summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/intel/intel_tex_image.c
blob: a206fe6805b97b48b7af9962a30449af062da7aa (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

#include "main/glheader.h"
#include "main/macros.h"
#include "main/mtypes.h"
#include "main/enums.h"
#include "main/bufferobj.h"
#include "main/convolve.h"
#include "main/context.h"
#include "main/texcompress.h"
#include "main/texformat.h"
#include "main/texgetimage.h"
#include "main/texobj.h"
#include "main/texstore.h"
#include "main/teximage.h"

#include "intel_context.h"
#include "intel_mipmap_tree.h"
#include "intel_buffer_objects.h"
#include "intel_batchbuffer.h"
#include "intel_tex.h"
#include "intel_blit.h"
#include "intel_fbo.h"

#define FILE_DEBUG_FLAG DEBUG_TEXTURE

/* Functions to store texture images.  Where possible, mipmap_tree's
 * will be created or further instantiated with image data, otherwise
 * images will be stored in malloc'd memory.  A validation step is
 * required to pull those images into a mipmap tree, or otherwise
 * decide a fallback is required.
 */


static int
logbase2(int n)
{
   GLint i = 1;
   GLint log2 = 0;

   while (n > i) {
      i *= 2;
      log2++;
   }

   return log2;
}


/* Otherwise, store it in memory if (Border != 0) or (any dimension ==
 * 1).
 *    
 * Otherwise, if max_level >= level >= min_level, create tree with
 * space for textures from min_level down to max_level.
 *
 * Otherwise, create tree with space for textures from (level
 * 0)..(1x1).  Consider pruning this tree at a validation if the
 * saving is worth it.
 */
static void
guess_and_alloc_mipmap_tree(struct intel_context *intel,
                            struct intel_texture_object *intelObj,
                            struct intel_texture_image *intelImage,
			    GLboolean expect_accelerated_upload)
{
   GLuint firstLevel;
   GLuint lastLevel;
   GLuint width = intelImage->base.Width;
   GLuint height = intelImage->base.Height;
   GLuint depth = intelImage->base.Depth;
   GLuint l2width, l2height, l2depth;
   GLuint i, comp_byte = 0;

   DBG("%s\n", __FUNCTION__);

   if (intelImage->base.Border ||
       ((intelImage->base._BaseFormat == GL_DEPTH_COMPONENT) && 
        ((intelObj->base.WrapS == GL_CLAMP_TO_BORDER) ||
         (intelObj->base.WrapT == GL_CLAMP_TO_BORDER))))
      return;

   if (intelImage->level > intelObj->base.BaseLevel &&
       (intelImage->base.Width == 1 ||
        (intelObj->base.Target != GL_TEXTURE_1D &&
         intelImage->base.Height == 1) ||
        (intelObj->base.Target == GL_TEXTURE_3D &&
         intelImage->base.Depth == 1)))
      return;

   /* If this image disrespects BaseLevel, allocate from level zero.
    * Usually BaseLevel == 0, so it's unlikely to happen.
    */
   if (intelImage->level < intelObj->base.BaseLevel)
      firstLevel = 0;
   else
      firstLevel = intelObj->base.BaseLevel;


   /* Figure out image dimensions at start level. 
    */
   for (i = intelImage->level; i > firstLevel; i--) {
      width <<= 1;
      if (height != 1)
         height <<= 1;
      if (depth != 1)
         depth <<= 1;
   }

   /* Guess a reasonable value for lastLevel.  This is probably going
    * to be wrong fairly often and might mean that we have to look at
    * resizable buffers, or require that buffers implement lazy
    * pagetable arrangements.
    */
   if ((intelObj->base.MinFilter == GL_NEAREST ||
        intelObj->base.MinFilter == GL_LINEAR) &&
       intelImage->level == firstLevel) {
      lastLevel = firstLevel;
   }
   else {
      l2width = logbase2(width);
      l2height = logbase2(height);
      l2depth = logbase2(depth);
      lastLevel = firstLevel + MAX2(MAX2(l2width, l2height), l2depth);
   }

   assert(!intelObj->mt);
   if (intelImage->base.IsCompressed)
      comp_byte = intel_compressed_num_bytes(intelImage->base.TexFormat->MesaFormat);
   intelObj->mt = intel_miptree_create(intel,
                                       intelObj->base.Target,
                                       intelImage->base._BaseFormat,
                                       intelImage->base.InternalFormat,
                                       firstLevel,
                                       lastLevel,
                                       width,
                                       height,
                                       depth,
                                       intelImage->base.TexFormat->TexelBytes,
                                       comp_byte,
				       expect_accelerated_upload);

   DBG("%s - success\n", __FUNCTION__);
}




static GLuint
target_to_face(GLenum target)
{
   switch (target) {
   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
      return ((GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X);
   default:
      return 0;
   }
}

/* There are actually quite a few combinations this will work for,
 * more than what I've listed here.
 */
static GLboolean
check_pbo_format(GLint internalFormat,
                 GLenum format, GLenum type,
                 const struct gl_texture_format *mesa_format)
{
   switch (internalFormat) {
   case 4:
   case GL_RGBA:
      return (format == GL_BGRA &&
              (type == GL_UNSIGNED_BYTE ||
               type == GL_UNSIGNED_INT_8_8_8_8_REV) &&
              mesa_format == &_mesa_texformat_argb8888);
   case 3:
   case GL_RGB:
      return (format == GL_RGB &&
              type == GL_UNSIGNED_SHORT_5_6_5 &&
              mesa_format == &_mesa_texformat_rgb565);
   case GL_YCBCR_MESA:
      return (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE);
   default:
      return GL_FALSE;
   }
}


/* XXX: Do this for TexSubImage also:
 */
static GLboolean
try_pbo_upload(struct intel_context *intel,
               struct intel_texture_image *intelImage,
               const struct gl_pixelstore_attrib *unpack,
               GLint internalFormat,
               GLint width, GLint height,
               GLenum format, GLenum type, const void *pixels)
{
   struct intel_buffer_object *pbo = intel_buffer_object(unpack->BufferObj);
   GLuint src_offset, src_stride;
   GLuint dst_offset, dst_stride;

   if (!_mesa_is_bufferobj(unpack->BufferObj) ||
       intel->ctx._ImageTransferState ||
       unpack->SkipPixels || unpack->SkipRows) {
      DBG("%s: failure 1\n", __FUNCTION__);
      return GL_FALSE;
   }

   /* note: potential 64-bit ptr to 32-bit int cast */
   src_offset = (GLuint) (unsigned long) pixels;

   if (unpack->RowLength > 0)
      src_stride = unpack->RowLength;
   else
      src_stride = width;

   dst_offset = intel_miptree_image_offset(intelImage->mt,
                                           intelImage->face,
                                           intelImage->level);

   dst_stride = intelImage->mt->pitch;

   intelFlush(&intel->ctx);
   LOCK_HARDWARE(intel);
   {
      dri_bo *src_buffer = intel_bufferobj_buffer(intel, pbo, INTEL_READ);
      dri_bo *dst_buffer = intel_region_buffer(intel,
					       intelImage->mt->region,
					       INTEL_WRITE_FULL);


      if (!intelEmitCopyBlit(intel,
			     intelImage->mt->cpp,
			     src_stride, src_buffer, src_offset, GL_FALSE,
			     dst_stride, dst_buffer, dst_offset, GL_FALSE,
			     0, 0, 0, 0, width, height,
			     GL_COPY)) {
	 UNLOCK_HARDWARE(intel);
	 return GL_FALSE;
      }
   }
   UNLOCK_HARDWARE(intel);

   return GL_TRUE;
}


static GLboolean
try_pbo_zcopy(struct intel_context *intel,
              struct intel_texture_image *intelImage,
              const struct gl_pixelstore_attrib *unpack,
              GLint internalFormat,
              GLint width, GLint height,
              GLenum format, GLenum type, const void *pixels)
{
   struct intel_buffer_object *pbo = intel_buffer_object(unpack->BufferObj);
   GLuint src_offset, src_stride;
   GLuint dst_offset, dst_stride;

   if (!_mesa_is_bufferobj(unpack->BufferObj) ||
       intel->ctx._ImageTransferState ||
       unpack->SkipPixels || unpack->SkipRows) {
      DBG("%s: failure 1\n", __FUNCTION__);
      return GL_FALSE;
   }

   /* note: potential 64-bit ptr to 32-bit int cast */
   src_offset = (GLuint) (unsigned long) pixels;

   if (unpack->RowLength > 0)
      src_stride = unpack->RowLength;
   else
      src_stride = width;

   dst_offset = intel_miptree_image_offset(intelImage->mt,
                                           intelImage->face,
                                           intelImage->level);

   dst_stride = intelImage->mt->pitch;

   if (src_stride != dst_stride || dst_offset != 0 || src_offset != 0) {
      DBG("%s: failure 2\n", __FUNCTION__);
      return GL_FALSE;
   }

   intel_region_attach_pbo(intel, intelImage->mt->region, pbo);

   return GL_TRUE;
}


static void
intelTexImage(GLcontext * ctx,
              GLint dims,
              GLenum target, GLint level,
              GLint internalFormat,
              GLint width, GLint height, GLint depth,
              GLint border,
              GLenum format, GLenum type, const void *pixels,
              const struct gl_pixelstore_attrib *unpack,
              struct gl_texture_object *texObj,
              struct gl_texture_image *texImage, GLsizei imageSize,
              GLboolean compressed)
{
   struct intel_context *intel = intel_context(ctx);
   struct intel_texture_object *intelObj = intel_texture_object(texObj);
   struct intel_texture_image *intelImage = intel_texture_image(texImage);
   GLint postConvWidth = width;
   GLint postConvHeight = height;
   GLint texelBytes, sizeInBytes;
   GLuint dstRowStride = 0, srcRowStride = texImage->RowStride;

   DBG("%s target %s level %d %dx%dx%d border %d\n", __FUNCTION__,
       _mesa_lookup_enum_by_nr(target), level, width, height, depth, border);

   intelFlush(ctx);

   intelImage->face = target_to_face(target);
   intelImage->level = level;

   if (ctx->_ImageTransferState & IMAGE_CONVOLUTION_BIT) {
      _mesa_adjust_image_for_convolution(ctx, dims, &postConvWidth,
                                         &postConvHeight);
   }

   /* choose the texture format */
   texImage->TexFormat = intelChooseTextureFormat(ctx, internalFormat,
                                                  format, type);

   _mesa_set_fetch_functions(texImage, dims);

   if (texImage->TexFormat->TexelBytes == 0) {
      /* must be a compressed format */
      texelBytes = 0;
      texImage->IsCompressed = GL_TRUE;
      texImage->CompressedSize =
	 ctx->Driver.CompressedTextureSize(ctx, texImage->Width,
					   texImage->Height, texImage->Depth,
					   texImage->TexFormat->MesaFormat);
   } else {
      texelBytes = texImage->TexFormat->TexelBytes;
      
      /* Minimum pitch of 32 bytes */
      if (postConvWidth * texelBytes < 32) {
	 postConvWidth = 32 / texelBytes;
	 texImage->RowStride = postConvWidth;
      }

      if (!intelImage->mt) {      
	  assert(texImage->RowStride == postConvWidth);
      }
   }

   /* Release the reference to a potentially orphaned buffer.   
    * Release any old malloced memory.
    */
   if (intelImage->mt) {
      intel_miptree_release(intel, &intelImage->mt);
      assert(!texImage->Data);
   }
   else if (texImage->Data) {
      _mesa_free_texmemory(texImage->Data);
      texImage->Data = NULL;
   }

   /* If this is the only texture image in the tree, could call
    * bmBufferData with NULL data to free the old block and avoid
    * waiting on any outstanding fences.
    */
   if (intelObj->mt &&
       intelObj->mt->first_level == level &&
       intelObj->mt->last_level == level &&
       intelObj->mt->target != GL_TEXTURE_CUBE_MAP_ARB &&
       !intel_miptree_match_image(intelObj->mt, &intelImage->base,
                                  intelImage->face, intelImage->level)) {

      DBG("release it\n");
      intel_miptree_release(intel, &intelObj->mt);
      assert(!intelObj->mt);
   }

   if (!intelObj->mt) {
      guess_and_alloc_mipmap_tree(intel, intelObj, intelImage, pixels == NULL);
      if (!intelObj->mt) {
	 DBG("guess_and_alloc_mipmap_tree: failed\n");
      }
   }

   assert(!intelImage->mt);

   if (intelObj->mt &&
       intel_miptree_match_image(intelObj->mt, &intelImage->base,
                                 intelImage->face, intelImage->level)) {

      intel_miptree_reference(&intelImage->mt, intelObj->mt);
      assert(intelImage->mt);
   } else if (intelImage->base.Border == 0) {
      int comp_byte = 0;

      if (intelImage->base.IsCompressed) {
	 comp_byte =
	    intel_compressed_num_bytes(intelImage->base.TexFormat->MesaFormat);
      }

      /* Didn't fit in the object miptree, but it's suitable for inclusion in
       * a miptree, so create one just for our level and store it in the image.
       * It'll get moved into the object miptree at validate time.
       */
      intelImage->mt = intel_miptree_create(intel, target,
					    intelImage->base.TexFormat->BaseFormat,
					    internalFormat,
					    level, level,
					    width, height, depth,
					    intelImage->base.TexFormat->TexelBytes,
					    comp_byte, pixels == NULL);

   }

   /* PBO fastpaths:
    */
   if (dims <= 2 &&
       intelImage->mt &&
       _mesa_is_bufferobj(unpack->BufferObj) &&
       check_pbo_format(internalFormat, format,
                        type, intelImage->base.TexFormat)) {

      DBG("trying pbo upload\n");

      /* Attempt to texture directly from PBO data (zero copy upload).
       *
       * Currently disable as it can lead to worse as well as better
       * performance (in particular when intel_region_cow() is
       * required).
       */
      if (intelObj->mt == intelImage->mt &&
          intelObj->mt->first_level == level &&
          intelObj->mt->last_level == level) {

         if (try_pbo_zcopy(intel, intelImage, unpack,
                           internalFormat,
                           width, height, format, type, pixels)) {

            DBG("pbo zcopy upload succeeded\n");
            return;
         }
      }


      /* Otherwise, attempt to use the blitter for PBO image uploads.
       */
      if (try_pbo_upload(intel, intelImage, unpack,
                         internalFormat,
                         width, height, format, type, pixels)) {
         DBG("pbo upload succeeded\n");
         return;
      }

      DBG("pbo upload failed\n");
   }

   /* intelCopyTexImage calls this function with pixels == NULL, with
    * the expectation that the mipmap tree will be set up but nothing
    * more will be done.  This is where those calls return:
    */
   if (compressed) {
      pixels = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, pixels,
						      unpack,
						      "glCompressedTexImage");
   } else {
      pixels = _mesa_validate_pbo_teximage(ctx, dims, width, height, 1,
					   format, type,
					   pixels, unpack, "glTexImage");
   }

   LOCK_HARDWARE(intel);

   if (intelImage->mt) {
      if (pixels != NULL)
         texImage->Data = intel_miptree_image_map(intel,
                                                  intelImage->mt,
                                                  intelImage->face,
                                                  intelImage->level,
                                                  &dstRowStride,
                                                  intelImage->base.ImageOffsets);
      texImage->RowStride = dstRowStride / intelImage->mt->cpp;
   }
   else {
      /* Allocate regular memory and store the image there temporarily.   */
      if (texImage->IsCompressed) {
         sizeInBytes = texImage->CompressedSize;
         dstRowStride =
            _mesa_compressed_row_stride(texImage->TexFormat->MesaFormat, width);
         assert(dims != 3);
      }
      else {
         dstRowStride = postConvWidth * texelBytes;
         sizeInBytes = depth * dstRowStride * postConvHeight;
      }

      texImage->Data = _mesa_alloc_texmemory(sizeInBytes);
   }

   DBG("Upload image %dx%dx%d row_len %d "
       "pitch %d pixels %d compressed %d\n",
       width, height, depth, width * texelBytes, dstRowStride,
       pixels ? 1 : 0, compressed);

   /* Copy data.  Would like to know when it's ok for us to eg. use
    * the blitter to copy.  Or, use the hardware to do the format
    * conversion and copy:
    */
   if (pixels) {
       if (compressed) {
	   if (intelImage->mt) {
	       struct intel_region *dst = intelImage->mt->region;
	       _mesa_copy_rect(texImage->Data, dst->cpp, dst->pitch,
			       0, 0,
			       intelImage->mt->level[level].width,
			       (intelImage->mt->level[level].height+3)/4,
			       pixels,
			       srcRowStride,
			       0, 0);
	   } else
	       memcpy(texImage->Data, pixels, imageSize);
       } else if (!texImage->TexFormat->StoreImage(ctx, dims, 
						   texImage->_BaseFormat, 
						   texImage->TexFormat, 
						   texImage->Data, 0, 0, 0, /* dstX/Y/Zoffset */
						   dstRowStride,
						   texImage->ImageOffsets,
						   width, height, depth,
						   format, type, pixels, unpack)) {
	   _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
       }
   }

   _mesa_unmap_teximage_pbo(ctx, unpack);

   if (intelImage->mt) {
      if (pixels != NULL)
         intel_miptree_image_unmap(intel, intelImage->mt);
      texImage->Data = NULL;
   }

   UNLOCK_HARDWARE(intel);

   /* GL_SGIS_generate_mipmap */
   if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
      intel_generate_mipmap(ctx, target, texObj);
   }
}


static void
intelTexImage3D(GLcontext * ctx,
                GLenum target, GLint level,
                GLint internalFormat,
                GLint width, GLint height, GLint depth,
                GLint border,
                GLenum format, GLenum type, const void *pixels,
                const struct gl_pixelstore_attrib *unpack,
                struct gl_texture_object *texObj,
                struct gl_texture_image *texImage)
{
   intelTexImage(ctx, 3, target, level,
                 internalFormat, width, height, depth, border,
                 format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);
}


static void
intelTexImage2D(GLcontext * ctx,
                GLenum target, GLint level,
                GLint internalFormat,
                GLint width, GLint height, GLint border,
                GLenum format, GLenum type, const void *pixels,
                const struct gl_pixelstore_attrib *unpack,
                struct gl_texture_object *texObj,
                struct gl_texture_image *texImage)
{
   intelTexImage(ctx, 2, target, level,
                 internalFormat, width, height, 1, border,
                 format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);
}


static void
intelTexImage1D(GLcontext * ctx,
                GLenum target, GLint level,
                GLint internalFormat,
                GLint width, GLint border,
                GLenum format, GLenum type, const void *pixels,
                const struct gl_pixelstore_attrib *unpack,
                struct gl_texture_object *texObj,
                struct gl_texture_image *texImage)
{
   intelTexImage(ctx, 1, target, level,
                 internalFormat, width, 1, 1, border,
                 format, type, pixels, unpack, texObj, texImage, 0, GL_FALSE);
}


static void
intelCompressedTexImage2D( GLcontext *ctx, GLenum target, GLint level,
                           GLint internalFormat,
                           GLint width, GLint height, GLint border,
                           GLsizei imageSize, const GLvoid *data,
                           struct gl_texture_object *texObj,
                           struct gl_texture_image *texImage )
{
   intelTexImage(ctx, 2, target, level,
		 internalFormat, width, height, 1, border,
		 0, 0, data, &ctx->Unpack, texObj, texImage, imageSize, GL_TRUE);
}


/**
 * Need to map texture image into memory before copying image data,
 * then unmap it.
 */
static void
intel_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
		    GLenum format, GLenum type, GLvoid * pixels,
		    struct gl_texture_object *texObj,
		    struct gl_texture_image *texImage, GLboolean compressed)
{
   struct intel_context *intel = intel_context(ctx);
   struct intel_texture_image *intelImage = intel_texture_image(texImage);

   /* If we're reading from a texture that has been rendered to, need to
    * make sure rendering is complete.
    * We could probably predicate this on texObj->_RenderToTexture
    */
   intelFlush(ctx);

   /* Map */
   if (intelImage->mt) {
      /* Image is stored in hardware format in a buffer managed by the
       * kernel.  Need to explicitly map and unmap it.
       */
      intelImage->base.Data =
         intel_miptree_image_map(intel,
                                 intelImage->mt,
                                 intelImage->face,
                                 intelImage->level,
                                 &intelImage->base.RowStride,
                                 intelImage->base.ImageOffsets);
      intelImage->base.RowStride /= intelImage->mt->cpp;
   }
   else {
      /* Otherwise, the image should actually be stored in
       * intelImage->base.Data.  This is pretty confusing for
       * everybody, I'd much prefer to separate the two functions of
       * texImage->Data - storage for texture images in main memory
       * and access (ie mappings) of images.  In other words, we'd
       * create a new texImage->Map field and leave Data simply for
       * storage.
       */
      assert(intelImage->base.Data);
   }


   if (compressed) {
      _mesa_get_compressed_teximage(ctx, target, level, pixels,
				    texObj, texImage);
   } else {
      _mesa_get_teximage(ctx, target, level, format, type, pixels,
			 texObj, texImage);
   }
     

   /* Unmap */
   if (intelImage->mt) {
      intel_miptree_image_unmap(intel, intelImage->mt);
      intelImage->base.Data = NULL;
   }
}


static void
intelGetTexImage(GLcontext * ctx, GLenum target, GLint level,
                 GLenum format, GLenum type, GLvoid * pixels,
                 struct gl_texture_object *texObj,
                 struct gl_texture_image *texImage)
{
   intel_get_tex_image(ctx, target, level, format, type, pixels,
		       texObj, texImage, GL_FALSE);
}


static void
intelGetCompressedTexImage(GLcontext *ctx, GLenum target, GLint level,
			   GLvoid *pixels,
			   struct gl_texture_object *texObj,
			   struct gl_texture_image *texImage)
{
   intel_get_tex_image(ctx, target, level, 0, 0, pixels,
		       texObj, texImage, GL_TRUE);
}


void
intelSetTexOffset(__DRIcontext *pDRICtx, GLint texname,
		  unsigned long long offset, GLint depth, GLuint pitch)
{
   struct intel_context *intel = pDRICtx->driverPrivate;
   struct gl_texture_object *tObj = _mesa_lookup_texture(&intel->ctx, texname);
   struct intel_texture_object *intelObj = intel_texture_object(tObj);

   if (!intelObj)
      return;

   if (intelObj->mt)
      intel_miptree_release(intel, &intelObj->mt);

   intelObj->imageOverride = GL_TRUE;
   intelObj->depthOverride = depth;
   intelObj->pitchOverride = pitch;

   if (offset)
      intelObj->textureOffset = offset;
}

void
intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
		   GLint glx_texture_format,
		   __DRIdrawable *dPriv)
{
   struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
   struct intel_context *intel = pDRICtx->driverPrivate;
   struct intel_texture_object *intelObj;
   struct intel_texture_image *intelImage;
   struct intel_mipmap_tree *mt;
   struct intel_renderbuffer *rb;
   struct gl_texture_unit *texUnit;
   struct gl_texture_object *texObj;
   struct gl_texture_image *texImage;
   int level = 0, type, format, internalFormat;

   texUnit = &intel->ctx.Texture.Unit[intel->ctx.Texture.CurrentUnit];
   texObj = _mesa_select_tex_object(&intel->ctx, texUnit, target);
   intelObj = intel_texture_object(texObj);

   if (!intelObj)
      return;

   intel_update_renderbuffers(pDRICtx, dPriv);

   rb = intel_fb->color_rb[0];
   /* If the region isn't set, then intel_update_renderbuffers was unable
    * to get the buffers for the drawable.
    */
   if (rb->region == NULL)
      return;

   type = GL_BGRA;
   format = GL_UNSIGNED_BYTE;
   if (glx_texture_format == GLX_TEXTURE_FORMAT_RGB_EXT)
      internalFormat = GL_RGB;
   else
      internalFormat = GL_RGBA;

   mt = intel_miptree_create_for_region(intel, target,
					internalFormat,
					0, 0, rb->region, 1, 0);
   if (mt == NULL)
       return;

   _mesa_lock_texture(&intel->ctx, texObj);

   texImage = _mesa_get_tex_image(&intel->ctx, texObj, target, level);
   intelImage = intel_texture_image(texImage);

   if (intelImage->mt) {
      intel_miptree_release(intel, &intelImage->mt);
      assert(!texImage->Data);
   }
   if (intelObj->mt)
      intel_miptree_release(intel, &intelObj->mt);

   intelObj->mt = mt;
   _mesa_init_teximage_fields(&intel->ctx, target, texImage,
			      rb->region->width, rb->region->height, 1,
			      0, internalFormat);

   intelImage->face = target_to_face(target);
   intelImage->level = level;
   texImage->TexFormat = intelChooseTextureFormat(&intel->ctx, internalFormat,
                                                  type, format);
   _mesa_set_fetch_functions(texImage, 2);
   texImage->RowStride = rb->region->pitch;
   intel_miptree_reference(&intelImage->mt, intelObj->mt);

   if (!intel_miptree_match_image(intelObj->mt, &intelImage->base,
				  intelImage->face, intelImage->level)) {
	   fprintf(stderr, "miptree doesn't match image\n");
   }

   _mesa_unlock_texture(&intel->ctx, texObj);
}

void
intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
{
   /* The old interface didn't have the format argument, so copy our
    * implementation's behavior at the time.
    */
   intelSetTexBuffer2(pDRICtx, target, GLX_TEXTURE_FORMAT_RGBA_EXT, dPriv);
}


void
intelInitTextureImageFuncs(struct dd_function_table *functions)
{
   functions->TexImage1D = intelTexImage1D;
   functions->TexImage2D = intelTexImage2D;
   functions->TexImage3D = intelTexImage3D;
   functions->GetTexImage = intelGetTexImage;

   functions->CompressedTexImage2D = intelCompressedTexImage2D;
   functions->GetCompressedTexImage = intelGetCompressedTexImage;
}