#!/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.parameterIterator(): 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.name o_string = o_string + comma + cast + 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 * */ #if defined( NAME ) #ifndef KEYWORD1 #define KEYWORD1 #endif #ifndef KEYWORD2 #define KEYWORD2 #endif #ifndef DISPATCH #error DISPATCH must be defined #endif #ifndef RETURN_DISPATCH #error RETURN_DISPATCH must be defined #endif """ return def printInitDispatch(self): print """ #endif /* defined( NAME ) */ /* * 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 _glapi_proc DISPATCH_TABLE_NAME[] = {""" for f in self.functionIterator(): if f.fn_offset < 0: continue print ' TABLE_ENTRY(%s),' % (f.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 _glapi_proc UNUSED_TABLE_NAME[] = {""" for f in self.functionIterator(): 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()