src/mapi/glapi/gen/gl_procs.py

   1
   2 # (C) Copyright IBM Corporation 2004, 2005
   3 # All Rights Reserved.
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a
   6 # copy of this software and associated documentation files (the "Software"),
   7 # to deal in the Software without restriction, including without limitation
   8 # on the rights to use, copy, modify, merge, publish, distribute, sub
   9 # license, and/or sell copies of the Software, and to permit persons to whom
  10 # the Software is furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice (including the next
  13 # paragraph) shall be included in all copies or substantial portions of the
  14 # Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22 # IN THE SOFTWARE.
  23 #
  24 # Authors:
  25 #    Ian Romanick <idr@us.ibm.com>
  26
  27 from __future__ import print_function
  28
  29 import argparse
  30
  31 import license
  32 import gl_XML
  33 import glX_XML
  34
  35
  36 class PrintGlProcs(gl_XML.gl_print_base):
  37     def __init__(self, es=False):
  38         gl_XML.gl_print_base.__init__(self)
  39
  40         self.es = es
  41         self.name = "gl_procs.py (from Mesa)"
  42         self.license = license.bsd_license_template % ( \
  43 """Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
  44 (C) Copyright IBM Corporation 2004, 2006""", "BRIAN PAUL, IBM")
  45
  46     def printRealHeader(self):
  47         print("""
  48 /* This file is only included by glapi.c and is used for
  49  * the GetProcAddress() function
  50  */
  51
  52 typedef struct {
  53     GLint Name_offset;
  54 #if defined(NEED_FUNCTION_POINTER) || defined(GLX_INDIRECT_RENDERING)
  55     _glapi_proc Address;
  56 #endif
  57     GLuint Offset;
  58 } glprocs_table_t;
  59
  60 #if   !defined(NEED_FUNCTION_POINTER) && !defined(GLX_INDIRECT_RENDERING)
  61 #  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , o }
  62 #elif  defined(NEED_FUNCTION_POINTER) && !defined(GLX_INDIRECT_RENDERING)
  63 #  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , (_glapi_proc) f1 , o }
  64 #elif  defined(NEED_FUNCTION_POINTER) &&  defined(GLX_INDIRECT_RENDERING)
  65 #  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , (_glapi_proc) f2 , o }
  66 #elif !defined(NEED_FUNCTION_POINTER) &&  defined(GLX_INDIRECT_RENDERING)
  67 #  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , (_glapi_proc) f3 , o }
  68 #endif
  69
  70 """)
  71         return
  72
  73     def printRealFooter(self):
  74         print('')
  75         print('#undef NAME_FUNC_OFFSET')
  76         return
  77
  78     def printFunctionString(self, name):
  79         print('    "gl%s\\0"' % (name))
  80
  81     def printBody(self, api):
  82         print('')
  83         print('static const char gl_string_table[] =')
  84
  85         base_offset = 0
  86         table = []
  87         for func in api.functionIterateByOffset():
  88             name = func.dispatch_name()
  89             self.printFunctionString(func.name)
  90             table.append((base_offset, "gl" + name, "gl" + name, "NULL", func.offset))
  91
  92             # The length of the function's name, plus 2 for "gl",
  93             # plus 1 for the NUL.
  94
  95             base_offset += len(func.name) + 3
  96
  97
  98         for func in api.functionIterateByOffset():
  99             for n in func.entry_points:
 100                 if n != func.name:
 101                     name = func.dispatch_name()
 102                     self.printFunctionString( n )
 103
 104                     if func.has_different_protocol(n):
 105                         alt_name = "gl" + func.static_glx_name(n)
 106                         table.append((base_offset, "gl" + name, alt_name, alt_name, func.offset))
 107                     else:
 108                         table.append((base_offset, "gl" + name, "gl" + name, "NULL", func.offset))
 109
 110                     base_offset += len(n) + 3
 111
 112
 113         print('    ;')
 114         print('')
 115         print('')
 116         print('#if defined(NEED_FUNCTION_POINTER) || defined(GLX_INDIRECT_RENDERING)')
 117         for func in api.functionIterateByOffset():
 118             for n in func.entry_points:
 119                 if (not func.is_static_entry_point(func.name)) or (func.has_different_protocol(n) and not func.is_static_entry_point(n)):
 120                     print('%s GLAPIENTRY gl_dispatch_stub_%u(%s);' % (func.return_type, func.offset, func.get_parameter_string()))
 121                     break
 122
 123         if self.es:
 124             categories = {}
 125             for func in api.functionIterateByOffset():
 126                 for n in func.entry_points:
 127                     cat, num = api.get_category_for_name(n)
 128                     if (cat.startswith("es") or cat.startswith("GL_OES")):
 129                         if cat not in categories:
 130                             categories[cat] = []
 131                         proto = 'GLAPI %s GLAPIENTRY %s(%s);' \
 132                                         % (func.return_type, "gl" + n, func.get_parameter_string(n))
 133                         categories[cat].append(proto)
 134             if categories:
 135                 print('')
 136                 print('/* OpenGL ES specific prototypes */')
 137                 print('')
 138                 keys = sorted(categories.keys())
 139                 for key in keys:
 140                     print('/* category %s */' % key)
 141                     print("\n".join(categories[key]))
 142                 print('')
 143
 144         print('#endif /* defined(NEED_FUNCTION_POINTER) || defined(GLX_INDIRECT_RENDERING) */')
 145
 146         print('')
 147         print('static const glprocs_table_t static_functions[] = {')
 148
 149         for info in table:
 150             print('    NAME_FUNC_OFFSET(%5u, %s, %s, %s, %d),' % info)
 151
 152         print('    NAME_FUNC_OFFSET(-1, NULL, NULL, NULL, 0)')
 153         print('};')
 154         return
 155
 156
 157 def _parser():
 158     """Parse arguments and return a namepsace."""
 159
 160     parser = argparse.ArgumentParser()
 161     parser.add_argument('-f', '--filename',
 162                         default='gl_API.xml',
 163                         metavar="input_file_name",
 164                         dest='file_name',
 165                         help="Path to an XML description of OpenGL API.")
 166     parser.add_argument('-c', '--es-version',
 167                         dest='es',
 168                         action="store_true",
 169                         help="filter functions for es")
 170     return parser.parse_args()
 171
 172
 173 def main():
 174     """Main function."""
 175     args = _parser()
 176     api = gl_XML.parse_GL_API(args.file_name, glX_XML.glx_item_factory())
 177     PrintGlProcs(args.es).Print(api)
 178
 179
 180 if __name__ == '__main__':
 181     main()