2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a 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, sublicense, 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
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "main/glheader.h"
34 #include "main/macros.h"
35 #include "main/enums.h"
37 #include "shader/program.h"
38 #include "intel_batchbuffer.h"
40 #include "brw_defines.h"
41 #include "brw_context.h"
46 static void brw_gs_alloc_regs( struct brw_gs_compile
*c
,
51 /* Register usage is static, precompute here:
53 c
->reg
.R0
= retype(brw_vec8_grf(i
, 0), BRW_REGISTER_TYPE_UD
); i
++;
55 /* Payload vertices plus space for more generated vertices:
57 for (j
= 0; j
< nr_verts
; j
++) {
58 c
->reg
.vertex
[j
] = brw_vec4_grf(i
, 0);
62 c
->prog_data
.urb_read_length
= c
->nr_regs
;
63 c
->prog_data
.total_grf
= i
;
67 static void brw_gs_emit_vue(struct brw_gs_compile
*c
,
72 struct brw_compile
*p
= &c
->func
;
73 GLboolean allocate
= !last
;
75 /* Overwrite PrimType and PrimStart in the message header, for
76 * each vertex in turn:
78 brw_MOV(p
, get_element_ud(c
->reg
.R0
, 2), brw_imm_ud(header
));
80 /* Copy the vertex from vertn into m1..mN+1:
82 brw_copy8(p
, brw_message_reg(1), vert
, c
->nr_regs
);
84 /* Send each vertex as a seperate write to the urb. This is
85 * different to the concept in brw_sf_emit.c, where subsequent
86 * writes are used to build up a single urb entry. Each of these
87 * writes instantiates a seperate urb entry, and a new one must be
88 * allocated each time.
91 allocate
? c
->reg
.R0
: retype(brw_null_reg(), BRW_REGISTER_TYPE_UD
),
96 c
->nr_regs
+ 1, /* msg length */
97 allocate
? 1 : 0, /* response length */
98 allocate
? 0 : 1, /* eot */
99 1, /* writes_complete */
101 BRW_URB_SWIZZLE_NONE
);
104 static void brw_gs_ff_sync(struct brw_gs_compile
*c
, int num_prim
)
106 struct brw_compile
*p
= &c
->func
;
107 brw_MOV(p
, get_element_ud(c
->reg
.R0
, 1), brw_imm_ud(num_prim
));
115 1, /* response length */
117 1, /* write compelete */
119 BRW_URB_SWIZZLE_NONE
);
123 void brw_gs_quads( struct brw_gs_compile
*c
, struct brw_gs_prog_key
*key
)
125 brw_gs_alloc_regs(c
, 4);
127 /* Use polygons for correct edgeflag behaviour. Note that vertex 3
128 * is the PV for quads, but vertex 0 for polygons:
131 brw_gs_ff_sync(c
, 1);
133 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_START
));
134 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 0, (_3DPRIM_POLYGON
<< 2));
135 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 0, (_3DPRIM_POLYGON
<< 2));
136 brw_gs_emit_vue(c
, c
->reg
.vertex
[3], 1, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_END
));
139 brw_gs_emit_vue(c
, c
->reg
.vertex
[3], 0, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_START
));
140 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, (_3DPRIM_POLYGON
<< 2));
141 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 0, (_3DPRIM_POLYGON
<< 2));
142 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 1, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_END
));
146 void brw_gs_quad_strip( struct brw_gs_compile
*c
, struct brw_gs_prog_key
*key
)
148 brw_gs_alloc_regs(c
, 4);
151 brw_gs_ff_sync(c
, 1);
153 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_START
));
154 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 0, (_3DPRIM_POLYGON
<< 2));
155 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 0, (_3DPRIM_POLYGON
<< 2));
156 brw_gs_emit_vue(c
, c
->reg
.vertex
[3], 1, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_END
));
159 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 0, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_START
));
160 brw_gs_emit_vue(c
, c
->reg
.vertex
[3], 0, (_3DPRIM_POLYGON
<< 2));
161 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, (_3DPRIM_POLYGON
<< 2));
162 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 1, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_END
));
166 void brw_gs_tris( struct brw_gs_compile
*c
)
168 brw_gs_alloc_regs(c
, 3);
171 brw_gs_ff_sync(c
, 1);
172 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, ((_3DPRIM_TRILIST
<< 2) | R02_PRIM_START
));
173 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 0, (_3DPRIM_TRILIST
<< 2));
174 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 1, ((_3DPRIM_TRILIST
<< 2) | R02_PRIM_END
));
177 void brw_gs_lines( struct brw_gs_compile
*c
)
179 brw_gs_alloc_regs(c
, 2);
182 brw_gs_ff_sync(c
, 1);
183 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, ((_3DPRIM_LINESTRIP
<< 2) | R02_PRIM_START
));
184 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 1, ((_3DPRIM_LINESTRIP
<< 2) | R02_PRIM_END
));
187 void brw_gs_points( struct brw_gs_compile
*c
)
189 brw_gs_alloc_regs(c
, 1);
192 brw_gs_ff_sync(c
, 1);
193 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 1, ((_3DPRIM_POINTLIST
<< 2) | R02_PRIM_START
| R02_PRIM_END
));