Add a "count" attribute to "enums" elements to set the default count

used for "size" sub-elements.  In the future the "count" attribute may
be removed completely from "size" sub-elements, so gl_API.xml was also
updated.

Support was added for a (currently unused) "mode" attribute for "size"
elements.  Basically, functions are marked as either "get" or "set".  This
will be used in generating size functions for the server-side (where the
"get" functions have to know how much data to return).  It could also be
used to help generate code for src/mesa/main/get.c.

src/mesa/glapi/glX_XML.py

@@ -244,7 +244,7 @@ class glXEnum(gl_XML.glEnum):
 
 	def startElement(self, name, attrs):
 		if name == "size":
-			[n, c] = self.process_attributes(attrs)
+			[n, c, mode] = self.process_attributes(attrs)
 
 			if not self.context.glx_enum_functions.has_key( n ):
 				f = glXEnumFunction( n )

src/mesa/glapi/gl_XML.py

@@ -90,17 +90,40 @@ class glEnum( glItem ):
 		enum_name = "GL_" + attrs.get('name', None)
 		glItem.__init__(self, name, enum_name, context)
 
+		temp = attrs.get('count', None)
+		if temp == None:
+			self.default_count = 0
+		else:
+			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.default_count = c
+		return
+
 
 	def process_attributes(self, attrs):
 		name = attrs.get('name', None)
 
 		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))
+		if temp == None:
+			c = self.default_count
+		else:
+			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))
 
-		return [name, c]
+		mode_str = attrs.get('mode', "set")
+		if mode_str == "set":
+			mode = 1
+		elif mode_str == "get":
+			mode = 0
+		else:
+			raise RuntimeError("Invalid mode '%s' for function '%s' in enum '%s'." % (mode_str, self.context.name, self.name))
+
+		return [name, c, mode]
 
 
 class glType( glItem ):