1 /**************************************************************************
3 * Copyright 2013 VMware, Inc.
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 VMWARE 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 **************************************************************************/
28 #include "draw_prim_assembler.h"
33 #include "util/u_debug.h"
34 #include "util/u_memory.h"
35 #include "util/u_prim.h"
37 #include "pipe/p_defines.h"
41 struct draw_context
*draw
;
43 struct draw_prim_info
*output_prims
;
44 struct draw_vertex_info
*output_verts
;
46 const struct draw_prim_info
*input_prims
;
47 const struct draw_vertex_info
*input_verts
;
54 boolean is_first_prim
;
60 needs_primid(const struct draw_context
*draw
)
62 const struct draw_fragment_shader
*fs
= draw
->fs
.fragment_shader
;
63 const struct draw_geometry_shader
*gs
= draw
->gs
.geometry_shader
;
64 if (fs
&& fs
->info
.uses_primid
) {
65 return !gs
|| !gs
->info
.uses_primid
;
71 draw_prim_assembler_is_required(const struct draw_context
*draw
,
72 const struct draw_prim_info
*prim_info
,
73 const struct draw_vertex_info
*vert_info
)
75 switch (prim_info
->prim
) {
76 case PIPE_PRIM_LINES_ADJACENCY
:
77 case PIPE_PRIM_LINE_STRIP_ADJACENCY
:
78 case PIPE_PRIM_TRIANGLES_ADJACENCY
:
79 case PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY
:
82 return needs_primid(draw
);
87 * Copy the vertex header along with its data from the current
88 * vertex buffer into a buffer holding vertices arranged
89 * into decomposed primitives (i.e. buffer without the
93 copy_verts(struct draw_assembler
*asmblr
,
94 unsigned *indices
, unsigned num_indices
)
98 char *output
= (char*)asmblr
->output_verts
->verts
;
99 const char *input
= (const char*)asmblr
->input_verts
->verts
;
101 for (i
= 0; i
< num_indices
; ++i
) {
102 unsigned idx
= indices
[i
];
103 unsigned output_offset
=
104 asmblr
->output_verts
->count
* asmblr
->output_verts
->stride
;
105 unsigned input_offset
= asmblr
->input_verts
->stride
* idx
;
106 memcpy(output
+ output_offset
, input
+ input_offset
,
107 asmblr
->input_verts
->vertex_size
);
108 asmblr
->output_verts
->count
+= 1;
115 inject_primid(struct draw_assembler
*asmblr
,
119 int slot
= asmblr
->primid_slot
;
120 char *input
= (char*)asmblr
->input_verts
->verts
;
121 unsigned input_offset
= asmblr
->input_verts
->stride
* idx
;
122 struct vertex_header
*v
= (struct vertex_header
*)(input
+ input_offset
);
124 /* In case the backend doesn't care about it */
129 memcpy(&v
->data
[slot
][0], &primid
, sizeof(primid
));
130 memcpy(&v
->data
[slot
][1], &primid
, sizeof(primid
));
131 memcpy(&v
->data
[slot
][2], &primid
, sizeof(primid
));
132 memcpy(&v
->data
[slot
][3], &primid
, sizeof(primid
));
137 prim_point(struct draw_assembler
*asmblr
,
142 if (asmblr
->needs_primid
) {
143 inject_primid(asmblr
, idx
, asmblr
->primid
++);
147 copy_verts(asmblr
, indices
, 1);
151 prim_line(struct draw_assembler
*asmblr
,
152 unsigned i0
, unsigned i1
)
156 if (asmblr
->needs_primid
) {
157 if (asmblr
->is_strip
&& asmblr
->is_first_prim
) {
158 inject_primid(asmblr
, i0
, asmblr
->primid
++);
159 inject_primid(asmblr
, i1
, asmblr
->primid
++);
160 asmblr
->is_first_prim
= FALSE
;
161 } else if (asmblr
->is_strip
) {
162 inject_primid(asmblr
, i1
, asmblr
->primid
++);
164 inject_primid(asmblr
, i0
, asmblr
->primid
);
165 inject_primid(asmblr
, i1
, asmblr
->primid
++);
171 copy_verts(asmblr
, indices
, 2);
175 prim_line_adj(struct draw_assembler
*asmblr
,
176 unsigned i0
, unsigned i1
, unsigned i2
, unsigned i3
)
180 if (asmblr
->needs_primid
) {
181 if (asmblr
->is_strip
&& asmblr
->is_first_prim
) {
182 inject_primid(asmblr
, i1
, asmblr
->primid
++);
183 inject_primid(asmblr
, i2
, asmblr
->primid
++);
184 asmblr
->is_first_prim
= FALSE
;
185 } else if (asmblr
->is_strip
) {
186 inject_primid(asmblr
, i2
, asmblr
->primid
++);
188 inject_primid(asmblr
, i1
, asmblr
->primid
);
189 inject_primid(asmblr
, i2
, asmblr
->primid
++);
196 copy_verts(asmblr
, indices
, 2);
200 prim_tri(struct draw_assembler
*asmblr
,
201 unsigned i0
, unsigned i1
, unsigned i2
)
205 if (asmblr
->needs_primid
) {
206 if (asmblr
->is_strip
&& asmblr
->is_first_prim
) {
207 inject_primid(asmblr
, i0
, asmblr
->primid
++);
208 inject_primid(asmblr
, i1
, asmblr
->primid
++);
209 inject_primid(asmblr
, i2
, asmblr
->primid
++);
210 asmblr
->is_first_prim
= FALSE
;
211 } else if (asmblr
->is_strip
) {
212 if (asmblr
->num_prims
& 1) {
213 inject_primid(asmblr
, i1
, asmblr
->primid
++);
215 inject_primid(asmblr
, i2
, asmblr
->primid
++);
218 inject_primid(asmblr
, i0
, asmblr
->primid
);
219 inject_primid(asmblr
, i1
, asmblr
->primid
);
220 inject_primid(asmblr
, i2
, asmblr
->primid
++);
227 copy_verts(asmblr
, indices
, 3);
231 prim_tri_adj(struct draw_assembler
*asmblr
,
232 unsigned i0
, unsigned i1
, unsigned i2
,
233 unsigned i3
, unsigned i4
, unsigned i5
)
237 if (asmblr
->needs_primid
) {
238 if (asmblr
->is_strip
&& asmblr
->is_first_prim
) {
239 inject_primid(asmblr
, i0
, asmblr
->primid
++);
240 inject_primid(asmblr
, i2
, asmblr
->primid
++);
241 inject_primid(asmblr
, i4
, asmblr
->primid
++);
242 asmblr
->is_first_prim
= FALSE
;
243 } else if (asmblr
->is_strip
) {
244 if (asmblr
->num_prims
& 1) {
245 inject_primid(asmblr
, i2
, asmblr
->primid
++);
247 inject_primid(asmblr
, i4
, asmblr
->primid
++);
250 inject_primid(asmblr
, i0
, asmblr
->primid
);
251 inject_primid(asmblr
, i2
, asmblr
->primid
);
252 inject_primid(asmblr
, i4
, asmblr
->primid
);
260 copy_verts(asmblr
, indices
, 3);
264 draw_prim_assembler_prepare_outputs(struct draw_assembler
*ia
)
266 struct draw_context
*draw
= ia
->draw
;
267 if (needs_primid(draw
)) {
268 ia
->primid_slot
= draw_alloc_extra_vertex_attrib(
269 ia
->draw
, TGSI_SEMANTIC_PRIMID
, 0);
271 ia
->primid_slot
= -1;
277 #define FUNC assembler_run_linear
278 #define GET_ELT(idx) (start + (idx))
279 #include "draw_prim_assembler_tmp.h"
281 #define FUNC assembler_run_elts
282 #define LOCAL_VARS const ushort *elts = input_prims->elts;
283 #define GET_ELT(idx) (elts[start + (idx)])
284 #include "draw_prim_assembler_tmp.h"
289 * Primitive assembler breaks up adjacency primitives and assembles
290 * the base primitives they represent, e.g. vertices forming
291 * PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY
292 * become vertices forming PIPE_PRIM_TRIANGLES
293 * This is needed because specification says that the adjacency
294 * primitives are only visible in the geometry shader so we need
295 * to get rid of them so that the rest of the pipeline can
296 * process the inputs.
299 draw_prim_assembler_run(struct draw_context
*draw
,
300 const struct draw_prim_info
*input_prims
,
301 const struct draw_vertex_info
*input_verts
,
302 struct draw_prim_info
*output_prims
,
303 struct draw_vertex_info
*output_verts
)
305 struct draw_assembler
*asmblr
= draw
->ia
;
307 unsigned assembled_prim
= u_assembled_prim(input_prims
->prim
);
308 unsigned max_primitives
= u_decomposed_prims_for_vertices(
309 input_prims
->prim
, input_prims
->count
);
310 unsigned max_verts
= u_vertices_per_prim(assembled_prim
) * max_primitives
;
312 asmblr
->output_prims
= output_prims
;
313 asmblr
->output_verts
= output_verts
;
314 asmblr
->input_prims
= input_prims
;
315 asmblr
->input_verts
= input_verts
;
317 (input_prims
->prim
== PIPE_PRIM_TRIANGLE_STRIP
||
318 input_prims
->prim
== PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY
) ||
319 (input_prims
->prim
== PIPE_PRIM_LINE_STRIP
||
320 input_prims
->prim
== PIPE_PRIM_LINE_STRIP_ADJACENCY
);
321 asmblr
->needs_primid
= needs_primid(asmblr
->draw
);
322 asmblr
->is_first_prim
= asmblr
->is_strip
;
324 asmblr
->num_prims
= 0;
326 output_prims
->linear
= TRUE
;
327 output_prims
->elts
= NULL
;
328 output_prims
->start
= 0;
329 output_prims
->prim
= u_assembled_prim(input_prims
->prim
);
330 output_prims
->flags
= 0x0;
331 output_prims
->primitive_lengths
= MALLOC(sizeof(unsigned));
332 output_prims
->primitive_lengths
[0] = 0;
333 output_prims
->primitive_count
= 1;
335 output_verts
->vertex_size
= input_verts
->vertex_size
;
336 output_verts
->stride
= input_verts
->stride
;
337 output_verts
->verts
= (struct vertex_header
*)MALLOC(
338 input_verts
->vertex_size
* max_verts
);
339 output_verts
->count
= 0;
342 for (start
= i
= 0; i
< input_prims
->primitive_count
;
343 start
+= input_prims
->primitive_lengths
[i
], i
++)
345 unsigned count
= input_prims
->primitive_lengths
[i
];
346 if (input_prims
->linear
) {
347 assembler_run_linear(asmblr
, input_prims
, input_verts
,
350 assembler_run_elts(asmblr
, input_prims
, input_verts
,
355 output_prims
->primitive_lengths
[0] = output_verts
->count
;
356 output_prims
->count
= output_verts
->count
;
359 struct draw_assembler
*
360 draw_prim_assembler_create(struct draw_context
*draw
)
362 struct draw_assembler
*ia
= CALLOC_STRUCT( draw_assembler
);
370 draw_prim_assembler_destroy(struct draw_assembler
*ia
)