gl_gentable.py revision 848b8605 
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
32import license
33import gl_XML, glX_XML
34import sys, getopt
35
36header = """/* 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__) && !defined(__DragonFly__))
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
68static 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
99static 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
114struct _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
126footer = """
127    __glapi_gentable_set_remaining_noop(disp);
128
129    return disp;
130}
131"""
132
133body_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
145class 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
189def show_usage():
190    print "Usage: %s [-f input_file_name]" % sys.argv[0]
191    sys.exit(1)
192
193if __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)
209