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 "brw_batchbuffer.h"
35 #include "brw_defines.h"
36 #include "brw_context.h"
40 static void brw_gs_alloc_regs( struct brw_gs_compile
*c
,
45 /* Register usage is static, precompute here:
47 c
->reg
.R0
= retype(brw_vec8_grf(i
, 0), BRW_REGISTER_TYPE_UD
); i
++;
49 /* Payload vertices plus space for more generated vertices:
51 for (j
= 0; j
< nr_verts
; j
++) {
52 c
->reg
.vertex
[j
] = brw_vec4_grf(i
, 0);
56 c
->prog_data
.urb_read_length
= c
->nr_regs
;
57 c
->prog_data
.total_grf
= i
;
61 static void brw_gs_emit_vue(struct brw_gs_compile
*c
,
66 struct brw_compile
*p
= &c
->func
;
67 GLboolean allocate
= !last
;
69 /* Overwrite PrimType and PrimStart in the message header, for
70 * each vertex in turn:
72 brw_MOV(p
, get_element_ud(c
->reg
.R0
, 2), brw_imm_ud(header
));
74 /* Copy the vertex from vertn into m1..mN+1:
76 brw_copy8(p
, brw_message_reg(1), vert
, c
->nr_regs
);
78 /* Send each vertex as a seperate write to the urb. This is
79 * different to the concept in brw_sf_emit.c, where subsequent
80 * writes are used to build up a single urb entry. Each of these
81 * writes instantiates a seperate urb entry, and a new one must be
82 * allocated each time.
85 allocate
? c
->reg
.R0
: retype(brw_null_reg(), BRW_REGISTER_TYPE_UD
),
90 c
->nr_regs
+ 1, /* msg length */
91 allocate
? 1 : 0, /* response length */
92 allocate
? 0 : 1, /* eot */
93 1, /* writes_complete */
95 BRW_URB_SWIZZLE_NONE
);
98 static void brw_gs_ff_sync(struct brw_gs_compile
*c
, int num_prim
)
100 struct brw_compile
*p
= &c
->func
;
101 brw_MOV(p
, get_element_ud(c
->reg
.R0
, 1), brw_imm_ud(num_prim
));
109 1, /* response length */
111 1, /* write compelete */
113 BRW_URB_SWIZZLE_NONE
);
117 void brw_gs_quads( struct brw_gs_compile
*c
)
119 brw_gs_alloc_regs(c
, 4);
121 /* Use polygons for correct edgeflag behaviour. Note that vertex 3
122 * is the PV for quads, but vertex 0 for polygons:
125 brw_gs_ff_sync(c
, 1);
126 brw_gs_emit_vue(c
, c
->reg
.vertex
[3], 0, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_START
));
127 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, (_3DPRIM_POLYGON
<< 2));
128 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 0, (_3DPRIM_POLYGON
<< 2));
129 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 1, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_END
));
132 void brw_gs_quad_strip( struct brw_gs_compile
*c
)
134 brw_gs_alloc_regs(c
, 4);
137 brw_gs_ff_sync(c
, 1);
138 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 0, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_START
));
139 brw_gs_emit_vue(c
, c
->reg
.vertex
[3], 0, (_3DPRIM_POLYGON
<< 2));
140 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, (_3DPRIM_POLYGON
<< 2));
141 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 1, ((_3DPRIM_POLYGON
<< 2) | R02_PRIM_END
));
144 void brw_gs_tris( struct brw_gs_compile
*c
)
146 brw_gs_alloc_regs(c
, 3);
149 brw_gs_ff_sync(c
, 1);
150 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, ((_3DPRIM_TRILIST
<< 2) | R02_PRIM_START
));
151 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 0, (_3DPRIM_TRILIST
<< 2));
152 brw_gs_emit_vue(c
, c
->reg
.vertex
[2], 1, ((_3DPRIM_TRILIST
<< 2) | R02_PRIM_END
));
155 void brw_gs_lines( struct brw_gs_compile
*c
)
157 brw_gs_alloc_regs(c
, 2);
160 brw_gs_ff_sync(c
, 1);
161 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 0, ((_3DPRIM_LINESTRIP
<< 2) | R02_PRIM_START
));
162 brw_gs_emit_vue(c
, c
->reg
.vertex
[1], 1, ((_3DPRIM_LINESTRIP
<< 2) | R02_PRIM_END
));
165 void brw_gs_points( struct brw_gs_compile
*c
)
167 brw_gs_alloc_regs(c
, 1);
170 brw_gs_ff_sync(c
, 1);
171 brw_gs_emit_vue(c
, c
->reg
.vertex
[0], 1, ((_3DPRIM_POINTLIST
<< 2) | R02_PRIM_START
| R02_PRIM_END
));