Add test to expose missed otRound + fix

Lib/fontTools/colorLib/table_builder.py

@@ -19,7 +19,10 @@ from fontTools.ttLib.tables.otConverters import (
     UShort,
     VarInt16,
     VarUInt16,
+    IntValue,
+    FloatValue,
 )
+from fontTools.misc.fixedTools import otRound
 
 
 class BuildCallback(enum.Enum):
@@ -96,7 +99,6 @@ class TableBuilder:
     def _convert(self, dest, field, converter, value):
         tupleClass = getattr(converter, "tupleClass", None)
         enumClass = getattr(converter, "enumClass", None)
-        simpleValueClass = getattr(converter, "valueClass", None)
 
         if tupleClass:
             value = convertTupleClass(tupleClass, value)
@@ -112,8 +114,10 @@ class TableBuilder:
             else:
                 value = enumClass(value)
 
-        elif simpleValueClass:
+        elif isinstance(converter, IntValue):
-            value = simpleValueClass(value)
+            value = otRound(value)
+        elif isinstance(converter, FloatValue):
+            value = float(value)
 
         elif isinstance(converter, Struct):
             if converter.repeat:

Lib/fontTools/ttLib/tables/otConverters.py

@@ -216,8 +216,6 @@ class SimpleValue(BaseConverter):
 		return self.fromString(attrs["value"])
 
 class IntValue(SimpleValue):
-	valueClass = int
-
 	@staticmethod
 	def fromString(value):
 		return int(value, 0)
@@ -297,7 +295,6 @@ class Tag(SimpleValue):
 		writer.writeTag(value)
 
 class GlyphID(SimpleValue):
-	valueClass = str
 	staticSize = 2
 	typecode = "H"
 	def readArray(self, reader, font, tableDict, count):
@@ -337,7 +334,6 @@ class NameID(UShort):
 
 
 class FloatValue(SimpleValue):
-	valueClass = float
 	@staticmethod
 	def fromString(value):
 		return float(value)

Tests/colorLib/table_builder_test.py

@@ -0,0 +1,15 @@
+from fontTools.ttLib.tables import otTables  # trigger setup to occur
+from fontTools.ttLib.tables.otConverters import UShort
+from fontTools.colorLib.table_builder import TableBuilder
+import pytest
+
+
+class WriteMe:
+    value = None
+
+
+def test_intValue_otRound():
+    dest = WriteMe()
+    converter = UShort("value", None, None)
+    TableBuilder()._convert(dest, "value", converter, 85.6)
+    assert dest.value == 86, "Should have used otRound"