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 /*
29 * Authors:
30 * Keith Whitwell <[email protected]>
31 */
32
33 #include "draw/draw_context.h"
34 #include "draw/draw_gs.h"
35 #include "draw/draw_tess.h"
36 #include "draw/draw_private.h"
37 #include "draw/draw_pt.h"
38 #include "draw/draw_vbuf.h"
39 #include "draw/draw_vs.h"
40 #include "tgsi/tgsi_dump.h"
41 #include "util/u_math.h"
42 #include "util/u_prim.h"
43 #include "util/format/u_format.h"
44 #include "util/u_draw.h"
45
46
47 DEBUG_GET_ONCE_BOOL_OPTION(draw_fse, "DRAW_FSE", false)
48 DEBUG_GET_ONCE_BOOL_OPTION(draw_no_fse, "DRAW_NO_FSE", false)
49
50
51 /* Overall we split things into:
52 * - frontend -- prepare fetch_elts, draw_elts - eg vsplit
53 * - middle -- fetch, shade, cliptest, viewport
54 * - pipeline -- the prim pipeline: clipping, wide lines, etc
55 * - backend -- the vbuf_render provided by the driver.
56 */
57 static bool
draw_pt_arrays(struct draw_context * draw,enum mesa_prim prim,bool index_bias_varies,const struct pipe_draw_start_count_bias * draw_info,unsigned num_draws)58 draw_pt_arrays(struct draw_context *draw,
59 enum mesa_prim prim,
60 bool index_bias_varies,
61 const struct pipe_draw_start_count_bias *draw_info,
62 unsigned num_draws)
63 {
64 enum mesa_prim out_prim = prim;
65
66 if (draw->gs.geometry_shader)
67 out_prim = draw->gs.geometry_shader->output_primitive;
68 else if (draw->tes.tess_eval_shader)
69 out_prim = get_tes_output_prim(draw->tes.tess_eval_shader);
70
71 unsigned opt = PT_SHADE;
72 if (!draw->render) {
73 opt |= PT_PIPELINE;
74 }
75
76 if (draw_need_pipeline(draw, draw->rasterizer, out_prim)) {
77 opt |= PT_PIPELINE;
78 }
79
80 if ((draw->clip_xy ||
81 draw->clip_z ||
82 draw->clip_user) && !draw->pt.test_fse) {
83 opt |= PT_CLIPTEST;
84 }
85
86 struct draw_pt_middle_end *middle;
87 if (draw->pt.middle.llvm) {
88 middle = draw->pt.middle.llvm;
89 } else {
90 if (opt == PT_SHADE && !draw->pt.no_fse)
91 middle = draw->pt.middle.fetch_shade_emit;
92 else
93 middle = draw->pt.middle.general;
94 }
95
96 struct draw_pt_front_end *frontend = draw->pt.frontend;
97 if (frontend) {
98 if (draw->pt.prim != prim || draw->pt.opt != opt) {
99 /* In certain conditions switching primitives requires us to flush
100 * and validate the different stages. One example is when smooth
101 * lines are active but first drawn with triangles and then with
102 * lines.
103 */
104 draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
105 frontend = NULL;
106 } else if (draw->pt.eltSize != draw->pt.user.eltSize || draw->pt.viewid != draw->pt.user.viewid) {
107 /* Flush draw state if eltSize or viewid changed.
108 * eltSize changes could be improved so only the frontend is flushed since it
109 * converts all indices to ushorts and the fetch part of the middle
110 * always prepares both linear and indexed.
111 */
112 frontend->flush(frontend, DRAW_FLUSH_STATE_CHANGE);
113 frontend = NULL;
114 }
115 }
116
117 if (!frontend) {
118 frontend = draw->pt.front.vsplit;
119
120 frontend->prepare(frontend, prim, middle, opt);
121
122 draw->pt.frontend = frontend;
123 draw->pt.eltSize = draw->pt.user.eltSize;
124 draw->pt.viewid = draw->pt.user.viewid;
125 draw->pt.prim = prim;
126 draw->pt.opt = opt;
127 }
128
129 if (draw->pt.rebind_parameters) {
130 /* update constants, viewport dims, clip planes, etc */
131 middle->bind_parameters(middle);
132 draw->pt.rebind_parameters = false;
133 }
134
135 for (unsigned i = 0; i < num_draws; i++) {
136 /* Sanitize primitive length:
137 */
138 unsigned first, incr;
139
140 if (prim == MESA_PRIM_PATCHES) {
141 first = draw->pt.vertices_per_patch;
142 incr = draw->pt.vertices_per_patch;
143 } else {
144 draw_pt_split_prim(prim, &first, &incr);
145 }
146
147 unsigned count = draw_pt_trim_count(draw_info[i].count, first, incr);
148 if (draw->pt.user.eltSize) {
149 if (index_bias_varies) {
150 draw->pt.user.eltBias = draw_info[i].index_bias;
151 } else {
152 draw->pt.user.eltBias = draw_info[0].index_bias;
153 }
154 } else {
155 draw->pt.user.eltBias = 0;
156 }
157
158 draw->start_index = draw_info[i].start;
159
160 if (count >= first)
161 frontend->run(frontend, draw_info[i].start, count);
162
163 if (num_draws > 1 && draw->pt.user.increment_draw_id)
164 draw->pt.user.drawid++;
165 }
166
167 return true;
168 }
169
170
171 void
draw_pt_flush(struct draw_context * draw,unsigned flags)172 draw_pt_flush(struct draw_context *draw, unsigned flags)
173 {
174 assert(flags);
175
176 if (draw->pt.frontend) {
177 draw->pt.frontend->flush(draw->pt.frontend, flags);
178
179 /* don't prepare if we only are flushing the backend */
180 if (flags & DRAW_FLUSH_STATE_CHANGE)
181 draw->pt.frontend = NULL;
182 }
183
184 if (flags & DRAW_FLUSH_PARAMETER_CHANGE) {
185 draw->pt.rebind_parameters = true;
186 }
187 }
188
189
190 bool
draw_pt_init(struct draw_context * draw)191 draw_pt_init(struct draw_context *draw)
192 {
193 draw->pt.test_fse = debug_get_option_draw_fse();
194 draw->pt.no_fse = debug_get_option_draw_no_fse();
195
196 draw->pt.front.vsplit = draw_pt_vsplit(draw);
197 if (!draw->pt.front.vsplit)
198 return false;
199
200 draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse(draw);
201 if (!draw->pt.middle.fetch_shade_emit)
202 return false;
203
204 draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit(draw);
205 if (!draw->pt.middle.general)
206 return false;
207
208 #if DRAW_LLVM_AVAILABLE
209 if (draw->llvm) {
210 draw->pt.middle.llvm = draw_pt_fetch_pipeline_or_emit_llvm(draw);
211 draw->pt.middle.mesh = draw_pt_mesh_pipeline_or_emit(draw);
212 }
213 #endif
214
215 return true;
216 }
217
218
219 void
draw_pt_destroy(struct draw_context * draw)220 draw_pt_destroy(struct draw_context *draw)
221 {
222 if (draw->pt.middle.mesh) {
223 draw->pt.middle.mesh->destroy(draw->pt.middle.mesh);
224 draw->pt.middle.mesh = NULL;
225 }
226
227 if (draw->pt.middle.llvm) {
228 draw->pt.middle.llvm->destroy(draw->pt.middle.llvm);
229 draw->pt.middle.llvm = NULL;
230 }
231
232 if (draw->pt.middle.general) {
233 draw->pt.middle.general->destroy(draw->pt.middle.general);
234 draw->pt.middle.general = NULL;
235 }
236
237 if (draw->pt.middle.fetch_shade_emit) {
238 draw->pt.middle.fetch_shade_emit->destroy(draw->pt.middle.fetch_shade_emit);
239 draw->pt.middle.fetch_shade_emit = NULL;
240 }
241
242 if (draw->pt.front.vsplit) {
243 draw->pt.front.vsplit->destroy(draw->pt.front.vsplit);
244 draw->pt.front.vsplit = NULL;
245 }
246 }
247
248
249 /**
250 * Debug- print the first 'count' vertices.
251 */
252 static void
draw_print_arrays(struct draw_context * draw,enum mesa_prim prim,int start,unsigned count,int index_bias)253 draw_print_arrays(struct draw_context *draw, enum mesa_prim prim,
254 int start, unsigned count, int index_bias)
255 {
256 debug_printf("Draw arrays(prim = %u, start = %u, count = %u)\n",
257 prim, start, count);
258
259 for (unsigned i = 0; i < count; i++) {
260 unsigned ii = 0;
261
262 if (draw->pt.user.eltSize) {
263 /* indexed arrays */
264
265 switch (draw->pt.user.eltSize) {
266 case 1:
267 {
268 const uint8_t *elem = (const uint8_t *) draw->pt.user.elts;
269 ii = elem[start + i];
270 }
271 break;
272 case 2:
273 {
274 const uint16_t *elem = (const uint16_t *) draw->pt.user.elts;
275 ii = elem[start + i];
276 }
277 break;
278 case 4:
279 {
280 const uint32_t *elem = (const uint32_t *) draw->pt.user.elts;
281 ii = elem[start + i];
282 }
283 break;
284 default:
285 assert(0);
286 return;
287 }
288 ii += index_bias;
289 debug_printf("Element[%u + %u] + %i -> Vertex %u:\n", start, i,
290 index_bias, ii);
291 }
292 else {
293 /* non-indexed arrays */
294 ii = start + i;
295 debug_printf("Vertex %u:\n", ii);
296 }
297
298 for (unsigned j = 0; j < draw->pt.nr_vertex_elements; j++) {
299 unsigned buf = draw->pt.vertex_element[j].vertex_buffer_index;
300 uint8_t *ptr = (uint8_t *) draw->pt.user.vbuffer[buf].map;
301
302 if (draw->pt.vertex_element[j].instance_divisor) {
303 ii = draw->instance_id / draw->pt.vertex_element[j].instance_divisor;
304 }
305
306 ptr += draw->pt.vertex_buffer[buf].buffer_offset;
307 ptr += draw->pt.vertex_element[j].src_stride * ii;
308 ptr += draw->pt.vertex_element[j].src_offset;
309
310 debug_printf(" Attr %u: ", j);
311 switch (draw->pt.vertex_element[j].src_format) {
312 case PIPE_FORMAT_R32_FLOAT:
313 {
314 float *v = (float *) ptr;
315 debug_printf("R %f @ %p\n", v[0], (void *) v);
316 }
317 break;
318 case PIPE_FORMAT_R32G32_FLOAT:
319 {
320 float *v = (float *) ptr;
321 debug_printf("RG %f %f @ %p\n", v[0], v[1], (void *) v);
322 }
323 break;
324 case PIPE_FORMAT_R32G32B32_FLOAT:
325 {
326 float *v = (float *) ptr;
327 debug_printf("RGB %f %f %f @ %p\n", v[0], v[1], v[2], (void *) v);
328 }
329 break;
330 case PIPE_FORMAT_R32G32B32A32_FLOAT:
331 {
332 float *v = (float *) ptr;
333 debug_printf("RGBA %f %f %f %f @ %p\n", v[0], v[1], v[2], v[3],
334 (void *) v);
335 }
336 break;
337 case PIPE_FORMAT_B8G8R8A8_UNORM:
338 {
339 uint8_t *u = (uint8_t *) ptr;
340 debug_printf("BGRA %d %d %d %d @ %p\n", u[0], u[1], u[2], u[3],
341 (void *) u);
342 }
343 break;
344 case PIPE_FORMAT_A8R8G8B8_UNORM:
345 {
346 uint8_t *u = (uint8_t *) ptr;
347 debug_printf("ARGB %d %d %d %d @ %p\n", u[0], u[1], u[2], u[3],
348 (void *) u);
349 }
350 break;
351 default:
352 debug_printf("other format %s (fix me)\n",
353 util_format_name(draw->pt.vertex_element[j].src_format));
354 }
355 }
356 }
357 }
358
359
360 /** Helper code for below */
361 static inline void
prim_restart_loop(struct draw_context * draw,const struct pipe_draw_info * info,const struct pipe_draw_start_count_bias * draw_info,const void * elements)362 prim_restart_loop(struct draw_context *draw,
363 const struct pipe_draw_info *info,
364 const struct pipe_draw_start_count_bias *draw_info,
365 const void *elements)
366 {
367 const unsigned elt_max = draw->pt.user.eltMax;
368 struct pipe_draw_start_count_bias cur = *draw_info;
369 cur.count = 0;
370
371 for (unsigned j = 0; j < draw_info->count; j++) {
372 unsigned index = 0;
373 unsigned i = util_clamped_uadd(draw_info->start, j);
374 if (i < elt_max) {
375 switch (draw->pt.user.eltSize) {
376 case 1:
377 index = ((const uint8_t*)elements)[i];
378 break;
379 case 2:
380 index = ((const uint16_t*)elements)[i];
381 break;
382 case 4:
383 index = ((const uint32_t*)elements)[i];
384 break;
385 default:
386 assert(0 && "bad eltSize in draw_arrays()");
387 }
388 }
389
390 if (index == info->restart_index) {
391 if (cur.count > 0) {
392 /* draw elts up to prev pos */
393 draw_pt_arrays(draw, info->mode, info->index_bias_varies, &cur, 1);
394 }
395 /* begin new prim at next elt */
396 cur.start = i + 1;
397 cur.count = 0;
398 }
399 else {
400 cur.count++;
401 }
402 }
403 if (cur.count > 0) {
404 draw_pt_arrays(draw, info->mode, info->index_bias_varies, &cur, 1);
405 }
406 }
407
408
409 /**
410 * For drawing prims with primitive restart enabled.
411 * Scan for restart indexes and draw the runs of elements/vertices between
412 * the restarts.
413 */
414 static void
draw_pt_arrays_restart(struct draw_context * draw,const struct pipe_draw_info * info,const struct pipe_draw_start_count_bias * draw_info,unsigned num_draws)415 draw_pt_arrays_restart(struct draw_context *draw,
416 const struct pipe_draw_info *info,
417 const struct pipe_draw_start_count_bias *draw_info,
418 unsigned num_draws)
419 {
420 assert(info->primitive_restart);
421
422 if (draw->pt.user.eltSize) {
423 /* indexed prims (draw_elements) */
424 for (unsigned i = 0; i < num_draws; i++)
425 prim_restart_loop(draw, info, &draw_info[i], draw->pt.user.elts);
426 } else {
427 /* Non-indexed prims (draw_arrays).
428 * Primitive restart should have been handled in gallium frontends.
429 */
430 draw_pt_arrays(draw, info->mode, info->index_bias_varies, draw_info, num_draws);
431 }
432 }
433
434
435 /**
436 * Resolve true values within pipe_draw_info.
437 * If we're rendering from transform feedback/stream output
438 * buffers both the count and max_index need to be computed
439 * from the attached stream output target.
440 */
441 static void
resolve_draw_info(const struct pipe_draw_info * raw_info,const struct pipe_draw_indirect_info * indirect,const struct pipe_draw_start_count_bias * raw_draw,struct pipe_draw_info * info,struct pipe_draw_start_count_bias * draw,struct pipe_vertex_buffer * vertex_buffer,struct pipe_vertex_element * vertex_element)442 resolve_draw_info(const struct pipe_draw_info *raw_info,
443 const struct pipe_draw_indirect_info *indirect,
444 const struct pipe_draw_start_count_bias *raw_draw,
445 struct pipe_draw_info *info,
446 struct pipe_draw_start_count_bias *draw,
447 struct pipe_vertex_buffer *vertex_buffer,
448 struct pipe_vertex_element *vertex_element)
449 {
450 *info = *raw_info;
451 *draw = *raw_draw;
452
453 struct draw_so_target *target =
454 (struct draw_so_target *)indirect->count_from_stream_output;
455 assert(vertex_buffer != NULL);
456 draw->count = vertex_element->src_stride == 0 ? 0 :
457 target->internal_offset / vertex_element->src_stride;
458
459 /* Stream output draw can not be indexed */
460 assert(!info->index_size);
461 info->max_index = draw->count - 1;
462 }
463
464
465 /*
466 * Loop over all instances and execute draws for them.
467 */
468 static void
draw_instances(struct draw_context * draw,unsigned drawid_offset,const struct pipe_draw_info * info,const struct pipe_draw_start_count_bias * draws,unsigned num_draws)469 draw_instances(struct draw_context *draw,
470 unsigned drawid_offset,
471 const struct pipe_draw_info *info,
472 const struct pipe_draw_start_count_bias *draws,
473 unsigned num_draws)
474 {
475 draw->start_instance = info->start_instance;
476
477 for (unsigned instance = 0; instance < info->instance_count; instance++) {
478 unsigned instance_idx = instance + info->start_instance;
479 draw->instance_id = instance;
480 /* check for overflow */
481 if (instance_idx < instance ||
482 instance_idx < draw->start_instance) {
483 /* if we overflown just set the instance id to the max */
484 draw->instance_id = 0xffffffff;
485 }
486
487 draw->pt.user.drawid = drawid_offset;
488 draw_new_instance(draw);
489
490 if (info->primitive_restart) {
491 draw_pt_arrays_restart(draw, info, draws, num_draws);
492 } else {
493 draw_pt_arrays(draw, info->mode, info->index_bias_varies,
494 draws, num_draws);
495 }
496 }
497 }
498
499
500 /**
501 * Draw vertex arrays.
502 * This is the main entrypoint into the drawing module. If drawing an indexed
503 * primitive, the draw_set_indexes() function should have already been called
504 * to specify the element/index buffer information.
505 */
506 void
draw_vbo(struct draw_context * draw,const struct pipe_draw_info * info,unsigned drawid_offset,const struct pipe_draw_indirect_info * indirect,const struct pipe_draw_start_count_bias * draws,unsigned num_draws,uint8_t patch_vertices)507 draw_vbo(struct draw_context *draw,
508 const struct pipe_draw_info *info,
509 unsigned drawid_offset,
510 const struct pipe_draw_indirect_info *indirect,
511 const struct pipe_draw_start_count_bias *draws,
512 unsigned num_draws,
513 uint8_t patch_vertices)
514 {
515 unsigned fpstate = util_fpstate_get();
516 struct pipe_draw_info resolved_info;
517 struct pipe_draw_start_count_bias resolved_draw;
518 const struct pipe_draw_info *use_info;
519 const struct pipe_draw_start_count_bias *use_draws;
520
521 if (info->instance_count == 0)
522 return;
523
524 /* Make sure that denorms are treated like zeros. This is
525 * the behavior required by D3D10. OpenGL doesn't care.
526 */
527 util_fpstate_set_denorms_to_zero(fpstate);
528
529 if (indirect && indirect->count_from_stream_output) {
530 resolve_draw_info(info, indirect, &draws[0], &resolved_info,
531 &resolved_draw, &(draw->pt.vertex_buffer[0]),
532 &(draw->pt.vertex_element[0]));
533 use_info = &resolved_info;
534 use_draws = &resolved_draw;
535 num_draws = 1;
536 } else {
537 use_info = info;
538 use_draws = draws;
539 }
540
541 if (info->index_size) {
542 assert(draw->pt.user.elts);
543 draw->pt.user.min_index = use_info->index_bounds_valid ? use_info->min_index : 0;
544 draw->pt.user.max_index = use_info->index_bounds_valid ? use_info->max_index : ~0;
545 } else {
546 draw->pt.user.min_index = 0;
547 draw->pt.user.max_index = ~0;
548 }
549 draw->pt.user.eltSize = use_info->index_size ? draw->pt.user.eltSizeIB : 0;
550 draw->pt.user.drawid = drawid_offset;
551 draw->pt.user.increment_draw_id = use_info->increment_draw_id;
552 draw->pt.user.viewid = 0;
553 draw->pt.vertices_per_patch = patch_vertices;
554
555 if (0) {
556 for (unsigned i = 0; i < num_draws; i++)
557 debug_printf("draw_vbo(mode=%u start=%u count=%u):\n",
558 use_info->mode, use_draws[i].start, use_draws[i].count);
559 }
560
561 if (0)
562 tgsi_dump(draw->vs.vertex_shader->state.tokens, 0);
563
564 if (0) {
565 debug_printf("Elements:\n");
566 for (unsigned i = 0; i < draw->pt.nr_vertex_elements; i++) {
567 debug_printf(" %u: src_offset=%u src_stride=%u inst_div=%u vbuf=%u format=%s\n",
568 i,
569 draw->pt.vertex_element[i].src_offset,
570 draw->pt.vertex_element[i].src_stride,
571 draw->pt.vertex_element[i].instance_divisor,
572 draw->pt.vertex_element[i].vertex_buffer_index,
573 util_format_name(draw->pt.vertex_element[i].src_format));
574 }
575 debug_printf("Buffers:\n");
576 for (unsigned i = 0; i < draw->pt.nr_vertex_buffers; i++) {
577 debug_printf(" %u: offset=%u size=%d ptr=%p\n",
578 i,
579 draw->pt.vertex_buffer[i].buffer_offset,
580 (int) draw->pt.user.vbuffer[i].size,
581 draw->pt.user.vbuffer[i].map);
582 }
583 }
584
585 if (0) {
586 for (unsigned i = 0; i < num_draws; i++)
587 draw_print_arrays(draw, use_info->mode, use_draws[i].start,
588 MIN2(use_draws[i].count, 20),
589 use_info->index_bias_varies
590 ? use_draws[i].index_bias
591 : use_draws[0].index_bias);
592 }
593
594 unsigned index_limit = util_draw_max_index(draw->pt.vertex_buffer,
595 draw->pt.vertex_element,
596 draw->pt.nr_vertex_elements,
597 use_info);
598 #if DRAW_LLVM_AVAILABLE
599 if (!draw->llvm)
600 #endif
601 {
602 if (index_limit == 0) {
603 /* one of the buffers is too small to do any valid drawing */
604 debug_warning("draw: VBO too small to draw anything\n");
605 util_fpstate_set(fpstate);
606 return;
607 }
608 }
609
610 /* If we're collecting stats then make sure we start from scratch */
611 if (draw->collect_statistics) {
612 memset(&draw->statistics, 0, sizeof(draw->statistics));
613 }
614
615 draw->pt.max_index = index_limit - 1;
616
617 /*
618 * TODO: We could use draw->pt.max_index to further narrow
619 * the min_index/max_index hints given by gallium frontends.
620 */
621
622 if (use_info->view_mask) {
623 u_foreach_bit(i, use_info->view_mask) {
624 draw->pt.user.viewid = i;
625 draw_instances(draw, drawid_offset, use_info, use_draws, num_draws);
626 }
627 } else {
628 draw_instances(draw, drawid_offset, use_info, use_draws, num_draws);
629 }
630
631 /* If requested emit the pipeline statistics for this run */
632 if (draw->collect_statistics) {
633 draw->render->pipeline_statistics(draw->render, &draw->statistics);
634 }
635 util_fpstate_set(fpstate);
636 }
637
638 /* to be called after a mesh shader is run */
639 void
draw_mesh(struct draw_context * draw,struct draw_vertex_info * vert_info,struct draw_prim_info * prim_info)640 draw_mesh(struct draw_context *draw,
641 struct draw_vertex_info *vert_info,
642 struct draw_prim_info *prim_info)
643 {
644 struct draw_pt_middle_end *middle = draw->pt.middle.mesh;
645
646 draw->pt.user.eltSize = 0;
647 draw->pt.user.viewid = 0;
648 draw->pt.user.drawid = 0;
649 draw->pt.user.increment_draw_id = false;
650 draw->pt.vertices_per_patch = 0;
651
652 middle->prepare(middle, 0, 0, NULL);
653
654 draw_mesh_middle_end_run(middle, vert_info, prim_info);
655 }
656