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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 

import gl_XML

import license

import sys, getopt

class PrintGlTable(gl_XML.gl_print_base):

	def __init__(self, es=False):

		gl_XML.gl_print_base.__init__(self)

		self.es = es

		self.header_tag = '_GLAPI_TABLE_H_'

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

		self.license = license.bsd_license_template % ( \

"""Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.

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

		return

	def printBody(self, api):

		for f in api.functionIterateByOffset():

			arg_string = f.get_parameter_string()

			print '   %s (GLAPIENTRYP %s)(%s); /* %d */' % (f.return_type, f.name, arg_string, f.offset)

	def printRealHeader(self):

		print '#ifndef GLAPIENTRYP'

		print '# ifndef GLAPIENTRY'

		print '#  define GLAPIENTRY'

		print '# endif'

		print ''

		print '# define GLAPIENTRYP GLAPIENTRY *'

		print '#endif'

		print ''

		print ''

		print 'struct _glapi_table'

		print '{'

		return

	def printRealFooter(self):

		print '};'

		return

class PrintRemapTable(gl_XML.gl_print_base):

	def __init__(self, es=False):

		gl_XML.gl_print_base.__init__(self)

		self.es = es

		self.header_tag = '_GLAPI_DISPATCH_H_'

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

		self.license = license.bsd_license_template % ("(C) Copyright IBM Corporation 2005", "IBM")

		return

	def printRealHeader(self):

		print """

/* this file should not be included directly in mesa */

/**

 * \\file glapidispatch.h

 * Macros for handling GL dispatch tables.

 *

 * For each known GL function, there are 3 macros in this file.  The first

 * macro is named CALL_FuncName and is used to call that GL function using

 * the specified dispatch table.  The other 2 macros, called GET_FuncName

 * can SET_FuncName, are used to get and set the dispatch pointer for the

 * named function in the specified dispatch table.

 */

"""

		return

	def printBody(self, api):

		print '#define CALL_by_offset(disp, cast, offset, parameters) \\'

		print '    (*(cast (GET_by_offset(disp, offset)))) parameters'

		print '#define GET_by_offset(disp, offset) \\'

		print '    (offset >= 0) ? (((_glapi_proc *)(disp))[offset]) : NULL'

		print '#define SET_by_offset(disp, offset, fn) \\'

		print '    do { \\'

		print '        if ( (offset) < 0 ) { \\'

		print '            /* fprintf( stderr, "[%s:%u] SET_by_offset(%p, %d, %s)!\\n", */ \\'

		print '            /*         __func__, __LINE__, disp, offset, # fn); */ \\'

		print '            /* abort(); */ \\'

		print '        } \\'

		print '        else { \\'

		print '            ( (_glapi_proc *) (disp) )[offset] = (_glapi_proc) fn; \\'

		print '        } \\'

		print '    } while(0)'

		print ''

		functions = []

		abi_functions = []

		alias_functions = []

		count = 0

		for f in api.functionIterateByOffset():

			if not f.is_abi():

				functions.append( [f, count] )

				count += 1

			else:

				abi_functions.append( [f, -1] )

			if self.es:

				# remember functions with aliases

				if len(f.entry_points) > 1:

					alias_functions.append(f)

		print '/* total number of offsets below */'

		print '#define _gloffset_COUNT %d' % (len(abi_functions + functions))

		print ''

		for f, index in abi_functions:

			print '#define _gloffset_%s %d' % (f.name, f.offset)

		print ''

		print '#if !defined(_GLAPI_USE_REMAP_TABLE)'

		print ''

		for f, index in functions:

			print '#define _gloffset_%s %d' % (f.name, f.offset)

		print ''

		print '#else /* !_GLAPI_USE_REMAP_TABLE */'

		print ''

		print '#define driDispatchRemapTable_size %u' % (count)

		print 'extern int driDispatchRemapTable[ driDispatchRemapTable_size ];'

		print ''

		for f, index in functions:

			print '#define %s_remap_index %u' % (f.name, index)

		print ''

		for f, index in functions:

			print '#define _gloffset_%s driDispatchRemapTable[%s_remap_index]' % (f.name, f.name)

		print ''

		print '#endif /* _GLAPI_USE_REMAP_TABLE */'

		print ''

		for f, index in abi_functions + functions:

			arg_string = gl_XML.create_parameter_string( f.parameters, 0 )

			cast = '%s (GLAPIENTRYP)(%s)' % (f.return_type, arg_string)

			print '#define CALL_%s(disp, parameters) CALL_by_offset(disp, (%s), _gloffset_%s, parameters)' % (f.name, cast, f.name)

			print '#define GET_%s(disp) GET_by_offset(disp, _gloffset_%s)' % (f.name, f.name)

			print '#define SET_%s(disp, fn) SET_by_offset(disp, _gloffset_%s, fn)' % (f.name, f.name)

		if alias_functions:

			print ''

			print '/* define aliases for compatibility */'

			for f in alias_functions:

				for name in f.entry_points:

					if name != f.name:

						print '#define CALL_%s(disp, parameters) CALL_%s(disp, parameters)' % (name, f.name)

						print '#define GET_%s(disp) GET_%s(disp)' % (name, f.name)

						print '#define SET_%s(disp, fn) SET_%s(disp, fn)' % (name, f.name)

			print ''

			print '#if defined(_GLAPI_USE_REMAP_TABLE)'

			for f in alias_functions:

				for name in f.entry_points:

					if name != f.name:

						print '#define %s_remap_index %s_remap_index' % (name, f.name)

			print '#endif /* defined(_GLAPI_USE_REMAP_TABLE) */'

			print ''

		return

def show_usage():

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

	print "    -m mode   Mode can be 'table' or 'remap_table'."

	print "    -c        Enable compatibility with OpenGL ES."

	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()

	mode = "table"

	es = False

	for (arg,val) in args:

		if arg == "-f":

			file_name = val

		elif arg == "-m":

			mode = val

		elif arg == "-c":

			es = True

	if mode == "table":

		printer = PrintGlTable(es)

	elif mode == "remap_table":

		printer = PrintRemapTable(es)

	else:

		show_usage()

	api = gl_XML.parse_GL_API( file_name )

	printer.Print( api )