#!/usr/bin/env python # (C) Copyright IBM Corporation 2004, 2005 # 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 import argparse import gl_XML, glX_XML import license class PrintGlOffsets(gl_XML.gl_print_base): def __init__(self, es=False): gl_XML.gl_print_base.__init__(self) self.name = "gl_apitemp.py (from Mesa)" self.license = license.bsd_license_template % ( \ """Copyright (C) 1999-2001 Brian Paul All Rights Reserved. (C) Copyright IBM Corporation 2004""", "BRIAN PAUL, IBM") self.es = es self.undef_list.append( "KEYWORD1" ) self.undef_list.append( "KEYWORD1_ALT" ) self.undef_list.append( "KEYWORD2" ) self.undef_list.append( "NAME" ) self.undef_list.append( "DISPATCH" ) self.undef_list.append( "RETURN_DISPATCH" ) self.undef_list.append( "DISPATCH_TABLE_NAME" ) self.undef_list.append( "UNUSED_TABLE_NAME" ) self.undef_list.append( "TABLE_ENTRY" ) def printFunction(self, f, name): p_string = "" o_string = "" t_string = "" comma = "" if f.is_static_entry_point(name): keyword = "KEYWORD1" else: keyword = "KEYWORD1_ALT" n = f.static_name(name) silence = '' space = '' for p in f.parameterIterator(name): if p.is_padding: continue if p.is_pointer(): cast = "(const void *) " else: cast = "" t_string = t_string + comma + p.format_string() p_string = p_string + comma + p.name o_string = o_string + comma + cast + p.name comma = ", " silence += "%s(void) %s;" % (space, p.name); space = ' ' if f.return_type != 'void': dispatch = "RETURN_DISPATCH" else: dispatch = "DISPATCH" need_proto = False if not f.is_static_entry_point(name): need_proto = True elif self.es: cat, num = api.get_category_for_name(name) if (cat.startswith("es") or cat.startswith("GL_OES")): need_proto = True if need_proto: print '%s %s KEYWORD2 NAME(%s)(%s);' % (keyword, f.return_type, n, f.get_parameter_string(name)) print '' print '%s %s KEYWORD2 NAME(%s)(%s)' % (keyword, f.return_type, n, f.get_parameter_string(name)) print '{' if silence: print ' %s' % (silence) if p_string == "": print ' %s(%s, (), (F, "gl%s();\\n"));' \ % (dispatch, f.name, name) else: print ' %s(%s, (%s), (F, "gl%s(%s);\\n", %s));' \ % (dispatch, f.name, p_string, name, t_string, o_string) print '}' print '' return def printRealHeader(self): print '' self.printVisibility( "HIDDEN", "hidden" ) 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 KEYWORD1_ALT #define KEYWORD1_ALT HIDDEN #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, api): 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 #ifdef _GLAPI_SKIP_NORMAL_ENTRY_POINTS #error _GLAPI_SKIP_NORMAL_ENTRY_POINTS must not be defined #endif _glapi_proc DISPATCH_TABLE_NAME[] = {""" for f in api.functionIterateByOffset(): print ' TABLE_ENTRY(%s),' % (f.dispatch_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, api): print """ /* * This is just used to silence compiler warnings. * We list the functions which are not otherwise used. */ #ifdef UNUSED_TABLE_NAME _glapi_proc UNUSED_TABLE_NAME[] = {""" normal_entries = [] proto_entries = [] for f in api.functionIterateByOffset(): normal_ents, proto_ents = self.classifyEntryPoints(f) # exclude f.name if f.name in normal_ents: normal_ents.remove(f.name) elif f.name in proto_ents: proto_ents.remove(f.name) normal_ents = [f.static_name(ent) for ent in normal_ents] proto_ents = [f.static_name(ent) for ent in proto_ents] normal_entries.extend(normal_ents) proto_entries.extend(proto_ents) print '#ifndef _GLAPI_SKIP_NORMAL_ENTRY_POINTS' for ent in normal_entries: print ' TABLE_ENTRY(%s),' % (ent) print '#endif /* _GLAPI_SKIP_NORMAL_ENTRY_POINTS */' print '#ifndef _GLAPI_SKIP_PROTO_ENTRY_POINTS' for ent in proto_entries: print ' TABLE_ENTRY(%s),' % (ent) print '#endif /* _GLAPI_SKIP_PROTO_ENTRY_POINTS */' print '};' print '#endif /*UNUSED_TABLE_NAME*/' print '' return def classifyEntryPoints(self, func): normal_names = [] normal_stubs = [] proto_names = [] proto_stubs = [] # classify the entry points for name in func.entry_points: if func.has_different_protocol(name): if func.is_static_entry_point(name): proto_names.append(name) else: proto_stubs.append(name) else: if func.is_static_entry_point(name): normal_names.append(name) else: normal_stubs.append(name) # there can be at most one stub for a function if normal_stubs: normal_names.append(normal_stubs[0]) elif proto_stubs: proto_names.append(proto_stubs[0]) return (normal_names, proto_names) def printBody(self, api): normal_entry_points = [] proto_entry_points = [] for func in api.functionIterateByOffset(): normal_ents, proto_ents = self.classifyEntryPoints(func) normal_entry_points.append((func, normal_ents)) proto_entry_points.append((func, proto_ents)) print '#ifndef _GLAPI_SKIP_NORMAL_ENTRY_POINTS' print '' for func, ents in normal_entry_points: for ent in ents: self.printFunction(func, ent) print '' print '#endif /* _GLAPI_SKIP_NORMAL_ENTRY_POINTS */' print '' print '/* these entry points might require different protocols */' print '#ifndef _GLAPI_SKIP_PROTO_ENTRY_POINTS' print '' for func, ents in proto_entry_points: for ent in ents: self.printFunction(func, ent) print '' print '#endif /* _GLAPI_SKIP_PROTO_ENTRY_POINTS */' print '' self.printInitDispatch(api) self.printAliasedTable(api) return def _parser(): """Parser arguments and return a namespace.""" parser = argparse.ArgumentParser() parser.add_argument('-f', metavar='', dest='filename', default="gl_API.xml", help="An XML file describing the API.") parser.add_argument('-c', action='store_true', dest='es', help="Enable OpenGL ES compatibility") return parser.parse_args() def main(): """Main function.""" args = _parser() api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory()) printer = PrintGlOffsets(args.es) printer.Print(api) if __name__ == '__main__': main()