Merge pull request #3506 from fonttools/cff2-instancing

[instancer] CFF2 instancing

Lib/fontTools/cffLib/CFF2ToCFF.py

@@ -0,0 +1,165 @@
+"""CFF2 to CFF converter."""
+
+from fontTools.ttLib import TTFont, newTable
+from fontTools.misc.cliTools import makeOutputFileName
+from fontTools.cffLib import TopDictIndex, buildOrder, topDictOperators
+from .width import optimizeWidths
+from collections import defaultdict
+import logging
+
+
+__all__ = ["convertCFF2ToCFF", "main"]
+
+
+log = logging.getLogger("fontTools.cffLib")
+
+
+def _convertCFF2ToCFF(cff, otFont):
+    """Converts this object from CFF2 format to CFF format. This conversion
+    is done 'in-place'. The conversion cannot be reversed.
+
+    The CFF2 font cannot be variable. (TODO Accept those and convert to the
+    default instance?)
+
+    This assumes a decompiled CFF table. (i.e. that the object has been
+    filled via :meth:`decompile` and e.g. not loaded from XML.)"""
+
+    cff.major = 1
+
+    topDictData = TopDictIndex(None, isCFF2=True)
+    for item in cff.topDictIndex:
+        # Iterate over, such that all are decompiled
+        topDictData.append(item)
+    cff.topDictIndex = topDictData
+    topDict = topDictData[0]
+
+    if hasattr(topDict, "VarStore"):
+        raise ValueError("Variable CFF2 font cannot be converted to CFF format.")
+
+    if hasattr(topDict, "Private"):
+        privateDict = topDict.Private
+    else:
+        privateDict = None
+    opOrder = buildOrder(topDictOperators)
+    topDict.order = opOrder
+
+    fdArray = topDict.FDArray
+    charStrings = topDict.CharStrings
+
+    for cs in charStrings.values():
+        cs.decompile()
+        cs.program.append("endchar")
+    for subrSets in [cff.GlobalSubrs] + [
+        getattr(fd.Private, "Subrs", []) for fd in fdArray
+    ]:
+        for cs in subrSets:
+            cs.program.append("return")
+
+    # Add (optimal) width to CharStrings that need it.
+    widths = defaultdict(list)
+    metrics = otFont["hmtx"].metrics
+    for glyphName in charStrings.keys():
+        cs, fdIndex = charStrings.getItemAndSelector(glyphName)
+        if fdIndex == None:
+            fdIndex = 0
+        widths[fdIndex].append(metrics[glyphName][0])
+    for fdIndex, widthList in widths.items():
+        bestDefault, bestNominal = optimizeWidths(widthList)
+        private = fdArray[fdIndex].Private
+        private.defaultWidthX = bestDefault
+        private.nominalWidthX = bestNominal
+    for glyphName in charStrings.keys():
+        cs, fdIndex = charStrings.getItemAndSelector(glyphName)
+        if fdIndex == None:
+            fdIndex = 0
+        private = fdArray[fdIndex].Private
+        width = metrics[glyphName][0]
+        if width != private.defaultWidthX:
+            cs.program.insert(0, width - private.nominalWidthX)
+
+
+def convertCFF2ToCFF(font, *, updatePostTable=True):
+    cff = font["CFF2"].cff
+    _convertCFF2ToCFF(cff, font)
+    del font["CFF2"]
+    table = font["CFF "] = newTable("CFF ")
+    table.cff = cff
+
+    if updatePostTable and "post" in font:
+        # Only version supported for fonts with CFF table is 0x00030000 not 0x20000
+        post = font["post"]
+        if post.formatType == 2.0:
+            post.formatType = 3.0
+
+
+def main(args=None):
+    """Convert CFF OTF font to CFF2 OTF font"""
+    if args is None:
+        import sys
+
+        args = sys.argv[1:]
+
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        "fonttools cffLib.CFFToCFF2",
+        description="Upgrade a CFF font to CFF2.",
+    )
+    parser.add_argument(
+        "input", metavar="INPUT.ttf", help="Input OTF file with CFF table."
+    )
+    parser.add_argument(
+        "-o",
+        "--output",
+        metavar="OUTPUT.ttf",
+        default=None,
+        help="Output instance OTF file (default: INPUT-CFF2.ttf).",
+    )
+    parser.add_argument(
+        "--no-recalc-timestamp",
+        dest="recalc_timestamp",
+        action="store_false",
+        help="Don't set the output font's timestamp to the current time.",
+    )
+    loggingGroup = parser.add_mutually_exclusive_group(required=False)
+    loggingGroup.add_argument(
+        "-v", "--verbose", action="store_true", help="Run more verbosely."
+    )
+    loggingGroup.add_argument(
+        "-q", "--quiet", action="store_true", help="Turn verbosity off."
+    )
+    options = parser.parse_args(args)
+
+    from fontTools import configLogger
+
+    configLogger(
+        level=("DEBUG" if options.verbose else "ERROR" if options.quiet else "INFO")
+    )
+
+    import os
+
+    infile = options.input
+    if not os.path.isfile(infile):
+        parser.error("No such file '{}'".format(infile))
+
+    outfile = (
+        makeOutputFileName(infile, overWrite=True, suffix="-CFF")
+        if not options.output
+        else options.output
+    )
+
+    font = TTFont(infile, recalcTimestamp=options.recalc_timestamp, recalcBBoxes=False)
+
+    convertCFF2ToCFF(font)
+
+    log.info(
+        "Saving %s",
+        outfile,
+    )
+    font.save(outfile)
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(main(sys.argv[1:]))

Lib/fontTools/cffLib/CFFToCFF2.py

@@ -0,0 +1,273 @@
+"""CFF to CFF2 converter."""
+
+from fontTools.ttLib import TTFont, newTable
+from fontTools.misc.cliTools import makeOutputFileName
+from fontTools.misc.psCharStrings import T2WidthExtractor
+from fontTools.cffLib import (
+    TopDictIndex,
+    FDArrayIndex,
+    FontDict,
+    buildOrder,
+    topDictOperators,
+    privateDictOperators,
+    topDictOperators2,
+    privateDictOperators2,
+)
+from io import BytesIO
+import logging
+
+__all__ = ["convertCFFToCFF2", "main"]
+
+
+log = logging.getLogger("fontTools.cffLib")
+
+
+class _NominalWidthUsedError(Exception):
+    def __add__(self, other):
+        raise self
+
+    def __radd__(self, other):
+        raise self
+
+
+def _convertCFFToCFF2(cff, otFont):
+    """Converts this object from CFF format to CFF2 format. This conversion
+    is done 'in-place'. The conversion cannot be reversed.
+
+    This assumes a decompiled CFF table. (i.e. that the object has been
+    filled via :meth:`decompile` and e.g. not loaded from XML.)"""
+
+    # Clean up T2CharStrings
+
+    topDict = cff.topDictIndex[0]
+    fdArray = topDict.FDArray if hasattr(topDict, "FDArray") else None
+    charStrings = topDict.CharStrings
+    globalSubrs = cff.GlobalSubrs
+    localSubrs = [getattr(fd.Private, "Subrs", []) for fd in fdArray] if fdArray else []
+
+    for glyphName in charStrings.keys():
+        cs, fdIndex = charStrings.getItemAndSelector(glyphName)
+        cs.decompile()
+
+    # Clean up subroutines first
+    for subrs in [globalSubrs] + localSubrs:
+        for subr in subrs:
+            program = subr.program
+            i = j = len(program)
+            try:
+                i = program.index("return")
+            except ValueError:
+                pass
+            try:
+                j = program.index("endchar")
+            except ValueError:
+                pass
+            program[min(i, j) :] = []
+
+    # Clean up glyph charstrings
+    nominalWidthXError = _NominalWidthUsedError()
+    for glyphName in charStrings.keys():
+        cs, fdIndex = charStrings.getItemAndSelector(glyphName)
+        program = cs.program
+        if fdIndex == None:
+            fdIndex = 0
+
+        # Intentionally use custom type for nominalWidthX, such that any
+        # CharString that has an explicit width encoded will throw back to us.
+        extractor = T2WidthExtractor(
+            localSubrs[fdIndex] if localSubrs else [],
+            globalSubrs,
+            nominalWidthXError,
+            0,
+        )
+        try:
+            extractor.execute(cs)
+        except _NominalWidthUsedError:
+            # Program has explicit width. We want to drop it, but can't
+            # just pop the first number since it may be a subroutine call.
+            # Instead, when seeing that, we embed the subroutine and recurse.
+            # This has the problem that some subroutines might become unused.
+            # We don't currently prune those. Subset module has code for this
+            # kind of stuff, possibly plug it in here if pruning becomes needed.
+            while program[1] in ["callsubr", "callgsubr"]:
+                subrNumber = program.pop(0)
+                op = program.pop(0)
+                bias = extractor.localBias if op == "callsubr" else extractor.globalBias
+                subrNumber += bias
+                subrSet = localSubrs[fdIndex] if op == "callsubr" else globalSubrs
+                subrProgram = subrSet[subrNumber].program
+                program[:0] = subrProgram
+            # Now pop the actual width
+            program.pop(0)
+
+        if program and program[-1] == "endchar":
+            program.pop()
+
+    # Upconvert TopDict
+
+    cff.major = 2
+    cff2GetGlyphOrder = cff.otFont.getGlyphOrder
+    topDictData = TopDictIndex(None, cff2GetGlyphOrder)
+    for item in cff.topDictIndex:
+        # Iterate over, such that all are decompiled
+        topDictData.append(item)
+    cff.topDictIndex = topDictData
+    topDict = topDictData[0]
+    if hasattr(topDict, "Private"):
+        privateDict = topDict.Private
+    else:
+        privateDict = None
+    opOrder = buildOrder(topDictOperators2)
+    topDict.order = opOrder
+    topDict.cff2GetGlyphOrder = cff2GetGlyphOrder
+
+    if not hasattr(topDict, "FDArray"):
+        fdArray = topDict.FDArray = FDArrayIndex()
+        fdArray.strings = None
+        fdArray.GlobalSubrs = topDict.GlobalSubrs
+        topDict.GlobalSubrs.fdArray = fdArray
+        charStrings = topDict.CharStrings
+        if charStrings.charStringsAreIndexed:
+            charStrings.charStringsIndex.fdArray = fdArray
+        else:
+            charStrings.fdArray = fdArray
+        fontDict = FontDict()
+        fontDict.setCFF2(True)
+        fdArray.append(fontDict)
+        fontDict.Private = privateDict
+        privateOpOrder = buildOrder(privateDictOperators2)
+        if privateDict is not None:
+            for entry in privateDictOperators:
+                key = entry[1]
+                if key not in privateOpOrder:
+                    if key in privateDict.rawDict:
+                        # print "Removing private dict", key
+                        del privateDict.rawDict[key]
+                    if hasattr(privateDict, key):
+                        delattr(privateDict, key)
+                        # print "Removing privateDict attr", key
+    else:
+        # clean up the PrivateDicts in the fdArray
+        fdArray = topDict.FDArray
+        privateOpOrder = buildOrder(privateDictOperators2)
+        for fontDict in fdArray:
+            fontDict.setCFF2(True)
+            for key in list(fontDict.rawDict.keys()):
+                if key not in fontDict.order:
+                    del fontDict.rawDict[key]
+                    if hasattr(fontDict, key):
+                        delattr(fontDict, key)
+
+            privateDict = fontDict.Private
+            for entry in privateDictOperators:
+                key = entry[1]
+                if key not in privateOpOrder:
+                    if key in list(privateDict.rawDict.keys()):
+                        # print "Removing private dict", key
+                        del privateDict.rawDict[key]
+                    if hasattr(privateDict, key):
+                        delattr(privateDict, key)
+                        # print "Removing privateDict attr", key
+
+    # Now delete up the deprecated topDict operators from CFF 1.0
+    for entry in topDictOperators:
+        key = entry[1]
+        if key not in opOrder:
+            if key in topDict.rawDict:
+                del topDict.rawDict[key]
+            if hasattr(topDict, key):
+                delattr(topDict, key)
+
+    # TODO(behdad): What does the following comment even mean? Both CFF and CFF2
+    # use the same T2Charstring class. I *think* what it means is that the CharStrings
+    # were loaded for CFF1, and we need to reload them for CFF2 to set varstore, etc
+    # on them. At least that's what I understand. It's probably safe to remove this
+    # and just set vstore where needed.
+
+    # At this point, the Subrs and Charstrings are all still T2Charstring class
+    # easiest to fix this by compiling, then decompiling again
+    file = BytesIO()
+    cff.compile(file, otFont, isCFF2=True)
+    file.seek(0)
+    cff.decompile(file, otFont, isCFF2=True)
+
+
+def convertCFFToCFF2(font):
+    cff = font["CFF "].cff
+    del font["CFF "]
+    _convertCFFToCFF2(cff, font)
+    table = font["CFF2"] = newTable("CFF2")
+    table.cff = cff
+
+
+def main(args=None):
+    """Convert CFF OTF font to CFF2 OTF font"""
+    if args is None:
+        import sys
+
+        args = sys.argv[1:]
+
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        "fonttools cffLib.CFFToCFF2",
+        description="Upgrade a CFF font to CFF2.",
+    )
+    parser.add_argument(
+        "input", metavar="INPUT.ttf", help="Input OTF file with CFF table."
+    )
+    parser.add_argument(
+        "-o",
+        "--output",
+        metavar="OUTPUT.ttf",
+        default=None,
+        help="Output instance OTF file (default: INPUT-CFF2.ttf).",
+    )
+    parser.add_argument(
+        "--no-recalc-timestamp",
+        dest="recalc_timestamp",
+        action="store_false",
+        help="Don't set the output font's timestamp to the current time.",
+    )
+    loggingGroup = parser.add_mutually_exclusive_group(required=False)
+    loggingGroup.add_argument(
+        "-v", "--verbose", action="store_true", help="Run more verbosely."
+    )
+    loggingGroup.add_argument(
+        "-q", "--quiet", action="store_true", help="Turn verbosity off."
+    )
+    options = parser.parse_args(args)
+
+    from fontTools import configLogger
+
+    configLogger(
+        level=("DEBUG" if options.verbose else "ERROR" if options.quiet else "INFO")
+    )
+
+    import os
+
+    infile = options.input
+    if not os.path.isfile(infile):
+        parser.error("No such file '{}'".format(infile))
+
+    outfile = (
+        makeOutputFileName(infile, overWrite=True, suffix="-CFF2")
+        if not options.output
+        else options.output
+    )
+
+    font = TTFont(infile, recalcTimestamp=options.recalc_timestamp, recalcBBoxes=False)
+
+    convertCFFToCFF2(font)
+
+    log.info(
+        "Saving %s",
+        outfile,
+    )
+    font.save(outfile)
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(main(sys.argv[1:]))

Lib/fontTools/cffLib/__init__.py

@@ -99,9 +99,6 @@ class _DesubroutinizingT2Decompiler(psCharStrings.SimpleT2Decompiler):
                 desubroutinized = desubroutinized[
                     : desubroutinized.index("endchar") + 1
                 ]
-            else:
-                if not len(desubroutinized) or desubroutinized[-1] != "return":
-                    desubroutinized.append("return")
 
         charString._desubroutinized = desubroutinized
         del charString._patches
@@ -389,91 +386,20 @@ class CFFFontSet(object):
             self.minor = int(attrs["value"])
 
     def convertCFFToCFF2(self, otFont):
-        """Converts this object from CFF format to CFF2 format. This conversion
+        from .CFFToCFF2 import _convertCFFToCFF2
-        is done 'in-place'. The conversion cannot be reversed.
 
-        This assumes a decompiled CFF table. (i.e. that the object has been
+        _convertCFFToCFF2(self, otFont)
-        filled via :meth:`decompile`.)"""
-        self.major = 2
-        cff2GetGlyphOrder = self.otFont.getGlyphOrder
-        topDictData = TopDictIndex(None, cff2GetGlyphOrder)
-        topDictData.items = self.topDictIndex.items
-        self.topDictIndex = topDictData
-        topDict = topDictData[0]
-        if hasattr(topDict, "Private"):
-            privateDict = topDict.Private
-        else:
-            privateDict = None
-        opOrder = buildOrder(topDictOperators2)
-        topDict.order = opOrder
-        topDict.cff2GetGlyphOrder = cff2GetGlyphOrder
-        for entry in topDictOperators:
-            key = entry[1]
-            if key not in opOrder:
-                if key in topDict.rawDict:
-                    del topDict.rawDict[key]
-                if hasattr(topDict, key):
-                    delattr(topDict, key)
 
-        if not hasattr(topDict, "FDArray"):
+    def convertCFF2ToCFF(self, otFont):
-            fdArray = topDict.FDArray = FDArrayIndex()
+        from .CFF2ToCFF import _convertCFF2ToCFF
-            fdArray.strings = None
-            fdArray.GlobalSubrs = topDict.GlobalSubrs
-            topDict.GlobalSubrs.fdArray = fdArray
-            charStrings = topDict.CharStrings
-            if charStrings.charStringsAreIndexed:
-                charStrings.charStringsIndex.fdArray = fdArray
-            else:
-                charStrings.fdArray = fdArray
-            fontDict = FontDict()
-            fontDict.setCFF2(True)
-            fdArray.append(fontDict)
-            fontDict.Private = privateDict
-            privateOpOrder = buildOrder(privateDictOperators2)
-            for entry in privateDictOperators:
-                key = entry[1]
-                if key not in privateOpOrder:
-                    if key in privateDict.rawDict:
-                        # print "Removing private dict", key
-                        del privateDict.rawDict[key]
-                    if hasattr(privateDict, key):
-                        delattr(privateDict, key)
-                        # print "Removing privateDict attr", key
-        else:
-            # clean up the PrivateDicts in the fdArray
-            fdArray = topDict.FDArray
-            privateOpOrder = buildOrder(privateDictOperators2)
-            for fontDict in fdArray:
-                fontDict.setCFF2(True)
-                for key in fontDict.rawDict.keys():
-                    if key not in fontDict.order:
-                        del fontDict.rawDict[key]
-                        if hasattr(fontDict, key):
-                            delattr(fontDict, key)
 
-                privateDict = fontDict.Private
+        _convertCFF2ToCFF(self, otFont)
-                for entry in privateDictOperators:
-                    key = entry[1]
-                    if key not in privateOpOrder:
-                        if key in privateDict.rawDict:
-                            # print "Removing private dict", key
-                            del privateDict.rawDict[key]
-                        if hasattr(privateDict, key):
-                            delattr(privateDict, key)
-                            # print "Removing privateDict attr", key
-        # At this point, the Subrs and Charstrings are all still T2Charstring class
-        # easiest to fix this by compiling, then decompiling again
-        file = BytesIO()
-        self.compile(file, otFont, isCFF2=True)
-        file.seek(0)
-        self.decompile(file, otFont, isCFF2=True)
 
     def desubroutinize(self):
         for fontName in self.fontNames:
             font = self[fontName]
             cs = font.CharStrings
-            for g in font.charset:
+            for c in cs.values():
-                c, _ = cs.getItemAndSelector(g)
                 c.decompile()
                 subrs = getattr(c.private, "Subrs", [])
                 decompiler = _DesubroutinizingT2Decompiler(
@@ -764,8 +690,8 @@ class Index(object):
     compilerClass = IndexCompiler
 
     def __init__(self, file=None, isCFF2=None):
-        assert (isCFF2 is None) == (file is None)
         self.items = []
+        self.offsets = offsets = []
         name = self.__class__.__name__
         if file is None:
             return
@@ -782,7 +708,6 @@ class Index(object):
         offSize = readCard8(file)
         log.log(DEBUG, "    index count: %s offSize: %s", count, offSize)
         assert offSize <= 4, "offSize too large: %s" % offSize
-        self.offsets = offsets = []
         pad = b"\0" * (4 - offSize)
         for index in range(count + 1):
             chunk = file.read(offSize)
@@ -960,7 +885,6 @@ class TopDictIndex(Index):
     compilerClass = TopDictIndexCompiler
 
     def __init__(self, file=None, cff2GetGlyphOrder=None, topSize=0, isCFF2=None):
-        assert (isCFF2 is None) == (file is None)
         self.cff2GetGlyphOrder = cff2GetGlyphOrder
         if file is not None and isCFF2:
             self._isCFF2 = isCFF2
@@ -2861,9 +2785,11 @@ class PrivateDict(BaseDict):
             # Provide dummy values. This avoids needing to provide
             # an isCFF2 state in a lot of places.
             self.nominalWidthX = self.defaultWidthX = None
+            self._isCFF2 = True
         else:
             self.defaults = buildDefaults(privateDictOperators)
             self.order = buildOrder(privateDictOperators)
+            self._isCFF2 = False
 
     @property
     def in_cff2(self):

Lib/fontTools/cffLib/specializer.py

@@ -43,10 +43,8 @@ def programToCommands(program, getNumRegions=None):
     hintmask/cntrmask argument, as well as stray arguments at the end of the
     program (🤷).
     'getNumRegions' may be None, or a callable object. It must return the
-    number of regions. 'getNumRegions' takes a single argument, vsindex. If
+    number of regions. 'getNumRegions' takes a single argument, vsindex. It
-    the vsindex argument is None, getNumRegions returns the default number
+    returns the numRegions for the vsindex.
-    of regions for the charstring, else it returns the numRegions for
-    the vsindex.
     The Charstring may or may not start with a width value. If the first
     non-blend operator has an odd number of arguments, then the first argument is
     a width, and is popped off. This is complicated with blend operators, as
@@ -61,7 +59,7 @@ def programToCommands(program, getNumRegions=None):
     """
 
     seenWidthOp = False
-    vsIndex = None
+    vsIndex = 0
     lenBlendStack = 0
     lastBlendIndex = 0
     commands = []

Lib/fontTools/cffLib/width.py

@@ -13,6 +13,9 @@ from operator import add
 from functools import reduce
 
 
+__all__ = ["optimizeWidths", "main"]
+
+
 class missingdict(dict):
     def __init__(self, missing_func):
         self.missing_func = missing_func

Lib/fontTools/merge/tables.py

@@ -294,6 +294,8 @@ def merge(self, m, tables):
                 extractor.execute(c)
                 width = extractor.width
                 if width is not defaultWidthXToken:
+                    # The following will be wrong if the width is added
+                    # by a subroutine. Ouch!
                     c.program.pop(0)
                 else:
                     width = defaultWidthX

Lib/fontTools/ttLib/ttFont.py

@@ -537,7 +537,7 @@ class TTFont(object):
                 #
                 # Not enough names found in the 'post' table.
                 # Can happen when 'post' format 1 is improperly used on a font that
-                # has more than 258 glyphs (the lenght of 'standardGlyphOrder').
+                # has more than 258 glyphs (the length of 'standardGlyphOrder').
                 #
                 log.warning(
                     "Not enough names found in the 'post' table, generating them from cmap instead"

Lib/fontTools/varLib/__init__.py

@@ -845,9 +845,10 @@ def _add_CFF2(varFont, model, master_fonts):
 
     glyphOrder = varFont.getGlyphOrder()
     if "CFF2" not in varFont:
-        from .cff import convertCFFtoCFF2
+        from fontTools.cffLib.CFFToCFF2 import convertCFFToCFF2
+
+        convertCFFToCFF2(varFont)
 
-        convertCFFtoCFF2(varFont)
     ordered_fonts_list = model.reorderMasters(master_fonts, model.reverseMapping)
     # re-ordering the master list simplifies building the CFF2 data item lists.
     merge_region_fonts(varFont, model, ordered_fonts_list, glyphOrder)

Lib/fontTools/varLib/cff.py

@@ -49,95 +49,6 @@ def addCFFVarStore(varFont, varModel, varDataList, masterSupports):
                 fontDict.Private.vstore = topDict.VarStore
 
 
-def lib_convertCFFToCFF2(cff, otFont):
-    # This assumes a decompiled CFF table.
-    cff2GetGlyphOrder = cff.otFont.getGlyphOrder
-    topDictData = TopDictIndex(None, cff2GetGlyphOrder, None)
-    topDictData.items = cff.topDictIndex.items
-    cff.topDictIndex = topDictData
-    topDict = topDictData[0]
-    if hasattr(topDict, "Private"):
-        privateDict = topDict.Private
-    else:
-        privateDict = None
-    opOrder = buildOrder(topDictOperators2)
-    topDict.order = opOrder
-    topDict.cff2GetGlyphOrder = cff2GetGlyphOrder
-    if not hasattr(topDict, "FDArray"):
-        fdArray = topDict.FDArray = FDArrayIndex()
-        fdArray.strings = None
-        fdArray.GlobalSubrs = topDict.GlobalSubrs
-        topDict.GlobalSubrs.fdArray = fdArray
-        charStrings = topDict.CharStrings
-        if charStrings.charStringsAreIndexed:
-            charStrings.charStringsIndex.fdArray = fdArray
-        else:
-            charStrings.fdArray = fdArray
-        fontDict = FontDict()
-        fontDict.setCFF2(True)
-        fdArray.append(fontDict)
-        fontDict.Private = privateDict
-        privateOpOrder = buildOrder(privateDictOperators2)
-        if privateDict is not None:
-            for entry in privateDictOperators:
-                key = entry[1]
-                if key not in privateOpOrder:
-                    if key in privateDict.rawDict:
-                        # print "Removing private dict", key
-                        del privateDict.rawDict[key]
-                    if hasattr(privateDict, key):
-                        delattr(privateDict, key)
-                        # print "Removing privateDict attr", key
-    else:
-        # clean up the PrivateDicts in the fdArray
-        fdArray = topDict.FDArray
-        privateOpOrder = buildOrder(privateDictOperators2)
-        for fontDict in fdArray:
-            fontDict.setCFF2(True)
-            for key in list(fontDict.rawDict.keys()):
-                if key not in fontDict.order:
-                    del fontDict.rawDict[key]
-                    if hasattr(fontDict, key):
-                        delattr(fontDict, key)
-
-            privateDict = fontDict.Private
-            for entry in privateDictOperators:
-                key = entry[1]
-                if key not in privateOpOrder:
-                    if key in privateDict.rawDict:
-                        # print "Removing private dict", key
-                        del privateDict.rawDict[key]
-                    if hasattr(privateDict, key):
-                        delattr(privateDict, key)
-                        # print "Removing privateDict attr", key
-    # Now delete up the deprecated topDict operators from CFF 1.0
-    for entry in topDictOperators:
-        key = entry[1]
-        if key not in opOrder:
-            if key in topDict.rawDict:
-                del topDict.rawDict[key]
-            if hasattr(topDict, key):
-                delattr(topDict, key)
-
-    # At this point, the Subrs and Charstrings are all still T2Charstring class
-    # easiest to fix this by compiling, then decompiling again
-    cff.major = 2
-    file = BytesIO()
-    cff.compile(file, otFont, isCFF2=True)
-    file.seek(0)
-    cff.decompile(file, otFont, isCFF2=True)
-
-
-def convertCFFtoCFF2(varFont):
-    # Convert base font to a single master CFF2 font.
-    cffTable = varFont["CFF "]
-    lib_convertCFFToCFF2(cffTable.cff, varFont)
-    newCFF2 = newTable("CFF2")
-    newCFF2.cff = cffTable.cff
-    varFont["CFF2"] = newCFF2
-    del varFont["CFF "]
-
-
 def conv_to_int(num):
     if isinstance(num, float) and num.is_integer():
         return int(num)

Lib/fontTools/varLib/instancer/__init__.py

@@ -89,7 +89,7 @@ from fontTools.misc.fixedTools import (
     otRound,
 )
 from fontTools.varLib.models import normalizeValue, piecewiseLinearMap
-from fontTools.ttLib import TTFont
+from fontTools.ttLib import TTFont, newTable
 from fontTools.ttLib.tables.TupleVariation import TupleVariation
 from fontTools.ttLib.tables import _g_l_y_f
 from fontTools import varLib
@@ -97,6 +97,13 @@ from fontTools import varLib
 # we import the `subset` module because we use the `prune_lookups` method on the GSUB
 # table class, and that method is only defined dynamically upon importing `subset`
 from fontTools import subset  # noqa: F401
+from fontTools.cffLib import privateDictOperators2
+from fontTools.cffLib.specializer import (
+    programToCommands,
+    commandsToProgram,
+    specializeCommands,
+    generalizeCommands,
+)
 from fontTools.varLib import builder
 from fontTools.varLib.mvar import MVAR_ENTRIES
 from fontTools.varLib.merger import MutatorMerger
@@ -566,6 +573,259 @@ def changeTupleVariationAxisLimit(var, axisTag, axisLimit):
     return out
 
 
+def instantiateCFF2(
+    varfont,
+    axisLimits,
+    *,
+    round=round,
+    specialize=True,
+    generalize=False,
+    downgrade=False,
+):
+    # The algorithm here is rather simple:
+    #
+    # Take all blend operations and store their deltas in the (otherwise empty)
+    # CFF2 VarStore. Then, instantiate the VarStore with the given axis limits,
+    # and read back the new deltas. This is done for both the CharStrings and
+    # the Private dicts.
+    #
+    # Then prune unused things and possibly drop the VarStore if it's empty.
+    # In which case, downgrade to CFF table if requested.
+
+    log.info("Instantiating CFF2 table")
+
+    fvarAxes = varfont["fvar"].axes
+
+    cff = varfont["CFF2"].cff
+    topDict = cff.topDictIndex[0]
+    varStore = topDict.VarStore.otVarStore
+    if not varStore:
+        if downgrade:
+            from fontTools.cffLib.CFF2ToCFF import convertCFF2ToCFF
+
+            convertCFF2ToCFF(varfont)
+        return
+
+    cff.desubroutinize()
+
+    def getNumRegions(vsindex):
+        return varStore.VarData[vsindex if vsindex is not None else 0].VarRegionCount
+
+    charStrings = topDict.CharStrings.values()
+
+    # Gather all unique private dicts
+    uniquePrivateDicts = set()
+    privateDicts = []
+    for fd in topDict.FDArray:
+        if fd.Private not in uniquePrivateDicts:
+            uniquePrivateDicts.add(fd.Private)
+            privateDicts.append(fd.Private)
+
+    allCommands = []
+    for cs in charStrings:
+        assert cs.private.vstore.otVarStore is varStore  # Or in many places!!
+        commands = programToCommands(cs.program, getNumRegions=getNumRegions)
+        if generalize:
+            commands = generalizeCommands(commands)
+        if specialize:
+            commands = specializeCommands(commands, generalizeFirst=not generalize)
+        allCommands.append(commands)
+
+    def storeBlendsToVarStore(arg):
+        if not isinstance(arg, list):
+            return
+
+        if any(isinstance(subarg, list) for subarg in arg[:-1]):
+            raise NotImplementedError("Nested blend lists not supported (yet)")
+
+        count = arg[-1]
+        assert (len(arg) - 1) % count == 0
+        nRegions = (len(arg) - 1) // count - 1
+        assert nRegions == getNumRegions(vsindex)
+        for i in range(count, len(arg) - 1, nRegions):
+            deltas = arg[i : i + nRegions]
+            assert len(deltas) == nRegions
+            varData = varStore.VarData[vsindex]
+            varData.Item.append(deltas)
+            varData.ItemCount += 1
+
+    def fetchBlendsFromVarStore(arg):
+        if not isinstance(arg, list):
+            return [arg]
+
+        if any(isinstance(subarg, list) for subarg in arg[:-1]):
+            raise NotImplementedError("Nested blend lists not supported (yet)")
+
+        count = arg[-1]
+        assert (len(arg) - 1) % count == 0
+        numRegions = getNumRegions(vsindex)
+        newDefaults = []
+        newDeltas = []
+        for i in range(count):
+            defaultValue = arg[i]
+
+            major = vsindex
+            minor = varDataCursor[major]
+            varDataCursor[major] += 1
+
+            varIdx = (major << 16) + minor
+
+            defaultValue += round(defaultDeltas[varIdx])
+            newDefaults.append(defaultValue)
+
+            varData = varStore.VarData[major]
+            deltas = varData.Item[minor]
+            assert len(deltas) == numRegions
+            newDeltas.extend(deltas)
+
+        if not numRegions:
+            return newDefaults  # No deltas, just return the defaults
+
+        return [newDefaults + newDeltas + [count]]
+
+    # Check VarData's are empty
+    for varData in varStore.VarData:
+        assert varData.Item == []
+        assert varData.ItemCount == 0
+
+    # Add charstring blend lists to VarStore so we can instantiate them
+    for commands in allCommands:
+        vsindex = 0
+        for command in commands:
+            if command[0] == "vsindex":
+                vsindex = command[1][0]
+                continue
+            for arg in command[1]:
+                storeBlendsToVarStore(arg)
+
+    # Add private blend lists to VarStore so we can instantiate values
+    vsindex = 0
+    for opcode, name, arg_type, default, converter in privateDictOperators2:
+        if arg_type not in ("number", "delta", "array"):
+            continue
+
+        vsindex = 0
+        for private in privateDicts:
+            if not hasattr(private, name):
+                continue
+            values = getattr(private, name)
+
+            if name == "vsindex":
+                vsindex = values[0]
+                continue
+
+            if arg_type == "number":
+                values = [values]
+
+            for value in values:
+                if not isinstance(value, list):
+                    continue
+
+                assert len(value) % (getNumRegions(vsindex) + 1) == 0
+                count = len(value) // (getNumRegions(vsindex) + 1)
+                storeBlendsToVarStore(value + [count])
+
+    # Instantiate VarStore
+    defaultDeltas = instantiateItemVariationStore(varStore, fvarAxes, axisLimits)
+
+    # Read back new charstring blends from the instantiated VarStore
+    varDataCursor = [0] * len(varStore.VarData)
+    for commands in allCommands:
+        vsindex = 0
+        for command in commands:
+            if command[0] == "vsindex":
+                vsindex = command[1][0]
+                continue
+            newArgs = []
+            for arg in command[1]:
+                newArgs.extend(fetchBlendsFromVarStore(arg))
+            command[1][:] = newArgs
+
+    # Read back new private blends from the instantiated VarStore
+    for opcode, name, arg_type, default, converter in privateDictOperators2:
+        if arg_type not in ("number", "delta", "array"):
+            continue
+
+        for private in privateDicts:
+            if not hasattr(private, name):
+                continue
+            values = getattr(private, name)
+            if arg_type == "number":
+                values = [values]
+
+            newValues = []
+            for value in values:
+                if not isinstance(value, list):
+                    newValues.append(value)
+                    continue
+
+                value.append(1)
+                value = fetchBlendsFromVarStore(value)
+                newValues.extend(v[:-1] if isinstance(v, list) else v for v in value)
+
+            if arg_type == "number":
+                newValues = newValues[0]
+
+            setattr(private, name, newValues)
+
+    # Empty out the VarStore
+    for i, varData in enumerate(varStore.VarData):
+        assert varDataCursor[i] == varData.ItemCount, (
+            varDataCursor[i],
+            varData.ItemCount,
+        )
+        varData.Item = []
+        varData.ItemCount = 0
+
+    # Remove vsindex commands that are no longer needed, collect those that are.
+    usedVsindex = set()
+    for commands in allCommands:
+        if any(isinstance(arg, list) for command in commands for arg in command[1]):
+            vsindex = 0
+            for command in commands:
+                if command[0] == "vsindex":
+                    vsindex = command[1][0]
+                    continue
+                if any(isinstance(arg, list) for arg in command[1]):
+                    usedVsindex.add(vsindex)
+        else:
+            commands[:] = [command for command in commands if command[0] != "vsindex"]
+
+    # Remove unused VarData and update vsindex values
+    vsindexMapping = {v: i for i, v in enumerate(sorted(usedVsindex))}
+    varStore.VarData = [
+        varData for i, varData in enumerate(varStore.VarData) if i in usedVsindex
+    ]
+    varStore.VarDataCount = len(varStore.VarData)
+    for commands in allCommands:
+        for command in commands:
+            if command[0] == "vsindex":
+                command[1][0] = vsindexMapping[command[1][0]]
+
+    # Remove initial vsindex commands that are implied
+    for commands in allCommands:
+        if commands and commands[0] == ("vsindex", [0]):
+            commands.pop(0)
+
+    # Ship the charstrings!
+    for cs, commands in zip(charStrings, allCommands):
+        cs.program = commandsToProgram(commands)
+
+    # Remove empty VarStore
+    if not varStore.VarData:
+        if "VarStore" in topDict.rawDict:
+            del topDict.rawDict["VarStore"]
+        del topDict.VarStore
+        del topDict.CharStrings.varStore
+        for private in privateDicts:
+            del private.vstore
+
+        if downgrade:
+            from fontTools.cffLib.CFF2ToCFF import convertCFF2ToCFF
+
+            convertCFF2ToCFF(varfont)
+
+
 def _instantiateGvarGlyph(
     glyphname, glyf, gvar, hMetrics, vMetrics, axisLimits, optimize=True
 ):
@@ -765,22 +1025,57 @@ def _remapVarIdxMap(table, attrName, varIndexMapping, glyphOrder):
 
 
 # TODO(anthrotype) Add support for HVAR/VVAR in CFF2
-def _instantiateVHVAR(varfont, axisLimits, tableFields):
+def _instantiateVHVAR(varfont, axisLimits, tableFields, *, round=round):
     location = axisLimits.pinnedLocation()
     tableTag = tableFields.tableTag
     fvarAxes = varfont["fvar"].axes
-    # Deltas from gvar table have already been applied to the hmtx/vmtx. For full
-    # instances (i.e. all axes pinned), we can simply drop HVAR/VVAR and return
-    if set(location).issuperset(axis.axisTag for axis in fvarAxes):
-        log.info("Dropping %s table", tableTag)
-        del varfont[tableTag]
-        return
 
     log.info("Instantiating %s table", tableTag)
     vhvar = varfont[tableTag].table
     varStore = vhvar.VarStore
-    # since deltas were already applied, the return value here is ignored
+
-    instantiateItemVariationStore(varStore, fvarAxes, axisLimits)
+    if "glyf" in varfont:
+        # Deltas from gvar table have already been applied to the hmtx/vmtx. For full
+        # instances (i.e. all axes pinned), we can simply drop HVAR/VVAR and return
+        if set(location).issuperset(axis.axisTag for axis in fvarAxes):
+            log.info("Dropping %s table", tableTag)
+            del varfont[tableTag]
+            return
+
+    defaultDeltas = instantiateItemVariationStore(varStore, fvarAxes, axisLimits)
+
+    if "glyf" not in varfont:
+        # CFF2 fonts need hmtx/vmtx updated here. For glyf fonts, the instantiateGvar
+        # function already updated the hmtx/vmtx from phantom points. Maybe remove
+        # that and do it here for both CFF2 and glyf fonts?
+        #
+        # Specially, if a font has glyf but not gvar, the hmtx/vmtx will not have been
+        # updated by instantiateGvar. Though one can call that a faulty font.
+        metricsTag = "vmtx" if tableTag == "VVAR" else "hmtx"
+        if metricsTag in varfont:
+            advMapping = getattr(vhvar, tableFields.advMapping)
+            metricsTable = varfont[metricsTag]
+            metrics = metricsTable.metrics
+            for glyphName, (advanceWidth, sb) in metrics.items():
+                if advMapping:
+                    varIdx = advMapping.mapping[glyphName]
+                else:
+                    varIdx = varfont.getGlyphID(glyphName)
+                metrics[glyphName] = (advanceWidth + round(defaultDeltas[varIdx]), sb)
+
+            if (
+                tableTag == "VVAR"
+                and getattr(vhvar, tableFields.vOrigMapping) is not None
+            ):
+                log.warning(
+                    "VORG table not yet updated to reflect changes in VVAR table"
+                )
+
+            # For full instances (i.e. all axes pinned), we can simply drop HVAR/VVAR and return
+            if set(location).issuperset(axis.axisTag for axis in fvarAxes):
+                log.info("Dropping %s table", tableTag)
+                del varfont[tableTag]
+                return
 
     if varStore.VarRegionList.Region:
         # Only re-optimize VarStore if the HVAR/VVAR already uses indirect AdvWidthMap
@@ -923,6 +1218,8 @@ def instantiateItemVariationStore(itemVarStore, fvarAxes, axisLimits):
     newItemVarStore = tupleVarStore.asItemVarStore()
 
     itemVarStore.VarRegionList = newItemVarStore.VarRegionList
+    if not hasattr(itemVarStore, "VarDataCount"):  # Happens fromXML
+        itemVarStore.VarDataCount = len(newItemVarStore.VarData)
     assert itemVarStore.VarDataCount == newItemVarStore.VarDataCount
     itemVarStore.VarData = newItemVarStore.VarData
 
@@ -1222,9 +1519,6 @@ def sanityCheckVariableTables(varfont):
     if "gvar" in varfont:
         if "glyf" not in varfont:
             raise ValueError("Can't have gvar without glyf")
-    # TODO(anthrotype) Remove once we do support partial instancing CFF2
-    if "CFF2" in varfont:
-        raise NotImplementedError("Instancing CFF2 variable fonts is not supported yet")
 
 
 def instantiateVariableFont(
@@ -1234,6 +1528,8 @@ def instantiateVariableFont(
     optimize=True,
     overlap=OverlapMode.KEEP_AND_SET_FLAGS,
     updateFontNames=False,
+    *,
+    downgradeCFF2=False,
 ):
     """Instantiate variable font, either fully or partially.
 
@@ -1273,6 +1569,11 @@ def instantiateVariableFont(
             in the head and OS/2 table will be updated so they conform to the R/I/B/BI
             model. If the STAT table is missing or an Axis Value table is missing for
             a given axis coordinate, a ValueError will be raised.
+        downgradeCFF2 (bool): if True, downgrade the CFF2 table to CFF table when possible
+            ie. full instancing of all axes. This is useful for compatibility with older
+            software that does not support CFF2. Defaults to False. Note that this
+            operation also removes overlaps within glyph shapes, as CFF does not support
+            overlaps but CFF2 does.
     """
     # 'overlap' used to be bool and is now enum; for backward compat keep accepting bool
     overlap = OverlapMode(int(overlap))
@@ -1297,6 +1598,9 @@ def instantiateVariableFont(
         log.info("Updating name table")
         names.updateNameTable(varfont, axisLimits)
 
+    if "CFF2" in varfont:
+        instantiateCFF2(varfont, normalizedLimits, downgrade=downgradeCFF2)
+
     if "gvar" in varfont:
         instantiateGvar(varfont, normalizedLimits, optimize=optimize)
 
@@ -1488,6 +1792,11 @@ def parseArgs(args):
         help="Update the instantiated font's `name` table. Input font must have "
         "a STAT table with Axis Value Tables",
     )
+    parser.add_argument(
+        "--downgrade-cff2",
+        action="store_true",
+        help="If all axes are pinned, downgrade CFF2 to CFF table format",
+    )
     parser.add_argument(
         "--no-recalc-timestamp",
         dest="recalc_timestamp",
@@ -1559,6 +1868,7 @@ def main(args=None):
         optimize=options.optimize,
         overlap=options.overlap,
         updateFontNames=options.update_name_table,
+        downgradeCFF2=options.downgrade_cff2,
     )
 
     suffix = "-instance" if isFullInstance else "-partial"

Tests/fontBuilder/fontBuilder_test.py

@@ -330,9 +330,9 @@ def test_build_cff_to_cff2(tmpdir):
     }
     fb.setupCFF("TestFont", {}, charStrings, {})
 
-    from fontTools.varLib.cff import convertCFFtoCFF2
+    from fontTools.cffLib.CFFToCFF2 import convertCFFToCFF2
 
-    convertCFFtoCFF2(fb.font)
+    convertCFFToCFF2(fb.font)
 
 
 def test_setupNameTable_no_mac():

Tests/varLib/instancer/data/CFF2Instancer-VF-1.ttx

@@ -0,0 +1,729 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="OTTO" ttLibVersion="4.51">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="hyphen"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="2.004"/>
+    <checkSumAdjustment value="0x9cb1a5ae"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00000011"/>
+    <unitsPerEm value="1000"/>
+    <created value="Thu Apr 29 17:39:47 2021"/>
+    <modified value="Thu Apr 29 08:51:43 2021"/>
+    <xMin value="-991"/>
+    <yMin value="-1050"/>
+    <xMax value="2930"/>
+    <yMax value="1810"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="3"/>
+    <fontDirectionHint value="2"/>
+    <indexToLocFormat value="0"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="0x00010000"/>
+    <ascent value="1160"/>
+    <descent value="-288"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="3000"/>
+    <minLeftSideBearing value="-991"/>
+    <minRightSideBearing value="-519"/>
+    <xMaxExtent value="2930"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="2"/>
+  </hhea>
+
+  <maxp>
+    <tableVersion value="0x5000"/>
+    <numGlyphs value="2"/>
+  </maxp>
+
+  <OS_2>
+    <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
+         will be recalculated by the compiler -->
+    <version value="3"/>
+    <xAvgCharWidth value="989"/>
+    <usWeightClass value="100"/>
+    <usWidthClass value="5"/>
+    <fsType value="00000000 00000000"/>
+    <ySubscriptXSize value="650"/>
+    <ySubscriptYSize value="600"/>
+    <ySubscriptXOffset value="0"/>
+    <ySubscriptYOffset value="75"/>
+    <ySuperscriptXSize value="650"/>
+    <ySuperscriptYSize value="600"/>
+    <ySuperscriptXOffset value="0"/>
+    <ySuperscriptYOffset value="350"/>
+    <yStrikeoutSize value="50"/>
+    <yStrikeoutPosition value="325"/>
+    <sFamilyClass value="0"/>
+    <panose>
+      <bFamilyType value="2"/>
+      <bSerifStyle value="11"/>
+      <bWeight value="2"/>
+      <bProportion value="0"/>
+      <bContrast value="0"/>
+      <bStrokeVariation value="0"/>
+      <bArmStyle value="0"/>
+      <bLetterForm value="0"/>
+      <bMidline value="0"/>
+      <bXHeight value="0"/>
+    </panose>
+    <ulUnicodeRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulUnicodeRange2 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
+    <achVendID value="ADBO"/>
+    <fsSelection value="00000000 00000000"/>
+    <usFirstCharIndex value="45"/>
+    <usLastCharIndex value="45"/>
+    <sTypoAscender value="880"/>
+    <sTypoDescender value="-120"/>
+    <sTypoLineGap value="0"/>
+    <usWinAscent value="1160"/>
+    <usWinDescent value="288"/>
+    <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="543"/>
+    <sCapHeight value="733"/>
+    <usDefaultChar value="0"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="6"/>
+  </OS_2>
+
+  <hmtx>
+    <mtx name=".notdef" width="1000" lsb="100"/>
+    <mtx name="hyphen" width="324" lsb="44"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="0" platEncID="3" language="0">
+      <map code="0x2d" name="hyphen"/><!-- HYPHEN-MINUS -->
+    </cmap_format_4>
+    <cmap_format_4 platformID="3" platEncID="1" language="0">
+      <map code="0x2d" name="hyphen"/><!-- HYPHEN-MINUS -->
+    </cmap_format_4>
+  </cmap>
+
+  <name>
+    <namerecord nameID="0" platformID="3" platEncID="1" langID="0x409">
+      © 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
+    </namerecord>
+    <namerecord nameID="1" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
+      2.004;ADBO;NotoSansSC-Thin;ADOBE
+    </namerecord>
+    <namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
+      Version 2.004;hotconv 1.0.118;makeotfexe 2.5.65603
+    </namerecord>
+    <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Thin
+    </namerecord>
+    <namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="258" platformID="3" platEncID="1" langID="0x409">
+      Thin
+    </namerecord>
+    <namerecord nameID="259" platformID="3" platEncID="1" langID="0x409">
+      Light
+    </namerecord>
+    <namerecord nameID="260" platformID="3" platEncID="1" langID="0x409">
+      DemiLight
+    </namerecord>
+    <namerecord nameID="261" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="262" platformID="3" platEncID="1" langID="0x409">
+      Medium
+    </namerecord>
+    <namerecord nameID="263" platformID="3" platEncID="1" langID="0x409">
+      Bold
+    </namerecord>
+    <namerecord nameID="264" platformID="3" platEncID="1" langID="0x409">
+      Black
+    </namerecord>
+    <namerecord nameID="265" platformID="3" platEncID="1" langID="0x409">
+      Weight
+    </namerecord>
+    <namerecord nameID="266" platformID="3" platEncID="1" langID="0x409">
+      Thin
+    </namerecord>
+    <namerecord nameID="267" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Thin
+    </namerecord>
+    <namerecord nameID="268" platformID="3" platEncID="1" langID="0x409">
+      Light
+    </namerecord>
+    <namerecord nameID="269" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Light
+    </namerecord>
+    <namerecord nameID="270" platformID="3" platEncID="1" langID="0x409">
+      DemiLight
+    </namerecord>
+    <namerecord nameID="271" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-DemiLight
+    </namerecord>
+    <namerecord nameID="272" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="273" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Regular
+    </namerecord>
+    <namerecord nameID="274" platformID="3" platEncID="1" langID="0x409">
+      Medium
+    </namerecord>
+    <namerecord nameID="275" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Medium
+    </namerecord>
+    <namerecord nameID="276" platformID="3" platEncID="1" langID="0x409">
+      Bold
+    </namerecord>
+    <namerecord nameID="277" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Bold
+    </namerecord>
+    <namerecord nameID="278" platformID="3" platEncID="1" langID="0x409">
+      Black
+    </namerecord>
+    <namerecord nameID="279" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Black
+    </namerecord>
+  </name>
+
+  <post>
+    <formatType value="3.0"/>
+    <italicAngle value="0.0"/>
+    <underlinePosition value="-125"/>
+    <underlineThickness value="50"/>
+    <isFixedPitch value="0"/>
+    <minMemType42 value="0"/>
+    <maxMemType42 value="0"/>
+    <minMemType1 value="0"/>
+    <maxMemType1 value="0"/>
+  </post>
+
+  <CFF2>
+    <major value="2"/>
+    <minor value="0"/>
+    <CFFFont name="CFF2Font">
+      <FontMatrix value="0.001 0 0 0.001 0 0"/>
+      <FDSelect format="0"/>
+      <FDArray>
+        <FontDict index="0">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="1"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+        <FontDict index="1">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="0"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+      </FDArray>
+      <CharStrings>
+        <CharString name=".notdef" fdSelectIndex="0">
+        </CharString>
+        <CharString name="hyphen" fdSelectIndex="1">
+          44 256 6 -29 2 blend
+          rmoveto
+          239 35 -239 44 90 -44 3 blend
+          hlineto
+        </CharString>
+      </CharStrings>
+      <VarStore Format="1">
+        <Format value="1"/>
+        <VarRegionList>
+          <!-- RegionAxisCount=1 -->
+          <!-- RegionCount=1 -->
+          <Region index="0">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+        </VarRegionList>
+        <!-- VarDataCount=1 -->
+        <VarData index="0">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=1 -->
+          <VarRegionIndex index="0" value="0"/>
+        </VarData>
+      </VarStore>
+    </CFFFont>
+
+    <GlobalSubrs>
+      <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+    </GlobalSubrs>
+  </CFF2>
+
+  <GPOS>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=6 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="0"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="cyrl"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="1"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="2">
+        <ScriptTag value="grek"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="2"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="3">
+        <ScriptTag value="hani"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="3"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="4">
+        <ScriptTag value="kana"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="4"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="5">
+        <ScriptTag value="latn"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="5"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=6 -->
+      <FeatureRecord index="0">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="1">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="2">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="3">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="4">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="5">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=1 -->
+      <Lookup index="0">
+        <LookupType value="2"/>
+        <LookupFlag value="0"/>
+        <!-- SubTableCount=1 -->
+        <PairPos index="0" Format="2">
+          <Coverage>
+            <Glyph value="hyphen"/>
+          </Coverage>
+          <ValueFormat1 value="68"/>
+          <ValueFormat2 value="0"/>
+          <ClassDef1>
+          </ClassDef1>
+          <ClassDef2>
+            <ClassDef glyph="hyphen" class="1"/>
+          </ClassDef2>
+          <!-- Class1Count=1 -->
+          <!-- Class2Count=2 -->
+          <Class1Record index="0">
+            <Class2Record index="0">
+              <Value1 XAdvance="0"/>
+            </Class2Record>
+            <Class2Record index="1">
+              <Value1 XAdvance="0"/>
+            </Class2Record>
+          </Class1Record>
+        </PairPos>
+      </Lookup>
+    </LookupList>
+  </GPOS>
+
+  <GSUB>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=6 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="cyrl"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="2">
+        <ScriptTag value="grek"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="3">
+        <ScriptTag value="hani"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="4">
+        <ScriptTag value="kana"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="5">
+        <ScriptTag value="latn"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GSUB>
+
+  <HVAR>
+    <Version value="0x00010000"/>
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=1 -->
+        <!-- RegionCount=1 -->
+        <Region index="0">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+        </Region>
+      </VarRegionList>
+      <!-- VarDataCount=1 -->
+      <VarData index="0">
+        <!-- ItemCount=2 -->
+        <NumShorts value="0"/>
+        <!-- VarRegionCount=1 -->
+        <VarRegionIndex index="0" value="0"/>
+        <Item index="0" value="[0]"/>
+        <Item index="1" value="[59]"/>
+      </VarData>
+    </VarStore>
+  </HVAR>
+
+  <STAT>
+    <Version value="0x00010001"/>
+    <DesignAxisRecordSize value="8"/>
+    <!-- DesignAxisCount=1 -->
+    <DesignAxisRecord>
+      <Axis index="0">
+        <AxisTag value="wght"/>
+        <AxisNameID value="265"/>  <!-- Weight -->
+        <AxisOrdering value="0"/>
+      </Axis>
+    </DesignAxisRecord>
+    <!-- AxisValueCount=7 -->
+    <AxisValueArray>
+      <AxisValue index="0" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="258"/>  <!-- Thin -->
+        <NominalValue value="100.0"/>
+        <RangeMinValue value="100.0"/>
+        <RangeMaxValue value="199.0"/>
+      </AxisValue>
+      <AxisValue index="1" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="259"/>  <!-- Light -->
+        <NominalValue value="300.0"/>
+        <RangeMinValue value="200.0"/>
+        <RangeMaxValue value="349.0"/>
+      </AxisValue>
+      <AxisValue index="2" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="260"/>  <!-- DemiLight -->
+        <NominalValue value="350.0"/>
+        <RangeMinValue value="350.0"/>
+        <RangeMaxValue value="399.0"/>
+      </AxisValue>
+      <AxisValue index="3" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="2"/>  <!-- ElidableAxisValueName -->
+        <ValueNameID value="261"/>  <!-- Regular -->
+        <NominalValue value="400.0"/>
+        <RangeMinValue value="400.0"/>
+        <RangeMaxValue value="499.0"/>
+      </AxisValue>
+      <AxisValue index="4" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="262"/>  <!-- Medium -->
+        <NominalValue value="500.0"/>
+        <RangeMinValue value="500.0"/>
+        <RangeMaxValue value="650.0"/>
+      </AxisValue>
+      <AxisValue index="5" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="263"/>  <!-- Bold -->
+        <NominalValue value="700.0"/>
+        <RangeMinValue value="650.0"/>
+        <RangeMaxValue value="800.0"/>
+      </AxisValue>
+      <AxisValue index="6" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="264"/>  <!-- Black -->
+        <NominalValue value="900.0"/>
+        <RangeMinValue value="800.0"/>
+        <RangeMaxValue value="900.0"/>
+      </AxisValue>
+    </AxisValueArray>
+    <ElidedFallbackNameID value="256"/>  <!-- Regular -->
+  </STAT>
+
+  <VORG>
+    <majorVersion value="1"/>
+    <minorVersion value="0"/>
+    <defaultVertOriginY value="880"/>
+    <numVertOriginYMetrics value="0"/>
+  </VORG>
+
+  <VVAR>
+    <Version value="0x00010000"/>
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=1 -->
+        <!-- RegionCount=0 -->
+      </VarRegionList>
+      <!-- VarDataCount=1 -->
+      <VarData index="0">
+        <!-- ItemCount=1 -->
+        <NumShorts value="0"/>
+        <!-- VarRegionCount=0 -->
+        <Item index="0" value="[]"/>
+      </VarData>
+    </VarStore>
+    <AdvHeightMap>
+      <Map glyph=".notdef" outer="0" inner="0"/>
+      <Map glyph="hyphen" outer="0" inner="0"/>
+    </AdvHeightMap>
+    <VOrgMap>
+      <Map glyph=".notdef" outer="0" inner="0"/>
+      <Map glyph="hyphen" outer="0" inner="0"/>
+    </VOrgMap>
+  </VVAR>
+
+  <avar>
+    <version major="1" minor="0"/>
+    <segment axis="wght">
+      <mapping from="-1.0" to="-1.0"/>
+      <mapping from="0.0" to="0.0"/>
+      <mapping from="0.25" to="0.16"/>
+      <mapping from="0.3125" to="0.32"/>
+      <mapping from="0.375" to="0.39"/>
+      <mapping from="0.5" to="0.56"/>
+      <mapping from="0.75" to="0.78"/>
+      <mapping from="1.0" to="1.0"/>
+    </segment>
+  </avar>
+
+  <fvar>
+
+    <!-- Weight -->
+    <Axis>
+      <AxisTag>wght</AxisTag>
+      <Flags>0x0</Flags>
+      <MinValue>100.0</MinValue>
+      <DefaultValue>100.0</DefaultValue>
+      <MaxValue>900.0</MaxValue>
+      <AxisNameID>265</AxisNameID>
+    </Axis>
+
+    <!-- Thin -->
+    <!-- PostScript: NotoSansSC-Thin -->
+    <NamedInstance flags="0x0" postscriptNameID="267" subfamilyNameID="266">
+      <coord axis="wght" value="100.0"/>
+    </NamedInstance>
+
+    <!-- Light -->
+    <!-- PostScript: NotoSansSC-Light -->
+    <NamedInstance flags="0x0" postscriptNameID="269" subfamilyNameID="268">
+      <coord axis="wght" value="300.0"/>
+    </NamedInstance>
+
+    <!-- DemiLight -->
+    <!-- PostScript: NotoSansSC-DemiLight -->
+    <NamedInstance flags="0x0" postscriptNameID="271" subfamilyNameID="270">
+      <coord axis="wght" value="350.0"/>
+    </NamedInstance>
+
+    <!-- Regular -->
+    <!-- PostScript: NotoSansSC-Regular -->
+    <NamedInstance flags="0x0" postscriptNameID="273" subfamilyNameID="272">
+      <coord axis="wght" value="400.0"/>
+    </NamedInstance>
+
+    <!-- Medium -->
+    <!-- PostScript: NotoSansSC-Medium -->
+    <NamedInstance flags="0x0" postscriptNameID="275" subfamilyNameID="274">
+      <coord axis="wght" value="500.0"/>
+    </NamedInstance>
+
+    <!-- Bold -->
+    <!-- PostScript: NotoSansSC-Bold -->
+    <NamedInstance flags="0x0" postscriptNameID="277" subfamilyNameID="276">
+      <coord axis="wght" value="700.0"/>
+    </NamedInstance>
+
+    <!-- Black -->
+    <!-- PostScript: NotoSansSC-Black -->
+    <NamedInstance flags="0x0" postscriptNameID="279" subfamilyNameID="278">
+      <coord axis="wght" value="900.0"/>
+    </NamedInstance>
+  </fvar>
+
+  <vhea>
+    <tableVersion value="0x00011000"/>
+    <ascent value="500"/>
+    <descent value="-500"/>
+    <lineGap value="0"/>
+    <advanceHeightMax value="3000"/>
+    <minTopSideBearing value="-172"/>
+    <minBottomSideBearing value="-648"/>
+    <yMaxExtent value="2930"/>
+    <caretSlopeRise value="0"/>
+    <caretSlopeRun value="1"/>
+    <caretOffset value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <reserved4 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfVMetrics value="1"/>
+  </vhea>
+
+  <vmtx>
+    <mtx name=".notdef" height="1000" tsb="0"/>
+    <mtx name="hyphen" height="1000" tsb="589"/>
+  </vmtx>
+
+</ttFont>

Tests/varLib/instancer/data/CFF2Instancer-VF-2.ttx

@@ -0,0 +1,615 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="OTTO" ttLibVersion="4.51">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="A"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="1.002"/>
+    <checkSumAdjustment value="0x3580d06e"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00000011"/>
+    <unitsPerEm value="1000"/>
+    <created value="Thu Sep 15 20:38:06 2022"/>
+    <modified value="Thu Sep 15 20:38:06 2022"/>
+    <xMin value="20"/>
+    <yMin value="0"/>
+    <xMax value="376"/>
+    <yMax value="700"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="6"/>
+    <fontDirectionHint value="2"/>
+    <indexToLocFormat value="0"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="0x00010000"/>
+    <ascent value="1000"/>
+    <descent value="-200"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="500"/>
+    <minLeftSideBearing value="20"/>
+    <minRightSideBearing value="20"/>
+    <xMaxExtent value="376"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="2"/>
+  </hhea>
+
+  <maxp>
+    <tableVersion value="0x5000"/>
+    <numGlyphs value="2"/>
+  </maxp>
+
+  <OS_2>
+    <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
+         will be recalculated by the compiler -->
+    <version value="4"/>
+    <xAvgCharWidth value="379"/>
+    <usWeightClass value="100"/>
+    <usWidthClass value="1"/>
+    <fsType value="00000000 00000100"/>
+    <ySubscriptXSize value="650"/>
+    <ySubscriptYSize value="600"/>
+    <ySubscriptXOffset value="0"/>
+    <ySubscriptYOffset value="75"/>
+    <ySuperscriptXSize value="650"/>
+    <ySuperscriptYSize value="600"/>
+    <ySuperscriptXOffset value="0"/>
+    <ySuperscriptYOffset value="350"/>
+    <yStrikeoutSize value="50"/>
+    <yStrikeoutPosition value="300"/>
+    <sFamilyClass value="0"/>
+    <panose>
+      <bFamilyType value="0"/>
+      <bSerifStyle value="0"/>
+      <bWeight value="0"/>
+      <bProportion value="0"/>
+      <bContrast value="0"/>
+      <bStrokeVariation value="0"/>
+      <bArmStyle value="0"/>
+      <bLetterForm value="0"/>
+      <bMidline value="0"/>
+      <bXHeight value="0"/>
+    </panose>
+    <ulUnicodeRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulUnicodeRange2 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
+    <achVendID value="LTTR"/>
+    <fsSelection value="00000000 01000000"/>
+    <usFirstCharIndex value="65"/>
+    <usLastCharIndex value="65"/>
+    <sTypoAscender value="700"/>
+    <sTypoDescender value="-200"/>
+    <sTypoLineGap value="300"/>
+    <usWinAscent value="1000"/>
+    <usWinDescent value="200"/>
+    <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="500"/>
+    <sCapHeight value="700"/>
+    <usDefaultChar value="0"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="2"/>
+  </OS_2>
+
+  <hmtx>
+    <mtx name=".notdef" width="500" lsb="50"/>
+    <mtx name="A" width="396" lsb="20"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="0" platEncID="3" language="0">
+      <map code="0x41" name="A"/><!-- LATIN CAPITAL LETTER A -->
+    </cmap_format_4>
+    <cmap_format_4 platformID="3" platEncID="1" language="0">
+      <map code="0x41" name="A"/><!-- LATIN CAPITAL LETTER A -->
+    </cmap_format_4>
+  </cmap>
+
+  <name>
+    <namerecord nameID="0" platformID="3" platEncID="1" langID="0x409">
+      License same as MutatorMath. BSD 3-clause. [test-token: C]
+    </namerecord>
+    <namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
+      1.002;LTTR;MutatorMathTest-LightCondensed
+    </namerecord>
+    <namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
+      MutatorMathTest LightCondensed
+    </namerecord>
+    <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
+      Version 1.002
+    </namerecord>
+    <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
+      MutatorMathTest-LightCondensed
+    </namerecord>
+    <namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
+      Width
+    </namerecord>
+    <namerecord nameID="257" platformID="3" platEncID="1" langID="0x409">
+      Weight
+    </namerecord>
+    <namerecord nameID="258" platformID="3" platEncID="1" langID="0x409">
+      width
+    </namerecord>
+    <namerecord nameID="259" platformID="3" platEncID="1" langID="0x409">
+      weight
+    </namerecord>
+  </name>
+
+  <post>
+    <formatType value="3.0"/>
+    <italicAngle value="0.0"/>
+    <underlinePosition value="-75"/>
+    <underlineThickness value="50"/>
+    <isFixedPitch value="0"/>
+    <minMemType42 value="0"/>
+    <maxMemType42 value="0"/>
+    <minMemType1 value="0"/>
+    <maxMemType1 value="0"/>
+  </post>
+
+  <CFF2>
+    <major value="2"/>
+    <minor value="0"/>
+    <CFFFont name="CFF2Font">
+      <FontMatrix value="0.001 0 0 0.001 0 0"/>
+      <FDArray>
+        <FontDict index="0">
+          <Private>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <LanguageGroup value="0"/>
+            <ExpansionFactor value="0.06"/>
+            <Subrs>
+              <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+              <CharString index="0">
+                1 blend
+                hlineto
+              </CharString>
+              <CharString index="1">
+                2 blend
+                rmoveto
+              </CharString>
+              <CharString index="2">
+                3 blend
+                hlineto
+              </CharString>
+              <CharString index="3">
+                1 blend
+                hmoveto
+              </CharString>
+              <CharString index="4">
+                0 100 0 2 blend
+                rlineto
+              </CharString>
+              <CharString index="5">
+                1 vsindex
+                20 30 -30 0 -104 callsubr
+                40 7 220 63 -107 callsubr
+                140 700 375 -56 -169 -103 callsubr
+                -35 -7 -195 -43 -107 callsubr
+                -90 -536 -235 96 79 60 -144 -60 -106 callsubr
+                250 36 -250 450 220 -190 -6 174 16 -450 -220 190 -105 callsubr
+                257 -200 585 23 -275 -54 -130 44 -106 callsubr
+                44 9 296 121 -107 callsubr
+                -145 700 -375 29 151 -103 callsubr
+                -39 -9 -281 -121 -107 callsubr
+                -17 -39 15 -73 5 3 -221 -3 -106 callsubr
+                47 39 -47 3 223 147 -3 221 3 -3 -223 -147 -105 callsubr
+              </CharString>
+            </Subrs>
+          </Private>
+        </FontDict>
+      </FDArray>
+      <CharStrings>
+        <CharString name=".notdef">
+        </CharString>
+        <CharString name="A">
+          -102 callsubr
+        </CharString>
+      </CharStrings>
+      <VarStore Format="1">
+        <Format value="1"/>
+        <VarRegionList>
+          <!-- RegionAxisCount=2 -->
+          <!-- RegionCount=8 -->
+          <Region index="0">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.0"/>
+              <EndCoord value="0.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="1">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.0"/>
+              <EndCoord value="0.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.63574"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="2">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.0"/>
+              <EndCoord value="0.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.63574"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="3">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.63574"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="4">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.63574"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="5">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.5691"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.63574"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="6">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="0.0"/>
+              <EndCoord value="0.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+          <Region index="7">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+            <VarRegionAxis index="1">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+        </VarRegionList>
+        <!-- VarDataCount=5 -->
+        <VarData index="0">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=6 -->
+          <VarRegionIndex index="0" value="0"/>
+          <VarRegionIndex index="1" value="1"/>
+          <VarRegionIndex index="2" value="2"/>
+          <VarRegionIndex index="3" value="3"/>
+          <VarRegionIndex index="4" value="4"/>
+          <VarRegionIndex index="5" value="5"/>
+        </VarData>
+        <VarData index="1">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=3 -->
+          <VarRegionIndex index="0" value="0"/>
+          <VarRegionIndex index="1" value="6"/>
+          <VarRegionIndex index="2" value="7"/>
+        </VarData>
+        <VarData index="2">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=4 -->
+          <VarRegionIndex index="0" value="0"/>
+          <VarRegionIndex index="1" value="1"/>
+          <VarRegionIndex index="2" value="2"/>
+          <VarRegionIndex index="3" value="7"/>
+        </VarData>
+        <VarData index="3">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=4 -->
+          <VarRegionIndex index="0" value="0"/>
+          <VarRegionIndex index="1" value="6"/>
+          <VarRegionIndex index="2" value="7"/>
+          <VarRegionIndex index="3" value="3"/>
+        </VarData>
+        <VarData index="4">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=5 -->
+          <VarRegionIndex index="0" value="0"/>
+          <VarRegionIndex index="1" value="6"/>
+          <VarRegionIndex index="2" value="7"/>
+          <VarRegionIndex index="3" value="3"/>
+          <VarRegionIndex index="4" value="5"/>
+        </VarData>
+      </VarStore>
+    </CFFFont>
+
+    <GlobalSubrs>
+      <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+    </GlobalSubrs>
+  </CFF2>
+
+  <GPOS>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=1 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GPOS>
+
+  <GSUB>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=1 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GSUB>
+
+  <HVAR>
+    <Version value="0x00010000"/>
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=2 -->
+        <!-- RegionCount=3 -->
+        <Region index="0">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+          <VarRegionAxis index="1">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="0.0"/>
+            <EndCoord value="0.0"/>
+          </VarRegionAxis>
+        </Region>
+        <Region index="1">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="0.0"/>
+            <EndCoord value="0.0"/>
+          </VarRegionAxis>
+          <VarRegionAxis index="1">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+        </Region>
+        <Region index="2">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+          <VarRegionAxis index="1">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+        </Region>
+      </VarRegionList>
+      <!-- VarDataCount=2 -->
+      <VarData index="0">
+        <!-- ItemCount=1 -->
+        <NumShorts value="0"/>
+        <!-- VarRegionCount=0 -->
+        <Item index="0" value="[]"/>
+      </VarData>
+      <VarData index="1">
+        <!-- ItemCount=1 -->
+        <NumShorts value="3"/>
+        <!-- VarRegionCount=3 -->
+        <VarRegionIndex index="0" value="0"/>
+        <VarRegionIndex index="1" value="1"/>
+        <VarRegionIndex index="2" value="2"/>
+        <Item index="0" value="[794, 344, -244]"/>
+      </VarData>
+    </VarStore>
+    <AdvWidthMap>
+      <Map glyph=".notdef" outer="0" inner="0"/>
+      <Map glyph="A" outer="1" inner="0"/>
+    </AdvWidthMap>
+  </HVAR>
+
+  <MVAR>
+    <Version value="0x00010000"/>
+    <Reserved value="0"/>
+    <ValueRecordSize value="8"/>
+    <!-- ValueRecordCount=3 -->
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=2 -->
+        <!-- RegionCount=3 -->
+        <Region index="0">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+          <VarRegionAxis index="1">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="0.0"/>
+            <EndCoord value="0.0"/>
+          </VarRegionAxis>
+        </Region>
+        <Region index="1">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="0.0"/>
+            <EndCoord value="0.0"/>
+          </VarRegionAxis>
+          <VarRegionAxis index="1">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+        </Region>
+        <Region index="2">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+          <VarRegionAxis index="1">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+        </Region>
+      </VarRegionList>
+      <!-- VarDataCount=1 -->
+      <VarData index="0">
+        <!-- ItemCount=2 -->
+        <NumShorts value="0"/>
+        <!-- VarRegionCount=1 -->
+        <VarRegionIndex index="0" value="1"/>
+        <Item index="0" value="[-100]"/>
+        <Item index="1" value="[100]"/>
+      </VarData>
+    </VarStore>
+    <ValueRecord index="0">
+      <ValueTag value="cpht"/>
+      <VarIdx value="1"/>
+    </ValueRecord>
+    <ValueRecord index="1">
+      <ValueTag value="hasc"/>
+      <VarIdx value="1"/>
+    </ValueRecord>
+    <ValueRecord index="2">
+      <ValueTag value="hlgp"/>
+      <VarIdx value="0"/>
+    </ValueRecord>
+  </MVAR>
+
+  <STAT>
+    <Version value="0x00010001"/>
+    <DesignAxisRecordSize value="8"/>
+    <!-- DesignAxisCount=2 -->
+    <DesignAxisRecord>
+      <Axis index="0">
+        <AxisTag value="wdth"/>
+        <AxisNameID value="258"/>  <!-- width -->
+        <AxisOrdering value="0"/>
+      </Axis>
+      <Axis index="1">
+        <AxisTag value="wght"/>
+        <AxisNameID value="259"/>  <!-- weight -->
+        <AxisOrdering value="1"/>
+      </Axis>
+    </DesignAxisRecord>
+    <!-- AxisValueCount=0 -->
+    <ElidedFallbackNameID value="2"/>  <!-- Regular -->
+  </STAT>
+
+  <fvar>
+
+    <!-- Width -->
+    <Axis>
+      <AxisTag>wdth</AxisTag>
+      <Flags>0x0</Flags>
+      <MinValue>0.0</MinValue>
+      <DefaultValue>0.0</DefaultValue>
+      <MaxValue>1000.0</MaxValue>
+      <AxisNameID>256</AxisNameID>
+    </Axis>
+
+    <!-- Weight -->
+    <Axis>
+      <AxisTag>wght</AxisTag>
+      <Flags>0x0</Flags>
+      <MinValue>100.0</MinValue>
+      <DefaultValue>100.0</DefaultValue>
+      <MaxValue>900.0</MaxValue>
+      <AxisNameID>257</AxisNameID>
+    </Axis>
+  </fvar>
+
+</ttFont>

Tests/varLib/instancer/data/CFF2Instancer-VF-3.ttx

@@ -0,0 +1,648 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="OTTO" ttLibVersion="4.51">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="uni6868"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="2.004"/>
+    <checkSumAdjustment value="0x7377173c"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00000011"/>
+    <unitsPerEm value="1000"/>
+    <created value="Thu Apr 29 17:39:47 2021"/>
+    <modified value="Thu Apr 29 08:51:43 2021"/>
+    <xMin value="46"/>
+    <yMin value="-72"/>
+    <xMax value="960"/>
+    <yMax value="833"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="3"/>
+    <fontDirectionHint value="2"/>
+    <indexToLocFormat value="0"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="0x00010000"/>
+    <ascent value="1160"/>
+    <descent value="-288"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="1000"/>
+    <minLeftSideBearing value="46"/>
+    <minRightSideBearing value="40"/>
+    <xMaxExtent value="960"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="1"/>
+  </hhea>
+
+  <maxp>
+    <tableVersion value="0x5000"/>
+    <numGlyphs value="2"/>
+  </maxp>
+
+  <OS_2>
+    <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
+         will be recalculated by the compiler -->
+    <version value="3"/>
+    <xAvgCharWidth value="989"/>
+    <usWeightClass value="100"/>
+    <usWidthClass value="5"/>
+    <fsType value="00000000 00000000"/>
+    <ySubscriptXSize value="650"/>
+    <ySubscriptYSize value="600"/>
+    <ySubscriptXOffset value="0"/>
+    <ySubscriptYOffset value="75"/>
+    <ySuperscriptXSize value="650"/>
+    <ySuperscriptYSize value="600"/>
+    <ySuperscriptXOffset value="0"/>
+    <ySuperscriptYOffset value="350"/>
+    <yStrikeoutSize value="50"/>
+    <yStrikeoutPosition value="325"/>
+    <sFamilyClass value="0"/>
+    <panose>
+      <bFamilyType value="2"/>
+      <bSerifStyle value="11"/>
+      <bWeight value="2"/>
+      <bProportion value="0"/>
+      <bContrast value="0"/>
+      <bStrokeVariation value="0"/>
+      <bArmStyle value="0"/>
+      <bLetterForm value="0"/>
+      <bMidline value="0"/>
+      <bXHeight value="0"/>
+    </panose>
+    <ulUnicodeRange1 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange2 value="00001000 00000000 00000000 00000000"/>
+    <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
+    <achVendID value="ADBO"/>
+    <fsSelection value="00000000 00000000"/>
+    <usFirstCharIndex value="26728"/>
+    <usLastCharIndex value="26728"/>
+    <sTypoAscender value="880"/>
+    <sTypoDescender value="-120"/>
+    <sTypoLineGap value="0"/>
+    <usWinAscent value="1160"/>
+    <usWinDescent value="288"/>
+    <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="543"/>
+    <sCapHeight value="733"/>
+    <usDefaultChar value="0"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="6"/>
+  </OS_2>
+
+  <hmtx>
+    <mtx name=".notdef" width="1000" lsb="100"/>
+    <mtx name="uni6868" width="1000" lsb="46"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="0" platEncID="3" language="0">
+      <map code="0x6868" name="uni6868"/><!-- CJK UNIFIED IDEOGRAPH-6868 -->
+    </cmap_format_4>
+    <cmap_format_4 platformID="3" platEncID="1" language="0">
+      <map code="0x6868" name="uni6868"/><!-- CJK UNIFIED IDEOGRAPH-6868 -->
+    </cmap_format_4>
+  </cmap>
+
+  <name>
+    <namerecord nameID="0" platformID="3" platEncID="1" langID="0x409">
+      © 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
+    </namerecord>
+    <namerecord nameID="1" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
+      2.004;ADBO;NotoSansSC-Thin;ADOBE
+    </namerecord>
+    <namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
+      Version 2.004;hotconv 1.0.118;makeotfexe 2.5.65603
+    </namerecord>
+    <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Thin
+    </namerecord>
+    <namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="258" platformID="3" platEncID="1" langID="0x409">
+      Thin
+    </namerecord>
+    <namerecord nameID="259" platformID="3" platEncID="1" langID="0x409">
+      Light
+    </namerecord>
+    <namerecord nameID="260" platformID="3" platEncID="1" langID="0x409">
+      DemiLight
+    </namerecord>
+    <namerecord nameID="261" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="262" platformID="3" platEncID="1" langID="0x409">
+      Medium
+    </namerecord>
+    <namerecord nameID="263" platformID="3" platEncID="1" langID="0x409">
+      Bold
+    </namerecord>
+    <namerecord nameID="264" platformID="3" platEncID="1" langID="0x409">
+      Black
+    </namerecord>
+    <namerecord nameID="265" platformID="3" platEncID="1" langID="0x409">
+      Weight
+    </namerecord>
+    <namerecord nameID="266" platformID="3" platEncID="1" langID="0x409">
+      Thin
+    </namerecord>
+    <namerecord nameID="267" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Thin
+    </namerecord>
+    <namerecord nameID="268" platformID="3" platEncID="1" langID="0x409">
+      Light
+    </namerecord>
+    <namerecord nameID="269" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Light
+    </namerecord>
+    <namerecord nameID="270" platformID="3" platEncID="1" langID="0x409">
+      DemiLight
+    </namerecord>
+    <namerecord nameID="271" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-DemiLight
+    </namerecord>
+    <namerecord nameID="272" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="273" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Regular
+    </namerecord>
+    <namerecord nameID="274" platformID="3" platEncID="1" langID="0x409">
+      Medium
+    </namerecord>
+    <namerecord nameID="275" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Medium
+    </namerecord>
+    <namerecord nameID="276" platformID="3" platEncID="1" langID="0x409">
+      Bold
+    </namerecord>
+    <namerecord nameID="277" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Bold
+    </namerecord>
+    <namerecord nameID="278" platformID="3" platEncID="1" langID="0x409">
+      Black
+    </namerecord>
+    <namerecord nameID="279" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Black
+    </namerecord>
+  </name>
+
+  <post>
+    <formatType value="3.0"/>
+    <italicAngle value="0.0"/>
+    <underlinePosition value="-125"/>
+    <underlineThickness value="50"/>
+    <isFixedPitch value="0"/>
+    <minMemType42 value="0"/>
+    <maxMemType42 value="0"/>
+    <minMemType1 value="0"/>
+    <maxMemType1 value="0"/>
+  </post>
+
+  <CFF2>
+    <major value="2"/>
+    <minor value="0"/>
+    <CFFFont name="CFF2Font">
+      <FontMatrix value="0.001 0 0 0.001 0 0"/>
+      <FDSelect format="0"/>
+      <FDArray>
+        <FontDict index="0">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="1"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+        <FontDict index="1">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="1"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+      </FDArray>
+      <CharStrings>
+        <CharString name=".notdef" fdSelectIndex="0">
+        </CharString>
+        <CharString name="uni6868" fdSelectIndex="1">
+          69 271 -16 33 2 blend
+          rmoveto
+          -30 856 30 -95 40 95 3 blend
+          vlineto
+          -443 103 -81 -61 2 blend
+          rmoveto
+          -446 30 446 5 119 -5 3 blend
+          vlineto
+          -62 -110 -125 -2 2 blend
+          rmoveto
+          -87 -119 -170 -109 -147 -49 7 -5 9 -11 5 -9 145 54 174 111 90 124 11 40 23 37 5 14 24 -25 35 -45 16 -26 1 -4 -29 -15 1 -12 18 blend
+          rrcurveto
+          71 12 39 33 2 blend
+          rmoveto
+          -27 -13 -86 -39 2 blend
+          rlineto
+          88 -127 173 -108 158 -50 5 9 9 10 7 6 -159 45 -170 104 -84 124 7 22 -25 14 -16 1 16 28 35 46 25 23 19 -10 19 -35 6 -50 18 blend
+          rrcurveto
+          -451 501 -120 18 2 blend
+          rmoveto
+          42 -51 44 -70 16 -45 -11 5 -10 8 -3 5 6 blend
+          rrcurveto
+          28 15 -17 44 -44 68 -42 50 86 50 3 -4 6 -9 9 -8 8 blend
+          rlinecurve
+          183 56 -86 -8 2 blend
+          rmoveto
+          -472 28 472 -50 111 50 3 blend
+          vlineto
+          -273 -379 -84 31 2 blend
+          rmoveto
+          16 -26 70 33 93 45 88 42 42 -101 -2 8 -13 5 -16 7 8 blend
+          rlinecurve
+          -7 26 -97 -46 -98 -46 -65 -32 87 9 -3 7 -3 5 7 blend
+          -28 rlinecurve
+          467 173 19 -103 2 blend
+          rmoveto
+          59 -44 67 -64 31 -43 -24 2 -24 5 -14 5 6 blend
+          rrcurveto
+          26 17 -33 43 -67 63 -58 43 84 51 13 -5 22 -8 22 -4 8 blend
+          rlinecurve
+          8 104 -63 31 2 blend
+          rmoveto
+          -29 340 29 -90 -29 90 3 blend
+          vlineto
+          -291 89 -3 -2 2 blend
+          rmoveto
+          -33 -81 -82 -84 -90 -50 7 -5 9 -11 4 -6 94 52 84 89 38 88 -6 12 -3 4 6 4 18 -19 29 -37 16 -23 3 6 14 7 25 9 18 blend
+          rrcurveto
+          251 -81 -122 39 2 blend
+          rmoveto
+          -7 -14 1 blend
+          vlineto
+          -76 -215 -200 -89 -239 -37 6 -7 8 -12 4 -7 243 43 202 90 84 231 17 41 27 6 11 5 19 -20 30 -48 10 -27 -1 4 -4 21 -1 1 18 blend
+          rrcurveto
+          -17 12 -7 -2 -71 33 -17 -2 4 blend
+          rlineto
+        </CharString>
+      </CharStrings>
+      <VarStore Format="1">
+        <Format value="1"/>
+        <VarRegionList>
+          <!-- RegionAxisCount=1 -->
+          <!-- RegionCount=1 -->
+          <Region index="0">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+        </VarRegionList>
+        <!-- VarDataCount=1 -->
+        <VarData index="0">
+          <!-- ItemCount=0 -->
+          <NumShorts value="0"/>
+          <!-- VarRegionCount=1 -->
+          <VarRegionIndex index="0" value="0"/>
+        </VarData>
+      </VarStore>
+    </CFFFont>
+
+    <GlobalSubrs>
+      <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+    </GlobalSubrs>
+  </CFF2>
+
+  <GPOS>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=1 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GPOS>
+
+  <GSUB>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=6 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="cyrl"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="2">
+        <ScriptTag value="grek"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="3">
+        <ScriptTag value="hani"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="4">
+        <ScriptTag value="kana"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="5">
+        <ScriptTag value="latn"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GSUB>
+
+  <HVAR>
+    <Version value="0x00010000"/>
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=1 -->
+        <!-- RegionCount=0 -->
+      </VarRegionList>
+      <!-- VarDataCount=1 -->
+      <VarData index="0">
+        <!-- ItemCount=2 -->
+        <NumShorts value="0"/>
+        <!-- VarRegionCount=0 -->
+        <Item index="0" value="[]"/>
+        <Item index="1" value="[]"/>
+      </VarData>
+    </VarStore>
+  </HVAR>
+
+  <STAT>
+    <Version value="0x00010001"/>
+    <DesignAxisRecordSize value="8"/>
+    <!-- DesignAxisCount=1 -->
+    <DesignAxisRecord>
+      <Axis index="0">
+        <AxisTag value="wght"/>
+        <AxisNameID value="265"/>  <!-- Weight -->
+        <AxisOrdering value="0"/>
+      </Axis>
+    </DesignAxisRecord>
+    <!-- AxisValueCount=7 -->
+    <AxisValueArray>
+      <AxisValue index="0" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="258"/>  <!-- Thin -->
+        <NominalValue value="100.0"/>
+        <RangeMinValue value="100.0"/>
+        <RangeMaxValue value="199.0"/>
+      </AxisValue>
+      <AxisValue index="1" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="259"/>  <!-- Light -->
+        <NominalValue value="300.0"/>
+        <RangeMinValue value="200.0"/>
+        <RangeMaxValue value="349.0"/>
+      </AxisValue>
+      <AxisValue index="2" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="260"/>  <!-- DemiLight -->
+        <NominalValue value="350.0"/>
+        <RangeMinValue value="350.0"/>
+        <RangeMaxValue value="399.0"/>
+      </AxisValue>
+      <AxisValue index="3" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="2"/>  <!-- ElidableAxisValueName -->
+        <ValueNameID value="261"/>  <!-- Regular -->
+        <NominalValue value="400.0"/>
+        <RangeMinValue value="400.0"/>
+        <RangeMaxValue value="499.0"/>
+      </AxisValue>
+      <AxisValue index="4" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="262"/>  <!-- Medium -->
+        <NominalValue value="500.0"/>
+        <RangeMinValue value="500.0"/>
+        <RangeMaxValue value="650.0"/>
+      </AxisValue>
+      <AxisValue index="5" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="263"/>  <!-- Bold -->
+        <NominalValue value="700.0"/>
+        <RangeMinValue value="650.0"/>
+        <RangeMaxValue value="800.0"/>
+      </AxisValue>
+      <AxisValue index="6" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="0"/>
+        <ValueNameID value="264"/>  <!-- Black -->
+        <NominalValue value="900.0"/>
+        <RangeMinValue value="800.0"/>
+        <RangeMaxValue value="900.0"/>
+      </AxisValue>
+    </AxisValueArray>
+    <ElidedFallbackNameID value="256"/>  <!-- Regular -->
+  </STAT>
+
+  <VORG>
+    <majorVersion value="1"/>
+    <minorVersion value="0"/>
+    <defaultVertOriginY value="880"/>
+    <numVertOriginYMetrics value="0"/>
+  </VORG>
+
+  <VVAR>
+    <Version value="0x00010000"/>
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=1 -->
+        <!-- RegionCount=0 -->
+      </VarRegionList>
+      <!-- VarDataCount=1 -->
+      <VarData index="0">
+        <!-- ItemCount=1 -->
+        <NumShorts value="0"/>
+        <!-- VarRegionCount=0 -->
+        <Item index="0" value="[]"/>
+      </VarData>
+    </VarStore>
+    <AdvHeightMap>
+      <Map glyph=".notdef" outer="0" inner="0"/>
+      <Map glyph="uni6868" outer="0" inner="0"/>
+    </AdvHeightMap>
+    <VOrgMap>
+      <Map glyph=".notdef" outer="0" inner="0"/>
+      <Map glyph="uni6868" outer="0" inner="0"/>
+    </VOrgMap>
+  </VVAR>
+
+  <avar>
+    <version major="1" minor="0"/>
+    <segment axis="wght">
+      <mapping from="-1.0" to="-1.0"/>
+      <mapping from="0.0" to="0.0"/>
+      <mapping from="0.25" to="0.16"/>
+      <mapping from="0.3125" to="0.32"/>
+      <mapping from="0.375" to="0.39"/>
+      <mapping from="0.5" to="0.56"/>
+      <mapping from="0.75" to="0.78"/>
+      <mapping from="1.0" to="1.0"/>
+    </segment>
+  </avar>
+
+  <fvar>
+
+    <!-- Weight -->
+    <Axis>
+      <AxisTag>wght</AxisTag>
+      <Flags>0x0</Flags>
+      <MinValue>100.0</MinValue>
+      <DefaultValue>100.0</DefaultValue>
+      <MaxValue>900.0</MaxValue>
+      <AxisNameID>265</AxisNameID>
+    </Axis>
+
+    <!-- Thin -->
+    <!-- PostScript: NotoSansSC-Thin -->
+    <NamedInstance flags="0x0" postscriptNameID="267" subfamilyNameID="266">
+      <coord axis="wght" value="100.0"/>
+    </NamedInstance>
+
+    <!-- Light -->
+    <!-- PostScript: NotoSansSC-Light -->
+    <NamedInstance flags="0x0" postscriptNameID="269" subfamilyNameID="268">
+      <coord axis="wght" value="300.0"/>
+    </NamedInstance>
+
+    <!-- DemiLight -->
+    <!-- PostScript: NotoSansSC-DemiLight -->
+    <NamedInstance flags="0x0" postscriptNameID="271" subfamilyNameID="270">
+      <coord axis="wght" value="350.0"/>
+    </NamedInstance>
+
+    <!-- Regular -->
+    <!-- PostScript: NotoSansSC-Regular -->
+    <NamedInstance flags="0x0" postscriptNameID="273" subfamilyNameID="272">
+      <coord axis="wght" value="400.0"/>
+    </NamedInstance>
+
+    <!-- Medium -->
+    <!-- PostScript: NotoSansSC-Medium -->
+    <NamedInstance flags="0x0" postscriptNameID="275" subfamilyNameID="274">
+      <coord axis="wght" value="500.0"/>
+    </NamedInstance>
+
+    <!-- Bold -->
+    <!-- PostScript: NotoSansSC-Bold -->
+    <NamedInstance flags="0x0" postscriptNameID="277" subfamilyNameID="276">
+      <coord axis="wght" value="700.0"/>
+    </NamedInstance>
+
+    <!-- Black -->
+    <!-- PostScript: NotoSansSC-Black -->
+    <NamedInstance flags="0x0" postscriptNameID="279" subfamilyNameID="278">
+      <coord axis="wght" value="900.0"/>
+    </NamedInstance>
+  </fvar>
+
+  <vhea>
+    <tableVersion value="0x00011000"/>
+    <ascent value="500"/>
+    <descent value="-500"/>
+    <lineGap value="0"/>
+    <advanceHeightMax value="1000"/>
+    <minTopSideBearing value="47"/>
+    <minBottomSideBearing value="48"/>
+    <yMaxExtent value="952"/>
+    <caretSlopeRise value="0"/>
+    <caretSlopeRun value="1"/>
+    <caretOffset value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <reserved4 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfVMetrics value="1"/>
+  </vhea>
+
+  <vmtx>
+    <mtx name=".notdef" height="1000" tsb="0"/>
+    <mtx name="uni6868" height="1000" tsb="47"/>
+  </vmtx>
+
+</ttFont>

Tests/varLib/instancer/data/test_results/CFF2Instancer-VF-1-instance-400.ttx

@@ -0,0 +1,476 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="OTTO" ttLibVersion="4.51">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="hyphen"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="2.004"/>
+    <checkSumAdjustment value="0xe123fa9"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00000011"/>
+    <unitsPerEm value="1000"/>
+    <created value="Thu Apr 29 17:39:47 2021"/>
+    <modified value="Tue May 14 20:02:30 2024"/>
+    <xMin value="46"/>
+    <yMin value="245"/>
+    <xMax value="302"/>
+    <yMax value="315"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="3"/>
+    <fontDirectionHint value="2"/>
+    <indexToLocFormat value="0"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="0x00010000"/>
+    <ascent value="1160"/>
+    <descent value="-288"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="1000"/>
+    <minLeftSideBearing value="44"/>
+    <minRightSideBearing value="47"/>
+    <xMaxExtent value="300"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="2"/>
+  </hhea>
+
+  <maxp>
+    <tableVersion value="0x5000"/>
+    <numGlyphs value="2"/>
+  </maxp>
+
+  <OS_2>
+    <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
+         will be recalculated by the compiler -->
+    <version value="3"/>
+    <xAvgCharWidth value="674"/>
+    <usWeightClass value="400"/>
+    <usWidthClass value="5"/>
+    <fsType value="00000000 00000000"/>
+    <ySubscriptXSize value="650"/>
+    <ySubscriptYSize value="600"/>
+    <ySubscriptXOffset value="0"/>
+    <ySubscriptYOffset value="75"/>
+    <ySuperscriptXSize value="650"/>
+    <ySuperscriptYSize value="600"/>
+    <ySuperscriptXOffset value="0"/>
+    <ySuperscriptYOffset value="350"/>
+    <yStrikeoutSize value="50"/>
+    <yStrikeoutPosition value="325"/>
+    <sFamilyClass value="0"/>
+    <panose>
+      <bFamilyType value="2"/>
+      <bSerifStyle value="11"/>
+      <bWeight value="2"/>
+      <bProportion value="0"/>
+      <bContrast value="0"/>
+      <bStrokeVariation value="0"/>
+      <bArmStyle value="0"/>
+      <bLetterForm value="0"/>
+      <bMidline value="0"/>
+      <bXHeight value="0"/>
+    </panose>
+    <ulUnicodeRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulUnicodeRange2 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
+    <achVendID value="ADBO"/>
+    <fsSelection value="00000000 00000000"/>
+    <usFirstCharIndex value="45"/>
+    <usLastCharIndex value="45"/>
+    <sTypoAscender value="880"/>
+    <sTypoDescender value="-120"/>
+    <sTypoLineGap value="0"/>
+    <usWinAscent value="1160"/>
+    <usWinDescent value="288"/>
+    <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="543"/>
+    <sCapHeight value="733"/>
+    <usDefaultChar value="0"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="6"/>
+  </OS_2>
+
+  <hmtx>
+    <mtx name=".notdef" width="1000" lsb="100"/>
+    <mtx name="hyphen" width="347" lsb="44"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="0" platEncID="3" language="0">
+      <map code="0x2d" name="hyphen"/><!-- HYPHEN-MINUS -->
+    </cmap_format_4>
+    <cmap_format_4 platformID="3" platEncID="1" language="0">
+      <map code="0x2d" name="hyphen"/><!-- HYPHEN-MINUS -->
+    </cmap_format_4>
+  </cmap>
+
+  <name>
+    <namerecord nameID="0" platformID="3" platEncID="1" langID="0x409">
+      © 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
+    </namerecord>
+    <namerecord nameID="1" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
+      2.004;ADBO;NotoSansSC-Thin;ADOBE
+    </namerecord>
+    <namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
+      Version 2.004;hotconv 1.0.118;makeotfexe 2.5.65603
+    </namerecord>
+    <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Thin
+    </namerecord>
+    <namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="261" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="265" platformID="3" platEncID="1" langID="0x409">
+      Weight
+    </namerecord>
+  </name>
+
+  <post>
+    <formatType value="3.0"/>
+    <italicAngle value="0.0"/>
+    <underlinePosition value="-125"/>
+    <underlineThickness value="50"/>
+    <isFixedPitch value="0"/>
+    <minMemType42 value="0"/>
+    <maxMemType42 value="0"/>
+    <minMemType1 value="0"/>
+    <maxMemType1 value="0"/>
+  </post>
+
+  <CFF2>
+    <major value="2"/>
+    <minor value="0"/>
+    <CFFFont name="CFF2Font">
+      <FontMatrix value="0.001 0 0 0.001 0 0"/>
+      <FDSelect format="0"/>
+      <FDArray>
+        <FontDict index="0">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="1"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+        <FontDict index="1">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="0"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+      </FDArray>
+      <CharStrings>
+        <CharString name=".notdef" fdSelectIndex="0">
+        </CharString>
+        <CharString name="hyphen" fdSelectIndex="1">
+          46 245 rmoveto
+          256 70 -256 hlineto
+        </CharString>
+      </CharStrings>
+    </CFFFont>
+
+    <GlobalSubrs>
+      <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+    </GlobalSubrs>
+  </CFF2>
+
+  <GPOS>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=6 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="0"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="cyrl"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="1"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="2">
+        <ScriptTag value="grek"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="2"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="3">
+        <ScriptTag value="hani"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="3"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="4">
+        <ScriptTag value="kana"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="4"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="5">
+        <ScriptTag value="latn"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="5"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=6 -->
+      <FeatureRecord index="0">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="1">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="2">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="3">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="4">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+      <FeatureRecord index="5">
+        <FeatureTag value="kern"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=1 -->
+      <Lookup index="0">
+        <LookupType value="2"/>
+        <LookupFlag value="0"/>
+        <!-- SubTableCount=1 -->
+        <PairPos index="0" Format="2">
+          <Coverage>
+            <Glyph value="hyphen"/>
+          </Coverage>
+          <ValueFormat1 value="68"/>
+          <ValueFormat2 value="0"/>
+          <ClassDef1>
+          </ClassDef1>
+          <ClassDef2>
+            <ClassDef glyph="hyphen" class="1"/>
+          </ClassDef2>
+          <!-- Class1Count=1 -->
+          <!-- Class2Count=2 -->
+          <Class1Record index="0">
+            <Class2Record index="0">
+              <Value1 XAdvance="0"/>
+            </Class2Record>
+            <Class2Record index="1">
+              <Value1 XAdvance="0"/>
+            </Class2Record>
+          </Class1Record>
+        </PairPos>
+      </Lookup>
+    </LookupList>
+  </GPOS>
+
+  <GSUB>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=6 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="cyrl"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="2">
+        <ScriptTag value="grek"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="3">
+        <ScriptTag value="hani"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="4">
+        <ScriptTag value="kana"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="5">
+        <ScriptTag value="latn"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GSUB>
+
+  <STAT>
+    <Version value="0x00010001"/>
+    <DesignAxisRecordSize value="8"/>
+    <!-- DesignAxisCount=1 -->
+    <DesignAxisRecord>
+      <Axis index="0">
+        <AxisTag value="wght"/>
+        <AxisNameID value="265"/>  <!-- Weight -->
+        <AxisOrdering value="0"/>
+      </Axis>
+    </DesignAxisRecord>
+    <!-- AxisValueCount=1 -->
+    <AxisValueArray>
+      <AxisValue index="0" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="2"/>  <!-- ElidableAxisValueName -->
+        <ValueNameID value="261"/>  <!-- Regular -->
+        <NominalValue value="400.0"/>
+        <RangeMinValue value="400.0"/>
+        <RangeMaxValue value="499.0"/>
+      </AxisValue>
+    </AxisValueArray>
+    <ElidedFallbackNameID value="256"/>  <!-- Regular -->
+  </STAT>
+
+  <VORG>
+    <majorVersion value="1"/>
+    <minorVersion value="0"/>
+    <defaultVertOriginY value="880"/>
+    <numVertOriginYMetrics value="0"/>
+  </VORG>
+
+  <vhea>
+    <tableVersion value="0x00011000"/>
+    <ascent value="500"/>
+    <descent value="-500"/>
+    <lineGap value="0"/>
+    <advanceHeightMax value="1000"/>
+    <minTopSideBearing value="589"/>
+    <minBottomSideBearing value="341"/>
+    <yMaxExtent value="659"/>
+    <caretSlopeRise value="0"/>
+    <caretSlopeRun value="1"/>
+    <caretOffset value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <reserved4 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfVMetrics value="1"/>
+  </vhea>
+
+  <vmtx>
+    <mtx name=".notdef" height="1000" tsb="0"/>
+    <mtx name="hyphen" height="1000" tsb="589"/>
+  </vmtx>
+
+</ttFont>

Tests/varLib/instancer/data/test_results/CFF2Instancer-VF-2-instance-400.ttx

@@ -0,0 +1,350 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="OTTO" ttLibVersion="4.51">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="A"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="1.002"/>
+    <checkSumAdjustment value="0x1f33d291"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00000011"/>
+    <unitsPerEm value="1000"/>
+    <created value="Thu Sep 15 20:38:06 2022"/>
+    <modified value="Tue May 14 19:31:24 2024"/>
+    <xMin value="9"/>
+    <yMin value="0"/>
+    <xMax value="509"/>
+    <yMax value="738"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="6"/>
+    <fontDirectionHint value="2"/>
+    <indexToLocFormat value="0"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="0x00010000"/>
+    <ascent value="1000"/>
+    <descent value="-200"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="525"/>
+    <minLeftSideBearing value="20"/>
+    <minRightSideBearing value="5"/>
+    <xMaxExtent value="520"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="2"/>
+  </hhea>
+
+  <maxp>
+    <tableVersion value="0x5000"/>
+    <numGlyphs value="2"/>
+  </maxp>
+
+  <OS_2>
+    <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
+         will be recalculated by the compiler -->
+    <version value="4"/>
+    <xAvgCharWidth value="513"/>
+    <usWeightClass value="400"/>
+    <usWidthClass value="1"/>
+    <fsType value="00000000 00000100"/>
+    <ySubscriptXSize value="650"/>
+    <ySubscriptYSize value="600"/>
+    <ySubscriptXOffset value="0"/>
+    <ySubscriptYOffset value="75"/>
+    <ySuperscriptXSize value="650"/>
+    <ySuperscriptYSize value="600"/>
+    <ySuperscriptXOffset value="0"/>
+    <ySuperscriptYOffset value="350"/>
+    <yStrikeoutSize value="50"/>
+    <yStrikeoutPosition value="300"/>
+    <sFamilyClass value="0"/>
+    <panose>
+      <bFamilyType value="0"/>
+      <bSerifStyle value="0"/>
+      <bWeight value="0"/>
+      <bProportion value="0"/>
+      <bContrast value="0"/>
+      <bStrokeVariation value="0"/>
+      <bArmStyle value="0"/>
+      <bLetterForm value="0"/>
+      <bMidline value="0"/>
+      <bXHeight value="0"/>
+    </panose>
+    <ulUnicodeRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulUnicodeRange2 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
+    <achVendID value="LTTR"/>
+    <fsSelection value="00000000 01000000"/>
+    <usFirstCharIndex value="65"/>
+    <usLastCharIndex value="65"/>
+    <sTypoAscender value="738"/>
+    <sTypoDescender value="-200"/>
+    <sTypoLineGap value="263"/>
+    <usWinAscent value="1000"/>
+    <usWinDescent value="200"/>
+    <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="500"/>
+    <sCapHeight value="738"/>
+    <usDefaultChar value="0"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="2"/>
+  </OS_2>
+
+  <hmtx>
+    <mtx name=".notdef" width="500" lsb="50"/>
+    <mtx name="A" width="525" lsb="20"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="0" platEncID="3" language="0">
+      <map code="0x41" name="A"/><!-- LATIN CAPITAL LETTER A -->
+    </cmap_format_4>
+    <cmap_format_4 platformID="3" platEncID="1" language="0">
+      <map code="0x41" name="A"/><!-- LATIN CAPITAL LETTER A -->
+    </cmap_format_4>
+  </cmap>
+
+  <name>
+    <namerecord nameID="0" platformID="3" platEncID="1" langID="0x409">
+      License same as MutatorMath. BSD 3-clause. [test-token: C]
+    </namerecord>
+    <namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
+      1.002;LTTR;MutatorMathTest-LightCondensed
+    </namerecord>
+    <namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
+      MutatorMathTest LightCondensed
+    </namerecord>
+    <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
+      Version 1.002
+    </namerecord>
+    <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
+      MutatorMathTest-LightCondensed
+    </namerecord>
+    <namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
+      Width
+    </namerecord>
+    <namerecord nameID="258" platformID="3" platEncID="1" langID="0x409">
+      width
+    </namerecord>
+    <namerecord nameID="259" platformID="3" platEncID="1" langID="0x409">
+      weight
+    </namerecord>
+  </name>
+
+  <post>
+    <formatType value="3.0"/>
+    <italicAngle value="0.0"/>
+    <underlinePosition value="-75"/>
+    <underlineThickness value="50"/>
+    <isFixedPitch value="0"/>
+    <minMemType42 value="0"/>
+    <maxMemType42 value="0"/>
+    <minMemType1 value="0"/>
+    <maxMemType1 value="0"/>
+  </post>
+
+  <CFF2>
+    <major value="2"/>
+    <minor value="0"/>
+    <CFFFont name="CFF2Font">
+      <FontMatrix value="0.001 0 0 0.001 0 0"/>
+      <FDArray>
+        <FontDict index="0">
+          <Private>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <LanguageGroup value="0"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+      </FDArray>
+      <CharStrings>
+        <CharString name=".notdef">
+        </CharString>
+        <CharString name="A">
+          9 30 1 blend
+          hmoveto
+          122 31 1 blend
+          hlineto
+          119 738 312 0 2 blend
+          rlineto
+          -108 -23 1 blend
+          hlineto
+          -54 -590 -205 38 2 blend
+          rmoveto
+          332 101 -332 379 0 -379 3 blend
+          hlineto
+          266 -249 482 -37 2 blend
+          rmoveto
+          155 54 1 blend
+          hlineto
+          -134 738 -318 0 2 blend
+          rlineto
+          -144 -54 1 blend
+          hlineto
+          -44 -122 17 2 2 blend
+          rmoveto
+          131 122 -131 58 -2 -58 3 blend
+          hlineto
+        </CharString>
+      </CharStrings>
+      <VarStore Format="1">
+        <Format value="1"/>
+        <VarRegionList>
+          <!-- RegionAxisCount=1 -->
+          <!-- RegionCount=1 -->
+          <Region index="0">
+            <VarRegionAxis index="0">
+              <StartCoord value="0.0"/>
+              <PeakCoord value="1.0"/>
+              <EndCoord value="1.0"/>
+            </VarRegionAxis>
+          </Region>
+        </VarRegionList>
+        <!-- VarDataCount=1 -->
+        <VarData index="0">
+          <!-- ItemCount=0 -->
+          <NumShorts value="1"/>
+          <!-- VarRegionCount=1 -->
+          <VarRegionIndex index="0" value="0"/>
+        </VarData>
+      </VarStore>
+    </CFFFont>
+
+    <GlobalSubrs>
+      <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+    </GlobalSubrs>
+  </CFF2>
+
+  <GPOS>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=1 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GPOS>
+
+  <GSUB>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=1 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GSUB>
+
+  <HVAR>
+    <Version value="0x00010000"/>
+    <VarStore Format="1">
+      <Format value="1"/>
+      <VarRegionList>
+        <!-- RegionAxisCount=1 -->
+        <!-- RegionCount=1 -->
+        <Region index="0">
+          <VarRegionAxis index="0">
+            <StartCoord value="0.0"/>
+            <PeakCoord value="1.0"/>
+            <EndCoord value="1.0"/>
+          </VarRegionAxis>
+        </Region>
+      </VarRegionList>
+      <!-- VarDataCount=1 -->
+      <VarData index="0">
+        <!-- ItemCount=2 -->
+        <NumShorts value="1"/>
+        <!-- VarRegionCount=1 -->
+        <VarRegionIndex index="0" value="0"/>
+        <Item index="0" value="[0]"/>
+        <Item index="1" value="[703]"/>
+      </VarData>
+    </VarStore>
+    <AdvWidthMap>
+      <Map glyph=".notdef" outer="0" inner="0"/>
+      <Map glyph="A" outer="0" inner="1"/>
+    </AdvWidthMap>
+  </HVAR>
+
+  <STAT>
+    <Version value="0x00010001"/>
+    <DesignAxisRecordSize value="8"/>
+    <!-- DesignAxisCount=2 -->
+    <DesignAxisRecord>
+      <Axis index="0">
+        <AxisTag value="wdth"/>
+        <AxisNameID value="258"/>  <!-- width -->
+        <AxisOrdering value="0"/>
+      </Axis>
+      <Axis index="1">
+        <AxisTag value="wght"/>
+        <AxisNameID value="259"/>  <!-- weight -->
+        <AxisOrdering value="1"/>
+      </Axis>
+    </DesignAxisRecord>
+    <!-- AxisValueCount=0 -->
+    <ElidedFallbackNameID value="2"/>  <!-- Regular -->
+  </STAT>
+
+  <fvar>
+
+    <!-- Width -->
+    <Axis>
+      <AxisTag>wdth</AxisTag>
+      <Flags>0x0</Flags>
+      <MinValue>0.0</MinValue>
+      <DefaultValue>0.0</DefaultValue>
+      <MaxValue>1000.0</MaxValue>
+      <AxisNameID>256</AxisNameID>
+    </Axis>
+  </fvar>
+
+</ttFont>

Tests/varLib/instancer/data/test_results/CFF2Instancer-VF-3-instance-400.ttx

@@ -0,0 +1,377 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="OTTO" ttLibVersion="4.51">
+
+  <GlyphOrder>
+    <!-- The 'id' attribute is only for humans; it is ignored when parsed. -->
+    <GlyphID id="0" name=".notdef"/>
+    <GlyphID id="1" name="uni6868"/>
+  </GlyphOrder>
+
+  <head>
+    <!-- Most of this table will be recalculated by the compiler -->
+    <tableVersion value="1.0"/>
+    <fontRevision value="2.004"/>
+    <checkSumAdjustment value="0x25b28144"/>
+    <magicNumber value="0x5f0f3cf5"/>
+    <flags value="00000000 00000011"/>
+    <unitsPerEm value="1000"/>
+    <created value="Thu Apr 29 17:39:47 2021"/>
+    <modified value="Tue May 14 19:41:58 2024"/>
+    <xMin value="36"/>
+    <yMin value="-81"/>
+    <xMax value="966"/>
+    <yMax value="841"/>
+    <macStyle value="00000000 00000000"/>
+    <lowestRecPPEM value="3"/>
+    <fontDirectionHint value="2"/>
+    <indexToLocFormat value="0"/>
+    <glyphDataFormat value="0"/>
+  </head>
+
+  <hhea>
+    <tableVersion value="0x00010000"/>
+    <ascent value="1160"/>
+    <descent value="-288"/>
+    <lineGap value="0"/>
+    <advanceWidthMax value="1000"/>
+    <minLeftSideBearing value="46"/>
+    <minRightSideBearing value="24"/>
+    <xMaxExtent value="976"/>
+    <caretSlopeRise value="1"/>
+    <caretSlopeRun value="0"/>
+    <caretOffset value="0"/>
+    <reserved0 value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfHMetrics value="1"/>
+  </hhea>
+
+  <maxp>
+    <tableVersion value="0x5000"/>
+    <numGlyphs value="2"/>
+  </maxp>
+
+  <OS_2>
+    <!-- The fields 'usFirstCharIndex' and 'usLastCharIndex'
+         will be recalculated by the compiler -->
+    <version value="3"/>
+    <xAvgCharWidth value="1000"/>
+    <usWeightClass value="400"/>
+    <usWidthClass value="5"/>
+    <fsType value="00000000 00000000"/>
+    <ySubscriptXSize value="650"/>
+    <ySubscriptYSize value="600"/>
+    <ySubscriptXOffset value="0"/>
+    <ySubscriptYOffset value="75"/>
+    <ySuperscriptXSize value="650"/>
+    <ySuperscriptYSize value="600"/>
+    <ySuperscriptXOffset value="0"/>
+    <ySuperscriptYOffset value="350"/>
+    <yStrikeoutSize value="50"/>
+    <yStrikeoutPosition value="325"/>
+    <sFamilyClass value="0"/>
+    <panose>
+      <bFamilyType value="2"/>
+      <bSerifStyle value="11"/>
+      <bWeight value="2"/>
+      <bProportion value="0"/>
+      <bContrast value="0"/>
+      <bStrokeVariation value="0"/>
+      <bArmStyle value="0"/>
+      <bLetterForm value="0"/>
+      <bMidline value="0"/>
+      <bXHeight value="0"/>
+    </panose>
+    <ulUnicodeRange1 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange2 value="00001000 00000000 00000000 00000000"/>
+    <ulUnicodeRange3 value="00000000 00000000 00000000 00000000"/>
+    <ulUnicodeRange4 value="00000000 00000000 00000000 00000000"/>
+    <achVendID value="ADBO"/>
+    <fsSelection value="00000000 00000000"/>
+    <usFirstCharIndex value="26728"/>
+    <usLastCharIndex value="26728"/>
+    <sTypoAscender value="880"/>
+    <sTypoDescender value="-120"/>
+    <sTypoLineGap value="0"/>
+    <usWinAscent value="1160"/>
+    <usWinDescent value="288"/>
+    <ulCodePageRange1 value="00000000 00000000 00000000 00000001"/>
+    <ulCodePageRange2 value="00000000 00000000 00000000 00000000"/>
+    <sxHeight value="543"/>
+    <sCapHeight value="733"/>
+    <usDefaultChar value="0"/>
+    <usBreakChar value="32"/>
+    <usMaxContext value="6"/>
+  </OS_2>
+
+  <hmtx>
+    <mtx name=".notdef" width="1000" lsb="100"/>
+    <mtx name="uni6868" width="1000" lsb="46"/>
+  </hmtx>
+
+  <cmap>
+    <tableVersion version="0"/>
+    <cmap_format_4 platformID="0" platEncID="3" language="0">
+      <map code="0x6868" name="uni6868"/><!-- CJK UNIFIED IDEOGRAPH-6868 -->
+    </cmap_format_4>
+    <cmap_format_4 platformID="3" platEncID="1" language="0">
+      <map code="0x6868" name="uni6868"/><!-- CJK UNIFIED IDEOGRAPH-6868 -->
+    </cmap_format_4>
+  </cmap>
+
+  <name>
+    <namerecord nameID="0" platformID="3" platEncID="1" langID="0x409">
+      © 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
+    </namerecord>
+    <namerecord nameID="1" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="2" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="3" platformID="3" platEncID="1" langID="0x409">
+      2.004;ADBO;NotoSansSC-Thin;ADOBE
+    </namerecord>
+    <namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
+      Noto Sans SC
+    </namerecord>
+    <namerecord nameID="5" platformID="3" platEncID="1" langID="0x409">
+      Version 2.004;hotconv 1.0.118;makeotfexe 2.5.65603
+    </namerecord>
+    <namerecord nameID="6" platformID="3" platEncID="1" langID="0x409">
+      NotoSansSC-Thin
+    </namerecord>
+    <namerecord nameID="256" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="261" platformID="3" platEncID="1" langID="0x409">
+      Regular
+    </namerecord>
+    <namerecord nameID="265" platformID="3" platEncID="1" langID="0x409">
+      Weight
+    </namerecord>
+  </name>
+
+  <post>
+    <formatType value="3.0"/>
+    <italicAngle value="0.0"/>
+    <underlinePosition value="-125"/>
+    <underlineThickness value="50"/>
+    <isFixedPitch value="0"/>
+    <minMemType42 value="0"/>
+    <maxMemType42 value="0"/>
+    <minMemType1 value="0"/>
+    <maxMemType1 value="0"/>
+  </post>
+
+  <CFF2>
+    <major value="2"/>
+    <minor value="0"/>
+    <CFFFont name="CFF2Font">
+      <FontMatrix value="0.001 0 0 0.001 0 0"/>
+      <FDSelect format="0"/>
+      <FDArray>
+        <FontDict index="0">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="1"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+        <FontDict index="1">
+          <Private>
+            <BlueValues value="-250 -250 1100 1100"/>
+            <BlueScale value="0.039625"/>
+            <BlueShift value="7"/>
+            <BlueFuzz value="1"/>
+            <StdHW value="35"/>
+            <StdVW value="28"/>
+            <StemSnapV value="28 46"/>
+            <LanguageGroup value="1"/>
+            <ExpansionFactor value="0.06"/>
+          </Private>
+        </FontDict>
+      </FDArray>
+      <CharStrings>
+        <CharString name=".notdef" fdSelectIndex="0">
+        </CharString>
+        <CharString name="uni6868" fdSelectIndex="1">
+          63 284 rmoveto
+          -67 872 67 vlineto
+          -475 79 rmoveto
+          -444 76 444 vlineto
+          -111 -111 rmoveto
+          -83 -103 -161 -95 -145 -44 16 -15 23 -29 11 -19 145 52 163 105 90 119 rrcurveto
+          86 25 rmoveto
+          -61 -28 rlineto
+          91 -118 163 -103 152 -50 11 20 23 28 17 15 -152 41 -163 90 -82 104 rrcurveto
+          -498 508 rmoveto
+          38 -49 40 -67 15 -43 rrcurveto
+          62 35 -16 42 -42 64 -38 47 rlinecurve
+          149 53 rmoveto
+          -492 71 492 vlineto
+          -306 -367 rmoveto
+          32 -65 69 36 88 47 82 45 rlinecurve
+          -19 60 -93 -47 -95 -47 -63 -28 rlinecurve
+          474 133 rmoveto
+          50 -43 58 -62 26 -41 rrcurveto
+          59 37 -28 41 -58 60 -49 41 rlinecurve
+          -17 116 rmoveto
+          -64 329 64 vlineto
+          -292 88 rmoveto
+          -35 -76 -83 -82 -88 -48 14 -12 20 -25 10 -15 95 54 89 92 48 92 rrcurveto
+          203 -66 rmoveto
+          -12 vlineto
+          -69 -199 -189 -87 -235 -35 13 -15 20 -31 8 -18 243 45 200 98 84 231 rrcurveto
+          -45 25 -14 -3 rlineto
+        </CharString>
+      </CharStrings>
+    </CFFFont>
+
+    <GlobalSubrs>
+      <!-- The 'index' attribute is only for humans; it is ignored when parsed. -->
+    </GlobalSubrs>
+  </CFF2>
+
+  <GPOS>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=1 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GPOS>
+
+  <GSUB>
+    <Version value="0x00010000"/>
+    <ScriptList>
+      <!-- ScriptCount=6 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=0 -->
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="cyrl"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="2">
+        <ScriptTag value="grek"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="3">
+        <ScriptTag value="hani"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="4">
+        <ScriptTag value="kana"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="5">
+        <ScriptTag value="latn"/>
+        <Script>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=0 -->
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=0 -->
+    </LookupList>
+  </GSUB>
+
+  <STAT>
+    <Version value="0x00010001"/>
+    <DesignAxisRecordSize value="8"/>
+    <!-- DesignAxisCount=1 -->
+    <DesignAxisRecord>
+      <Axis index="0">
+        <AxisTag value="wght"/>
+        <AxisNameID value="265"/>  <!-- Weight -->
+        <AxisOrdering value="0"/>
+      </Axis>
+    </DesignAxisRecord>
+    <!-- AxisValueCount=1 -->
+    <AxisValueArray>
+      <AxisValue index="0" Format="2">
+        <AxisIndex value="0"/>
+        <Flags value="2"/>  <!-- ElidableAxisValueName -->
+        <ValueNameID value="261"/>  <!-- Regular -->
+        <NominalValue value="400.0"/>
+        <RangeMinValue value="400.0"/>
+        <RangeMaxValue value="499.0"/>
+      </AxisValue>
+    </AxisValueArray>
+    <ElidedFallbackNameID value="256"/>  <!-- Regular -->
+  </STAT>
+
+  <VORG>
+    <majorVersion value="1"/>
+    <minorVersion value="0"/>
+    <defaultVertOriginY value="880"/>
+    <numVertOriginYMetrics value="0"/>
+  </VORG>
+
+  <vhea>
+    <tableVersion value="0x00011000"/>
+    <ascent value="500"/>
+    <descent value="-500"/>
+    <lineGap value="0"/>
+    <advanceHeightMax value="1000"/>
+    <minTopSideBearing value="47"/>
+    <minBottomSideBearing value="31"/>
+    <yMaxExtent value="969"/>
+    <caretSlopeRise value="0"/>
+    <caretSlopeRun value="1"/>
+    <caretOffset value="0"/>
+    <reserved1 value="0"/>
+    <reserved2 value="0"/>
+    <reserved3 value="0"/>
+    <reserved4 value="0"/>
+    <metricDataFormat value="0"/>
+    <numberOfVMetrics value="1"/>
+  </vhea>
+
+  <vmtx>
+    <mtx name=".notdef" height="1000" tsb="0"/>
+    <mtx name="uni6868" height="1000" tsb="47"/>
+  </vmtx>
+
+</ttFont>

Tests/varLib/instancer/instancer_test.py

@@ -63,6 +63,88 @@ def _get_coordinates(varfont, glyphname):
     )
 
 
+class InstantiateCFF2Test(object):
+    @pytest.mark.parametrize(
+        "location, expected",
+        [
+            (
+                {},
+                [
+                    44,
+                    256,
+                    6,
+                    -29,
+                    2,
+                    "blend",
+                    "rmoveto",
+                    239,
+                    35,
+                    -239,
+                    44,
+                    90,
+                    -44,
+                    3,
+                    "blend",
+                    "hlineto",
+                ],
+            ),
+            ({"wght": 0}, [44, 256, "rmoveto", 239, 35, -239, "hlineto"]),
+            ({"wght": 0.5}, [47, 242, "rmoveto", 261, 80, -261, "hlineto"]),
+            ({"wght": 1}, [50, 227, "rmoveto", 283, 125, -283, "hlineto"]),
+        ],
+    )
+    def test_pin_and_drop_axis(self, varfont, location, expected):
+
+        varfont = ttLib.TTFont()
+        varfont.importXML(os.path.join(TESTDATA, "CFF2Instancer-VF-1.ttx"))
+
+        location = instancer.NormalizedAxisLimits(location)
+
+        instancer.instantiateCFF2(varfont, location)
+        instancer.instantiateHVAR(varfont, location)
+
+        program = varfont["CFF2"].cff.topDictIndex[0].CharStrings.values()[1].program
+        assert program == expected
+
+    @pytest.mark.parametrize(
+        "source_ttx, expected_ttx",
+        [
+            ("CFF2Instancer-VF-1.ttx", "CFF2Instancer-VF-1-instance-400.ttx"),
+            ("CFF2Instancer-VF-2.ttx", "CFF2Instancer-VF-2-instance-400.ttx"),
+            ("CFF2Instancer-VF-3.ttx", "CFF2Instancer-VF-3-instance-400.ttx"),
+        ],
+    )
+    def test_full_instance(self, varfont, source_ttx, expected_ttx):
+        varfont = ttLib.TTFont()
+        varfont.importXML(os.path.join(TESTDATA, source_ttx))
+        s = BytesIO()
+        varfont.save(s)
+        s.seek(0)
+        varfont = ttLib.TTFont(s)
+
+        instance = instancer.instantiateVariableFont(varfont, {"wght": 400})
+        s = BytesIO()
+        instance.save(s)
+        s.seek(0)
+        instance = ttLib.TTFont(s)
+
+        s = StringIO()
+        instance.saveXML(s)
+        actual = stripVariableItemsFromTTX(s.getvalue())
+
+        expected = ttLib.TTFont()
+        expected.importXML(os.path.join(TESTDATA, "test_results", expected_ttx))
+        s = BytesIO()
+        expected.save(s)
+        s.seek(0)
+        expected = ttLib.TTFont(s)
+        s = StringIO()
+        expected.saveXML(s)
+        expected = stripVariableItemsFromTTX(s.getvalue())
+
+        assert actual == expected
+
+
 class InstantiateGvarTest(object):
     @pytest.mark.parametrize("glyph_name", ["hyphen"])
     @pytest.mark.parametrize(