9830a43ba55c7d493b297286e562eeb7a1d0397e
1 /**************************************************************************
3 * Copyright 2007-2010 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
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14 * The above copyright notice and this permission notice (including the
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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 **************************************************************************/
29 * Rasterization for binned triangles within a tile
35 * Prototype for a 8 plane rasterizer function. Will codegenerate
38 * XXX: Varients for more/fewer planes.
39 * XXX: Need ways of dropping planes as we descend.
43 TAG(do_block_4
)(struct lp_rasterizer_task
*task
,
44 const struct lp_rast_triangle
*tri
,
45 const struct lp_rast_plane
*plane
,
49 unsigned mask
= 0xffff;
52 for (j
= 0; j
< NR_PLANES
; j
++) {
53 mask
&= ~build_mask_linear(c
[j
] - 1,
58 /* Now pass to the shader:
61 lp_rast_shade_quads_mask(task
, &tri
->inputs
, x
, y
, mask
);
65 * Evaluate a 16x16 block of pixels to determine which 4x4 subblocks are in/out
66 * of the triangle's bounds.
69 TAG(do_block_16
)(struct lp_rasterizer_task
*task
,
70 const struct lp_rast_triangle
*tri
,
71 const struct lp_rast_plane
*plane
,
75 unsigned outmask
, inmask
, partmask
, partial_mask
;
78 outmask
= 0; /* outside one or more trivial reject planes */
79 partmask
= 0; /* outside one or more trivial accept planes */
81 for (j
= 0; j
< NR_PLANES
; j
++) {
82 const int dcdx
= -plane
[j
].dcdx
* 4;
83 const int dcdy
= plane
[j
].dcdy
* 4;
84 const int cox
= plane
[j
].eo
* 4;
85 const int cio
= plane
[j
].ei
* 4 - 1;
87 build_masks(c
[j
] + cox
,
90 &outmask
, /* sign bits from c[i][0..15] + cox */
91 &partmask
); /* sign bits from c[i][0..15] + cio */
94 if (outmask
== 0xffff)
97 /* Mask of sub-blocks which are inside all trivial accept planes:
99 inmask
= ~partmask
& 0xffff;
101 /* Mask of sub-blocks which are inside all trivial reject planes,
102 * but outside at least one trivial accept plane:
104 partial_mask
= partmask
& ~outmask
;
106 assert((partial_mask
& inmask
) == 0);
108 LP_COUNT_ADD(nr_empty_4
, util_bitcount(0xffff & ~(partial_mask
| inmask
)));
110 /* Iterate over partials:
112 while (partial_mask
) {
113 int i
= ffs(partial_mask
) - 1;
114 int ix
= (i
& 3) * 4;
115 int iy
= (i
>> 2) * 4;
120 partial_mask
&= ~(1 << i
);
122 LP_COUNT(nr_partially_covered_4
);
124 for (j
= 0; j
< NR_PLANES
; j
++)
127 + plane
[j
].dcdy
* iy
);
129 TAG(do_block_4
)(task
, tri
, plane
, px
, py
, cx
);
132 /* Iterate over fulls:
135 int i
= ffs(inmask
) - 1;
136 int ix
= (i
& 3) * 4;
137 int iy
= (i
>> 2) * 4;
143 LP_COUNT(nr_fully_covered_4
);
144 block_full_4(task
, tri
, px
, py
);
150 * Scan the tile in chunks and figure out which pixels to rasterize
154 TAG(lp_rast_triangle
)(struct lp_rasterizer_task
*task
,
155 const union lp_rast_cmd_arg arg
)
157 const struct lp_rast_triangle
*tri
= arg
.triangle
.tri
;
158 unsigned plane_mask
= arg
.triangle
.plane_mask
;
159 const int x
= task
->x
, y
= task
->y
;
160 struct lp_rast_plane plane
[NR_PLANES
];
162 unsigned outmask
, inmask
, partmask
, partial_mask
;
165 if (tri
->inputs
.disable
) {
166 /* This triangle was partially binned and has been disabled */
170 outmask
= 0; /* outside one or more trivial reject planes */
171 partmask
= 0; /* outside one or more trivial accept planes */
174 int i
= ffs(plane_mask
) - 1;
175 plane
[j
] = tri
->plane
[i
];
176 plane_mask
&= ~(1 << i
);
177 c
[j
] = plane
[j
].c
+ plane
[j
].dcdy
* y
- plane
[j
].dcdx
* x
;
180 const int dcdx
= -plane
[j
].dcdx
* 16;
181 const int dcdy
= plane
[j
].dcdy
* 16;
182 const int cox
= plane
[j
].eo
* 16;
183 const int cio
= plane
[j
].ei
* 16 - 1;
185 build_masks(c
[j
] + cox
,
188 &outmask
, /* sign bits from c[i][0..15] + cox */
189 &partmask
); /* sign bits from c[i][0..15] + cio */
195 if (outmask
== 0xffff)
198 /* Mask of sub-blocks which are inside all trivial accept planes:
200 inmask
= ~partmask
& 0xffff;
202 /* Mask of sub-blocks which are inside all trivial reject planes,
203 * but outside at least one trivial accept plane:
205 partial_mask
= partmask
& ~outmask
;
207 assert((partial_mask
& inmask
) == 0);
209 LP_COUNT_ADD(nr_empty_16
, util_bitcount(0xffff & ~(partial_mask
| inmask
)));
211 /* Iterate over partials:
213 while (partial_mask
) {
214 int i
= ffs(partial_mask
) - 1;
215 int ix
= (i
& 3) * 16;
216 int iy
= (i
>> 2) * 16;
221 for (j
= 0; j
< NR_PLANES
; j
++)
224 + plane
[j
].dcdy
* iy
);
226 partial_mask
&= ~(1 << i
);
228 LP_COUNT(nr_partially_covered_16
);
229 TAG(do_block_16
)(task
, tri
, plane
, px
, py
, cx
);
232 /* Iterate over fulls:
235 int i
= ffs(inmask
) - 1;
236 int ix
= (i
& 3) * 16;
237 int iy
= (i
>> 2) * 16;
243 LP_COUNT(nr_fully_covered_16
);
244 block_full_16(task
, tri
, px
, py
);