summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/radeon/radeon_tex.c
blob: 87c26f89780f8262ea0df952594a6bc6be88ff4a (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
/* $XFree86: xc/lib/GL/mesa/src/drv/radeon/radeon_tex.c,v 1.6 2002/09/16 18:05:20 eich Exp $ */
/*
Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
                     VA Linux Systems Inc., Fremont, California.

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, sublicense, 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 NONINFRINGEMENT.
IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
*/

/*
 * Authors:
 *    Gareth Hughes <gareth@valinux.com>
 *    Brian Paul <brianp@valinux.com>
 */

#include "glheader.h"
#include "imports.h"
#include "colormac.h"
#include "context.h"
#include "enums.h"
#include "image.h"
#include "simple_list.h"
#include "texformat.h"
#include "texstore.h"
#include "teximage.h"
#include "texobj.h"


#include "radeon_context.h"
#include "radeon_state.h"
#include "radeon_ioctl.h"
#include "radeon_swtcl.h"
#include "radeon_tex.h"

#include "xmlpool.h"



/**
 * Set the texture wrap modes.
 * 
 * \param t Texture object whose wrap modes are to be set
 * \param swrap Wrap mode for the \a s texture coordinate
 * \param twrap Wrap mode for the \a t texture coordinate
 */

static void radeonSetTexWrap( radeonTexObjPtr t, GLenum swrap, GLenum twrap )
{
   GLboolean  is_clamp = GL_FALSE;
   GLboolean  is_clamp_to_border = GL_FALSE;

   t->pp_txfilter &= ~(RADEON_CLAMP_S_MASK | RADEON_CLAMP_T_MASK | RADEON_BORDER_MODE_D3D);

   switch ( swrap ) {
   case GL_REPEAT:
      t->pp_txfilter |= RADEON_CLAMP_S_WRAP;
      break;
   case GL_CLAMP:
      t->pp_txfilter |= RADEON_CLAMP_S_CLAMP_GL;
      is_clamp = GL_TRUE;
      break;
   case GL_CLAMP_TO_EDGE:
      t->pp_txfilter |= RADEON_CLAMP_S_CLAMP_LAST;
      break;
   case GL_CLAMP_TO_BORDER:
      t->pp_txfilter |= RADEON_CLAMP_S_CLAMP_GL;
      is_clamp_to_border = GL_TRUE;
      break;
   case GL_MIRRORED_REPEAT:
      t->pp_txfilter |= RADEON_CLAMP_S_MIRROR;
      break;
   case GL_MIRROR_CLAMP_EXT:
      t->pp_txfilter |= RADEON_CLAMP_S_MIRROR_CLAMP_GL;
      is_clamp = GL_TRUE;
      break;
   case GL_MIRROR_CLAMP_TO_EDGE_EXT:
      t->pp_txfilter |= RADEON_CLAMP_S_MIRROR_CLAMP_LAST;
      break;
   case GL_MIRROR_CLAMP_TO_BORDER_EXT:
      t->pp_txfilter |= RADEON_CLAMP_S_MIRROR_CLAMP_GL;
      is_clamp_to_border = GL_TRUE;
      break;
   default:
      _mesa_problem(NULL, "bad S wrap mode in %s", __FUNCTION__);
   }

   switch ( twrap ) {
   case GL_REPEAT:
      t->pp_txfilter |= RADEON_CLAMP_T_WRAP;
      break;
   case GL_CLAMP:
      t->pp_txfilter |= RADEON_CLAMP_T_CLAMP_GL;
      is_clamp = GL_TRUE;
      break;
   case GL_CLAMP_TO_EDGE:
      t->pp_txfilter |= RADEON_CLAMP_T_CLAMP_LAST;
      break;
   case GL_CLAMP_TO_BORDER:
      t->pp_txfilter |= RADEON_CLAMP_T_CLAMP_GL;
      is_clamp_to_border = GL_TRUE;
      break;
   case GL_MIRRORED_REPEAT:
      t->pp_txfilter |= RADEON_CLAMP_T_MIRROR;
      break;
   case GL_MIRROR_CLAMP_EXT:
      t->pp_txfilter |= RADEON_CLAMP_T_MIRROR_CLAMP_GL;
      is_clamp = GL_TRUE;
      break;
   case GL_MIRROR_CLAMP_TO_EDGE_EXT:
      t->pp_txfilter |= RADEON_CLAMP_T_MIRROR_CLAMP_LAST;
      break;
   case GL_MIRROR_CLAMP_TO_BORDER_EXT:
      t->pp_txfilter |= RADEON_CLAMP_T_MIRROR_CLAMP_GL;
      is_clamp_to_border = GL_TRUE;
      break;
   default:
      _mesa_problem(NULL, "bad T wrap mode in %s", __FUNCTION__);
   }

   if ( is_clamp_to_border ) {
      t->pp_txfilter |= RADEON_BORDER_MODE_D3D;
   }

   t->border_fallback = (is_clamp && is_clamp_to_border);
}

static void radeonSetTexMaxAnisotropy( radeonTexObjPtr t, GLfloat max )
{
   t->pp_txfilter &= ~RADEON_MAX_ANISO_MASK;

   if ( max == 1.0 ) {
      t->pp_txfilter |= RADEON_MAX_ANISO_1_TO_1;
   } else if ( max <= 2.0 ) {
      t->pp_txfilter |= RADEON_MAX_ANISO_2_TO_1;
   } else if ( max <= 4.0 ) {
      t->pp_txfilter |= RADEON_MAX_ANISO_4_TO_1;
   } else if ( max <= 8.0 ) {
      t->pp_txfilter |= RADEON_MAX_ANISO_8_TO_1;
   } else {
      t->pp_txfilter |= RADEON_MAX_ANISO_16_TO_1;
   }
}

/**
 * Set the texture magnification and minification modes.
 * 
 * \param t Texture whose filter modes are to be set
 * \param minf Texture minification mode
 * \param magf Texture magnification mode
 */

static void radeonSetTexFilter( radeonTexObjPtr t, GLenum minf, GLenum magf )
{
   GLuint anisotropy = (t->pp_txfilter & RADEON_MAX_ANISO_MASK);

   t->pp_txfilter &= ~(RADEON_MIN_FILTER_MASK | RADEON_MAG_FILTER_MASK);

   if ( anisotropy == RADEON_MAX_ANISO_1_TO_1 ) {
      switch ( minf ) {
      case GL_NEAREST:
	 t->pp_txfilter |= RADEON_MIN_FILTER_NEAREST;
	 break;
      case GL_LINEAR:
	 t->pp_txfilter |= RADEON_MIN_FILTER_LINEAR;
	 break;
      case GL_NEAREST_MIPMAP_NEAREST:
	 t->pp_txfilter |= RADEON_MIN_FILTER_NEAREST_MIP_NEAREST;
	 break;
      case GL_NEAREST_MIPMAP_LINEAR:
	 t->pp_txfilter |= RADEON_MIN_FILTER_LINEAR_MIP_NEAREST;
	 break;
      case GL_LINEAR_MIPMAP_NEAREST:
	 t->pp_txfilter |= RADEON_MIN_FILTER_NEAREST_MIP_LINEAR;
	 break;
      case GL_LINEAR_MIPMAP_LINEAR:
	 t->pp_txfilter |= RADEON_MIN_FILTER_LINEAR_MIP_LINEAR;
	 break;
      }
   } else {
      switch ( minf ) {
      case GL_NEAREST:
	 t->pp_txfilter |= RADEON_MIN_FILTER_ANISO_NEAREST;
	 break;
      case GL_LINEAR:
	 t->pp_txfilter |= RADEON_MIN_FILTER_ANISO_LINEAR;
	 break;
      case GL_NEAREST_MIPMAP_NEAREST:
      case GL_LINEAR_MIPMAP_NEAREST:
	 t->pp_txfilter |= RADEON_MIN_FILTER_ANISO_NEAREST_MIP_NEAREST;
	 break;
      case GL_NEAREST_MIPMAP_LINEAR:
      case GL_LINEAR_MIPMAP_LINEAR:
	 t->pp_txfilter |= RADEON_MIN_FILTER_ANISO_NEAREST_MIP_LINEAR;
	 break;
      }
   }

   switch ( magf ) {
   case GL_NEAREST:
      t->pp_txfilter |= RADEON_MAG_FILTER_NEAREST;
      break;
   case GL_LINEAR:
      t->pp_txfilter |= RADEON_MAG_FILTER_LINEAR;
      break;
   }
}

static void radeonSetTexBorderColor( radeonTexObjPtr t, GLubyte c[4] )
{
   t->pp_border_color = radeonPackColor( 4, c[0], c[1], c[2], c[3] );
}


/**
 * Allocate space for and load the mesa images into the texture memory block.
 * This will happen before drawing with a new texture, or drawing with a
 * texture after it was swapped out or teximaged again.
 */

static radeonTexObjPtr radeonAllocTexObj( struct gl_texture_object *texObj )
{
   radeonTexObjPtr t;

   t = CALLOC_STRUCT( radeon_tex_obj );
   texObj->DriverData = t;
   if ( t != NULL ) {
      if ( RADEON_DEBUG & DEBUG_TEXTURE ) {
	 fprintf( stderr, "%s( %p, %p )\n", __FUNCTION__, texObj, t );
      }

      /* Initialize non-image-dependent parts of the state:
       */
      t->base.tObj = texObj;
      t->border_fallback = GL_FALSE;

      t->pp_txfilter = RADEON_BORDER_MODE_OGL;
      t->pp_txformat = (RADEON_TXFORMAT_ENDIAN_NO_SWAP |
			RADEON_TXFORMAT_PERSPECTIVE_ENABLE);

      make_empty_list( & t->base );

      radeonSetTexWrap( t, texObj->WrapS, texObj->WrapT );
      radeonSetTexMaxAnisotropy( t, texObj->MaxAnisotropy );
      radeonSetTexFilter( t, texObj->MinFilter, texObj->MagFilter );
      radeonSetTexBorderColor( t, texObj->_BorderChan );
   }

   return t;
}


static const struct gl_texture_format *
radeonChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
                           GLenum format, GLenum type )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   const GLboolean do32bpt =
       ( rmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_32 );
   const GLboolean force16bpt =
       ( rmesa->texture_depth == DRI_CONF_TEXTURE_DEPTH_FORCE_16 );
   (void) format;

   switch ( internalFormat ) {
   case 4:
   case GL_RGBA:
   case GL_COMPRESSED_RGBA:
      switch ( type ) {
      case GL_UNSIGNED_INT_10_10_10_2:
      case GL_UNSIGNED_INT_2_10_10_10_REV:
	 return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb1555;
      case GL_UNSIGNED_SHORT_4_4_4_4:
      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
	 return &_mesa_texformat_argb4444;
      case GL_UNSIGNED_SHORT_5_5_5_1:
      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	 return &_mesa_texformat_argb1555;
      default:
         return do32bpt ? &_mesa_texformat_rgba8888 : &_mesa_texformat_argb4444;
      }

   case 3:
   case GL_RGB:
   case GL_COMPRESSED_RGB:
      switch ( type ) {
      case GL_UNSIGNED_SHORT_4_4_4_4:
      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
	 return &_mesa_texformat_argb4444;
      case GL_UNSIGNED_SHORT_5_5_5_1:
      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	 return &_mesa_texformat_argb1555;
      case GL_UNSIGNED_SHORT_5_6_5:
      case GL_UNSIGNED_SHORT_5_6_5_REV:
	 return &_mesa_texformat_rgb565;
      default:
         return do32bpt ? &_mesa_texformat_rgba8888 : &_mesa_texformat_rgb565;
      }

   case GL_RGBA8:
   case GL_RGB10_A2:
   case GL_RGBA12:
   case GL_RGBA16:
      return !force16bpt ?
	  &_mesa_texformat_rgba8888 : &_mesa_texformat_argb4444;

   case GL_RGBA4:
   case GL_RGBA2:
      return &_mesa_texformat_argb4444;

   case GL_RGB5_A1:
      return &_mesa_texformat_argb1555;

   case GL_RGB8:
   case GL_RGB10:
   case GL_RGB12:
   case GL_RGB16:
      return !force16bpt ? &_mesa_texformat_rgba8888 : &_mesa_texformat_rgb565;

   case GL_RGB5:
   case GL_RGB4:
   case GL_R3_G3_B2:
      return &_mesa_texformat_rgb565;

   case GL_ALPHA:
   case GL_ALPHA4:
   case GL_ALPHA8:
   case GL_ALPHA12:
   case GL_ALPHA16:
   case GL_COMPRESSED_ALPHA:
      return &_mesa_texformat_al88;

   case 1:
   case GL_LUMINANCE:
   case GL_LUMINANCE4:
   case GL_LUMINANCE8:
   case GL_LUMINANCE12:
   case GL_LUMINANCE16:
   case GL_COMPRESSED_LUMINANCE:
      return &_mesa_texformat_al88;

   case 2:
   case GL_LUMINANCE_ALPHA:
   case GL_LUMINANCE4_ALPHA4:
   case GL_LUMINANCE6_ALPHA2:
   case GL_LUMINANCE8_ALPHA8:
   case GL_LUMINANCE12_ALPHA4:
   case GL_LUMINANCE12_ALPHA12:
   case GL_LUMINANCE16_ALPHA16:
   case GL_COMPRESSED_LUMINANCE_ALPHA:
      return &_mesa_texformat_al88;

   case GL_INTENSITY:
   case GL_INTENSITY4:
   case GL_INTENSITY8:
   case GL_INTENSITY12:
   case GL_INTENSITY16:
   case GL_COMPRESSED_INTENSITY:
      return &_mesa_texformat_i8;

   case GL_YCBCR_MESA:
      if (type == GL_UNSIGNED_SHORT_8_8_APPLE ||
          type == GL_UNSIGNED_BYTE)
         return &_mesa_texformat_ycbcr;
      else
         return &_mesa_texformat_ycbcr_rev;

   default:
      _mesa_problem(ctx, "unexpected texture format in %s", __FUNCTION__);
      return NULL;
   }

   return NULL; /* never get here */
}


static void radeonTexImage1D( GLcontext *ctx, GLenum target, GLint level,
                              GLint internalFormat,
                              GLint width, GLint border,
                              GLenum format, GLenum type, const GLvoid *pixels,
                              const struct gl_pixelstore_attrib *packing,
                              struct gl_texture_object *texObj,
                              struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;

   if ( t ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) radeonAllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage1D");
         return;
      }
   }

   /* Note, this will call ChooseTextureFormat */
   _mesa_store_teximage1d(ctx, target, level, internalFormat,
                          width, border, format, type, pixels,
                          &ctx->Unpack, texObj, texImage);

   t->dirty_images[0] |= (1 << level);
}


static void radeonTexSubImage1D( GLcontext *ctx, GLenum target, GLint level,
                                 GLint xoffset,
                                 GLsizei width,
                                 GLenum format, GLenum type,
                                 const GLvoid *pixels,
                                 const struct gl_pixelstore_attrib *packing,
                                 struct gl_texture_object *texObj,
                                 struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;

   assert( t ); /* this _should_ be true */
   if ( t ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) radeonAllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage1D");
         return;
      }
   }

   _mesa_store_texsubimage1d(ctx, target, level, xoffset, width,
			     format, type, pixels, packing, texObj,
			     texImage);

   t->dirty_images[0] |= (1 << level);
}


static void radeonTexImage2D( GLcontext *ctx, GLenum target, GLint level,
                              GLint internalFormat,
                              GLint width, GLint height, GLint border,
                              GLenum format, GLenum type, const GLvoid *pixels,
                              const struct gl_pixelstore_attrib *packing,
                              struct gl_texture_object *texObj,
                              struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;
   GLuint face;

   /* which cube face or ordinary 2D image */
   switch (target) {
   case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
      face = (GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X;
      ASSERT(face < 6);
      break;
   default:
      face = 0;
   }

   if ( t != NULL ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) radeonAllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage2D");
         return;
      }
   }

   /* Note, this will call ChooseTextureFormat */
   _mesa_store_teximage2d(ctx, target, level, internalFormat,
                          width, height, border, format, type, pixels,
                          &ctx->Unpack, texObj, texImage);

   t->dirty_images[face] |= (1 << level);
}


static void radeonTexSubImage2D( GLcontext *ctx, GLenum target, GLint level,
                                 GLint xoffset, GLint yoffset,
                                 GLsizei width, GLsizei height,
                                 GLenum format, GLenum type,
                                 const GLvoid *pixels,
                                 const struct gl_pixelstore_attrib *packing,
                                 struct gl_texture_object *texObj,
                                 struct gl_texture_image *texImage )
{
   driTextureObject * t = (driTextureObject *) texObj->DriverData;
   GLuint face;

   /* which cube face or ordinary 2D image */
   switch (target) {
   case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
      face = (GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X;
      ASSERT(face < 6);
      break;
   default:
      face = 0;
   }

   assert( t ); /* this _should_ be true */
   if ( t ) {
      driSwapOutTextureObject( t );
   }
   else {
      t = (driTextureObject *) radeonAllocTexObj( texObj );
      if (!t) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexSubImage2D");
         return;
      }
   }

   _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
			     height, format, type, pixels, packing, texObj,
			     texImage);

   t->dirty_images[face] |= (1 << level);
}



#define SCALED_FLOAT_TO_BYTE( x, scale ) \
		(((GLuint)((255.0F / scale) * (x))) / 2)

static void radeonTexEnv( GLcontext *ctx, GLenum target,
			  GLenum pname, const GLfloat *param )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   GLuint unit = ctx->Texture.CurrentUnit;
   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];

   if ( RADEON_DEBUG & DEBUG_STATE ) {
      fprintf( stderr, "%s( %s )\n",
	       __FUNCTION__, _mesa_lookup_enum_by_nr( pname ) );
   }

   switch ( pname ) {
   case GL_TEXTURE_ENV_COLOR: {
      GLubyte c[4];
      GLuint envColor;
      UNCLAMPED_FLOAT_TO_RGBA_CHAN( c, texUnit->EnvColor );
      envColor = radeonPackColor( 4, c[0], c[1], c[2], c[3] );
      if ( rmesa->hw.tex[unit].cmd[TEX_PP_TFACTOR] != envColor ) {
	 RADEON_STATECHANGE( rmesa, tex[unit] );
	 rmesa->hw.tex[unit].cmd[TEX_PP_TFACTOR] = envColor;
      }
      break;
   }

   case GL_TEXTURE_LOD_BIAS_EXT: {
      GLfloat bias, min;
      GLuint b;

      /* The Radeon's LOD bias is a signed 2's complement value with a
       * range of -1.0 <= bias < 4.0.  We break this into two linear
       * functions, one mapping [-1.0,0.0] to [-128,0] and one mapping
       * [0.0,4.0] to [0,127].
       */
      min = driQueryOptionb (&rmesa->optionCache, "no_neg_lod_bias") ?
	  0.0 : -1.0;
      bias = CLAMP( *param, min, 4.0 );
      if ( bias == 0 ) {
	 b = 0;
      } else if ( bias > 0 ) {
	 b = ((GLuint)SCALED_FLOAT_TO_BYTE( bias, 4.0 )) << RADEON_LOD_BIAS_SHIFT;
      } else {
	 b = ((GLuint)SCALED_FLOAT_TO_BYTE( bias, 1.0 )) << RADEON_LOD_BIAS_SHIFT;
      }
      if ( (rmesa->hw.tex[unit].cmd[TEX_PP_TXFILTER] & RADEON_LOD_BIAS_MASK) != b ) {
	 RADEON_STATECHANGE( rmesa, tex[unit] );
	 rmesa->hw.tex[unit].cmd[TEX_PP_TXFILTER] &= ~RADEON_LOD_BIAS_MASK;
	 rmesa->hw.tex[unit].cmd[TEX_PP_TXFILTER] |= (b & RADEON_LOD_BIAS_MASK);
      }
      break;
   }

   default:
      return;
   }
}


/**
 * Changes variables and flags for a state update, which will happen at the
 * next UpdateTextureState
 */

static void radeonTexParameter( GLcontext *ctx, GLenum target,
				struct gl_texture_object *texObj,
				GLenum pname, const GLfloat *params )
{
   radeonTexObjPtr t = (radeonTexObjPtr) texObj->DriverData;

   if ( RADEON_DEBUG & (DEBUG_STATE|DEBUG_TEXTURE) ) {
      fprintf( stderr, "%s( %s )\n", __FUNCTION__,
	       _mesa_lookup_enum_by_nr( pname ) );
   }

   switch ( pname ) {
   case GL_TEXTURE_MIN_FILTER:
   case GL_TEXTURE_MAG_FILTER:
   case GL_TEXTURE_MAX_ANISOTROPY_EXT:
      radeonSetTexMaxAnisotropy( t, texObj->MaxAnisotropy );
      radeonSetTexFilter( t, texObj->MinFilter, texObj->MagFilter );
      break;

   case GL_TEXTURE_WRAP_S:
   case GL_TEXTURE_WRAP_T:
      radeonSetTexWrap( t, texObj->WrapS, texObj->WrapT );
      break;

   case GL_TEXTURE_BORDER_COLOR:
      radeonSetTexBorderColor( t, texObj->_BorderChan );
      break;

   case GL_TEXTURE_BASE_LEVEL:
   case GL_TEXTURE_MAX_LEVEL:
   case GL_TEXTURE_MIN_LOD:
   case GL_TEXTURE_MAX_LOD:
      /* This isn't the most efficient solution but there doesn't appear to
       * be a nice alternative.  Since there's no LOD clamping,
       * we just have to rely on loading the right subset of mipmap levels
       * to simulate a clamped LOD.
       */
      driSwapOutTextureObject( (driTextureObject *) t );
      break;

   default:
      return;
   }

   /* Mark this texobj as dirty (one bit per tex unit)
    */
   t->dirty_state = TEX_ALL;
}


static void radeonBindTexture( GLcontext *ctx, GLenum target,
			       struct gl_texture_object *texObj )
{
   if ( RADEON_DEBUG & (DEBUG_STATE|DEBUG_TEXTURE) ) {
      fprintf( stderr, "%s( %p ) unit=%d\n", __FUNCTION__, texObj,
	       ctx->Texture.CurrentUnit );
   }

   assert( (target != GL_TEXTURE_1D && target != GL_TEXTURE_2D &&
            target != GL_TEXTURE_RECTANGLE_NV) ||
           (texObj->DriverData != NULL) );
}


static void radeonDeleteTexture( GLcontext *ctx,
				 struct gl_texture_object *texObj )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   driTextureObject * t = (driTextureObject *) texObj->DriverData;

   if ( RADEON_DEBUG & (DEBUG_STATE|DEBUG_TEXTURE) ) {
      fprintf( stderr, "%s( %p (target = %s) )\n", __FUNCTION__, texObj,
	       _mesa_lookup_enum_by_nr( texObj->Target ) );
   }

   if ( t != NULL ) {
      if ( rmesa ) {
         RADEON_FIREVERTICES( rmesa );
      }

      driDestroyTextureObject( t );
   }

   /* Free mipmap images and the texture object itself */
   _mesa_delete_texture_object(ctx, texObj);
}

/* Need:  
 *  - Same GEN_MODE for all active bits
 *  - Same EyePlane/ObjPlane for all active bits when using Eye/Obj
 *  - STRQ presumably all supported (matrix means incoming R values
 *    can end up in STQ, this has implications for vertex support,
 *    presumably ok if maos is used, though?)
 *  
 * Basically impossible to do this on the fly - just collect some
 * basic info & do the checks from ValidateState().
 */
static void radeonTexGen( GLcontext *ctx,
			  GLenum coord,
			  GLenum pname,
			  const GLfloat *params )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   GLuint unit = ctx->Texture.CurrentUnit;
   rmesa->recheck_texgen[unit] = GL_TRUE;
}

/**
 * Allocate a new texture object.
 * Called via ctx->Driver.NewTextureObject.
 * Note: we could use containment here to 'derive' the driver-specific
 * texture object from the core mesa gl_texture_object.  Not done at this time.
 */
static struct gl_texture_object *
radeonNewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
{
   radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
   struct gl_texture_object *obj;
   obj = _mesa_new_texture_object(ctx, name, target);
   if (!obj)
      return NULL;
   obj->MaxAnisotropy = rmesa->initialMaxAnisotropy;
   radeonAllocTexObj( obj );
   return obj;
}


void radeonInitTextureFuncs( struct dd_function_table *functions )
{
   functions->ChooseTextureFormat	= radeonChooseTextureFormat;
   functions->TexImage1D		= radeonTexImage1D;
   functions->TexImage2D		= radeonTexImage2D;
   functions->TexSubImage1D		= radeonTexSubImage1D;
   functions->TexSubImage2D		= radeonTexSubImage2D;

   functions->NewTextureObject		= radeonNewTextureObject;
   functions->BindTexture		= radeonBindTexture;
   functions->DeleteTexture		= radeonDeleteTexture;
   functions->IsTextureResident		= driIsTextureResident;

   functions->TexEnv			= radeonTexEnv;
   functions->TexParameter		= radeonTexParameter;
   functions->TexGen			= radeonTexGen;
}