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
);
137 sp_vbuf_set_primitive(struct vbuf_render
*vbr
, unsigned prim
)
139 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
140 struct setup_context
*setup_ctx
= cvbr
->setup
;
142 sp_setup_prepare( setup_ctx
);
144 cvbr
->softpipe
->reduced_prim
= u_reduced_prim(prim
);
151 static INLINE cptrf4
get_vert( const void *vertex_buffer
,
155 return (cptrf4
)((char *)vertex_buffer
+ index
* stride
);
160 * draw elements / indexed primitives
163 sp_vbuf_draw(struct vbuf_render
*vbr
, const ushort
*indices
, uint nr
)
165 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
166 struct softpipe_context
*softpipe
= cvbr
->softpipe
;
167 const unsigned stride
= softpipe
->vertex_info_vbuf
.size
* sizeof(float);
168 const void *vertex_buffer
= cvbr
->vertex_buffer
;
169 struct setup_context
*setup_ctx
= cvbr
->setup
;
172 switch (cvbr
->prim
) {
173 case PIPE_PRIM_POINTS
:
174 for (i
= 0; i
< nr
; i
++) {
175 sp_setup_point( setup_ctx
,
176 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
180 case PIPE_PRIM_LINES
:
181 for (i
= 1; i
< nr
; i
+= 2) {
182 sp_setup_line( setup_ctx
,
183 get_vert(vertex_buffer
, indices
[i
-1], stride
),
184 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
188 case PIPE_PRIM_LINE_STRIP
:
189 for (i
= 1; i
< nr
; i
++) {
190 sp_setup_line( setup_ctx
,
191 get_vert(vertex_buffer
, indices
[i
-1], stride
),
192 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
196 case PIPE_PRIM_LINE_LOOP
:
197 for (i
= 1; i
< nr
; i
++) {
198 sp_setup_line( setup_ctx
,
199 get_vert(vertex_buffer
, indices
[i
-1], stride
),
200 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
203 sp_setup_line( setup_ctx
,
204 get_vert(vertex_buffer
, indices
[nr
-1], stride
),
205 get_vert(vertex_buffer
, indices
[0], stride
) );
209 case PIPE_PRIM_TRIANGLES
:
210 if (softpipe
->rasterizer
->flatshade_first
) {
211 for (i
= 2; i
< nr
; i
+= 3) {
212 sp_setup_tri( setup_ctx
,
213 get_vert(vertex_buffer
, indices
[i
-1], stride
),
214 get_vert(vertex_buffer
, indices
[i
-0], stride
),
215 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
219 for (i
= 2; i
< nr
; i
+= 3) {
220 sp_setup_tri( setup_ctx
,
221 get_vert(vertex_buffer
, indices
[i
-2], stride
),
222 get_vert(vertex_buffer
, indices
[i
-1], stride
),
223 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
228 case PIPE_PRIM_TRIANGLE_STRIP
:
229 if (softpipe
->rasterizer
->flatshade_first
) {
230 for (i
= 2; i
< nr
; i
+= 1) {
231 sp_setup_tri( setup_ctx
,
232 get_vert(vertex_buffer
, indices
[i
+(i
&1)-1], stride
),
233 get_vert(vertex_buffer
, indices
[i
-(i
&1)], stride
),
234 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
238 for (i
= 2; i
< nr
; i
+= 1) {
239 sp_setup_tri( setup_ctx
,
240 get_vert(vertex_buffer
, indices
[i
+(i
&1)-2], stride
),
241 get_vert(vertex_buffer
, indices
[i
-(i
&1)-1], stride
),
242 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
247 case PIPE_PRIM_TRIANGLE_FAN
:
248 if (softpipe
->rasterizer
->flatshade_first
) {
249 for (i
= 2; i
< nr
; i
+= 1) {
250 sp_setup_tri( setup_ctx
,
251 get_vert(vertex_buffer
, indices
[i
-0], stride
),
252 get_vert(vertex_buffer
, indices
[0], stride
),
253 get_vert(vertex_buffer
, indices
[i
-1], stride
) );
257 for (i
= 2; i
< nr
; i
+= 1) {
258 sp_setup_tri( setup_ctx
,
259 get_vert(vertex_buffer
, indices
[0], stride
),
260 get_vert(vertex_buffer
, indices
[i
-1], stride
),
261 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
266 case PIPE_PRIM_QUADS
:
267 for (i
= 3; i
< nr
; i
+= 4) {
268 sp_setup_tri( setup_ctx
,
269 get_vert(vertex_buffer
, indices
[i
-3], stride
),
270 get_vert(vertex_buffer
, indices
[i
-2], stride
),
271 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
273 sp_setup_tri( setup_ctx
,
274 get_vert(vertex_buffer
, indices
[i
-2], stride
),
275 get_vert(vertex_buffer
, indices
[i
-1], stride
),
276 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
280 case PIPE_PRIM_QUAD_STRIP
:
281 for (i
= 3; i
< nr
; i
+= 2) {
282 sp_setup_tri( setup_ctx
,
283 get_vert(vertex_buffer
, indices
[i
-3], stride
),
284 get_vert(vertex_buffer
, indices
[i
-2], stride
),
285 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
286 sp_setup_tri( setup_ctx
,
287 get_vert(vertex_buffer
, indices
[i
-1], stride
),
288 get_vert(vertex_buffer
, indices
[i
-3], stride
),
289 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
293 case PIPE_PRIM_POLYGON
:
294 /* Almost same as tri fan but the _first_ vertex specifies the flat
295 * shading color. Note that the first polygon vertex is passed as
296 * the last triangle vertex here.
297 * flatshade_first state makes no difference.
299 for (i
= 2; i
< nr
; i
+= 1) {
300 sp_setup_tri( setup_ctx
,
301 get_vert(vertex_buffer
, indices
[i
-0], stride
),
302 get_vert(vertex_buffer
, indices
[i
-1], stride
),
303 get_vert(vertex_buffer
, indices
[0], stride
) );
314 * This function is hit when the draw module is working in pass-through mode.
315 * It's up to us to convert the vertex array into point/line/tri prims.
318 sp_vbuf_draw_arrays(struct vbuf_render
*vbr
, uint start
, uint nr
)
320 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
321 struct softpipe_context
*softpipe
= cvbr
->softpipe
;
322 struct setup_context
*setup_ctx
= cvbr
->setup
;
323 const unsigned stride
= softpipe
->vertex_info_vbuf
.size
* sizeof(float);
324 const void *vertex_buffer
=
325 (void *) get_vert(cvbr
->vertex_buffer
, start
, stride
);
328 switch (cvbr
->prim
) {
329 case PIPE_PRIM_POINTS
:
330 for (i
= 0; i
< nr
; i
++) {
331 sp_setup_point( setup_ctx
,
332 get_vert(vertex_buffer
, i
-0, stride
) );
336 case PIPE_PRIM_LINES
:
337 for (i
= 1; i
< nr
; i
+= 2) {
338 sp_setup_line( setup_ctx
,
339 get_vert(vertex_buffer
, i
-1, stride
),
340 get_vert(vertex_buffer
, i
-0, stride
) );
344 case PIPE_PRIM_LINE_STRIP
:
345 for (i
= 1; i
< nr
; i
++) {
346 sp_setup_line( setup_ctx
,
347 get_vert(vertex_buffer
, i
-1, stride
),
348 get_vert(vertex_buffer
, i
-0, stride
) );
352 case PIPE_PRIM_LINE_LOOP
:
353 for (i
= 1; i
< nr
; i
++) {
354 sp_setup_line( setup_ctx
,
355 get_vert(vertex_buffer
, i
-1, stride
),
356 get_vert(vertex_buffer
, i
-0, stride
) );
359 sp_setup_line( setup_ctx
,
360 get_vert(vertex_buffer
, nr
-1, stride
),
361 get_vert(vertex_buffer
, 0, stride
) );
365 case PIPE_PRIM_TRIANGLES
:
366 if (softpipe
->rasterizer
->flatshade_first
) {
367 for (i
= 2; i
< nr
; i
+= 3) {
368 sp_setup_tri( setup_ctx
,
369 get_vert(vertex_buffer
, i
-1, stride
),
370 get_vert(vertex_buffer
, i
-0, stride
),
371 get_vert(vertex_buffer
, i
-2, stride
) );
375 for (i
= 2; i
< nr
; i
+= 3) {
376 sp_setup_tri( setup_ctx
,
377 get_vert(vertex_buffer
, i
-2, stride
),
378 get_vert(vertex_buffer
, i
-1, stride
),
379 get_vert(vertex_buffer
, i
-0, stride
) );
384 case PIPE_PRIM_TRIANGLE_STRIP
:
385 if (softpipe
->rasterizer
->flatshade_first
) {
386 for (i
= 2; i
< nr
; i
++) {
387 sp_setup_tri( setup_ctx
,
388 get_vert(vertex_buffer
, i
+(i
&1)-1, stride
),
389 get_vert(vertex_buffer
, i
-(i
&1), stride
),
390 get_vert(vertex_buffer
, i
-2, stride
) );
394 for (i
= 2; i
< nr
; i
++) {
395 sp_setup_tri( setup_ctx
,
396 get_vert(vertex_buffer
, i
+(i
&1)-2, stride
),
397 get_vert(vertex_buffer
, i
-(i
&1)-1, stride
),
398 get_vert(vertex_buffer
, i
-0, stride
) );
403 case PIPE_PRIM_TRIANGLE_FAN
:
404 if (softpipe
->rasterizer
->flatshade_first
) {
405 for (i
= 2; i
< nr
; i
+= 1) {
406 sp_setup_tri( setup_ctx
,
407 get_vert(vertex_buffer
, i
-0, stride
),
408 get_vert(vertex_buffer
, 0, stride
),
409 get_vert(vertex_buffer
, i
-1, stride
) );
413 for (i
= 2; i
< nr
; i
+= 1) {
414 sp_setup_tri( setup_ctx
,
415 get_vert(vertex_buffer
, 0, stride
),
416 get_vert(vertex_buffer
, i
-1, stride
),
417 get_vert(vertex_buffer
, i
-0, stride
) );
422 case PIPE_PRIM_QUADS
:
423 for (i
= 3; i
< nr
; i
+= 4) {
424 sp_setup_tri( setup_ctx
,
425 get_vert(vertex_buffer
, i
-3, stride
),
426 get_vert(vertex_buffer
, i
-2, stride
),
427 get_vert(vertex_buffer
, i
-0, stride
) );
428 sp_setup_tri( setup_ctx
,
429 get_vert(vertex_buffer
, i
-2, stride
),
430 get_vert(vertex_buffer
, i
-1, stride
),
431 get_vert(vertex_buffer
, i
-0, stride
) );
435 case PIPE_PRIM_QUAD_STRIP
:
436 for (i
= 3; i
< nr
; i
+= 2) {
437 sp_setup_tri( setup_ctx
,
438 get_vert(vertex_buffer
, i
-3, stride
),
439 get_vert(vertex_buffer
, i
-2, stride
),
440 get_vert(vertex_buffer
, i
-0, stride
) );
441 sp_setup_tri( setup_ctx
,
442 get_vert(vertex_buffer
, i
-1, stride
),
443 get_vert(vertex_buffer
, i
-3, stride
),
444 get_vert(vertex_buffer
, i
-0, stride
) );
448 case PIPE_PRIM_POLYGON
:
449 /* Almost same as tri fan but the _first_ vertex specifies the flat
450 * shading color. Note that the first polygon vertex is passed as
451 * the last triangle vertex here.
452 * flatshade_first state makes no difference.
454 for (i
= 2; i
< nr
; i
+= 1) {
455 sp_setup_tri( setup_ctx
,
456 get_vert(vertex_buffer
, i
-1, stride
),
457 get_vert(vertex_buffer
, i
-0, stride
),
458 get_vert(vertex_buffer
, 0, stride
) );
470 sp_vbuf_destroy(struct vbuf_render
*vbr
)
472 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
473 if(cvbr
->vertex_buffer
)
474 align_free(cvbr
->vertex_buffer
);
475 sp_setup_destroy_context(cvbr
->setup
);
481 * Create the post-transform vertex handler for the given context.
484 sp_create_vbuf_backend(struct softpipe_context
*sp
)
486 struct softpipe_vbuf_render
*cvbr
= CALLOC_STRUCT(softpipe_vbuf_render
);
490 cvbr
->base
.max_indices
= SP_MAX_VBUF_INDEXES
;
491 cvbr
->base
.max_vertex_buffer_bytes
= SP_MAX_VBUF_SIZE
;
493 cvbr
->base
.get_vertex_info
= sp_vbuf_get_vertex_info
;
494 cvbr
->base
.allocate_vertices
= sp_vbuf_allocate_vertices
;
495 cvbr
->base
.map_vertices
= sp_vbuf_map_vertices
;
496 cvbr
->base
.unmap_vertices
= sp_vbuf_unmap_vertices
;
497 cvbr
->base
.set_primitive
= sp_vbuf_set_primitive
;
498 cvbr
->base
.draw
= sp_vbuf_draw
;
499 cvbr
->base
.draw_arrays
= sp_vbuf_draw_arrays
;
500 cvbr
->base
.release_vertices
= sp_vbuf_release_vertices
;
501 cvbr
->base
.destroy
= sp_vbuf_destroy
;
505 cvbr
->setup
= sp_setup_create_context(cvbr
->softpipe
);