1 files changed, 466 insertions, 0 deletions
diff --git a/src/mesa/glapi/glX_XML.py b/src/mesa/glapi/glX_XML.py
new file mode 100644
index 00000000000..44f945a9ee4
--- /dev/null
+++ b/src/mesa/glapi/glX_XML.py
@@ -0,0 +1,466 @@
+#!/usr/bin/python2
+
+# (C) Copyright IBM Corporation 2004
+# 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 <[email protected]>
+
+from xml.sax import saxutils
+from xml.sax import make_parser
+from xml.sax.handler import feature_namespaces
+
+import gl_XML
+import license
+import sys, getopt
+
+
+def printPure():
+	print """#  if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#    define PURE __attribute__((pure))
+#  else
+#    define PURE
+#  endif"""
+
+def printFastcall():
+	print """#  if defined(__i386__) && defined(__GNUC__)
+#    define FASTCALL __attribute__((fastcall))
+#  else
+#    define FASTCALL
+#  endif"""
+
+def printVisibility(S, s):
+	print """#  if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
+#    define %s  __attribute__((visibility("%s")))
+#  else
+#    define %s
+#  endif""" % (S, s, S)
+
+def printNoinline():
+	print """#  if defined(__GNUC__)
+#    define NOINLINE __attribute__((noinline))
+#  else
+#    define NOINLINE
+#  endif"""
+
+
+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):
+		self.name = name
+		
+		# "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 ):
+		sig = ""
+		for i in self.count:
+			for e in self.count[i]:
+				sig += "%04x,%u," % (e, i)
+	
+		return sig;
+
+
+	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
+
+		# 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):
+		"""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)
+					
+			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()
+
+		print '}'
+		print ''
+
+
+
+class glXEnum(gl_XML.glEnum):
+	def __init__(self, context, name, attrs):
+		gl_XML.glEnum.__init__(self, context, name, attrs)
+		self.glx_functions = []
+
+	def startElement(self, name, attrs):
+		if name == "size":
+			n = attrs.get('name', None)
+			if not self.context.glx_enum_functions.has_key( n ):
+				f = glXEnumFunction( n )
+				self.context.glx_enum_functions[ f.name ] = f
+
+			temp = attrs.get('count', None)
+			try:
+				c = int(temp)
+			except Exception,e:
+				raise RuntimeError('Invalid count value "%s" for enum "%s" in function "%s" when an integer was expected.' % (temp, self.name, n))
+
+			self.context.glx_enum_functions[ n ].append( c, self.value, self.name )
+		else:
+			gl_XML.glEnum.startElement(self, context, name, 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 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
+	handcode = 0
+	ignore = 0
+	can_be_large = 0
+
+	def __init__(self, context, name, attrs):
+		self.vectorequiv = attrs.get('vectorequiv', None)
+		self.count_parameters = None
+		self.counter = None
+		self.output = None
+		self.can_be_large = 0
+		self.reply_always_array = 0
+
+		gl_XML.glFunction.__init__(self, context, name, attrs)
+		return
+
+	def startElement(self, name, attrs):
+		"""Process elements within a function that are specific to GLX."""
+
+		if name == "glx":
+			self.glx_rop = int(attrs.get('rop', "0"))
+			self.glx_sop = int(attrs.get('sop', "0"))
+			self.glx_vendorpriv = int(attrs.get('vendorpriv', "0"))
+
+			if attrs.get('handcode', "false") == "true":
+				self.handcode = 1
+			else:
+				self.handcode = 0
+
+			if attrs.get('ignore', "false") == "true":
+				self.ignore = 1
+			else:
+				self.ignore = 0
+
+			if attrs.get('large', "false") == "true":
+				self.can_be_large = 1
+			else:
+				self.can_be_large = 0
+
+			if attrs.get('doubles_in_order', "false") == "true":
+				self.glx_doubles_in_order = 1
+			else:
+				self.glx_doubles_in_order = 0
+
+			if attrs.get('always_array', "false") == "true":
+				self.reply_always_array = 1
+			else:
+				self.reply_always_array = 0
+
+		else:
+			gl_XML.glFunction.startElement(self, name, attrs)
+
+
+	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.p_count_parameters != None:
+			self.count_parameters = p.p_count_parameters
+		
+		if p.is_counter:
+			self.counter = p.name
+			
+		if p.is_output:
+			self.output = p
+
+		return
+
+	def variable_length_parameter(self):
+		for param in self.fn_parameters:
+			if param.is_variable_length_array():
+				return param
+			
+		return None
+
+
+	def command_payload_length(self):
+		size = 0
+		size_string = ""
+		for p in self:
+			if p.is_output: continue
+			temp = p.size_string()
+			try:
+				s = int(temp)
+				size += s
+			except Exception,e:
+				size_string = size_string + " + __GLX_PAD(%s)" % (temp)
+
+		return [size, size_string]
+
+	def command_length(self):
+		[size, size_string] = self.command_payload_length()
+
+		if self.glx_rop != 0:
+			size += 4
+
+		size = ((size + 3) & ~3)
+		return "%u%s" % (size, size_string)
+
+
+	def opcode_real_value(self):
+		if self.glx_vendorpriv != 0:
+			if self.needs_reply():
+				return 17
+			else:
+				return 16
+		else:
+			return self.opcode_value()
+
+	def opcode_value(self):
+		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):
+		if self.vectorequiv == None:
+			return self.name
+		else:
+			return self.vectorequiv
+
+	def opcode_name(self):
+		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:
+			return "ERROR"
+
+	def opcode_real_name(self):
+		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
+
+
+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 endElement(self, name):
+		if 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.endElement(self, name)
+		return