270 lines
8.5 KiB
Python
270 lines
8.5 KiB
Python
import os
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from fontTools.misc.py23 import BytesIO
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from fontTools.cffLib import (TopDictIndex,
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buildOrder,
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topDictOperators,
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topDictOperators2,
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privateDictOperators,
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privateDictOperators2,
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FDArrayIndex,
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FontDict,
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VarStoreData,)
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from fontTools.ttLib import newTable
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from fontTools import varLib
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from cff2mergePen import CFF2CharStringMergePen, MergeTypeError
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def addCFFVarStore(varFont, varModel):
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supports = varModel.supports[1:]
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fvarTable = varFont['fvar']
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axisKeys = [axis.axisTag for axis in fvarTable.axes]
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varTupleList = varLib.builder.buildVarRegionList(supports, axisKeys)
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varTupleIndexes = list(range(len(supports)))
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varDeltasCFFV = varLib.builder.buildVarData(varTupleIndexes, None, False)
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varStoreCFFV = varLib.builder.buildVarStore(varTupleList, [varDeltasCFFV])
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topDict = varFont['CFF2'].cff.topDictIndex[0]
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topDict.VarStore = VarStoreData(otVarStore=varStoreCFFV)
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def addNamesToPost(ttFont, fontGlyphList):
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postTable = ttFont['post']
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postTable.glyphOrder = ttFont.glyphOrder = fontGlyphList
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postTable.formatType = 2.0
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postTable.extraNames = []
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postTable.mapping = {}
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postTable.compile(ttFont)
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def lib_convertCFFToCFF2(cff, otFont):
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# This assumes a decompiled CFF table.
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cff2GetGlyphOrder = cff.otFont.getGlyphOrder
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topDictData = TopDictIndex(None, cff2GetGlyphOrder, None)
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topDictData.items = cff.topDictIndex.items
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cff.topDictIndex = topDictData
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topDict = topDictData[0]
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if hasattr(topDict, 'Private'):
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privateDict = topDict.Private
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else:
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privateDict = None
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opOrder = buildOrder(topDictOperators2)
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topDict.order = opOrder
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topDict.cff2GetGlyphOrder = cff2GetGlyphOrder
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if not hasattr(topDict, "FDArray"):
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fdArray = topDict.FDArray = FDArrayIndex()
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fdArray.strings = None
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fdArray.GlobalSubrs = topDict.GlobalSubrs
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topDict.GlobalSubrs.fdArray = fdArray
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charStrings = topDict.CharStrings
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if charStrings.charStringsAreIndexed:
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charStrings.charStringsIndex.fdArray = fdArray
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else:
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charStrings.fdArray = fdArray
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fontDict = FontDict()
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fontDict.setCFF2(True)
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fdArray.append(fontDict)
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fontDict.Private = privateDict
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privateOpOrder = buildOrder(privateDictOperators2)
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for entry in privateDictOperators:
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key = entry[1]
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if key not in privateOpOrder:
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if key in privateDict.rawDict:
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# print "Removing private dict", key
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del privateDict.rawDict[key]
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if hasattr(privateDict, key):
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delattr(privateDict, key)
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# print "Removing privateDict attr", key
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else:
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# clean up the PrivateDicts in the fdArray
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fdArray = topDict.FDArray
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privateOpOrder = buildOrder(privateDictOperators2)
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for fontDict in fdArray:
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fontDict.setCFF2(True)
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for key in fontDict.rawDict.keys():
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if key not in fontDict.order:
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del fontDict.rawDict[key]
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if hasattr(fontDict, key):
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delattr(fontDict, key)
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privateDict = fontDict.Private
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for entry in privateDictOperators:
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key = entry[1]
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if key not in privateOpOrder:
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if key in privateDict.rawDict:
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# print "Removing private dict", key
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del privateDict.rawDict[key]
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if hasattr(privateDict, key):
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delattr(privateDict, key)
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# print "Removing privateDict attr", key
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# Now delete up the decrecated topDict operators from CFF 1.0
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for entry in topDictOperators:
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key = entry[1]
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if key not in opOrder:
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if key in topDict.rawDict:
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del topDict.rawDict[key]
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if hasattr(topDict, key):
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delattr(topDict, key)
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# At this point, the Subrs and Charstrings are all still T2Charstring class
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# easiest to fix this by compiling, then decompiling again
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cff.major = 2
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file = BytesIO()
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cff.compile(file, otFont, isCFF2=True)
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file.seek(0)
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cff.decompile(file, otFont, isCFF2=True)
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def pointsDiffer(pointList):
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p0 = max(pointList)
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p1 = min(pointList)
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result = False if p1 == p0 else True
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return result
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def convertCFFtoCFF2(varFont):
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# Convert base font to a single master CFF2 font.
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cffTable = varFont['CFF ']
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lib_convertCFFToCFF2(cffTable.cff, varFont)
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newCFF2 = newTable("CFF2")
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newCFF2.cff = cffTable.cff
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varFont['CFF2'] = newCFF2
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del varFont['CFF ']
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class MergeDictError(TypeError):
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def __init__(self, key, value, values):
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error_msg = ["For the Private Dict key ()".format(key)]
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error_msg.append("the default font value list:")
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error_msg.append("\t{}".format(value))
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error_msg.append(
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"had a different number of values than"
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"a region font:")
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for value in values:
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error_msg.append("\t{}".format(value))
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error_msg = os.linesep.join(error_msg)
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def conv_to_int(num):
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if round(num) == num:
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return int(num)
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else:
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return num
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def merge_PrivateDicts(topDict, region_top_dicts, num_masters, var_model):
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if hasattr(region_top_dicts[0], 'FDArray'):
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regionFDArrays = [fdTopDict.FDArray for fdTopDict in region_top_dicts]
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else:
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regionFDArrays = [[fdTopDict] for fdTopDict in region_top_dicts]
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for fd_index, font_dict in enumerate(topDict.FDArray):
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private_dict = font_dict.Private
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pds = [private_dict] + [
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regionFDArray[fd_index].Private for regionFDArray in regionFDArrays
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]
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for key, value in private_dict.rawDict.items():
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if isinstance(value, list):
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try:
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values = [pd.rawDict[key] for pd in pds]
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except KeyError:
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del private_dict.rawDict[key]
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print(
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"Warning: {key} in default font Private dict is "
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b"missing from another font, and was "
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b"discarded.".format(key=key))
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continue
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try:
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values = zip(*values)
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except IndexError:
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raise MergeDictError(key, value, values)
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"""
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Row 0 contains the first value from each master.
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Convert each row from absolute values to relative
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values from the previous row.
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e.g for three masters, a list of values was:
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master 0 OtherBlues = [-217,-205]
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master 1 OtherBlues = [-234,-222]
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master 1 OtherBlues = [-188,-176]
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The call to zip() converts this to:
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[(-217, -234, -188), (-205, -222, -176)]
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and is converted finally to:
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OtherBlues = [[-217, 17.0, 46.0], [-205, 0.0, 0.0]]
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"""
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dataList = []
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prev_val_list = [0] * num_masters
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any_points_differ = False
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for val_list in values:
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rel_list = [(val - prev_val_list[i]) for (
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i, val) in enumerate(val_list)]
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if (not any_points_differ) and pointsDiffer(rel_list):
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any_points_differ = True
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prev_val_list = val_list
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deltas = var_model.getDeltas(rel_list)
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# Convert numbers with no decimal part to an int.
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deltas = [conv_to_int(delta) for delta in deltas]
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# For PrivateDict BlueValues, the default font
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# values are absolute, not relative to the prior value.
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deltas[0] = val_list[0]
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dataList.append(deltas)
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# If there are no blend values,then
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# we can collapse the blend lists.
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if not any_points_differ:
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dataList = [data[0] for data in dataList]
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else:
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values = [pd.rawDict[key] for pd in pds]
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if pointsDiffer(values):
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dataList = var_model.getDeltas(values)
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else:
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dataList = values[0]
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private_dict.rawDict[key] = dataList
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class MergeCharError(TypeError):
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def __init__(self, glyph_name, mergeError):
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self.error_msg = "{mergeError} in glyph {glyph_name}".format(
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mergeError=mergeError.error_msg,
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glyph_name=glyph_name)
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super(MergeCharError, self).__init__(self.error_msg)
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def merge_region_fonts(varFont, model, ordered_fonts_list, glyphOrder):
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topDict = varFont['CFF2'].cff.topDictIndex[0]
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default_charstrings = topDict.CharStrings
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region_fonts = ordered_fonts_list[1:]
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region_top_dicts = [
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ttFont['CFF '].cff.topDictIndex[0] for ttFont in region_fonts
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]
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num_masters = len(model.mapping)
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merge_PrivateDicts(topDict, region_top_dicts, num_masters, model)
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merge_charstrings(default_charstrings,
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glyphOrder,
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num_masters,
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region_top_dicts, model)
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def merge_charstrings(default_charstrings,
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glyphOrder,
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num_masters,
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region_top_dicts,
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var_model):
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for gname in glyphOrder:
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default_charstring = default_charstrings[gname]
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var_pen = CFF2CharStringMergePen([], num_masters, master_idx=0)
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default_charstring.draw(var_pen)
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for region_idx, region_td in enumerate(region_top_dicts):
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region_idx += 1
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region_charstrings = region_td.CharStrings
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region_charstring = region_charstrings[gname]
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var_pen.restart(region_idx)
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try:
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region_charstring.draw(var_pen)
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except MergeTypeError as err:
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err.gname = gname
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err.region_idx = region_idx
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raise MergeCharError(gname, err)
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new_charstring = var_pen.getCharString(
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private=default_charstring.private,
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globalSubrs=default_charstring.globalSubrs,
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var_model=var_model,
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optimize=True)
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default_charstrings[gname] = new_charstring
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