create(unsigned count, size_t minimum_size)
{
   /* This code copied from libGLX, and modified */
   const size_t size = (minimum_size > sizeof(__GLcontextModes))
       ? minimum_size : sizeof(__GLcontextModes);
   __GLcontextModes * head = NULL;
   __GLcontextModes ** next;
   unsigned   i;

   next = & head;
   for (i = 0 ; i < count ; i++) {
      *next = (__GLcontextModes *) calloc(1, size);
      if (*next == NULL) {
	 dri_context_modes_destroy(head);
	 head = NULL;
	 break;
      }
      
      (*next)->doubleBufferMode = 1;
      (*next)->visualID = GLX_DONT_CARE;
      (*next)->visualType = GLX_DONT_CARE;
      (*next)->visualRating = GLX_NONE;
      (*next)->transparentPixel = GLX_NONE;
      (*next)->transparentRed = GLX_DONT_CARE;
      (*next)->transparentGreen = GLX_DONT_CARE;
      (*next)->transparentBlue = GLX_DONT_CARE;
      (*next)->transparentAlpha = GLX_DONT_CARE;
      (*next)->transparentIndex = GLX_DONT_CARE;
      (*next)->xRenderable = GLX_DONT_CARE;
      (*next)->fbconfigID = GLX_DONT_CARE;
      (*next)->swapMethod = GLX_SWAP_UNDEFINED_OML;
      (*next)->bindToTextureRgb = GLX_DONT_CARE;
      (*next)->bindToTextureRgba = GLX_DONT_CARE;
      (*next)->bindToMipmapTexture = GLX_DONT_CARE;
      (*next)->bindToTextureTargets = 0;
      (*next)->yInverted = GLX_DONT_CARE;

      next = & ((*next)->next);
   }

   return head;
}


static __DRIscreen *
dri_find_dri_screen(__DRInativeDisplay *ndpy, int scrn)
{
   __GLXdisplayPrivate *priv = __glXInitialize(ndpy);
   __GLXscreenConfigs *scrnConf = priv->screenConfigs;
   return &scrnConf->driScreen;
}


static GLboolean
dri_window_exists(__DRInativeDisplay *ndpy, __DRIid draw)
{
   return EGL_TRUE;
}


static GLboolean
dri_create_context(__DRInativeDisplay *ndpy, int screenNum, int configID,
                   void * contextID, drm_context_t * hw_context)
{
   assert(configID >= 0);
   return XF86DRICreateContextWithConfig(ndpy, screenNum,
                                         configID, contextID, hw_context);
}


static GLboolean
dri_destroy_context(__DRInativeDisplay * ndpy, int screen, __DRIid context)
{
   return XF86DRIDestroyContext(ndpy, screen, context);
}


static GLboolean
dri_create_drawable(__DRInativeDisplay * ndpy, int screen,
                    __DRIid drawable, drm_drawable_t * hHWDrawable)
{
   _eglLog(_EGL_DEBUG, "XDRI: %s", __FUNCTION__);

   /* Create DRI drawable for given window ID (drawable) */
   if (!XF86DRICreateDrawable(ndpy, screen, drawable, hHWDrawable))
      return EGL_FALSE;

   return EGL_TRUE;
}


static GLboolean
dri_destroy_drawable(__DRInativeDisplay * ndpy, int screen, __DRIid drawable)
{
   _eglLog(_EGL_DEBUG, "XDRI: %s", __FUNCTION__);
   return XF86DRIDestroyDrawable(ndpy, screen, drawable);
}


static GLboolean
dri_get_drawable_info(__DRInativeDisplay *ndpy, int scrn,
                      __DRIid draw, unsigned int * index, unsigned int * stamp,
                      int * x, int * y, int * width, int * height,
                      int * numClipRects, drm_clip_rect_t ** pClipRects,
                      int * backX, int * backY,
                      int * numBackClipRects,
                      drm_clip_rect_t ** pBackClipRects)
{
   _eglLog(_EGL_DEBUG, "XDRI: %s", __FUNCTION__);

   if (!XF86DRIGetDrawableInfo(ndpy, scrn, draw, index, stamp,
                               x, y, width, height,
                               numClipRects, pClipRects,
                               backX, backY,
                               numBackClipRects, pBackClipRects)) {
      return EGL_FALSE;
   }

   return EGL_TRUE;
}


/**
 * Table of functions exported by the loader to the driver.
 */
static const __DRIinterfaceMethods interface_methods = {
   dri_get_proc_address,

   dri_context_modes_create,
   dri_context_modes_destroy,

   dri_find_dri_screen,
   dri_window_exists,

   dri_create_context,
   dri_destroy_context,

   dri_create_drawable,
   dri_destroy_drawable,
   dri_get_drawable_info,

   NULL,/*__eglGetUST,*/
   NULL,/*__eglGetMSCRate,*/
};



static EGLBoolean
init_drm(struct xdri_egl_driver *xdri_drv, _EGLDisplay *disp)
{
   __DRIversion ddx_version;
   __DRIversion dri_version;
   __DRIversion drm_version;
   drmVersionPtr version;
   drm_handle_t  hFB;
   int newlyopened;
   int status;
   int scrn = DefaultScreen(disp->Xdpy);

#if 0
   createNewScreen = (PFNCREATENEWSCREENFUNC)
      dlsym(xdri_drv->dri_driver_handle, createNewScreenName);
   if (!createNewScreen) {
      _eglLog(_EGL_WARNING, "XDRI: Couldn't find %s function in the driver.",
              createNewScreenName);
      return EGL_FALSE;
   }
   else {
      _eglLog(_EGL_DEBUG, "XDRI: Found %s", createNewScreenName);
   }
#endif

   /*
    * Get the DRI X extension version.
    */
   dri_version.major = 4;
   dri_version.minor = 0;
   dri_version.patch = 0;

   if (!XF86DRIOpenConnection(disp->Xdpy, scrn,
                              &xdri_drv->hSAREA, &xdri_drv->busID)) {
      _eglLog(_EGL_WARNING, "XF86DRIOpenConnection failed");
   }

   xdri_drv->drmFD = drmOpenOnce(NULL, xdri_drv->busID, &newlyopened);
   if (xdri_drv->drmFD < 0) {
      perror("drmOpenOnce failed: ");
      return EGL_FALSE;
   }
   else {
      _eglLog(_EGL_DEBUG, "XDRI: drmOpenOnce returned %d", xdri_drv->drmFD);
   }


   if (drmGetMagic(xdri_drv->drmFD, &xdri_drv->magic)) {
      perror("drmGetMagic failed: ");
      return EGL_FALSE;
   }

   version = drmGetVersion(xdri_drv->drmFD);
   if (version) {
      drm_version.major = version->version_major;
      drm_version.minor = version->version_minor;
      drm_version.patch = version->version_patchlevel;
      drmFreeVersion(version);
      _eglLog(_EGL_DEBUG, "XDRI: Got DRM version %d.%d.%d",
              drm_version.major,
              drm_version.minor,
              drm_version.patch);
   }
   else {
      drm_version.major = -1;
      drm_version.minor = -1;
      drm_version.patch = -1;
      _eglLog(_EGL_WARNING, "XDRI: drmGetVersion() failed");
      return EGL_FALSE;
   }

   /* Authenticate w/ server.
    */
   if (!XF86DRIAuthConnection(disp->Xdpy, scrn, xdri_drv->magic)) {
      _eglLog(_EGL_WARNING, "XDRI: XF86DRIAuthConnection() failed");
      return EGL_FALSE;
   }
   else {
      _eglLog(_EGL_DEBUG, "XDRI: XF86DRIAuthConnection() success");
   }

   /* Get ddx version.
    */
   {
      char *driverName;

      /*
       * Get device name (like "tdfx") and the ddx version
       * numbers.  We'll check the version in each DRI driver's
       * "createNewScreen" function.
       */
      if (!XF86DRIGetClientDriverName(disp->Xdpy, scrn,
                                     &ddx_version.major,
                                     &ddx_version.minor,
                                     &ddx_version.patch,
                                     &driverName)) {
         _eglLog(_EGL_WARNING, "XDRI: XF86DRIGetClientDriverName failed");
         return EGL_FALSE;
      }
      else {
         _eglLog(_EGL_DEBUG, "XDRI: XF86DRIGetClientDriverName returned %s", driverName);
      }
   }

   /* Get framebuffer info.
    */
   {
      int junk;
      if (!XF86DRIGetDeviceInfo(disp->Xdpy, scrn,
                                &hFB,
                                &junk,
                                &xdri_drv->framebuffer.size,
                                &xdri_drv->framebuffer.stride,
                                &xdri_drv->framebuffer.dev_priv_size,
                                &xdri_drv->framebuffer.dev_priv)) {
         _eglLog(_EGL_WARNING, "XDRI: XF86DRIGetDeviceInfo() failed");
         return EGL_FALSE;
      }
      else {
         _eglLog(_EGL_DEBUG, "XDRI: XF86DRIGetDeviceInfo() success");
      }
      xdri_drv->framebuffer.width = DisplayWidth(disp->Xdpy, scrn);
      xdri_drv->framebuffer.height = DisplayHeight(disp->Xdpy, scrn);
   }

   /* Map the framebuffer region. (this may not be needed)
    */
   status = drmMap(xdri_drv->drmFD, hFB, xdri_drv->framebuffer.size, 
                   (drmAddressPtr) &xdri_drv->framebuffer.base);
   if (status != 0) {
      _eglLog(_EGL_WARNING, "XDRI: drmMap(framebuffer) failed");
      return EGL_FALSE;
   }
   else {
      _eglLog(_EGL_DEBUG, "XDRI: drmMap(framebuffer) success");
   }

   /* Map the SAREA region.
    */
   status = drmMap(xdri_drv->drmFD, xdri_drv->hSAREA, SAREA_MAX, &xdri_drv->pSAREA);
   if (status != 0) {
      _eglLog(_EGL_WARNING, "XDRI: drmMap(sarea) failed");
      return EGL_FALSE;
   }
   else {
      _eglLog(_EGL_DEBUG, "XDRI: drmMap(sarea) success");
   }

   return EGL_TRUE;
}


/**
 * Load the DRI driver named by "xdri_drv->dri_driver_name".
 * Basically, dlopen() the library to set "xdri_drv->dri_driver_handle".
 *
 * Later, we'll call dlsym(createNewScreenName) to get a pointer to
 * the driver's createNewScreen() function which is the bootstrap function.
 *
 * \return EGL_TRUE for success, EGL_FALSE for failure
 */
static EGLBoolean
load_dri_driver(struct xdri_egl_driver *xdri_drv)
{
   char filename[100];
   int flags = RTLD_NOW;

   /* try "egl_xxx_dri.so" first */
   snprintf(filename, sizeof(filename), "egl_%s.so", xdri_drv->dri_driver_name);
   _eglLog(_EGL_DEBUG, "XDRI: dlopen(%s)", filename);
   xdri_drv->dri_driver_handle = dlopen(filename, flags);
   if (xdri_drv->dri_driver_handle) {
      _eglLog(_EGL_DEBUG, "XDRI: dlopen(%s) OK", filename);
      return EGL_TRUE;
   }
   else {
      _eglLog(_EGL_DEBUG, "XDRI: dlopen(%s) fail (%s)", filename, dlerror());
   }

   /* try regular "xxx_dri.so" next */
   snprintf(filename, sizeof(filename), "%s.so", xdri_drv->dri_driver_name);
   _eglLog(_EGL_DEBUG, "XDRI: dlopen(%s)", filename);
   xdri_drv->dri_driver_handle = dlopen(filename, flags);
   if (xdri_drv->dri_driver_handle) {
      _eglLog(_EGL_DEBUG, "XDRI: dlopen(%s) OK", filename);
      return EGL_TRUE;
   }

   _eglLog(_EGL_WARNING, "XDRI Could not open %s (%s)", filename, dlerror());
   return EGL_FALSE;
}


/**
 * Called via eglInitialize(), xdri_drv->API.Initialize().
 */
static EGLBoolean
xdri_eglInitialize(_EGLDriver *drv, EGLDisplay dpy,
                   EGLint *minor, EGLint *major)
{
   struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   static char name[100];

   _eglLog(_EGL_DEBUG, "XDRI: eglInitialize");

   if (!disp->Xdpy) {
      disp->Xdpy = XOpenDisplay(NULL);
      if (!disp->Xdpy) {
         _eglLog(_EGL_WARNING, "XDRI: XOpenDisplay failed");
         return EGL_FALSE;
      }
   }

#if 0
   /* choose the DRI driver to load */
   xdri_drv->dri_driver_name = _eglChooseDRMDriver(0);
   if (!load_dri_driver(xdri_drv))
      return EGL_FALSE;
#else
   (void) load_dri_driver;
#endif

#if 0
   if (!init_drm(xdri_drv, disp))
      return EGL_FALSE;
#else
   (void) init_drm;
#endif

   /*
    * NOTE: this call to __glXInitialize() bootstraps the whole GLX/DRI
    * interface, loads the DRI driver, etc.
    * This replaces the load_dri_driver()  and init_drm() code above.
    */
   xdri_drv->glx_priv = __glXInitialize(disp->Xdpy);

   create_configs(disp, xdri_drv->glx_priv);

   xdri_drv->Base.Initialized = EGL_TRUE;

   snprintf(name, sizeof(name), "X/DRI:%s", xdri_drv->dri_driver_name);
   xdri_drv->Base.Name = name;

   /* we're supporting EGL 1.4 */
   *minor = 1;
   *major = 4;

   return EGL_TRUE;
}


/*
 * Do some clean-up that normally occurs in XCloseDisplay().
 * We do this here because we're about to unload a dynamic library
 * that has added some per-display extension data and callbacks.
 * If we don't do this here we'll crash in XCloseDisplay() because it'll
 * try to call functions that went away when the driver library was unloaded.
 */
static void
FreeDisplayExt(Display *dpy)
{
   _XExtension *ext, *next;

   for (ext = dpy->ext_procs; ext; ext = next) {
      next = ext->next;
      if (ext->close_display) {
         ext->close_display(dpy, &ext->codes);
         ext->close_display = NULL;
      }
      if (ext->name)
         Xfree(ext->name);
      Xfree(ext);
   }
   dpy->ext_procs = NULL;

   _XFreeExtData (dpy->ext_data);
   dpy->ext_data = NULL;
}


/**
 * Called via eglTerminate(), drv->API.Terminate().
 */
static EGLBoolean
xdri_eglTerminate(_EGLDriver *drv, EGLDisplay dpy)
{
   struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
   _EGLDisplay *disp = _eglLookupDisplay(dpy);

   _eglLog(_EGL_DEBUG, "XDRI: eglTerminate");

   _eglLog(_EGL_DEBUG, "XDRI: Closing %s", xdri_drv->dri_driver_name);

   FreeDisplayExt(disp->Xdpy);

#if 0
   /* this causes a segfault for some reason */
   dlclose(xdri_drv->dri_driver_handle);
#endif
   xdri_drv->dri_driver_handle = NULL;

   free((void*) xdri_drv->dri_driver_name);

   return EGL_TRUE;
}


/*
 * Called from eglGetProcAddress() via drv->API.GetProcAddress().
 */
static _EGLProc
xdri_eglGetProcAddress(const char *procname)
{
#if 0
   _EGLDriver *drv = NULL;

   struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
   /*_EGLDisplay *disp = _eglLookupDisplay(dpy);*/
   _EGLProc *proc = xdri_drv->driScreen.getProcAddress(procname);
   return proc;
#elif 1
   /* This is a bit of a hack to get at the gallium/Mesa state tracker
    * function st_get_proc_address().  This will probably change at
    * some point.
    */
   _EGLProc (*st_get_proc_addr)(const char *procname);
   st_get_proc_addr = dlsym(NULL, "st_get_proc_address");
   if (st_get_proc_addr) {
      return st_get_proc_addr(procname);
   }
   return NULL;   
#else
   return NULL;
#endif
}


/**
 * Called via eglCreateContext(), drv->API.CreateContext().
 */
static EGLContext
xdri_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
                      EGLContext share_list, const EGLint *attrib_list)
{
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   struct xdri_egl_config *xdri_config = lookup_config(drv, dpy, config);
   void *shared = NULL;
   int renderType = GLX_RGBA_BIT;

   struct xdri_egl_context *xdri_ctx = CALLOC_STRUCT(xdri_egl_context);
   if (!xdri_ctx)
      return EGL_NO_CONTEXT;

   if (!_eglInitContext(drv, dpy, &xdri_ctx->Base, config, attrib_list)) {
      free(xdri_ctx);
      return EGL_NO_CONTEXT;
   }

   assert(xdri_config);

   {
      struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
      __GLXscreenConfigs *scrnConf = xdri_drv->glx_priv->screenConfigs;
      xdri_ctx->driContext.private = 
         scrnConf->driScreen.createNewContext(disp->Xdpy,
                                              xdri_config->mode, renderType,
                                              shared, &xdri_ctx->driContext);
   }

   if (!xdri_ctx->driContext.private) {
      _eglLog(_EGL_DEBUG, "driScreen.createNewContext failed");
      free(xdri_ctx);
      return EGL_NO_CONTEXT;
   }

   xdri_ctx->driContext.mode = xdri_config->mode;

   return _eglGetContextHandle(&xdri_ctx->Base);
}


/**
 * Called via eglMakeCurrent(), drv->API.MakeCurrent().
 */
static EGLBoolean
xdri_eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
                    EGLSurface r, EGLContext context)
{
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   struct xdri_egl_context *xdri_ctx = lookup_context(context);
   struct xdri_egl_surface *xdri_draw = lookup_surface(d);
   struct xdri_egl_surface *xdri_read = lookup_surface(r);
   __DRIid draw = xdri_draw ? xdri_draw->driDrawable : 0;
   __DRIid read = xdri_read ? xdri_read->driDrawable : 0;
   int scrn = DefaultScreen(disp->Xdpy);

   if (!_eglMakeCurrent(drv, dpy, d, r, context))
      return EGL_FALSE;


   if (xdri_ctx &&
       !xdri_ctx->driContext.bindContext(disp->Xdpy, scrn, draw, read,
                                         &xdri_ctx->driContext)) {
      return EGL_FALSE;
   }

   return EGL_TRUE;
}


/**
 * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 */
static EGLSurface
xdri_eglCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
                            NativeWindowType window, const EGLint *attrib_list)
{
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   struct xdri_egl_surface *xdri_surf;
   int scrn = DefaultScreen(disp->Xdpy);
   uint width, height;

   xdri_surf = CALLOC_STRUCT(xdri_egl_surface);
   if (!xdri_surf)
      return EGL_NO_SURFACE;

   if (!_eglInitSurface(drv, dpy, &xdri_surf->Base, EGL_WINDOW_BIT,
                        config, attrib_list)) {
      free(xdri_surf);
      return EGL_FALSE;
   }

   if (!XF86DRICreateDrawable(disp->Xdpy, scrn, window, &xdri_surf->hDrawable)) {
      free(xdri_surf);
      return EGL_FALSE;
   }

   xdri_surf->driDrawable = window;

   _eglSaveSurface(&xdri_surf->Base);

   get_drawable_size(disp->Xdpy, window, &width, &height);
   xdri_surf->Base.Width = width;
   xdri_surf->Base.Height = height;

   _eglLog(_EGL_DEBUG,
           "XDRI: CreateWindowSurface win 0x%x  handle %d  hDrawable %d",
           (int) window, _eglGetSurfaceHandle(&xdri_surf->Base),
           (int) xdri_surf->hDrawable);

   return _eglGetSurfaceHandle(&xdri_surf->Base);
}


/**
 * Called via eglCreatePbufferSurface(), drv->API.CreatePbufferSurface().
 */
static EGLSurface
xdri_eglCreatePbufferSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
                             const EGLint *attrib_list)
{
   _EGLDisplay *disp = _eglLookupDisplay(dpy);
   struct xdri_egl_surface *xdri_surf;
   struct xdri_egl_config *xdri_config = lookup_config(drv, dpy, config);
   int scrn = DefaultScreen(disp->Xdpy);
   Window window;

   xdri_surf = CALLOC_STRUCT(xdri_egl_surface);
   if (!xdri_surf)
      return EGL_NO_SURFACE;

   if (!_eglInitSurface(drv, dpy, &xdri_surf->Base, EGL_PBUFFER_BIT,
                        config, attrib_list)) {
      free(xdri_surf);
      return EGL_FALSE;
   }

   /* Create a dummy X window */
   {
      Window root = RootWindow(disp->Xdpy, scrn);
      XSetWindowAttributes attr;
      XVisualInfo *visInfo, visTemplate;
      unsigned mask;
      int nvis;

      visTemplate.visualid = xdri_config->mode->visualID;
      visInfo = XGetVisualInfo(disp->Xdpy, VisualIDMask, &visTemplate, &nvis);
      if (!visInfo) {
         return EGL_NO_SURFACE;
      }

      attr.background_pixel = 0;
      attr.border_pixel = 0;
      attr.colormap = XCreateColormap(disp->Xdpy, root,
                                      visInfo->visual, AllocNone);
      attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
      mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
      
      window = XCreateWindow(disp->Xdpy, root, 0, 0,
                             xdri_surf->Base.Width, xdri_surf->Base.Height,
                             0, visInfo->depth, InputOutput,
                             visInfo->visual, mask, &attr);

      /*XMapWindow(disp->Xdpy, window);*/
      XFree(visInfo);

      /* set hints and properties */
      /*
      sizehints.width = xdri_surf->Base.Width;
      sizehints.height = xdri_surf->Base.Height;
      sizehints.flags = USPosition;
      XSetNormalHints(disp->Xdpy, window, &sizehints);
      */
   }

   if (!XF86DRICreateDrawable(disp->Xdpy, scrn, window, &xdri_surf->hDrawable)) {
      free(xdri_surf);
      return EGL_FALSE;
   }

   xdri_surf->driDrawable = window;

   _eglSaveSurface(&xdri_surf->Base);

   _eglLog(_EGL_DEBUG,
           "XDRI: CreatePbufferSurface handle %d  hDrawable %d",
           _eglGetSurfaceHandle(&xdri_surf->Base),
           (int) xdri_surf->hDrawable);

   return _eglGetSurfaceHandle(&xdri_surf->Base);
}



static EGLBoolean
xdri_eglDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
{
   struct xdri_egl_surface *xdri_surf = lookup_surface(surface);
   if (xdri_surf) {
      _eglHashRemove(_eglGlobal.Surfaces, (EGLuint) surface);
      if (xdri_surf->Base.IsBound) {
         xdri_surf->Base.DeletePending = EGL_TRUE;
      }
      else {
         /*
         st_unreference_framebuffer(&surf->Framebuffer);
         */
         free(xdri_surf);
      }
      return EGL_TRUE;
   }
   else {
      _eglError(EGL_BAD_SURFACE, "eglDestroySurface");
      return EGL_FALSE;
   }
}


static EGLBoolean
xdri_eglBindTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
                     EGLint buffer)
{
   typedef int (*bind_teximage)(__DRInativeDisplay *dpy,
                                __DRIid surface, __DRIscreen *psc,
                                int buffer, int target, int format,
                                int level, int mipmap);

   bind_teximage egl_dri_bind_teximage;

   _EGLDisplay *disp = _eglLookupDisplay(dpy);

   struct xdri_egl_context *xdri_ctx = current_context();
   struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
   struct xdri_egl_surface *xdri_surf = lookup_surface(surface);

   __DRIid dri_surf = xdri_surf ? xdri_surf->driDrawable : 0;

   __GLXscreenConfigs *scrnConf = xdri_drv->glx_priv->screenConfigs;
   __DRIscreen *psc = &scrnConf->driScreen;

   /* this call just does error checking */
   if (!_eglBindTexImage(drv, dpy, surface, buffer)) {
      return EGL_FALSE;
   }

   egl_dri_bind_teximage =
      (bind_teximage) dlsym(NULL, "egl_dri_bind_teximage");
   if (egl_dri_bind_teximage) {
      return egl_dri_bind_teximage(disp->Xdpy, dri_surf, psc,
                                   buffer,
                                   xdri_surf->Base.TextureTarget,
                                   xdri_surf->Base.TextureFormat,
                                   xdri_surf->Base.MipmapLevel,
                                   xdri_surf->Base.MipmapTexture);
   }
   else {
      /* fallback path based on glCopyTexImage() */
      /* Get/save currently bound 2D texobj name */
      glGetIntegerv_t glGetIntegerv_func = 
         (glGetIntegerv_t) dlsym(NULL, "glGetIntegerv");
      GLint curTexObj = 0;
      if (glGetIntegerv_func) {
         (*glGetIntegerv_func)(GL_TEXTURE_BINDING_2D, &curTexObj);
      }
      xdri_ctx->bound_tex_object = curTexObj;
   }

   return EGL_FALSE;
}


static EGLBoolean
xdri_eglReleaseTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
                        EGLint buffer)
{
   typedef int (*release_teximage)(__DRInativeDisplay *dpy,
                                   __DRIid surface, __DRIscreen *psc,
                                   int buffer, int target, int format,
                                   int level, int mipmap);
   release_teximage egl_dri_release_teximage;

   _EGLDisplay *disp = _eglLookupDisplay(dpy);

   struct xdri_egl_context *xdri_ctx = current_context();
   struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
   struct xdri_egl_surface *xdri_surf = lookup_surface(surface);

   __DRIid dri_surf = xdri_surf ? xdri_surf->driDrawable : 0;

   __GLXscreenConfigs *scrnConf = xdri_drv->glx_priv->screenConfigs;
   __DRIscreen *psc = &scrnConf->driScreen;

   /* this call just does error checking */
   if (!_eglReleaseTexImage(drv, dpy, surface, buffer)) {
      return EGL_FALSE;
   }

   egl_dri_release_teximage =
      (release_teximage) dlsym(NULL, "egl_dri_release_teximage");
   if (egl_dri_release_teximage) {
      return egl_dri_release_teximage(disp->Xdpy, dri_surf, psc,
                                      buffer,
                                      xdri_surf->Base.TextureTarget,
                                      xdri_surf->Base.TextureFormat,
                                      xdri_surf->Base.MipmapLevel,
                                      xdri_surf->Base.MipmapTexture);
   }
   else {
      /* fallback path based on glCopyTexImage() */
      glGetIntegerv_t glGetIntegerv_func = 
         (glGetIntegerv_t) dlsym(NULL, "glGetIntegerv");
      glBindTexture_t glBindTexture_func = 
         (glBindTexture_t) dlsym(NULL, "glBindTexture");
      glCopyTexImage2D_t glCopyTexImage2D_func = 
         (glCopyTexImage2D_t) dlsym(NULL, "glCopyTexImage2D");
      GLint curTexObj;
      GLenum intFormat;
      GLint level, width, height;

      if (xdri_surf->Base.TextureFormat == EGL_TEXTURE_RGBA)
         intFormat = GL_RGBA;
      else
         intFormat = GL_RGB;
      level = xdri_surf->Base.MipmapLevel;
      width = xdri_surf->Base.Width >> level;
      height = xdri_surf->Base.Height >> level;

      if (width > 0 && height > 0 &&
          glGetIntegerv_func && glBindTexture_func && glCopyTexImage2D_func) {
         glGetIntegerv_func(GL_TEXTURE_BINDING_2D, &curTexObj);
         /* restore texobj from time of eglBindTexImage() call */
         if (curTexObj != xdri_ctx->bound_tex_object)
            glBindTexture_func(GL_TEXTURE_2D, xdri_ctx->bound_tex_object);
         /* copy pbuffer image to texture */
         glCopyTexImage2D_func(GL_TEXTURE_2D,
                               level,
                               intFormat,
                               0, 0, width, height, 0);
         /* restore current texture */
         if (curTexObj != xdri_ctx->bound_tex_object)
            glBindTexture_func(GL_TEXTURE_2D, curTexObj);
      }
      xdri_ctx->bound_tex_object = -1;
   }

   return EGL_FALSE;
}


static EGLBoolean
xdri_eglSwapBuffers(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw)
{
   _EGLDisplay *disp = _eglLookupDisplay(dpy);

   _eglLog(_EGL_DEBUG, "XDRI: EGL SwapBuffers");

   /* error checking step: */
   if (!_eglSwapBuffers(drv, dpy, draw))
      return EGL_FALSE;

   {
      struct xdri_egl_surface *xdri_surf = lookup_surface(draw);
      struct xdri_egl_driver *xdri_drv = xdri_egl_driver(drv);
      __GLXscreenConfigs *scrnConf = xdri_drv->glx_priv->screenConfigs;
      __DRIscreen *psc = &scrnConf->driScreen;
      __DRIdrawable * const pdraw = psc->getDrawable(disp->Xdpy,
                                                     xdri_surf->driDrawable,
                                                     psc->private);

      if (pdraw)
         pdraw->swapBuffers(disp->Xdpy, pdraw->private);
      else
         _eglLog(_EGL_WARNING, "pdraw is null in SwapBuffers");
   }

   return EGL_TRUE;
}


/**
 * This is the main entrypoint into the driver, called by libEGL.
 * Create a new _EGLDriver object and init its dispatch table.
 */
_EGLDriver *
_eglMain(_EGLDisplay *disp, const char *args)
{
   struct xdri_egl_driver *xdri_drv = CALLOC_STRUCT(xdri_egl_driver);
   if (!xdri_drv)
      return NULL;

   /* Tell libGL to prefer the EGL drivers over regular DRI drivers */
   __glXPreferEGL(1);

   _eglInitDriverFallbacks(&xdri_drv->Base);
   xdri_drv->Base.API.Initialize = xdri_eglInitialize;
   xdri_drv->Base.API.Terminate = xdri_eglTerminate;

   xdri_drv->Base.API.GetProcAddress = xdri_eglGetProcAddress;

   xdri_drv->Base.API.CreateContext = xdri_eglCreateContext;
   xdri_drv->Base.API.MakeCurrent = xdri_eglMakeCurrent;
   xdri_drv->Base.API.CreateWindowSurface = xdri_eglCreateWindowSurface;
   xdri_drv->Base.API.CreatePbufferSurface = xdri_eglCreatePbufferSurface;
   xdri_drv->Base.API.DestroySurface = xdri_eglDestroySurface;
   xdri_drv->Base.API.BindTexImage = xdri_eglBindTexImage;
   xdri_drv->Base.API.ReleaseTexImage = xdri_eglReleaseTexImage;
   xdri_drv->Base.API.SwapBuffers = xdri_eglSwapBuffers;

   xdri_drv->Base.ClientAPIsMask = (EGL_OPENGL_BIT |
                                    EGL_OPENGL_ES_BIT |
                                    EGL_OPENGL_ES2_BIT |
                                    EGL_OPENVG_BIT);
   xdri_drv->Base.Name = "X/DRI";

   _eglLog(_EGL_DEBUG, "XDRI: main(%s)", args);

   return &xdri_drv->Base;
}