src/mesa/glapi/gen/gl_enums.py

   1 #!/usr/bin/python2
   2 # -*- Mode: Python; py-indent-offset: 8 -*-
   3
   4 # (C) Copyright Zack Rusin 2005
   5 # All Rights Reserved.
   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 # Authors:
  27 #    Zack Rusin <zack@kde.org>
  28
  29 import license
  30 import gl_XML
  31 import sys, getopt
  32
  33 class PrintGlEnums(gl_XML.gl_print_base):
  34
  35         def __init__(self):
  36                 gl_XML.gl_print_base.__init__(self)
  37
  38                 self.name = "gl_enums.py (from Mesa)"
  39                 self.license = license.bsd_license_template % ( \
  40 """Copyright (C) 1999-2005 Brian Paul All Rights Reserved.""", "BRIAN PAUL")
  41                 self.enum_table = {}
  42
  43
  44         def printRealHeader(self):
  45                 print '#include "main/glheader.h"'
  46                 print '#include "main/mfeatures.h"'
  47                 print '#include "main/enums.h"'
  48                 print '#include "main/imports.h"'
  49                 print ''
  50                 print 'typedef struct {'
  51                 print '   size_t offset;'
  52                 print '   int n;'
  53                 print '} enum_elt;'
  54                 print ''
  55                 return
  56
  57         def print_code(self):
  58                 print """
  59 typedef int (*cfunc)(const void *, const void *);
  60
  61 /**
  62  * Compare a key name to an element in the \c all_enums array.
  63  *
  64  * \c bsearch always passes the key as the first parameter and the pointer
  65  * to the array element as the second parameter.  We can elimiate some
  66  * extra work by taking advantage of that fact.
  67  *
  68  * \param a  Pointer to the desired enum name.
  69  * \param b  Pointer to an element of the \c all_enums array.
  70  */
  71 static int compar_name( const char *a, const enum_elt *b )
  72 {
  73    return strcmp( a, & enum_string_table[ b->offset ] );
  74 }
  75
  76 /**
  77  * Compare a key enum value to an element in the \c all_enums array.
  78  *
  79  * \c bsearch always passes the key as the first parameter and the pointer
  80  * to the array element as the second parameter.  We can elimiate some
  81  * extra work by taking advantage of that fact.
  82  *
  83  * \param a  Pointer to the desired enum name.
  84  * \param b  Pointer to an index into the \c all_enums array.
  85  */
  86 static int compar_nr( const int *a, const unsigned *b )
  87 {
  88    return a[0] - all_enums[*b].n;
  89 }
  90
  91
  92 static char token_tmp[20];
  93
  94 const char *_mesa_lookup_enum_by_nr( int nr )
  95 {
  96    unsigned * i;
  97
  98    i = (unsigned *) _mesa_bsearch(& nr, reduced_enums,
  99                                   Elements(reduced_enums),
 100                                   sizeof(reduced_enums[0]),
 101                                   (cfunc) compar_nr);
 102
 103    if ( i != NULL ) {
 104       return & enum_string_table[ all_enums[ *i ].offset ];
 105    }
 106    else {
 107       /* this is not re-entrant safe, no big deal here */
 108       sprintf(token_tmp, "0x%x", nr);
 109       return token_tmp;
 110    }
 111 }
 112
 113 /* Get the name of an enum given that it is a primitive type.  Avoids
 114  * GL_FALSE/GL_POINTS ambiguity and others.
 115  */
 116 const char *_mesa_lookup_prim_by_nr( int nr )
 117 {
 118    switch (nr) {
 119    case GL_POINTS: return "GL_POINTS";
 120    case GL_LINES: return "GL_LINES";
 121    case GL_LINE_STRIP: return "GL_LINE_STRIP";
 122    case GL_LINE_LOOP: return "GL_LINE_LOOP";
 123    case GL_TRIANGLES: return "GL_TRIANGLES";
 124    case GL_TRIANGLE_STRIP: return "GL_TRIANGLE_STRIP";
 125    case GL_TRIANGLE_FAN: return "GL_TRIANGLE_FAN";
 126    case GL_QUADS: return "GL_QUADS";
 127    case GL_QUAD_STRIP: return "GL_QUAD_STRIP";
 128    case GL_POLYGON: return "GL_POLYGON";
 129    case GL_POLYGON+1: return "OUTSIDE_BEGIN_END";
 130    default: return "<invalid>";
 131    }
 132 }
 133
 134
 135
 136 int _mesa_lookup_enum_by_name( const char *symbol )
 137 {
 138    enum_elt * f = NULL;
 139
 140    if ( symbol != NULL ) {
 141       f = (enum_elt *) _mesa_bsearch(symbol, all_enums,
 142                                      Elements(all_enums),
 143                                      sizeof( enum_elt ),
 144                                      (cfunc) compar_name);
 145    }
 146
 147    return (f != NULL) ? f->n : -1;
 148 }
 149
 150 """
 151                 return
 152
 153
 154         def printBody(self, api_list):
 155                 self.enum_table = {}
 156                 for api in api_list:
 157                         self.process_enums( api )
 158
 159                 keys = self.enum_table.keys()
 160                 keys.sort()
 161
 162                 name_table = []
 163                 enum_table = {}
 164
 165                 for enum in keys:
 166                         low_pri = 9
 167                         for [name, pri] in self.enum_table[ enum ]:
 168                                 name_table.append( [name, enum] )
 169
 170                                 if pri < low_pri:
 171                                         low_pri = pri
 172                                         enum_table[enum] = name
 173
 174
 175                 name_table.sort()
 176
 177                 string_offsets = {}
 178                 i = 0;
 179                 print 'LONGSTRING static const char enum_string_table[] = '
 180                 for [name, enum] in name_table:
 181                         print '   "%s\\0"' % (name)
 182                         string_offsets[ name ] = i
 183                         i += len(name) + 1
 184
 185                 print '   ;'
 186                 print ''
 187
 188
 189                 print 'static const enum_elt all_enums[%u] =' % (len(name_table))
 190                 print '{'
 191                 for [name, enum] in name_table:
 192                         print '   { %5u, 0x%08X }, /* %s */' % (string_offsets[name], enum, name)
 193                 print '};'
 194                 print ''
 195
 196                 print 'static const unsigned reduced_enums[%u] =' % (len(keys))
 197                 print '{'
 198                 for enum in keys:
 199                         name = enum_table[ enum ]
 200                         if [name, enum] not in name_table:
 201                                 print '      /* Error! %s, 0x%04x */ 0,' % (name, enum)
 202                         else:
 203                                 i = name_table.index( [name, enum] )
 204
 205                                 print '      %4u, /* %s */' % (i, name)
 206                 print '};'
 207
 208
 209                 self.print_code()
 210                 return
 211
 212
 213         def process_enums(self, api):
 214                 for obj in api.enumIterateByName():
 215                         if obj.value not in self.enum_table:
 216                                 self.enum_table[ obj.value ] = []
 217
 218
 219                         enum = self.enum_table[ obj.value ]
 220                         name = "GL_" + obj.name
 221                         priority = obj.priority()
 222                         already_in = False;
 223                         for n, p in enum:
 224                                 if n == name:
 225                                         already_in = True
 226                         if not already_in:
 227                                 enum.append( [name, priority] )
 228
 229
 230 def show_usage():
 231         print "Usage: %s [-f input_file_name]" % sys.argv[0]
 232         sys.exit(1)
 233
 234 if __name__ == '__main__':
 235         try:
 236                 (args, trail) = getopt.getopt(sys.argv[1:], "f:")
 237         except Exception,e:
 238                 show_usage()
 239
 240         api_list = []
 241         for (arg,val) in args:
 242                 if arg == "-f":
 243                         api = gl_XML.parse_GL_API( val )
 244                         api_list.append(api);
 245
 246         printer = PrintGlEnums()
 247         printer.Print( api_list )