• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1#!/usr/bin/env python
2
3# Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
4# All Rights Reserved.
5#
6# This is based on extension_helper.py by Ian Romanick.
7#
8# Permission is hereby granted, free of charge, to any person obtaining a
9# copy of this software and associated documentation files (the "Software"),
10# to deal in the Software without restriction, including without limitation
11# on the rights to use, copy, modify, merge, publish, distribute, sub
12# license, and/or sell copies of the Software, and to permit persons to whom
13# the Software is furnished to do so, subject to the following conditions:
14#
15# The above copyright notice and this permission notice (including the next
16# paragraph) shall be included in all copies or substantial portions of the
17# Software.
18#
19# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
22# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25# IN THE SOFTWARE.
26
27import argparse
28
29import license
30import gl_XML
31
32
33def get_function_spec(func):
34    sig = ""
35    # derive parameter signature
36    for p in func.parameterIterator():
37        if p.is_padding:
38            continue
39        # FIXME: This is a *really* ugly hack. :(
40        tn = p.type_expr.get_base_type_node()
41        if p.is_pointer():
42            sig += 'p'
43        elif tn.integer:
44            sig += 'i'
45        elif tn.size == 4:
46            sig += 'f'
47        else:
48            sig += 'd'
49
50    spec = [sig]
51    for ent in func.entry_points:
52        spec.append("gl" + ent)
53
54    # spec is terminated by an empty string
55    spec.append('')
56
57    return spec
58
59
60class PrintGlRemap(gl_XML.gl_print_base):
61    def __init__(self):
62        gl_XML.gl_print_base.__init__(self)
63
64        self.name = "remap_helper.py (from Mesa)"
65        self.license = license.bsd_license_template % ("Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>", "Chia-I Wu")
66        return
67
68
69    def printRealHeader(self):
70        print '#include "main/dispatch.h"'
71        print '#include "main/remap.h"'
72        print ''
73        return
74
75
76    def printBody(self, api):
77        pool_indices = {}
78
79        print '/* this is internal to remap.c */'
80        print '#ifndef need_MESA_remap_table'
81        print '#error Only remap.c should include this file!'
82        print '#endif /* need_MESA_remap_table */'
83        print ''
84
85        print ''
86        print 'static const char _mesa_function_pool[] ='
87
88        # output string pool
89        index = 0;
90        for f in api.functionIterateAll():
91            pool_indices[f] = index
92
93            spec = get_function_spec(f)
94
95            # a function has either assigned offset, fixed offset,
96            # or no offset
97            if f.assign_offset:
98                comments = "will be remapped"
99            elif f.offset > 0:
100                comments = "offset %d" % f.offset
101            else:
102                comments = "dynamic"
103
104            print '   /* _mesa_function_pool[%d]: %s (%s) */' \
105                            % (index, f.name, comments)
106            for line in spec:
107                print '   "%s\\0"' % line
108                index += len(line) + 1
109        print '   ;'
110        print ''
111
112        print '/* these functions need to be remapped */'
113        print 'static const struct gl_function_pool_remap MESA_remap_table_functions[] = {'
114        # output all functions that need to be remapped
115        # iterate by offsets so that they are sorted by remap indices
116        for f in api.functionIterateByOffset():
117            if not f.assign_offset:
118                continue
119            print '   { %5d, %s_remap_index },' \
120                            % (pool_indices[f], f.name)
121        print '   {    -1, -1 }'
122        print '};'
123        print ''
124        return
125
126
127def _parser():
128    """Parse input options and return a namsepace."""
129    parser = argparse.ArgumentParser()
130    parser.add_argument('-f', '--filename',
131                        default="gl_API.xml",
132                        metavar="input_file_name",
133                        dest='file_name',
134                        help="An xml description file.")
135    return parser.parse_args()
136
137
138def main():
139    """Main function."""
140    args = _parser()
141
142    api = gl_XML.parse_GL_API(args.file_name)
143
144    printer = PrintGlRemap()
145    printer.Print(api)
146
147
148if __name__ == '__main__':
149    main()
150