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 **************************************************************************/
30 * Keith Whitwell <keith@tungstengraphics.com>
34 #include "util/u_math.h"
35 #include "util/u_memory.h"
36 #include "draw/draw_context.h"
37 #include "draw/draw_private.h"
38 #include "draw/draw_vbuf.h"
39 #include "draw/draw_vertex.h"
40 #include "draw/draw_pt.h"
41 #include "draw/draw_vs.h"
44 struct fetch_shade_emit
;
47 /* Prototype fetch, shade, emit-hw-verts all in one go.
49 struct fetch_shade_emit
{
50 struct draw_pt_middle_end base
;
51 struct draw_context
*draw
;
56 const float *constants
;
57 unsigned pitch
[PIPE_MAX_ATTRIBS
];
58 const ubyte
*src
[PIPE_MAX_ATTRIBS
];
61 struct draw_vs_varient_key key
;
62 struct draw_vs_varient
*active
;
65 const struct vertex_info
*vinfo
;
70 static void fse_prepare( struct draw_pt_middle_end
*middle
,
73 unsigned *max_vertices
)
75 struct fetch_shade_emit
*fse
= (struct fetch_shade_emit
*)middle
;
76 struct draw_context
*draw
= fse
->draw
;
77 unsigned num_vs_inputs
= draw
->vs
.vertex_shader
->info
.num_inputs
;
78 const struct vertex_info
*vinfo
;
82 /* Can't support geometry shader on this path.
84 assert(!draw
->gs
.geometry_shader
);
86 if (!draw
->render
->set_primitive( draw
->render
,
92 /* Must do this after set_primitive() above:
94 fse
->vinfo
= vinfo
= draw
->render
->get_vertex_info(draw
->render
);
97 fse
->key
.output_stride
= vinfo
->size
* 4;
98 fse
->key
.nr_outputs
= vinfo
->num_attribs
;
99 fse
->key
.nr_inputs
= num_vs_inputs
;
101 fse
->key
.nr_elements
= MAX2(fse
->key
.nr_outputs
, /* outputs - translate to hw format */
102 fse
->key
.nr_inputs
); /* inputs - fetch from api format */
104 fse
->key
.viewport
= !draw
->identity_viewport
;
105 fse
->key
.clip
= !draw
->bypass_clipping
;
106 fse
->key
.const_vbuffers
= 0;
108 memset(fse
->key
.element
, 0,
109 fse
->key
.nr_elements
* sizeof(fse
->key
.element
[0]));
111 for (i
= 0; i
< num_vs_inputs
; i
++) {
112 const struct pipe_vertex_element
*src
= &draw
->pt
.vertex_element
[i
];
113 fse
->key
.element
[i
].in
.format
= src
->src_format
;
115 /* Consider ignoring these, ie make generated programs
116 * independent of this state:
118 fse
->key
.element
[i
].in
.buffer
= src
->vertex_buffer_index
;
119 fse
->key
.element
[i
].in
.offset
= src
->src_offset
;
120 nr_vbs
= MAX2(nr_vbs
, src
->vertex_buffer_index
+ 1);
123 for (i
= 0; i
< 5 && i
< nr_vbs
; i
++) {
124 if (draw
->pt
.vertex_buffer
[i
].stride
== 0)
125 fse
->key
.const_vbuffers
|= (1<<i
);
128 if (0) debug_printf("%s: lookup const_vbuffers: %x\n", __FUNCTION__
, fse
->key
.const_vbuffers
);
131 unsigned dst_offset
= 0;
133 for (i
= 0; i
< vinfo
->num_attribs
; i
++) {
134 unsigned emit_sz
= draw_translate_vinfo_size(vinfo
->attrib
[i
].emit
);
136 /* doesn't handle EMIT_OMIT */
137 assert(emit_sz
!= 0);
139 /* The elements in the key correspond to vertex shader output
140 * numbers, not to positions in the hw vertex description --
141 * that's handled by the output_offset field.
143 fse
->key
.element
[i
].out
.format
= vinfo
->attrib
[i
].emit
;
144 fse
->key
.element
[i
].out
.vs_output
= vinfo
->attrib
[i
].src_index
;
145 fse
->key
.element
[i
].out
.offset
= dst_offset
;
147 dst_offset
+= emit_sz
;
148 assert(fse
->key
.output_stride
>= dst_offset
);
153 fse
->active
= draw_vs_lookup_varient( draw
->vs
.vertex_shader
,
161 if (0) debug_printf("%s: found const_vbuffers: %x\n", __FUNCTION__
,
162 fse
->active
->key
.const_vbuffers
);
164 /* Now set buffer pointers:
166 for (i
= 0; i
< draw
->pt
.nr_vertex_buffers
; i
++) {
167 fse
->active
->set_buffer( fse
->active
,
169 ((const ubyte
*) draw
->pt
.user
.vbuffer
[i
] +
170 draw
->pt
.vertex_buffer
[i
].buffer_offset
),
171 draw
->pt
.vertex_buffer
[i
].stride
,
172 draw
->pt
.vertex_buffer
[i
].max_index
);
175 *max_vertices
= (draw
->render
->max_vertex_buffer_bytes
/
178 /* Return an even number of verts.
179 * This prevents "parity" errors when splitting long triangle strips which
180 * can lead to front/back culling mix-ups.
181 * Every other triangle in a strip has an alternate front/back orientation
182 * so splitting at an odd position can cause the orientation of subsequent
183 * triangles to get reversed.
185 *max_vertices
= *max_vertices
& ~1;
187 /* Probably need to do this somewhere (or fix exec shader not to
191 struct draw_vertex_shader
*vs
= draw
->vs
.vertex_shader
;
192 vs
->prepare(vs
, draw
);
198 static void fse_run_linear( struct draw_pt_middle_end
*middle
,
202 struct fetch_shade_emit
*fse
= (struct fetch_shade_emit
*)middle
;
203 struct draw_context
*draw
= fse
->draw
;
206 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
208 draw_do_flush( draw
, DRAW_FLUSH_BACKEND
);
210 if (count
>= UNDEFINED_VERTEX_ID
)
213 if (!draw
->render
->allocate_vertices( draw
->render
,
214 (ushort
)fse
->key
.output_stride
,
218 hw_verts
= draw
->render
->map_vertices( draw
->render
);
222 /* Single routine to fetch vertices, run shader and emit HW verts.
223 * Clipping is done elsewhere -- either by the API or on hardware,
224 * or for some other reason not required...
226 fse
->active
->run_linear( fse
->active
,
233 for (i
= 0; i
< count
; i
++) {
234 debug_printf("\n\n%s vertex %d: (stride %d, offset %d)\n", __FUNCTION__
, i
,
235 fse
->key
.output_stride
,
236 fse
->key
.output_stride
* i
);
238 draw_dump_emitted_vertex( fse
->vinfo
,
239 (const uint8_t *)hw_verts
+ fse
->key
.output_stride
* i
);
243 draw
->render
->unmap_vertices( draw
->render
, 0, (ushort
)(count
- 1) );
245 /* Draw arrays path to avoid re-emitting index list again and
248 draw
->render
->draw_arrays( draw
->render
,
253 draw
->render
->release_vertices( draw
->render
);
264 fse_run(struct draw_pt_middle_end
*middle
,
265 const unsigned *fetch_elts
,
266 unsigned fetch_count
,
267 const ushort
*draw_elts
,
268 unsigned draw_count
)
270 struct fetch_shade_emit
*fse
= (struct fetch_shade_emit
*)middle
;
271 struct draw_context
*draw
= fse
->draw
;
274 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
276 draw_do_flush( draw
, DRAW_FLUSH_BACKEND
);
278 if (fetch_count
>= UNDEFINED_VERTEX_ID
)
281 if (!draw
->render
->allocate_vertices( draw
->render
,
282 (ushort
)fse
->key
.output_stride
,
283 (ushort
)fetch_count
))
286 hw_verts
= draw
->render
->map_vertices( draw
->render
);
291 /* Single routine to fetch vertices, run shader and emit HW verts.
293 fse
->active
->run_elts( fse
->active
,
301 for (i
= 0; i
< fetch_count
; i
++) {
302 debug_printf("\n\n%s vertex %d:\n", __FUNCTION__
, i
);
303 draw_dump_emitted_vertex( fse
->vinfo
,
304 (const uint8_t *)hw_verts
+
305 fse
->key
.output_stride
* i
);
309 draw
->render
->unmap_vertices( draw
->render
, 0, (ushort
)(fetch_count
- 1) );
311 draw
->render
->draw_elements( draw
->render
,
316 draw
->render
->release_vertices( draw
->render
);
326 static boolean
fse_run_linear_elts( struct draw_pt_middle_end
*middle
,
329 const ushort
*draw_elts
,
330 unsigned draw_count
)
332 struct fetch_shade_emit
*fse
= (struct fetch_shade_emit
*)middle
;
333 struct draw_context
*draw
= fse
->draw
;
336 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
338 draw_do_flush( draw
, DRAW_FLUSH_BACKEND
);
340 if (count
>= UNDEFINED_VERTEX_ID
)
343 if (!draw
->render
->allocate_vertices( draw
->render
,
344 (ushort
)fse
->key
.output_stride
,
348 hw_verts
= draw
->render
->map_vertices( draw
->render
);
352 /* Single routine to fetch vertices, run shader and emit HW verts.
353 * Clipping is done elsewhere -- either by the API or on hardware,
354 * or for some other reason not required...
356 fse
->active
->run_linear( fse
->active
,
361 draw
->render
->draw_elements( draw
->render
,
366 draw
->render
->unmap_vertices( draw
->render
, 0, (ushort
)(count
- 1) );
368 draw
->render
->release_vertices( draw
->render
);
375 static void fse_finish( struct draw_pt_middle_end
*middle
)
381 fse_destroy( struct draw_pt_middle_end
*middle
)
386 struct draw_pt_middle_end
*draw_pt_middle_fse( struct draw_context
*draw
)
388 struct fetch_shade_emit
*fse
= CALLOC_STRUCT(fetch_shade_emit
);
392 fse
->base
.prepare
= fse_prepare
;
393 fse
->base
.run
= fse_run
;
394 fse
->base
.run_linear
= fse_run_linear
;
395 fse
->base
.run_linear_elts
= fse_run_linear_elts
;
396 fse
->base
.finish
= fse_finish
;
397 fse
->base
.destroy
= fse_destroy
;