1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
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.
39 #include "sp_context.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"
49 #define SP_MAX_VBUF_INDEXES 1024
50 #define SP_MAX_VBUF_SIZE 4096
52 typedef const float (*cptrf4)[4];
55 * Subclass of vbuf_render.
57 struct softpipe_vbuf_render
59 struct vbuf_render base;
60 struct softpipe_context *softpipe;
61 struct setup_context *setup;
66 uint vertex_buffer_size;
72 static struct softpipe_vbuf_render *
73 softpipe_vbuf_render(struct vbuf_render *vbr)
75 return (struct softpipe_vbuf_render *) vbr;
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)
83 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
84 return softpipe_get_vbuf_vertex_info(cvbr->softpipe);
89 sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
90 ushort vertex_size, ushort nr_vertices)
92 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
93 unsigned size = vertex_size * nr_vertices;
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;
101 cvbr->vertex_size = vertex_size;
102 cvbr->nr_vertices = nr_vertices;
104 return cvbr->vertex_buffer != NULL;
109 sp_vbuf_release_vertices(struct vbuf_render *vbr)
111 /* keep the old allocation for next time */
116 sp_vbuf_map_vertices(struct vbuf_render *vbr)
118 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
119 return cvbr->vertex_buffer;
124 sp_vbuf_unmap_vertices(struct vbuf_render *vbr,
128 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
129 assert( cvbr->vertex_buffer_size >= (max_index+1) * cvbr->vertex_size );
136 sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
138 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
139 struct setup_context *setup_ctx = cvbr->setup;
141 sp_setup_prepare( setup_ctx );
143 cvbr->softpipe->reduced_prim = u_reduced_prim(prim);
149 static INLINE cptrf4 get_vert( const void *vertex_buffer,
153 return (cptrf4)((char *)vertex_buffer + index * stride);
158 * draw elements / indexed primitives
161 sp_vbuf_draw_elements(struct vbuf_render *vbr, const ushort *indices, uint nr)
163 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
164 struct softpipe_context *softpipe = cvbr->softpipe;
165 const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
166 const void *vertex_buffer = cvbr->vertex_buffer;
167 struct setup_context *setup = cvbr->setup;
168 const boolean flatshade_first = softpipe->rasterizer->flatshade_first;
171 switch (cvbr->prim) {
172 case PIPE_PRIM_POINTS:
173 for (i = 0; i < nr; i++) {
174 sp_setup_point( setup,
175 get_vert(vertex_buffer, indices[i-0], stride) );
179 case PIPE_PRIM_LINES:
180 for (i = 1; i < nr; i += 2) {
181 sp_setup_line( setup,
182 get_vert(vertex_buffer, indices[i-1], stride),
183 get_vert(vertex_buffer, indices[i-0], stride) );
187 case PIPE_PRIM_LINE_STRIP:
188 for (i = 1; i < nr; i ++) {
189 sp_setup_line( setup,
190 get_vert(vertex_buffer, indices[i-1], stride),
191 get_vert(vertex_buffer, indices[i-0], stride) );
195 case PIPE_PRIM_LINE_LOOP:
196 for (i = 1; i < nr; i ++) {
197 sp_setup_line( setup,
198 get_vert(vertex_buffer, indices[i-1], stride),
199 get_vert(vertex_buffer, indices[i-0], stride) );
202 sp_setup_line( setup,
203 get_vert(vertex_buffer, indices[nr-1], stride),
204 get_vert(vertex_buffer, indices[0], stride) );
208 case PIPE_PRIM_TRIANGLES:
209 for (i = 2; i < nr; i += 3) {
211 get_vert(vertex_buffer, indices[i-2], stride),
212 get_vert(vertex_buffer, indices[i-1], stride),
213 get_vert(vertex_buffer, indices[i-0], stride) );
217 case PIPE_PRIM_TRIANGLE_STRIP:
218 if (flatshade_first) {
219 for (i = 2; i < nr; i += 1) {
220 /* emit first triangle vertex as first triangle vertex */
222 get_vert(vertex_buffer, indices[i-2], stride),
223 get_vert(vertex_buffer, indices[i+(i&1)-1], stride),
224 get_vert(vertex_buffer, indices[i-(i&1)], stride) );
229 for (i = 2; i < nr; i += 1) {
230 /* emit last triangle vertex as last triangle vertex */
232 get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
233 get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
234 get_vert(vertex_buffer, indices[i-0], stride) );
239 case PIPE_PRIM_TRIANGLE_FAN:
240 if (flatshade_first) {
241 for (i = 2; i < nr; i += 1) {
242 /* emit first non-spoke vertex as first vertex */
244 get_vert(vertex_buffer, indices[i-1], stride),
245 get_vert(vertex_buffer, indices[i-0], stride),
246 get_vert(vertex_buffer, indices[0], stride) );
250 for (i = 2; i < nr; i += 1) {
251 /* emit last non-spoke vertex as last vertex */
253 get_vert(vertex_buffer, indices[0], stride),
254 get_vert(vertex_buffer, indices[i-1], stride),
255 get_vert(vertex_buffer, indices[i-0], stride) );
260 case PIPE_PRIM_QUADS:
261 /* GL quads don't follow provoking vertex convention */
262 if (flatshade_first) {
263 /* emit last quad vertex as first triangle vertex */
264 for (i = 3; i < nr; i += 4) {
266 get_vert(vertex_buffer, indices[i-0], stride),
267 get_vert(vertex_buffer, indices[i-3], stride),
268 get_vert(vertex_buffer, indices[i-2], stride) );
271 get_vert(vertex_buffer, indices[i-0], stride),
272 get_vert(vertex_buffer, indices[i-2], stride),
273 get_vert(vertex_buffer, indices[i-1], stride) );
277 /* emit last quad vertex as last triangle vertex */
278 for (i = 3; i < nr; i += 4) {
280 get_vert(vertex_buffer, indices[i-3], stride),
281 get_vert(vertex_buffer, indices[i-2], stride),
282 get_vert(vertex_buffer, indices[i-0], stride) );
285 get_vert(vertex_buffer, indices[i-2], stride),
286 get_vert(vertex_buffer, indices[i-1], stride),
287 get_vert(vertex_buffer, indices[i-0], stride) );
292 case PIPE_PRIM_QUAD_STRIP:
293 /* GL quad strips don't follow provoking vertex convention */
294 if (flatshade_first) {
295 /* emit last quad vertex as first triangle vertex */
296 for (i = 3; i < nr; i += 2) {
298 get_vert(vertex_buffer, indices[i-0], stride),
299 get_vert(vertex_buffer, indices[i-3], stride),
300 get_vert(vertex_buffer, indices[i-2], stride) );
302 get_vert(vertex_buffer, indices[i-0], stride),
303 get_vert(vertex_buffer, indices[i-1], stride),
304 get_vert(vertex_buffer, indices[i-3], stride) );
308 /* emit last quad vertex as last triangle vertex */
309 for (i = 3; i < nr; i += 2) {
311 get_vert(vertex_buffer, indices[i-3], stride),
312 get_vert(vertex_buffer, indices[i-2], stride),
313 get_vert(vertex_buffer, indices[i-0], stride) );
315 get_vert(vertex_buffer, indices[i-1], stride),
316 get_vert(vertex_buffer, indices[i-3], stride),
317 get_vert(vertex_buffer, indices[i-0], stride) );
322 case PIPE_PRIM_POLYGON:
323 /* Almost same as tri fan but the _first_ vertex specifies the flat
326 if (flatshade_first) {
327 /* emit first polygon vertex as first triangle vertex */
328 for (i = 2; i < nr; i += 1) {
330 get_vert(vertex_buffer, indices[0], stride),
331 get_vert(vertex_buffer, indices[i-1], stride),
332 get_vert(vertex_buffer, indices[i-0], stride) );
336 /* emit first polygon vertex as last triangle vertex */
337 for (i = 2; i < nr; i += 1) {
339 get_vert(vertex_buffer, indices[i-1], stride),
340 get_vert(vertex_buffer, indices[i-0], stride),
341 get_vert(vertex_buffer, indices[0], stride) );
353 * This function is hit when the draw module is working in pass-through mode.
354 * It's up to us to convert the vertex array into point/line/tri prims.
357 sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
359 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
360 struct softpipe_context *softpipe = cvbr->softpipe;
361 struct setup_context *setup = cvbr->setup;
362 const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
363 const void *vertex_buffer =
364 (void *) get_vert(cvbr->vertex_buffer, start, stride);
365 const boolean flatshade_first = softpipe->rasterizer->flatshade_first;
368 switch (cvbr->prim) {
369 case PIPE_PRIM_POINTS:
370 for (i = 0; i < nr; i++) {
371 sp_setup_point( setup,
372 get_vert(vertex_buffer, i-0, stride) );
376 case PIPE_PRIM_LINES:
377 for (i = 1; i < nr; i += 2) {
378 sp_setup_line( setup,
379 get_vert(vertex_buffer, i-1, stride),
380 get_vert(vertex_buffer, i-0, stride) );
384 case PIPE_PRIM_LINE_STRIP:
385 for (i = 1; i < nr; i ++) {
386 sp_setup_line( setup,
387 get_vert(vertex_buffer, i-1, stride),
388 get_vert(vertex_buffer, i-0, stride) );
392 case PIPE_PRIM_LINE_LOOP:
393 for (i = 1; i < nr; i ++) {
394 sp_setup_line( setup,
395 get_vert(vertex_buffer, i-1, stride),
396 get_vert(vertex_buffer, i-0, stride) );
399 sp_setup_line( setup,
400 get_vert(vertex_buffer, nr-1, stride),
401 get_vert(vertex_buffer, 0, stride) );
405 case PIPE_PRIM_TRIANGLES:
406 for (i = 2; i < nr; i += 3) {
408 get_vert(vertex_buffer, i-2, stride),
409 get_vert(vertex_buffer, i-1, stride),
410 get_vert(vertex_buffer, i-0, stride) );
414 case PIPE_PRIM_TRIANGLE_STRIP:
415 if (flatshade_first) {
416 for (i = 2; i < nr; i++) {
417 /* emit first triangle vertex as first triangle vertex */
419 get_vert(vertex_buffer, i-2, stride),
420 get_vert(vertex_buffer, i+(i&1)-1, stride),
421 get_vert(vertex_buffer, i-(i&1), stride) );
425 for (i = 2; i < nr; i++) {
426 /* emit last triangle vertex as last triangle vertex */
428 get_vert(vertex_buffer, i+(i&1)-2, stride),
429 get_vert(vertex_buffer, i-(i&1)-1, stride),
430 get_vert(vertex_buffer, i-0, stride) );
435 case PIPE_PRIM_TRIANGLE_FAN:
436 if (flatshade_first) {
437 for (i = 2; i < nr; i += 1) {
438 /* emit first non-spoke vertex as first vertex */
440 get_vert(vertex_buffer, i-1, stride),
441 get_vert(vertex_buffer, i-0, stride),
442 get_vert(vertex_buffer, 0, stride) );
446 for (i = 2; i < nr; i += 1) {
447 /* emit last non-spoke vertex as last vertex */
449 get_vert(vertex_buffer, 0, stride),
450 get_vert(vertex_buffer, i-1, stride),
451 get_vert(vertex_buffer, i-0, stride) );
456 case PIPE_PRIM_QUADS:
457 /* GL quads don't follow provoking vertex convention */
458 if (flatshade_first) {
459 /* emit last quad vertex as first triangle vertex */
460 for (i = 3; i < nr; i += 4) {
462 get_vert(vertex_buffer, i-0, stride),
463 get_vert(vertex_buffer, i-3, stride),
464 get_vert(vertex_buffer, i-2, stride) );
466 get_vert(vertex_buffer, i-0, stride),
467 get_vert(vertex_buffer, i-2, stride),
468 get_vert(vertex_buffer, i-1, stride) );
472 /* emit last quad vertex as last triangle vertex */
473 for (i = 3; i < nr; i += 4) {
475 get_vert(vertex_buffer, i-3, stride),
476 get_vert(vertex_buffer, i-2, stride),
477 get_vert(vertex_buffer, i-0, stride) );
479 get_vert(vertex_buffer, i-2, stride),
480 get_vert(vertex_buffer, i-1, stride),
481 get_vert(vertex_buffer, i-0, stride) );
486 case PIPE_PRIM_QUAD_STRIP:
487 /* GL quad strips don't follow provoking vertex convention */
488 if (flatshade_first) {
489 /* emit last quad vertex as first triangle vertex */
490 for (i = 3; i < nr; i += 2) {
492 get_vert(vertex_buffer, i-0, stride),
493 get_vert(vertex_buffer, i-3, stride),
494 get_vert(vertex_buffer, i-2, stride) );
496 get_vert(vertex_buffer, i-0, stride),
497 get_vert(vertex_buffer, i-1, stride),
498 get_vert(vertex_buffer, i-3, stride) );
502 /* emit last quad vertex as last triangle vertex */
503 for (i = 3; i < nr; i += 2) {
505 get_vert(vertex_buffer, i-3, stride),
506 get_vert(vertex_buffer, i-2, stride),
507 get_vert(vertex_buffer, i-0, stride) );
509 get_vert(vertex_buffer, i-1, stride),
510 get_vert(vertex_buffer, i-3, stride),
511 get_vert(vertex_buffer, i-0, stride) );
516 case PIPE_PRIM_POLYGON:
517 /* Almost same as tri fan but the _first_ vertex specifies the flat
520 if (flatshade_first) {
521 /* emit first polygon vertex as first triangle vertex */
522 for (i = 2; i < nr; i += 1) {
524 get_vert(vertex_buffer, 0, stride),
525 get_vert(vertex_buffer, i-1, stride),
526 get_vert(vertex_buffer, i-0, stride) );
530 /* emit first polygon vertex as last triangle vertex */
531 for (i = 2; i < nr; i += 1) {
533 get_vert(vertex_buffer, i-1, stride),
534 get_vert(vertex_buffer, i-0, stride),
535 get_vert(vertex_buffer, 0, stride) );
546 sp_vbuf_so_info(struct vbuf_render *vbr, uint primitives, uint vertices)
548 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
549 struct softpipe_context *softpipe = cvbr->softpipe;
552 for (i = 0; i < softpipe->so_target.num_buffers; ++i) {
553 softpipe->so_target.so_count[i] += vertices;
556 softpipe->so_stats.num_primitives_written = primitives;
557 softpipe->so_stats.primitives_storage_needed =
558 vertices * 4 /*sizeof(float|int32)*/ * 4 /*x,y,z,w*/;
563 sp_vbuf_destroy(struct vbuf_render *vbr)
565 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
566 if (cvbr->vertex_buffer)
567 align_free(cvbr->vertex_buffer);
568 sp_setup_destroy_context(cvbr->setup);
574 * Create the post-transform vertex handler for the given context.
577 sp_create_vbuf_backend(struct softpipe_context *sp)
579 struct softpipe_vbuf_render *cvbr = CALLOC_STRUCT(softpipe_vbuf_render);
583 cvbr->base.max_indices = SP_MAX_VBUF_INDEXES;
584 cvbr->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
586 cvbr->base.get_vertex_info = sp_vbuf_get_vertex_info;
587 cvbr->base.allocate_vertices = sp_vbuf_allocate_vertices;
588 cvbr->base.map_vertices = sp_vbuf_map_vertices;
589 cvbr->base.unmap_vertices = sp_vbuf_unmap_vertices;
590 cvbr->base.set_primitive = sp_vbuf_set_primitive;
591 cvbr->base.draw_elements = sp_vbuf_draw_elements;
592 cvbr->base.draw_arrays = sp_vbuf_draw_arrays;
593 cvbr->base.release_vertices = sp_vbuf_release_vertices;
594 cvbr->base.set_stream_output_info = sp_vbuf_so_info;
595 cvbr->base.destroy = sp_vbuf_destroy;
599 cvbr->setup = sp_setup_create_context(cvbr->softpipe);