i915_state.c revision af69d88d 
1/**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/* Authors:  Keith Whitwell <keithw@vmware.com>
29 */
30
31
32#include "draw/draw_context.h"
33#include "util/u_helpers.h"
34#include "util/u_inlines.h"
35#include "util/u_math.h"
36#include "util/u_memory.h"
37#include "util/u_transfer.h"
38#include "tgsi/tgsi_parse.h"
39
40#include "i915_context.h"
41#include "i915_reg.h"
42#include "i915_state_inlines.h"
43#include "i915_fpc.h"
44#include "i915_resource.h"
45#include "i915_state.h"
46
47/* The i915 (and related graphics cores) do not support GL_CLAMP.  The
48 * Intel drivers for "other operating systems" implement GL_CLAMP as
49 * GL_CLAMP_TO_EDGE, so the same is done here.
50 */
51static unsigned
52translate_wrap_mode(unsigned wrap)
53{
54   switch (wrap) {
55   case PIPE_TEX_WRAP_REPEAT:
56      return TEXCOORDMODE_WRAP;
57   case PIPE_TEX_WRAP_CLAMP:
58      return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
59   case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
60      return TEXCOORDMODE_CLAMP_EDGE;
61   case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
62      return TEXCOORDMODE_CLAMP_BORDER;
63   case PIPE_TEX_WRAP_MIRROR_REPEAT:
64      return TEXCOORDMODE_MIRROR;
65   default:
66      return TEXCOORDMODE_WRAP;
67   }
68}
69
70static unsigned translate_img_filter( unsigned filter )
71{
72   switch (filter) {
73   case PIPE_TEX_FILTER_NEAREST:
74      return FILTER_NEAREST;
75   case PIPE_TEX_FILTER_LINEAR:
76      return FILTER_LINEAR;
77   default:
78      assert(0);
79      return FILTER_NEAREST;
80   }
81}
82
83static unsigned translate_mip_filter( unsigned filter )
84{
85   switch (filter) {
86   case PIPE_TEX_MIPFILTER_NONE:
87      return MIPFILTER_NONE;
88   case PIPE_TEX_MIPFILTER_NEAREST:
89      return MIPFILTER_NEAREST;
90   case PIPE_TEX_MIPFILTER_LINEAR:
91      return MIPFILTER_LINEAR;
92   default:
93      assert(0);
94      return MIPFILTER_NONE;
95   }
96}
97
98/* None of this state is actually used for anything yet.
99 */
100static void *
101i915_create_blend_state(struct pipe_context *pipe,
102                        const struct pipe_blend_state *blend)
103{
104   struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
105
106   {
107      unsigned eqRGB  = blend->rt[0].rgb_func;
108      unsigned srcRGB = blend->rt[0].rgb_src_factor;
109      unsigned dstRGB = blend->rt[0].rgb_dst_factor;
110
111      unsigned eqA    = blend->rt[0].alpha_func;
112      unsigned srcA   = blend->rt[0].alpha_src_factor;
113      unsigned dstA   = blend->rt[0].alpha_dst_factor;
114
115      /* Special handling for MIN/MAX filter modes handled at
116       * state_tracker level.
117       */
118
119      if (srcA != srcRGB ||
120          dstA != dstRGB ||
121          eqA != eqRGB) {
122
123         cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
124                          IAB_MODIFY_ENABLE |
125                          IAB_ENABLE |
126                          IAB_MODIFY_FUNC |
127                          IAB_MODIFY_SRC_FACTOR |
128                          IAB_MODIFY_DST_FACTOR |
129                          SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
130                          DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
131                          (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
132      }
133      else {
134         cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
135                          IAB_MODIFY_ENABLE |
136                          0);
137      }
138   }
139
140   cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
141                        ENABLE_LOGIC_OP_FUNC |
142                        LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
143
144   if (blend->logicop_enable)
145      cso_data->LIS5 |= S5_LOGICOP_ENABLE;
146
147   if (blend->dither)
148      cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
149
150   /* We potentially do some fixup at emission for non-BGRA targets */
151   if ((blend->rt[0].colormask & PIPE_MASK_R) == 0)
152      cso_data->LIS5 |= S5_WRITEDISABLE_RED;
153
154   if ((blend->rt[0].colormask & PIPE_MASK_G) == 0)
155      cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
156
157   if ((blend->rt[0].colormask & PIPE_MASK_B) == 0)
158      cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
159
160   if ((blend->rt[0].colormask & PIPE_MASK_A) == 0)
161      cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
162
163   if (blend->rt[0].blend_enable) {
164      unsigned funcRGB = blend->rt[0].rgb_func;
165      unsigned srcRGB  = blend->rt[0].rgb_src_factor;
166      unsigned dstRGB  = blend->rt[0].rgb_dst_factor;
167
168      cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
169                         SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
170                         DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
171                         (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
172   }
173
174   return cso_data;
175}
176
177static void i915_bind_blend_state(struct pipe_context *pipe,
178                                  void *blend)
179{
180   struct i915_context *i915 = i915_context(pipe);
181
182   if (i915->blend == blend)
183      return;
184
185   i915->blend = (struct i915_blend_state*)blend;
186
187   i915->dirty |= I915_NEW_BLEND;
188}
189
190
191static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
192{
193   FREE(blend);
194}
195
196static void i915_set_blend_color( struct pipe_context *pipe,
197                                  const struct pipe_blend_color *blend_color )
198{
199   struct i915_context *i915 = i915_context(pipe);
200
201   if (!blend_color)
202      return;
203
204   i915->blend_color = *blend_color;
205
206   i915->dirty |= I915_NEW_BLEND;
207}
208
209static void i915_set_stencil_ref( struct pipe_context *pipe,
210                                  const struct pipe_stencil_ref *stencil_ref )
211{
212   struct i915_context *i915 = i915_context(pipe);
213
214   i915->stencil_ref = *stencil_ref;
215
216   i915->dirty |= I915_NEW_DEPTH_STENCIL;
217}
218
219static void *
220i915_create_sampler_state(struct pipe_context *pipe,
221                          const struct pipe_sampler_state *sampler)
222{
223   struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
224   const unsigned ws = sampler->wrap_s;
225   const unsigned wt = sampler->wrap_t;
226   const unsigned wr = sampler->wrap_r;
227   unsigned minFilt, magFilt;
228   unsigned mipFilt;
229
230   cso->templ = *sampler;
231
232   mipFilt = translate_mip_filter(sampler->min_mip_filter);
233   minFilt = translate_img_filter( sampler->min_img_filter );
234   magFilt = translate_img_filter( sampler->mag_img_filter );
235
236   if (sampler->max_anisotropy > 1)
237      minFilt = magFilt = FILTER_ANISOTROPIC;
238
239   if (sampler->max_anisotropy > 2) {
240      cso->state[0] |= SS2_MAX_ANISO_4;
241   }
242
243   {
244      int b = (int) (sampler->lod_bias * 16.0);
245      b = CLAMP(b, -256, 255);
246      cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
247   }
248
249   /* Shadow:
250    */
251   if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
252   {
253      cso->state[0] |= (SS2_SHADOW_ENABLE |
254                        i915_translate_shadow_compare_func(sampler->compare_func));
255
256      minFilt = FILTER_4X4_FLAT;
257      magFilt = FILTER_4X4_FLAT;
258   }
259
260   cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
261                     (mipFilt << SS2_MIP_FILTER_SHIFT) |
262                     (magFilt << SS2_MAG_FILTER_SHIFT));
263
264   cso->state[1] |=
265      ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
266       (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
267       (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
268
269   if (sampler->normalized_coords)
270      cso->state[1] |= SS3_NORMALIZED_COORDS;
271
272   {
273      int minlod = (int) (16.0 * sampler->min_lod);
274      int maxlod = (int) (16.0 * sampler->max_lod);
275      minlod = CLAMP(minlod, 0, 16 * 11);
276      maxlod = CLAMP(maxlod, 0, 16 * 11);
277
278      if (minlod > maxlod)
279         maxlod = minlod;
280
281      cso->minlod = minlod;
282      cso->maxlod = maxlod;
283   }
284
285   {
286      ubyte r = float_to_ubyte(sampler->border_color.f[0]);
287      ubyte g = float_to_ubyte(sampler->border_color.f[1]);
288      ubyte b = float_to_ubyte(sampler->border_color.f[2]);
289      ubyte a = float_to_ubyte(sampler->border_color.f[3]);
290      cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
291   }
292   return cso;
293}
294
295static void
296i915_bind_vertex_sampler_states(struct pipe_context *pipe,
297                                unsigned start,
298                                unsigned num,
299                                void **samplers)
300{
301   struct i915_context *i915 = i915_context(pipe);
302   unsigned i;
303
304   assert(start + num <= Elements(i915->vertex_samplers));
305
306   /* Check for no-op */
307   if (num == i915->num_vertex_samplers &&
308       !memcmp(i915->vertex_samplers + start, samplers,
309	       num * sizeof(void *)))
310      return;
311
312   for (i = 0; i < num; ++i)
313      i915->vertex_samplers[i + start] = samplers[i];
314
315   /* find highest non-null samplers[] entry */
316   {
317      unsigned j = MAX2(i915->num_vertex_samplers, start + num);
318      while (j > 0 && i915->vertex_samplers[j - 1] == NULL)
319         j--;
320      i915->num_vertex_samplers = j;
321   }
322
323   draw_set_samplers(i915->draw,
324                     PIPE_SHADER_VERTEX,
325                     i915->vertex_samplers,
326                     i915->num_vertex_samplers);
327}
328
329
330
331static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
332                                              unsigned start,
333                                              unsigned num,
334                                              void **samplers)
335{
336   struct i915_context *i915 = i915_context(pipe);
337   unsigned i;
338
339   /* Check for no-op */
340   if (num == i915->num_samplers &&
341       !memcmp(i915->fragment_sampler + start, samplers,
342               num * sizeof(void *)))
343      return;
344
345   for (i = 0; i < num; ++i)
346      i915->fragment_sampler[i + start] = samplers[i];
347
348   /* find highest non-null samplers[] entry */
349   {
350      unsigned j = MAX2(i915->num_samplers, start + num);
351      while (j > 0 && i915->fragment_sampler[j - 1] == NULL)
352         j--;
353      i915->num_samplers = j;
354   }
355
356   i915->dirty |= I915_NEW_SAMPLER;
357}
358
359
360static void
361i915_bind_sampler_states(struct pipe_context *pipe, unsigned shader,
362                         unsigned start, unsigned num_samplers,
363                         void **samplers)
364{
365   switch (shader) {
366   case PIPE_SHADER_VERTEX:
367      i915_bind_vertex_sampler_states(pipe, start, num_samplers, samplers);
368      break;
369   case PIPE_SHADER_FRAGMENT:
370      i915_bind_fragment_sampler_states(pipe, start, num_samplers, samplers);
371      break;
372   default:
373      ;
374   }
375}
376
377
378static void i915_delete_sampler_state(struct pipe_context *pipe,
379                                      void *sampler)
380{
381   FREE(sampler);
382}
383
384
385/**
386 * Called before drawing VBO to map vertex samplers and hand them to draw
387 */
388void
389i915_prepare_vertex_sampling(struct i915_context *i915)
390{
391   struct i915_winsys *iws = i915->iws;
392   unsigned i,j;
393   uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
394   uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
395   uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
396   unsigned num = i915->num_vertex_sampler_views;
397   struct pipe_sampler_view **views = i915->vertex_sampler_views;
398
399   assert(num <= PIPE_MAX_SAMPLERS);
400   if (!num)
401      return;
402
403   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
404      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
405
406      if (view) {
407         struct pipe_resource *tex = view->texture;
408         struct i915_texture *i915_tex = i915_texture(tex);
409         ubyte *addr;
410
411         /* We're referencing the texture's internal data, so save a
412          * reference to it.
413          */
414         pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
415
416         i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
417         addr = iws->buffer_map(iws,
418                                i915_tex->buffer,
419                                FALSE /* read only */);
420
421         /* Setup array of mipmap level pointers */
422         /* FIXME: handle 3D textures? */
423         for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
424            mip_offsets[j] = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
425            row_stride[j] = i915_tex->stride;
426            img_stride[j] = 0; /* FIXME */;
427         }
428
429         draw_set_mapped_texture(i915->draw,
430                                 PIPE_SHADER_VERTEX,
431                                 i,
432                                 tex->width0, tex->height0, tex->depth0,
433                                 view->u.tex.first_level, tex->last_level,
434                                 addr,
435                                 row_stride, img_stride, mip_offsets);
436      } else
437         i915->mapped_vs_tex[i] = NULL;
438   }
439}
440
441void
442i915_cleanup_vertex_sampling(struct i915_context *i915)
443{
444   struct i915_winsys *iws = i915->iws;
445   unsigned i;
446   for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
447      if (i915->mapped_vs_tex_buffer[i]) {
448         iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
449         pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
450      }
451   }
452}
453
454
455
456/** XXX move someday?  Or consolidate all these simple state setters
457 * into one file.
458 */
459
460static void *
461i915_create_depth_stencil_state(struct pipe_context *pipe,
462				const struct pipe_depth_stencil_alpha_state *depth_stencil)
463{
464   struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
465
466   {
467      int testmask = depth_stencil->stencil[0].valuemask & 0xff;
468      int writemask = depth_stencil->stencil[0].writemask & 0xff;
469
470      cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
471                              ENABLE_STENCIL_TEST_MASK |
472                              STENCIL_TEST_MASK(testmask) |
473                              ENABLE_STENCIL_WRITE_MASK |
474                              STENCIL_WRITE_MASK(writemask));
475   }
476
477   if (depth_stencil->stencil[0].enabled) {
478      int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
479      int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
480      int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
481      int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
482
483      cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
484                            S5_STENCIL_WRITE_ENABLE |
485                            (test << S5_STENCIL_TEST_FUNC_SHIFT) |
486                            (fop  << S5_STENCIL_FAIL_SHIFT) |
487                            (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
488                            (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
489   }
490
491   if (depth_stencil->stencil[1].enabled) {
492      int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
493      int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
494      int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
495      int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
496      int tmask = depth_stencil->stencil[1].valuemask & 0xff;
497      int wmask = depth_stencil->stencil[1].writemask & 0xff;
498
499      cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
500                     BFO_ENABLE_STENCIL_FUNCS |
501                     BFO_ENABLE_STENCIL_TWO_SIDE |
502                     BFO_ENABLE_STENCIL_REF |
503                     BFO_STENCIL_TWO_SIDE |
504                     (test << BFO_STENCIL_TEST_SHIFT) |
505                     (fop  << BFO_STENCIL_FAIL_SHIFT) |
506                     (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
507                     (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
508
509      cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
510                     BFM_ENABLE_STENCIL_TEST_MASK |
511                     BFM_ENABLE_STENCIL_WRITE_MASK |
512                     (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
513                     (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
514   }
515   else {
516      /* This actually disables two-side stencil: The bit set is a
517       * modify-enable bit to indicate we are changing the two-side
518       * setting.  Then there is a symbolic zero to show that we are
519       * setting the flag to zero/off.
520       */
521      cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
522                     BFO_ENABLE_STENCIL_TWO_SIDE |
523                     0);
524      cso->bfo[1] = 0;
525   }
526
527   if (depth_stencil->depth.enabled) {
528      int func = i915_translate_compare_func(depth_stencil->depth.func);
529
530      cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
531                          (func << S6_DEPTH_TEST_FUNC_SHIFT));
532
533      if (depth_stencil->depth.writemask)
534         cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
535   }
536
537   if (depth_stencil->alpha.enabled) {
538      int test = i915_translate_compare_func(depth_stencil->alpha.func);
539      ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
540
541      cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
542			  (test << S6_ALPHA_TEST_FUNC_SHIFT) |
543			  (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
544   }
545
546   return cso;
547}
548
549static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
550                                          void *depth_stencil)
551{
552   struct i915_context *i915 = i915_context(pipe);
553
554   if (i915->depth_stencil == depth_stencil)
555      return;
556
557   i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
558
559   i915->dirty |= I915_NEW_DEPTH_STENCIL;
560}
561
562static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
563                                            void *depth_stencil)
564{
565   FREE(depth_stencil);
566}
567
568
569static void i915_set_scissor_states( struct pipe_context *pipe,
570                                     unsigned start_slot,
571                                     unsigned num_scissors,
572                                 const struct pipe_scissor_state *scissor )
573{
574   struct i915_context *i915 = i915_context(pipe);
575
576   memcpy( &i915->scissor, scissor, sizeof(*scissor) );
577   i915->dirty |= I915_NEW_SCISSOR;
578}
579
580
581static void i915_set_polygon_stipple( struct pipe_context *pipe,
582                                   const struct pipe_poly_stipple *stipple )
583{
584}
585
586
587
588static void *
589i915_create_fs_state(struct pipe_context *pipe,
590                     const struct pipe_shader_state *templ)
591{
592   struct i915_context *i915 = i915_context(pipe);
593   struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
594   if (!ifs)
595      return NULL;
596
597   ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
598   ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
599
600   tgsi_scan_shader(templ->tokens, &ifs->info);
601
602   /* The shader's compiled to i915 instructions here */
603   i915_translate_fragment_program(i915, ifs);
604
605   return ifs;
606}
607
608static void
609i915_bind_fs_state(struct pipe_context *pipe, void *shader)
610{
611   struct i915_context *i915 = i915_context(pipe);
612
613   if (i915->fs == shader)
614      return;
615
616   i915->fs = (struct i915_fragment_shader*) shader;
617
618   draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
619
620   i915->dirty |= I915_NEW_FS;
621}
622
623static
624void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
625{
626   struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
627
628   FREE(ifs->decl);
629   ifs->decl = NULL;
630
631   if (ifs->program) {
632      FREE(ifs->program);
633      ifs->program = NULL;
634      FREE((struct tgsi_token *)ifs->state.tokens);
635      ifs->state.tokens = NULL;
636   }
637
638   ifs->program_len = 0;
639   ifs->decl_len = 0;
640
641   FREE(ifs);
642}
643
644
645static void *
646i915_create_vs_state(struct pipe_context *pipe,
647                     const struct pipe_shader_state *templ)
648{
649   struct i915_context *i915 = i915_context(pipe);
650
651   /* just pass-through to draw module */
652   return draw_create_vertex_shader(i915->draw, templ);
653}
654
655static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
656{
657   struct i915_context *i915 = i915_context(pipe);
658
659   if (i915->vs == shader)
660      return;
661
662   i915->vs = shader;
663
664   /* just pass-through to draw module */
665   draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
666
667   i915->dirty |= I915_NEW_VS;
668}
669
670static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
671{
672   struct i915_context *i915 = i915_context(pipe);
673
674   /* just pass-through to draw module */
675   draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
676}
677
678static void i915_set_constant_buffer(struct pipe_context *pipe,
679                                     uint shader, uint index,
680                                     struct pipe_constant_buffer *cb)
681{
682   struct i915_context *i915 = i915_context(pipe);
683   struct pipe_resource *buf = cb ? cb->buffer : NULL;
684   unsigned new_num = 0;
685   boolean diff = TRUE;
686
687   /* XXX don't support geom shaders now */
688   if (shader == PIPE_SHADER_GEOMETRY)
689      return;
690
691   if (cb && cb->user_buffer) {
692      buf = i915_user_buffer_create(pipe->screen, (void *) cb->user_buffer,
693                                    cb->buffer_size,
694                                    PIPE_BIND_CONSTANT_BUFFER);
695   }
696
697   /* if we have a new buffer compare it with the old one */
698   if (buf) {
699      struct i915_buffer *ibuf = i915_buffer(buf);
700      struct pipe_resource *old_buf = i915->constants[shader];
701      struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
702      unsigned old_num = i915->current.num_user_constants[shader];
703
704      new_num = ibuf->b.b.width0 / 4 * sizeof(float);
705
706      if (old_num == new_num) {
707         if (old_num == 0)
708            diff = FALSE;
709#if 0
710         /* XXX no point in running this code since st/mesa only uses user buffers */
711         /* Can't compare the buffer data since they are userbuffers */
712         else if (old && old->free_on_destroy)
713            diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
714#else
715         (void)old;
716#endif
717      }
718   } else {
719      diff = i915->current.num_user_constants[shader] != 0;
720   }
721
722   pipe_resource_reference(&i915->constants[shader], buf);
723   i915->current.num_user_constants[shader] = new_num;
724
725   if (diff)
726      i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
727
728   if (cb && cb->user_buffer) {
729      pipe_resource_reference(&buf, NULL);
730   }
731}
732
733
734static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
735                                            unsigned num,
736                                            struct pipe_sampler_view **views)
737{
738   struct i915_context *i915 = i915_context(pipe);
739   uint i;
740
741   assert(num <= PIPE_MAX_SAMPLERS);
742
743   /* Check for no-op */
744   if (num == i915->num_fragment_sampler_views &&
745       !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
746      return;
747
748   for (i = 0; i < num; i++) {
749      /* Note: we're using pipe_sampler_view_release() here to work around
750       * a possible crash when the old view belongs to another context that
751       * was already destroyed.
752       */
753      pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
754      pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
755                                  views[i]);
756   }
757
758   for (i = num; i < i915->num_fragment_sampler_views; i++)
759      pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
760
761   i915->num_fragment_sampler_views = num;
762
763   i915->dirty |= I915_NEW_SAMPLER_VIEW;
764}
765
766static void
767i915_set_vertex_sampler_views(struct pipe_context *pipe,
768                              unsigned num,
769                              struct pipe_sampler_view **views)
770{
771   struct i915_context *i915 = i915_context(pipe);
772   uint i;
773
774   assert(num <= Elements(i915->vertex_sampler_views));
775
776   /* Check for no-op */
777   if (num == i915->num_vertex_sampler_views &&
778       !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
779      return;
780   }
781
782   for (i = 0; i < Elements(i915->vertex_sampler_views); i++) {
783      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
784
785      pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
786   }
787
788   i915->num_vertex_sampler_views = num;
789
790   draw_set_sampler_views(i915->draw,
791                          PIPE_SHADER_VERTEX,
792                          i915->vertex_sampler_views,
793                          i915->num_vertex_sampler_views);
794}
795
796
797static void
798i915_set_sampler_views(struct pipe_context *pipe, unsigned shader,
799                       unsigned start, unsigned num,
800                       struct pipe_sampler_view **views)
801{
802   assert(start == 0);
803   switch (shader) {
804   case PIPE_SHADER_FRAGMENT:
805      i915_set_fragment_sampler_views(pipe, num, views);
806      break;
807   case PIPE_SHADER_VERTEX:
808      i915_set_vertex_sampler_views(pipe, num, views);
809      break;
810   default:
811      ;
812   }
813}
814
815
816struct pipe_sampler_view *
817i915_create_sampler_view_custom(struct pipe_context *pipe,
818                                struct pipe_resource *texture,
819                                const struct pipe_sampler_view *templ,
820                                unsigned width0,
821                                unsigned height0)
822{
823   struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
824
825   if (view) {
826      *view = *templ;
827      view->reference.count = 1;
828      view->texture = NULL;
829      pipe_resource_reference(&view->texture, texture);
830      view->context = pipe;
831   }
832
833   return view;
834}
835
836static struct pipe_sampler_view *
837i915_create_sampler_view(struct pipe_context *pipe,
838                         struct pipe_resource *texture,
839                         const struct pipe_sampler_view *templ)
840{
841   struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
842
843   if (view) {
844      *view = *templ;
845      view->reference.count = 1;
846      view->texture = NULL;
847      pipe_resource_reference(&view->texture, texture);
848      view->context = pipe;
849   }
850
851   return view;
852}
853
854
855static void
856i915_sampler_view_destroy(struct pipe_context *pipe,
857                          struct pipe_sampler_view *view)
858{
859   pipe_resource_reference(&view->texture, NULL);
860   FREE(view);
861}
862
863
864static void i915_set_framebuffer_state(struct pipe_context *pipe,
865				       const struct pipe_framebuffer_state *fb)
866{
867   struct i915_context *i915 = i915_context(pipe);
868   int i;
869
870   i915->framebuffer.width = fb->width;
871   i915->framebuffer.height = fb->height;
872   i915->framebuffer.nr_cbufs = fb->nr_cbufs;
873   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
874      pipe_surface_reference(&i915->framebuffer.cbufs[i],
875                             i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
876   }
877   pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
878
879   i915->dirty |= I915_NEW_FRAMEBUFFER;
880}
881
882
883
884static void i915_set_clip_state( struct pipe_context *pipe,
885			     const struct pipe_clip_state *clip )
886{
887   struct i915_context *i915 = i915_context(pipe);
888
889   i915->clip = *clip;
890
891   draw_set_clip_state(i915->draw, clip);
892
893   i915->dirty |= I915_NEW_CLIP;
894}
895
896
897
898/* Called when driver state tracker notices changes to the viewport
899 * matrix:
900 */
901static void i915_set_viewport_states( struct pipe_context *pipe,
902                                      unsigned start_slot,
903                                      unsigned num_viewports,
904				     const struct pipe_viewport_state *viewport )
905{
906   struct i915_context *i915 = i915_context(pipe);
907
908   i915->viewport = *viewport; /* struct copy */
909
910   /* pass the viewport info to the draw module */
911   draw_set_viewport_states(i915->draw, start_slot, num_viewports,
912                            &i915->viewport);
913
914   i915->dirty |= I915_NEW_VIEWPORT;
915}
916
917
918static void *
919i915_create_rasterizer_state(struct pipe_context *pipe,
920                             const struct pipe_rasterizer_state *rasterizer)
921{
922   struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
923
924   cso->templ = *rasterizer;
925   cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
926   cso->light_twoside = rasterizer->light_twoside;
927   cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
928   cso->ds[1].f = rasterizer->offset_scale;
929   if (rasterizer->poly_stipple_enable) {
930      cso->st |= ST1_ENABLE;
931   }
932
933   if (rasterizer->scissor)
934      cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
935   else
936      cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
937
938   switch (rasterizer->cull_face) {
939   case PIPE_FACE_NONE:
940      cso->LIS4 |= S4_CULLMODE_NONE;
941      break;
942   case PIPE_FACE_FRONT:
943      if (rasterizer->front_ccw)
944         cso->LIS4 |= S4_CULLMODE_CCW;
945      else
946         cso->LIS4 |= S4_CULLMODE_CW;
947      break;
948   case PIPE_FACE_BACK:
949      if (rasterizer->front_ccw)
950         cso->LIS4 |= S4_CULLMODE_CW;
951      else
952         cso->LIS4 |= S4_CULLMODE_CCW;
953      break;
954   case PIPE_FACE_FRONT_AND_BACK:
955      cso->LIS4 |= S4_CULLMODE_BOTH;
956      break;
957   }
958
959   {
960      int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
961
962      cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
963
964      if (rasterizer->line_smooth)
965	 cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
966   }
967
968   {
969      int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
970
971      cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
972   }
973
974   if (rasterizer->flatshade) {
975      cso->LIS4 |= (S4_FLATSHADE_ALPHA |
976                    S4_FLATSHADE_COLOR |
977                    S4_FLATSHADE_SPECULAR);
978   }
979
980   cso->LIS7 = fui( rasterizer->offset_units );
981
982
983   return cso;
984}
985
986static void i915_bind_rasterizer_state( struct pipe_context *pipe,
987                                        void *raster )
988{
989   struct i915_context *i915 = i915_context(pipe);
990
991   if (i915->rasterizer == raster)
992      return;
993
994   i915->rasterizer = (struct i915_rasterizer_state *)raster;
995
996   /* pass-through to draw module */
997   draw_set_rasterizer_state(i915->draw,
998                           (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
999                           raster);
1000
1001   i915->dirty |= I915_NEW_RASTERIZER;
1002}
1003
1004static void i915_delete_rasterizer_state(struct pipe_context *pipe,
1005                                         void *raster)
1006{
1007   FREE(raster);
1008}
1009
1010static void i915_set_vertex_buffers(struct pipe_context *pipe,
1011                                    unsigned start_slot, unsigned count,
1012                                    const struct pipe_vertex_buffer *buffers)
1013{
1014   struct i915_context *i915 = i915_context(pipe);
1015   struct draw_context *draw = i915->draw;
1016
1017   util_set_vertex_buffers_count(i915->vertex_buffers,
1018                                 &i915->nr_vertex_buffers,
1019                                 buffers, start_slot, count);
1020
1021   /* pass-through to draw module */
1022   draw_set_vertex_buffers(draw, start_slot, count, buffers);
1023}
1024
1025static void *
1026i915_create_vertex_elements_state(struct pipe_context *pipe,
1027                                  unsigned count,
1028                                  const struct pipe_vertex_element *attribs)
1029{
1030   struct i915_velems_state *velems;
1031   assert(count <= PIPE_MAX_ATTRIBS);
1032   velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
1033   if (velems) {
1034      velems->count = count;
1035      memcpy(velems->velem, attribs, sizeof(*attribs) * count);
1036   }
1037   return velems;
1038}
1039
1040static void
1041i915_bind_vertex_elements_state(struct pipe_context *pipe,
1042                                void *velems)
1043{
1044   struct i915_context *i915 = i915_context(pipe);
1045   struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1046
1047   if (i915->velems == velems)
1048      return;
1049
1050   i915->velems = velems;
1051
1052   /* pass-through to draw module */
1053   if (i915_velems) {
1054      draw_set_vertex_elements(i915->draw,
1055            i915_velems->count, i915_velems->velem);
1056   }
1057}
1058
1059static void
1060i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
1061{
1062   FREE( velems );
1063}
1064
1065static void i915_set_index_buffer(struct pipe_context *pipe,
1066                                  const struct pipe_index_buffer *ib)
1067{
1068   struct i915_context *i915 = i915_context(pipe);
1069
1070   if (ib)
1071      memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1072   else
1073      memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1074}
1075
1076static void
1077i915_set_sample_mask(struct pipe_context *pipe,
1078                     unsigned sample_mask)
1079{
1080}
1081
1082void
1083i915_init_state_functions( struct i915_context *i915 )
1084{
1085   i915->base.create_blend_state = i915_create_blend_state;
1086   i915->base.bind_blend_state = i915_bind_blend_state;
1087   i915->base.delete_blend_state = i915_delete_blend_state;
1088
1089   i915->base.create_sampler_state = i915_create_sampler_state;
1090   i915->base.bind_sampler_states = i915_bind_sampler_states;
1091   i915->base.delete_sampler_state = i915_delete_sampler_state;
1092
1093   i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1094   i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1095   i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1096
1097   i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1098   i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1099   i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1100   i915->base.create_fs_state = i915_create_fs_state;
1101   i915->base.bind_fs_state = i915_bind_fs_state;
1102   i915->base.delete_fs_state = i915_delete_fs_state;
1103   i915->base.create_vs_state = i915_create_vs_state;
1104   i915->base.bind_vs_state = i915_bind_vs_state;
1105   i915->base.delete_vs_state = i915_delete_vs_state;
1106   i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1107   i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1108   i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1109
1110   i915->base.set_blend_color = i915_set_blend_color;
1111   i915->base.set_stencil_ref = i915_set_stencil_ref;
1112   i915->base.set_clip_state = i915_set_clip_state;
1113   i915->base.set_sample_mask = i915_set_sample_mask;
1114   i915->base.set_constant_buffer = i915_set_constant_buffer;
1115   i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1116
1117   i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1118   i915->base.set_scissor_states = i915_set_scissor_states;
1119   i915->base.set_sampler_views = i915_set_sampler_views;
1120   i915->base.create_sampler_view = i915_create_sampler_view;
1121   i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1122   i915->base.set_viewport_states = i915_set_viewport_states;
1123   i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1124   i915->base.set_index_buffer = i915_set_index_buffer;
1125}
1126