llvmpipe: remove some old sampler support structs
[mesa.git] / src / gallium / drivers / llvmpipe / lp_quad.h
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
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12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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27
28 /* Authors: Keith Whitwell <keith@tungstengraphics.com>
29 */
30
31 #ifndef LP_QUAD_H
32 #define LP_QUAD_H
33
34 #include "pipe/p_state.h"
35 #include "tgsi/tgsi_exec.h"
36
37
38 #define QUAD_PRIM_POINT 1
39 #define QUAD_PRIM_LINE 2
40 #define QUAD_PRIM_TRI 3
41
42
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.
46 */
47 #define QUAD_TOP_LEFT 0
48 #define QUAD_TOP_RIGHT 1
49 #define QUAD_BOTTOM_LEFT 2
50 #define QUAD_BOTTOM_RIGHT 3
51
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)
56 #define MASK_ALL 0xf
57
58
59 /**
60 * Quad stage inputs (pos, coverage, front/back face, etc)
61 */
62 struct quad_header_input
63 {
64 int x0, y0; /**< quad window pos, always even */
65 float coverage[QUAD_SIZE]; /**< fragment coverage for antialiasing */
66 unsigned facing:1; /**< Front (0) or back (1) facing? */
67 unsigned prim:2; /**< QUAD_PRIM_POINT, LINE, TRI */
68 };
69
70
71 /**
72 * Quad stage inputs/outputs.
73 */
74 struct quad_header_inout
75 {
76 unsigned mask:4;
77 };
78
79
80 /**
81 * Quad stage outputs (color & depth).
82 */
83 struct quad_header_output
84 {
85 /** colors in SOA format (rrrr, gggg, bbbb, aaaa) */
86 float ALIGN16_ATTRIB color[PIPE_MAX_COLOR_BUFS][NUM_CHANNELS][QUAD_SIZE];
87 };
88
89
90 /**
91 * Input interpolation coefficients
92 */
93 struct quad_interp_coef
94 {
95 float ALIGN16_ATTRIB a0[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
96 float ALIGN16_ATTRIB dadx[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
97 float ALIGN16_ATTRIB dady[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
98 };
99
100
101 /**
102 * Encodes everything we need to know about a 2x2 pixel block. Uses
103 * "Channel-Serial" or "SoA" layout.
104 */
105 struct quad_header {
106 struct quad_header_input input;
107 struct quad_header_inout inout;
108
109 /* Redundant/duplicated:
110 */
111 const struct quad_interp_coef *coef;
112 };
113
114 #endif /* LP_QUAD_H */