1/*
2 * Copyright 2009 Marek Olšák <maraeo@gmail.com>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
22
23#ifndef R300_SHADER_SEMANTICS_H
24#define R300_SHADER_SEMANTICS_H
25
26#define ATTR_UNUSED             (-1)
27#define ATTR_COLOR_COUNT        2
28#define ATTR_GENERIC_COUNT      32
29
30/* This structure contains information about what attributes are written by VS
31 * or read by FS. (but not both) It's much easier to work with than
32 * tgsi_shader_info.
33 *
34 * The variables contain indices to tgsi_shader_info semantics and those
35 * indices are nothing else than input/output register numbers. */
36struct r300_shader_semantics {
37    int pos;
38    int psize;
39    int color[ATTR_COLOR_COUNT];
40    int bcolor[ATTR_COLOR_COUNT];
41    int face;
42    int generic[ATTR_GENERIC_COUNT];
43    int fog;
44    int wpos;
45
46    int num_generic;
47};
48
49static inline void r300_shader_semantics_reset(
50    struct r300_shader_semantics* info)
51{
52    int i;
53
54    info->pos = ATTR_UNUSED;
55    info->psize = ATTR_UNUSED;
56    info->face = ATTR_UNUSED;
57    info->fog = ATTR_UNUSED;
58    info->wpos = ATTR_UNUSED;
59
60    for (i = 0; i < ATTR_COLOR_COUNT; i++) {
61        info->color[i] = ATTR_UNUSED;
62        info->bcolor[i] = ATTR_UNUSED;
63    }
64
65    for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
66        info->generic[i] = ATTR_UNUSED;
67    }
68
69    info->num_generic = 0;
70}
71
72#endif
73