3 # Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
5 # Permission is hereby granted, free of charge, to any person obtaining a
6 # copy of this software and associated documentation files (the "Software"),
7 # to deal in the Software without restriction, including without limitation
8 # on the rights to use, copy, modify, merge, publish, distribute, sub
9 # license, and/or sell copies of the Software, and to permit persons to whom
10 # the Software is furnished to do so, subject to the following conditions:
12 # The above copyright notice and this permission notice (including the next
13 # paragraph) shall be included in all copies or substantial portions of the
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 Minimal apiutil.py interface for use by es_generator.py.
36 def _ParseXML(filename, apiname):
39 'GLfloat': [ 'GLdouble' ],
40 'GLclampf': [ 'GLclampd' ],
41 'GLubyte': [ 'GLfloat', 'GLdouble' ],
42 'GLint': [ 'GLfloat', 'GLdouble' ],
43 'GLfixed': [ 'GLfloat', 'GLdouble' ],
44 'GLclampx': [ 'GLclampf', 'GLclampd' ],
47 doc = libxml2.readFile(filename, None,
48 libxml2.XML_PARSE_DTDLOAD +
49 libxml2.XML_PARSE_DTDVALID +
50 libxml2.XML_PARSE_NOBLANKS)
51 spec = APIspec.Spec(doc)
52 impl = spec.get_impl()
53 api = spec.get_api(apiname)
59 for func in api.functions:
60 alias, need_conv = impl.match(func, conversions)
62 # external functions are manually dispatched
63 if not func.is_external:
64 print >>sys.stderr, "Error: unable to dispatch %s" % func.name
68 __functions[func.name] = func
69 __aliases[func.name] = (alias, need_conv)
72 def AllSpecials(notused=None):
73 """Return a list of all external functions in the API."""
77 for func in api.functions:
79 specials.append(func.name)
84 def GetAllFunctions(filename, api):
85 """Return sorted list of all functions in the API."""
87 _ParseXML(filename, api)
91 for func in api.functions:
92 names.append(func.name)
97 def ReturnType(funcname):
98 """Return the C return type of named function."""
99 func = __functions[funcname]
100 return func.return_type
103 def Properties(funcname):
104 """Return list of properties of the named GL function."""
105 func = __functions[funcname]
106 return [func.direction]
109 def _ValidValues(func, param):
110 """Return the valid values of a parameter."""
112 switch = func.checker.switches.get(param.name, [])
114 # no dependent vector
115 if not desc.checker.switches:
116 for val in desc.values:
117 valid_values.append((val, None, None, [], desc.error, None))
120 items = desc.checker.switches.items()
122 print >>sys.stderr, "%s: more than one parameter depend on %s" % \
123 (func.name, desc.name)
124 dep_name, dep_switch = items[0]
126 for dep_desc in dep_switch:
127 if dep_desc.index >= 0 and dep_desc.index != 0:
128 print >>sys.stderr, "%s: not first element of a vector" % func.name
129 if dep_desc.checker.switches:
130 print >>sys.stderr, "%s: deep nested dependence" % func.name
132 convert = None if dep_desc.convert else "noconvert"
133 for val in desc.values:
134 valid_values.append((val, dep_desc.size_str, dep_desc.name,
135 dep_desc.values, dep_desc.error, convert))
139 def _Conversion(func, src_param):
140 """Return the destination type of the conversion, or None."""
141 alias, need_conv = __aliases[func.name]
143 dst_param = alias.get_param(src_param.name)
144 if src_param.type == dst_param.type:
147 return (None, "none")
149 converts = { True: 0, False: 0 }
151 # In Fogx, for example, pname may be GL_FOG_DENSITY/GL_FOG_START/GL_FOG_END
152 # or GL_FOG_MODE. In the former three cases, param is not checked and the
153 # default is to convert.
154 if not func.checker.always_check(src_param.name):
157 for desc in func.checker.flatten(src_param.name):
158 converts[desc.convert] += 1
159 if converts[True] and converts[False]:
162 # it should be "never", "sometimes", and "always"...
171 return (dst_param.base_type(), conversion)
174 def _MaxVecSize(func, param):
175 """Return the largest possible size of a vector."""
176 if not param.is_vector:
181 # need to look at all descriptions
183 for desc in func.checker.flatten(param.name):
184 if desc.size_str and desc.size_str.isdigit():
185 s = int(desc.size_str)
189 need_conv = __aliases[func.name][1]
191 print >>sys.stderr, \
192 "Error: unable to dicide the max size of %s in %s" % \
193 (param.name, func.name)
197 def _ParameterTuple(func, param):
198 """Return a parameter tuple.
200 [0] -- parameter name
201 [1] -- parameter type
202 [2] -- max vector size or 0
203 [3] -- dest type the parameter converts to, or None
205 [5] -- how often does the conversion happen
208 vec_size = _MaxVecSize(func, param)
209 dst_type, conversion = _Conversion(func, param)
210 valid_values = _ValidValues(func, param)
212 return (param.name, param.type, vec_size, dst_type, valid_values, conversion)
215 def Parameters(funcname):
216 """Return list of tuples of function parameters."""
217 func = __functions[funcname]
219 for param in func.params:
220 params.append(_ParameterTuple(func, param))
225 def FunctionPrefix(funcname):
226 """Return function specific prefix."""
227 func = __functions[funcname]
232 def FindParamIndex(params, paramname):
233 """Find the index of a named parameter."""
234 for i in xrange(len(params)):
235 if params[i][0] == paramname:
240 def MakeDeclarationString(params):
241 """Return a C-style parameter declaration string."""
244 sep = "" if p[1].endswith("*") else " "
245 string.append("%s%s%s" % (p[1], sep, p[0]))
248 return ", ".join(string)
251 def AliasPrefix(funcname):
252 """Return the prefix of the function the named function is an alias of."""
253 alias = __aliases[funcname][0]
258 """Return the name of the function the named function is an alias of."""
259 alias, need_conv = __aliases[funcname]
260 return alias.name if not need_conv else None
263 def ConversionFunction(funcname):
264 """Return the name of the function the named function converts to."""
265 alias, need_conv = __aliases[funcname]
266 return alias.name if need_conv else None
269 def Categories(funcname):
270 """Return all the categories of the named GL function."""