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 # Copyright (C) 2015 Intel Corporation
   6 # All Rights Reserved.
   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 # Authors:
  28 #    Jeremy Huddleston <jeremyhu@apple.com>
  29 #
  30 # Based on code ogiginally by:
  31 #    Ian Romanick <idr@us.ibm.com>
  32
  33 import argparse
  34
  35 import license
  36 import gl_XML, glX_XML
  37
  38 header = """/* GLXEXT is the define used in the xserver when the GLX extension is being
  39  * built.  Hijack this to determine whether this file is being built for the
  40  * server or the client.
  41  */
  42 #ifdef HAVE_DIX_CONFIG_H
  43 #include <dix-config.h>
  44 #endif
  45
  46 #if (defined(GLXEXT) && defined(HAVE_BACKTRACE)) \\
  47         || (!defined(GLXEXT) && defined(DEBUG) && !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__))
  48 #define USE_BACKTRACE
  49 #endif
  50
  51 #ifdef USE_BACKTRACE
  52 #include <execinfo.h>
  53 #endif
  54
  55 #ifndef _WIN32
  56 #include <dlfcn.h>
  57 #endif
  58 #include <stdlib.h>
  59 #include <stdio.h>
  60
  61 #include "main/glheader.h"
  62
  63 #include "glapi.h"
  64 #include "glapitable.h"
  65
  66 #ifdef GLXEXT
  67 #include "os.h"
  68 #endif
  69
  70 static void
  71 __glapi_gentable_NoOp(void) {
  72     const char *fstr = "Unknown";
  73
  74     /* Silence potential GCC warning for some #ifdef paths.
  75      */
  76     (void) fstr;
  77 #if defined(USE_BACKTRACE)
  78 #if !defined(GLXEXT)
  79     if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
  80 #endif
  81     {
  82         void *frames[2];
  83
  84         if(backtrace(frames, 2) == 2) {
  85             Dl_info info;
  86             dladdr(frames[1], &info);
  87             if(info.dli_sname)
  88                 fstr = info.dli_sname;
  89         }
  90
  91 #if !defined(GLXEXT)
  92         fprintf(stderr, "Call to unimplemented API: %s\\n", fstr);
  93 #endif
  94     }
  95 #endif
  96 #if defined(GLXEXT)
  97     LogMessage(X_ERROR, "GLX: Call to unimplemented API: %s\\n", fstr);
  98 #endif
  99 }
 100
 101 static void
 102 __glapi_gentable_set_remaining_noop(struct _glapi_table *disp) {
 103     GLuint entries = _glapi_get_dispatch_table_size();
 104     void **dispatch = (void **) disp;
 105     unsigned i;
 106
 107     /* ISO C is annoying sometimes */
 108     union {_glapi_proc p; void *v;} p;
 109     p.p = __glapi_gentable_NoOp;
 110
 111     for(i=0; i < entries; i++)
 112         if(dispatch[i] == NULL)
 113             dispatch[i] = p.v;
 114 }
 115
 116 struct _glapi_table *
 117 _glapi_create_table_from_handle(void *handle, const char *symbol_prefix) {
 118     struct _glapi_table *disp = calloc(_glapi_get_dispatch_table_size(), sizeof(_glapi_proc));
 119     char symboln[512];
 120
 121     if(!disp)
 122         return NULL;
 123
 124     if(symbol_prefix == NULL)
 125         symbol_prefix = "";
 126 """
 127
 128 footer = """
 129     __glapi_gentable_set_remaining_noop(disp);
 130
 131     return disp;
 132 }
 133 """
 134
 135 body_template = """
 136     if(!disp->%(name)s) {
 137         void ** procp = (void **) &disp->%(name)s;
 138         snprintf(symboln, sizeof(symboln), "%%s%(entry_point)s", symbol_prefix);
 139 #ifdef _WIN32
 140         *procp = GetProcAddress(handle, symboln);
 141 #else
 142         *procp = dlsym(handle, symboln);
 143 #endif
 144     }
 145 """
 146
 147 class PrintCode(gl_XML.gl_print_base):
 148
 149     def __init__(self):
 150         gl_XML.gl_print_base.__init__(self)
 151
 152         self.name = "gl_gentable.py (from Mesa)"
 153         self.license = license.bsd_license_template % ( \
 154 """Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
 155 (C) Copyright IBM Corporation 2004, 2005
 156 (C) Copyright Apple Inc 2011""", "BRIAN PAUL, IBM")
 157
 158         return
 159
 160
 161     def get_stack_size(self, f):
 162         size = 0
 163         for p in f.parameterIterator():
 164             if p.is_padding:
 165                 continue
 166
 167             size += p.get_stack_size()
 168
 169         return size
 170
 171
 172     def printRealHeader(self):
 173         print header
 174         return
 175
 176
 177     def printRealFooter(self):
 178         print footer
 179         return
 180
 181
 182     def printBody(self, api):
 183         for f in api.functionIterateByOffset():
 184             for entry_point in f.entry_points:
 185                 vars = { 'entry_point' : entry_point,
 186                          'name' : f.name }
 187
 188                 print body_template % vars
 189         return
 190
 191
 192 def _parser():
 193     """Parse arguments and return a namespace object."""
 194     parser = argparse.ArgumentParser()
 195     parser.add_argument('-f',
 196                         dest='filename',
 197                         default='gl_API.xml',
 198                         help='An XML file description of an API')
 199
 200     return parser.parse_args()
 201
 202
 203 if __name__ == '__main__':
 204     args = _parser()
 205
 206     printer = PrintCode()
 207
 208     api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory())
 209     printer.Print(api)