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
);
148 static INLINE cptrf4
get_vert( const void *vertex_buffer
,
152 return (cptrf4
)((char *)vertex_buffer
+ index
* stride
);
157 * draw elements / indexed primitives
160 sp_vbuf_draw_elements(struct vbuf_render
*vbr
, const ushort
*indices
, uint nr
)
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
;
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
) );
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
) );
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
) );
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
) );
201 sp_setup_line( setup
,
202 get_vert(vertex_buffer
, indices
[nr
-1], stride
),
203 get_vert(vertex_buffer
, indices
[0], stride
) );
207 case PIPE_PRIM_TRIANGLES
:
208 for (i
= 2; i
< nr
; i
+= 3) {
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
) );
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 */
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
) );
228 for (i
= 2; i
< nr
; i
+= 1) {
229 /* emit last triangle vertex as last triangle vertex */
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
) );
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 */
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
) );
249 for (i
= 2; i
< nr
; i
+= 1) {
250 /* emit last non-spoke vertex as last vertex */
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
) );
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) {
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
) );
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
) );
276 /* emit last quad vertex as last triangle vertex */
277 for (i
= 3; i
< nr
; i
+= 4) {
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
) );
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
) );
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) {
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
) );
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
) );
307 /* emit last quad vertex as last triangle vertex */
308 for (i
= 3; i
< nr
; i
+= 2) {
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
) );
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
) );
321 case PIPE_PRIM_POLYGON
:
322 /* Almost same as tri fan but the _first_ vertex specifies the flat
325 if (flatshade_first
) {
326 /* emit first polygon vertex as first triangle vertex */
327 for (i
= 2; i
< nr
; i
+= 1) {
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
) );
335 /* emit first polygon vertex as last triangle vertex */
336 for (i
= 2; i
< nr
; i
+= 1) {
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
) );
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.
356 sp_vbuf_draw_arrays(struct vbuf_render
*vbr
, uint start
, uint nr
)
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
;
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
) );
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
) );
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
) );
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
) );
398 sp_setup_line( setup
,
399 get_vert(vertex_buffer
, nr
-1, stride
),
400 get_vert(vertex_buffer
, 0, stride
) );
404 case PIPE_PRIM_TRIANGLES
:
405 for (i
= 2; i
< nr
; i
+= 3) {
407 get_vert(vertex_buffer
, i
-2, stride
),
408 get_vert(vertex_buffer
, i
-1, stride
),
409 get_vert(vertex_buffer
, i
-0, stride
) );
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 */
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
) );
424 for (i
= 2; i
< nr
; i
++) {
425 /* emit last triangle vertex as last triangle vertex */
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
) );
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 */
439 get_vert(vertex_buffer
, i
-1, stride
),
440 get_vert(vertex_buffer
, i
-0, stride
),
441 get_vert(vertex_buffer
, 0, stride
) );
445 for (i
= 2; i
< nr
; i
+= 1) {
446 /* emit last non-spoke vertex as last vertex */
448 get_vert(vertex_buffer
, 0, stride
),
449 get_vert(vertex_buffer
, i
-1, stride
),
450 get_vert(vertex_buffer
, i
-0, stride
) );
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) {
461 get_vert(vertex_buffer
, i
-0, stride
),
462 get_vert(vertex_buffer
, i
-3, stride
),
463 get_vert(vertex_buffer
, i
-2, stride
) );
465 get_vert(vertex_buffer
, i
-0, stride
),
466 get_vert(vertex_buffer
, i
-2, stride
),
467 get_vert(vertex_buffer
, i
-1, stride
) );
471 /* emit last quad vertex as last triangle vertex */
472 for (i
= 3; i
< nr
; i
+= 4) {
474 get_vert(vertex_buffer
, i
-3, stride
),
475 get_vert(vertex_buffer
, i
-2, stride
),
476 get_vert(vertex_buffer
, i
-0, stride
) );
478 get_vert(vertex_buffer
, i
-2, stride
),
479 get_vert(vertex_buffer
, i
-1, stride
),
480 get_vert(vertex_buffer
, i
-0, stride
) );
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) {
491 get_vert(vertex_buffer
, i
-0, stride
),
492 get_vert(vertex_buffer
, i
-3, stride
),
493 get_vert(vertex_buffer
, i
-2, stride
) );
495 get_vert(vertex_buffer
, i
-0, stride
),
496 get_vert(vertex_buffer
, i
-1, stride
),
497 get_vert(vertex_buffer
, i
-3, stride
) );
501 /* emit last quad vertex as last triangle vertex */
502 for (i
= 3; i
< nr
; i
+= 2) {
504 get_vert(vertex_buffer
, i
-3, stride
),
505 get_vert(vertex_buffer
, i
-2, stride
),
506 get_vert(vertex_buffer
, i
-0, stride
) );
508 get_vert(vertex_buffer
, i
-1, stride
),
509 get_vert(vertex_buffer
, i
-3, stride
),
510 get_vert(vertex_buffer
, i
-0, stride
) );
515 case PIPE_PRIM_POLYGON
:
516 /* Almost same as tri fan but the _first_ vertex specifies the flat
519 if (flatshade_first
) {
520 /* emit first polygon vertex as first triangle vertex */
521 for (i
= 2; i
< nr
; i
+= 1) {
523 get_vert(vertex_buffer
, 0, stride
),
524 get_vert(vertex_buffer
, i
-1, stride
),
525 get_vert(vertex_buffer
, i
-0, stride
) );
529 /* emit first polygon vertex as last triangle vertex */
530 for (i
= 2; i
< nr
; i
+= 1) {
532 get_vert(vertex_buffer
, i
-1, stride
),
533 get_vert(vertex_buffer
, i
-0, stride
),
534 get_vert(vertex_buffer
, 0, stride
) );
545 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
;
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
;
559 sp_vbuf_destroy(struct vbuf_render
*vbr
)
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
);
570 * Create the post-transform vertex handler for the given context.
573 sp_create_vbuf_backend(struct softpipe_context
*sp
)
575 struct softpipe_vbuf_render
*cvbr
= CALLOC_STRUCT(softpipe_vbuf_render
);
579 cvbr
->base
.max_indices
= SP_MAX_VBUF_INDEXES
;
580 cvbr
->base
.max_vertex_buffer_bytes
= SP_MAX_VBUF_SIZE
;
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
;
595 cvbr
->setup
= sp_setup_create_context(cvbr
->softpipe
);