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1COPYRIGHT = """\
2/*
3 * Copyright 2017 Google
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25"""
26
27# stdlib
28import argparse
29from sys import stdout
30from mako.template import Template
31
32# local
33import format_parser
34
35def parse_args():
36    p = argparse.ArgumentParser()
37    p.add_argument("csv")
38    p.add_argument("out")
39    return p.parse_args()
40
41def get_unorm_to_srgb_map(formats):
42    names = set(fmt.name for fmt in formats)
43
44    for fmt in formats:
45        if fmt.colorspace != 'srgb':
46            continue;
47
48        replacements = [
49            ('SRGB', 'RGB'),
50            ('SRGB', 'UNORM'),
51            ('SRGB8_ALPHA8', 'RGBA'),
52            ('SRGB8_ALPHA8', 'RGBA8'),
53            ('SRGB_ALPHA_UNORM', 'RGBA_UNORM'),
54        ]
55        found_unorm_name = False
56        for rep in replacements:
57            if fmt.name.find(rep[0]) == -1:
58                continue
59
60            unorm_name = fmt.name.replace(rep[0], rep[1])
61            if unorm_name in names:
62                yield unorm_name, fmt.name
63                found_unorm_name = True
64                break
65
66        # Every sRGB format MUST have a UNORM equivalent
67        assert found_unorm_name
68
69def get_intensity_to_red_map(formats):
70    names = set(fmt.name for fmt in formats)
71
72    for fmt in formats:
73        if str(fmt.swizzle) != 'xxxx':
74            continue
75
76        i_name = fmt.name
77        r_name = i_name.replace("_I_", "_R_")
78
79        assert r_name in names
80
81        yield i_name, r_name
82
83TEMPLATE = Template(COPYRIGHT + """
84#include "formats.h"
85#include "util/macros.h"
86
87/**
88 * For an sRGB format, return the corresponding linear color space format.
89 * For non-sRGB formats, return the format as-is.
90 */
91mesa_format
92_mesa_get_srgb_format_linear(mesa_format format)
93{
94   switch (format) {
95%for unorm, srgb in unorm_to_srgb_map:
96   case ${srgb}:
97      return ${unorm};
98%endfor
99   default:
100      return format;
101   }
102}
103
104/**
105 * For an intensity format, return the corresponding red format.  For other
106 * formats, return the format as-is.
107 */
108mesa_format
109_mesa_get_intensity_format_red(mesa_format format)
110{
111   switch (format) {
112%for i, r in intensity_to_red_map:
113   case ${i}:
114      return ${r};
115%endfor
116   default:
117      return format;
118   }
119}
120""");
121
122def main():
123    pargs = parse_args()
124
125    formats = list(format_parser.parse(pargs.csv))
126
127    template_env = {
128        'unorm_to_srgb_map': list(get_unorm_to_srgb_map(formats)),
129        'intensity_to_red_map': list(get_intensity_to_red_map(formats)),
130    }
131
132    with open(pargs.out, 'w') as f:
133        f.write(TEMPLATE.render(**template_env))
134
135if __name__ == "__main__":
136    main()
137