summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/draw/draw_context.c
blob: 995b675b9a16b856be9f000499e48a267714074a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

 /*
  * Authors:
  *   Keith Whitwell <keith@tungstengraphics.com>
  */


#include "pipe/p_context.h"
#include "util/u_memory.h"
#include "util/u_math.h"
#include "draw_context.h"
#include "draw_vs.h"
#include "draw_gs.h"

#if HAVE_LLVM
#include "gallivm/lp_bld_init.h"
#include "draw_llvm.h"
#endif

struct draw_context *draw_create( struct pipe_context *pipe )
{
   struct draw_context *draw = CALLOC_STRUCT( draw_context );
   if (draw == NULL)
      goto fail;

#if HAVE_LLVM
   lp_build_init();
   assert(lp_build_engine);
   draw->engine = lp_build_engine;
   draw->llvm = draw_llvm_create(draw);
#endif

   if (!draw_init(draw))
      goto fail;

   draw->pipe = pipe;

   return draw;

fail:
   draw_destroy( draw );
   return NULL;
}

boolean draw_init(struct draw_context *draw)
{
   /*
    * Note that several functions compute the clipmask of the predefined
    * formats with hardcoded formulas instead of using these. So modifications
    * here must be reflected there too.
    */

   ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
   ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
   ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
   ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
   ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
   ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
   draw->nr_planes = 6;


   draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */


   if (!draw_pipeline_init( draw ))
      return FALSE;

   if (!draw_pt_init( draw ))
      return FALSE;

   if (!draw_vs_init( draw ))
      return FALSE;

   if (!draw_gs_init( draw ))
      return FALSE;

   return TRUE;
}


void draw_destroy( struct draw_context *draw )
{
   struct pipe_context *pipe;
   int i, j;

   if (!draw)
      return;

   pipe = draw->pipe;

   /* free any rasterizer CSOs that we may have created.
    */
   for (i = 0; i < 2; i++) {
      for (j = 0; j < 2; j++) {
         if (draw->rasterizer_no_cull[i][j]) {
            pipe->delete_rasterizer_state(pipe, draw->rasterizer_no_cull[i][j]);
         }
      }
   }

   /* Not so fast -- we're just borrowing this at the moment.
    * 
   if (draw->render)
      draw->render->destroy( draw->render );
   */

   draw_pipeline_destroy( draw );
   draw_pt_destroy( draw );
   draw_vs_destroy( draw );
   draw_gs_destroy( draw );
#ifdef HAVE_LLVM
   draw_llvm_destroy( draw->llvm );
#endif

   FREE( draw );
}



void draw_flush( struct draw_context *draw )
{
   draw_do_flush( draw, DRAW_FLUSH_BACKEND );
}


/**
 * Specify the Minimum Resolvable Depth factor for polygon offset.
 * This factor potentially depends on the number of Z buffer bits,
 * the rasterization algorithm and the arithmetic performed on Z
 * values between vertex shading and rasterization.  It will vary
 * from one driver to another.
 */
void draw_set_mrd(struct draw_context *draw, double mrd)
{
   draw->mrd = mrd;
}


/**
 * Register new primitive rasterization/rendering state.
 * This causes the drawing pipeline to be rebuilt.
 */
void draw_set_rasterizer_state( struct draw_context *draw,
                                const struct pipe_rasterizer_state *raster,
                                void *rast_handle )
{
   if (!draw->suspend_flushing) {
      draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );

      draw->rasterizer = raster;
      draw->rast_handle = rast_handle;

      draw->bypass_clipping = draw->driver.bypass_clipping;
   }
}


void draw_set_driver_clipping( struct draw_context *draw,
                               boolean bypass_clipping )
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );

   draw->driver.bypass_clipping = bypass_clipping;
   draw->bypass_clipping = draw->driver.bypass_clipping;
}


/** 
 * Plug in the primitive rendering/rasterization stage (which is the last
 * stage in the drawing pipeline).
 * This is provided by the device driver.
 */
void draw_set_rasterize_stage( struct draw_context *draw,
                               struct draw_stage *stage )
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );

   draw->pipeline.rasterize = stage;
}


/**
 * Set the draw module's clipping state.
 */
void draw_set_clip_state( struct draw_context *draw,
                          const struct pipe_clip_state *clip )
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );

   assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
   memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
   draw->nr_planes = 6 + clip->nr;
   draw->depth_clamp = clip->depth_clamp;
}


/**
 * Set the draw module's viewport state.
 */
void draw_set_viewport_state( struct draw_context *draw,
                              const struct pipe_viewport_state *viewport )
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->viewport = *viewport; /* struct copy */
   draw->identity_viewport = (viewport->scale[0] == 1.0f &&
                              viewport->scale[1] == 1.0f &&
                              viewport->scale[2] == 1.0f &&
                              viewport->scale[3] == 1.0f &&
                              viewport->translate[0] == 0.0f &&
                              viewport->translate[1] == 0.0f &&
                              viewport->translate[2] == 0.0f &&
                              viewport->translate[3] == 0.0f);

   draw_vs_set_viewport( draw, viewport );
}



void
draw_set_vertex_buffers(struct draw_context *draw,
                        unsigned count,
                        const struct pipe_vertex_buffer *buffers)
{
   assert(count <= PIPE_MAX_ATTRIBS);

   memcpy(draw->pt.vertex_buffer, buffers, count * sizeof(buffers[0]));
   draw->pt.nr_vertex_buffers = count;
}


void
draw_set_vertex_elements(struct draw_context *draw,
                         unsigned count,
                         const struct pipe_vertex_element *elements)
{
   assert(count <= PIPE_MAX_ATTRIBS);

   memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
   draw->pt.nr_vertex_elements = count;
}


/**
 * Tell drawing context where to find mapped vertex buffers.
 */
void
draw_set_mapped_vertex_buffer(struct draw_context *draw,
                              unsigned attr, const void *buffer)
{
   draw->pt.user.vbuffer[attr] = buffer;
}


void
draw_set_mapped_constant_buffer(struct draw_context *draw,
                                unsigned shader_type,
                                unsigned slot,
                                const void *buffer,
                                unsigned size )
{
   debug_assert(shader_type == PIPE_SHADER_VERTEX ||
                shader_type == PIPE_SHADER_GEOMETRY);
   debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);

   switch (shader_type) {
   case PIPE_SHADER_VERTEX:
      draw->pt.user.vs_constants[slot] = buffer;
      draw->pt.user.vs_constants_size[slot] = size;
      draw_vs_set_constants(draw, slot, buffer, size);
      break;
   case PIPE_SHADER_GEOMETRY:
      draw->pt.user.gs_constants[slot] = buffer;
      draw->pt.user.gs_constants_size[slot] = size;
      draw_gs_set_constants(draw, slot, buffer, size);
      break;
   default:
      assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
   }
}


/**
 * Tells the draw module to draw points with triangles if their size
 * is greater than this threshold.
 */
void
draw_wide_point_threshold(struct draw_context *draw, float threshold)
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->pipeline.wide_point_threshold = threshold;
}


/**
 * Should the draw module handle point->quad conversion for drawing sprites?
 */
void
draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->pipeline.wide_point_sprites = draw_sprite;
}


/**
 * Tells the draw module to draw lines with triangles if their width
 * is greater than this threshold.
 */
void
draw_wide_line_threshold(struct draw_context *draw, float threshold)
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->pipeline.wide_line_threshold = threshold;
}


/**
 * Tells the draw module whether or not to implement line stipple.
 */
void
draw_enable_line_stipple(struct draw_context *draw, boolean enable)
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->pipeline.line_stipple = enable;
}


/**
 * Tells draw module whether to convert points to quads for sprite mode.
 */
void
draw_enable_point_sprites(struct draw_context *draw, boolean enable)
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->pipeline.point_sprite = enable;
}


void
draw_set_force_passthrough( struct draw_context *draw, boolean enable )
{
   draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
   draw->force_passthrough = enable;
}


/**
 * Ask the draw module for the location/slot of the given vertex attribute in
 * a post-transformed vertex.
 *
 * With this function, drivers that use the draw module should have no reason
 * to track the current vertex/geometry shader.
 *
 * Note that the draw module may sometimes generate vertices with extra
 * attributes (such as texcoords for AA lines).  The driver can call this
 * function to find those attributes.
 *
 * Zero is returned if the attribute is not found since this is
 * a don't care / undefined situtation.  Returning -1 would be a bit more
 * work for the drivers.
 */
int
draw_find_shader_output(const struct draw_context *draw,
                        uint semantic_name, uint semantic_index)
{
   const struct draw_vertex_shader *vs = draw->vs.vertex_shader;
   const struct draw_geometry_shader *gs = draw->gs.geometry_shader;
   uint i;
   const struct tgsi_shader_info *info = &vs->info;

   if (gs)
      info = &gs->info;

   for (i = 0; i < info->num_outputs; i++) {
      if (info->output_semantic_name[i] == semantic_name &&
          info->output_semantic_index[i] == semantic_index)
         return i;
   }

   /* XXX there may be more than one extra vertex attrib.
    * For example, simulated gl_FragCoord and gl_PointCoord.
    */
   if (draw->extra_shader_outputs.semantic_name == semantic_name &&
       draw->extra_shader_outputs.semantic_index == semantic_index) {
      return draw->extra_shader_outputs.slot;
   }

   return 0;
}


/**
 * Return total number of the shader outputs.  This function is similar to
 * draw_current_shader_outputs() but this function also counts any extra
 * vertex/geometry output attributes that may be filled in by some draw
 * stages (such as AA point, AA line).
 *
 * If geometry shader is present, its output will be returned,
 * if not vertex shader is used.
 */
uint
draw_num_shader_outputs(const struct draw_context *draw)
{
   uint count = draw->vs.vertex_shader->info.num_outputs;

   /* If a geometry shader is present, its outputs go to the
    * driver, else the vertex shader's outputs.
    */
   if (draw->gs.geometry_shader)
      count = draw->gs.geometry_shader->info.num_outputs;

   if (draw->extra_shader_outputs.slot > 0)
      count++;
   return count;
}


/**
 * Provide TGSI sampler objects for vertex/geometry shaders that use
 * texture fetches.
 * This might only be used by software drivers for the time being.
 */
void
draw_texture_samplers(struct draw_context *draw,
                      uint shader,
                      uint num_samplers,
                      struct tgsi_sampler **samplers)
{
   if (shader == PIPE_SHADER_VERTEX) {
      draw->vs.num_samplers = num_samplers;
      draw->vs.samplers = samplers;
   } else {
      debug_assert(shader == PIPE_SHADER_GEOMETRY);
      draw->gs.num_samplers = num_samplers;
      draw->gs.samplers = samplers;
   }
}




void draw_set_render( struct draw_context *draw, 
		      struct vbuf_render *render )
{
   draw->render = render;
}



/**
 * Tell the drawing context about the index/element buffer to use
 * (ala glDrawElements)
 * If no element buffer is to be used (i.e. glDrawArrays) then this
 * should be called with eltSize=0 and elements=NULL.
 *
 * \param draw  the drawing context
 * \param eltSize  size of each element (1, 2 or 4 bytes)
 * \param elements  the element buffer ptr
 */
void
draw_set_mapped_element_buffer_range( struct draw_context *draw,
                                      unsigned eltSize,
                                      int eltBias,
                                      unsigned min_index,
                                      unsigned max_index,
                                      const void *elements )
{
   draw->pt.user.elts = elements;
   draw->pt.user.eltSize = eltSize;
   draw->pt.user.eltBias = eltBias;
   draw->pt.user.min_index = min_index;
   draw->pt.user.max_index = max_index;
}


void
draw_set_mapped_element_buffer( struct draw_context *draw,
                                unsigned eltSize,
                                int eltBias,
                                const void *elements )
{
   draw->pt.user.elts = elements;
   draw->pt.user.eltSize = eltSize;
   draw->pt.user.eltBias = eltBias;
   draw->pt.user.min_index = 0;
   draw->pt.user.max_index = 0xffffffff;
}

 
/* Revamp me please:
 */
void draw_do_flush( struct draw_context *draw, unsigned flags )
{
   if (!draw->suspend_flushing)
   {
      assert(!draw->flushing); /* catch inadvertant recursion */

      draw->flushing = TRUE;

      draw_pipeline_flush( draw, flags );

      draw->reduced_prim = ~0; /* is reduced_prim needed any more? */
      
      draw->flushing = FALSE;
   }
}


/**
 * Return the number of output attributes produced by the geometry
 * shader, if present.  If no geometry shader, return the number of
 * outputs from the vertex shader.
 * \sa draw_num_shader_outputs
 */
uint
draw_current_shader_outputs(const struct draw_context *draw)
{
   if (draw->gs.geometry_shader)
      return draw->gs.num_gs_outputs;
   return draw->vs.num_vs_outputs;
}


/**
 * Return the index of the shader output which will contain the
 * vertex position.
 */
uint
draw_current_shader_position_output(const struct draw_context *draw)
{
   if (draw->gs.geometry_shader)
      return draw->gs.position_output;
   return draw->vs.position_output;
}


/**
 * Return a pointer/handle for a driver/CSO rasterizer object which
 * disabled culling, stippling, unfilled tris, etc.
 * This is used by some pipeline stages (such as wide_point, aa_line
 * and aa_point) which convert points/lines into triangles.  In those
 * cases we don't want to accidentally cull the triangles.
 *
 * \param scissor  should the rasterizer state enable scissoring?
 * \param flatshade  should the rasterizer state use flat shading?
 * \return  rasterizer CSO handle
 */
void *
draw_get_rasterizer_no_cull( struct draw_context *draw,
                             boolean scissor,
                             boolean flatshade )
{
   if (!draw->rasterizer_no_cull[scissor][flatshade]) {
      /* create now */
      struct pipe_context *pipe = draw->pipe;
      struct pipe_rasterizer_state rast;

      memset(&rast, 0, sizeof(rast));
      rast.scissor = scissor;
      rast.flatshade = flatshade;
      rast.front_ccw = 1;
      rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;

      draw->rasterizer_no_cull[scissor][flatshade] =
         pipe->create_rasterizer_state(pipe, &rast);
   }
   return draw->rasterizer_no_cull[scissor][flatshade];
}

void
draw_set_mapped_so_buffers(struct draw_context *draw,
                           void *buffers[PIPE_MAX_SO_BUFFERS],
                           unsigned num_buffers)
{
   int i;

   for (i = 0; i < num_buffers; ++i) {
      draw->so.buffers[i] = buffers[i];
   }
   draw->so.num_buffers = num_buffers;
}

void
draw_set_so_state(struct draw_context *draw,
                  struct pipe_stream_output_state *state)
{
   memcpy(&draw->so.state,
          state,
          sizeof(struct pipe_stream_output_state));
}

void
draw_set_sampler_views(struct draw_context *draw,
                       struct pipe_sampler_view **views,
                       unsigned num)
{
   unsigned i;

   debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);

   for (i = 0; i < num; ++i)
      draw->sampler_views[i] = views[i];
   for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
      draw->sampler_views[i] = NULL;

   draw->num_sampler_views = num;
}

void
draw_set_samplers(struct draw_context *draw,
                  struct pipe_sampler_state **samplers,
                  unsigned num)
{
   unsigned i;

   debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);

   for (i = 0; i < num; ++i)
      draw->samplers[i] = samplers[i];
   for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
      draw->samplers[i] = NULL;

   draw->num_samplers = num;
}

void
draw_set_mapped_texture(struct draw_context *draw,
                        unsigned sampler_idx,
                        uint32_t width, uint32_t height, uint32_t depth,
                        uint32_t last_level,
                        uint32_t row_stride[DRAW_MAX_TEXTURE_LEVELS],
                        uint32_t img_stride[DRAW_MAX_TEXTURE_LEVELS],
                        const void *data[DRAW_MAX_TEXTURE_LEVELS])
{
#ifdef HAVE_LLVM
   draw_llvm_set_mapped_texture(draw,
                                sampler_idx,
                                width, height, depth, last_level,
                                row_stride, img_stride, data);
#endif
}