diff options
Diffstat (limited to 'mesalib/src/mesa/glapi/gen/remap_helper.py')
| -rw-r--r-- | mesalib/src/mesa/glapi/gen/remap_helper.py | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/mesalib/src/mesa/glapi/gen/remap_helper.py b/mesalib/src/mesa/glapi/gen/remap_helper.py new file mode 100644 index 000000000..8b50526d2 --- /dev/null +++ b/mesalib/src/mesa/glapi/gen/remap_helper.py @@ -0,0 +1,226 @@ +#!/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 ) |