1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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 **************************************************************************/
28 /* Authors: Keith Whitwell <keithw@vmware.com>
34 #include "pipe/p_state.h"
35 #include "tgsi/tgsi_exec.h"
38 #define QUAD_PRIM_POINT 1
39 #define QUAD_PRIM_LINE 2
40 #define QUAD_PRIM_TRI 3
43 /* The rasterizer generates 2x2 quads of fragment and feeds them to
44 * the current fp_machine (see below).
45 * Remember that Y=0=top with Y increasing down the window.
47 #define QUAD_TOP_LEFT 0
48 #define QUAD_TOP_RIGHT 1
49 #define QUAD_BOTTOM_LEFT 2
50 #define QUAD_BOTTOM_RIGHT 3
52 #define MASK_TOP_LEFT (1 << QUAD_TOP_LEFT)
53 #define MASK_TOP_RIGHT (1 << QUAD_TOP_RIGHT)
54 #define MASK_BOTTOM_LEFT (1 << QUAD_BOTTOM_LEFT)
55 #define MASK_BOTTOM_RIGHT (1 << QUAD_BOTTOM_RIGHT)
60 * Quad stage inputs (pos, coverage, front/back face, etc)
62 struct quad_header_input
64 int x0
, y0
; /**< quad window pos, always even */
66 unsigned viewport_index
;
67 float coverage
[TGSI_QUAD_SIZE
]; /**< fragment coverage for antialiasing */
68 unsigned facing
:1; /**< Front (0) or back (1) facing? */
69 unsigned prim
:2; /**< QUAD_PRIM_POINT, LINE, TRI */
74 * Quad stage inputs/outputs.
76 struct quad_header_inout
83 * Quad stage outputs (color & depth).
85 struct quad_header_output
87 /** colors in SOA format (rrrr, gggg, bbbb, aaaa) */
88 float color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][TGSI_QUAD_SIZE
];
89 float depth
[TGSI_QUAD_SIZE
];
90 uint8_t stencil
[TGSI_QUAD_SIZE
];
95 * Encodes everything we need to know about a 2x2 pixel block. Uses
96 * "Channel-Serial" or "SoA" layout.
99 struct quad_header_input input
;
100 struct quad_header_inout inout
;
101 struct quad_header_output output
;
103 /* Redundant/duplicated:
105 const struct tgsi_interp_coef
*posCoef
;
106 const struct tgsi_interp_coef
*coef
;
109 #endif /* SP_QUAD_H */