src/mapi/glapi/gen/remap_helper.py

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