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
;
84 static const struct vertex_info
*
85 sp_vbuf_get_vertex_info(struct vbuf_render
*vbr
)
87 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
88 return softpipe_get_vbuf_vertex_info(cvbr
->softpipe
);
93 sp_vbuf_allocate_vertices(struct vbuf_render
*vbr
,
94 ushort vertex_size
, ushort nr_vertices
)
96 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
97 unsigned size
= vertex_size
* nr_vertices
;
99 if (cvbr
->vertex_buffer_size
< size
) {
100 align_free(cvbr
->vertex_buffer
);
101 cvbr
->vertex_buffer
= align_malloc(size
, 16);
102 cvbr
->vertex_buffer_size
= size
;
105 cvbr
->vertex_size
= vertex_size
;
106 cvbr
->nr_vertices
= nr_vertices
;
108 return cvbr
->vertex_buffer
!= NULL
;
112 sp_vbuf_release_vertices(struct vbuf_render
*vbr
)
114 /* keep the old allocation for next time */
118 sp_vbuf_map_vertices(struct vbuf_render
*vbr
)
120 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
121 return cvbr
->vertex_buffer
;
125 sp_vbuf_unmap_vertices(struct vbuf_render
*vbr
,
129 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
130 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
);
150 static INLINE cptrf4
get_vert( const void *vertex_buffer
,
154 return (cptrf4
)((char *)vertex_buffer
+ index
* stride
);
159 * draw elements / indexed primitives
162 sp_vbuf_draw(struct vbuf_render
*vbr
, const ushort
*indices
, uint nr
)
164 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
165 struct softpipe_context
*softpipe
= cvbr
->softpipe
;
166 const unsigned stride
= softpipe
->vertex_info_vbuf
.size
* sizeof(float);
167 const void *vertex_buffer
= cvbr
->vertex_buffer
;
168 struct setup_context
*setup_ctx
= cvbr
->setup
;
171 switch (cvbr
->prim
) {
172 case PIPE_PRIM_POINTS
:
173 for (i
= 0; i
< nr
; i
++) {
174 sp_setup_point( setup_ctx
,
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_ctx
,
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_ctx
,
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_ctx
,
198 get_vert(vertex_buffer
, indices
[i
-1], stride
),
199 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
202 sp_setup_line( setup_ctx
,
203 get_vert(vertex_buffer
, indices
[nr
-1], stride
),
204 get_vert(vertex_buffer
, indices
[0], stride
) );
208 case PIPE_PRIM_TRIANGLES
:
209 if (softpipe
->rasterizer
->flatshade_first
) {
210 for (i
= 2; i
< nr
; i
+= 3) {
211 sp_setup_tri( setup_ctx
,
212 get_vert(vertex_buffer
, indices
[i
-1], stride
),
213 get_vert(vertex_buffer
, indices
[i
-0], stride
),
214 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
218 for (i
= 2; i
< nr
; i
+= 3) {
219 sp_setup_tri( setup_ctx
,
220 get_vert(vertex_buffer
, indices
[i
-2], stride
),
221 get_vert(vertex_buffer
, indices
[i
-1], stride
),
222 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
227 case PIPE_PRIM_TRIANGLE_STRIP
:
228 if (softpipe
->rasterizer
->flatshade_first
) {
229 for (i
= 2; i
< nr
; i
+= 1) {
230 sp_setup_tri( setup_ctx
,
231 get_vert(vertex_buffer
, indices
[i
+(i
&1)-1], stride
),
232 get_vert(vertex_buffer
, indices
[i
-(i
&1)], stride
),
233 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
237 for (i
= 2; i
< nr
; i
+= 1) {
238 sp_setup_tri( setup_ctx
,
239 get_vert(vertex_buffer
, indices
[i
+(i
&1)-2], stride
),
240 get_vert(vertex_buffer
, indices
[i
-(i
&1)-1], stride
),
241 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
246 case PIPE_PRIM_TRIANGLE_FAN
:
247 if (softpipe
->rasterizer
->flatshade_first
) {
248 for (i
= 2; i
< nr
; i
+= 1) {
249 sp_setup_tri( setup_ctx
,
250 get_vert(vertex_buffer
, indices
[i
-0], stride
),
251 get_vert(vertex_buffer
, indices
[0], stride
),
252 get_vert(vertex_buffer
, indices
[i
-1], stride
) );
256 for (i
= 2; i
< nr
; i
+= 1) {
257 sp_setup_tri( setup_ctx
,
258 get_vert(vertex_buffer
, indices
[0], stride
),
259 get_vert(vertex_buffer
, indices
[i
-1], stride
),
260 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
265 case PIPE_PRIM_QUADS
:
266 if (softpipe
->rasterizer
->flatshade_first
) {
267 for (i
= 3; i
< nr
; i
+= 4) {
268 sp_setup_tri( setup_ctx
,
269 get_vert(vertex_buffer
, indices
[i
-2], stride
),
270 get_vert(vertex_buffer
, indices
[i
-1], stride
),
271 get_vert(vertex_buffer
, indices
[i
-3], stride
) );
272 sp_setup_tri( setup_ctx
,
273 get_vert(vertex_buffer
, indices
[i
-1], stride
),
274 get_vert(vertex_buffer
, indices
[i
-0], stride
),
275 get_vert(vertex_buffer
, indices
[i
-3], stride
) );
279 for (i
= 3; i
< nr
; i
+= 4) {
280 sp_setup_tri( setup_ctx
,
281 get_vert(vertex_buffer
, indices
[i
-3], stride
),
282 get_vert(vertex_buffer
, indices
[i
-2], stride
),
283 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
285 sp_setup_tri( setup_ctx
,
286 get_vert(vertex_buffer
, indices
[i
-2], stride
),
287 get_vert(vertex_buffer
, indices
[i
-1], stride
),
288 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
293 case PIPE_PRIM_QUAD_STRIP
:
294 if (softpipe
->rasterizer
->flatshade_first
) {
295 for (i
= 3; i
< nr
; i
+= 2) {
296 sp_setup_tri( setup_ctx
,
297 get_vert(vertex_buffer
, indices
[i
-0], stride
),
298 get_vert(vertex_buffer
, indices
[i
-1], stride
),
299 get_vert(vertex_buffer
, indices
[i
-3], stride
));
300 sp_setup_tri( setup_ctx
,
301 get_vert(vertex_buffer
, indices
[i
-2], stride
),
302 get_vert(vertex_buffer
, indices
[i
-0], stride
),
303 get_vert(vertex_buffer
, indices
[i
-3], stride
) );
307 for (i
= 3; i
< nr
; i
+= 2) {
308 sp_setup_tri( setup_ctx
,
309 get_vert(vertex_buffer
, indices
[i
-3], stride
),
310 get_vert(vertex_buffer
, indices
[i
-2], stride
),
311 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
312 sp_setup_tri( setup_ctx
,
313 get_vert(vertex_buffer
, indices
[i
-1], stride
),
314 get_vert(vertex_buffer
, indices
[i
-3], stride
),
315 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
320 case PIPE_PRIM_POLYGON
:
321 /* Almost same as tri fan but the _first_ vertex specifies the flat
322 * shading color. Note that the first polygon vertex is passed as
323 * the last triangle vertex here.
324 * flatshade_first state makes no difference.
326 for (i
= 2; i
< nr
; i
+= 1) {
327 sp_setup_tri( setup_ctx
,
328 get_vert(vertex_buffer
, indices
[i
-0], stride
),
329 get_vert(vertex_buffer
, indices
[i
-1], stride
),
330 get_vert(vertex_buffer
, indices
[0], stride
) );
341 * This function is hit when the draw module is working in pass-through mode.
342 * It's up to us to convert the vertex array into point/line/tri prims.
345 sp_vbuf_draw_arrays(struct vbuf_render
*vbr
, uint start
, uint nr
)
347 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
348 struct softpipe_context
*softpipe
= cvbr
->softpipe
;
349 struct setup_context
*setup_ctx
= cvbr
->setup
;
350 const unsigned stride
= softpipe
->vertex_info_vbuf
.size
* sizeof(float);
351 const void *vertex_buffer
=
352 (void *) get_vert(cvbr
->vertex_buffer
, start
, stride
);
355 switch (cvbr
->prim
) {
356 case PIPE_PRIM_POINTS
:
357 for (i
= 0; i
< nr
; i
++) {
358 sp_setup_point( setup_ctx
,
359 get_vert(vertex_buffer
, i
-0, stride
) );
363 case PIPE_PRIM_LINES
:
364 for (i
= 1; i
< nr
; i
+= 2) {
365 sp_setup_line( setup_ctx
,
366 get_vert(vertex_buffer
, i
-1, stride
),
367 get_vert(vertex_buffer
, i
-0, stride
) );
371 case PIPE_PRIM_LINE_STRIP
:
372 for (i
= 1; i
< nr
; i
++) {
373 sp_setup_line( setup_ctx
,
374 get_vert(vertex_buffer
, i
-1, stride
),
375 get_vert(vertex_buffer
, i
-0, stride
) );
379 case PIPE_PRIM_LINE_LOOP
:
380 for (i
= 1; i
< nr
; i
++) {
381 sp_setup_line( setup_ctx
,
382 get_vert(vertex_buffer
, i
-1, stride
),
383 get_vert(vertex_buffer
, i
-0, stride
) );
386 sp_setup_line( setup_ctx
,
387 get_vert(vertex_buffer
, nr
-1, stride
),
388 get_vert(vertex_buffer
, 0, stride
) );
392 case PIPE_PRIM_TRIANGLES
:
393 if (softpipe
->rasterizer
->flatshade_first
) {
394 for (i
= 2; i
< nr
; i
+= 3) {
395 sp_setup_tri( setup_ctx
,
396 get_vert(vertex_buffer
, i
-1, stride
),
397 get_vert(vertex_buffer
, i
-0, stride
),
398 get_vert(vertex_buffer
, i
-2, stride
) );
402 for (i
= 2; i
< nr
; i
+= 3) {
403 sp_setup_tri( setup_ctx
,
404 get_vert(vertex_buffer
, i
-2, stride
),
405 get_vert(vertex_buffer
, i
-1, stride
),
406 get_vert(vertex_buffer
, i
-0, stride
) );
411 case PIPE_PRIM_TRIANGLE_STRIP
:
412 if (softpipe
->rasterizer
->flatshade_first
) {
413 for (i
= 2; i
< nr
; i
++) {
414 sp_setup_tri( setup_ctx
,
415 get_vert(vertex_buffer
, i
+(i
&1)-1, stride
),
416 get_vert(vertex_buffer
, i
-(i
&1), stride
),
417 get_vert(vertex_buffer
, i
-2, stride
) );
421 for (i
= 2; i
< nr
; i
++) {
422 sp_setup_tri( setup_ctx
,
423 get_vert(vertex_buffer
, i
+(i
&1)-2, stride
),
424 get_vert(vertex_buffer
, i
-(i
&1)-1, stride
),
425 get_vert(vertex_buffer
, i
-0, stride
) );
430 case PIPE_PRIM_TRIANGLE_FAN
:
431 if (softpipe
->rasterizer
->flatshade_first
) {
432 for (i
= 2; i
< nr
; i
+= 1) {
433 sp_setup_tri( setup_ctx
,
434 get_vert(vertex_buffer
, i
-0, stride
),
435 get_vert(vertex_buffer
, 0, stride
),
436 get_vert(vertex_buffer
, i
-1, stride
) );
440 for (i
= 2; i
< nr
; i
+= 1) {
441 sp_setup_tri( setup_ctx
,
442 get_vert(vertex_buffer
, 0, stride
),
443 get_vert(vertex_buffer
, i
-1, stride
),
444 get_vert(vertex_buffer
, i
-0, stride
) );
449 case PIPE_PRIM_QUADS
:
450 if (softpipe
->rasterizer
->flatshade_first
) {
451 for (i
= 3; i
< nr
; i
+= 4) {
452 sp_setup_tri( setup_ctx
,
453 get_vert(vertex_buffer
, i
-2, stride
),
454 get_vert(vertex_buffer
, i
-1, stride
),
455 get_vert(vertex_buffer
, i
-3, stride
) );
456 sp_setup_tri( setup_ctx
,
457 get_vert(vertex_buffer
, i
-1, stride
),
458 get_vert(vertex_buffer
, i
-0, stride
),
459 get_vert(vertex_buffer
, i
-3, stride
) );
463 for (i
= 3; i
< nr
; i
+= 4) {
464 sp_setup_tri( setup_ctx
,
465 get_vert(vertex_buffer
, i
-3, stride
),
466 get_vert(vertex_buffer
, i
-2, stride
),
467 get_vert(vertex_buffer
, i
-0, stride
) );
468 sp_setup_tri( setup_ctx
,
469 get_vert(vertex_buffer
, i
-2, stride
),
470 get_vert(vertex_buffer
, i
-1, stride
),
471 get_vert(vertex_buffer
, i
-0, stride
) );
476 case PIPE_PRIM_QUAD_STRIP
:
477 if (softpipe
->rasterizer
->flatshade_first
) {
478 for (i
= 3; i
< nr
; i
+= 2) {
479 sp_setup_tri( setup_ctx
,
480 get_vert(vertex_buffer
, i
-0, stride
),
481 get_vert(vertex_buffer
, i
-1, stride
),
482 get_vert(vertex_buffer
, i
-3, stride
) );
483 sp_setup_tri( setup_ctx
,
484 get_vert(vertex_buffer
, i
-2, stride
),
485 get_vert(vertex_buffer
, i
-0, stride
),
486 get_vert(vertex_buffer
, i
-3, stride
) );
490 for (i
= 3; i
< nr
; i
+= 2) {
491 sp_setup_tri( setup_ctx
,
492 get_vert(vertex_buffer
, i
-3, stride
),
493 get_vert(vertex_buffer
, i
-2, stride
),
494 get_vert(vertex_buffer
, i
-0, stride
) );
495 sp_setup_tri( setup_ctx
,
496 get_vert(vertex_buffer
, i
-1, stride
),
497 get_vert(vertex_buffer
, i
-3, stride
),
498 get_vert(vertex_buffer
, i
-0, stride
) );
503 case PIPE_PRIM_POLYGON
:
504 /* Almost same as tri fan but the _first_ vertex specifies the flat
505 * shading color. Note that the first polygon vertex is passed as
506 * the last triangle vertex here.
507 * flatshade_first state makes no difference.
509 for (i
= 2; i
< nr
; i
+= 1) {
510 sp_setup_tri( setup_ctx
,
511 get_vert(vertex_buffer
, i
-1, stride
),
512 get_vert(vertex_buffer
, i
-0, stride
),
513 get_vert(vertex_buffer
, 0, stride
) );
525 sp_vbuf_destroy(struct vbuf_render
*vbr
)
527 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
528 sp_setup_destroy_context(cvbr
->setup
);
534 * Create the post-transform vertex handler for the given context.
537 sp_create_vbuf_backend(struct softpipe_context
*sp
)
539 struct softpipe_vbuf_render
*cvbr
= CALLOC_STRUCT(softpipe_vbuf_render
);
544 cvbr
->base
.max_indices
= SP_MAX_VBUF_INDEXES
;
545 cvbr
->base
.max_vertex_buffer_bytes
= SP_MAX_VBUF_SIZE
;
547 cvbr
->base
.get_vertex_info
= sp_vbuf_get_vertex_info
;
548 cvbr
->base
.allocate_vertices
= sp_vbuf_allocate_vertices
;
549 cvbr
->base
.map_vertices
= sp_vbuf_map_vertices
;
550 cvbr
->base
.unmap_vertices
= sp_vbuf_unmap_vertices
;
551 cvbr
->base
.set_primitive
= sp_vbuf_set_primitive
;
552 cvbr
->base
.draw
= sp_vbuf_draw
;
553 cvbr
->base
.draw_arrays
= sp_vbuf_draw_arrays
;
554 cvbr
->base
.release_vertices
= sp_vbuf_release_vertices
;
555 cvbr
->base
.destroy
= sp_vbuf_destroy
;
559 cvbr
->setup
= sp_setup_create_context(cvbr
->softpipe
);