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# Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
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# This is based on extension_helper.py by Ian Romanick.
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# on the rights to use, copy, modify, merge, publish, distribute, sub
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# license, and/or sell copies of the Software, and to permit persons to whom
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# the Software is furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice (including the next
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# paragraph) shall be included in all copies or substantial portions of the
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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import sys, getopt, string
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def get_function_spec(func):
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# derive parameter signature
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for p in func.parameterIterator():
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# FIXME: This is a *really* ugly hack. :(
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tn = p.type_expr.get_base_type_node()
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for ent in func.entry_points:
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spec.append("gl" + ent)
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# spec is terminated by an empty string
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class PrintGlRemap(gl_XML.gl_print_base):
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gl_XML.gl_print_base.__init__(self)
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self.name = "remap_helper.py (from Mesa)"
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self.license = license.bsd_license_template % ("Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>", "Chia-I Wu")
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def printRealHeader(self):
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print '#include "main/dispatch.h"'
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def printBody(self, api):
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print 'struct gl_function_remap {'
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print ' GLint func_index;'
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print ' GLint dispatch_offset; /* for sanity check */'
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print '/* this is internal to remap.c */'
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print '#ifdef need_MESA_remap_table'
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print 'static const char _mesa_function_pool[] ='
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for f in api.functionIterateAll():
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pool_indices[f] = index
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spec = get_function_spec(f)
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# a function has either assigned offset, fixed offset,
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comments = "will be remapped"
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comments = "offset %d" % f.offset
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print ' /* _mesa_function_pool[%d]: %s (%s) */' \
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% (index, f.name, comments)
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print ' "%s\\0"' % line
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index += len(line) + 1
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print '/* these functions need to be remapped */'
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print 'static const struct {'
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print ' GLint pool_index;'
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print ' GLint remap_index;'
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print '} MESA_remap_table_functions[] = {'
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# output all functions that need to be remapped
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# iterate by offsets so that they are sorted by remap indices
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for f in api.functionIterateByOffset():
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if not f.assign_offset:
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print ' { %5d, %s_remap_index },' \
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% (pool_indices[f], f.name)
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# collect functions by versions/extensions
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extension_functions = {}
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for f in api.functionIterateAll():
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for n in f.entry_points:
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category, num = api.get_category_for_name(n)
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# consider only GL_VERSION_X_Y or extensions
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c = gl_XML.real_category_name(category)
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if c.startswith("GL_"):
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if not extension_functions.has_key(c):
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extension_functions[c] = []
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extension_functions[c].append(f)
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# remember the ext names of the ABI
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if (f.is_abi() and n == f.name and
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c not in abi_extensions):
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abi_extensions.append(c)
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# ignore the ABI itself
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for ext in abi_extensions:
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extension_functions.pop(ext)
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extensions = extension_functions.keys()
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# output ABI functions that have alternative names (with ext suffix)
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print '/* these functions are in the ABI, but have alternative names */'
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print 'static const struct gl_function_remap MESA_alt_functions[] = {'
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for ext in extensions:
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for f in extension_functions[ext]:
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# test if the function is in the ABI and has alt names
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if f.is_abi() and len(f.entry_points) > 1:
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print ' /* from %s */' % ext
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print ' { %5d, _gloffset_%s },' \
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% (pool_indices[f], f.name)
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print '#endif /* need_MESA_remap_table */'
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# output remap helpers for DRI drivers
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for ext in extensions:
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for f in extension_functions[ext]:
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# these are handled above
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# these functions are either in the
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# abi, or have offset -1
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print '#if defined(need_%s)' % (ext)
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print '/* functions defined in MESA_remap_table_functions are excluded */'
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# output extension functions that need to be mapped
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print 'static const struct gl_function_remap %s_functions[] = {' % (ext)
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print ' { %5d, _gloffset_%s },' \
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% (pool_indices[f], f.name)
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print ' { %5d, -1 }, /* %s */' % \
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(pool_indices[f], f.name)
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print "Usage: %s [-f input_file_name]" % sys.argv[0]
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if __name__ == '__main__':
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file_name = "gl_API.xml"
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(args, trail) = getopt.getopt(sys.argv[1:], "f:")
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for (arg,val) in args:
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api = gl_XML.parse_GL_API( file_name )
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printer = PrintGlRemap()