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 llvmpipe 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 "lp_setup_context.h"
40 #include "draw/draw_vbuf.h"
41 #include "draw/draw_vertex.h"
42 #include "util/u_memory.h"
45 #define LP_MAX_VBUF_INDEXES 1024
46 #define LP_MAX_VBUF_SIZE 4096
51 static struct lp_setup_context
*
52 lp_setup_context(struct vbuf_render
*vbr
)
54 return (struct lp_setup_context
*) vbr
;
59 static const struct vertex_info
*
60 lp_setup_get_vertex_info(struct vbuf_render
*vbr
)
62 struct lp_setup_context
*setup
= lp_setup_context(vbr
);
63 return setup
->vertex_info
;
68 lp_setup_allocate_vertices(struct vbuf_render
*vbr
,
69 ushort vertex_size
, ushort nr_vertices
)
71 struct lp_setup_context
*setup
= lp_setup_context(vbr
);
72 unsigned size
= vertex_size
* nr_vertices
;
74 if (setup
->vertex_buffer_size
< size
) {
75 align_free(setup
->vertex_buffer
);
76 setup
->vertex_buffer
= align_malloc(size
, 16);
77 setup
->vertex_buffer_size
= size
;
80 setup
->vertex_size
= vertex_size
;
81 setup
->nr_vertices
= nr_vertices
;
83 return setup
->vertex_buffer
!= NULL
;
87 lp_setup_release_vertices(struct vbuf_render
*vbr
)
89 /* keep the old allocation for next time */
93 lp_setup_map_vertices(struct vbuf_render
*vbr
)
95 struct lp_setup_context
*setup
= lp_setup_context(vbr
);
96 return setup
->vertex_buffer
;
100 lp_setup_unmap_vertices(struct vbuf_render
*vbr
,
104 struct lp_setup_context
*setup
= lp_setup_context(vbr
);
105 assert( setup
->vertex_buffer_size
>= (max_index
+1) * setup
->vertex_size
);
111 lp_setup_set_primitive(struct vbuf_render
*vbr
, unsigned prim
)
113 lp_setup_context(vbr
)->prim
= prim
;
117 typedef const float (*const_float4_ptr
)[4];
119 static INLINE const_float4_ptr
get_vert( const void *vertex_buffer
,
123 return (const_float4_ptr
)((char *)vertex_buffer
+ index
* stride
);
127 * draw elements / indexed primitives
130 lp_setup_draw(struct vbuf_render
*vbr
, const ushort
*indices
, uint nr
)
132 struct lp_setup_context
*setup
= lp_setup_context(vbr
);
133 const unsigned stride
= setup
->vertex_info
->size
* sizeof(float);
134 const void *vertex_buffer
= setup
->vertex_buffer
;
137 lp_setup_update_state(setup
);
139 switch (setup
->prim
) {
140 case PIPE_PRIM_POINTS
:
141 for (i
= 0; i
< nr
; i
++) {
143 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
147 case PIPE_PRIM_LINES
:
148 for (i
= 1; i
< nr
; i
+= 2) {
150 get_vert(vertex_buffer
, indices
[i
-1], stride
),
151 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
155 case PIPE_PRIM_LINE_STRIP
:
156 for (i
= 1; i
< nr
; i
++) {
158 get_vert(vertex_buffer
, indices
[i
-1], stride
),
159 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
163 case PIPE_PRIM_LINE_LOOP
:
164 for (i
= 1; i
< nr
; i
++) {
166 get_vert(vertex_buffer
, indices
[i
-1], stride
),
167 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
171 get_vert(vertex_buffer
, indices
[nr
-1], stride
),
172 get_vert(vertex_buffer
, indices
[0], stride
) );
176 case PIPE_PRIM_TRIANGLES
:
177 if (setup
->flatshade_first
) {
178 for (i
= 2; i
< nr
; i
+= 3) {
179 setup
->triangle( setup
,
180 get_vert(vertex_buffer
, indices
[i
-1], stride
),
181 get_vert(vertex_buffer
, indices
[i
-0], stride
),
182 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
186 for (i
= 2; i
< nr
; i
+= 3) {
187 setup
->triangle( setup
,
188 get_vert(vertex_buffer
, indices
[i
-2], stride
),
189 get_vert(vertex_buffer
, indices
[i
-1], stride
),
190 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
195 case PIPE_PRIM_TRIANGLE_STRIP
:
196 if (setup
->flatshade_first
) {
197 for (i
= 2; i
< nr
; i
+= 1) {
198 setup
->triangle( setup
,
199 get_vert(vertex_buffer
, indices
[i
+(i
&1)-1], stride
),
200 get_vert(vertex_buffer
, indices
[i
-(i
&1)], stride
),
201 get_vert(vertex_buffer
, indices
[i
-2], stride
) );
205 for (i
= 2; i
< nr
; i
+= 1) {
206 setup
->triangle( setup
,
207 get_vert(vertex_buffer
, indices
[i
+(i
&1)-2], stride
),
208 get_vert(vertex_buffer
, indices
[i
-(i
&1)-1], stride
),
209 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
214 case PIPE_PRIM_TRIANGLE_FAN
:
215 if (setup
->flatshade_first
) {
216 for (i
= 2; i
< nr
; i
+= 1) {
217 setup
->triangle( setup
,
218 get_vert(vertex_buffer
, indices
[i
-0], stride
),
219 get_vert(vertex_buffer
, indices
[0], stride
),
220 get_vert(vertex_buffer
, indices
[i
-1], stride
) );
224 for (i
= 2; i
< nr
; i
+= 1) {
225 setup
->triangle( setup
,
226 get_vert(vertex_buffer
, indices
[0], stride
),
227 get_vert(vertex_buffer
, indices
[i
-1], stride
),
228 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
233 case PIPE_PRIM_QUADS
:
234 for (i
= 3; i
< nr
; i
+= 4) {
235 setup
->triangle( setup
,
236 get_vert(vertex_buffer
, indices
[i
-3], stride
),
237 get_vert(vertex_buffer
, indices
[i
-2], stride
),
238 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
240 setup
->triangle( setup
,
241 get_vert(vertex_buffer
, indices
[i
-2], stride
),
242 get_vert(vertex_buffer
, indices
[i
-1], stride
),
243 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
247 case PIPE_PRIM_QUAD_STRIP
:
248 for (i
= 3; i
< nr
; i
+= 2) {
249 setup
->triangle( setup
,
250 get_vert(vertex_buffer
, indices
[i
-3], stride
),
251 get_vert(vertex_buffer
, indices
[i
-2], stride
),
252 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
253 setup
->triangle( setup
,
254 get_vert(vertex_buffer
, indices
[i
-1], stride
),
255 get_vert(vertex_buffer
, indices
[i
-3], stride
),
256 get_vert(vertex_buffer
, indices
[i
-0], stride
) );
260 case PIPE_PRIM_POLYGON
:
261 /* Almost same as tri fan but the _first_ vertex specifies the flat
262 * shading color. Note that the first polygon vertex is passed as
263 * the last triangle vertex here.
264 * flatshade_first state makes no difference.
266 for (i
= 2; i
< nr
; i
+= 1) {
267 setup
->triangle( setup
,
268 get_vert(vertex_buffer
, indices
[i
-0], stride
),
269 get_vert(vertex_buffer
, indices
[i
-1], stride
),
270 get_vert(vertex_buffer
, indices
[0], stride
) );
281 * This function is hit when the draw module is working in pass-through mode.
282 * It's up to us to convert the vertex array into point/line/tri prims.
285 lp_setup_draw_arrays(struct vbuf_render
*vbr
, uint start
, uint nr
)
287 struct lp_setup_context
*setup
= lp_setup_context(vbr
);
288 const unsigned stride
= setup
->vertex_info
->size
* sizeof(float);
289 const void *vertex_buffer
=
290 (void *) get_vert(setup
->vertex_buffer
, start
, stride
);
293 lp_setup_update_state(setup
);
295 switch (setup
->prim
) {
296 case PIPE_PRIM_POINTS
:
297 for (i
= 0; i
< nr
; i
++) {
299 get_vert(vertex_buffer
, i
-0, stride
) );
303 case PIPE_PRIM_LINES
:
304 for (i
= 1; i
< nr
; i
+= 2) {
306 get_vert(vertex_buffer
, i
-1, stride
),
307 get_vert(vertex_buffer
, i
-0, stride
) );
311 case PIPE_PRIM_LINE_STRIP
:
312 for (i
= 1; i
< nr
; i
++) {
314 get_vert(vertex_buffer
, i
-1, stride
),
315 get_vert(vertex_buffer
, i
-0, stride
) );
319 case PIPE_PRIM_LINE_LOOP
:
320 for (i
= 1; i
< nr
; i
++) {
322 get_vert(vertex_buffer
, i
-1, stride
),
323 get_vert(vertex_buffer
, i
-0, stride
) );
327 get_vert(vertex_buffer
, nr
-1, stride
),
328 get_vert(vertex_buffer
, 0, stride
) );
332 case PIPE_PRIM_TRIANGLES
:
333 if (setup
->flatshade_first
) {
334 for (i
= 2; i
< nr
; i
+= 3) {
335 setup
->triangle( setup
,
336 get_vert(vertex_buffer
, i
-1, stride
),
337 get_vert(vertex_buffer
, i
-0, stride
),
338 get_vert(vertex_buffer
, i
-2, stride
) );
342 for (i
= 2; i
< nr
; i
+= 3) {
343 setup
->triangle( setup
,
344 get_vert(vertex_buffer
, i
-2, stride
),
345 get_vert(vertex_buffer
, i
-1, stride
),
346 get_vert(vertex_buffer
, i
-0, stride
) );
351 case PIPE_PRIM_TRIANGLE_STRIP
:
352 if (setup
->flatshade_first
) {
353 for (i
= 2; i
< nr
; i
++) {
354 setup
->triangle( setup
,
355 get_vert(vertex_buffer
, i
+(i
&1)-1, stride
),
356 get_vert(vertex_buffer
, i
-(i
&1), stride
),
357 get_vert(vertex_buffer
, i
-2, stride
) );
361 for (i
= 2; i
< nr
; i
++) {
362 setup
->triangle( setup
,
363 get_vert(vertex_buffer
, i
+(i
&1)-2, stride
),
364 get_vert(vertex_buffer
, i
-(i
&1)-1, stride
),
365 get_vert(vertex_buffer
, i
-0, stride
) );
370 case PIPE_PRIM_TRIANGLE_FAN
:
371 if (setup
->flatshade_first
) {
372 for (i
= 2; i
< nr
; i
+= 1) {
373 setup
->triangle( setup
,
374 get_vert(vertex_buffer
, i
-0, stride
),
375 get_vert(vertex_buffer
, 0, stride
),
376 get_vert(vertex_buffer
, i
-1, stride
) );
380 for (i
= 2; i
< nr
; i
+= 1) {
381 setup
->triangle( setup
,
382 get_vert(vertex_buffer
, 0, stride
),
383 get_vert(vertex_buffer
, i
-1, stride
),
384 get_vert(vertex_buffer
, i
-0, stride
) );
389 case PIPE_PRIM_QUADS
:
390 for (i
= 3; i
< nr
; i
+= 4) {
391 setup
->triangle( setup
,
392 get_vert(vertex_buffer
, i
-3, stride
),
393 get_vert(vertex_buffer
, i
-2, stride
),
394 get_vert(vertex_buffer
, i
-0, stride
) );
395 setup
->triangle( setup
,
396 get_vert(vertex_buffer
, i
-2, stride
),
397 get_vert(vertex_buffer
, i
-1, stride
),
398 get_vert(vertex_buffer
, i
-0, stride
) );
402 case PIPE_PRIM_QUAD_STRIP
:
403 for (i
= 3; i
< nr
; i
+= 2) {
404 setup
->triangle( setup
,
405 get_vert(vertex_buffer
, i
-3, stride
),
406 get_vert(vertex_buffer
, i
-2, stride
),
407 get_vert(vertex_buffer
, i
-0, stride
) );
408 setup
->triangle( setup
,
409 get_vert(vertex_buffer
, i
-1, stride
),
410 get_vert(vertex_buffer
, i
-3, stride
),
411 get_vert(vertex_buffer
, i
-0, stride
) );
415 case PIPE_PRIM_POLYGON
:
416 /* Almost same as tri fan but the _first_ vertex specifies the flat
417 * shading color. Note that the first polygon vertex is passed as
418 * the last triangle vertex here.
419 * flatshade_first state makes no difference.
421 for (i
= 2; i
< nr
; i
+= 1) {
422 setup
->triangle( setup
,
423 get_vert(vertex_buffer
, i
-1, stride
),
424 get_vert(vertex_buffer
, i
-0, stride
),
425 get_vert(vertex_buffer
, 0, stride
) );
437 lp_setup_vbuf_destroy(struct vbuf_render
*vbr
)
439 lp_setup_destroy(lp_setup_context(vbr
));
444 * Create the post-transform vertex handler for the given context.
447 lp_setup_init_vbuf(struct lp_setup_context
*setup
)
449 setup
->base
.max_indices
= LP_MAX_VBUF_INDEXES
;
450 setup
->base
.max_vertex_buffer_bytes
= LP_MAX_VBUF_SIZE
;
452 setup
->base
.get_vertex_info
= lp_setup_get_vertex_info
;
453 setup
->base
.allocate_vertices
= lp_setup_allocate_vertices
;
454 setup
->base
.map_vertices
= lp_setup_map_vertices
;
455 setup
->base
.unmap_vertices
= lp_setup_unmap_vertices
;
456 setup
->base
.set_primitive
= lp_setup_set_primitive
;
457 setup
->base
.draw
= lp_setup_draw
;
458 setup
->base
.draw_arrays
= lp_setup_draw_arrays
;
459 setup
->base
.release_vertices
= lp_setup_release_vertices
;
460 setup
->base
.destroy
= lp_setup_vbuf_destroy
;