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1#!/usr/bin/python3
2# Copyright 2016 The ANGLE Project Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5#
6# gen_copy_conversion_table.py:
7#  Code generation for ES3 valid copy conversions table format map.
8#  NOTE: don't run this script directly. Run scripts/run_code_generation.py.
9
10import sys
11
12sys.path.append('renderer')
13import angle_format
14
15template_cpp = """// GENERATED FILE - DO NOT EDIT.
16// Generated by {script_name} using data from {data_source_name}.
17//
18// Copyright 2016 The ANGLE Project Authors. All rights reserved.
19// Use of this source code is governed by a BSD-style license that can be
20// found in the LICENSE file.
21//
22// format_map:
23//   Determining the sized internal format from a (format,type) pair.
24//   Also check es3 format combinations for validity.
25
26#include "angle_gl.h"
27#include "common/debug.h"
28
29namespace gl
30{{
31
32bool ValidES3CopyConversion(GLenum textureFormat, GLenum framebufferFormat)
33{{
34    switch (textureFormat)
35    {{
36{texture_format_cases}        default:
37            break;
38    }}
39
40    return false;
41}}
42
43}}  // namespace gl
44"""
45
46template_format_case = """        case {texture_format}:
47            switch (framebufferFormat)
48            {{
49{framebuffer_format_cases}                    return true;
50                default:
51                    break;
52            }}
53            break;
54
55"""
56
57template_simple_case = """                case {key}:
58"""
59
60
61def parse_texture_format_case(texture_format, framebuffer_formats):
62    framebuffer_format_cases = ""
63    for framebuffer_format in sorted(framebuffer_formats):
64        framebuffer_format_cases += template_simple_case.format(key=framebuffer_format)
65    return template_format_case.format(
66        texture_format=texture_format, framebuffer_format_cases=framebuffer_format_cases)
67
68
69def main():
70
71    data_source_name = 'es3_copy_conversion_formats.json'
72    out_file_name = 'es3_copy_conversion_table_autogen.cpp'
73
74    # auto_script parameters.
75    if len(sys.argv) > 1:
76        inputs = ['renderer/angle_format.py', data_source_name]
77        outputs = [out_file_name]
78
79        if sys.argv[1] == 'inputs':
80            print(','.join(inputs))
81        elif sys.argv[1] == 'outputs':
82            print(','.join(outputs))
83        else:
84            print('Invalid script parameters')
85            return 1
86        return 0
87
88    json_data = angle_format.load_json(data_source_name)
89
90    format_map = {}
91
92    for description, data in sorted(json_data.items()):
93        for texture_format, framebuffer_format in data:
94            if texture_format not in format_map:
95                format_map[texture_format] = []
96            format_map[texture_format] += [framebuffer_format]
97
98    texture_format_cases = ""
99
100    for texture_format, framebuffer_formats in sorted(format_map.items()):
101        texture_format_cases += parse_texture_format_case(texture_format, framebuffer_formats)
102
103    with open(out_file_name, 'wt') as out_file:
104        output_cpp = template_cpp.format(
105            script_name=sys.argv[0],
106            data_source_name=data_source_name,
107            texture_format_cases=texture_format_cases)
108        out_file.write(output_cpp)
109        out_file.close()
110    return 0
111
112
113if __name__ == '__main__':
114    sys.exit(main())
115