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>
33 #include "draw/draw_context.h"
34 #include "draw/draw_private.h"
35 #include "draw/draw_pt.h"
37 static unsigned trim( unsigned count
, unsigned first
, unsigned incr
)
41 return count
- (count
- first
) % incr
;
46 /* Overall we split things into:
47 * - frontend -- prepare fetch_elts, draw_elts - eg vcache
48 * - middle -- fetch, shade, cliptest, viewport
49 * - pipeline -- the prim pipeline: clipping, wide lines, etc
50 * - backend -- the vbuf_render provided by the driver.
53 draw_pt_arrays(struct draw_context
*draw
,
58 struct draw_pt_front_end
*frontend
= NULL
;
59 struct draw_pt_middle_end
*middle
= NULL
;
62 /* Sanitize primitive length:
66 draw_pt_split_prim(prim
, &first
, &incr
);
67 count
= trim(count
, first
, incr
);
77 if (draw_need_pipeline(draw
,
83 if (!draw
->bypass_clipping
&& !draw
->pt
.test_fse
) {
87 if (!draw
->rasterizer
->bypass_vs
) {
93 middle
= draw
->pt
.middle
.fetch_emit
;
94 else if (opt
== PT_SHADE
&& !draw
->pt
.no_fse
)
95 middle
= draw
->pt
.middle
.fetch_shade_emit
;
97 middle
= draw
->pt
.middle
.general
;
100 /* Pick the right frontend
102 if (draw
->pt
.user
.elts
|| (opt
& PT_PIPELINE
)) {
103 frontend
= draw
->pt
.front
.vcache
;
105 frontend
= draw
->pt
.front
.varray
;
108 frontend
->prepare( frontend
, prim
, middle
, opt
);
110 frontend
->run(frontend
,
111 draw_pt_elt_func(draw
),
112 draw_pt_elt_ptr(draw
, start
),
115 frontend
->finish( frontend
);
121 boolean
draw_pt_init( struct draw_context
*draw
)
123 draw
->pt
.test_fse
= debug_get_bool_option("DRAW_FSE", FALSE
);
124 draw
->pt
.no_fse
= debug_get_bool_option("DRAW_NO_FSE", FALSE
);
126 draw
->pt
.front
.vcache
= draw_pt_vcache( draw
);
127 if (!draw
->pt
.front
.vcache
)
130 draw
->pt
.front
.varray
= draw_pt_varray(draw
);
131 if (!draw
->pt
.front
.varray
)
134 draw
->pt
.middle
.fetch_emit
= draw_pt_fetch_emit( draw
);
135 if (!draw
->pt
.middle
.fetch_emit
)
138 draw
->pt
.middle
.fetch_shade_emit
= draw_pt_middle_fse( draw
);
139 if (!draw
->pt
.middle
.fetch_shade_emit
)
142 draw
->pt
.middle
.general
= draw_pt_fetch_pipeline_or_emit( draw
);
143 if (!draw
->pt
.middle
.general
)
150 void draw_pt_destroy( struct draw_context
*draw
)
152 if (draw
->pt
.middle
.general
) {
153 draw
->pt
.middle
.general
->destroy( draw
->pt
.middle
.general
);
154 draw
->pt
.middle
.general
= NULL
;
157 if (draw
->pt
.middle
.fetch_emit
) {
158 draw
->pt
.middle
.fetch_emit
->destroy( draw
->pt
.middle
.fetch_emit
);
159 draw
->pt
.middle
.fetch_emit
= NULL
;
162 if (draw
->pt
.middle
.fetch_shade_emit
) {
163 draw
->pt
.middle
.fetch_shade_emit
->destroy( draw
->pt
.middle
.fetch_shade_emit
);
164 draw
->pt
.middle
.fetch_shade_emit
= NULL
;
167 if (draw
->pt
.front
.vcache
) {
168 draw
->pt
.front
.vcache
->destroy( draw
->pt
.front
.vcache
);
169 draw
->pt
.front
.vcache
= NULL
;
172 if (draw
->pt
.front
.varray
) {
173 draw
->pt
.front
.varray
->destroy( draw
->pt
.front
.varray
);
174 draw
->pt
.front
.varray
= NULL
;
183 * This is the main entrypoint into the drawing module.
184 * \param prim one of PIPE_PRIM_x
185 * \param start index of first vertex to draw
186 * \param count number of vertices to draw
189 draw_arrays(struct draw_context
*draw
, unsigned prim
,
190 unsigned start
, unsigned count
)
192 unsigned reduced_prim
= draw_pt_reduced_prim(prim
);
193 if (reduced_prim
!= draw
->reduced_prim
) {
194 draw_do_flush( draw
, DRAW_FLUSH_STATE_CHANGE
);
195 draw
->reduced_prim
= reduced_prim
;
198 /* drawing done here: */
199 draw_pt_arrays(draw
, prim
, start
, count
);
202 boolean
draw_pt_get_edgeflag( struct draw_context
*draw
,
205 if (draw
->pt
.user
.edgeflag
)
206 return (draw
->pt
.user
.edgeflag
[idx
/32] & (1 << (idx
%32))) != 0;