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#!/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 license

import gl_XML, glX_XML

import sys, getopt

class PrintGlProcs(gl_XML.gl_print_base):

    def __init__(self, long_strings, es=False):

        gl_XML.gl_print_base.__init__(self)

        self.es = es

        self.long_strings = long_strings

        self.name = "gl_procs.py (from Mesa)"

        self.license = license.bsd_license_template % ( \

"""Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.

(C) Copyright IBM Corporation 2004, 2006""", "BRIAN PAUL, IBM")

    def printRealHeader(self):

        print """

/* This file is only included by glapi.c and is used for

 * the GetProcAddress() function

 */

typedef struct {

    GLint Name_offset;

#if defined(NEED_FUNCTION_POINTER) || defined(GLX_INDIRECT_RENDERING)

    _glapi_proc Address;

#endif

    GLuint Offset;

} glprocs_table_t;

#if   !defined(NEED_FUNCTION_POINTER) && !defined(GLX_INDIRECT_RENDERING)

#  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , o }

#elif  defined(NEED_FUNCTION_POINTER) && !defined(GLX_INDIRECT_RENDERING)

#  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , (_glapi_proc) f1 , o }

#elif  defined(NEED_FUNCTION_POINTER) &&  defined(GLX_INDIRECT_RENDERING)

#  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , (_glapi_proc) f2 , o }

#elif !defined(NEED_FUNCTION_POINTER) &&  defined(GLX_INDIRECT_RENDERING)

#  define NAME_FUNC_OFFSET(n,f1,f2,f3,o) { n , (_glapi_proc) f3 , o }

#endif

"""

        return

    def printRealFooter(self):

        print ''

        print '#undef NAME_FUNC_OFFSET'

        return

    def printFunctionString(self, name):

        if self.long_strings:

            print '    "gl%s\\0"' % (name)

        else:

            print "    'g','l',",

            for c in name:

                print "'%s'," % (c),

            print "'\\0',"

    def printBody(self, api):

        print ''

        if self.long_strings:

            print 'static const char gl_string_table[] ='

        else:

            print 'static const char gl_string_table[] = {'

        base_offset = 0

        table = []

        for func in api.functionIterateByOffset():

            name = func.dispatch_name()

            self.printFunctionString(func.name)

            table.append((base_offset, "gl" + name, "gl" + name, "NULL", func.offset))

            # The length of the function's name, plus 2 for "gl",

            # plus 1 for the NUL.

            base_offset += len(func.name) + 3

        for func in api.functionIterateByOffset():

            for n in func.entry_points:

                if n != func.name:

                    name = func.dispatch_name()

                    self.printFunctionString( n )

                    if func.has_different_protocol(n):

                        alt_name = "gl" + func.static_glx_name(n)

                        table.append((base_offset, "gl" + name, alt_name, alt_name, func.offset))

                    else:

                        table.append((base_offset, "gl" + name, "gl" + name, "NULL", func.offset))

                    base_offset += len(n) + 3

        if self.long_strings:

            print '    ;'

        else:

            print '};'

        print ''

        print ''

        print "#ifdef USE_MGL_NAMESPACE"

        for func in api.functionIterateByOffset():

            for n in func.entry_points:

                if (not func.is_static_entry_point(func.name)) or (func.has_different_protocol(n) and not func.is_static_entry_point(n)):

                    print '#define gl_dispatch_stub_%u mgl_dispatch_stub_%u' % (func.offset, func.offset)

                    break

        print "#endif /* USE_MGL_NAMESPACE */"

        print ''

        print ''

        print '#if defined(NEED_FUNCTION_POINTER) || defined(GLX_INDIRECT_RENDERING)'

        for func in api.functionIterateByOffset():

            for n in func.entry_points:

                if (not func.is_static_entry_point(func.name)) or (func.has_different_protocol(n) and not func.is_static_entry_point(n)):

                    print '%s GLAPIENTRY gl_dispatch_stub_%u(%s);' % (func.return_type, func.offset, func.get_parameter_string())

                    break

        if self.es:

            categories = {}

            for func in api.functionIterateByOffset():

                for n in func.entry_points:

                    cat, num = api.get_category_for_name(n)

                    if (cat.startswith("es") or cat.startswith("GL_OES")):

                        if not categories.has_key(cat):

                            categories[cat] = []

                        proto = 'GLAPI %s GLAPIENTRY %s(%s);' \

                                        % (func.return_type, "gl" + n, func.get_parameter_string(n))

                        categories[cat].append(proto)

            if categories:

                print ''

                print '/* OpenGL ES specific prototypes */'

                print ''

                keys = categories.keys()

                keys.sort()

                for key in keys:

                    print '/* category %s */' % key

                    print "\n".join(categories[key])

                print ''

        print '#endif /* defined(NEED_FUNCTION_POINTER) || defined(GLX_INDIRECT_RENDERING) */'

        print ''

        print 'static const glprocs_table_t static_functions[] = {'

        for info in table:

            print '    NAME_FUNC_OFFSET(%5u, %s, %s, %s, %d),' % info

        print '    NAME_FUNC_OFFSET(-1, NULL, NULL, NULL, 0)'

        print '};'

        return

def show_usage():

    print "Usage: %s [-f input_file_name] [-m mode] [-c]" % sys.argv[0]

    print "-c          Enable compatibility with OpenGL ES."

    print "-m mode     mode can be one of:"

    print "    long  - Create code for compilers that can handle very"

    print "            long string constants. (default)"

    print "    short - Create code for compilers that can only handle"

    print "            ANSI C89 string constants."

    sys.exit(1)

if __name__ == '__main__':

    file_name = "gl_API.xml"

    try:

        (args, trail) = getopt.getopt(sys.argv[1:], "f:m:c")

    except Exception,e:

        show_usage()

    long_string = 1

    es = False

    for (arg,val) in args:

        if arg == "-f":

            file_name = val

        elif arg == "-m":

            if val == "short":

                long_string = 0

            elif val == "long":

                long_string = 1

            else:

                show_usage()

        elif arg == "-c":

            es = True

    api = gl_XML.parse_GL_API(file_name, glX_XML.glx_item_factory())

    printer = PrintGlProcs(long_string, es)

    printer.Print(api)