src/glx/apple/gen_api_library.tcl

   1 package require Tcl 8.5
   2
   3 set license {
   4 /*
   5  Copyright (c) 2008, 2009 Apple Inc.
   6
   7  Permission is hereby granted, free of charge, to any person
   8  obtaining a copy of this software and associated documentation files
   9  (the "Software"), to deal in the Software without restriction,
  10  including without limitation the rights to use, copy, modify, merge,
  11  publish, distribute, sublicense, and/or sell copies of the Software,
  12  and to permit persons to whom the Software is furnished to do so,
  13  subject to the following conditions:
  14
  15  The above copyright notice and this permission notice shall be
  16  included in all copies or substantial portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21  NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
  22  HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  23  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25  DEALINGS IN THE SOFTWARE.
  26
  27  Except as contained in this notice, the name(s) of the above
  28  copyright holders shall not be used in advertising or otherwise to
  29  promote the sale, use or other dealings in this Software without
  30  prior written authorization.
  31 */
  32 }
  33
  34 set gl_license {
  35 /*
  36 ** License Applicability. Except to the extent portions of this file are
  37 ** made subject to an alternative license as permitted in the SGI Free
  38 ** Software License B, Version 1.1 (the "License"), the contents of this
  39 ** file are subject only to the provisions of the License. You may not use
  40 ** this file except in compliance with the License. You may obtain a copy
  41 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  42 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  43 **
  44 ** http://oss.sgi.com/projects/FreeB
  45 **
  46 ** Note that, as provided in the License, the Software is distributed on an
  47 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  48 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  49 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  50 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  51 **
  52 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  53 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  54 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  55 ** Copyright in any portions created by third parties is as indicated
  56 ** elsewhere herein. All Rights Reserved.
  57 **
  58 ** Additional Notice Provisions: This software was created using the
  59 ** OpenGL(R) version 1.2.1 Sample Implementation published by SGI, but has
  60 ** not been independently verified as being compliant with the OpenGL(R)
  61 ** version 1.2.1 Specification.
  62 */
  63 }
  64
  65 set init_code {
  66 static void *glsym(void *handle, const char *name) {
  67     void *sym = dlsym(handle, name);
  68
  69     if(NULL == sym) {
  70         fprintf(stderr, "Error: symbol not found: '%s'.  "
  71                 "Error information: %s\n",
  72                 name, dlerror());
  73         abort();
  74     }
  75
  76     return sym;
  77 }
  78
  79 }
  80
  81 set dlopen_code {
  82 #ifndef LIBGLNAME
  83 #define LIBGLNAME "/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib"
  84 #endif LIBGLNAME
  85
  86     (void)dlerror(); /*drain dlerror()*/
  87
  88     handle = dlopen(LIBGLNAME, RTLD_LAZY);
  89
  90     if(NULL == handle) {
  91         fprintf(stderr, "error: unable to dlopen "
  92                 LIBGLNAME " :" "%s\n", dlerror());
  93         abort();
  94     }
  95 }
  96
  97 set this_script [info script]
  98
  99 proc main {argc argv} {
 100     if {2 != $argc} {
 101         puts stderr "syntax is: [set ::this_script] serialized-array-file output.c"
 102         return 1
 103     }
 104
 105
 106     set fd [open [lindex $argv 0] r]
 107     array set api [read $fd]
 108     close $fd
 109
 110     set fd [open [lindex $argv 1] w]
 111
 112     puts $fd "/* This file was automatically generated by [set ::this_script]. */"
 113     puts $fd $::license
 114
 115     puts $fd {
 116 #define GL_GLEXT_PROTOTYPES
 117 #include <GL/gl.h>
 118 #include <dlfcn.h>
 119 #include "glxclient.h"
 120 #include "apple_xgl_api.h"
 121 #include "apple_glx_context.h"
 122     }
 123
 124     puts $fd "struct apple_xgl_api __ogl_framework_api;"
 125
 126     set sorted [lsort -dictionary [array names api]]
 127
 128     set exclude [list DrawBuffer DrawBuffers DrawBuffersARB]
 129
 130     #These are special to glXMakeContextCurrent.
 131     #See also: apple_xgl_api_read.c.
 132     lappend exclude ReadPixels CopyPixels CopyColorTable
 133
 134     #This is excluded to work with surface updates.
 135     lappend exclude Viewport
 136
 137     foreach f $sorted {
 138         if {$f in $exclude} {
 139             continue
 140         }
 141
 142         set attr $api($f)
 143
 144         set pstr ""
 145
 146         foreach p [dict get $attr parameters] {
 147             append pstr "[lindex $p 0] [lindex $p 1], "
 148         }
 149
 150         set pstr [string trimright $pstr ", "]
 151
 152         if {![string length $pstr]} {
 153             set pstr void
 154         }
 155
 156         set callvars ""
 157
 158         foreach p [dict get $attr parameters] {
 159             append callvars "[lindex $p end], "
 160         }
 161
 162         set callvars [string trimright $callvars ", "]
 163
 164         set return ""
 165         if {"void" ne [dict get $attr return]} {
 166             set return "return "
 167         }
 168
 169         if {[dict exists $attr noop]} {
 170             if {"void" eq [dict get $attr return]} {
 171                 set body "/*noop*/"
 172             } else {
 173                 set body "return 0; /*noop*/"
 174             }
 175         } elseif {[dict exists $attr alias_for]} {
 176             set alias [dict get $attr alias_for]
 177             set body "[set return] gl[set alias]([set callvars]);"
 178         } else {
 179             set body "[set return]__ogl_framework_api.[set f]([set callvars]);"
 180         }
 181
 182         puts $fd "GLAPI [dict get $attr return] APIENTRY gl[set f]([set pstr]) \{\n\t$body\n\}"
 183     }
 184
 185     puts $fd $::init_code
 186
 187     puts $fd "void apple_xgl_init_direct(void) \{"
 188     puts $fd "\tvoid *handle;"
 189
 190     puts $fd $::dlopen_code
 191
 192     foreach f $sorted {
 193         set attr $api($f)
 194
 195         puts $attr
 196         puts $f
 197
 198         if {[dict exists $attr alias_for] || [dict exists $attr noop]} {
 199             #Function f is an alias_for another, so we shouldn't try
 200             #to load it.
 201             continue
 202         }
 203
 204         puts $fd "\t__ogl_framework_api.$f = glsym(handle, \"gl$f\");"
 205     }
 206
 207     puts $fd "\}\n"
 208     close $fd
 209
 210     return 0
 211 }
 212 exit [main $::argc $::argv]