src/mapi/glapi/gen/gl_table.py

   1
   2 # (C) Copyright IBM Corporation 2004
   3 # All Rights Reserved.
   4 # Copyright (c) 2014 Intel Corporation
   5 #
   6 # Permission is hereby granted, free of charge, to any person obtaining a
   7 # copy of this software and associated documentation files (the "Software"),
   8 # to deal in the Software without restriction, including without limitation
   9 # on the rights to use, copy, modify, merge, publish, distribute, sub
  10 # license, and/or sell copies of the Software, and to permit persons to whom
  11 # the Software is furnished to do so, subject to the following conditions:
  12 #
  13 # The above copyright notice and this permission notice (including the next
  14 # paragraph) shall be included in all copies or substantial portions of the
  15 # Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23 # IN THE SOFTWARE.
  24 #
  25 # Authors:
  26 #    Ian Romanick <idr@us.ibm.com>
  27
  28 from __future__ import print_function
  29
  30 import argparse
  31
  32 import gl_XML
  33 import license
  34
  35
  36 class PrintGlTable(gl_XML.gl_print_base):
  37     def __init__(self):
  38         gl_XML.gl_print_base.__init__(self)
  39
  40         self.header_tag = '_GLAPI_TABLE_H_'
  41         self.name = "gl_table.py (from Mesa)"
  42         self.license = license.bsd_license_template % ( \
  43 """Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
  44 (C) Copyright IBM Corporation 2004""", "BRIAN PAUL, IBM")
  45         return
  46
  47     def printBody(self, api):
  48         for f in api.functionIterateByOffset():
  49             arg_string = f.get_parameter_string()
  50             print('   %s (GLAPIENTRYP %s)(%s); /* %d */' % (
  51                 f.return_type, f.name, arg_string, f.offset))
  52
  53     def printRealHeader(self):
  54         print('#ifndef GLAPIENTRYP')
  55         print('# ifndef GLAPIENTRY')
  56         print('#  define GLAPIENTRY')
  57         print('# endif')
  58         print('')
  59         print('# define GLAPIENTRYP GLAPIENTRY *')
  60         print('#endif')
  61         print('')
  62         print('')
  63         print('#ifdef __cplusplus')
  64         print('extern "C" {')
  65         print('#endif')
  66         print('')
  67         print('struct _glapi_table')
  68         print('{')
  69         return
  70
  71     def printRealFooter(self):
  72         print('};')
  73         print('')
  74         print('#ifdef __cplusplus')
  75         print('}')
  76         print('#endif')
  77         return
  78
  79
  80 class PrintRemapTable(gl_XML.gl_print_base):
  81     def __init__(self):
  82         gl_XML.gl_print_base.__init__(self)
  83
  84         self.header_tag = '_DISPATCH_H_'
  85         self.name = "gl_table.py (from Mesa)"
  86         self.license = license.bsd_license_template % (
  87             "(C) Copyright IBM Corporation 2005", "IBM")
  88         return
  89
  90
  91     def printRealHeader(self):
  92         print("""
  93 /**
  94  * \\file main/dispatch.h
  95  * Macros for handling GL dispatch tables.
  96  *
  97  * For each known GL function, there are 3 macros in this file.  The first
  98  * macro is named CALL_FuncName and is used to call that GL function using
  99  * the specified dispatch table.  The other 2 macros, called GET_FuncName
 100  * can SET_FuncName, are used to get and set the dispatch pointer for the
 101  * named function in the specified dispatch table.
 102  */
 103 """)
 104         return
 105
 106
 107     def printBody(self, api):
 108         print('#define CALL_by_offset(disp, cast, offset, parameters) \\')
 109         print('    (*(cast (GET_by_offset(disp, offset)))) parameters')
 110         print('#define GET_by_offset(disp, offset) \\')
 111         print('    (offset >= 0) ? (((_glapi_proc *)(disp))[offset]) : NULL')
 112         print('#define SET_by_offset(disp, offset, fn) \\')
 113         print('    do { \\')
 114         print('        if ( (offset) < 0 ) { \\')
 115         print('            /* fprintf( stderr, "[%s:%u] SET_by_offset(%p, %d, %s)!\\n", */ \\')
 116         print('            /*         __func__, __LINE__, disp, offset, # fn); */ \\')
 117         print('            /* abort(); */ \\')
 118         print('        } \\')
 119         print('        else { \\')
 120         print('            ( (_glapi_proc *) (disp) )[offset] = (_glapi_proc) fn; \\')
 121         print('        } \\')
 122         print('    } while(0)')
 123         print('')
 124
 125         functions = []
 126         abi_functions = []
 127         count = 0
 128         for f in api.functionIterateByOffset():
 129             if not f.is_abi():
 130                 functions.append([f, count])
 131                 count += 1
 132             else:
 133                 abi_functions.append([f, -1])
 134
 135         print('/* total number of offsets below */')
 136         print('#define _gloffset_COUNT %d' % (len(abi_functions + functions)))
 137         print('')
 138
 139         for f, index in abi_functions:
 140             print('#define _gloffset_%s %d' % (f.name, f.offset))
 141
 142         remap_table = "driDispatchRemapTable"
 143
 144         print('#define %s_size %u' % (remap_table, count))
 145         print('extern int %s[ %s_size ];' % (remap_table, remap_table))
 146         print('')
 147
 148         for f, index in functions:
 149             print('#define %s_remap_index %u' % (f.name, index))
 150
 151         print('')
 152
 153         for f, index in functions:
 154             print('#define _gloffset_%s %s[%s_remap_index]' % (f.name, remap_table, f.name))
 155
 156         print('')
 157
 158         for f, index in abi_functions + functions:
 159             arg_string = gl_XML.create_parameter_string(f.parameters, 0)
 160
 161             print('typedef %s (GLAPIENTRYP _glptr_%s)(%s);' % (f.return_type, f.name, arg_string))
 162             print('#define CALL_%s(disp, parameters) \\' % (f.name))
 163             print('    (* GET_%s(disp)) parameters' % (f.name))
 164             print('static inline _glptr_%s GET_%s(struct _glapi_table *disp) {' % (f.name, f.name))
 165             print('   return (_glptr_%s) (GET_by_offset(disp, _gloffset_%s));' % (f.name, f.name))
 166             print('}')
 167             print()
 168             print('static inline void SET_%s(struct _glapi_table *disp, %s (GLAPIENTRYP fn)(%s)) {' % (f.name, f.return_type, arg_string))
 169             print('   SET_by_offset(disp, _gloffset_%s, fn);' % (f.name))
 170             print('}')
 171             print()
 172
 173         return
 174
 175
 176 def _parser():
 177     """Parse arguments and return a namespace."""
 178     parser = argparse.ArgumentParser()
 179     parser.add_argument('-f', '--filename',
 180                         default='gl_API.xml',
 181                         metavar="input_file_name",
 182                         dest='file_name',
 183                         help="Path to an XML description of OpenGL API.")
 184     parser.add_argument('-m', '--mode',
 185                         choices=['table', 'remap_table'],
 186                         default='table',
 187                         metavar="mode",
 188                         help="Generate either a table or a remap_table")
 189     return parser.parse_args()
 190
 191
 192 def main():
 193     """Main function."""
 194     args = _parser()
 195
 196     api = gl_XML.parse_GL_API(args.file_name)
 197
 198     if args.mode == "table":
 199         printer = PrintGlTable()
 200     elif args.mode == "remap_table":
 201         printer = PrintRemapTable()
 202
 203     printer.Print(api)
 204
 205
 206 if __name__ == '__main__':
 207     main()