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(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_ctx
= cvbr
->setup
;
170 switch (cvbr
->prim
) {
171 case PIPE_PRIM_POINTS
:
172 for (i
= 0; i
< nr
; i
++) {
173 sp_setup_point( setup_ctx
,
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_ctx
,
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_ctx
,
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_ctx
,
197 get_vert(vertex_buffer
, indices
[i
-1], stride
),
198 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
201 sp_setup_line( setup_ctx
,
202 get_vert(vertex_buffer
, indices
[nr
-1], stride
),
203 get_vert(vertex_buffer
, indices
[0], stride
) );
207 case PIPE_PRIM_TRIANGLES
:
208 if (softpipe
->rasterizer
->flatshade_first
) {
209 for (i
= 2; i
< nr
; i
+= 3) {
210 sp_setup_tri( setup_ctx
,
211 get_vert(vertex_buffer
, indices
[i
-1], stride
),
212 get_vert(vertex_buffer
, indices
[i
-0], stride
),
213 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
217 for (i
= 2; i
< nr
; i
+= 3) {
218 sp_setup_tri( setup_ctx
,
219 get_vert(vertex_buffer
, indices
[i
-2], stride
),
220 get_vert(vertex_buffer
, indices
[i
-1], stride
),
221 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
226 case PIPE_PRIM_TRIANGLE_STRIP
:
227 if (softpipe
->rasterizer
->flatshade_first
) {
228 for (i
= 2; i
< nr
; i
+= 1) {
229 sp_setup_tri( setup_ctx
,
230 get_vert(vertex_buffer
, indices
[i
+(i
&1)-1], stride
),
231 get_vert(vertex_buffer
, indices
[i
-(i
&1)], stride
),
232 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
236 for (i
= 2; i
< nr
; i
+= 1) {
237 sp_setup_tri( setup_ctx
,
238 get_vert(vertex_buffer
, indices
[i
+(i
&1)-2], stride
),
239 get_vert(vertex_buffer
, indices
[i
-(i
&1)-1], stride
),
240 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
245 case PIPE_PRIM_TRIANGLE_FAN
:
246 if (softpipe
->rasterizer
->flatshade_first
) {
247 for (i
= 2; i
< nr
; i
+= 1) {
248 sp_setup_tri( setup_ctx
,
249 get_vert(vertex_buffer
, indices
[i
-0], stride
),
250 get_vert(vertex_buffer
, indices
[0], stride
),
251 get_vert(vertex_buffer
, indices
[i
-1], stride
) );
255 for (i
= 2; i
< nr
; i
+= 1) {
256 sp_setup_tri( setup_ctx
,
257 get_vert(vertex_buffer
, indices
[0], stride
),
258 get_vert(vertex_buffer
, indices
[i
-1], stride
),
259 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
264 case PIPE_PRIM_QUADS
:
265 for (i
= 3; i
< nr
; i
+= 4) {
266 sp_setup_tri( setup_ctx
,
267 get_vert(vertex_buffer
, indices
[i
-3], stride
),
268 get_vert(vertex_buffer
, indices
[i
-2], stride
),
269 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
271 sp_setup_tri( setup_ctx
,
272 get_vert(vertex_buffer
, indices
[i
-2], stride
),
273 get_vert(vertex_buffer
, indices
[i
-1], stride
),
274 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
278 case PIPE_PRIM_QUAD_STRIP
:
279 for (i
= 3; i
< nr
; i
+= 2) {
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
) );
284 sp_setup_tri( setup_ctx
,
285 get_vert(vertex_buffer
, indices
[i
-1], stride
),
286 get_vert(vertex_buffer
, indices
[i
-3], stride
),
287 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
291 case PIPE_PRIM_POLYGON
:
292 /* Almost same as tri fan but the _first_ vertex specifies the flat
293 * shading color. Note that the first polygon vertex is passed as
294 * the last triangle vertex here.
295 * flatshade_first state makes no difference.
297 for (i
= 2; i
< nr
; i
+= 1) {
298 sp_setup_tri( setup_ctx
,
299 get_vert(vertex_buffer
, indices
[i
-0], stride
),
300 get_vert(vertex_buffer
, indices
[i
-1], stride
),
301 get_vert(vertex_buffer
, indices
[0], stride
) );
312 * This function is hit when the draw module is working in pass-through mode.
313 * It's up to us to convert the vertex array into point/line/tri prims.
316 sp_vbuf_draw_arrays(struct vbuf_render
*vbr
, uint start
, uint nr
)
318 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
319 struct softpipe_context
*softpipe
= cvbr
->softpipe
;
320 struct setup_context
*setup_ctx
= cvbr
->setup
;
321 const unsigned stride
= softpipe
->vertex_info_vbuf
.size
* sizeof(float);
322 const void *vertex_buffer
=
323 (void *) get_vert(cvbr
->vertex_buffer
, start
, stride
);
326 switch (cvbr
->prim
) {
327 case PIPE_PRIM_POINTS
:
328 for (i
= 0; i
< nr
; i
++) {
329 sp_setup_point( setup_ctx
,
330 get_vert(vertex_buffer
, i
-0, stride
) );
334 case PIPE_PRIM_LINES
:
335 for (i
= 1; i
< nr
; i
+= 2) {
336 sp_setup_line( setup_ctx
,
337 get_vert(vertex_buffer
, i
-1, stride
),
338 get_vert(vertex_buffer
, i
-0, stride
) );
342 case PIPE_PRIM_LINE_STRIP
:
343 for (i
= 1; i
< nr
; i
++) {
344 sp_setup_line( setup_ctx
,
345 get_vert(vertex_buffer
, i
-1, stride
),
346 get_vert(vertex_buffer
, i
-0, stride
) );
350 case PIPE_PRIM_LINE_LOOP
:
351 for (i
= 1; i
< nr
; i
++) {
352 sp_setup_line( setup_ctx
,
353 get_vert(vertex_buffer
, i
-1, stride
),
354 get_vert(vertex_buffer
, i
-0, stride
) );
357 sp_setup_line( setup_ctx
,
358 get_vert(vertex_buffer
, nr
-1, stride
),
359 get_vert(vertex_buffer
, 0, stride
) );
363 case PIPE_PRIM_TRIANGLES
:
364 if (softpipe
->rasterizer
->flatshade_first
) {
365 for (i
= 2; i
< nr
; i
+= 3) {
366 sp_setup_tri( setup_ctx
,
367 get_vert(vertex_buffer
, i
-1, stride
),
368 get_vert(vertex_buffer
, i
-0, stride
),
369 get_vert(vertex_buffer
, i
-2, stride
) );
373 for (i
= 2; i
< nr
; i
+= 3) {
374 sp_setup_tri( setup_ctx
,
375 get_vert(vertex_buffer
, i
-2, stride
),
376 get_vert(vertex_buffer
, i
-1, stride
),
377 get_vert(vertex_buffer
, i
-0, stride
) );
382 case PIPE_PRIM_TRIANGLE_STRIP
:
383 if (softpipe
->rasterizer
->flatshade_first
) {
384 for (i
= 2; i
< nr
; i
++) {
385 sp_setup_tri( setup_ctx
,
386 get_vert(vertex_buffer
, i
+(i
&1)-1, stride
),
387 get_vert(vertex_buffer
, i
-(i
&1), stride
),
388 get_vert(vertex_buffer
, i
-2, stride
) );
392 for (i
= 2; i
< nr
; i
++) {
393 sp_setup_tri( setup_ctx
,
394 get_vert(vertex_buffer
, i
+(i
&1)-2, stride
),
395 get_vert(vertex_buffer
, i
-(i
&1)-1, stride
),
396 get_vert(vertex_buffer
, i
-0, stride
) );
401 case PIPE_PRIM_TRIANGLE_FAN
:
402 if (softpipe
->rasterizer
->flatshade_first
) {
403 for (i
= 2; i
< nr
; i
+= 1) {
404 sp_setup_tri( setup_ctx
,
405 get_vert(vertex_buffer
, i
-0, stride
),
406 get_vert(vertex_buffer
, 0, stride
),
407 get_vert(vertex_buffer
, i
-1, stride
) );
411 for (i
= 2; i
< nr
; i
+= 1) {
412 sp_setup_tri( setup_ctx
,
413 get_vert(vertex_buffer
, 0, stride
),
414 get_vert(vertex_buffer
, i
-1, stride
),
415 get_vert(vertex_buffer
, i
-0, stride
) );
420 case PIPE_PRIM_QUADS
:
421 for (i
= 3; i
< nr
; i
+= 4) {
422 sp_setup_tri( setup_ctx
,
423 get_vert(vertex_buffer
, i
-3, stride
),
424 get_vert(vertex_buffer
, i
-2, stride
),
425 get_vert(vertex_buffer
, i
-0, stride
) );
426 sp_setup_tri( setup_ctx
,
427 get_vert(vertex_buffer
, i
-2, stride
),
428 get_vert(vertex_buffer
, i
-1, stride
),
429 get_vert(vertex_buffer
, i
-0, stride
) );
433 case PIPE_PRIM_QUAD_STRIP
:
434 for (i
= 3; i
< nr
; i
+= 2) {
435 sp_setup_tri( setup_ctx
,
436 get_vert(vertex_buffer
, i
-3, stride
),
437 get_vert(vertex_buffer
, i
-2, stride
),
438 get_vert(vertex_buffer
, i
-0, stride
) );
439 sp_setup_tri( setup_ctx
,
440 get_vert(vertex_buffer
, i
-1, stride
),
441 get_vert(vertex_buffer
, i
-3, stride
),
442 get_vert(vertex_buffer
, i
-0, stride
) );
446 case PIPE_PRIM_POLYGON
:
447 /* Almost same as tri fan but the _first_ vertex specifies the flat
448 * shading color. Note that the first polygon vertex is passed as
449 * the last triangle vertex here.
450 * flatshade_first state makes no difference.
452 for (i
= 2; i
< nr
; i
+= 1) {
453 sp_setup_tri( setup_ctx
,
454 get_vert(vertex_buffer
, i
-1, stride
),
455 get_vert(vertex_buffer
, i
-0, stride
),
456 get_vert(vertex_buffer
, 0, stride
) );
467 sp_vbuf_destroy(struct vbuf_render
*vbr
)
469 struct softpipe_vbuf_render
*cvbr
= softpipe_vbuf_render(vbr
);
470 if (cvbr
->vertex_buffer
)
471 align_free(cvbr
->vertex_buffer
);
472 sp_setup_destroy_context(cvbr
->setup
);
478 * Create the post-transform vertex handler for the given context.
481 sp_create_vbuf_backend(struct softpipe_context
*sp
)
483 struct softpipe_vbuf_render
*cvbr
= CALLOC_STRUCT(softpipe_vbuf_render
);
487 cvbr
->base
.max_indices
= SP_MAX_VBUF_INDEXES
;
488 cvbr
->base
.max_vertex_buffer_bytes
= SP_MAX_VBUF_SIZE
;
490 cvbr
->base
.get_vertex_info
= sp_vbuf_get_vertex_info
;
491 cvbr
->base
.allocate_vertices
= sp_vbuf_allocate_vertices
;
492 cvbr
->base
.map_vertices
= sp_vbuf_map_vertices
;
493 cvbr
->base
.unmap_vertices
= sp_vbuf_unmap_vertices
;
494 cvbr
->base
.set_primitive
= sp_vbuf_set_primitive
;
495 cvbr
->base
.draw
= sp_vbuf_draw
;
496 cvbr
->base
.draw_arrays
= sp_vbuf_draw_arrays
;
497 cvbr
->base
.release_vertices
= sp_vbuf_release_vertices
;
498 cvbr
->base
.destroy
= sp_vbuf_destroy
;
502 cvbr
->setup
= sp_setup_create_context(cvbr
->softpipe
);