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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  */
51 static unsigned
translate_wrap_mode(unsigned wrap)52 translate_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 
translate_img_filter(unsigned filter)70 static 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 
translate_mip_filter(unsigned filter)83 static 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  */
100 static void *
i915_create_blend_state(struct pipe_context * pipe,const struct pipe_blend_state * blend)101 i915_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 
i915_bind_blend_state(struct pipe_context * pipe,void * blend)177 static 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 
i915_delete_blend_state(struct pipe_context * pipe,void * blend)191 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
192 {
193    FREE(blend);
194 }
195 
i915_set_blend_color(struct pipe_context * pipe,const struct pipe_blend_color * blend_color)196 static 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 
i915_set_stencil_ref(struct pipe_context * pipe,const struct pipe_stencil_ref * stencil_ref)209 static 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 
219 static void *
i915_create_sampler_state(struct pipe_context * pipe,const struct pipe_sampler_state * sampler)220 i915_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 
295 static void
i915_bind_vertex_sampler_states(struct pipe_context * pipe,unsigned start,unsigned num,void ** samplers)296 i915_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 <= ARRAY_SIZE(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 
i915_bind_fragment_sampler_states(struct pipe_context * pipe,unsigned start,unsigned num,void ** samplers)331 static 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 
360 static void
i915_bind_sampler_states(struct pipe_context * pipe,enum pipe_shader_type shader,unsigned start,unsigned num_samplers,void ** samplers)361 i915_bind_sampler_states(struct pipe_context *pipe,
362                          enum pipe_shader_type shader,
363                          unsigned start, unsigned num_samplers,
364                          void **samplers)
365 {
366    switch (shader) {
367    case PIPE_SHADER_VERTEX:
368       i915_bind_vertex_sampler_states(pipe, start, num_samplers, samplers);
369       break;
370    case PIPE_SHADER_FRAGMENT:
371       i915_bind_fragment_sampler_states(pipe, start, num_samplers, samplers);
372       break;
373    default:
374       ;
375    }
376 }
377 
378 
i915_delete_sampler_state(struct pipe_context * pipe,void * sampler)379 static void i915_delete_sampler_state(struct pipe_context *pipe,
380                                       void *sampler)
381 {
382    FREE(sampler);
383 }
384 
385 
386 /**
387  * Called before drawing VBO to map vertex samplers and hand them to draw
388  */
389 void
i915_prepare_vertex_sampling(struct i915_context * i915)390 i915_prepare_vertex_sampling(struct i915_context *i915)
391 {
392    struct i915_winsys *iws = i915->iws;
393    unsigned i,j;
394    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
395    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
396    uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
397    unsigned num = i915->num_vertex_sampler_views;
398    struct pipe_sampler_view **views = i915->vertex_sampler_views;
399 
400    assert(num <= PIPE_MAX_SAMPLERS);
401    if (!num)
402       return;
403 
404    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
405       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
406 
407       if (view) {
408          struct pipe_resource *tex = view->texture;
409          struct i915_texture *i915_tex = i915_texture(tex);
410          ubyte *addr;
411 
412          /* We're referencing the texture's internal data, so save a
413           * reference to it.
414           */
415          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
416 
417          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
418          addr = iws->buffer_map(iws,
419                                 i915_tex->buffer,
420                                 FALSE /* read only */);
421 
422          /* Setup array of mipmap level pointers */
423          /* FIXME: handle 3D textures? */
424          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
425             mip_offsets[j] = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
426             row_stride[j] = i915_tex->stride;
427             img_stride[j] = 0; /* FIXME */
428          }
429 
430          draw_set_mapped_texture(i915->draw,
431                                  PIPE_SHADER_VERTEX,
432                                  i,
433                                  tex->width0, tex->height0, tex->depth0,
434                                  view->u.tex.first_level, tex->last_level,
435                                  addr,
436                                  row_stride, img_stride, mip_offsets);
437       } else
438          i915->mapped_vs_tex[i] = NULL;
439    }
440 }
441 
442 void
i915_cleanup_vertex_sampling(struct i915_context * i915)443 i915_cleanup_vertex_sampling(struct i915_context *i915)
444 {
445    struct i915_winsys *iws = i915->iws;
446    unsigned i;
447    for (i = 0; i < ARRAY_SIZE(i915->mapped_vs_tex); i++) {
448       if (i915->mapped_vs_tex_buffer[i]) {
449          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
450          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
451       }
452    }
453 }
454 
455 
456 
457 /** XXX move someday?  Or consolidate all these simple state setters
458  * into one file.
459  */
460 
461 static void *
i915_create_depth_stencil_state(struct pipe_context * pipe,const struct pipe_depth_stencil_alpha_state * depth_stencil)462 i915_create_depth_stencil_state(struct pipe_context *pipe,
463 				const struct pipe_depth_stencil_alpha_state *depth_stencil)
464 {
465    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
466 
467    {
468       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
469       int writemask = depth_stencil->stencil[0].writemask & 0xff;
470 
471       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
472                               ENABLE_STENCIL_TEST_MASK |
473                               STENCIL_TEST_MASK(testmask) |
474                               ENABLE_STENCIL_WRITE_MASK |
475                               STENCIL_WRITE_MASK(writemask));
476    }
477 
478    if (depth_stencil->stencil[0].enabled) {
479       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
480       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
481       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
482       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
483 
484       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
485                             S5_STENCIL_WRITE_ENABLE |
486                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
487                             (fop  << S5_STENCIL_FAIL_SHIFT) |
488                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
489                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
490    }
491 
492    if (depth_stencil->stencil[1].enabled) {
493       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
494       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
495       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
496       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
497       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
498       int wmask = depth_stencil->stencil[1].writemask & 0xff;
499 
500       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
501                      BFO_ENABLE_STENCIL_FUNCS |
502                      BFO_ENABLE_STENCIL_TWO_SIDE |
503                      BFO_ENABLE_STENCIL_REF |
504                      BFO_STENCIL_TWO_SIDE |
505                      (test << BFO_STENCIL_TEST_SHIFT) |
506                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
507                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
508                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
509 
510       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
511                      BFM_ENABLE_STENCIL_TEST_MASK |
512                      BFM_ENABLE_STENCIL_WRITE_MASK |
513                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
514                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
515    }
516    else {
517       /* This actually disables two-side stencil: The bit set is a
518        * modify-enable bit to indicate we are changing the two-side
519        * setting.  Then there is a symbolic zero to show that we are
520        * setting the flag to zero/off.
521        */
522       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
523                      BFO_ENABLE_STENCIL_TWO_SIDE |
524                      0);
525       cso->bfo[1] = 0;
526    }
527 
528    if (depth_stencil->depth.enabled) {
529       int func = i915_translate_compare_func(depth_stencil->depth.func);
530 
531       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
532                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
533 
534       if (depth_stencil->depth.writemask)
535          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
536    }
537 
538    if (depth_stencil->alpha.enabled) {
539       int test = i915_translate_compare_func(depth_stencil->alpha.func);
540       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
541 
542       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
543 			  (test << S6_ALPHA_TEST_FUNC_SHIFT) |
544 			  (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
545    }
546 
547    return cso;
548 }
549 
i915_bind_depth_stencil_state(struct pipe_context * pipe,void * depth_stencil)550 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
551                                           void *depth_stencil)
552 {
553    struct i915_context *i915 = i915_context(pipe);
554 
555    if (i915->depth_stencil == depth_stencil)
556       return;
557 
558    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
559 
560    i915->dirty |= I915_NEW_DEPTH_STENCIL;
561 }
562 
i915_delete_depth_stencil_state(struct pipe_context * pipe,void * depth_stencil)563 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
564                                             void *depth_stencil)
565 {
566    FREE(depth_stencil);
567 }
568 
569 
i915_set_scissor_states(struct pipe_context * pipe,unsigned start_slot,unsigned num_scissors,const struct pipe_scissor_state * scissor)570 static void i915_set_scissor_states( struct pipe_context *pipe,
571                                      unsigned start_slot,
572                                      unsigned num_scissors,
573                                  const struct pipe_scissor_state *scissor )
574 {
575    struct i915_context *i915 = i915_context(pipe);
576 
577    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
578    i915->dirty |= I915_NEW_SCISSOR;
579 }
580 
581 
i915_set_polygon_stipple(struct pipe_context * pipe,const struct pipe_poly_stipple * stipple)582 static void i915_set_polygon_stipple( struct pipe_context *pipe,
583                                    const struct pipe_poly_stipple *stipple )
584 {
585 }
586 
587 
588 
589 static void *
i915_create_fs_state(struct pipe_context * pipe,const struct pipe_shader_state * templ)590 i915_create_fs_state(struct pipe_context *pipe,
591                      const struct pipe_shader_state *templ)
592 {
593    struct i915_context *i915 = i915_context(pipe);
594    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
595    if (!ifs)
596       return NULL;
597 
598    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
599    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
600 
601    tgsi_scan_shader(templ->tokens, &ifs->info);
602 
603    /* The shader's compiled to i915 instructions here */
604    i915_translate_fragment_program(i915, ifs);
605 
606    return ifs;
607 }
608 
609 static void
i915_bind_fs_state(struct pipe_context * pipe,void * shader)610 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
611 {
612    struct i915_context *i915 = i915_context(pipe);
613 
614    if (i915->fs == shader)
615       return;
616 
617    i915->fs = (struct i915_fragment_shader*) shader;
618 
619    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
620 
621    i915->dirty |= I915_NEW_FS;
622 }
623 
624 static
i915_delete_fs_state(struct pipe_context * pipe,void * shader)625 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
626 {
627    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
628 
629    FREE(ifs->decl);
630    ifs->decl = NULL;
631 
632    FREE(ifs->program);
633    ifs->program = NULL;
634    FREE((struct tgsi_token *)ifs->state.tokens);
635    ifs->state.tokens = NULL;
636 
637    ifs->program_len = 0;
638    ifs->decl_len = 0;
639 
640    FREE(ifs);
641 }
642 
643 
644 static void *
i915_create_vs_state(struct pipe_context * pipe,const struct pipe_shader_state * templ)645 i915_create_vs_state(struct pipe_context *pipe,
646                      const struct pipe_shader_state *templ)
647 {
648    struct i915_context *i915 = i915_context(pipe);
649 
650    /* just pass-through to draw module */
651    return draw_create_vertex_shader(i915->draw, templ);
652 }
653 
i915_bind_vs_state(struct pipe_context * pipe,void * shader)654 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
655 {
656    struct i915_context *i915 = i915_context(pipe);
657 
658    if (i915->vs == shader)
659       return;
660 
661    i915->vs = shader;
662 
663    /* just pass-through to draw module */
664    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
665 
666    i915->dirty |= I915_NEW_VS;
667 }
668 
i915_delete_vs_state(struct pipe_context * pipe,void * shader)669 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
670 {
671    struct i915_context *i915 = i915_context(pipe);
672 
673    /* just pass-through to draw module */
674    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
675 }
676 
i915_set_constant_buffer(struct pipe_context * pipe,uint shader,uint index,const struct pipe_constant_buffer * cb)677 static void i915_set_constant_buffer(struct pipe_context *pipe,
678                                      uint shader, uint index,
679                                      const struct pipe_constant_buffer *cb)
680 {
681    struct i915_context *i915 = i915_context(pipe);
682    struct pipe_resource *buf = cb ? cb->buffer : NULL;
683    unsigned new_num = 0;
684    boolean diff = TRUE;
685 
686    /* XXX don't support geom shaders now */
687    if (shader == PIPE_SHADER_GEOMETRY)
688       return;
689 
690    if (cb && cb->user_buffer) {
691       buf = i915_user_buffer_create(pipe->screen, (void *) cb->user_buffer,
692                                     cb->buffer_size,
693                                     PIPE_BIND_CONSTANT_BUFFER);
694    }
695 
696    /* if we have a new buffer compare it with the old one */
697    if (buf) {
698       struct i915_buffer *ibuf = i915_buffer(buf);
699       struct pipe_resource *old_buf = i915->constants[shader];
700       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
701       unsigned old_num = i915->current.num_user_constants[shader];
702 
703       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
704 
705       if (old_num == new_num) {
706          if (old_num == 0)
707             diff = FALSE;
708 #if 0
709          /* XXX no point in running this code since st/mesa only uses user buffers */
710          /* Can't compare the buffer data since they are userbuffers */
711          else if (old && old->free_on_destroy)
712             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
713 #else
714          (void)old;
715 #endif
716       }
717    } else {
718       diff = i915->current.num_user_constants[shader] != 0;
719    }
720 
721    pipe_resource_reference(&i915->constants[shader], buf);
722    i915->current.num_user_constants[shader] = new_num;
723 
724    if (diff)
725       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
726 
727    if (cb && cb->user_buffer) {
728       pipe_resource_reference(&buf, NULL);
729    }
730 }
731 
732 
i915_set_fragment_sampler_views(struct pipe_context * pipe,unsigned num,struct pipe_sampler_view ** views)733 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
734                                             unsigned num,
735                                             struct pipe_sampler_view **views)
736 {
737    struct i915_context *i915 = i915_context(pipe);
738    uint i;
739 
740    assert(num <= PIPE_MAX_SAMPLERS);
741 
742    /* Check for no-op */
743    if (num == i915->num_fragment_sampler_views &&
744        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
745       return;
746 
747    for (i = 0; i < num; i++) {
748       /* Note: we're using pipe_sampler_view_release() here to work around
749        * a possible crash when the old view belongs to another context that
750        * was already destroyed.
751        */
752       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
753       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
754                                   views[i]);
755    }
756 
757    for (i = num; i < i915->num_fragment_sampler_views; i++)
758       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
759 
760    i915->num_fragment_sampler_views = num;
761 
762    i915->dirty |= I915_NEW_SAMPLER_VIEW;
763 }
764 
765 static void
i915_set_vertex_sampler_views(struct pipe_context * pipe,unsigned num,struct pipe_sampler_view ** views)766 i915_set_vertex_sampler_views(struct pipe_context *pipe,
767                               unsigned num,
768                               struct pipe_sampler_view **views)
769 {
770    struct i915_context *i915 = i915_context(pipe);
771    uint i;
772 
773    assert(num <= ARRAY_SIZE(i915->vertex_sampler_views));
774 
775    /* Check for no-op */
776    if (num == i915->num_vertex_sampler_views &&
777        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
778       return;
779    }
780 
781    for (i = 0; i < ARRAY_SIZE(i915->vertex_sampler_views); i++) {
782       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
783 
784       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
785    }
786 
787    i915->num_vertex_sampler_views = num;
788 
789    draw_set_sampler_views(i915->draw,
790                           PIPE_SHADER_VERTEX,
791                           i915->vertex_sampler_views,
792                           i915->num_vertex_sampler_views);
793 }
794 
795 
796 static void
i915_set_sampler_views(struct pipe_context * pipe,enum pipe_shader_type shader,unsigned start,unsigned num,struct pipe_sampler_view ** views)797 i915_set_sampler_views(struct pipe_context *pipe, enum pipe_shader_type shader,
798                        unsigned start, unsigned num,
799                        struct pipe_sampler_view **views)
800 {
801    assert(start == 0);
802    switch (shader) {
803    case PIPE_SHADER_FRAGMENT:
804       i915_set_fragment_sampler_views(pipe, num, views);
805       break;
806    case PIPE_SHADER_VERTEX:
807       i915_set_vertex_sampler_views(pipe, num, views);
808       break;
809    default:
810       ;
811    }
812 }
813 
814 
815 struct pipe_sampler_view *
i915_create_sampler_view_custom(struct pipe_context * pipe,struct pipe_resource * texture,const struct pipe_sampler_view * templ,unsigned width0,unsigned height0)816 i915_create_sampler_view_custom(struct pipe_context *pipe,
817                                 struct pipe_resource *texture,
818                                 const struct pipe_sampler_view *templ,
819                                 unsigned width0,
820                                 unsigned height0)
821 {
822    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
823 
824    if (view) {
825       *view = *templ;
826       view->reference.count = 1;
827       view->texture = NULL;
828       pipe_resource_reference(&view->texture, texture);
829       view->context = pipe;
830    }
831 
832    return view;
833 }
834 
835 static struct pipe_sampler_view *
i915_create_sampler_view(struct pipe_context * pipe,struct pipe_resource * texture,const struct pipe_sampler_view * templ)836 i915_create_sampler_view(struct pipe_context *pipe,
837                          struct pipe_resource *texture,
838                          const struct pipe_sampler_view *templ)
839 {
840    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
841 
842    if (view) {
843       *view = *templ;
844       view->reference.count = 1;
845       view->texture = NULL;
846       pipe_resource_reference(&view->texture, texture);
847       view->context = pipe;
848    }
849 
850    return view;
851 }
852 
853 
854 static void
i915_sampler_view_destroy(struct pipe_context * pipe,struct pipe_sampler_view * view)855 i915_sampler_view_destroy(struct pipe_context *pipe,
856                           struct pipe_sampler_view *view)
857 {
858    pipe_resource_reference(&view->texture, NULL);
859    FREE(view);
860 }
861 
862 
i915_set_framebuffer_state(struct pipe_context * pipe,const struct pipe_framebuffer_state * fb)863 static void i915_set_framebuffer_state(struct pipe_context *pipe,
864 				       const struct pipe_framebuffer_state *fb)
865 {
866    struct i915_context *i915 = i915_context(pipe);
867    int i;
868 
869    i915->framebuffer.width = fb->width;
870    i915->framebuffer.height = fb->height;
871    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
872    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
873       pipe_surface_reference(&i915->framebuffer.cbufs[i],
874                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
875    }
876    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
877 
878    i915->dirty |= I915_NEW_FRAMEBUFFER;
879 }
880 
881 
882 
i915_set_clip_state(struct pipe_context * pipe,const struct pipe_clip_state * clip)883 static void i915_set_clip_state( struct pipe_context *pipe,
884 			     const struct pipe_clip_state *clip )
885 {
886    struct i915_context *i915 = i915_context(pipe);
887 
888    i915->clip = *clip;
889 
890    draw_set_clip_state(i915->draw, clip);
891 
892    i915->dirty |= I915_NEW_CLIP;
893 }
894 
895 
896 
897 /* Called when driver state tracker notices changes to the viewport
898  * matrix:
899  */
i915_set_viewport_states(struct pipe_context * pipe,unsigned start_slot,unsigned num_viewports,const struct pipe_viewport_state * viewport)900 static void i915_set_viewport_states( struct pipe_context *pipe,
901                                       unsigned start_slot,
902                                       unsigned num_viewports,
903 				     const struct pipe_viewport_state *viewport )
904 {
905    struct i915_context *i915 = i915_context(pipe);
906 
907    i915->viewport = *viewport; /* struct copy */
908 
909    /* pass the viewport info to the draw module */
910    draw_set_viewport_states(i915->draw, start_slot, num_viewports,
911                             &i915->viewport);
912 
913    i915->dirty |= I915_NEW_VIEWPORT;
914 }
915 
916 
917 static void *
i915_create_rasterizer_state(struct pipe_context * pipe,const struct pipe_rasterizer_state * rasterizer)918 i915_create_rasterizer_state(struct pipe_context *pipe,
919                              const struct pipe_rasterizer_state *rasterizer)
920 {
921    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
922 
923    cso->templ = *rasterizer;
924    cso->light_twoside = rasterizer->light_twoside;
925    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
926    cso->ds[1].f = rasterizer->offset_scale;
927    if (rasterizer->poly_stipple_enable) {
928       cso->st |= ST1_ENABLE;
929    }
930 
931    if (rasterizer->scissor)
932       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
933    else
934       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
935 
936    switch (rasterizer->cull_face) {
937    case PIPE_FACE_NONE:
938       cso->LIS4 |= S4_CULLMODE_NONE;
939       break;
940    case PIPE_FACE_FRONT:
941       if (rasterizer->front_ccw)
942          cso->LIS4 |= S4_CULLMODE_CCW;
943       else
944          cso->LIS4 |= S4_CULLMODE_CW;
945       break;
946    case PIPE_FACE_BACK:
947       if (rasterizer->front_ccw)
948          cso->LIS4 |= S4_CULLMODE_CW;
949       else
950          cso->LIS4 |= S4_CULLMODE_CCW;
951       break;
952    case PIPE_FACE_FRONT_AND_BACK:
953       cso->LIS4 |= S4_CULLMODE_BOTH;
954       break;
955    }
956 
957    {
958       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
959 
960       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
961 
962       if (rasterizer->line_smooth)
963 	 cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
964    }
965 
966    {
967       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
968 
969       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
970    }
971 
972    if (rasterizer->flatshade) {
973       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
974                     S4_FLATSHADE_COLOR |
975                     S4_FLATSHADE_SPECULAR);
976    }
977 
978    cso->LIS7 = fui( rasterizer->offset_units );
979 
980 
981    return cso;
982 }
983 
i915_bind_rasterizer_state(struct pipe_context * pipe,void * raster)984 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
985                                         void *raster )
986 {
987    struct i915_context *i915 = i915_context(pipe);
988 
989    if (i915->rasterizer == raster)
990       return;
991 
992    i915->rasterizer = (struct i915_rasterizer_state *)raster;
993 
994    /* pass-through to draw module */
995    draw_set_rasterizer_state(i915->draw,
996                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
997                            raster);
998 
999    i915->dirty |= I915_NEW_RASTERIZER;
1000 }
1001 
i915_delete_rasterizer_state(struct pipe_context * pipe,void * raster)1002 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
1003                                          void *raster)
1004 {
1005    FREE(raster);
1006 }
1007 
i915_set_vertex_buffers(struct pipe_context * pipe,unsigned start_slot,unsigned count,const struct pipe_vertex_buffer * buffers)1008 static void i915_set_vertex_buffers(struct pipe_context *pipe,
1009                                     unsigned start_slot, unsigned count,
1010                                     const struct pipe_vertex_buffer *buffers)
1011 {
1012    struct i915_context *i915 = i915_context(pipe);
1013    struct draw_context *draw = i915->draw;
1014 
1015    util_set_vertex_buffers_count(i915->vertex_buffers,
1016                                  &i915->nr_vertex_buffers,
1017                                  buffers, start_slot, count);
1018 
1019    /* pass-through to draw module */
1020    draw_set_vertex_buffers(draw, start_slot, count, buffers);
1021 }
1022 
1023 static void *
i915_create_vertex_elements_state(struct pipe_context * pipe,unsigned count,const struct pipe_vertex_element * attribs)1024 i915_create_vertex_elements_state(struct pipe_context *pipe,
1025                                   unsigned count,
1026                                   const struct pipe_vertex_element *attribs)
1027 {
1028    struct i915_velems_state *velems;
1029    assert(count <= PIPE_MAX_ATTRIBS);
1030    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
1031    if (velems) {
1032       velems->count = count;
1033       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
1034    }
1035    return velems;
1036 }
1037 
1038 static void
i915_bind_vertex_elements_state(struct pipe_context * pipe,void * velems)1039 i915_bind_vertex_elements_state(struct pipe_context *pipe,
1040                                 void *velems)
1041 {
1042    struct i915_context *i915 = i915_context(pipe);
1043    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1044 
1045    if (i915->velems == velems)
1046       return;
1047 
1048    i915->velems = velems;
1049 
1050    /* pass-through to draw module */
1051    if (i915_velems) {
1052       draw_set_vertex_elements(i915->draw,
1053             i915_velems->count, i915_velems->velem);
1054    }
1055 }
1056 
1057 static void
i915_delete_vertex_elements_state(struct pipe_context * pipe,void * velems)1058 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
1059 {
1060    FREE( velems );
1061 }
1062 
i915_set_index_buffer(struct pipe_context * pipe,const struct pipe_index_buffer * ib)1063 static void i915_set_index_buffer(struct pipe_context *pipe,
1064                                   const struct pipe_index_buffer *ib)
1065 {
1066    struct i915_context *i915 = i915_context(pipe);
1067 
1068    if (ib)
1069       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1070    else
1071       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1072 }
1073 
1074 static void
i915_set_sample_mask(struct pipe_context * pipe,unsigned sample_mask)1075 i915_set_sample_mask(struct pipe_context *pipe,
1076                      unsigned sample_mask)
1077 {
1078 }
1079 
1080 void
i915_init_state_functions(struct i915_context * i915)1081 i915_init_state_functions( struct i915_context *i915 )
1082 {
1083    i915->base.create_blend_state = i915_create_blend_state;
1084    i915->base.bind_blend_state = i915_bind_blend_state;
1085    i915->base.delete_blend_state = i915_delete_blend_state;
1086 
1087    i915->base.create_sampler_state = i915_create_sampler_state;
1088    i915->base.bind_sampler_states = i915_bind_sampler_states;
1089    i915->base.delete_sampler_state = i915_delete_sampler_state;
1090 
1091    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1092    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1093    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1094 
1095    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1096    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1097    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1098    i915->base.create_fs_state = i915_create_fs_state;
1099    i915->base.bind_fs_state = i915_bind_fs_state;
1100    i915->base.delete_fs_state = i915_delete_fs_state;
1101    i915->base.create_vs_state = i915_create_vs_state;
1102    i915->base.bind_vs_state = i915_bind_vs_state;
1103    i915->base.delete_vs_state = i915_delete_vs_state;
1104    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1105    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1106    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1107 
1108    i915->base.set_blend_color = i915_set_blend_color;
1109    i915->base.set_stencil_ref = i915_set_stencil_ref;
1110    i915->base.set_clip_state = i915_set_clip_state;
1111    i915->base.set_sample_mask = i915_set_sample_mask;
1112    i915->base.set_constant_buffer = i915_set_constant_buffer;
1113    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1114 
1115    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1116    i915->base.set_scissor_states = i915_set_scissor_states;
1117    i915->base.set_sampler_views = i915_set_sampler_views;
1118    i915->base.create_sampler_view = i915_create_sampler_view;
1119    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1120    i915->base.set_viewport_states = i915_set_viewport_states;
1121    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1122    i915->base.set_index_buffer = i915_set_index_buffer;
1123 }
1124