summaryrefslogtreecommitdiff
path: root/src/mesa/glapi/glX_XML.py
blob: 53f89b31bd5ff94a2fcb092fb88ce09a1a7d9e79 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
#!/usr/bin/python2

# (C) Copyright IBM Corporation 2004, 2005
# All Rights Reserved.
#
# 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.
#
# Authors:
#    Ian Romanick <idr@us.ibm.com>

import gl_XML
import license
import sys, getopt, string


class glXItemFactory(gl_XML.glItemFactory):
	"""Factory to create GLX protocol oriented objects derived from glItem."""
    
	def create(self, context, name, attrs):
		if name == "function":
			return glXFunction(context, name, attrs)
		elif name == "enum":
			return glXEnum(context, name, attrs)
		elif name == "param":
			return glXParameter(context, name, attrs)
		else:
			return gl_XML.glItemFactory.create(self, context, name, attrs)

class glXEnumFunction:
	def __init__(self, name, context):
		self.name = name
		self.context = context
		self.mode = 0
		self.sig = None

		# "enums" is a set of lists.  The element in the set is the
		# value of the enum.  The list is the list of names for that
		# value.  For example, [0x8126] = {"POINT_SIZE_MIN",
		# "POINT_SIZE_MIN_ARB", "POINT_SIZE_MIN_EXT",
		# "POINT_SIZE_MIN_SGIS"}.

		self.enums = {}

		# "count" is indexed by count values.  Each element of count
		# is a list of index to "enums" that have that number of
		# associated data elements.  For example, [4] = 
		# {GL_AMBIENT, GL_DIFFUSE, GL_SPECULAR, GL_EMISSION,
		# GL_AMBIENT_AND_DIFFUSE} (the enum names are used here,
		# but the actual hexadecimal values would be in the array).

		self.count = {}


	def append(self, count, value, name):
		if self.enums.has_key( value ):
			self.enums[value].append(name)
		else:
			if not self.count.has_key(count):
				self.count[count] = []

			self.enums[value] = []
			self.enums[value].append(name)
			self.count[count].append(value)


	def signature( self ):
		if self.sig == None:
			self.sig = ""
			for i in self.count:
				self.count[i].sort()
				for e in self.count[i]:
					self.sig += "%04x,%u," % (e, i)
	
		return self.sig


	def set_mode( self, mode ):
		"""Mark an enum-function as a 'set' function."""

		self.mode = mode


	def is_set( self ):
		return self.mode


	def PrintUsingTable(self):
		"""Emit the body of the __gl*_size function using a pair
		of look-up tables and a mask.  The mask is calculated such
		that (e & mask) is unique for all the valid values of e for
		this function.  The result of (e & mask) is used as an index
		into the first look-up table.  If it matches e, then the
		same entry of the second table is returned.  Otherwise zero
		is returned.
		
		It seems like this should cause better code to be generated.
		However, on x86 at least, the resulting .o file is about 20%
		larger then the switch-statment version.  I am leaving this
		code in because the results may be different on other
		platforms (e.g., PowerPC or x86-64)."""

		return 0
		count = 0
		for a in self.enums:
			count += 1

		if self.count.has_key(-1):
			return 0

		# Determine if there is some mask M, such that M = (2^N) - 1,
		# that will generate unique values for all of the enums.

		mask = 0
		for i in [1, 2, 3, 4, 5, 6, 7, 8]:
			mask = (1 << i) - 1

			fail = 0;
			for a in self.enums:
				for b in self.enums:
					if a != b:
						if (a & mask) == (b & mask):
							fail = 1;

			if not fail:
				break;
			else:
				mask = 0

		if (mask != 0) and (mask < (2 * count)):
			masked_enums = {}
			masked_count = {}

			for i in range(0, mask + 1):
				masked_enums[i] = "0";
				masked_count[i] = 0;

			for c in self.count:
				for e in self.count[c]:
					i = e & mask
					masked_enums[i] = '0x%04x /* %s */' % (e, self.enums[e][0])
					masked_count[i] = c


			print '    static const GLushort a[%u] = {' % (mask + 1)
			for e in masked_enums:
				print '        %s, ' % (masked_enums[e])
			print '    };'

			print '    static const GLubyte b[%u] = {' % (mask + 1)
			for c in masked_count:
				print '        %u, ' % (masked_count[c])
			print '    };'

			print '    const unsigned idx = (e & 0x%02xU);' % (mask)
			print ''
			print '    return (e == a[idx]) ? (GLint) b[idx] : 0;'
			return 1;
		else:
			return 0;

	def PrintUsingSwitch(self, name):
		"""Emit the body of the __gl*_size function using a 
		switch-statement."""

		print '    switch( e ) {'

		for c in self.count:
			for e in self.count[c]:
				first = 1

				# There may be multiple enums with the same
				# value.  This happens has extensions are
				# promoted from vendor-specific or EXT to
				# ARB and to the core.  Emit the first one as
				# a case label, and emit the others as
				# commented-out case labels.

				for j in self.enums[e]:
					if first:
						print '        case %s:' % (j)
						first = 0
					else:
						print '/*      case %s:*/' % (j)
					
			if c == -1:
				print '            return __gl%s_variable_size( e );' % (name)
			else:
				print '            return %u;' % (c)
					
		print '        default: return 0;'
		print '    }'


	def Print(self, name):
		print 'INTERNAL PURE FASTCALL GLint'
		print '__gl%s_size( GLenum e )' % (name)
		print '{'

		if not self.PrintUsingTable():
			self.PrintUsingSwitch(name)

		print '}'
		print ''



class glXEnum(gl_XML.glEnum):
	def __init__(self, context, name, attrs):
		gl_XML.glEnum.__init__(self, context, name, attrs)


	def startElementNS(self, name, qname, attrs):
		[uri, true_name] = name
		if true_name == "size":
			[temp_n, c, mode] = self.process_attributes(attrs)

			if temp_n == "Get":
				names = ["GetIntegerv", "GetBooleanv", "GetFloatv", "GetDoublev" ]
			else:
				names = [ temp_n ]

			for n in names:
				if not self.context.glx_enum_functions.has_key( n ):
					f = self.context.createEnumFunction( n )
					f.set_mode( mode )
					self.context.glx_enum_functions[ f.name ] = f

				self.context.glx_enum_functions[ n ].append( c, self.value, self.name )
		else:
			gl_XML.glEnum.startElementNS(self, name, qname, attrs)
		return


class glXParameter(gl_XML.glParameter):
	def __init__(self, context, name, attrs):
		self.order = 1;
		gl_XML.glParameter.__init__(self, context, name, attrs);


class glXParameterIterator:
	"""Class to iterate over a list of glXParameters.

	Objects of this class are returned by the parameterIterator method of
	the glXFunction class.  They are used to iterate over the list of
	parameters to the function."""

	def __init__(self, data, skip_output, max_order):
		self.data = data
		self.index = 0
		self.order = 0
		self.skip_output = skip_output
		self.max_order = max_order

	def __iter__(self):
		return self

	def next(self):
		if len( self.data ) == 0:
			raise StopIteration

		while 1:
			if self.index == len( self.data ):
				if self.order == self.max_order:
					raise StopIteration
				else:
					self.order += 1
					self.index = 0

			i = self.index
			self.index += 1

			if self.data[i].order == self.order and not (self.data[i].is_output and self.skip_output):
				return self.data[i]


class glXFunction(gl_XML.glFunction):
	glx_rop = 0
	glx_sop = 0
	glx_vendorpriv = 0

	# If this is set to true, it means that GLdouble parameters should be
	# written to the GLX protocol packet in the order they appear in the
	# prototype.  This is different from the "classic" ordering.  In the
	# classic ordering GLdoubles are written to the protocol packet first,
	# followed by non-doubles.  NV_vertex_program was the first extension
	# to break with this tradition.

	glx_doubles_in_order = 0

	vectorequiv = None
	can_be_large = 0

	def __init__(self, context, name, attrs):
		self.vectorequiv = attrs.get((None, 'vectorequiv'), None)
		self.counter = None
		self.output = None
		self.can_be_large = 0
		self.reply_always_array = 0
		self.dimensions_in_reply = 0
		self.img_reset = None

		self.server_handcode = 0
		self.client_handcode = 0
		self.ignore = 0

		gl_XML.glFunction.__init__(self, context, name, attrs)
		return


	def parameterIterator(self, skip_output, max_order):
		return glXParameterIterator(self.fn_parameters, skip_output, max_order)

		
	def startElementNS(self, name, qname, attrs):
		"""Process elements within a function that are specific to GLX."""

		[uri, true_name] = name
		if true_name == "glx":
			self.glx_rop = int(attrs.get((None, 'rop'), "0"))
			self.glx_sop = int(attrs.get((None, 'sop'), "0"))
			self.glx_vendorpriv = int(attrs.get((None, 'vendorpriv'), "0"))
			self.img_reset = attrs.get((None, 'img_reset'), None)

			# The 'handcode' attribute can be one of 'true',
			# 'false', 'client', or 'server'.

			handcode = attrs.get((None, 'handcode'), "false")
			if handcode == "false":
				self.server_handcode = 0
				self.client_handcode = 0
			elif handcode == "true":
				self.server_handcode = 1
				self.client_handcode = 1
			elif handcode == "client":
				self.server_handcode = 0
				self.client_handcode = 1
			elif handcode == "server":
				self.server_handcode = 1
				self.client_handcode = 0
			else:
				raise RuntimeError('Invalid handcode mode "%s" in function "%s".' % (handcode, self.name))

			self.ignore               = gl_XML.is_attr_true( attrs, 'ignore' )
			self.can_be_large         = gl_XML.is_attr_true( attrs, 'large' )
			self.glx_doubles_in_order = gl_XML.is_attr_true( attrs, 'doubles_in_order' )
			self.reply_always_array   = gl_XML.is_attr_true( attrs, 'always_array' )
			self.dimensions_in_reply  = gl_XML.is_attr_true( attrs, 'dimensions_in_reply' )
		else:
			gl_XML.glFunction.startElementNS(self, name, qname, attrs)


	def endElementNS(self, name, qname):
		[uri, true_name] = name
		if true_name == "function":
			# Mark any function that does not have GLX protocol
			# defined as "ignore".  This prevents bad things from
			# happening when people add new functions to the GL
			# API XML without adding any GLX section.
			#
			# This will also mark functions that don't have a
			# dispatch offset at ignored.

			if (self.fn_offset == -1 and not self.fn_alias) or not (self.client_handcode or self.server_handcode or self.glx_rop or self.glx_sop or self.glx_vendorpriv or self.vectorequiv or self.fn_alias):
				#if not self.ignore:
				#	if self.fn_offset == -1:
				#		print '/* %s ignored becuase no offset assigned. */' % (self.name)
				#	else:
				#		print '/* %s ignored becuase no GLX opcode assigned. */' % (self.name)

				self.ignore = 1

		return gl_XML.glFunction.endElementNS(self, name, qname)


	def append(self, tag_name, p):
		gl_XML.glFunction.append(self, tag_name, p)

		if p.is_variable_length_array():
			p.order = 2;
		elif not self.glx_doubles_in_order and p.p_type.size == 8:
			p.order = 0;

		if p.is_counter:
			self.counter = p.name
			
		if p.is_output:
			self.output = p

		return


	def variable_length_parameter(self):
		if len(self.variable_length_parameters):
			return self.variable_length_parameters[0]

		return None


	def output_parameter(self):
		for param in self.fn_parameters:
			if param.is_output:
				return param

		return None


	def offset_of_first_parameter(self):
		"""Get the offset of the first parameter in the command.

		Gets the offset of the first function parameter in the GLX
		command packet.  This byte offset is measured from the end
		of the Render / RenderLarge header.  The offset for all non-
		pixel commends is zero.  The offset for pixel commands depends
		on the number of dimensions of the pixel data."""

		if self.image and not self.image.is_output:
			[dim, junk, junk, junk, junk] = self.dimensions()

			# The base size is the size of the pixel pack info
			# header used by images with the specified number
			# of dimensions.

			if dim <=  2:
				return 20
			elif dim <= 4:
				return 36
			else:
				raise RuntimeError('Invalid number of dimensions %u for parameter "%s" in function "%s".' % (dim, self.image.name, self.name))
		else:
			return 0


	def command_fixed_length(self):
		"""Return the length, in bytes as an integer, of the
		fixed-size portion of the command."""

		size = self.offset_of_first_parameter()

		for p in gl_XML.glFunction.parameterIterator(self):
			if not p.is_output and p.name != self.img_reset:
				size += p.size()
				if self.pad_after(p):
					size += 4

		if self.image and (self.image.img_null_flag or self.image.is_output):
			size += 4

		return size


	def command_variable_length(self):
		"""Return the length, as a string, of the variable-sized
		portion of the command."""

		size_string = ""
		for p in gl_XML.glFunction.parameterIterator(self):
			if (not p.is_output) and (p.size() == 0):
				size_string = size_string + " + __GLX_PAD(%s)" % (p.size_string())

		return size_string


	def command_length(self):
		size = self.command_fixed_length()

		if self.glx_rop != 0:
			size += 4

		size = ((size + 3) & ~3)
		return "%u%s" % (size, self.command_variable_length())


	def opcode_real_value(self):
		"""Get the true numeric value of the GLX opcode
		
		Behaves similarly to opcode_value, except for
		X_GLXVendorPrivate and X_GLXVendorPrivateWithReply commands.
		In these cases the value for the GLX opcode field (i.e.,
		16 for X_GLXVendorPrivate or 17 for
		X_GLXVendorPrivateWithReply) is returned.  For other 'single'
		commands, the opcode for the command (e.g., 101 for
		X_GLsop_NewList) is returned."""

		if self.glx_vendorpriv != 0:
			if self.needs_reply():
				return 17
			else:
				return 16
		else:
			return self.opcode_value()

	def opcode_value(self):
		"""Get the unique protocol opcode for the glXFunction"""

		if self.glx_rop != 0:
			return self.glx_rop
		elif self.glx_sop != 0:
			return self.glx_sop
		elif self.glx_vendorpriv != 0:
			return self.glx_vendorpriv
		else:
			return -1
	
	def opcode_rop_basename(self):
		"""Return either the name to be used for GLX protocol enum.
		
		Returns either the name of the function or the name of the
		name of the equivalent vector (e.g., glVertex3fv for
		glVertex3f) function."""

		if self.vectorequiv == None:
			return self.name
		else:
			return self.vectorequiv

	def opcode_name(self):
		"""Get the unique protocol enum name for the glXFunction"""

		if self.glx_rop != 0:
			return "X_GLrop_%s" % (self.opcode_rop_basename())
		elif self.glx_sop != 0:
			return "X_GLsop_%s" % (self.name)
		elif self.glx_vendorpriv != 0:
			return "X_GLvop_%s" % (self.name)
		else:
			raise RuntimeError('Function "%s" has no opcode.' % (self.name))


	def opcode_real_name(self):
		"""Get the true protocol enum name for the GLX opcode
		
		Behaves similarly to opcode_name, except for
		X_GLXVendorPrivate and X_GLXVendorPrivateWithReply commands.
		In these cases the string 'X_GLXVendorPrivate' or
		'X_GLXVendorPrivateWithReply' is returned.  For other
		single or render commands 'X_GLsop' or 'X_GLrop' plus the
		name of the function returned."""

		if self.glx_vendorpriv != 0:
			if self.needs_reply():
				return "X_GLXVendorPrivateWithReply"
			else:
				return "X_GLXVendorPrivate"
		else:
			return self.opcode_name()


	def return_string(self):
		if self.fn_return_type != 'void':
			return "return retval;"
		else:
			return "return;"


	def needs_reply(self):
		return self.fn_return_type != 'void' or self.output != None


	def dimensions(self):
		"""Determine the dimensions of an image.
		
		Returns a tuple representing the number of dimensions and the
		string name of each of the dimensions of an image,  If the
		function is not a pixel function, the number of dimensions
		will be zero."""

		if not self.image:
			return [0, "0", "0", "0", "0"]
		else:
			dim = 1
			w = self.image.width

			if self.image.height:
				dim = 2
				h = self.image.height
			else:
				h = "1"

			if self.image.depth:
				dim = 3
				d = self.image.depth
			else:
				d = "1"
			
			if self.image.extent:
				dim = 4
				e = self.image.extent
			else:
				e = "1"

			return [dim, w, h, d, e]


	def pad_after(self, p):
		"""Returns the name of the field inserted after the
		specified field to pad out the command header."""

		if self.image and self.image.img_pad_dimensions:
			if not self.image.height:
				if p.name == self.image.width:
					return "height"
				elif p.name == self.image.img_xoff:
					return "yoffset"
			elif not self.image.extent:
				if p.name == self.image.depth:
					# Should this be "size4d"?
					return "extent"
				elif p.name == self.image.img_zoff:
					return "woffset"
		return None


class glXFunctionIterator(gl_XML.glFunctionIterator):
	"""Class to iterate over a list of glXFunctions"""

	def __init__(self, context):
		self.context = context
		self.keys = context.functions.keys()
		self.keys.sort()

		for self.index in range(0, len(self.keys)):
			if self.keys[ self.index ] >= 0: break

		return


	def next(self):
		if self.index == len(self.keys):
			raise StopIteration

		f = self.context.functions[ self.keys[ self.index ] ]
		self.index += 1

		if f.ignore:
			return self.next()
		else:
			return f


class GlxProto(gl_XML.FilterGLAPISpecBase):
	name = "glX_proto_send.py (from Mesa)"

	def __init__(self):
		gl_XML.FilterGLAPISpecBase.__init__(self)
		self.factory = glXItemFactory()
		self.glx_enum_functions = {}


	def endElementNS(self, name, qname):
		[uri, true_name] = name
		if true_name == 'OpenGLAPI':
			# Once all the parsing is done, we have to go back and
			# fix-up some cross references between different
			# functions.

			for k in self.functions:
				f = self.functions[k]
				if f.vectorequiv != None:
					equiv = self.find_function(f.vectorequiv)
					if equiv != None:
						f.glx_doubles_in_order = equiv.glx_doubles_in_order
						f.glx_rop = equiv.glx_rop
					else:
						raise RuntimeError("Could not find the vector equiv. function %s for %s!" % (f.name, f.vectorequiv))
		else:
			gl_XML.FilterGLAPISpecBase.endElementNS(self, name, qname)
		return


	def createEnumFunction(self, n):
		return glXEnumFunction(n, self)


	def functionIterator(self):
		return glXFunctionIterator(self)

	
	def size_call(self, func):
		"""Create C code to calculate 'compsize'.

		Creates code to calculate 'compsize'.  If the function does
		not need 'compsize' to be calculated, None will be
		returned."""

		if not func.image and not func.count_parameter_list:
			return None

		if not func.image:
			parameters = string.join( func.count_parameter_list, "," )
			compsize = "__gl%s_size(%s)" % (func.name, parameters)
		else:
			[dim, w, h, d, junk] = func.dimensions()

			compsize = '__glImageSize(%s, %s, %s, %s, %s, %s)' % (w, h, d, func.image.img_format, func.image.img_type, func.image.img_target)
			if not func.image.img_send_null:
				compsize = '(%s != NULL) ? %s : 0' % (func.image.name, compsize)

		return compsize