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1512 lines
42 KiB
Python
1512 lines
42 KiB
Python
"""psCharStrings.py -- module implementing various kinds of CharStrings:
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CFF dictionary data and Type1/Type2 CharStrings.
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"""
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from fontTools.misc.fixedTools import (
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fixedToFloat,
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floatToFixed,
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floatToFixedToStr,
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strToFixedToFloat,
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)
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from fontTools.misc.textTools import bytechr, byteord, bytesjoin, strjoin
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from fontTools.pens.boundsPen import BoundsPen
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import struct
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import logging
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log = logging.getLogger(__name__)
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def read_operator(self, b0, data, index):
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if b0 == 12:
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op = (b0, byteord(data[index]))
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index = index + 1
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else:
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op = b0
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try:
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operator = self.operators[op]
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except KeyError:
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return None, index
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value = self.handle_operator(operator)
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return value, index
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def read_byte(self, b0, data, index):
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return b0 - 139, index
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def read_smallInt1(self, b0, data, index):
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b1 = byteord(data[index])
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return (b0 - 247) * 256 + b1 + 108, index + 1
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def read_smallInt2(self, b0, data, index):
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b1 = byteord(data[index])
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return -(b0 - 251) * 256 - b1 - 108, index + 1
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def read_shortInt(self, b0, data, index):
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(value,) = struct.unpack(">h", data[index : index + 2])
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return value, index + 2
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def read_longInt(self, b0, data, index):
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(value,) = struct.unpack(">l", data[index : index + 4])
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return value, index + 4
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def read_fixed1616(self, b0, data, index):
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(value,) = struct.unpack(">l", data[index : index + 4])
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return fixedToFloat(value, precisionBits=16), index + 4
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def read_reserved(self, b0, data, index):
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assert NotImplementedError
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return NotImplemented, index
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def read_realNumber(self, b0, data, index):
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number = ""
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while True:
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b = byteord(data[index])
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index = index + 1
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nibble0 = (b & 0xF0) >> 4
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nibble1 = b & 0x0F
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if nibble0 == 0xF:
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break
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number = number + realNibbles[nibble0]
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if nibble1 == 0xF:
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break
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number = number + realNibbles[nibble1]
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return float(number), index
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t1OperandEncoding = [None] * 256
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t1OperandEncoding[0:32] = (32) * [read_operator]
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t1OperandEncoding[32:247] = (247 - 32) * [read_byte]
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t1OperandEncoding[247:251] = (251 - 247) * [read_smallInt1]
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t1OperandEncoding[251:255] = (255 - 251) * [read_smallInt2]
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t1OperandEncoding[255] = read_longInt
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assert len(t1OperandEncoding) == 256
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t2OperandEncoding = t1OperandEncoding[:]
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t2OperandEncoding[28] = read_shortInt
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t2OperandEncoding[255] = read_fixed1616
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cffDictOperandEncoding = t2OperandEncoding[:]
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cffDictOperandEncoding[29] = read_longInt
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cffDictOperandEncoding[30] = read_realNumber
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cffDictOperandEncoding[255] = read_reserved
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realNibbles = [
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"0",
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"1",
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"2",
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"3",
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"4",
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"5",
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"6",
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"7",
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"8",
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"9",
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".",
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"E",
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"E-",
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None,
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"-",
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]
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realNibblesDict = {v: i for i, v in enumerate(realNibbles)}
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maxOpStack = 193
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def buildOperatorDict(operatorList):
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oper = {}
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opc = {}
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for item in operatorList:
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if len(item) == 2:
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oper[item[0]] = item[1]
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else:
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oper[item[0]] = item[1:]
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if isinstance(item[0], tuple):
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opc[item[1]] = item[0]
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else:
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opc[item[1]] = (item[0],)
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return oper, opc
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t2Operators = [
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# opcode name
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(1, "hstem"),
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(3, "vstem"),
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(4, "vmoveto"),
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(5, "rlineto"),
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(6, "hlineto"),
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(7, "vlineto"),
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(8, "rrcurveto"),
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(10, "callsubr"),
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(11, "return"),
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(14, "endchar"),
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(15, "vsindex"),
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(16, "blend"),
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(18, "hstemhm"),
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(19, "hintmask"),
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(20, "cntrmask"),
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(21, "rmoveto"),
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(22, "hmoveto"),
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(23, "vstemhm"),
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(24, "rcurveline"),
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(25, "rlinecurve"),
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(26, "vvcurveto"),
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(27, "hhcurveto"),
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# (28, 'shortint'), # not really an operator
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(29, "callgsubr"),
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(30, "vhcurveto"),
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(31, "hvcurveto"),
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((12, 0), "ignore"), # dotsection. Yes, there a few very early OTF/CFF
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# fonts with this deprecated operator. Just ignore it.
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((12, 3), "and"),
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((12, 4), "or"),
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((12, 5), "not"),
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((12, 8), "store"),
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((12, 9), "abs"),
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((12, 10), "add"),
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((12, 11), "sub"),
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((12, 12), "div"),
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((12, 13), "load"),
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((12, 14), "neg"),
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((12, 15), "eq"),
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((12, 18), "drop"),
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((12, 20), "put"),
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((12, 21), "get"),
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((12, 22), "ifelse"),
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((12, 23), "random"),
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((12, 24), "mul"),
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((12, 26), "sqrt"),
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((12, 27), "dup"),
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((12, 28), "exch"),
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((12, 29), "index"),
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((12, 30), "roll"),
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((12, 34), "hflex"),
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((12, 35), "flex"),
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((12, 36), "hflex1"),
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((12, 37), "flex1"),
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]
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def getIntEncoder(format):
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if format == "cff":
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twoByteOp = bytechr(28)
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fourByteOp = bytechr(29)
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elif format == "t1":
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twoByteOp = None
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fourByteOp = bytechr(255)
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else:
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assert format == "t2"
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twoByteOp = bytechr(28)
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fourByteOp = None
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def encodeInt(
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value,
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fourByteOp=fourByteOp,
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bytechr=bytechr,
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pack=struct.pack,
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unpack=struct.unpack,
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twoByteOp=twoByteOp,
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):
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if -107 <= value <= 107:
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code = bytechr(value + 139)
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elif 108 <= value <= 1131:
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value = value - 108
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code = bytechr((value >> 8) + 247) + bytechr(value & 0xFF)
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elif -1131 <= value <= -108:
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value = -value - 108
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code = bytechr((value >> 8) + 251) + bytechr(value & 0xFF)
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elif twoByteOp is not None and -32768 <= value <= 32767:
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code = twoByteOp + pack(">h", value)
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elif fourByteOp is None:
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# Backwards compatible hack: due to a previous bug in FontTools,
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# 16.16 fixed numbers were written out as 4-byte ints. When
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# these numbers were small, they were wrongly written back as
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# small ints instead of 4-byte ints, breaking round-tripping.
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# This here workaround doesn't do it any better, since we can't
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# distinguish anymore between small ints that were supposed to
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# be small fixed numbers and small ints that were just small
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# ints. Hence the warning.
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log.warning(
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"4-byte T2 number got passed to the "
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"IntType handler. This should happen only when reading in "
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"old XML files.\n"
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)
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code = bytechr(255) + pack(">l", value)
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else:
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code = fourByteOp + pack(">l", value)
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return code
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return encodeInt
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encodeIntCFF = getIntEncoder("cff")
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encodeIntT1 = getIntEncoder("t1")
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encodeIntT2 = getIntEncoder("t2")
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def encodeFixed(f, pack=struct.pack):
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"""For T2 only"""
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value = floatToFixed(f, precisionBits=16)
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if value & 0xFFFF == 0: # check if the fractional part is zero
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return encodeIntT2(value >> 16) # encode only the integer part
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else:
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return b"\xff" + pack(">l", value) # encode the entire fixed point value
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realZeroBytes = bytechr(30) + bytechr(0xF)
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def encodeFloat(f):
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# For CFF only, used in cffLib
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if f == 0.0: # 0.0 == +0.0 == -0.0
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return realZeroBytes
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# Note: 14 decimal digits seems to be the limitation for CFF real numbers
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# in macOS. However, we use 8 here to match the implementation of AFDKO.
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s = "%.8G" % f
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if s[:2] == "0.":
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s = s[1:]
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elif s[:3] == "-0.":
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s = "-" + s[2:]
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elif s.endswith("000"):
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significantDigits = s.rstrip("0")
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s = "%sE%d" % (significantDigits, len(s) - len(significantDigits))
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else:
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dotIndex = s.find(".")
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eIndex = s.find("E")
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if dotIndex != -1 and eIndex != -1:
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integerPart = s[:dotIndex]
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fractionalPart = s[dotIndex + 1 : eIndex]
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exponent = int(s[eIndex + 1 :])
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newExponent = exponent - len(fractionalPart)
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if newExponent == 1:
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s = "%s%s0" % (integerPart, fractionalPart)
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else:
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s = "%s%sE%d" % (integerPart, fractionalPart, newExponent)
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if s.startswith((".0", "-.0")):
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sign, s = s.split(".", 1)
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s = "%s%sE-%d" % (sign, s.lstrip("0"), len(s))
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nibbles = []
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while s:
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c = s[0]
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s = s[1:]
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if c == "E":
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c2 = s[:1]
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if c2 == "-":
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s = s[1:]
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c = "E-"
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elif c2 == "+":
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s = s[1:]
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if s.startswith("0"):
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s = s[1:]
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nibbles.append(realNibblesDict[c])
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nibbles.append(0xF)
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if len(nibbles) % 2:
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nibbles.append(0xF)
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d = bytechr(30)
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for i in range(0, len(nibbles), 2):
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d = d + bytechr(nibbles[i] << 4 | nibbles[i + 1])
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return d
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class CharStringCompileError(Exception):
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pass
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class SimpleT2Decompiler(object):
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def __init__(self, localSubrs, globalSubrs, private=None, blender=None):
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self.localSubrs = localSubrs
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self.localBias = calcSubrBias(localSubrs)
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self.globalSubrs = globalSubrs
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self.globalBias = calcSubrBias(globalSubrs)
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self.private = private
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self.blender = blender
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self.reset()
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def reset(self):
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self.callingStack = []
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self.operandStack = []
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self.hintCount = 0
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self.hintMaskBytes = 0
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self.numRegions = 0
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self.vsIndex = 0
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def execute(self, charString, *, pushToStack=None):
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self.callingStack.append(charString)
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needsDecompilation = charString.needsDecompilation()
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if needsDecompilation:
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program = []
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pushToProgram = program.append
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else:
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pushToProgram = lambda x: None
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if pushToStack is None:
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pushToStack = self.operandStack.append
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index = 0
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while True:
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token, isOperator, index = charString.getToken(index)
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if token is None:
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break # we're done!
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pushToProgram(token)
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if isOperator:
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handlerName = "op_" + token
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handler = getattr(self, handlerName, None)
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if handler is not None:
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rv = handler(index)
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if rv:
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hintMaskBytes, index = rv
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pushToProgram(hintMaskBytes)
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else:
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self.popall()
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else:
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pushToStack(token)
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if needsDecompilation:
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charString.setProgram(program)
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del self.callingStack[-1]
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def pop(self):
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value = self.operandStack[-1]
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del self.operandStack[-1]
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return value
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def popall(self):
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stack = self.operandStack[:]
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self.operandStack[:] = []
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return stack
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def push(self, value):
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self.operandStack.append(value)
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def op_return(self, index):
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if self.operandStack:
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pass
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def op_endchar(self, index):
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pass
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def op_ignore(self, index):
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pass
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def op_callsubr(self, index):
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subrIndex = self.pop()
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subr = self.localSubrs[subrIndex + self.localBias]
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self.execute(subr)
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def op_callgsubr(self, index):
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subrIndex = self.pop()
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subr = self.globalSubrs[subrIndex + self.globalBias]
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self.execute(subr)
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def op_hstem(self, index):
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self.countHints()
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def op_vstem(self, index):
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self.countHints()
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def op_hstemhm(self, index):
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self.countHints()
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def op_vstemhm(self, index):
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self.countHints()
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def op_hintmask(self, index):
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if not self.hintMaskBytes:
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self.countHints()
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self.hintMaskBytes = (self.hintCount + 7) // 8
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hintMaskBytes, index = self.callingStack[-1].getBytes(index, self.hintMaskBytes)
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return hintMaskBytes, index
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op_cntrmask = op_hintmask
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def countHints(self):
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args = self.popall()
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self.hintCount = self.hintCount + len(args) // 2
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# misc
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def op_and(self, index):
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raise NotImplementedError
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def op_or(self, index):
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raise NotImplementedError
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def op_not(self, index):
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raise NotImplementedError
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def op_store(self, index):
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raise NotImplementedError
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def op_abs(self, index):
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raise NotImplementedError
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def op_add(self, index):
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raise NotImplementedError
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def op_sub(self, index):
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raise NotImplementedError
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def op_div(self, index):
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raise NotImplementedError
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def op_load(self, index):
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raise NotImplementedError
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def op_neg(self, index):
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raise NotImplementedError
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def op_eq(self, index):
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raise NotImplementedError
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def op_drop(self, index):
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raise NotImplementedError
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def op_put(self, index):
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raise NotImplementedError
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def op_get(self, index):
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raise NotImplementedError
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def op_ifelse(self, index):
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raise NotImplementedError
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def op_random(self, index):
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raise NotImplementedError
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def op_mul(self, index):
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raise NotImplementedError
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def op_sqrt(self, index):
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raise NotImplementedError
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def op_dup(self, index):
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raise NotImplementedError
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def op_exch(self, index):
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raise NotImplementedError
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def op_index(self, index):
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raise NotImplementedError
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def op_roll(self, index):
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raise NotImplementedError
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def op_blend(self, index):
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if self.numRegions == 0:
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self.numRegions = self.private.getNumRegions()
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numBlends = self.pop()
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numOps = numBlends * (self.numRegions + 1)
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if self.blender is None:
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del self.operandStack[
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-(numOps - numBlends) :
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] # Leave the default operands on the stack.
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else:
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argi = len(self.operandStack) - numOps
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end_args = tuplei = argi + numBlends
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while argi < end_args:
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next_ti = tuplei + self.numRegions
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deltas = self.operandStack[tuplei:next_ti]
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delta = self.blender(self.vsIndex, deltas)
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self.operandStack[argi] += delta
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tuplei = next_ti
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argi += 1
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self.operandStack[end_args:] = []
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def op_vsindex(self, index):
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vi = self.pop()
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self.vsIndex = vi
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self.numRegions = self.private.getNumRegions(vi)
|
|
|
|
|
|
t1Operators = [
|
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# opcode name
|
|
(1, "hstem"),
|
|
(3, "vstem"),
|
|
(4, "vmoveto"),
|
|
(5, "rlineto"),
|
|
(6, "hlineto"),
|
|
(7, "vlineto"),
|
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(8, "rrcurveto"),
|
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(9, "closepath"),
|
|
(10, "callsubr"),
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(11, "return"),
|
|
(13, "hsbw"),
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|
(14, "endchar"),
|
|
(21, "rmoveto"),
|
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(22, "hmoveto"),
|
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(30, "vhcurveto"),
|
|
(31, "hvcurveto"),
|
|
((12, 0), "dotsection"),
|
|
((12, 1), "vstem3"),
|
|
((12, 2), "hstem3"),
|
|
((12, 6), "seac"),
|
|
((12, 7), "sbw"),
|
|
((12, 12), "div"),
|
|
((12, 16), "callothersubr"),
|
|
((12, 17), "pop"),
|
|
((12, 33), "setcurrentpoint"),
|
|
]
|
|
|
|
|
|
class T2StackUseExtractor(SimpleT2Decompiler):
|
|
|
|
def execute(self, charString):
|
|
maxStackUse = 0
|
|
|
|
def pushToStack(value):
|
|
nonlocal maxStackUse
|
|
self.operandStack.append(value)
|
|
maxStackUse = max(maxStackUse, len(self.operandStack))
|
|
|
|
super().execute(charString, pushToStack=pushToStack)
|
|
return maxStackUse
|
|
|
|
|
|
class T2WidthExtractor(SimpleT2Decompiler):
|
|
def __init__(
|
|
self,
|
|
localSubrs,
|
|
globalSubrs,
|
|
nominalWidthX,
|
|
defaultWidthX,
|
|
private=None,
|
|
blender=None,
|
|
):
|
|
SimpleT2Decompiler.__init__(self, localSubrs, globalSubrs, private, blender)
|
|
self.nominalWidthX = nominalWidthX
|
|
self.defaultWidthX = defaultWidthX
|
|
|
|
def reset(self):
|
|
SimpleT2Decompiler.reset(self)
|
|
self.gotWidth = 0
|
|
self.width = 0
|
|
|
|
def popallWidth(self, evenOdd=0):
|
|
args = self.popall()
|
|
if not self.gotWidth:
|
|
if evenOdd ^ (len(args) % 2):
|
|
# For CFF2 charstrings, this should never happen
|
|
assert (
|
|
self.defaultWidthX is not None
|
|
), "CFF2 CharStrings must not have an initial width value"
|
|
self.width = self.nominalWidthX + args[0]
|
|
args = args[1:]
|
|
else:
|
|
self.width = self.defaultWidthX
|
|
self.gotWidth = 1
|
|
return args
|
|
|
|
def countHints(self):
|
|
args = self.popallWidth()
|
|
self.hintCount = self.hintCount + len(args) // 2
|
|
|
|
def op_rmoveto(self, index):
|
|
self.popallWidth()
|
|
|
|
def op_hmoveto(self, index):
|
|
self.popallWidth(1)
|
|
|
|
def op_vmoveto(self, index):
|
|
self.popallWidth(1)
|
|
|
|
def op_endchar(self, index):
|
|
self.popallWidth()
|
|
|
|
|
|
class T2OutlineExtractor(T2WidthExtractor):
|
|
def __init__(
|
|
self,
|
|
pen,
|
|
localSubrs,
|
|
globalSubrs,
|
|
nominalWidthX,
|
|
defaultWidthX,
|
|
private=None,
|
|
blender=None,
|
|
):
|
|
T2WidthExtractor.__init__(
|
|
self,
|
|
localSubrs,
|
|
globalSubrs,
|
|
nominalWidthX,
|
|
defaultWidthX,
|
|
private,
|
|
blender,
|
|
)
|
|
self.pen = pen
|
|
self.subrLevel = 0
|
|
|
|
def reset(self):
|
|
T2WidthExtractor.reset(self)
|
|
self.currentPoint = (0, 0)
|
|
self.sawMoveTo = 0
|
|
self.subrLevel = 0
|
|
|
|
def execute(self, charString):
|
|
self.subrLevel += 1
|
|
super().execute(charString)
|
|
self.subrLevel -= 1
|
|
if self.subrLevel == 0:
|
|
self.endPath()
|
|
|
|
def _nextPoint(self, point):
|
|
x, y = self.currentPoint
|
|
point = x + point[0], y + point[1]
|
|
self.currentPoint = point
|
|
return point
|
|
|
|
def rMoveTo(self, point):
|
|
self.pen.moveTo(self._nextPoint(point))
|
|
self.sawMoveTo = 1
|
|
|
|
def rLineTo(self, point):
|
|
if not self.sawMoveTo:
|
|
self.rMoveTo((0, 0))
|
|
self.pen.lineTo(self._nextPoint(point))
|
|
|
|
def rCurveTo(self, pt1, pt2, pt3):
|
|
if not self.sawMoveTo:
|
|
self.rMoveTo((0, 0))
|
|
nextPoint = self._nextPoint
|
|
self.pen.curveTo(nextPoint(pt1), nextPoint(pt2), nextPoint(pt3))
|
|
|
|
def closePath(self):
|
|
if self.sawMoveTo:
|
|
self.pen.closePath()
|
|
self.sawMoveTo = 0
|
|
|
|
def endPath(self):
|
|
# In T2 there are no open paths, so always do a closePath when
|
|
# finishing a sub path. We avoid spurious calls to closePath()
|
|
# because its a real T1 op we're emulating in T2 whereas
|
|
# endPath() is just a means to that emulation
|
|
if self.sawMoveTo:
|
|
self.closePath()
|
|
|
|
#
|
|
# hint operators
|
|
#
|
|
# def op_hstem(self, index):
|
|
# self.countHints()
|
|
# def op_vstem(self, index):
|
|
# self.countHints()
|
|
# def op_hstemhm(self, index):
|
|
# self.countHints()
|
|
# def op_vstemhm(self, index):
|
|
# self.countHints()
|
|
# def op_hintmask(self, index):
|
|
# self.countHints()
|
|
# def op_cntrmask(self, index):
|
|
# self.countHints()
|
|
|
|
#
|
|
# path constructors, moveto
|
|
#
|
|
def op_rmoveto(self, index):
|
|
self.endPath()
|
|
self.rMoveTo(self.popallWidth())
|
|
|
|
def op_hmoveto(self, index):
|
|
self.endPath()
|
|
self.rMoveTo((self.popallWidth(1)[0], 0))
|
|
|
|
def op_vmoveto(self, index):
|
|
self.endPath()
|
|
self.rMoveTo((0, self.popallWidth(1)[0]))
|
|
|
|
def op_endchar(self, index):
|
|
self.endPath()
|
|
args = self.popallWidth()
|
|
if args:
|
|
from fontTools.encodings.StandardEncoding import StandardEncoding
|
|
|
|
# endchar can do seac accent bulding; The T2 spec says it's deprecated,
|
|
# but recent software that shall remain nameless does output it.
|
|
adx, ady, bchar, achar = args
|
|
baseGlyph = StandardEncoding[bchar]
|
|
self.pen.addComponent(baseGlyph, (1, 0, 0, 1, 0, 0))
|
|
accentGlyph = StandardEncoding[achar]
|
|
self.pen.addComponent(accentGlyph, (1, 0, 0, 1, adx, ady))
|
|
|
|
#
|
|
# path constructors, lines
|
|
#
|
|
def op_rlineto(self, index):
|
|
args = self.popall()
|
|
for i in range(0, len(args), 2):
|
|
point = args[i : i + 2]
|
|
self.rLineTo(point)
|
|
|
|
def op_hlineto(self, index):
|
|
self.alternatingLineto(1)
|
|
|
|
def op_vlineto(self, index):
|
|
self.alternatingLineto(0)
|
|
|
|
#
|
|
# path constructors, curves
|
|
#
|
|
def op_rrcurveto(self, index):
|
|
"""{dxa dya dxb dyb dxc dyc}+ rrcurveto"""
|
|
args = self.popall()
|
|
for i in range(0, len(args), 6):
|
|
(
|
|
dxa,
|
|
dya,
|
|
dxb,
|
|
dyb,
|
|
dxc,
|
|
dyc,
|
|
) = args[i : i + 6]
|
|
self.rCurveTo((dxa, dya), (dxb, dyb), (dxc, dyc))
|
|
|
|
def op_rcurveline(self, index):
|
|
"""{dxa dya dxb dyb dxc dyc}+ dxd dyd rcurveline"""
|
|
args = self.popall()
|
|
for i in range(0, len(args) - 2, 6):
|
|
dxb, dyb, dxc, dyc, dxd, dyd = args[i : i + 6]
|
|
self.rCurveTo((dxb, dyb), (dxc, dyc), (dxd, dyd))
|
|
self.rLineTo(args[-2:])
|
|
|
|
def op_rlinecurve(self, index):
|
|
"""{dxa dya}+ dxb dyb dxc dyc dxd dyd rlinecurve"""
|
|
args = self.popall()
|
|
lineArgs = args[:-6]
|
|
for i in range(0, len(lineArgs), 2):
|
|
self.rLineTo(lineArgs[i : i + 2])
|
|
dxb, dyb, dxc, dyc, dxd, dyd = args[-6:]
|
|
self.rCurveTo((dxb, dyb), (dxc, dyc), (dxd, dyd))
|
|
|
|
def op_vvcurveto(self, index):
|
|
"dx1? {dya dxb dyb dyc}+ vvcurveto"
|
|
args = self.popall()
|
|
if len(args) % 2:
|
|
dx1 = args[0]
|
|
args = args[1:]
|
|
else:
|
|
dx1 = 0
|
|
for i in range(0, len(args), 4):
|
|
dya, dxb, dyb, dyc = args[i : i + 4]
|
|
self.rCurveTo((dx1, dya), (dxb, dyb), (0, dyc))
|
|
dx1 = 0
|
|
|
|
def op_hhcurveto(self, index):
|
|
"""dy1? {dxa dxb dyb dxc}+ hhcurveto"""
|
|
args = self.popall()
|
|
if len(args) % 2:
|
|
dy1 = args[0]
|
|
args = args[1:]
|
|
else:
|
|
dy1 = 0
|
|
for i in range(0, len(args), 4):
|
|
dxa, dxb, dyb, dxc = args[i : i + 4]
|
|
self.rCurveTo((dxa, dy1), (dxb, dyb), (dxc, 0))
|
|
dy1 = 0
|
|
|
|
def op_vhcurveto(self, index):
|
|
"""dy1 dx2 dy2 dx3 {dxa dxb dyb dyc dyd dxe dye dxf}* dyf? vhcurveto (30)
|
|
{dya dxb dyb dxc dxd dxe dye dyf}+ dxf? vhcurveto
|
|
"""
|
|
args = self.popall()
|
|
while args:
|
|
args = self.vcurveto(args)
|
|
if args:
|
|
args = self.hcurveto(args)
|
|
|
|
def op_hvcurveto(self, index):
|
|
"""dx1 dx2 dy2 dy3 {dya dxb dyb dxc dxd dxe dye dyf}* dxf?
|
|
{dxa dxb dyb dyc dyd dxe dye dxf}+ dyf?
|
|
"""
|
|
args = self.popall()
|
|
while args:
|
|
args = self.hcurveto(args)
|
|
if args:
|
|
args = self.vcurveto(args)
|
|
|
|
#
|
|
# path constructors, flex
|
|
#
|
|
def op_hflex(self, index):
|
|
dx1, dx2, dy2, dx3, dx4, dx5, dx6 = self.popall()
|
|
dy1 = dy3 = dy4 = dy6 = 0
|
|
dy5 = -dy2
|
|
self.rCurveTo((dx1, dy1), (dx2, dy2), (dx3, dy3))
|
|
self.rCurveTo((dx4, dy4), (dx5, dy5), (dx6, dy6))
|
|
|
|
def op_flex(self, index):
|
|
dx1, dy1, dx2, dy2, dx3, dy3, dx4, dy4, dx5, dy5, dx6, dy6, fd = self.popall()
|
|
self.rCurveTo((dx1, dy1), (dx2, dy2), (dx3, dy3))
|
|
self.rCurveTo((dx4, dy4), (dx5, dy5), (dx6, dy6))
|
|
|
|
def op_hflex1(self, index):
|
|
dx1, dy1, dx2, dy2, dx3, dx4, dx5, dy5, dx6 = self.popall()
|
|
dy3 = dy4 = 0
|
|
dy6 = -(dy1 + dy2 + dy3 + dy4 + dy5)
|
|
|
|
self.rCurveTo((dx1, dy1), (dx2, dy2), (dx3, dy3))
|
|
self.rCurveTo((dx4, dy4), (dx5, dy5), (dx6, dy6))
|
|
|
|
def op_flex1(self, index):
|
|
dx1, dy1, dx2, dy2, dx3, dy3, dx4, dy4, dx5, dy5, d6 = self.popall()
|
|
dx = dx1 + dx2 + dx3 + dx4 + dx5
|
|
dy = dy1 + dy2 + dy3 + dy4 + dy5
|
|
if abs(dx) > abs(dy):
|
|
dx6 = d6
|
|
dy6 = -dy
|
|
else:
|
|
dx6 = -dx
|
|
dy6 = d6
|
|
self.rCurveTo((dx1, dy1), (dx2, dy2), (dx3, dy3))
|
|
self.rCurveTo((dx4, dy4), (dx5, dy5), (dx6, dy6))
|
|
|
|
# misc
|
|
def op_and(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_or(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_not(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_store(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_abs(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_add(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_sub(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_div(self, index):
|
|
num2 = self.pop()
|
|
num1 = self.pop()
|
|
d1 = num1 // num2
|
|
d2 = num1 / num2
|
|
if d1 == d2:
|
|
self.push(d1)
|
|
else:
|
|
self.push(d2)
|
|
|
|
def op_load(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_neg(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_eq(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_drop(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_put(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_get(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_ifelse(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_random(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_mul(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_sqrt(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_dup(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_exch(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_index(self, index):
|
|
raise NotImplementedError
|
|
|
|
def op_roll(self, index):
|
|
raise NotImplementedError
|
|
|
|
#
|
|
# miscellaneous helpers
|
|
#
|
|
def alternatingLineto(self, isHorizontal):
|
|
args = self.popall()
|
|
for arg in args:
|
|
if isHorizontal:
|
|
point = (arg, 0)
|
|
else:
|
|
point = (0, arg)
|
|
self.rLineTo(point)
|
|
isHorizontal = not isHorizontal
|
|
|
|
def vcurveto(self, args):
|
|
dya, dxb, dyb, dxc = args[:4]
|
|
args = args[4:]
|
|
if len(args) == 1:
|
|
dyc = args[0]
|
|
args = []
|
|
else:
|
|
dyc = 0
|
|
self.rCurveTo((0, dya), (dxb, dyb), (dxc, dyc))
|
|
return args
|
|
|
|
def hcurveto(self, args):
|
|
dxa, dxb, dyb, dyc = args[:4]
|
|
args = args[4:]
|
|
if len(args) == 1:
|
|
dxc = args[0]
|
|
args = []
|
|
else:
|
|
dxc = 0
|
|
self.rCurveTo((dxa, 0), (dxb, dyb), (dxc, dyc))
|
|
return args
|
|
|
|
|
|
class T1OutlineExtractor(T2OutlineExtractor):
|
|
def __init__(self, pen, subrs):
|
|
self.pen = pen
|
|
self.subrs = subrs
|
|
self.reset()
|
|
|
|
def reset(self):
|
|
self.flexing = 0
|
|
self.width = 0
|
|
self.sbx = 0
|
|
T2OutlineExtractor.reset(self)
|
|
|
|
def endPath(self):
|
|
if self.sawMoveTo:
|
|
self.pen.endPath()
|
|
self.sawMoveTo = 0
|
|
|
|
def popallWidth(self, evenOdd=0):
|
|
return self.popall()
|
|
|
|
def exch(self):
|
|
stack = self.operandStack
|
|
stack[-1], stack[-2] = stack[-2], stack[-1]
|
|
|
|
#
|
|
# path constructors
|
|
#
|
|
def op_rmoveto(self, index):
|
|
if self.flexing:
|
|
return
|
|
self.endPath()
|
|
self.rMoveTo(self.popall())
|
|
|
|
def op_hmoveto(self, index):
|
|
if self.flexing:
|
|
# We must add a parameter to the stack if we are flexing
|
|
self.push(0)
|
|
return
|
|
self.endPath()
|
|
self.rMoveTo((self.popall()[0], 0))
|
|
|
|
def op_vmoveto(self, index):
|
|
if self.flexing:
|
|
# We must add a parameter to the stack if we are flexing
|
|
self.push(0)
|
|
self.exch()
|
|
return
|
|
self.endPath()
|
|
self.rMoveTo((0, self.popall()[0]))
|
|
|
|
def op_closepath(self, index):
|
|
self.closePath()
|
|
|
|
def op_setcurrentpoint(self, index):
|
|
args = self.popall()
|
|
x, y = args
|
|
self.currentPoint = x, y
|
|
|
|
def op_endchar(self, index):
|
|
self.endPath()
|
|
|
|
def op_hsbw(self, index):
|
|
sbx, wx = self.popall()
|
|
self.width = wx
|
|
self.sbx = sbx
|
|
self.currentPoint = sbx, self.currentPoint[1]
|
|
|
|
def op_sbw(self, index):
|
|
self.popall() # XXX
|
|
|
|
#
|
|
def op_callsubr(self, index):
|
|
subrIndex = self.pop()
|
|
subr = self.subrs[subrIndex]
|
|
self.execute(subr)
|
|
|
|
def op_callothersubr(self, index):
|
|
subrIndex = self.pop()
|
|
nArgs = self.pop()
|
|
# print nArgs, subrIndex, "callothersubr"
|
|
if subrIndex == 0 and nArgs == 3:
|
|
self.doFlex()
|
|
self.flexing = 0
|
|
elif subrIndex == 1 and nArgs == 0:
|
|
self.flexing = 1
|
|
# ignore...
|
|
|
|
def op_pop(self, index):
|
|
pass # ignore...
|
|
|
|
def doFlex(self):
|
|
finaly = self.pop()
|
|
finalx = self.pop()
|
|
self.pop() # flex height is unused
|
|
|
|
p3y = self.pop()
|
|
p3x = self.pop()
|
|
bcp4y = self.pop()
|
|
bcp4x = self.pop()
|
|
bcp3y = self.pop()
|
|
bcp3x = self.pop()
|
|
p2y = self.pop()
|
|
p2x = self.pop()
|
|
bcp2y = self.pop()
|
|
bcp2x = self.pop()
|
|
bcp1y = self.pop()
|
|
bcp1x = self.pop()
|
|
rpy = self.pop()
|
|
rpx = self.pop()
|
|
|
|
# call rrcurveto
|
|
self.push(bcp1x + rpx)
|
|
self.push(bcp1y + rpy)
|
|
self.push(bcp2x)
|
|
self.push(bcp2y)
|
|
self.push(p2x)
|
|
self.push(p2y)
|
|
self.op_rrcurveto(None)
|
|
|
|
# call rrcurveto
|
|
self.push(bcp3x)
|
|
self.push(bcp3y)
|
|
self.push(bcp4x)
|
|
self.push(bcp4y)
|
|
self.push(p3x)
|
|
self.push(p3y)
|
|
self.op_rrcurveto(None)
|
|
|
|
# Push back final coords so subr 0 can find them
|
|
self.push(finalx)
|
|
self.push(finaly)
|
|
|
|
def op_dotsection(self, index):
|
|
self.popall() # XXX
|
|
|
|
def op_hstem3(self, index):
|
|
self.popall() # XXX
|
|
|
|
def op_seac(self, index):
|
|
"asb adx ady bchar achar seac"
|
|
from fontTools.encodings.StandardEncoding import StandardEncoding
|
|
|
|
asb, adx, ady, bchar, achar = self.popall()
|
|
baseGlyph = StandardEncoding[bchar]
|
|
self.pen.addComponent(baseGlyph, (1, 0, 0, 1, 0, 0))
|
|
accentGlyph = StandardEncoding[achar]
|
|
adx = adx + self.sbx - asb # seac weirdness
|
|
self.pen.addComponent(accentGlyph, (1, 0, 0, 1, adx, ady))
|
|
|
|
def op_vstem3(self, index):
|
|
self.popall() # XXX
|
|
|
|
|
|
class T2CharString(object):
|
|
operandEncoding = t2OperandEncoding
|
|
operators, opcodes = buildOperatorDict(t2Operators)
|
|
decompilerClass = SimpleT2Decompiler
|
|
outlineExtractor = T2OutlineExtractor
|
|
|
|
def __init__(self, bytecode=None, program=None, private=None, globalSubrs=None):
|
|
if program is None:
|
|
program = []
|
|
self.bytecode = bytecode
|
|
self.program = program
|
|
self.private = private
|
|
self.globalSubrs = globalSubrs if globalSubrs is not None else []
|
|
self._cur_vsindex = None
|
|
|
|
def getNumRegions(self, vsindex=None):
|
|
pd = self.private
|
|
assert pd is not None
|
|
if vsindex is not None:
|
|
self._cur_vsindex = vsindex
|
|
elif self._cur_vsindex is None:
|
|
self._cur_vsindex = pd.vsindex if hasattr(pd, "vsindex") else 0
|
|
return pd.getNumRegions(self._cur_vsindex)
|
|
|
|
def __repr__(self):
|
|
if self.bytecode is None:
|
|
return "<%s (source) at %x>" % (self.__class__.__name__, id(self))
|
|
else:
|
|
return "<%s (bytecode) at %x>" % (self.__class__.__name__, id(self))
|
|
|
|
def getIntEncoder(self):
|
|
return encodeIntT2
|
|
|
|
def getFixedEncoder(self):
|
|
return encodeFixed
|
|
|
|
def decompile(self):
|
|
if not self.needsDecompilation():
|
|
return
|
|
subrs = getattr(self.private, "Subrs", [])
|
|
decompiler = self.decompilerClass(subrs, self.globalSubrs, self.private)
|
|
decompiler.execute(self)
|
|
|
|
def draw(self, pen, blender=None):
|
|
subrs = getattr(self.private, "Subrs", [])
|
|
extractor = self.outlineExtractor(
|
|
pen,
|
|
subrs,
|
|
self.globalSubrs,
|
|
self.private.nominalWidthX,
|
|
self.private.defaultWidthX,
|
|
self.private,
|
|
blender,
|
|
)
|
|
extractor.execute(self)
|
|
self.width = extractor.width
|
|
|
|
def calcBounds(self, glyphSet):
|
|
boundsPen = BoundsPen(glyphSet)
|
|
self.draw(boundsPen)
|
|
return boundsPen.bounds
|
|
|
|
def compile(self, isCFF2=False):
|
|
if self.bytecode is not None:
|
|
return
|
|
opcodes = self.opcodes
|
|
program = self.program
|
|
|
|
if isCFF2:
|
|
# If present, remove return and endchar operators.
|
|
if program and program[-1] in ("return", "endchar"):
|
|
program = program[:-1]
|
|
elif program and not isinstance(program[-1], str):
|
|
raise CharStringCompileError(
|
|
"T2CharString or Subr has items on the stack after last operator."
|
|
)
|
|
|
|
bytecode = []
|
|
encodeInt = self.getIntEncoder()
|
|
encodeFixed = self.getFixedEncoder()
|
|
i = 0
|
|
end = len(program)
|
|
while i < end:
|
|
token = program[i]
|
|
i = i + 1
|
|
if isinstance(token, str):
|
|
try:
|
|
bytecode.extend(bytechr(b) for b in opcodes[token])
|
|
except KeyError:
|
|
raise CharStringCompileError("illegal operator: %s" % token)
|
|
if token in ("hintmask", "cntrmask"):
|
|
bytecode.append(program[i]) # hint mask
|
|
i = i + 1
|
|
elif isinstance(token, int):
|
|
bytecode.append(encodeInt(token))
|
|
elif isinstance(token, float):
|
|
bytecode.append(encodeFixed(token))
|
|
else:
|
|
assert 0, "unsupported type: %s" % type(token)
|
|
try:
|
|
bytecode = bytesjoin(bytecode)
|
|
except TypeError:
|
|
log.error(bytecode)
|
|
raise
|
|
self.setBytecode(bytecode)
|
|
|
|
def needsDecompilation(self):
|
|
return self.bytecode is not None
|
|
|
|
def setProgram(self, program):
|
|
self.program = program
|
|
self.bytecode = None
|
|
|
|
def setBytecode(self, bytecode):
|
|
self.bytecode = bytecode
|
|
self.program = None
|
|
|
|
def getToken(self, index, len=len, byteord=byteord, isinstance=isinstance):
|
|
if self.bytecode is not None:
|
|
if index >= len(self.bytecode):
|
|
return None, 0, 0
|
|
b0 = byteord(self.bytecode[index])
|
|
index = index + 1
|
|
handler = self.operandEncoding[b0]
|
|
token, index = handler(self, b0, self.bytecode, index)
|
|
else:
|
|
if index >= len(self.program):
|
|
return None, 0, 0
|
|
token = self.program[index]
|
|
index = index + 1
|
|
isOperator = isinstance(token, str)
|
|
return token, isOperator, index
|
|
|
|
def getBytes(self, index, nBytes):
|
|
if self.bytecode is not None:
|
|
newIndex = index + nBytes
|
|
bytes = self.bytecode[index:newIndex]
|
|
index = newIndex
|
|
else:
|
|
bytes = self.program[index]
|
|
index = index + 1
|
|
assert len(bytes) == nBytes
|
|
return bytes, index
|
|
|
|
def handle_operator(self, operator):
|
|
return operator
|
|
|
|
def toXML(self, xmlWriter, ttFont=None):
|
|
from fontTools.misc.textTools import num2binary
|
|
|
|
if self.bytecode is not None:
|
|
xmlWriter.dumphex(self.bytecode)
|
|
else:
|
|
index = 0
|
|
args = []
|
|
while True:
|
|
token, isOperator, index = self.getToken(index)
|
|
if token is None:
|
|
break
|
|
if isOperator:
|
|
if token in ("hintmask", "cntrmask"):
|
|
hintMask, isOperator, index = self.getToken(index)
|
|
bits = []
|
|
for byte in hintMask:
|
|
bits.append(num2binary(byteord(byte), 8))
|
|
hintMask = strjoin(bits)
|
|
line = " ".join(args + [token, hintMask])
|
|
else:
|
|
line = " ".join(args + [token])
|
|
xmlWriter.write(line)
|
|
xmlWriter.newline()
|
|
args = []
|
|
else:
|
|
if isinstance(token, float):
|
|
token = floatToFixedToStr(token, precisionBits=16)
|
|
else:
|
|
token = str(token)
|
|
args.append(token)
|
|
if args:
|
|
# NOTE: only CFF2 charstrings/subrs can have numeric arguments on
|
|
# the stack after the last operator. Compiling this would fail if
|
|
# this is part of CFF 1.0 table.
|
|
line = " ".join(args)
|
|
xmlWriter.write(line)
|
|
|
|
def fromXML(self, name, attrs, content):
|
|
from fontTools.misc.textTools import binary2num, readHex
|
|
|
|
if attrs.get("raw"):
|
|
self.setBytecode(readHex(content))
|
|
return
|
|
content = strjoin(content)
|
|
content = content.split()
|
|
program = []
|
|
end = len(content)
|
|
i = 0
|
|
while i < end:
|
|
token = content[i]
|
|
i = i + 1
|
|
try:
|
|
token = int(token)
|
|
except ValueError:
|
|
try:
|
|
token = strToFixedToFloat(token, precisionBits=16)
|
|
except ValueError:
|
|
program.append(token)
|
|
if token in ("hintmask", "cntrmask"):
|
|
mask = content[i]
|
|
maskBytes = b""
|
|
for j in range(0, len(mask), 8):
|
|
maskBytes = maskBytes + bytechr(binary2num(mask[j : j + 8]))
|
|
program.append(maskBytes)
|
|
i = i + 1
|
|
else:
|
|
program.append(token)
|
|
else:
|
|
program.append(token)
|
|
self.setProgram(program)
|
|
|
|
|
|
class T1CharString(T2CharString):
|
|
operandEncoding = t1OperandEncoding
|
|
operators, opcodes = buildOperatorDict(t1Operators)
|
|
|
|
def __init__(self, bytecode=None, program=None, subrs=None):
|
|
super().__init__(bytecode, program)
|
|
self.subrs = subrs
|
|
|
|
def getIntEncoder(self):
|
|
return encodeIntT1
|
|
|
|
def getFixedEncoder(self):
|
|
def encodeFixed(value):
|
|
raise TypeError("Type 1 charstrings don't support floating point operands")
|
|
|
|
def decompile(self):
|
|
if self.bytecode is None:
|
|
return
|
|
program = []
|
|
index = 0
|
|
while True:
|
|
token, isOperator, index = self.getToken(index)
|
|
if token is None:
|
|
break
|
|
program.append(token)
|
|
self.setProgram(program)
|
|
|
|
def draw(self, pen):
|
|
extractor = T1OutlineExtractor(pen, self.subrs)
|
|
extractor.execute(self)
|
|
self.width = extractor.width
|
|
|
|
|
|
class DictDecompiler(object):
|
|
operandEncoding = cffDictOperandEncoding
|
|
|
|
def __init__(self, strings, parent=None):
|
|
self.stack = []
|
|
self.strings = strings
|
|
self.dict = {}
|
|
self.parent = parent
|
|
|
|
def getDict(self):
|
|
assert len(self.stack) == 0, "non-empty stack"
|
|
return self.dict
|
|
|
|
def decompile(self, data):
|
|
index = 0
|
|
lenData = len(data)
|
|
push = self.stack.append
|
|
while index < lenData:
|
|
b0 = byteord(data[index])
|
|
index = index + 1
|
|
handler = self.operandEncoding[b0]
|
|
value, index = handler(self, b0, data, index)
|
|
if value is not None:
|
|
push(value)
|
|
|
|
def pop(self):
|
|
value = self.stack[-1]
|
|
del self.stack[-1]
|
|
return value
|
|
|
|
def popall(self):
|
|
args = self.stack[:]
|
|
del self.stack[:]
|
|
return args
|
|
|
|
def handle_operator(self, operator):
|
|
operator, argType = operator
|
|
if isinstance(argType, tuple):
|
|
value = ()
|
|
for i in range(len(argType) - 1, -1, -1):
|
|
arg = argType[i]
|
|
arghandler = getattr(self, "arg_" + arg)
|
|
value = (arghandler(operator),) + value
|
|
else:
|
|
arghandler = getattr(self, "arg_" + argType)
|
|
value = arghandler(operator)
|
|
if operator == "blend":
|
|
self.stack.extend(value)
|
|
else:
|
|
self.dict[operator] = value
|
|
|
|
def arg_number(self, name):
|
|
if isinstance(self.stack[0], list):
|
|
out = self.arg_blend_number(self.stack)
|
|
else:
|
|
out = self.pop()
|
|
return out
|
|
|
|
def arg_blend_number(self, name):
|
|
out = []
|
|
blendArgs = self.pop()
|
|
numMasters = len(blendArgs)
|
|
out.append(blendArgs)
|
|
out.append("blend")
|
|
dummy = self.popall()
|
|
return blendArgs
|
|
|
|
def arg_SID(self, name):
|
|
return self.strings[self.pop()]
|
|
|
|
def arg_array(self, name):
|
|
return self.popall()
|
|
|
|
def arg_blendList(self, name):
|
|
"""
|
|
There may be non-blend args at the top of the stack. We first calculate
|
|
where the blend args start in the stack. These are the last
|
|
numMasters*numBlends) +1 args.
|
|
The blend args starts with numMasters relative coordinate values, the BlueValues in the list from the default master font. This is followed by
|
|
numBlends list of values. Each of value in one of these lists is the
|
|
Variable Font delta for the matching region.
|
|
|
|
We re-arrange this to be a list of numMaster entries. Each entry starts with the corresponding default font relative value, and is followed by
|
|
the delta values. We then convert the default values, the first item in each entry, to an absolute value.
|
|
"""
|
|
vsindex = self.dict.get("vsindex", 0)
|
|
numMasters = (
|
|
self.parent.getNumRegions(vsindex) + 1
|
|
) # only a PrivateDict has blended ops.
|
|
numBlends = self.pop()
|
|
args = self.popall()
|
|
numArgs = len(args)
|
|
# The spec says that there should be no non-blended Blue Values,.
|
|
assert numArgs == numMasters * numBlends
|
|
value = [None] * numBlends
|
|
numDeltas = numMasters - 1
|
|
i = 0
|
|
prevVal = 0
|
|
while i < numBlends:
|
|
newVal = args[i] + prevVal
|
|
prevVal = newVal
|
|
masterOffset = numBlends + (i * numDeltas)
|
|
blendList = [newVal] + args[masterOffset : masterOffset + numDeltas]
|
|
value[i] = blendList
|
|
i += 1
|
|
return value
|
|
|
|
def arg_delta(self, name):
|
|
valueList = self.popall()
|
|
out = []
|
|
if valueList and isinstance(valueList[0], list):
|
|
# arg_blendList() has already converted these to absolute values.
|
|
out = valueList
|
|
else:
|
|
current = 0
|
|
for v in valueList:
|
|
current = current + v
|
|
out.append(current)
|
|
return out
|
|
|
|
|
|
def calcSubrBias(subrs):
|
|
nSubrs = len(subrs)
|
|
if nSubrs < 1240:
|
|
bias = 107
|
|
elif nSubrs < 33900:
|
|
bias = 1131
|
|
else:
|
|
bias = 32768
|
|
return bias
|