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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)