1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 /*
29  * Authors:
30  *   Keith Whitwell <keith@tungstengraphics.com>
31  */
32
33
34#include "pipe/p_context.h"
35#include "util/u_memory.h"
36#include "util/u_math.h"
37#include "util/u_cpu_detect.h"
38#include "util/u_inlines.h"
39#include "draw_context.h"
40#include "draw_vs.h"
41#include "draw_gs.h"
42
43#if HAVE_LLVM
44#include "gallivm/lp_bld_init.h"
45#include "gallivm/lp_bld_limits.h"
46#include "draw_llvm.h"
47
48static boolean
49draw_get_option_use_llvm(void)
50{
51   static boolean first = TRUE;
52   static boolean value;
53   if (first) {
54      first = FALSE;
55      value = debug_get_bool_option("DRAW_USE_LLVM", TRUE);
56
57#ifdef PIPE_ARCH_X86
58      util_cpu_detect();
59      /* require SSE2 due to LLVM PR6960. */
60      if (!util_cpu_caps.has_sse2)
61         value = FALSE;
62#endif
63   }
64   return value;
65}
66#endif
67
68
69/**
70 * Create new draw module context with gallivm state for LLVM JIT.
71 */
72static struct draw_context *
73draw_create_context(struct pipe_context *pipe, boolean try_llvm)
74{
75   struct draw_context *draw = CALLOC_STRUCT( draw_context );
76   if (draw == NULL)
77      goto err_out;
78
79#if HAVE_LLVM
80   if (try_llvm && draw_get_option_use_llvm()) {
81      draw->llvm = draw_llvm_create(draw);
82      if (!draw->llvm)
83         goto err_destroy;
84   }
85#endif
86
87   draw->pipe = pipe;
88
89   if (!draw_init(draw))
90      goto err_destroy;
91
92   return draw;
93
94err_destroy:
95   draw_destroy( draw );
96err_out:
97   return NULL;
98}
99
100
101/**
102 * Create new draw module context, with LLVM JIT.
103 */
104struct draw_context *
105draw_create(struct pipe_context *pipe)
106{
107   return draw_create_context(pipe, TRUE);
108}
109
110
111/**
112 * Create a new draw context, without LLVM JIT.
113 */
114struct draw_context *
115draw_create_no_llvm(struct pipe_context *pipe)
116{
117   return draw_create_context(pipe, FALSE);
118}
119
120
121boolean draw_init(struct draw_context *draw)
122{
123   /*
124    * Note that several functions compute the clipmask of the predefined
125    * formats with hardcoded formulas instead of using these. So modifications
126    * here must be reflected there too.
127    */
128
129   ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
130   ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
131   ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
132   ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
133   ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
134   ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
135   draw->clip_xy = TRUE;
136   draw->clip_z = TRUE;
137
138   draw->pt.user.planes = (float (*) [DRAW_TOTAL_CLIP_PLANES][4]) &(draw->plane[0]);
139
140   if (!draw_pipeline_init( draw ))
141      return FALSE;
142
143   if (!draw_pt_init( draw ))
144      return FALSE;
145
146   if (!draw_vs_init( draw ))
147      return FALSE;
148
149   if (!draw_gs_init( draw ))
150      return FALSE;
151
152   draw->quads_always_flatshade_last = !draw->pipe->screen->get_param(
153      draw->pipe->screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
154
155   return TRUE;
156}
157
158
159void draw_destroy( struct draw_context *draw )
160{
161   struct pipe_context *pipe;
162   int i, j;
163
164   if (!draw)
165      return;
166
167   pipe = draw->pipe;
168
169   /* free any rasterizer CSOs that we may have created.
170    */
171   for (i = 0; i < 2; i++) {
172      for (j = 0; j < 2; j++) {
173         if (draw->rasterizer_no_cull[i][j]) {
174            pipe->delete_rasterizer_state(pipe, draw->rasterizer_no_cull[i][j]);
175         }
176      }
177   }
178
179   for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
180      pipe_resource_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
181   }
182
183   /* Not so fast -- we're just borrowing this at the moment.
184    *
185   if (draw->render)
186      draw->render->destroy( draw->render );
187   */
188
189   draw_pipeline_destroy( draw );
190   draw_pt_destroy( draw );
191   draw_vs_destroy( draw );
192   draw_gs_destroy( draw );
193#ifdef HAVE_LLVM
194   if (draw->llvm)
195      draw_llvm_destroy( draw->llvm );
196#endif
197
198   FREE( draw );
199}
200
201
202
203void draw_flush( struct draw_context *draw )
204{
205   draw_do_flush( draw, DRAW_FLUSH_BACKEND );
206}
207
208
209/**
210 * Specify the Minimum Resolvable Depth factor for polygon offset.
211 * This factor potentially depends on the number of Z buffer bits,
212 * the rasterization algorithm and the arithmetic performed on Z
213 * values between vertex shading and rasterization.  It will vary
214 * from one driver to another.
215 */
216void draw_set_mrd(struct draw_context *draw, double mrd)
217{
218   draw->mrd = mrd;
219}
220
221
222static void update_clip_flags( struct draw_context *draw )
223{
224   draw->clip_xy = !draw->driver.bypass_clip_xy;
225   draw->guard_band_xy = (!draw->driver.bypass_clip_xy &&
226                          draw->driver.guard_band_xy);
227   draw->clip_z = (!draw->driver.bypass_clip_z &&
228                   draw->rasterizer && draw->rasterizer->depth_clip);
229   draw->clip_user = draw->rasterizer &&
230                     draw->rasterizer->clip_plane_enable != 0;
231}
232
233/**
234 * Register new primitive rasterization/rendering state.
235 * This causes the drawing pipeline to be rebuilt.
236 */
237void draw_set_rasterizer_state( struct draw_context *draw,
238                                const struct pipe_rasterizer_state *raster,
239                                void *rast_handle )
240{
241   if (!draw->suspend_flushing) {
242      draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
243
244      draw->rasterizer = raster;
245      draw->rast_handle = rast_handle;
246      update_clip_flags(draw);
247   }
248}
249
250/* With a little more work, llvmpipe will be able to turn this off and
251 * do its own x/y clipping.
252 *
253 * Some hardware can turn off clipping altogether - in particular any
254 * hardware with a TNL unit can do its own clipping, even if it is
255 * relying on the draw module for some other reason.
256 */
257void draw_set_driver_clipping( struct draw_context *draw,
258                               boolean bypass_clip_xy,
259                               boolean bypass_clip_z,
260                               boolean guard_band_xy)
261{
262   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
263
264   draw->driver.bypass_clip_xy = bypass_clip_xy;
265   draw->driver.bypass_clip_z = bypass_clip_z;
266   draw->driver.guard_band_xy = guard_band_xy;
267   update_clip_flags(draw);
268}
269
270
271/**
272 * Plug in the primitive rendering/rasterization stage (which is the last
273 * stage in the drawing pipeline).
274 * This is provided by the device driver.
275 */
276void draw_set_rasterize_stage( struct draw_context *draw,
277                               struct draw_stage *stage )
278{
279   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
280
281   draw->pipeline.rasterize = stage;
282}
283
284
285/**
286 * Set the draw module's clipping state.
287 */
288void draw_set_clip_state( struct draw_context *draw,
289                          const struct pipe_clip_state *clip )
290{
291   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
292
293   memcpy(&draw->plane[6], clip->ucp, sizeof(clip->ucp));
294}
295
296
297/**
298 * Set the draw module's viewport state.
299 */
300void draw_set_viewport_state( struct draw_context *draw,
301                              const struct pipe_viewport_state *viewport )
302{
303   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
304   draw->viewport = *viewport; /* struct copy */
305   draw->identity_viewport = (viewport->scale[0] == 1.0f &&
306                              viewport->scale[1] == 1.0f &&
307                              viewport->scale[2] == 1.0f &&
308                              viewport->scale[3] == 1.0f &&
309                              viewport->translate[0] == 0.0f &&
310                              viewport->translate[1] == 0.0f &&
311                              viewport->translate[2] == 0.0f &&
312                              viewport->translate[3] == 0.0f);
313
314   draw_vs_set_viewport( draw, viewport );
315}
316
317
318
319void
320draw_set_vertex_buffers(struct draw_context *draw,
321                        unsigned count,
322                        const struct pipe_vertex_buffer *buffers)
323{
324   assert(count <= PIPE_MAX_ATTRIBS);
325
326   util_copy_vertex_buffers(draw->pt.vertex_buffer,
327                            &draw->pt.nr_vertex_buffers,
328                            buffers, count);
329}
330
331
332void
333draw_set_vertex_elements(struct draw_context *draw,
334                         unsigned count,
335                         const struct pipe_vertex_element *elements)
336{
337   assert(count <= PIPE_MAX_ATTRIBS);
338
339   /* We could improve this by only flushing the frontend and the fetch part
340    * of the middle. This would avoid recalculating the emit keys.*/
341   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
342
343   memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
344   draw->pt.nr_vertex_elements = count;
345}
346
347
348/**
349 * Tell drawing context where to find mapped vertex buffers.
350 */
351void
352draw_set_mapped_vertex_buffer(struct draw_context *draw,
353                              unsigned attr, const void *buffer)
354{
355   draw->pt.user.vbuffer[attr] = buffer;
356}
357
358
359void
360draw_set_mapped_constant_buffer(struct draw_context *draw,
361                                unsigned shader_type,
362                                unsigned slot,
363                                const void *buffer,
364                                unsigned size )
365{
366   debug_assert(shader_type == PIPE_SHADER_VERTEX ||
367                shader_type == PIPE_SHADER_GEOMETRY);
368   debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
369
370   switch (shader_type) {
371   case PIPE_SHADER_VERTEX:
372      draw->pt.user.vs_constants[slot] = buffer;
373      draw->pt.user.vs_constants_size[slot] = size;
374      draw_vs_set_constants(draw, slot, buffer, size);
375      break;
376   case PIPE_SHADER_GEOMETRY:
377      draw->pt.user.gs_constants[slot] = buffer;
378      draw->pt.user.gs_constants_size[slot] = size;
379      draw_gs_set_constants(draw, slot, buffer, size);
380      break;
381   default:
382      assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
383   }
384}
385
386
387/**
388 * Tells the draw module to draw points with triangles if their size
389 * is greater than this threshold.
390 */
391void
392draw_wide_point_threshold(struct draw_context *draw, float threshold)
393{
394   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
395   draw->pipeline.wide_point_threshold = threshold;
396}
397
398
399/**
400 * Should the draw module handle point->quad conversion for drawing sprites?
401 */
402void
403draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
404{
405   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
406   draw->pipeline.wide_point_sprites = draw_sprite;
407}
408
409
410/**
411 * Tells the draw module to draw lines with triangles if their width
412 * is greater than this threshold.
413 */
414void
415draw_wide_line_threshold(struct draw_context *draw, float threshold)
416{
417   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
418   draw->pipeline.wide_line_threshold = roundf(threshold);
419}
420
421
422/**
423 * Tells the draw module whether or not to implement line stipple.
424 */
425void
426draw_enable_line_stipple(struct draw_context *draw, boolean enable)
427{
428   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
429   draw->pipeline.line_stipple = enable;
430}
431
432
433/**
434 * Tells draw module whether to convert points to quads for sprite mode.
435 */
436void
437draw_enable_point_sprites(struct draw_context *draw, boolean enable)
438{
439   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
440   draw->pipeline.point_sprite = enable;
441}
442
443
444void
445draw_set_force_passthrough( struct draw_context *draw, boolean enable )
446{
447   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
448   draw->force_passthrough = enable;
449}
450
451
452
453/**
454 * Allocate an extra vertex/geometry shader vertex attribute, if it doesn't
455 * exist already.
456 *
457 * This is used by some of the optional draw module stages such
458 * as wide_point which may need to allocate additional generic/texcoord
459 * attributes.
460 */
461int
462draw_alloc_extra_vertex_attrib(struct draw_context *draw,
463                               uint semantic_name, uint semantic_index)
464{
465   int slot;
466   uint num_outputs;
467   uint n;
468
469   slot = draw_find_shader_output(draw, semantic_name, semantic_index);
470   if (slot > 0) {
471      return slot;
472   }
473
474   num_outputs = draw_current_shader_outputs(draw);
475   n = draw->extra_shader_outputs.num;
476
477   assert(n < Elements(draw->extra_shader_outputs.semantic_name));
478
479   draw->extra_shader_outputs.semantic_name[n] = semantic_name;
480   draw->extra_shader_outputs.semantic_index[n] = semantic_index;
481   draw->extra_shader_outputs.slot[n] = num_outputs + n;
482   draw->extra_shader_outputs.num++;
483
484   return draw->extra_shader_outputs.slot[n];
485}
486
487
488/**
489 * Remove all extra vertex attributes that were allocated with
490 * draw_alloc_extra_vertex_attrib().
491 */
492void
493draw_remove_extra_vertex_attribs(struct draw_context *draw)
494{
495   draw->extra_shader_outputs.num = 0;
496}
497
498
499/**
500 * If a geometry shader is present, return its info, else the vertex shader's
501 * info.
502 */
503struct tgsi_shader_info *
504draw_get_shader_info(const struct draw_context *draw)
505{
506
507   if (draw->gs.geometry_shader) {
508      return &draw->gs.geometry_shader->info;
509   } else {
510      return &draw->vs.vertex_shader->info;
511   }
512}
513
514
515/**
516 * Ask the draw module for the location/slot of the given vertex attribute in
517 * a post-transformed vertex.
518 *
519 * With this function, drivers that use the draw module should have no reason
520 * to track the current vertex/geometry shader.
521 *
522 * Note that the draw module may sometimes generate vertices with extra
523 * attributes (such as texcoords for AA lines).  The driver can call this
524 * function to find those attributes.
525 *
526 * Zero is returned if the attribute is not found since this is
527 * a don't care / undefined situtation.  Returning -1 would be a bit more
528 * work for the drivers.
529 */
530int
531draw_find_shader_output(const struct draw_context *draw,
532                        uint semantic_name, uint semantic_index)
533{
534   const struct tgsi_shader_info *info = draw_get_shader_info(draw);
535   uint i;
536
537   for (i = 0; i < info->num_outputs; i++) {
538      if (info->output_semantic_name[i] == semantic_name &&
539          info->output_semantic_index[i] == semantic_index)
540         return i;
541   }
542
543   /* Search the extra vertex attributes */
544   for (i = 0; i < draw->extra_shader_outputs.num; i++) {
545      if (draw->extra_shader_outputs.semantic_name[i] == semantic_name &&
546          draw->extra_shader_outputs.semantic_index[i] == semantic_index) {
547         return draw->extra_shader_outputs.slot[i];
548      }
549   }
550
551   return 0;
552}
553
554
555/**
556 * Return total number of the shader outputs.  This function is similar to
557 * draw_current_shader_outputs() but this function also counts any extra
558 * vertex/geometry output attributes that may be filled in by some draw
559 * stages (such as AA point, AA line).
560 *
561 * If geometry shader is present, its output will be returned,
562 * if not vertex shader is used.
563 */
564uint
565draw_num_shader_outputs(const struct draw_context *draw)
566{
567   const struct tgsi_shader_info *info = draw_get_shader_info(draw);
568   uint count;
569
570   count = info->num_outputs;
571   count += draw->extra_shader_outputs.num;
572
573   return count;
574}
575
576
577/**
578 * Provide TGSI sampler objects for vertex/geometry shaders that use
579 * texture fetches.  This state only needs to be set once per context.
580 * This might only be used by software drivers for the time being.
581 */
582void
583draw_texture_samplers(struct draw_context *draw,
584                      uint shader,
585                      uint num_samplers,
586                      struct tgsi_sampler **samplers)
587{
588   if (shader == PIPE_SHADER_VERTEX) {
589      draw->vs.tgsi.num_samplers = num_samplers;
590      draw->vs.tgsi.samplers = samplers;
591   } else {
592      debug_assert(shader == PIPE_SHADER_GEOMETRY);
593      draw->gs.tgsi.num_samplers = num_samplers;
594      draw->gs.tgsi.samplers = samplers;
595   }
596}
597
598
599
600
601void draw_set_render( struct draw_context *draw,
602		      struct vbuf_render *render )
603{
604   draw->render = render;
605}
606
607
608/**
609 * Tell the draw module where vertex indexes/elements are located, and
610 * their size (in bytes).
611 *
612 * Note: the caller must apply the pipe_index_buffer::offset value to
613 * the address.  The draw module doesn't do that.
614 */
615void
616draw_set_indexes(struct draw_context *draw,
617                 const void *elements, unsigned elem_size)
618{
619   assert(elem_size == 0 ||
620          elem_size == 1 ||
621          elem_size == 2 ||
622          elem_size == 4);
623   draw->pt.user.elts = elements;
624   draw->pt.user.eltSizeIB = elem_size;
625}
626
627
628/* Revamp me please:
629 */
630void draw_do_flush( struct draw_context *draw, unsigned flags )
631{
632   if (!draw->suspend_flushing)
633   {
634      assert(!draw->flushing); /* catch inadvertant recursion */
635
636      draw->flushing = TRUE;
637
638      draw_pipeline_flush( draw, flags );
639
640      draw_pt_flush( draw, flags );
641
642      draw->flushing = FALSE;
643   }
644}
645
646
647/**
648 * Return the number of output attributes produced by the geometry
649 * shader, if present.  If no geometry shader, return the number of
650 * outputs from the vertex shader.
651 * \sa draw_num_shader_outputs
652 */
653uint
654draw_current_shader_outputs(const struct draw_context *draw)
655{
656   if (draw->gs.geometry_shader)
657      return draw->gs.num_gs_outputs;
658   return draw->vs.num_vs_outputs;
659}
660
661
662/**
663 * Return the index of the shader output which will contain the
664 * vertex position.
665 */
666uint
667draw_current_shader_position_output(const struct draw_context *draw)
668{
669   if (draw->gs.geometry_shader)
670      return draw->gs.position_output;
671   return draw->vs.position_output;
672}
673
674
675/**
676 * Return the index of the shader output which will contain the
677 * vertex position.
678 */
679uint
680draw_current_shader_clipvertex_output(const struct draw_context *draw)
681{
682   return draw->vs.clipvertex_output;
683}
684
685uint
686draw_current_shader_clipdistance_output(const struct draw_context *draw, int index)
687{
688   return draw->vs.clipdistance_output[index];
689}
690
691/**
692 * Return a pointer/handle for a driver/CSO rasterizer object which
693 * disabled culling, stippling, unfilled tris, etc.
694 * This is used by some pipeline stages (such as wide_point, aa_line
695 * and aa_point) which convert points/lines into triangles.  In those
696 * cases we don't want to accidentally cull the triangles.
697 *
698 * \param scissor  should the rasterizer state enable scissoring?
699 * \param flatshade  should the rasterizer state use flat shading?
700 * \return  rasterizer CSO handle
701 */
702void *
703draw_get_rasterizer_no_cull( struct draw_context *draw,
704                             boolean scissor,
705                             boolean flatshade )
706{
707   if (!draw->rasterizer_no_cull[scissor][flatshade]) {
708      /* create now */
709      struct pipe_context *pipe = draw->pipe;
710      struct pipe_rasterizer_state rast;
711
712      memset(&rast, 0, sizeof(rast));
713      rast.scissor = scissor;
714      rast.flatshade = flatshade;
715      rast.front_ccw = 1;
716      rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
717
718      draw->rasterizer_no_cull[scissor][flatshade] =
719         pipe->create_rasterizer_state(pipe, &rast);
720   }
721   return draw->rasterizer_no_cull[scissor][flatshade];
722}
723
724void
725draw_set_mapped_so_targets(struct draw_context *draw,
726                           int num_targets,
727                           struct draw_so_target *targets[PIPE_MAX_SO_BUFFERS])
728{
729   int i;
730
731   for (i = 0; i < num_targets; i++)
732      draw->so.targets[i] = targets[i];
733   for (i = num_targets; i < PIPE_MAX_SO_BUFFERS; i++)
734      draw->so.targets[i] = NULL;
735
736   draw->so.num_targets = num_targets;
737}
738
739void
740draw_set_mapped_so_buffers(struct draw_context *draw,
741                           void *buffers[PIPE_MAX_SO_BUFFERS],
742                           unsigned num_buffers)
743{
744}
745
746void
747draw_set_so_state(struct draw_context *draw,
748                  struct pipe_stream_output_info *state)
749{
750   memcpy(&draw->so.state,
751          state,
752          sizeof(struct pipe_stream_output_info));
753}
754
755void
756draw_set_sampler_views(struct draw_context *draw,
757                       unsigned shader_stage,
758                       struct pipe_sampler_view **views,
759                       unsigned num)
760{
761   unsigned i;
762
763   debug_assert(shader_stage < PIPE_SHADER_TYPES);
764   debug_assert(num <= PIPE_MAX_SAMPLERS);
765
766   for (i = 0; i < num; ++i)
767      draw->sampler_views[shader_stage][i] = views[i];
768   for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
769      draw->sampler_views[shader_stage][i] = NULL;
770
771   draw->num_sampler_views[shader_stage] = num;
772}
773
774void
775draw_set_samplers(struct draw_context *draw,
776                  unsigned shader_stage,
777                  struct pipe_sampler_state **samplers,
778                  unsigned num)
779{
780   unsigned i;
781
782   debug_assert(shader_stage < PIPE_SHADER_TYPES);
783   debug_assert(num <= PIPE_MAX_SAMPLERS);
784
785   for (i = 0; i < num; ++i)
786      draw->samplers[shader_stage][i] = samplers[i];
787   for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
788      draw->samplers[shader_stage][i] = NULL;
789
790   draw->num_samplers[shader_stage] = num;
791
792#ifdef HAVE_LLVM
793   if (draw->llvm && shader_stage == PIPE_SHADER_VERTEX)
794      draw_llvm_set_sampler_state(draw);
795#endif
796}
797
798void
799draw_set_mapped_texture(struct draw_context *draw,
800                        unsigned shader_stage,
801                        unsigned sampler_idx,
802                        uint32_t width, uint32_t height, uint32_t depth,
803                        uint32_t first_level, uint32_t last_level,
804                        uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
805                        uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
806                        const void *data[PIPE_MAX_TEXTURE_LEVELS])
807{
808   if (shader_stage == PIPE_SHADER_VERTEX) {
809#ifdef HAVE_LLVM
810      if (draw->llvm)
811         draw_llvm_set_mapped_texture(draw,
812                                      sampler_idx,
813                                      width, height, depth, first_level, last_level,
814                                      row_stride, img_stride, data);
815#endif
816   }
817}
818
819/**
820 * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
821 * different ways of setting textures, and drivers typically only support one.
822 */
823int
824draw_get_shader_param_no_llvm(unsigned shader, enum pipe_shader_cap param)
825{
826   switch(shader) {
827   case PIPE_SHADER_VERTEX:
828   case PIPE_SHADER_GEOMETRY:
829      return tgsi_exec_get_shader_param(param);
830   default:
831      return 0;
832   }
833}
834
835/**
836 * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
837 * different ways of setting textures, and drivers typically only support one.
838 */
839int
840draw_get_shader_param(unsigned shader, enum pipe_shader_cap param)
841{
842
843#ifdef HAVE_LLVM
844   if (draw_get_option_use_llvm()) {
845      switch(shader) {
846      case PIPE_SHADER_VERTEX:
847      case PIPE_SHADER_GEOMETRY:
848         return gallivm_get_shader_param(param);
849      default:
850         return 0;
851      }
852   }
853#endif
854
855   return draw_get_shader_param_no_llvm(shader, param);
856}
857
858