src/mapi/glapi/gen/remap_helper.py

   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
  27 import argparse
  28
  29 import license
  30 import gl_XML
  31
  32
  33 def 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
  60 class 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
 127 def _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
 138 def 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
 148 if __name__ == '__main__':
 149     main()