[GX] Add 'fvar' table support

I might change the table format in the future, but it's functional now.

Doc/documentation.html

@@ -42,7 +42,7 @@ When using TTX from the command line there are a bunch of extra options, these a
 The following tables are currently supported:
 <BLOCKQUOTE><TT>
 <!-- begin table list -->
-BASE, CBDT, CBLC, CFF, COLR, CPAL, DSIG, EBDT, EBLC, FFTM, GDEF, GMAP, GPKG, GPOS, GSUB, JSTF, LTSH, MATH, META, OS/2, SING, SVG, TSI0, TSI1, TSI2, TSI3, TSI5, TSIB, TSID, TSIJ, TSIP, TSIS, TSIV, VDMX, VORG, cmap, cvt, feat, fpgm, gasp, glyf, hdmx, head, hhea, hmtx, kern, loca, maxp, name, post, prep, sbix, vhea and vmtx
+BASE, CBDT, CBLC, CFF, COLR, CPAL, DSIG, EBDT, EBLC, FFTM, GDEF, GMAP, GPKG, GPOS, GSUB, JSTF, LTSH, MATH, META, OS/2, SING, SVG, TSI0, TSI1, TSI2, TSI3, TSI5, TSIB, TSID, TSIJ, TSIP, TSIS, TSIV, VDMX, VORG, cmap, cvt, feat, fpgm, fvar, gasp, glyf, hdmx, head, hhea, hmtx, kern, loca, maxp, name, post, prep, sbix, vhea and vmtx
 <!-- end table list -->
 </TT></BLOCKQUOTE>
 Other tables are dumped as hexadecimal data.

Lib/fontTools/ttLib/tables/__init__.py

@@ -42,6 +42,7 @@ def _moduleFinderHint():
 	from . import _c_v_t
 	from . import _f_e_a_t
 	from . import _f_p_g_m
+	from . import _f_v_a_r
 	from . import _g_a_s_p
 	from . import _g_l_y_f
 	from . import _h_d_m_x

Lib/fontTools/ttLib/tables/otConverters.py

@@ -62,7 +62,7 @@ class BaseConverter(object):
 		self.tableClass = tableClass
 		self.isCount = name.endswith("Count")
 		self.isLookupType = name.endswith("LookupType")
-		self.isPropagated = name in ["ClassCount", "Class2Count", "FeatureTag", "SettingsCount"]
+		self.isPropagated = name in ["ClassCount", "Class2Count", "FeatureTag", "SettingsCount", "AxisCount"]
 	
 	def read(self, reader, font, tableDict):
 		"""Read a value from the reader."""
@@ -104,32 +104,6 @@ class ULong(IntValue):
 	def write(self, writer, font, tableDict, value, repeatIndex=None):
 		writer.writeULong(value)
 
-class Version(BaseConverter):
-	def read(self, reader, font, tableDict):
-		value = reader.readLong()
-		assert (value >> 16) == 1, "Unsupported version 0x%08x" % value
-		return  fi2fl(value, 16)
-	def write(self, writer, font, tableDict, value, repeatIndex=None):
-		if value < 0x10000:
-			value = fl2fi(value, 16)
-		value = int(round(value))
-		assert (value >> 16) == 1, "Unsupported version 0x%08x" % value
-		writer.writeLong(value)
-	def xmlRead(self, attrs, content, font):
-		value = attrs["value"]
-		value = float(int(value, 0)) if value.startswith("0") else float(value)
-		if value >= 0x10000:
-			value = fi2fl(value, 16)
-		return value
-	def xmlWrite(self, xmlWriter, font, value, name, attrs):
-		if value >= 0x10000:
-			value = fi2fl(value, 16)
-		if value % 1 != 0:
-			# Write as hex
-			value = "0x%08x" % fl2fi(value, 16)
-		xmlWriter.simpletag(name, attrs + [("value", value)])
-		xmlWriter.newline()
-
 class Short(IntValue):
 	def read(self, reader, font, tableDict):
 		return reader.readShort()
@@ -181,6 +155,41 @@ class DeciPoints(FloatValue):
 	def write(self, writer, font, tableDict, value, repeatIndex=None):
 		writer.writeUShort(int(round(value * 10)))
 
+class Fixed(FloatValue):
+	def read(self, reader, font, tableDict):
+		value = reader.readLong()
+		return  fi2fl(value, 16)
+	def write(self, writer, font, tableDict, value, repeatIndex=None):
+		value = fl2fi(value, 16)
+		writer.writeLong(value)
+
+class Version(BaseConverter):
+	def read(self, reader, font, tableDict):
+		value = reader.readLong()
+		assert (value >> 16) == 1, "Unsupported version 0x%08x" % value
+		return  fi2fl(value, 16)
+	def write(self, writer, font, tableDict, value, repeatIndex=None):
+		if value < 0x10000:
+			value = fl2fi(value, 16)
+		value = int(round(value))
+		assert (value >> 16) == 1, "Unsupported version 0x%08x" % value
+		writer.writeLong(value)
+	def xmlRead(self, attrs, content, font):
+		value = attrs["value"]
+		value = float(int(value, 0)) if value.startswith("0") else float(value)
+		if value >= 0x10000:
+			value = fi2fl(value, 16)
+		return value
+	def xmlWrite(self, xmlWriter, font, value, name, attrs):
+		if value >= 0x10000:
+			value = fi2fl(value, 16)
+		if value % 1 != 0:
+			# Write as hex
+			value = "0x%08x" % fl2fi(value, 16)
+		xmlWriter.simpletag(name, attrs + [("value", value)])
+		xmlWriter.newline()
+
+
 class Struct(BaseConverter):
 	
 	def read(self, reader, font, tableDict):
@@ -383,6 +392,7 @@ converterMapping = {
 	"Tag":         Tag,
 	"GlyphID":     GlyphID,
 	"DeciPoints":  DeciPoints,
+	"Fixed":       Fixed,
 	"struct":      Struct,
 	"Offset":      Table,
 	"LOffset":     LTable,

Lib/fontTools/ttLib/tables/otData.py

@@ -1017,4 +1017,39 @@ otData = [
 		('uint16', 'SettingNameID', None, None, 'The name table index for the setting name.'),
 	]),
 
+	##
+	## Apple TrueType GX tables
+	##
+
+	#
+	# fvar
+	#
+
+	('fvar', [
+		('Version', 'Version', None, None, 'Version of the fvar table-initially set to 0x00010000.'),
+		('uint16', 'OffsetToData', None, None, 'Set to 16.'),
+		('uint16', 'CountSizePairs', None, None, 'Set to 2.'),
+		('uint16', 'AxisCount', None, None, 'Number of style axes in this font.'),
+		('uint16', 'AxisSize', None, None, 'Set to 20.'),
+		('uint16', 'InstanceCount', None, None, 'Number of named instances in this font.'),
+		('uint16', 'InstanceSize', None, None, 'Number of bytes in each instance.'),
+		('VariationAxis', 'VariationAxis', 'AxisCount', 0, 'The variation axes array.'),
+		('NamedInstance', 'NamedInstance', 'InstanceCount', 0, 'The named instances array.'),
+	]),
+
+	('VariationAxis', [
+		('Tag', 'AxisTag', None, None, '4-byte AxisTag identifier'),
+		('Fixed', 'MinValue', None, None, 'The minimum style coordinate for the axis.'),
+		('Fixed', 'DefaultValue', None, None, 'The default style coordinate for the axis.'),
+		('Fixed', 'MaxValue', None, None, 'The maximum style coordinate for the axis.'),
+		('uint16', 'Flags', None, None, 'Set to zero.'),
+		('uint16', 'NameID', None, None, 'The name table index for the setting name.'),
+	]),
+
+	('NamedInstance', [
+		('uint16', 'NameID', None, None, 'The name table index for the instance name.'),
+		('uint16', 'Flags', None, None, 'Set to zero.'),
+		('Fixed', 'Coords', 'AxisCount', 0, 'The maximum style coordinate for the axis.'),
+	]),
+
 ]