1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 * Copyright 2010 VMware, Inc. All rights reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29 #ifndef SP_TEX_SAMPLE_H
30 #define SP_TEX_SAMPLE_H
31
32
33 #include "tgsi/tgsi_exec.h"
34
35 struct sp_sampler_variant;
36
37 typedef void (*wrap_nearest_func)(float s,
38 unsigned size,
39 int *icoord);
40
41 typedef void (*wrap_linear_func)(float s,
42 unsigned size,
43 int *icoord0,
44 int *icoord1,
45 float *w);
46
47 typedef float (*compute_lambda_func)(const struct sp_sampler_variant *sampler,
48 const float s[TGSI_QUAD_SIZE],
49 const float t[TGSI_QUAD_SIZE],
50 const float p[TGSI_QUAD_SIZE]);
51
52 typedef void (*img_filter_func)(struct tgsi_sampler *tgsi_sampler,
53 float s,
54 float t,
55 float p,
56 unsigned level,
57 unsigned face_id,
58 enum tgsi_sampler_control control,
59 float *rgba);
60
61 typedef void (*filter_func)(struct tgsi_sampler *tgsi_sampler,
62 const float s[TGSI_QUAD_SIZE],
63 const float t[TGSI_QUAD_SIZE],
64 const float p[TGSI_QUAD_SIZE],
65 const float c0[TGSI_QUAD_SIZE],
66 enum tgsi_sampler_control control,
67 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
68
69
70 union sp_sampler_key {
71 struct {
72 unsigned target:3;
73 unsigned is_pot:1;
74 unsigned processor:2;
75 unsigned unit:4;
76 unsigned swizzle_r:3;
77 unsigned swizzle_g:3;
78 unsigned swizzle_b:3;
79 unsigned swizzle_a:3;
80 unsigned pad:10;
81 } bits;
82 unsigned value;
83 };
84
85 /**
86 * Subclass of tgsi_sampler
87 */
88 struct sp_sampler_variant
89 {
90 struct tgsi_sampler base; /**< base class */
91
92 union sp_sampler_key key;
93
94 /* The owner of this struct:
95 */
96 const struct pipe_sampler_state *sampler;
97
98
99 /* Currently bound texture:
100 */
101 const struct pipe_sampler_view *view;
102 struct softpipe_tex_tile_cache *cache;
103
104 unsigned processor;
105
106 /* For sp_get_samples_2d_linear_POT:
107 */
108 unsigned xpot;
109 unsigned ypot;
110
111 unsigned faces[TGSI_QUAD_SIZE];
112
113 wrap_nearest_func nearest_texcoord_s;
114 wrap_nearest_func nearest_texcoord_t;
115 wrap_nearest_func nearest_texcoord_p;
116
117 wrap_linear_func linear_texcoord_s;
118 wrap_linear_func linear_texcoord_t;
119 wrap_linear_func linear_texcoord_p;
120
121 img_filter_func min_img_filter;
122 img_filter_func mag_img_filter;
123
124 compute_lambda_func compute_lambda;
125
126 filter_func mip_filter;
127 filter_func compare;
128 filter_func sample_target;
129
130 /* Linked list:
131 */
132 struct sp_sampler_variant *next;
133 };
134
135 struct sp_sampler;
136
137 /* Create a sampler variant for a given set of non-orthogonal state. Currently the
138 */
139 struct sp_sampler_variant *
140 sp_create_sampler_variant( const struct pipe_sampler_state *sampler,
141 const union sp_sampler_key key );
142
143 void sp_sampler_variant_bind_view( struct sp_sampler_variant *variant,
144 struct softpipe_tex_tile_cache *tex_cache,
145 const struct pipe_sampler_view *view );
146
147 void sp_sampler_variant_destroy( struct sp_sampler_variant * );
148
149
150
151 static INLINE struct sp_sampler_variant *
sp_sampler_variant(const struct tgsi_sampler * sampler)152 sp_sampler_variant(const struct tgsi_sampler *sampler)
153 {
154 return (struct sp_sampler_variant *) sampler;
155 }
156
157 extern void
158 sp_get_samples(struct tgsi_sampler *tgsi_sampler,
159 const float s[TGSI_QUAD_SIZE],
160 const float t[TGSI_QUAD_SIZE],
161 const float p[TGSI_QUAD_SIZE],
162 float lodbias,
163 float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
164
165
166 #endif /* SP_TEX_SAMPLE_H */
167