src/mapi/glapi/gen/gl_gentable.py

   1 #!/usr/bin/env python
   2
   3 # (C) Copyright IBM Corporation 2004, 2005
   4 # (C) Copyright Apple Inc. 2011
   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 #    Jeremy Huddleston <jeremyhu@apple.com>
  28 #
  29 # Based on code ogiginally by:
  30 #    Ian Romanick <idr@us.ibm.com>
  31
  32 import license
  33 import gl_XML, glX_XML
  34 import sys, getopt
  35
  36 header = """/* GLXEXT is the define used in the xserver when the GLX extension is being
  37  * built.  Hijack this to determine whether this file is being built for the
  38  * server or the client.
  39  */
  40 #ifdef HAVE_DIX_CONFIG_H
  41 #include <dix-config.h>
  42 #endif
  43
  44 #if (defined(GLXEXT) && defined(HAVE_BACKTRACE)) \\
  45         || (!defined(GLXEXT) && defined(DEBUG) && !defined(_WIN32_WCE) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__OpenBSD__) && !defined(__NetBSD__))
  46 #define USE_BACKTRACE
  47 #endif
  48
  49 #ifdef USE_BACKTRACE
  50 #include <execinfo.h>
  51 #endif
  52
  53 #ifndef _WIN32
  54 #include <dlfcn.h>
  55 #endif
  56 #include <stdlib.h>
  57 #include <stdio.h>
  58
  59 #include "main/glheader.h"
  60
  61 #include "glapi.h"
  62 #include "glapitable.h"
  63
  64 #ifdef GLXEXT
  65 #include "os.h"
  66 #endif
  67
  68 static void
  69 __glapi_gentable_NoOp(void) {
  70     const char *fstr = "Unknown";
  71
  72     /* Silence potential GCC warning for some #ifdef paths.
  73      */
  74     (void) fstr;
  75 #if defined(USE_BACKTRACE)
  76 #if !defined(GLXEXT)
  77     if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
  78 #endif
  79     {
  80         void *frames[2];
  81
  82         if(backtrace(frames, 2) == 2) {
  83             Dl_info info;
  84             dladdr(frames[1], &info);
  85             if(info.dli_sname)
  86                 fstr = info.dli_sname;
  87         }
  88
  89 #if !defined(GLXEXT)
  90         fprintf(stderr, "Call to unimplemented API: %s\\n", fstr);
  91 #endif
  92     }
  93 #endif
  94 #if defined(GLXEXT)
  95     LogMessage(X_ERROR, "GLX: Call to unimplemented API: %s\\n", fstr);
  96 #endif
  97 }
  98
  99 static void
 100 __glapi_gentable_set_remaining_noop(struct _glapi_table *disp) {
 101     GLuint entries = _glapi_get_dispatch_table_size();
 102     void **dispatch = (void **) disp;
 103     int i;
 104
 105     /* ISO C is annoying sometimes */
 106     union {_glapi_proc p; void *v;} p;
 107     p.p = __glapi_gentable_NoOp;
 108
 109     for(i=0; i < entries; i++)
 110         if(dispatch[i] == NULL)
 111             dispatch[i] = p.v;
 112 }
 113
 114 struct _glapi_table *
 115 _glapi_create_table_from_handle(void *handle, const char *symbol_prefix) {
 116     struct _glapi_table *disp = calloc(1, _glapi_get_dispatch_table_size() * sizeof(_glapi_proc));
 117     char symboln[512];
 118
 119     if(!disp)
 120         return NULL;
 121
 122     if(symbol_prefix == NULL)
 123         symbol_prefix = "";
 124 """
 125
 126 footer = """
 127     __glapi_gentable_set_remaining_noop(disp);
 128
 129     return disp;
 130 }
 131 """
 132
 133 body_template = """
 134     if(!disp->%(name)s) {
 135         void ** procp = (void **) &disp->%(name)s;
 136         snprintf(symboln, sizeof(symboln), "%%s%(entry_point)s", symbol_prefix);
 137 #ifdef _WIN32
 138         *procp = GetProcAddress(handle, symboln);
 139 #else
 140         *procp = dlsym(handle, symboln);
 141 #endif
 142     }
 143 """
 144
 145 class PrintCode(gl_XML.gl_print_base):
 146
 147     def __init__(self):
 148         gl_XML.gl_print_base.__init__(self)
 149
 150         self.name = "gl_gen_table.py (from Mesa)"
 151         self.license = license.bsd_license_template % ( \
 152 """Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
 153 (C) Copyright IBM Corporation 2004, 2005
 154 (C) Copyright Apple Inc 2011""", "BRIAN PAUL, IBM")
 155
 156         return
 157
 158
 159     def get_stack_size(self, f):
 160         size = 0
 161         for p in f.parameterIterator():
 162             if p.is_padding:
 163                 continue
 164
 165             size += p.get_stack_size()
 166
 167         return size
 168
 169
 170     def printRealHeader(self):
 171         print header
 172         return
 173
 174
 175     def printRealFooter(self):
 176         print footer
 177         return
 178
 179
 180     def printBody(self, api):
 181         for f in api.functionIterateByOffset():
 182             for entry_point in f.entry_points:
 183                 vars = { 'entry_point' : entry_point,
 184                          'name' : f.name }
 185
 186                 print body_template % vars
 187         return
 188
 189 def show_usage():
 190     print "Usage: %s [-f input_file_name]" % sys.argv[0]
 191     sys.exit(1)
 192
 193 if __name__ == '__main__':
 194     file_name = "gl_API.xml"
 195
 196     try:
 197         (args, trail) = getopt.getopt(sys.argv[1:], "m:f:")
 198     except Exception,e:
 199         show_usage()
 200
 201     for (arg,val) in args:
 202         if arg == "-f":
 203             file_name = val
 204
 205     printer = PrintCode()
 206
 207     api = gl_XML.parse_GL_API(file_name, glX_XML.glx_item_factory())
 208     printer.Print(api)