aboutsummaryrefslogtreecommitdiffstats
path: root/src/mesa/drivers/dri/intel/intel_context.c
blob: 3896bfa091e7faf4927c0db7c7600b13f83be05b (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
/**************************************************************************
 * 
 * Copyright 2003 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.
 * 
 **************************************************************************/


#include "main/glheader.h"
#include "main/context.h"
#include "main/extensions.h"
#include "main/framebuffer.h"
#include "main/imports.h"
#include "main/points.h"

#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "tnl/tnl.h"
#include "drivers/common/driverfuncs.h"
#include "drivers/common/meta.h"

#include "i830_dri.h"

#include "intel_chipset.h"
#include "intel_buffers.h"
#include "intel_tex.h"
#include "intel_batchbuffer.h"
#include "intel_clear.h"
#include "intel_extensions.h"
#include "intel_pixel.h"
#include "intel_regions.h"
#include "intel_buffer_objects.h"
#include "intel_fbo.h"
#include "intel_decode.h"
#include "intel_bufmgr.h"
#include "intel_screen.h"

#include "drirenderbuffer.h"
#include "utils.h"
#include "xmlpool.h"            /* for symbolic values of enum-type options */


#ifndef INTEL_DEBUG
int INTEL_DEBUG = (0);
#endif


#define DRIVER_DATE                     "20091221 DEVELOPMENT"
#define DRIVER_DATE_GEM                 "GEM " DRIVER_DATE


static const GLubyte *
intelGetString(GLcontext * ctx, GLenum name)
{
   const struct intel_context *const intel = intel_context(ctx);
   const char *chipset;
   static char buffer[128];

   switch (name) {
   case GL_VENDOR:
      return (GLubyte *) "Tungsten Graphics, Inc";
      break;

   case GL_RENDERER:
      switch (intel->intelScreen->deviceID) {
      case PCI_CHIP_845_G:
         chipset = "Intel(R) 845G";
         break;
      case PCI_CHIP_I830_M:
         chipset = "Intel(R) 830M";
         break;
      case PCI_CHIP_I855_GM:
         chipset = "Intel(R) 852GM/855GM";
         break;
      case PCI_CHIP_I865_G:
         chipset = "Intel(R) 865G";
         break;
      case PCI_CHIP_I915_G:
         chipset = "Intel(R) 915G";
         break;
      case PCI_CHIP_E7221_G:
	 chipset = "Intel (R) E7221G (i915)";
	 break;
      case PCI_CHIP_I915_GM:
         chipset = "Intel(R) 915GM";
         break;
      case PCI_CHIP_I945_G:
         chipset = "Intel(R) 945G";
         break;
      case PCI_CHIP_I945_GM:
         chipset = "Intel(R) 945GM";
         break;
      case PCI_CHIP_I945_GME:
         chipset = "Intel(R) 945GME";
         break;
      case PCI_CHIP_G33_G:
	 chipset = "Intel(R) G33";
	 break;
      case PCI_CHIP_Q35_G:
	 chipset = "Intel(R) Q35";
	 break;
      case PCI_CHIP_Q33_G:
	 chipset = "Intel(R) Q33";
	 break;
      case PCI_CHIP_IGD_GM:
      case PCI_CHIP_IGD_G:
	 chipset = "Intel(R) IGD";
	 break;
      case PCI_CHIP_I965_Q:
	 chipset = "Intel(R) 965Q";
	 break;
      case PCI_CHIP_I965_G:
      case PCI_CHIP_I965_G_1:
	 chipset = "Intel(R) 965G";
	 break;
      case PCI_CHIP_I946_GZ:
	 chipset = "Intel(R) 946GZ";
	 break;
      case PCI_CHIP_I965_GM:
	 chipset = "Intel(R) 965GM";
	 break;
      case PCI_CHIP_I965_GME:
	 chipset = "Intel(R) 965GME/GLE";
	 break;
      case PCI_CHIP_GM45_GM:
	 chipset = "Mobile Intel® GM45 Express Chipset";
	 break; 
      case PCI_CHIP_IGD_E_G:
	 chipset = "Intel(R) Integrated Graphics Device";
	 break;
      case PCI_CHIP_G45_G:
         chipset = "Intel(R) G45/G43";
         break;
      case PCI_CHIP_Q45_G:
         chipset = "Intel(R) Q45/Q43";
         break;
      case PCI_CHIP_G41_G:
         chipset = "Intel(R) G41";
         break;
      case PCI_CHIP_B43_G:
         chipset = "Intel(R) B43";
         break;
      case PCI_CHIP_ILD_G:
         chipset = "Intel(R) IGDNG_D";
         break;
      case PCI_CHIP_ILM_G:
         chipset = "Intel(R) IGDNG_M";
         break;
      default:
         chipset = "Unknown Intel Chipset";
         break;
      }

      (void) driGetRendererString(buffer, chipset, DRIVER_DATE_GEM, 0);
      return (GLubyte *) buffer;

   default:
      return NULL;
   }
}

static unsigned
intel_bits_per_pixel(const struct intel_renderbuffer *rb)
{
   return _mesa_get_format_bytes(rb->Base.Format) * 8;
}

void
intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
{
   struct gl_framebuffer *fb = drawable->driverPrivate;
   struct intel_renderbuffer *rb;
   struct intel_region *region, *depth_region;
   struct intel_context *intel = context->driverPrivate;
   struct intel_renderbuffer *front_rb, *back_rb, *depth_rb, *stencil_rb;
   __DRIbuffer *buffers = NULL;
   __DRIscreen *screen;
   int i, count;
   unsigned int attachments[10];
   uint32_t name;
   const char *region_name;

   if (INTEL_DEBUG & DEBUG_DRI)
      fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);

   screen = intel->intelScreen->driScrnPriv;

   if (screen->dri2.loader
       && (screen->dri2.loader->base.version > 2)
       && (screen->dri2.loader->getBuffersWithFormat != NULL)) {

      front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
      back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
      depth_rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
      stencil_rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);

      i = 0;
      if ((intel->is_front_buffer_rendering ||
	   intel->is_front_buffer_reading ||
	   !back_rb) && front_rb) {
	 attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
	 attachments[i++] = intel_bits_per_pixel(front_rb);
      }

      if (back_rb) {
	 attachments[i++] = __DRI_BUFFER_BACK_LEFT;
	 attachments[i++] = intel_bits_per_pixel(back_rb);
      }

      if ((depth_rb != NULL) && (stencil_rb != NULL)) {
	 attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
	 attachments[i++] = intel_bits_per_pixel(depth_rb);
      } else if (depth_rb != NULL) {
	 attachments[i++] = __DRI_BUFFER_DEPTH;
	 attachments[i++] = intel_bits_per_pixel(depth_rb);
      } else if (stencil_rb != NULL) {
	 attachments[i++] = __DRI_BUFFER_STENCIL;
	 attachments[i++] = intel_bits_per_pixel(stencil_rb);
      }

      buffers =
	 (*screen->dri2.loader->getBuffersWithFormat)(drawable,
						      &drawable->w,
						      &drawable->h,
						      attachments, i / 2,
						      &count,
						      drawable->loaderPrivate);
   } else if (screen->dri2.loader) {
      i = 0;
      if (intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT))
	 attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
      if (intel_get_renderbuffer(fb, BUFFER_BACK_LEFT))
	 attachments[i++] = __DRI_BUFFER_BACK_LEFT;
      if (intel_get_renderbuffer(fb, BUFFER_DEPTH))
	 attachments[i++] = __DRI_BUFFER_DEPTH;
      if (intel_get_renderbuffer(fb, BUFFER_STENCIL))
	 attachments[i++] = __DRI_BUFFER_STENCIL;

      buffers = (*screen->dri2.loader->getBuffers)(drawable,
						   &drawable->w,
						   &drawable->h,
						   attachments, i,
						   &count,
						   drawable->loaderPrivate);
   }

   if (buffers == NULL)
      return;

   drawable->x = 0;
   drawable->y = 0;
   drawable->backX = 0;
   drawable->backY = 0;
   drawable->numClipRects = 1;
   drawable->pClipRects[0].x1 = 0;
   drawable->pClipRects[0].y1 = 0;
   drawable->pClipRects[0].x2 = drawable->w;
   drawable->pClipRects[0].y2 = drawable->h;
   drawable->numBackClipRects = 1;
   drawable->pBackClipRects[0].x1 = 0;
   drawable->pBackClipRects[0].y1 = 0;
   drawable->pBackClipRects[0].x2 = drawable->w;
   drawable->pBackClipRects[0].y2 = drawable->h;

   depth_region = NULL;
   for (i = 0; i < count; i++) {
       switch (buffers[i].attachment) {
       case __DRI_BUFFER_FRONT_LEFT:
	   rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
	   region_name = "dri2 front buffer";
	   break;

       case __DRI_BUFFER_FAKE_FRONT_LEFT:
	   rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
	   region_name = "dri2 fake front buffer";
	   break;

       case __DRI_BUFFER_BACK_LEFT:
	   rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
	   region_name = "dri2 back buffer";
	   break;

       case __DRI_BUFFER_DEPTH:
	   rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
	   region_name = "dri2 depth buffer";
	   break;

       case __DRI_BUFFER_DEPTH_STENCIL:
	   rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
	   region_name = "dri2 depth / stencil buffer";
	   break;

       case __DRI_BUFFER_STENCIL:
	   rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
	   region_name = "dri2 stencil buffer";
	   break;

       case __DRI_BUFFER_ACCUM:
       default:
	   fprintf(stderr,
		   "unhandled buffer attach event, attacment type %d\n",
		   buffers[i].attachment);
	   return;
       }

       if (rb == NULL)
	  continue;

       if (rb->region) {
	  dri_bo_flink(rb->region->buffer, &name);
	  if (name == buffers[i].name)
	     continue;
       }

       if (INTEL_DEBUG & DEBUG_DRI)
	  fprintf(stderr,
		  "attaching buffer %d, at %d, cpp %d, pitch %d\n",
		  buffers[i].name, buffers[i].attachment,
		  buffers[i].cpp, buffers[i].pitch);
       
       if (buffers[i].attachment == __DRI_BUFFER_STENCIL && depth_region) {
	  if (INTEL_DEBUG & DEBUG_DRI)
	     fprintf(stderr, "(reusing depth buffer as stencil)\n");
	  intel_region_reference(&region, depth_region);
       }
       else
          region = intel_region_alloc_for_handle(intel, buffers[i].cpp,
						 drawable->w,
						 drawable->h,
						 buffers[i].pitch / buffers[i].cpp,
						 buffers[i].name,
						 region_name);

       if (buffers[i].attachment == __DRI_BUFFER_DEPTH)
	  depth_region = region;

       intel_renderbuffer_set_region(rb, region);
       intel_region_release(&region);

       if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) {
	  rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
	  if (rb != NULL) {
	     struct intel_region *stencil_region = NULL;

	     if (rb->region) {
		dri_bo_flink(rb->region->buffer, &name);
		if (name == buffers[i].name)
		   continue;
	     }

	     intel_region_reference(&stencil_region, region);
	     intel_renderbuffer_set_region(rb, stencil_region);
	     intel_region_release(&stencil_region);
	  }
       }
   }

   drawable->validBuffers = GL_TRUE;
   driUpdateFramebufferSize(&intel->ctx, drawable);
}

void
intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
{
    struct intel_context *intel = intel_context(ctx);
    __DRIcontext *driContext = intel->driContext;
    void (*old_viewport)(GLcontext *ctx, GLint x, GLint y,
			 GLsizei w, GLsizei h);

    if (!intel->meta.internal_viewport_call && ctx->DrawBuffer->Name == 0) {
       /* If we're rendering to the fake front buffer, make sure all the pending
	* drawing has landed on the real front buffer.  Otherwise when we
	* eventually get to DRI2GetBuffersWithFormat the stale real front
	* buffer contents will get copied to the new fake front buffer.
	*/
       if (intel->is_front_buffer_rendering) {
	  intel_flush(ctx, GL_FALSE);
       }

       intel_update_renderbuffers(driContext, driContext->driDrawablePriv);
       if (driContext->driDrawablePriv != driContext->driReadablePriv)
	  intel_update_renderbuffers(driContext, driContext->driReadablePriv);
    }

    old_viewport = ctx->Driver.Viewport;
    ctx->Driver.Viewport = NULL;
    intel->driDrawable = driContext->driDrawablePriv;
    intel_draw_buffer(ctx, intel->ctx.DrawBuffer);
    ctx->Driver.Viewport = old_viewport;
}


static const struct dri_debug_control debug_control[] = {
   { "tex",   DEBUG_TEXTURE},
   { "state", DEBUG_STATE},
   { "ioctl", DEBUG_IOCTL},
   { "blit",  DEBUG_BLIT},
   { "mip",   DEBUG_MIPTREE},
   { "fall",  DEBUG_FALLBACKS},
   { "verb",  DEBUG_VERBOSE},
   { "bat",   DEBUG_BATCH},
   { "pix",   DEBUG_PIXEL},
   { "buf",   DEBUG_BUFMGR},
   { "reg",   DEBUG_REGION},
   { "fbo",   DEBUG_FBO},
   { "lock",  DEBUG_LOCK},
   { "sync",  DEBUG_SYNC},
   { "prim",  DEBUG_PRIMS },
   { "vert",  DEBUG_VERTS },
   { "dri",   DEBUG_DRI },
   { "dma",   DEBUG_DMA },
   { "san",   DEBUG_SANITY },
   { "sleep", DEBUG_SLEEP },
   { "stats", DEBUG_STATS },
   { "tile",  DEBUG_TILE },
   { "sing",  DEBUG_SINGLE_THREAD },
   { "thre",  DEBUG_SINGLE_THREAD },
   { "wm",    DEBUG_WM },
   { "urb",   DEBUG_URB },
   { "vs",    DEBUG_VS },
   { NULL,    0 }
};


static void
intelInvalidateState(GLcontext * ctx, GLuint new_state)
{
    struct intel_context *intel = intel_context(ctx);

   _swrast_InvalidateState(ctx, new_state);
   _swsetup_InvalidateState(ctx, new_state);
   _vbo_InvalidateState(ctx, new_state);
   _tnl_InvalidateState(ctx, new_state);
   _tnl_invalidate_vertex_state(ctx, new_state);

   intel->NewGLState |= new_state;

   if (intel->vtbl.invalidate_state)
      intel->vtbl.invalidate_state( intel, new_state );
}

void
intel_flush(GLcontext *ctx, GLboolean needs_mi_flush)
{
   struct intel_context *intel = intel_context(ctx);

   if (intel->Fallback)
      _swrast_flush(ctx);

   if (intel->gen < 4)
      INTEL_FIREVERTICES(intel);

   if (intel->batch->map != intel->batch->ptr)
      intel_batchbuffer_flush(intel->batch);

   if ((ctx->DrawBuffer->Name == 0) && intel->front_buffer_dirty) {
      __DRIscreen *const screen = intel->intelScreen->driScrnPriv;

      if (screen->dri2.loader &&
          (screen->dri2.loader->base.version >= 2)
	  && (screen->dri2.loader->flushFrontBuffer != NULL) &&
          intel->driDrawable && intel->driDrawable->loaderPrivate) {
	 (*screen->dri2.loader->flushFrontBuffer)(intel->driDrawable,
						  intel->driDrawable->loaderPrivate);

	 /* Only clear the dirty bit if front-buffer rendering is no longer
	  * enabled.  This is done so that the dirty bit can only be set in
	  * glDrawBuffer.  Otherwise the dirty bit would have to be set at
	  * each of N places that do rendering.  This has worse performances,
	  * but it is much easier to get correct.
	  */
	 if (!intel->is_front_buffer_rendering) {
	    intel->front_buffer_dirty = GL_FALSE;
	 }
      }
   }
}

void
intelFlush(GLcontext * ctx)
{
   intel_flush(ctx, GL_FALSE);
}

static void
intel_glFlush(GLcontext *ctx)
{
   struct intel_context *intel = intel_context(ctx);

   intel_flush(ctx, GL_TRUE);

   /* We're using glFlush as an indicator that a frame is done, which is
    * what DRI2 does before calling SwapBuffers (and means we should catch
    * people doing front-buffer rendering, as well)..
    *
    * Wait for the swapbuffers before the one we just emitted, so we don't
    * get too many swaps outstanding for apps that are GPU-heavy but not
    * CPU-heavy.
    *
    * Unfortunately, we don't have a handle to the batch containing the swap,
    * and getting our hands on that doesn't seem worth it, so we just us the
    * first batch we emitted after the last swap.
    */
   if (!intel->using_dri2_swapbuffers &&
       intel->first_post_swapbuffers_batch != NULL) {
      drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
      drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
      intel->first_post_swapbuffers_batch = NULL;
   }
}

void
intelFinish(GLcontext * ctx)
{
   struct gl_framebuffer *fb = ctx->DrawBuffer;
   int i;

   intelFlush(ctx);

   for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
       struct intel_renderbuffer *irb;

       irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);

       if (irb && irb->region)
	  dri_bo_wait_rendering(irb->region->buffer);
   }
   if (fb->_DepthBuffer) {
      /* XXX: Wait on buffer idle */
   }
}

void
intelInitDriverFunctions(struct dd_function_table *functions)
{
   _mesa_init_driver_functions(functions);

   functions->Flush = intel_glFlush;
   functions->Finish = intelFinish;
   functions->GetString = intelGetString;
   functions->UpdateState = intelInvalidateState;

   intelInitTextureFuncs(functions);
   intelInitTextureImageFuncs(functions);
   intelInitTextureSubImageFuncs(functions);
   intelInitTextureCopyImageFuncs(functions);
   intelInitStateFuncs(functions);
   intelInitClearFuncs(functions);
   intelInitBufferFuncs(functions);
   intelInitPixelFuncs(functions);
   intelInitBufferObjectFuncs(functions);
   intel_init_syncobj_functions(functions);
}


GLboolean
intelInitContext(struct intel_context *intel,
                 const __GLcontextModes * mesaVis,
                 __DRIcontext * driContextPriv,
                 void *sharedContextPrivate,
                 struct dd_function_table *functions)
{
   GLcontext *ctx = &intel->ctx;
   GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
   int bo_reuse_mode;

   if (!_mesa_initialize_context(&intel->ctx, mesaVis, shareCtx,
                                 functions, (void *) intel)) {
      _mesa_printf("%s: failed to init mesa context\n", __FUNCTION__);
      return GL_FALSE;
   }

   driContextPriv->driverPrivate = intel;
   intel->intelScreen = intelScreen;
   intel->driScreen = sPriv;
   intel->driContext = driContextPriv;
   intel->driFd = sPriv->fd;

   if (IS_965(intel->intelScreen->deviceID)) {
      intel->gen = 4;
   } else if (IS_9XX(intel->intelScreen->deviceID)) {
      intel->gen = 3;
      if (IS_945(intel->intelScreen->deviceID)) {
	 intel->is_945 = GL_TRUE;
      }
   } else {
      intel->gen = 2;
   }

   if (IS_IGDNG(intel->intelScreen->deviceID)) {
      intel->is_ironlake = GL_TRUE;
      intel->needs_ff_sync = GL_TRUE;
      intel->has_luminance_srgb = GL_TRUE;
   } else if (IS_G4X(intel->intelScreen->deviceID)) {
      intel->has_luminance_srgb = GL_TRUE;
      intel->is_g4x = GL_TRUE;
   }

   driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
                       intel->driScreen->myNum,
		       (intel->gen >= 4) ? "i965" : "i915");
   if (intelScreen->deviceID == PCI_CHIP_I865_G)
      intel->maxBatchSize = 4096;
   else
      intel->maxBatchSize = BATCH_SZ;

   intel->bufmgr = intelScreen->bufmgr;

   bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
   switch (bo_reuse_mode) {
   case DRI_CONF_BO_REUSE_DISABLED:
      break;
   case DRI_CONF_BO_REUSE_ALL:
      intel_bufmgr_gem_enable_reuse(intel->bufmgr);
      break;
   }

   /* This doesn't yet catch all non-conformant rendering, but it's a
    * start.
    */
   if (getenv("INTEL_STRICT_CONFORMANCE")) {
      unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE"));
      if (value > 0) {
         intel->conformance_mode = value;
      }
      else {
         intel->conformance_mode = 1;
      }
   }

   if (intel->conformance_mode > 0) {
      ctx->Const.MinLineWidth = 1.0;
      ctx->Const.MinLineWidthAA = 1.0;
      ctx->Const.MaxLineWidth = 1.0;
      ctx->Const.MaxLineWidthAA = 1.0;
      ctx->Const.LineWidthGranularity = 1.0;
   }
   else {
      ctx->Const.MinLineWidth = 1.0;
      ctx->Const.MinLineWidthAA = 1.0;
      ctx->Const.MaxLineWidth = 5.0;
      ctx->Const.MaxLineWidthAA = 5.0;
      ctx->Const.LineWidthGranularity = 0.5;
   }

   ctx->Const.MinPointSize = 1.0;
   ctx->Const.MinPointSizeAA = 1.0;
   ctx->Const.MaxPointSize = 255.0;
   ctx->Const.MaxPointSizeAA = 3.0;
   ctx->Const.PointSizeGranularity = 1.0;

   /* reinitialize the context point state.
    * It depend on constants in __GLcontextRec::Const
    */
   _mesa_init_point(ctx);

   meta_init_metaops(ctx, &intel->meta);
   ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
   if (intel->gen >= 4) {
      if (MAX_WIDTH > 8192)
	 ctx->Const.MaxRenderbufferSize = 8192;
   } else {
      if (MAX_WIDTH > 2048)
	 ctx->Const.MaxRenderbufferSize = 2048;
   }

   /* Initialize the software rasterizer and helper modules. */
   _swrast_CreateContext(ctx);
   _vbo_CreateContext(ctx);
   _tnl_CreateContext(ctx);
   _swsetup_CreateContext(ctx);
 
   /* Configure swrast to match hardware characteristics: */
   _swrast_allow_pixel_fog(ctx, GL_FALSE);
   _swrast_allow_vertex_fog(ctx, GL_TRUE);

   _mesa_meta_init(ctx);

   intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
   intel->hw_stipple = 1;

   /* XXX FBO: this doesn't seem to be used anywhere */
   switch (mesaVis->depthBits) {
   case 0:                     /* what to do in this case? */
   case 16:
      intel->polygon_offset_scale = 1.0;
      break;
   case 24:
      intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
      break;
   default:
      assert(0);
      break;
   }

   if (intel->gen >= 4)
      intel->polygon_offset_scale /= 0xffff;

   intel->RenderIndex = ~0;

   if (intel->gen >= 4 && !intel->intelScreen->irq_active) {
      _mesa_printf("IRQs not active.  Exiting\n");
      exit(1);
   }

   intelInitExtensions(ctx);

   INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
   if (INTEL_DEBUG & DEBUG_BUFMGR)
      dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);

   intel->batch = intel_batchbuffer_alloc(intel);

   intel_fbo_init(intel);

   if (intel->ctx.Mesa_DXTn) {
      _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
      _mesa_enable_extension(ctx, "GL_S3_s3tc");
   }
   else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
      _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
   }
   intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
					       "texture_tiling");
   if (intel->use_texture_tiling &&
       !intel->intelScreen->kernel_exec_fencing) {
      fprintf(stderr, "No kernel support for execution fencing, "
	      "disabling texture tiling\n");
      intel->use_texture_tiling = GL_FALSE;
   }
   intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");

   intel->prim.primitive = ~0;

   /* Force all software fallbacks */
   if (driQueryOptionb(&intel->optionCache, "no_rast")) {
      fprintf(stderr, "disabling 3D rasterization\n");
      intel->no_rast = 1;
   }

   if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
      fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
      intel->always_flush_batch = 1;
   }

   if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
      fprintf(stderr, "flushing GPU caches before/after each draw call\n");
      intel->always_flush_cache = 1;
   }

   /* Disable all hardware rendering (skip emitting batches and fences/waits
    * to the kernel)
    */
   intel->no_hw = getenv("INTEL_NO_HW") != NULL;

   return GL_TRUE;
}

void
intelDestroyContext(__DRIcontext * driContextPriv)
{
   struct intel_context *intel =
      (struct intel_context *) driContextPriv->driverPrivate;

   assert(intel);               /* should never be null */
   if (intel) {
      GLboolean release_texture_heaps;

      INTEL_FIREVERTICES(intel);

      _mesa_meta_free(&intel->ctx);

      meta_destroy_metaops(&intel->meta);

      intel->vtbl.destroy(intel);

      release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
      _swsetup_DestroyContext(&intel->ctx);
      _tnl_DestroyContext(&intel->ctx);
      _vbo_DestroyContext(&intel->ctx);

      _swrast_DestroyContext(&intel->ctx);
      intel->Fallback = 0x0;      /* don't call _swrast_Flush later */

      intel_batchbuffer_free(intel->batch);
      intel->batch = NULL;

      free(intel->prim.vb);
      intel->prim.vb = NULL;
      dri_bo_unreference(intel->prim.vb_bo);
      intel->prim.vb_bo = NULL;
      dri_bo_unreference(intel->first_post_swapbuffers_batch);
      intel->first_post_swapbuffers_batch = NULL;

      if (release_texture_heaps) {
         /* Nothing is currently done here to free texture heaps;
          * but we're not using the texture heap utilities, so I
          * rather think we shouldn't.  I've taken a look, and can't
          * find any private texture data hanging around anywhere, but
          * I'm not yet certain there isn't any at all...
          */
         /* if (INTEL_DEBUG & DEBUG_TEXTURE)
            fprintf(stderr, "do something to free texture heaps\n");
          */
      }

      driDestroyOptionCache(&intel->optionCache);

      /* free the Mesa context */
      _mesa_free_context_data(&intel->ctx);

      FREE(intel);
      driContextPriv->driverPrivate = NULL;
   }
}

GLboolean
intelUnbindContext(__DRIcontext * driContextPriv)
{
   struct intel_context *intel =
      (struct intel_context *) driContextPriv->driverPrivate;

   /* Deassociate the context with the drawables.
    */
   intel->driDrawable = NULL;
   intel->driReadDrawable = NULL;

   return GL_TRUE;
}

GLboolean
intelMakeCurrent(__DRIcontext * driContextPriv,
                 __DRIdrawable * driDrawPriv,
                 __DRIdrawable * driReadPriv)
{
   struct intel_context *intel;
   GET_CURRENT_CONTEXT(curCtx);

   if (driContextPriv)
      intel = (struct intel_context *) driContextPriv->driverPrivate;
   else
      intel = NULL;

   /* According to the glXMakeCurrent() man page: "Pending commands to
    * the previous context, if any, are flushed before it is released."
    * But only flush if we're actually changing contexts.
    */
   if (intel_context(curCtx) && intel_context(curCtx) != intel) {
      _mesa_flush(curCtx);
   }

   if (driContextPriv) {
      struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
      struct gl_framebuffer *readFb = driReadPriv->driverPrivate;
 
      intel_update_renderbuffers(driContextPriv, driDrawPriv);
      if (driDrawPriv != driReadPriv)
	 intel_update_renderbuffers(driContextPriv, driReadPriv);

      /* set GLframebuffer size to match window, if needed */
      driUpdateFramebufferSize(&intel->ctx, driDrawPriv);

      if (driReadPriv != driDrawPriv) {
	 driUpdateFramebufferSize(&intel->ctx, driReadPriv);
      }

      _mesa_make_current(&intel->ctx, fb, readFb);
      intel->driReadDrawable = driReadPriv;
      intel->driDrawable = driDrawPriv;
      intel_draw_buffer(&intel->ctx, fb);
   }
   else {
      _mesa_make_current(NULL, NULL, NULL);
   }

   return GL_TRUE;
}