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#!/usr/bin/python2
# (C) Copyright IBM Corporation 2004
# All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# on the rights to use, copy, modify, merge, publish, distribute, sub
# license, and/or sell copies of the Software, and to permit persons to whom
# the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice (including the next
# paragraph) shall be included in all copies or substantial portions of the
# Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
# Authors:
# Ian Romanick <idr@us.ibm.com>
from xml.sax import saxutils
from xml.sax import make_parser
from xml.sax.handler import feature_namespaces
import gl_XML
import license
import sys, getopt
class PrintGlOffsets(gl_XML.FilterGLAPISpecBase):
name = "gl_apitemp.py (from Mesa)"
def __init__(self):
gl_XML.FilterGLAPISpecBase.__init__(self)
self.license = license.bsd_license_template % ( \
"""Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
(C) Copyright IBM Corporation 2004""", "BRIAN PAUL, IBM")
def printFunction(self, f):
p_string = ""
o_string = ""
t_string = ""
comma = ""
for p in f:
cast = ""
if p.is_pointer:
t = "%p"
cast = "(const void *) "
elif p.p_type_string == 'GLenum':
t = "0x%x"
elif p.p_type_string in ['GLfloat', 'GLdouble', 'GLclampf', 'GLclampd']:
t = "%f"
else:
t = "%d"
t_string = t_string + comma + t
p_string = p_string + comma + p.p_name
o_string = o_string + comma + cast + p.p_name
comma = ", "
if f.fn_return_type != 'void':
dispatch = "RETURN_DISPATCH"
else:
dispatch = "DISPATCH"
print 'KEYWORD1 %s KEYWORD2 NAME(%s)(%s)' \
% (f.fn_return_type, f.name, f.get_parameter_string())
print '{'
if p_string == "":
print ' %s(%s, (), (F, "gl%s();\\n"));' \
% (dispatch, f.real_name, f.name)
else:
print ' %s(%s, (%s), (F, "gl%s(%s);\\n", %s));' \
% (dispatch, f.real_name, p_string, f.name, t_string, o_string)
print '}'
print ''
return
def printRealHeader(self):
print """
/*
* This file is a template which generates the OpenGL API entry point
* functions. It should be included by a .c file which first defines
* the following macros:
* KEYWORD1 - usually nothing, but might be __declspec(dllexport) on Win32
* KEYWORD2 - usually nothing, but might be __stdcall on Win32
* NAME(n) - builds the final function name (usually add "gl" prefix)
* DISPATCH(func, args, msg) - code to do dispatch of named function.
* msg is a printf-style debug message.
* RETURN_DISPATCH(func, args, msg) - code to do dispatch with a return value
*
* Here is an example which generates the usual OpenGL functions:
* #define KEYWORD1
* #define KEYWORD2
* #define NAME(func) gl##func
* #define DISPATCH(func, args, msg) \\
* struct _glapi_table *dispatch = CurrentDispatch; \\
* (*dispatch->func) args
* #define RETURN DISPATCH(func, args, msg) \\
* struct _glapi_table *dispatch = CurrentDispatch; \\
* return (*dispatch->func) args
*
*/
#ifndef KEYWORD1
#define KEYWORD1
#endif
#ifndef KEYWORD2
#define KEYWORD2
#endif
#ifndef NAME
#error NAME must be defined
#endif
#ifndef DISPATCH
#error DISPATCH must be defined
#endif
#ifndef RETURN_DISPATCH
#error RETURN_DISPATCH must be defined
#endif
GLAPI void GLAPIENTRY gl__unused413(void); /* silence warning */
"""
return
def printInitDispatch(self):
print """
/*
* This is how a dispatch table can be initialized with all the functions
* we generated above.
*/
#ifdef DISPATCH_TABLE_NAME
#ifndef TABLE_ENTRY
#error TABLE_ENTRY must be defined
#endif
static void * DISPATCH_TABLE_NAME[] = {"""
keys = self.functions.keys()
keys.sort()
for k in keys:
if k < 0: continue
print ' TABLE_ENTRY(%s),' % (self.functions[k].name)
print ' /* A whole bunch of no-op functions. These might be called'
print ' * when someone tries to call a dynamically-registered'
print ' * extension function without a current rendering context.'
print ' */'
for i in range(1, 100):
print ' TABLE_ENTRY(Unused),'
print '};'
print '#endif /* DISPATCH_TABLE_NAME */'
print ''
return
def printAliasedTable(self):
print """
/*
* This is just used to silence compiler warnings.
* We list the functions which are not otherwise used.
*/
#ifdef UNUSED_TABLE_NAME
static const void * const UNUSED_TABLE_NAME[] = {"""
keys = self.functions.keys()
keys.sort()
keys.reverse();
for k in keys:
f = self.functions[k]
if f.fn_offset < 0:
print ' TABLE_ENTRY(%s),' % (f.name)
print '};'
print '#endif /*UNUSED_TABLE_NAME*/'
print ''
return
def printRealFooter(self):
self.printInitDispatch()
self.printAliasedTable()
print"""
#undef KEYWORD1
#undef KEYWORD2
#undef NAME
#undef DISPATCH
#undef RETURN_DISPATCH
#undef DISPATCH_TABLE_NAME
#undef UNUSED_TABLE_NAME
#undef TABLE_ENTRY
"""
return
def show_usage():
print "Usage: %s [-f input_file_name]" % sys.argv[0]
sys.exit(1)
if __name__ == '__main__':
file_name = "gl_API.xml"
try:
(args, trail) = getopt.getopt(sys.argv[1:], "f:")
except Exception,e:
show_usage()
for (arg,val) in args:
if arg == "-f":
file_name = val
dh = PrintGlOffsets()
parser = make_parser()
parser.setFeature(feature_namespaces, 0)
parser.setContentHandler(dh)
f = open(file_name)
dh.printHeader()
parser.parse(f)
dh.printFooter()
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