gl_gentable.py revision bc35da409baff63a9928eca4c0ce673dd9288786 
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))
46#define USE_BACKTRACE
47#endif
48
49#ifdef USE_BACKTRACE
50#include <execinfo.h>
51#endif
52
53#include <dlfcn.h>
54#include <stdlib.h>
55#include <stdio.h>
56
57#include <GL/gl.h>
58
59#include "glapi.h"
60#include "glapitable.h"
61
62#ifdef GLXEXT
63#include "os.h"
64#endif
65
66static void
67__glapi_gentable_NoOp(void) {
68    const char *fstr = "Unknown";
69
70    /* Silence potential GCC warning for some #ifdef paths.
71     */
72    (void) fstr;
73#if defined(USE_BACKTRACE)
74#if !defined(GLXEXT)
75    if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
76#endif
77    {
78        void *frames[2];
79
80        if(backtrace(frames, 2) == 2) {
81            Dl_info info;
82            dladdr(frames[1], &info);
83            if(info.dli_sname)
84                fstr = info.dli_sname;
85        }
86
87#if !defined(GLXEXT)
88        fprintf(stderr, "Call to unimplemented API: %s\\n", fstr);
89#endif
90    }
91#endif
92#if defined(GLXEXT)
93    LogMessage(X_ERROR, "GLX: Call to unimplemented API: %s\\n", fstr);
94#endif
95}
96
97static void
98__glapi_gentable_set_remaining_noop(struct _glapi_table *disp) {
99    GLuint entries = _glapi_get_dispatch_table_size();
100    void **dispatch = (void **) disp;
101    int i;
102
103    /* ISO C is annoying sometimes */
104    union {_glapi_proc p; void *v;} p;
105    p.p = __glapi_gentable_NoOp;
106
107    for(i=0; i < entries; i++)
108        if(dispatch[i] == NULL)
109            dispatch[i] = p.v;
110}
111
112struct _glapi_table *
113_glapi_create_table_from_handle(void *handle, const char *symbol_prefix) {
114    struct _glapi_table *disp = calloc(1, sizeof(struct _glapi_table));
115    char symboln[512];
116
117    if(!disp)
118        return NULL;
119
120    if(symbol_prefix == NULL)
121        symbol_prefix = "";
122"""
123
124footer = """
125    __glapi_gentable_set_remaining_noop(disp);
126
127    return disp;
128}
129"""
130
131body_template = """
132    if(!disp->%(name)s) {
133        void ** procp = (void **) &disp->%(name)s;
134        snprintf(symboln, sizeof(symboln), "%%s%(entry_point)s", symbol_prefix);
135        *procp = dlsym(handle, symboln);
136    }
137"""
138
139class PrintCode(gl_XML.gl_print_base):
140
141	def __init__(self):
142		gl_XML.gl_print_base.__init__(self)
143
144		self.name = "gl_gen_table.py (from Mesa)"
145		self.license = license.bsd_license_template % ( \
146"""Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
147(C) Copyright IBM Corporation 2004, 2005
148(C) Copyright Apple Inc 2011""", "BRIAN PAUL, IBM")
149
150		return
151
152
153	def get_stack_size(self, f):
154		size = 0
155		for p in f.parameterIterator():
156			if p.is_padding:
157				continue
158
159			size += p.get_stack_size()
160
161		return size
162
163
164	def printRealHeader(self):
165		print header
166		return
167
168
169	def printRealFooter(self):
170		print footer
171		return
172
173
174	def printBody(self, api):
175		for f in api.functionIterateByOffset():
176			for entry_point in f.entry_points:
177				vars = { 'entry_point' : entry_point,
178				         'name' : f.name }
179
180				print body_template % vars
181		return
182
183def show_usage():
184	print "Usage: %s [-f input_file_name]" % sys.argv[0]
185	sys.exit(1)
186
187if __name__ == '__main__':
188	file_name = "gl_API.xml"
189
190	try:
191		(args, trail) = getopt.getopt(sys.argv[1:], "m:f:")
192	except Exception,e:
193		show_usage()
194
195	for (arg,val) in args:
196		if arg == "-f":
197			file_name = val
198
199	printer = PrintCode()
200
201	api = gl_XML.parse_GL_API(file_name, glX_XML.glx_item_factory())
202	printer.Print(api)
203