summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/r300/r300_state.c
blob: eae1a5698d005dfd77f75dd2a0c754906d677666 (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
/*
 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
 *
 * 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
 * on 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
 * THE AUTHOR(S) AND/OR THEIR 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 "util/u_math.h"
#include "util/u_pack_color.h"

#include "pipe/p_debug.h"
#include "pipe/internal/p_winsys_screen.h"

#include "r300_context.h"
#include "r300_reg.h"
#include "r300_state_shader.h"

/* r300_state: Functions used to intialize state context by translating
 * Gallium state objects into semi-native r300 state objects.
 *
 * XXX break this file up into pieces if it gets too big! */

/* Pack a float into a dword. */
static uint32_t pack_float_32(float f)
{
    union {
        float f;
        uint32_t u;
    } u;

    u.f = f;
    return u.u;
}

static uint32_t translate_blend_function(int blend_func) {
    switch (blend_func) {
        case PIPE_BLEND_ADD:
            return R300_COMB_FCN_ADD_CLAMP;
        case PIPE_BLEND_SUBTRACT:
            return R300_COMB_FCN_SUB_CLAMP;
        case PIPE_BLEND_REVERSE_SUBTRACT:
            return R300_COMB_FCN_RSUB_CLAMP;
        case PIPE_BLEND_MIN:
            return R300_COMB_FCN_MIN;
        case PIPE_BLEND_MAX:
            return R300_COMB_FCN_MAX;
        default:
            debug_printf("r300: Unknown blend function %d\n", blend_func);
            break;
    }
    return 0;
}

/* XXX we can also offer the D3D versions of some of these... */
static uint32_t translate_blend_factor(int blend_fact) {
    switch (blend_fact) {
        case PIPE_BLENDFACTOR_ONE:
            return R300_BLEND_GL_ONE;
        case PIPE_BLENDFACTOR_SRC_COLOR:
            return R300_BLEND_GL_SRC_COLOR;
        case PIPE_BLENDFACTOR_SRC_ALPHA:
            return R300_BLEND_GL_SRC_ALPHA;
        case PIPE_BLENDFACTOR_DST_ALPHA:
            return R300_BLEND_GL_DST_ALPHA;
        case PIPE_BLENDFACTOR_DST_COLOR:
            return R300_BLEND_GL_DST_COLOR;
        case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
            return R300_BLEND_GL_SRC_ALPHA_SATURATE;
        case PIPE_BLENDFACTOR_CONST_COLOR:
            return R300_BLEND_GL_CONST_COLOR;
        case PIPE_BLENDFACTOR_CONST_ALPHA:
            return R300_BLEND_GL_CONST_ALPHA;
        /* XXX WTF are these?
        case PIPE_BLENDFACTOR_SRC1_COLOR:
        case PIPE_BLENDFACTOR_SRC1_ALPHA: */
        case PIPE_BLENDFACTOR_ZERO:
            return R300_BLEND_GL_ZERO;
        case PIPE_BLENDFACTOR_INV_SRC_COLOR:
            return R300_BLEND_GL_ONE_MINUS_SRC_COLOR;
        case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
            return R300_BLEND_GL_ONE_MINUS_SRC_ALPHA;
        case PIPE_BLENDFACTOR_INV_DST_ALPHA:
            return R300_BLEND_GL_ONE_MINUS_DST_ALPHA;
        case PIPE_BLENDFACTOR_INV_DST_COLOR:
            return R300_BLEND_GL_ONE_MINUS_DST_COLOR;
        case PIPE_BLENDFACTOR_INV_CONST_COLOR:
            return R300_BLEND_GL_ONE_MINUS_CONST_COLOR;
        case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
            return R300_BLEND_GL_ONE_MINUS_CONST_ALPHA;
        /* XXX see above
        case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
        case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: */
        default:
            debug_printf("r300: Unknown blend factor %d\n", blend_fact);
            break;
    }
    return 0;
}

/* Create a new blend state based on the CSO blend state.
 *
 * This encompasses alpha blending, logic/raster ops, and blend dithering. */
static void* r300_create_blend_state(struct pipe_context* pipe,
                                     const struct pipe_blend_state* state)
{
    struct r300_blend_state* blend = CALLOC_STRUCT(r300_blend_state);

    if (state->blend_enable) {
        /* XXX for now, always do separate alpha...
         * is it faster to do it with one reg? */
        blend->blend_control = R300_ALPHA_BLEND_ENABLE |
                R300_SEPARATE_ALPHA_ENABLE |
                R300_READ_ENABLE |
                translate_blend_function(state->rgb_func) |
                (translate_blend_factor(state->rgb_src_factor) <<
                    R300_SRC_BLEND_SHIFT) |
                (translate_blend_factor(state->rgb_dst_factor) <<
                    R300_DST_BLEND_SHIFT);
        blend->alpha_blend_control =
                translate_blend_function(state->alpha_func) |
                (translate_blend_factor(state->alpha_src_factor) <<
                    R300_SRC_BLEND_SHIFT) |
                (translate_blend_factor(state->alpha_dst_factor) <<
                    R300_DST_BLEND_SHIFT);
    }

    /* PIPE_LOGICOP_* don't need to be translated, fortunately. */
    /* XXX are logicops still allowed if blending's disabled?
     * Does Gallium take care of it for us? */
    if (state->logicop_enable) {
        blend->rop = R300_RB3D_ROPCNTL_ROP_ENABLE |
                (state->logicop_func) << R300_RB3D_ROPCNTL_ROP_SHIFT;
    }

    if (state->dither) {
        blend->dither = R300_RB3D_DITHER_CTL_DITHER_MODE_LUT |
                R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT;
    }

    return (void*)blend;
}

/* Bind blend state. */
static void r300_bind_blend_state(struct pipe_context* pipe,
                                  void* state)
{
    struct r300_context* r300 = r300_context(pipe);

    r300->blend_state = (struct r300_blend_state*)state;
    r300->dirty_state |= R300_NEW_BLEND;
}

/* Free blend state. */
static void r300_delete_blend_state(struct pipe_context* pipe,
                                    void* state)
{
    FREE(state);
}

/* Set blend color.
 * Setup both R300 and R500 registers, figure out later which one to write. */
static void r300_set_blend_color(struct pipe_context* pipe,
                                 const struct pipe_blend_color* color)
{
    struct r300_context* r300 = r300_context(pipe);
    uint32_t r, g, b, a;
    ubyte ur, ug, ub, ua;

    r = util_iround(color->color[0] * 1023.0f);
    g = util_iround(color->color[1] * 1023.0f);
    b = util_iround(color->color[2] * 1023.0f);
    a = util_iround(color->color[3] * 1023.0f);

    ur = float_to_ubyte(color->color[0]);
    ug = float_to_ubyte(color->color[1]);
    ub = float_to_ubyte(color->color[2]);
    ua = float_to_ubyte(color->color[3]);

    r300->blend_color_state->blend_color = (a << 24) | (r << 16) | (g << 8) | b;

    r300->blend_color_state->blend_color_red_alpha = ur | (ua << 16);
    r300->blend_color_state->blend_color_green_blue = ub | (ug << 16);

    r300->dirty_state |= R300_NEW_BLEND_COLOR;
}

static void r300_set_clip_state(struct pipe_context* pipe,
                                const struct pipe_clip_state* state)
{
    struct r300_context* r300 = r300_context(pipe);
    /* XXX Draw */
    draw_flush(r300->draw);
    draw_set_clip_state(r300->draw, state);
}

static void
    r300_set_constant_buffer(struct pipe_context* pipe,
                             uint shader, uint index,
                             const struct pipe_constant_buffer* buffer)
{
    struct r300_context* r300 = r300_context(pipe);

    /* This entire chunk of code seems ever-so-slightly baked.
     * It's as if I've got pipe_buffer* matryoshkas... */
    if (buffer && buffer->buffer && buffer->buffer->size) {
        void* map = pipe->winsys->buffer_map(pipe->winsys, buffer->buffer,
                                             PIPE_BUFFER_USAGE_CPU_READ);
        memcpy(r300->shader_constants[shader].constants,
            map, buffer->buffer->size);
        pipe->winsys->buffer_unmap(pipe->winsys, buffer->buffer);

        r300->shader_constants[shader].user_count =
            buffer->buffer->size / (sizeof(float) * 4);
    } else {
        r300->shader_constants[shader].user_count = 0;
    }

    r300->dirty_state |= R300_NEW_CONSTANTS;
}

static uint32_t translate_depth_stencil_function(int zs_func) {
    switch (zs_func) {
        case PIPE_FUNC_NEVER:
            return R300_ZS_NEVER;
        case PIPE_FUNC_LESS:
            return R300_ZS_LESS;
        case PIPE_FUNC_EQUAL:
            return R300_ZS_EQUAL;
        case PIPE_FUNC_LEQUAL:
            return R300_ZS_LEQUAL;
        case PIPE_FUNC_GREATER:
            return R300_ZS_GREATER;
        case PIPE_FUNC_NOTEQUAL:
            return R300_ZS_NOTEQUAL;
        case PIPE_FUNC_GEQUAL:
            return R300_ZS_GEQUAL;
        case PIPE_FUNC_ALWAYS:
            return R300_ZS_ALWAYS;
        default:
            debug_printf("r300: Unknown depth/stencil function %d\n",
                zs_func);
            break;
    }
    return 0;
}

static uint32_t translate_stencil_op(int s_op) {
    switch (s_op) {
        case PIPE_STENCIL_OP_KEEP:
            return R300_ZS_KEEP;
        case PIPE_STENCIL_OP_ZERO:
            return R300_ZS_ZERO;
        case PIPE_STENCIL_OP_REPLACE:
            return R300_ZS_REPLACE;
        case PIPE_STENCIL_OP_INCR:
            return R300_ZS_INCR;
        case PIPE_STENCIL_OP_DECR:
            return R300_ZS_DECR;
        case PIPE_STENCIL_OP_INCR_WRAP:
            return R300_ZS_INCR_WRAP;
        case PIPE_STENCIL_OP_DECR_WRAP:
            return R300_ZS_DECR_WRAP;
        case PIPE_STENCIL_OP_INVERT:
            return R300_ZS_INVERT;
        default:
            debug_printf("r300: Unknown stencil op %d", s_op);
            break;
    }
    return 0;
}

static uint32_t translate_alpha_function(int alpha_func) {
    switch (alpha_func) {
        case PIPE_FUNC_NEVER:
            return R300_FG_ALPHA_FUNC_NEVER;
        case PIPE_FUNC_LESS:
            return R300_FG_ALPHA_FUNC_LESS;
        case PIPE_FUNC_EQUAL:
            return R300_FG_ALPHA_FUNC_EQUAL;
        case PIPE_FUNC_LEQUAL:
            return R300_FG_ALPHA_FUNC_LE;
        case PIPE_FUNC_GREATER:
            return R300_FG_ALPHA_FUNC_GREATER;
        case PIPE_FUNC_NOTEQUAL:
            return R300_FG_ALPHA_FUNC_NOTEQUAL;
        case PIPE_FUNC_GEQUAL:
            return R300_FG_ALPHA_FUNC_GE;
        case PIPE_FUNC_ALWAYS:
            return R300_FG_ALPHA_FUNC_ALWAYS;
        default:
            debug_printf("r300: Unknown alpha function %d", alpha_func);
            break;
    }
    return 0;
}

/* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 *
 * This contains the depth buffer, stencil buffer, alpha test, and such.
 * On the Radeon, depth and stencil buffer setup are intertwined, which is
 * the reason for some of the strange-looking assignments across registers. */
static void*
        r300_create_dsa_state(struct pipe_context* pipe,
                              const struct pipe_depth_stencil_alpha_state* state)
{
    struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);

    /* Depth test setup. */
    if (state->depth.enabled) {
        dsa->z_buffer_control |= R300_Z_ENABLE;

        if (state->depth.writemask) {
            dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
        }

        dsa->z_stencil_control |=
            (translate_depth_stencil_function(state->depth.func) <<
                R300_Z_FUNC_SHIFT);
    }

    /* Stencil buffer setup. */
    if (state->stencil[0].enabled) {
        dsa->z_buffer_control |= R300_STENCIL_ENABLE;
        dsa->z_stencil_control |=
                (translate_depth_stencil_function(state->stencil[0].func) <<
                    R300_S_FRONT_FUNC_SHIFT) |
                (translate_stencil_op(state->stencil[0].fail_op) <<
                    R300_S_FRONT_SFAIL_OP_SHIFT) |
                (translate_stencil_op(state->stencil[0].zpass_op) <<
                    R300_S_FRONT_ZPASS_OP_SHIFT) |
                (translate_stencil_op(state->stencil[0].zfail_op) <<
                    R300_S_FRONT_ZFAIL_OP_SHIFT);

        dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
                (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
                (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);

        if (state->stencil[1].enabled) {
            dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
            dsa->z_stencil_control |=
                (translate_depth_stencil_function(state->stencil[1].func) <<
                    R300_S_BACK_FUNC_SHIFT) |
                (translate_stencil_op(state->stencil[1].fail_op) <<
                    R300_S_BACK_SFAIL_OP_SHIFT) |
                (translate_stencil_op(state->stencil[1].zpass_op) <<
                    R300_S_BACK_ZPASS_OP_SHIFT) |
                (translate_stencil_op(state->stencil[1].zfail_op) <<
                    R300_S_BACK_ZFAIL_OP_SHIFT);

            dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
                (state->stencil[1].valuemask << R300_STENCILMASK_SHIFT) |
                (state->stencil[1].writemask << R300_STENCILWRITEMASK_SHIFT);
        }
    }

    /* Alpha test setup. */
    if (state->alpha.enabled) {
        dsa->alpha_function = translate_alpha_function(state->alpha.func) |
            R300_FG_ALPHA_FUNC_ENABLE;
        dsa->alpha_reference = CLAMP(state->alpha.ref_value * 1023.0f,
                                     0, 1023);
    } else {
        dsa->z_buffer_top = R300_ZTOP_ENABLE;
    }

    return (void*)dsa;
}

/* Bind DSA state. */
static void r300_bind_dsa_state(struct pipe_context* pipe,
                                void* state)
{
    struct r300_context* r300 = r300_context(pipe);

    r300->dsa_state = (struct r300_dsa_state*)state;
    r300->dirty_state |= R300_NEW_DSA;
}

/* Free DSA state. */
static void r300_delete_dsa_state(struct pipe_context* pipe,
                                  void* state)
{
    FREE(state);
}

static void r300_set_edgeflags(struct pipe_context* pipe,
                               const unsigned* bitfield)
{
    /* XXX you know it's bad when i915 has this blank too */
}

static void
    r300_set_framebuffer_state(struct pipe_context* pipe,
                               const struct pipe_framebuffer_state* state)
{
    struct r300_context* r300 = r300_context(pipe);

    draw_flush(r300->draw);

    r300->framebuffer_state = *state;

    r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
}

/* Create fragment shader state. */
static void* r300_create_fs_state(struct pipe_context* pipe,
                                  const struct pipe_shader_state* shader)
{
    struct r300_context* r300 = r300_context(pipe);
    struct r3xx_fragment_shader* fs = NULL;

    if (r300_screen(r300->context.screen)->caps->is_r500) {
        fs =
            (struct r3xx_fragment_shader*)CALLOC_STRUCT(r500_fragment_shader);
    } else {
        fs =
            (struct r3xx_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
    }

    /* Copy state directly into shader. */
    fs->state = *shader;

    return (void*)fs;
}

/* Bind fragment shader state. */
static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
{
    struct r300_context* r300 = r300_context(pipe);
    struct r3xx_fragment_shader* fs = (struct r3xx_fragment_shader*)shader;

    if (fs == NULL) {
        r300->fs = NULL;
        return;
    } else if (!fs->translated) {
        if (r300_screen(r300->context.screen)->caps->is_r500) {
            r500_translate_fragment_shader(r300, (struct r500_fragment_shader*)fs);
        } else {
            r300_translate_fragment_shader(r300, (struct r300_fragment_shader*)fs);
        }
    }

    fs->translated = true;
    r300->fs = fs;

    r300->dirty_state |= R300_NEW_FRAGMENT_SHADER;
}

/* Delete fragment shader state. */
static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
{
    FREE(shader);
}

static void r300_set_polygon_stipple(struct pipe_context* pipe,
                                     const struct pipe_poly_stipple* state)
{
    /* XXX */
}

static INLINE int pack_float_16_6x(float f) {
    return ((int)(f * 6.0) & 0xffff);
}

/* Create a new rasterizer state based on the CSO rasterizer state.
 *
 * This is a very large chunk of state, and covers most of the graphics
 * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 *
 * In a not entirely unironic sidenote, this state has nearly nothing to do
 * with the actual block on the Radeon called the rasterizer (RS). */
static void* r300_create_rs_state(struct pipe_context* pipe,
                                  const struct pipe_rasterizer_state* state)
{
    struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);

    /* XXX this is part of HW TCL */
    /* XXX endian control */
    rs->vap_control_status = R300_VAP_TCL_BYPASS;

    rs->point_size = pack_float_16_6x(state->point_size) |
        (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);

    rs->line_control = pack_float_16_6x(state->line_width) |
        R300_GA_LINE_CNTL_END_TYPE_COMP;

    /* Radeons don't think in "CW/CCW", they think in "front/back". */
    if (state->front_winding == PIPE_WINDING_CW) {
        rs->cull_mode = R300_FRONT_FACE_CW;

        if (state->offset_cw) {
            rs->polygon_offset_enable |= R300_FRONT_ENABLE;
        }
        if (state->offset_ccw) {
            rs->polygon_offset_enable |= R300_BACK_ENABLE;
        }
    } else {
        rs->cull_mode = R300_FRONT_FACE_CCW;

        if (state->offset_ccw) {
            rs->polygon_offset_enable |= R300_FRONT_ENABLE;
        }
        if (state->offset_cw) {
            rs->polygon_offset_enable |= R300_BACK_ENABLE;
        }
    }
    if (state->front_winding & state->cull_mode) {
        rs->cull_mode |= R300_CULL_FRONT;
    }
    if (~(state->front_winding) & state->cull_mode) {
        rs->cull_mode |= R300_CULL_BACK;
    }

    if (rs->polygon_offset_enable) {
        rs->depth_offset_front = rs->depth_offset_back =
                pack_float_32(state->offset_units);
        rs->depth_scale_front = rs->depth_scale_back =
                pack_float_32(state->offset_scale);
    }

    if (state->line_stipple_enable) {
        rs->line_stipple_config =
            R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
            (pack_float_32((float)state->line_stipple_factor) &
                R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
        /* XXX this might need to be scaled up */
        rs->line_stipple_value = state->line_stipple_pattern;
    }

    rs->rs = *state;

    return (void*)rs;
}

/* Bind rasterizer state. */
static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
{
    struct r300_context* r300 = r300_context(pipe);
    struct r300_rs_state* rs = (struct r300_rs_state*)state;

    draw_set_rasterizer_state(r300->draw, &rs->rs);

    r300->rs_state = rs;
    r300->dirty_state |= R300_NEW_RASTERIZER;
}

/* Free rasterizer state. */
static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
{
    FREE(state);
}

static uint32_t translate_wrap(int wrap) {
    switch (wrap) {
        case PIPE_TEX_WRAP_REPEAT:
            return R300_TX_REPEAT;
        case PIPE_TEX_WRAP_CLAMP:
            return R300_TX_CLAMP;
        case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
            return R300_TX_CLAMP_TO_EDGE;
        case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
            return R300_TX_CLAMP_TO_BORDER;
        case PIPE_TEX_WRAP_MIRROR_REPEAT:
            return R300_TX_REPEAT | R300_TX_MIRRORED;
        case PIPE_TEX_WRAP_MIRROR_CLAMP:
            return R300_TX_CLAMP | R300_TX_MIRRORED;
        case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
            return R300_TX_CLAMP_TO_EDGE | R300_TX_MIRRORED;
        case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
            return R300_TX_CLAMP_TO_EDGE | R300_TX_MIRRORED;
        default:
            debug_printf("r300: Unknown texture wrap %d", wrap);
            return 0;
    }
}

static uint32_t translate_tex_filters(int min, int mag, int mip) {
    uint32_t retval = 0;
    switch (min) {
        case PIPE_TEX_FILTER_NEAREST:
            retval |= R300_TX_MIN_FILTER_NEAREST;
        case PIPE_TEX_FILTER_LINEAR:
            retval |= R300_TX_MIN_FILTER_LINEAR;
        case PIPE_TEX_FILTER_ANISO:
            retval |= R300_TX_MIN_FILTER_ANISO;
        default:
            debug_printf("r300: Unknown texture filter %d", min);
            break;
    }
    switch (mag) {
        case PIPE_TEX_FILTER_NEAREST:
            retval |= R300_TX_MAG_FILTER_NEAREST;
        case PIPE_TEX_FILTER_LINEAR:
            retval |= R300_TX_MAG_FILTER_LINEAR;
        case PIPE_TEX_FILTER_ANISO:
            retval |= R300_TX_MAG_FILTER_ANISO;
        default:
            debug_printf("r300: Unknown texture filter %d", mag);
            break;
    }
    switch (mip) {
        case PIPE_TEX_MIPFILTER_NONE:
            retval |= R300_TX_MIN_FILTER_MIP_NONE;
        case PIPE_TEX_MIPFILTER_NEAREST:
            retval |= R300_TX_MIN_FILTER_MIP_NEAREST;
        case PIPE_TEX_MIPFILTER_LINEAR:
            retval |= R300_TX_MIN_FILTER_MIP_LINEAR;
        default:
            debug_printf("r300: Unknown texture filter %d", mip);
            break;
    }

    return retval;
}

static uint32_t anisotropy(float max_aniso) {
    if (max_aniso >= 16.0f) {
        return R300_TX_MAX_ANISO_16_TO_1;
    } else if (max_aniso >= 8.0f) {
        return R300_TX_MAX_ANISO_8_TO_1;
    } else if (max_aniso >= 4.0f) {
        return R300_TX_MAX_ANISO_4_TO_1;
    } else if (max_aniso >= 2.0f) {
        return R300_TX_MAX_ANISO_2_TO_1;
    } else {
        return R300_TX_MAX_ANISO_1_TO_1;
    }
}

static void*
        r300_create_sampler_state(struct pipe_context* pipe,
                                  const struct pipe_sampler_state* state)
{
    struct r300_context* r300 = r300_context(pipe);
    struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
    int lod_bias;

    sampler->filter0 |=
        (translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
        (translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
        (translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);

    sampler->filter0 |= translate_tex_filters(state->min_img_filter,
                                              state->mag_img_filter,
                                              state->min_mip_filter);

    lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);

    sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;

    sampler->filter1 |= anisotropy(state->max_anisotropy);

    util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM,
                    &sampler->border_color);

    /* R500-specific fixups and optimizations */
    if (r300_screen(r300->context.screen)->caps->is_r500) {
        sampler->filter1 |= R500_BORDER_FIX;
    }

    return (void*)sampler;
}

static void r300_bind_sampler_states(struct pipe_context* pipe,
                                     unsigned count,
                                     void** states)
{
    struct r300_context* r300 = r300_context(pipe);
    int i;

    if (count > 8) {
        return;
    }

    for (i = 0; i < count; i++) {
        if (r300->sampler_states[i] != states[i]) {
            r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
            r300->dirty_state |= (R300_NEW_SAMPLER << i);
        }
    }

    r300->sampler_count = count;
}

static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
{
    FREE(state);
}

static void r300_set_sampler_textures(struct pipe_context* pipe,
                                      unsigned count,
                                      struct pipe_texture** texture)
{
    struct r300_context* r300 = r300_context(pipe);
    int i;

    /* XXX magic num */
    if (count > 8) {
        return;
    }

    for (i = 0; i < count; i++) {
        if (r300->textures[i] != (struct r300_texture*)texture[i]) {
            pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
                texture[i]);
            r300->dirty_state |= (R300_NEW_TEXTURE << i);
        }
    }

    for (i = count; i < 8; i++) {
        if (r300->textures[i]) {
            pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
                NULL);
            r300->dirty_state |= (R300_NEW_TEXTURE << i);
        }
    }

    r300->texture_count = count;
}

static void r300_set_scissor_state(struct pipe_context* pipe,
                                   const struct pipe_scissor_state* state)
{
    struct r300_context* r300 = r300_context(pipe);
    draw_flush(r300->draw);

    r300->scissor_state->scissor_top_left =
        (state->minx << R300_SCISSORS_X_SHIFT) |
        (state->miny << R300_SCISSORS_Y_SHIFT);
    r300->scissor_state->scissor_bottom_right =
        (state->maxx << R300_SCISSORS_X_SHIFT) |
        (state->maxy << R300_SCISSORS_Y_SHIFT);

    r300->dirty_state |= R300_NEW_SCISSOR;
}

static void r300_set_viewport_state(struct pipe_context* pipe,
                                    const struct pipe_viewport_state* state)
{
    struct r300_context* r300 = r300_context(pipe);
    /* XXX handing this off to Draw for now */
    draw_set_viewport_state(r300->draw, state);
}

static void r300_set_vertex_buffers(struct pipe_context* pipe,
                                    unsigned count,
                                    const struct pipe_vertex_buffer* buffers)
{
    struct r300_context* r300 = r300_context(pipe);

    memcpy(r300->vertex_buffers, buffers,
        sizeof(struct pipe_vertex_buffer) * count);

    r300->vertex_buffer_count = count;

    draw_flush(r300->draw);
    draw_set_vertex_buffers(r300->draw, count, buffers);
}

static void r300_set_vertex_elements(struct pipe_context* pipe,
                                    unsigned count,
                                    const struct pipe_vertex_element* elements)
{
    struct r300_context* r300 = r300_context(pipe);
    /* XXX Draw */
    draw_flush(r300->draw);
    draw_set_vertex_elements(r300->draw, count, elements);
}

static void* r300_create_vs_state(struct pipe_context* pipe,
                                  const struct pipe_shader_state* state)
{
    struct r300_context* context = r300_context(pipe);
    /* XXX handing this off to Draw for now */
    return draw_create_vertex_shader(context->draw, state);
}

static void r300_bind_vs_state(struct pipe_context* pipe, void* state) {
    struct r300_context* context = r300_context(pipe);
    /* XXX handing this off to Draw for now */
    draw_bind_vertex_shader(context->draw, (struct draw_vertex_shader*)state);
}

static void r300_delete_vs_state(struct pipe_context* pipe, void* state)
{
    struct r300_context* context = r300_context(pipe);
    /* XXX handing this off to Draw for now */
    draw_delete_vertex_shader(context->draw, (struct draw_vertex_shader*)state);
}

void r300_init_state_functions(struct r300_context* r300)
{
    r300->context.create_blend_state = r300_create_blend_state;
    r300->context.bind_blend_state = r300_bind_blend_state;
    r300->context.delete_blend_state = r300_delete_blend_state;

    r300->context.set_blend_color = r300_set_blend_color;

    r300->context.set_clip_state = r300_set_clip_state;

    r300->context.set_constant_buffer = r300_set_constant_buffer;

    r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
    r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
    r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;

    r300->context.set_edgeflags = r300_set_edgeflags;

    r300->context.set_framebuffer_state = r300_set_framebuffer_state;

    r300->context.create_fs_state = r300_create_fs_state;
    r300->context.bind_fs_state = r300_bind_fs_state;
    r300->context.delete_fs_state = r300_delete_fs_state;

    r300->context.set_polygon_stipple = r300_set_polygon_stipple;

    r300->context.create_rasterizer_state = r300_create_rs_state;
    r300->context.bind_rasterizer_state = r300_bind_rs_state;
    r300->context.delete_rasterizer_state = r300_delete_rs_state;

    r300->context.create_sampler_state = r300_create_sampler_state;
    r300->context.bind_sampler_states = r300_bind_sampler_states;
    r300->context.delete_sampler_state = r300_delete_sampler_state;

    r300->context.set_sampler_textures = r300_set_sampler_textures;

    r300->context.set_scissor_state = r300_set_scissor_state;

    r300->context.set_viewport_state = r300_set_viewport_state;

    r300->context.set_vertex_buffers = r300_set_vertex_buffers;
    r300->context.set_vertex_elements = r300_set_vertex_elements;

    r300->context.create_vs_state = r300_create_vs_state;
    r300->context.bind_vs_state = r300_bind_vs_state;
    r300->context.delete_vs_state = r300_delete_vs_state;
}