src/mesa/glapi/gl_XML.py

   1 #!/usr/bin/python2
   2
   3 # (C) Copyright IBM Corporation 2004, 2005
   4 # All Rights Reserved.
   5 #
   6 # Permission is hereby granted, free of charge, to any person obtaining a
   7 # copy of this software and associated documentation files (the "Software"),
   8 # to deal in the Software without restriction, including without limitation
   9 # on the rights to use, copy, modify, merge, publish, distribute, sub
  10 # license, and/or sell copies of the Software, and to permit persons to whom
  11 # the Software is furnished to do so, subject to the following conditions:
  12 #
  13 # The above copyright notice and this permission notice (including the next
  14 # paragraph) shall be included in all copies or substantial portions of the
  15 # Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23 # IN THE SOFTWARE.
  24 #
  25 # Authors:
  26 #    Ian Romanick <idr@us.ibm.com>
  27
  28 from xml.sax import saxutils
  29 from xml.sax import make_parser
  30 from xml.sax.handler import feature_namespaces
  31
  32 import re
  33
  34 class glItem:
  35         """Generic class on which all other API entity types are based."""
  36
  37         def __init__(self, tag_name, name, context):
  38                 self.name = name
  39                 self.category = context.get_category_define()
  40                 self.context = context
  41                 self.tag_name = tag_name
  42
  43                 context.append(tag_name, self)
  44                 return
  45
  46         def startElement(self, name, attrs):
  47                 """Generic startElement handler.
  48
  49                 The startElement handler is called for all elements except
  50                 the one that starts the object.  For a foo element, the
  51                 XML "<foo><bar/></foo>" would cause the startElement handler
  52                 to be called once, but the endElement handler would be called
  53                 twice."""
  54                 return
  55
  56         def endElement(self, name):
  57                 """Generic endElement handler.
  58
  59                 Generic endElement handler.    Returns 1 if the tag containing
  60                 the object is complete.  Otherwise 0 is returned.  All
  61                 derived class endElement handlers should call this method.  If
  62                 the name of the ending tag is the same as the tag that
  63                 started this object, the object is assumed to be complete.
  64
  65                 This fails if a tag can contain another tag with the same
  66                 name.  The XML "<foo><foo/><bar/></foo>" would fail.  The
  67                 object would end before the bar tag was processed.
  68
  69                 The endElement handler is called for every end element
  70                 associated with an object, even the element that started the
  71                 object.  See the description of startElement an example."""
  72
  73                 if name == self.tag_name:
  74                         return 1
  75                 else:
  76                         return 0
  77
  78         def get_category_define(self):
  79                 return self.category
  80
  81
  82 class glEnum( glItem ):
  83         """Subclass of glItem for representing GL enumerants.
  84
  85         This class is not complete, and is not really used yet."""
  86
  87         def __init__(self, context, name, attrs):
  88                 self.value = int(attrs.get('value', "0x0000"), 0)
  89
  90                 enum_name = "GL_" + attrs.get('name', None)
  91                 glItem.__init__(self, name, enum_name, context)
  92
  93                 temp = attrs.get('count', None)
  94                 if temp == None:
  95                         self.default_count = 0
  96                 else:
  97                         try:
  98                                 c = int(temp)
  99                         except Exception,e:
 100                                 raise RuntimeError('Invalid count value "%s" for enum "%s" in function "%s" when an integer was expected.' % (temp, self.name, n))
 101
 102                         self.default_count = c
 103                 return
 104
 105
 106         def process_attributes(self, attrs):
 107                 name = attrs.get('name', None)
 108
 109                 temp = attrs.get('count', None)
 110                 if temp == None:
 111                         c = self.default_count
 112                 else:
 113                         try:
 114                                 c = int(temp)
 115                         except Exception,e:
 116                                 raise RuntimeError('Invalid count value "%s" for enum "%s" in function "%s" when an integer was expected.' % (temp, self.name, n))
 117
 118                 mode_str = attrs.get('mode', "set")
 119                 if mode_str == "set":
 120                         mode = 1
 121                 elif mode_str == "get":
 122                         mode = 0
 123                 else:
 124                         raise RuntimeError("Invalid mode '%s' for function '%s' in enum '%s'." % (mode_str, self.context.name, self.name))
 125
 126                 return [name, c, mode]
 127
 128
 129 class glType( glItem ):
 130         """Subclass of glItem for representing GL types."""
 131
 132         def __init__(self, context, name, attrs):
 133                 self.size = int(attrs.get('size', "0"))
 134                 self.glx_name = attrs.get('glx_name', "")
 135
 136                 type_name = "GL" + attrs.get('name', None)
 137                 glItem.__init__(self, name, type_name, context)
 138
 139
 140 class glParameter( glItem ):
 141         """Parameter of a glFunction."""
 142         p_type = None
 143         p_type_string = ""
 144         p_count = 0
 145         p_count_parameters = None
 146         counter = None
 147         is_output = 0
 148         is_counter = 0
 149         is_pointer = 0
 150
 151         def __init__(self, context, name, attrs):
 152                 p_name = attrs.get('name', None)
 153                 self.p_type_string = attrs.get('type', None)
 154                 self.p_count_parameters = attrs.get('variable_param', None)
 155
 156                 self.p_type = context.context.find_type(self.p_type_string)
 157                 if self.p_type == None:
 158                         raise RuntimeError("Unknown type '%s' in function '%s'." % (self.p_type_string, context.name))
 159
 160
 161                 # The count tag can be either a numeric string or the name of
 162                 # a variable.  If it is the name of a variable, the int(c)
 163                 # statement will throw an exception, and the except block will
 164                 # take over.
 165
 166                 c = attrs.get('count', "0")
 167                 try:
 168                         self.p_count = int(c)
 169                         self.counter = None
 170                 except Exception,e:
 171                         self.p_count = 0
 172                         self.counter = c
 173
 174                 if attrs.get('counter', "false") == "true":
 175                         self.is_counter = 1
 176                 else:
 177                         self.is_counter = 0
 178
 179                 if attrs.get('output', "false") == "true":
 180                         self.is_output = 1
 181                 else:
 182                         self.is_output = 0
 183
 184
 185                 # Pixel data has special parameters.
 186
 187                 self.width      = attrs.get('img_width',  None)
 188                 self.height     = attrs.get('img_height', None)
 189                 self.depth      = attrs.get('img_depth',  None)
 190                 self.extent     = attrs.get('img_extent', None)
 191
 192                 self.img_xoff   = attrs.get('img_xoff',   None)
 193                 self.img_yoff   = attrs.get('img_yoff',   None)
 194                 self.img_zoff   = attrs.get('img_zoff',   None)
 195                 self.img_woff   = attrs.get('img_woff',   None)
 196
 197                 self.img_format = attrs.get('img_format', None)
 198                 self.img_type   = attrs.get('img_type',   None)
 199                 self.img_target = attrs.get('img_target', None)
 200
 201                 pad = attrs.get('img_pad_dimensions', "false")
 202                 if pad == "true":
 203                         self.img_pad_dimensions = 1
 204                 else:
 205                         self.img_pad_dimensions = 0
 206
 207
 208                 null_flag = attrs.get('img_null_flag', "false")
 209                 if null_flag == "true":
 210                         self.img_null_flag = 1
 211                 else:
 212                         self.img_null_flag = 0
 213
 214                 send_null = attrs.get('img_send_null', "false")
 215                 if send_null == "true":
 216                         self.img_send_null = 1
 217                 else:
 218                         self.img_send_null = 0
 219
 220
 221
 222                 if self.p_count > 0 or self.counter or self.p_count_parameters:
 223                         has_count = 1
 224                 else:
 225                         has_count = 0
 226
 227
 228                 # If there is a * anywhere in the parameter's type, then it
 229                 # is a pointer.
 230
 231                 if re.compile("[*]").search(self.p_type_string):
 232                         # We could do some other validation here.  For
 233                         # example, an output parameter should not be const,
 234                         # but every non-output parameter should.
 235
 236                         self.is_pointer = 1;
 237                 else:
 238                         # If a parameter is not a pointer, then there cannot
 239                         # be an associated count (either fixed size or
 240                         # variable) and the parameter cannot be an output.
 241
 242                         if has_count or self.is_output:
 243                                 raise RuntimeError("Non-pointer type has count or is output.")
 244                         self.is_pointer = 0;
 245
 246                 glItem.__init__(self, name, p_name, context)
 247                 return
 248
 249
 250         def is_variable_length_array(self):
 251                 """Determine if a parameter is a variable length array.
 252
 253                 A parameter is considered to be a variable length array if
 254                 its size depends on the value of another parameter that is
 255                 an enumerant.  The params parameter to glTexEnviv is an
 256                 example of a variable length array parameter.  Arrays whose
 257                 size depends on a count variable, such as the lists parameter
 258                 to glCallLists, are not variable length arrays in this
 259                 sense."""
 260
 261                 return self.p_count_parameters or self.counter or self.width
 262
 263
 264         def is_array(self):
 265                 return self.is_pointer
 266
 267
 268         def count_string(self):
 269                 """Return a string representing the number of items
 270
 271                 Returns a string representing the number of items in a
 272                 parameter.  For scalar types this will always be "1".  For
 273                 vector types, it will depend on whether or not it is a
 274                 fixed length vector (like the parameter of glVertex3fv),
 275                 a counted length (like the vector parameter of
 276                 glDeleteTextures), or a general variable length vector."""
 277
 278                 if self.is_array():
 279                         if self.p_count_parameters != None:
 280                                 return "compsize"
 281                         elif self.counter != None:
 282                                 return self.counter
 283                         else:
 284                                 return str(self.p_count)
 285                 else:
 286                         return "1"
 287
 288
 289         def size(self):
 290                 if self.p_count_parameters or self.counter or self.width or self.is_output:
 291                         return 0
 292                 elif self.p_count == 0:
 293                         return self.p_type.size
 294                 else:
 295                         return self.p_type.size * self.p_count
 296
 297         def size_string(self):
 298                 s = self.size()
 299                 if s == 0:
 300                         a_prod = "compsize"
 301                         b_prod = self.p_type.size
 302
 303                         if self.p_count_parameters == None and self.counter != None:
 304                                 a_prod = self.counter
 305                         elif self.p_count_parameters != None and self.counter == None:
 306                                 pass
 307                         elif self.p_count_parameters != None and self.counter != None:
 308                                 b_prod = self.counter
 309                         elif self.width:
 310                                 return "compsize"
 311                         else:
 312                                 raise RuntimeError("Parameter '%s' to function '%s' has size 0." % (self.name, self.context.name))
 313
 314                         return "(%s * %s)" % (a_prod, b_prod)
 315                 else:
 316                         return str(s)
 317
 318
 319 class glParameterIterator:
 320         """Class to iterate over a list of glParameters.
 321
 322         Objects of this class are returned by the parameterIterator method of
 323         the glFunction class.  They are used to iterate over the list of
 324         parameters to the function."""
 325
 326         def __init__(self, data):
 327                 self.data = data
 328                 self.index = 0
 329
 330         def __iter__(self):
 331                 return self
 332
 333         def next(self):
 334                 if self.index == len( self.data ):
 335                         raise StopIteration
 336                 i = self.index
 337                 self.index += 1
 338                 return self.data[i]
 339
 340
 341 class glFunction( glItem ):
 342         real_name = ""
 343         fn_alias = None
 344         fn_offset = -1
 345         fn_return_type = "void"
 346         fn_parameters = []
 347
 348         def __init__(self, context, name, attrs):
 349                 self.fn_alias = attrs.get('alias', None)
 350                 self.fn_parameters = []
 351                 self.image = None
 352
 353                 temp = attrs.get('offset', None)
 354                 if temp == None or temp == "?":
 355                         self.fn_offset = -1
 356                 else:
 357                         self.fn_offset = int(temp)
 358
 359                 fn_name = attrs.get('name', None)
 360                 if self.fn_alias != None:
 361                         self.real_name = self.fn_alias
 362                 else:
 363                         self.real_name = fn_name
 364
 365                 glItem.__init__(self, name, fn_name, context)
 366                 return
 367
 368
 369         def parameterIterator(self):
 370                 return glParameterIterator(self.fn_parameters)
 371
 372
 373         def startElement(self, name, attrs):
 374                 if name == "param":
 375                         try:
 376                                 self.context.factory.create(self, name, attrs)
 377                         except RuntimeError:
 378                                 print "Error with parameter '%s' in function '%s'." \
 379                                         % (attrs.get('name','(unknown)'), self.name)
 380                                 raise
 381                 elif name == "return":
 382                         self.set_return_type(attrs.get('type', None))
 383
 384
 385         def append(self, tag_name, p):
 386                 if tag_name != "param":
 387                         raise RuntimeError("Trying to append '%s' to parameter list of function '%s'." % (tag_name, self.name))
 388
 389                 if p.width:
 390                         self.image = p
 391
 392                 self.fn_parameters.append(p)
 393
 394
 395         def set_return_type(self, t):
 396                 self.fn_return_type = t
 397
 398
 399         def get_parameter_string(self):
 400                 arg_string = ""
 401                 comma = ""
 402                 for p in glFunction.parameterIterator(self):
 403                         arg_string = arg_string + comma + p.p_type_string + " " + p.name
 404                         comma = ", "
 405
 406                 if arg_string == "":
 407                         arg_string = "void"
 408
 409                 return arg_string
 410
 411
 412 class glItemFactory:
 413         """Factory to create objects derived from glItem."""
 414
 415         def create(self, context, name, attrs):
 416                 if name == "function":
 417                         return glFunction(context, name, attrs)
 418                 elif name == "type":
 419                         return glType(context, name, attrs)
 420                 elif name == "enum":
 421                         return glEnum(context, name, attrs)
 422                 elif name == "param":
 423                         return glParameter(context, name, attrs)
 424                 else:
 425                         return None
 426
 427
 428 class glFunctionIterator:
 429         """Class to iterate over a list of glFunctions
 430
 431         Objects of this classare returned by
 432         FilterGLAPISpecBase::functionIterator.  This default version
 433         iterates over the functions in order of dispatch table offset.  All
 434         of the "true" functions are iterated first, followed by the alias
 435         functions."""
 436
 437         def __init__(self, context):
 438                 self.context = context
 439                 self.keys = context.functions.keys()
 440                 self.keys.sort()
 441
 442                 self.prevk = -1
 443                 self.direction = 1
 444
 445                 for self.index in range(0, len(self.keys)):
 446                         if self.keys[ self.index ] >= 0: break
 447
 448                 if self.index == len(self.keys):
 449                         self.direction = -1
 450                         self.index -= 1
 451
 452                 self.split = self.index - 1
 453                 return
 454
 455
 456         def __iter__(self):
 457                 return self
 458
 459
 460         def next(self):
 461                 if self.index < 0:
 462                         raise StopIteration
 463
 464                 k = self.keys[ self.index ]
 465
 466                 #if self.context.functions[k].fn_alias == None:
 467                 #       if k != self.prevk + 1:
 468                 #               print 'Missing offset %d' % (prevk)
 469                 #       self.prevk = int(k)
 470
 471                 self.index += self.direction
 472
 473                 if self.index == len(self.keys):
 474                         self.index = self.split
 475                         self.direction = -1
 476
 477                 return self.context.functions[k]
 478
 479
 480 class FilterGLAPISpecBase(saxutils.XMLFilterBase):
 481         name = "a"
 482         license = "The license for this file is unspecified."
 483         functions = {}
 484         next_alias = -2
 485         types = {}
 486         xref = {}
 487         current_object = None
 488         factory = None
 489         current_category = ""
 490
 491         def __init__(self):
 492                 saxutils.XMLFilterBase.__init__(self)
 493                 self.functions = {}
 494                 self.types = {}
 495                 self.xref = {}
 496                 self.factory = glItemFactory()
 497                 self.header_tag = None
 498
 499
 500         def find_type(self,type_name):
 501                 for t in self.types:
 502                         if re.compile(t).search(type_name):
 503                                 return self.types[t]
 504                 print "Unable to find base type matching \"%s\"." % (type_name)
 505                 return None
 506
 507
 508         def find_function(self,function_name):
 509                 index = self.xref[function_name]
 510                 return self.functions[index]
 511
 512
 513         def functionIterator(self):
 514                 return glFunctionIterator(self)
 515
 516
 517         def printFunctions(self):
 518                 for f in self.functionIterator():
 519                         self.printFunction(f)
 520                 return
 521
 522
 523         def printHeader(self):
 524                 """Print the header associated with all files and call the printRealHeader method."""
 525
 526                 print '/* DO NOT EDIT - This file generated automatically by %s script */' \
 527                         % (self.name)
 528                 print ''
 529                 print '/*'
 530                 print ' * ' + self.license.replace('\n', '\n * ')
 531                 print ' */'
 532                 print ''
 533                 if self.header_tag:
 534                     print '#if !defined( %s )' % (self.header_tag)
 535                     print '#  define %s' % (self.header_tag)
 536                     print ''
 537                 self.printRealHeader();
 538                 return
 539
 540
 541         def printFooter(self):
 542                 """Print the header associated with all files and call the printRealFooter method."""
 543
 544                 self.printFunctions()
 545                 self.printRealFooter()
 546                 if self.header_tag:
 547                     print ''
 548                     print '#endif /* !defined( %s ) */' % (self.header_tag)
 549
 550
 551         def get_category_define(self):
 552                 """Convert the category name to the #define that would be found in glext.h"""
 553
 554                 if re.compile("[1-9][0-9]*[.][0-9]+").match(self.current_category):
 555                         s = self.current_category
 556                         return "GL_VERSION_" + s.replace(".", "_")
 557                 else:
 558                         return self.current_category
 559
 560
 561         def append(self, object_type, obj):
 562                 if object_type == "function":
 563                         # If the function is not an alias and has a negative
 564                         # offset, then we do not need to track it.  These are
 565                         # functions that don't have an assigned offset
 566
 567                         if obj.fn_offset >= 0 or obj.fn_alias != None:
 568                                 if obj.fn_offset >= 0:
 569                                         index = obj.fn_offset
 570                                 else:
 571                                         index = self.next_alias
 572                                         self.next_alias -= 1
 573
 574                                 self.functions[index] = obj
 575                                 self.xref[obj.name] = index
 576                 elif object_type == "type":
 577                         self.types[obj.name] = obj
 578
 579                 return
 580
 581
 582         def startElement(self, name, attrs):
 583                 """Start a new element in the XML stream.
 584
 585                 Starts a new element.  There are three types of elements that
 586                 are specially handled by this function.  When a "category"
 587                 element is encountered, the name of the category is saved.
 588                 If an element is encountered and no API object is
 589                 in-progress, a new object is created using the API factory.
 590                 Any future elements, until that API object is closed, are
 591                 passed to the current objects startElement method.
 592
 593                 This paradigm was chosen becuase it allows subclasses of the
 594                 basic API types (i.e., glFunction, glEnum, etc.) to handle
 595                 additional XML data, GLX protocol information,  that the base
 596                 classes do not know about."""
 597
 598                 if self.current_object != None:
 599                         self.current_object.startElement(name, attrs)
 600                 elif name == "category":
 601                         self.current_category = attrs.get('name', "")
 602                 else:
 603                         self.current_object = self.factory.create(self, name, attrs)
 604                 return
 605
 606
 607         def endElement(self, name):
 608                 if self.current_object != None:
 609                         if self.current_object.endElement(name):
 610                                 self.current_object = None
 611                 return
 612
 613
 614         def printFunction(self,offset):
 615                 """Print a single function.
 616
 617                 In the base class, this function is empty.  All derived
 618                 classes should over-ride this function."""
 619                 return
 620
 621
 622         def printRealHeader(self):
 623                 """Print the "real" header for the created file.
 624
 625                 In the base class, this function is empty.  All derived
 626                 classes should over-ride this function."""
 627                 return
 628
 629
 630         def printRealFooter(self):
 631                 """Print the "real" footer for the created file.
 632
 633                 In the base class, this function is empty.  All derived
 634                 classes should over-ride this function."""
 635                 return