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#!/usr/bin/env python
# Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
# All Rights Reserved.
#
# This is based on extension_helper.py by Ian Romanick.
#
# 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.
import gl_XML
import license
import sys, getopt, string
def get_function_spec(func):
sig = ""
# derive parameter signature
for p in func.parameterIterator():
if p.is_padding:
continue
# FIXME: This is a *really* ugly hack. :(
tn = p.type_expr.get_base_type_node()
if p.is_pointer():
sig += 'p'
elif tn.integer:
sig += 'i'
elif tn.size == 4:
sig += 'f'
else:
sig += 'd'
spec = [sig]
for ent in func.entry_points:
spec.append("gl" + ent)
# spec is terminated by an empty string
spec.append('')
return spec
class PrintGlRemap(gl_XML.gl_print_base):
def __init__(self):
gl_XML.gl_print_base.__init__(self)
self.name = "remap_helper.py (from Mesa)"
self.license = license.bsd_license_template % ("Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>", "Chia-I Wu")
return
def printRealHeader(self):
print '#include "main/dispatch.h"'
print ''
return
def printBody(self, api):
print 'struct gl_function_remap {'
print ' GLint func_index;'
print ' GLint dispatch_offset; /* for sanity check */'
print '};'
print ''
pool_indices = {}
print '/* this is internal to remap.c */'
print '#ifdef need_MESA_remap_table'
print ''
print 'static const char _mesa_function_pool[] ='
# output string pool
index = 0;
for f in api.functionIterateAll():
pool_indices[f] = index
spec = get_function_spec(f)
# a function has either assigned offset, fixed offset,
# or no offset
if f.assign_offset:
comments = "will be remapped"
elif f.offset > 0:
comments = "offset %d" % f.offset
else:
comments = "dynamic"
print ' /* _mesa_function_pool[%d]: %s (%s) */' \
% (index, f.name, comments)
for line in spec:
print ' "%s\\0"' % line
index += len(line) + 1
print ' ;'
print ''
print '/* these functions need to be remapped */'
print 'static const struct {'
print ' GLint pool_index;'
print ' GLint remap_index;'
print '} MESA_remap_table_functions[] = {'
# output all functions that need to be remapped
# iterate by offsets so that they are sorted by remap indices
for f in api.functionIterateByOffset():
if not f.assign_offset:
continue
print ' { %5d, %s_remap_index },' \
% (pool_indices[f], f.name)
print ' { -1, -1 }'
print '};'
print ''
# collect functions by versions/extensions
extension_functions = {}
abi_extensions = []
for f in api.functionIterateAll():
for n in f.entry_points:
category, num = api.get_category_for_name(n)
# consider only GL_VERSION_X_Y or extensions
c = gl_XML.real_category_name(category)
if c.startswith("GL_"):
if not extension_functions.has_key(c):
extension_functions[c] = []
extension_functions[c].append(f)
# remember the ext names of the ABI
if (f.is_abi() and n == f.name and
c not in abi_extensions):
abi_extensions.append(c)
# ignore the ABI itself
for ext in abi_extensions:
extension_functions.pop(ext)
extensions = extension_functions.keys()
extensions.sort()
# output ABI functions that have alternative names (with ext suffix)
print '/* these functions are in the ABI, but have alternative names */'
print 'static const struct gl_function_remap MESA_alt_functions[] = {'
for ext in extensions:
funcs = []
for f in extension_functions[ext]:
# test if the function is in the ABI and has alt names
if f.is_abi() and len(f.entry_points) > 1:
funcs.append(f)
if not funcs:
continue
print ' /* from %s */' % ext
for f in funcs:
print ' { %5d, _gloffset_%s },' \
% (pool_indices[f], f.name)
print ' { -1, -1 }'
print '};'
print ''
print '#endif /* need_MESA_remap_table */'
print ''
# output remap helpers for DRI drivers
for ext in extensions:
funcs = []
remapped = []
for f in extension_functions[ext]:
if f.assign_offset:
# these are handled above
remapped.append(f)
else:
# these functions are either in the
# abi, or have offset -1
funcs.append(f)
print '#if defined(need_%s)' % (ext)
if remapped:
print '/* functions defined in MESA_remap_table_functions are excluded */'
# output extension functions that need to be mapped
print 'static const struct gl_function_remap %s_functions[] = {' % (ext)
for f in funcs:
if f.offset >= 0:
print ' { %5d, _gloffset_%s },' \
% (pool_indices[f], f.name)
else:
print ' { %5d, -1 }, /* %s */' % \
(pool_indices[f], f.name)
print ' { -1, -1 }'
print '};'
print '#endif'
print ''
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
api = gl_XML.parse_GL_API( file_name )
printer = PrintGlRemap()
printer.Print( api )
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