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[MSACM32]
[reactos.git] / reactos / dll / opengl / mesa / src / gallium / drivers / softpipe / sp_prim_vbuf.c
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 * Interface between 'draw' module's output and the softpipe rasterizer/setup
30 * code. When the 'draw' module has finished filling a vertex buffer, the
31 * draw_arrays() functions below will be called. Loop over the vertices and
32 * call the point/line/tri setup functions.
33 *
34 * Authors
35 * Brian Paul
36 */
37
38
39 #include "sp_context.h"
40 #include "sp_setup.h"
41 #include "sp_state.h"
42 #include "sp_prim_vbuf.h"
43 #include "draw/draw_context.h"
44 #include "draw/draw_vbuf.h"
45 #include "util/u_memory.h"
46 #include "util/u_prim.h"
47
48
49 #define SP_MAX_VBUF_INDEXES 1024
50 #define SP_MAX_VBUF_SIZE 4096
51
52 typedef const float (*cptrf4)[4];
53
54 /**
55 * Subclass of vbuf_render.
56 */
57 struct softpipe_vbuf_render
58 {
59 struct vbuf_render base;
60 struct softpipe_context *softpipe;
61 struct setup_context *setup;
62
63 uint prim;
64 uint vertex_size;
65 uint nr_vertices;
66 uint vertex_buffer_size;
67 void *vertex_buffer;
68 };
69
70
71 /** cast wrapper */
72 static struct softpipe_vbuf_render *
73 softpipe_vbuf_render(struct vbuf_render *vbr)
74 {
75 return (struct softpipe_vbuf_render *) vbr;
76 }
77
78
79 /** This tells the draw module about our desired vertex layout */
80 static const struct vertex_info *
81 sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
82 {
83 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
84 return softpipe_get_vbuf_vertex_info(cvbr->softpipe);
85 }
86
87
88 static boolean
89 sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
90 ushort vertex_size, ushort nr_vertices)
91 {
92 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
93 unsigned size = vertex_size * nr_vertices;
94
95 if (cvbr->vertex_buffer_size < size) {
96 align_free(cvbr->vertex_buffer);
97 cvbr->vertex_buffer = align_malloc(size, 16);
98 cvbr->vertex_buffer_size = size;
99 }
100
101 cvbr->vertex_size = vertex_size;
102 cvbr->nr_vertices = nr_vertices;
103
104 return cvbr->vertex_buffer != NULL;
105 }
106
107
108 static void
109 sp_vbuf_release_vertices(struct vbuf_render *vbr)
110 {
111 /* keep the old allocation for next time */
112 }
113
114
115 static void *
116 sp_vbuf_map_vertices(struct vbuf_render *vbr)
117 {
118 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
119 return cvbr->vertex_buffer;
120 }
121
122
123 static void
124 sp_vbuf_unmap_vertices(struct vbuf_render *vbr,
125 ushort min_index,
126 ushort max_index )
127 {
128 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
129 assert( cvbr->vertex_buffer_size >= (max_index+1) * cvbr->vertex_size );
130 (void) cvbr;
131 /* do nothing */
132 }
133
134
135 static void
136 sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
137 {
138 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
139 struct setup_context *setup_ctx = cvbr->setup;
140
141 sp_setup_prepare( setup_ctx );
142
143 cvbr->softpipe->reduced_prim = u_reduced_prim(prim);
144 cvbr->prim = prim;
145 }
146
147
148 static INLINE cptrf4 get_vert( const void *vertex_buffer,
149 int index,
150 int stride )
151 {
152 return (cptrf4)((char *)vertex_buffer + index * stride);
153 }
154
155
156 /**
157 * draw elements / indexed primitives
158 */
159 static void
160 sp_vbuf_draw_elements(struct vbuf_render *vbr, const ushort *indices, uint nr)
161 {
162 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
163 struct softpipe_context *softpipe = cvbr->softpipe;
164 const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
165 const void *vertex_buffer = cvbr->vertex_buffer;
166 struct setup_context *setup = cvbr->setup;
167 const boolean flatshade_first = softpipe->rasterizer->flatshade_first;
168 unsigned i;
169
170 switch (cvbr->prim) {
171 case PIPE_PRIM_POINTS:
172 for (i = 0; i < nr; i++) {
173 sp_setup_point( setup,
174 get_vert(vertex_buffer, indices[i-0], stride) );
175 }
176 break;
177
178 case PIPE_PRIM_LINES:
179 for (i = 1; i < nr; i += 2) {
180 sp_setup_line( setup,
181 get_vert(vertex_buffer, indices[i-1], stride),
182 get_vert(vertex_buffer, indices[i-0], stride) );
183 }
184 break;
185
186 case PIPE_PRIM_LINE_STRIP:
187 for (i = 1; i < nr; i ++) {
188 sp_setup_line( setup,
189 get_vert(vertex_buffer, indices[i-1], stride),
190 get_vert(vertex_buffer, indices[i-0], stride) );
191 }
192 break;
193
194 case PIPE_PRIM_LINE_LOOP:
195 for (i = 1; i < nr; i ++) {
196 sp_setup_line( setup,
197 get_vert(vertex_buffer, indices[i-1], stride),
198 get_vert(vertex_buffer, indices[i-0], stride) );
199 }
200 if (nr) {
201 sp_setup_line( setup,
202 get_vert(vertex_buffer, indices[nr-1], stride),
203 get_vert(vertex_buffer, indices[0], stride) );
204 }
205 break;
206
207 case PIPE_PRIM_TRIANGLES:
208 for (i = 2; i < nr; i += 3) {
209 sp_setup_tri( setup,
210 get_vert(vertex_buffer, indices[i-2], stride),
211 get_vert(vertex_buffer, indices[i-1], stride),
212 get_vert(vertex_buffer, indices[i-0], stride) );
213 }
214 break;
215
216 case PIPE_PRIM_TRIANGLE_STRIP:
217 if (flatshade_first) {
218 for (i = 2; i < nr; i += 1) {
219 /* emit first triangle vertex as first triangle vertex */
220 sp_setup_tri( setup,
221 get_vert(vertex_buffer, indices[i-2], stride),
222 get_vert(vertex_buffer, indices[i+(i&1)-1], stride),
223 get_vert(vertex_buffer, indices[i-(i&1)], stride) );
224
225 }
226 }
227 else {
228 for (i = 2; i < nr; i += 1) {
229 /* emit last triangle vertex as last triangle vertex */
230 sp_setup_tri( setup,
231 get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
232 get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
233 get_vert(vertex_buffer, indices[i-0], stride) );
234 }
235 }
236 break;
237
238 case PIPE_PRIM_TRIANGLE_FAN:
239 if (flatshade_first) {
240 for (i = 2; i < nr; i += 1) {
241 /* emit first non-spoke vertex as first vertex */
242 sp_setup_tri( setup,
243 get_vert(vertex_buffer, indices[i-1], stride),
244 get_vert(vertex_buffer, indices[i-0], stride),
245 get_vert(vertex_buffer, indices[0], stride) );
246 }
247 }
248 else {
249 for (i = 2; i < nr; i += 1) {
250 /* emit last non-spoke vertex as last vertex */
251 sp_setup_tri( setup,
252 get_vert(vertex_buffer, indices[0], stride),
253 get_vert(vertex_buffer, indices[i-1], stride),
254 get_vert(vertex_buffer, indices[i-0], stride) );
255 }
256 }
257 break;
258
259 case PIPE_PRIM_QUADS:
260 /* GL quads don't follow provoking vertex convention */
261 if (flatshade_first) {
262 /* emit last quad vertex as first triangle vertex */
263 for (i = 3; i < nr; i += 4) {
264 sp_setup_tri( setup,
265 get_vert(vertex_buffer, indices[i-0], stride),
266 get_vert(vertex_buffer, indices[i-3], stride),
267 get_vert(vertex_buffer, indices[i-2], stride) );
268
269 sp_setup_tri( setup,
270 get_vert(vertex_buffer, indices[i-0], stride),
271 get_vert(vertex_buffer, indices[i-2], stride),
272 get_vert(vertex_buffer, indices[i-1], stride) );
273 }
274 }
275 else {
276 /* emit last quad vertex as last triangle vertex */
277 for (i = 3; i < nr; i += 4) {
278 sp_setup_tri( setup,
279 get_vert(vertex_buffer, indices[i-3], stride),
280 get_vert(vertex_buffer, indices[i-2], stride),
281 get_vert(vertex_buffer, indices[i-0], stride) );
282
283 sp_setup_tri( setup,
284 get_vert(vertex_buffer, indices[i-2], stride),
285 get_vert(vertex_buffer, indices[i-1], stride),
286 get_vert(vertex_buffer, indices[i-0], stride) );
287 }
288 }
289 break;
290
291 case PIPE_PRIM_QUAD_STRIP:
292 /* GL quad strips don't follow provoking vertex convention */
293 if (flatshade_first) {
294 /* emit last quad vertex as first triangle vertex */
295 for (i = 3; i < nr; i += 2) {
296 sp_setup_tri( setup,
297 get_vert(vertex_buffer, indices[i-0], stride),
298 get_vert(vertex_buffer, indices[i-3], stride),
299 get_vert(vertex_buffer, indices[i-2], stride) );
300 sp_setup_tri( setup,
301 get_vert(vertex_buffer, indices[i-0], stride),
302 get_vert(vertex_buffer, indices[i-1], stride),
303 get_vert(vertex_buffer, indices[i-3], stride) );
304 }
305 }
306 else {
307 /* emit last quad vertex as last triangle vertex */
308 for (i = 3; i < nr; i += 2) {
309 sp_setup_tri( setup,
310 get_vert(vertex_buffer, indices[i-3], stride),
311 get_vert(vertex_buffer, indices[i-2], stride),
312 get_vert(vertex_buffer, indices[i-0], stride) );
313 sp_setup_tri( setup,
314 get_vert(vertex_buffer, indices[i-1], stride),
315 get_vert(vertex_buffer, indices[i-3], stride),
316 get_vert(vertex_buffer, indices[i-0], stride) );
317 }
318 }
319 break;
320
321 case PIPE_PRIM_POLYGON:
322 /* Almost same as tri fan but the _first_ vertex specifies the flat
323 * shading color.
324 */
325 if (flatshade_first) {
326 /* emit first polygon vertex as first triangle vertex */
327 for (i = 2; i < nr; i += 1) {
328 sp_setup_tri( setup,
329 get_vert(vertex_buffer, indices[0], stride),
330 get_vert(vertex_buffer, indices[i-1], stride),
331 get_vert(vertex_buffer, indices[i-0], stride) );
332 }
333 }
334 else {
335 /* emit first polygon vertex as last triangle vertex */
336 for (i = 2; i < nr; i += 1) {
337 sp_setup_tri( setup,
338 get_vert(vertex_buffer, indices[i-1], stride),
339 get_vert(vertex_buffer, indices[i-0], stride),
340 get_vert(vertex_buffer, indices[0], stride) );
341 }
342 }
343 break;
344
345 default:
346 assert(0);
347 }
348 }
349
350
351 /**
352 * This function is hit when the draw module is working in pass-through mode.
353 * It's up to us to convert the vertex array into point/line/tri prims.
354 */
355 static void
356 sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
357 {
358 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
359 struct softpipe_context *softpipe = cvbr->softpipe;
360 struct setup_context *setup = cvbr->setup;
361 const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
362 const void *vertex_buffer =
363 (void *) get_vert(cvbr->vertex_buffer, start, stride);
364 const boolean flatshade_first = softpipe->rasterizer->flatshade_first;
365 unsigned i;
366
367 switch (cvbr->prim) {
368 case PIPE_PRIM_POINTS:
369 for (i = 0; i < nr; i++) {
370 sp_setup_point( setup,
371 get_vert(vertex_buffer, i-0, stride) );
372 }
373 break;
374
375 case PIPE_PRIM_LINES:
376 for (i = 1; i < nr; i += 2) {
377 sp_setup_line( setup,
378 get_vert(vertex_buffer, i-1, stride),
379 get_vert(vertex_buffer, i-0, stride) );
380 }
381 break;
382
383 case PIPE_PRIM_LINE_STRIP:
384 for (i = 1; i < nr; i ++) {
385 sp_setup_line( setup,
386 get_vert(vertex_buffer, i-1, stride),
387 get_vert(vertex_buffer, i-0, stride) );
388 }
389 break;
390
391 case PIPE_PRIM_LINE_LOOP:
392 for (i = 1; i < nr; i ++) {
393 sp_setup_line( setup,
394 get_vert(vertex_buffer, i-1, stride),
395 get_vert(vertex_buffer, i-0, stride) );
396 }
397 if (nr) {
398 sp_setup_line( setup,
399 get_vert(vertex_buffer, nr-1, stride),
400 get_vert(vertex_buffer, 0, stride) );
401 }
402 break;
403
404 case PIPE_PRIM_TRIANGLES:
405 for (i = 2; i < nr; i += 3) {
406 sp_setup_tri( setup,
407 get_vert(vertex_buffer, i-2, stride),
408 get_vert(vertex_buffer, i-1, stride),
409 get_vert(vertex_buffer, i-0, stride) );
410 }
411 break;
412
413 case PIPE_PRIM_TRIANGLE_STRIP:
414 if (flatshade_first) {
415 for (i = 2; i < nr; i++) {
416 /* emit first triangle vertex as first triangle vertex */
417 sp_setup_tri( setup,
418 get_vert(vertex_buffer, i-2, stride),
419 get_vert(vertex_buffer, i+(i&1)-1, stride),
420 get_vert(vertex_buffer, i-(i&1), stride) );
421 }
422 }
423 else {
424 for (i = 2; i < nr; i++) {
425 /* emit last triangle vertex as last triangle vertex */
426 sp_setup_tri( setup,
427 get_vert(vertex_buffer, i+(i&1)-2, stride),
428 get_vert(vertex_buffer, i-(i&1)-1, stride),
429 get_vert(vertex_buffer, i-0, stride) );
430 }
431 }
432 break;
433
434 case PIPE_PRIM_TRIANGLE_FAN:
435 if (flatshade_first) {
436 for (i = 2; i < nr; i += 1) {
437 /* emit first non-spoke vertex as first vertex */
438 sp_setup_tri( setup,
439 get_vert(vertex_buffer, i-1, stride),
440 get_vert(vertex_buffer, i-0, stride),
441 get_vert(vertex_buffer, 0, stride) );
442 }
443 }
444 else {
445 for (i = 2; i < nr; i += 1) {
446 /* emit last non-spoke vertex as last vertex */
447 sp_setup_tri( setup,
448 get_vert(vertex_buffer, 0, stride),
449 get_vert(vertex_buffer, i-1, stride),
450 get_vert(vertex_buffer, i-0, stride) );
451 }
452 }
453 break;
454
455 case PIPE_PRIM_QUADS:
456 /* GL quads don't follow provoking vertex convention */
457 if (flatshade_first) {
458 /* emit last quad vertex as first triangle vertex */
459 for (i = 3; i < nr; i += 4) {
460 sp_setup_tri( setup,
461 get_vert(vertex_buffer, i-0, stride),
462 get_vert(vertex_buffer, i-3, stride),
463 get_vert(vertex_buffer, i-2, stride) );
464 sp_setup_tri( setup,
465 get_vert(vertex_buffer, i-0, stride),
466 get_vert(vertex_buffer, i-2, stride),
467 get_vert(vertex_buffer, i-1, stride) );
468 }
469 }
470 else {
471 /* emit last quad vertex as last triangle vertex */
472 for (i = 3; i < nr; i += 4) {
473 sp_setup_tri( setup,
474 get_vert(vertex_buffer, i-3, stride),
475 get_vert(vertex_buffer, i-2, stride),
476 get_vert(vertex_buffer, i-0, stride) );
477 sp_setup_tri( setup,
478 get_vert(vertex_buffer, i-2, stride),
479 get_vert(vertex_buffer, i-1, stride),
480 get_vert(vertex_buffer, i-0, stride) );
481 }
482 }
483 break;
484
485 case PIPE_PRIM_QUAD_STRIP:
486 /* GL quad strips don't follow provoking vertex convention */
487 if (flatshade_first) {
488 /* emit last quad vertex as first triangle vertex */
489 for (i = 3; i < nr; i += 2) {
490 sp_setup_tri( setup,
491 get_vert(vertex_buffer, i-0, stride),
492 get_vert(vertex_buffer, i-3, stride),
493 get_vert(vertex_buffer, i-2, stride) );
494 sp_setup_tri( setup,
495 get_vert(vertex_buffer, i-0, stride),
496 get_vert(vertex_buffer, i-1, stride),
497 get_vert(vertex_buffer, i-3, stride) );
498 }
499 }
500 else {
501 /* emit last quad vertex as last triangle vertex */
502 for (i = 3; i < nr; i += 2) {
503 sp_setup_tri( setup,
504 get_vert(vertex_buffer, i-3, stride),
505 get_vert(vertex_buffer, i-2, stride),
506 get_vert(vertex_buffer, i-0, stride) );
507 sp_setup_tri( setup,
508 get_vert(vertex_buffer, i-1, stride),
509 get_vert(vertex_buffer, i-3, stride),
510 get_vert(vertex_buffer, i-0, stride) );
511 }
512 }
513 break;
514
515 case PIPE_PRIM_POLYGON:
516 /* Almost same as tri fan but the _first_ vertex specifies the flat
517 * shading color.
518 */
519 if (flatshade_first) {
520 /* emit first polygon vertex as first triangle vertex */
521 for (i = 2; i < nr; i += 1) {
522 sp_setup_tri( setup,
523 get_vert(vertex_buffer, 0, stride),
524 get_vert(vertex_buffer, i-1, stride),
525 get_vert(vertex_buffer, i-0, stride) );
526 }
527 }
528 else {
529 /* emit first polygon vertex as last triangle vertex */
530 for (i = 2; i < nr; i += 1) {
531 sp_setup_tri( setup,
532 get_vert(vertex_buffer, i-1, stride),
533 get_vert(vertex_buffer, i-0, stride),
534 get_vert(vertex_buffer, 0, stride) );
535 }
536 }
537 break;
538
539 default:
540 assert(0);
541 }
542 }
543
544 static void
545 sp_vbuf_so_info(struct vbuf_render *vbr, uint primitives, uint vertices,
546 uint prim_generated)
547 {
548 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
549 struct softpipe_context *softpipe = cvbr->softpipe;
550
551 softpipe->so_stats.num_primitives_written += primitives;
552 softpipe->so_stats.primitives_storage_needed =
553 vertices * 4 /*sizeof(float|int32)*/ * 4 /*x,y,z,w*/;
554 softpipe->num_primitives_generated += prim_generated;
555 }
556
557
558 static void
559 sp_vbuf_destroy(struct vbuf_render *vbr)
560 {
561 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
562 if (cvbr->vertex_buffer)
563 align_free(cvbr->vertex_buffer);
564 sp_setup_destroy_context(cvbr->setup);
565 FREE(cvbr);
566 }
567
568
569 /**
570 * Create the post-transform vertex handler for the given context.
571 */
572 struct vbuf_render *
573 sp_create_vbuf_backend(struct softpipe_context *sp)
574 {
575 struct softpipe_vbuf_render *cvbr = CALLOC_STRUCT(softpipe_vbuf_render);
576
577 assert(sp->draw);
578
579 cvbr->base.max_indices = SP_MAX_VBUF_INDEXES;
580 cvbr->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
581
582 cvbr->base.get_vertex_info = sp_vbuf_get_vertex_info;
583 cvbr->base.allocate_vertices = sp_vbuf_allocate_vertices;
584 cvbr->base.map_vertices = sp_vbuf_map_vertices;
585 cvbr->base.unmap_vertices = sp_vbuf_unmap_vertices;
586 cvbr->base.set_primitive = sp_vbuf_set_primitive;
587 cvbr->base.draw_elements = sp_vbuf_draw_elements;
588 cvbr->base.draw_arrays = sp_vbuf_draw_arrays;
589 cvbr->base.release_vertices = sp_vbuf_release_vertices;
590 cvbr->base.set_stream_output_info = sp_vbuf_so_info;
591 cvbr->base.destroy = sp_vbuf_destroy;
592
593 cvbr->softpipe = sp;
594
595 cvbr->setup = sp_setup_create_context(cvbr->softpipe);
596
597 return &cvbr->base;
598 }
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