91bca42442
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@611 4cde692c-a291-49d1-8350-778aa11640f8
819 lines
25 KiB
Python
819 lines
25 KiB
Python
"""_g_l_y_f.py -- Converter classes for the 'glyf' table."""
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#
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# The Apple and MS rasterizers behave differently for
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# scaled composite components: one does scale first and then translate
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# and the other does it vice versa. MS defined some flags to indicate
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# the difference, but it seems nobody actually _sets_ those flags.
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#
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# Funny thing: Apple seems to _only_ do their thing in the
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# WE_HAVE_A_SCALE (eg. Chicago) case, and not when it's WE_HAVE_AN_X_AND_Y_SCALE
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# (eg. Charcoal)...
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#
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SCALE_COMPONENT_OFFSET_DEFAULT = 0 # 0 == MS, 1 == Apple
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import sys
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import struct, sstruct
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import DefaultTable
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from fontTools import ttLib
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from fontTools.misc.textTools import safeEval, readHex
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import ttProgram
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import array
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import numpy
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from types import StringType, TupleType
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import warnings
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class table__g_l_y_f(DefaultTable.DefaultTable):
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def decompile(self, data, ttFont):
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loca = ttFont['loca']
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last = int(loca[0])
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noname = 0
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self.glyphs = {}
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self.glyphOrder = glyphOrder = ttFont.getGlyphOrder()
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for i in range(0, len(loca)-1):
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try:
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glyphName = glyphOrder[i]
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except IndexError:
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noname = noname + 1
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glyphName = 'ttxautoglyph%s' % i
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next = int(loca[i+1])
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glyphdata = data[last:next]
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if len(glyphdata) <> (next - last):
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raise ttLib.TTLibError, "not enough 'glyf' table data"
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glyph = Glyph(glyphdata)
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self.glyphs[glyphName] = glyph
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last = next
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# this should become a warning:
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#if len(data) > next:
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# raise ttLib.TTLibError, "too much 'glyf' table data"
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if noname:
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warnings.warn('%s glyphs have no name' % i)
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def compile(self, ttFont):
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if not hasattr(self, "glyphOrder"):
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self.glyphOrder = ttFont.getGlyphOrder()
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import string
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locations = []
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currentLocation = 0
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dataList = []
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recalcBBoxes = ttFont.recalcBBoxes
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for glyphName in self.glyphOrder:
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glyph = self.glyphs[glyphName]
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glyphData = glyph.compile(self, recalcBBoxes)
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locations.append(currentLocation)
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currentLocation = currentLocation + len(glyphData)
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dataList.append(glyphData)
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locations.append(currentLocation)
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data = string.join(dataList, "")
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ttFont['loca'].set(locations)
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ttFont['maxp'].numGlyphs = len(self.glyphs)
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return data
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def toXML(self, writer, ttFont, progress=None):
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writer.newline()
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glyphNames = ttFont.getGlyphNames()
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writer.comment("The xMin, yMin, xMax and yMax values\nwill be recalculated by the compiler.")
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writer.newline()
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writer.newline()
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counter = 0
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progressStep = 10
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numGlyphs = len(glyphNames)
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for glyphName in glyphNames:
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if not counter % progressStep and progress is not None:
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progress.setLabel("Dumping 'glyf' table... (%s)" % glyphName)
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progress.increment(progressStep / float(numGlyphs))
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counter = counter + 1
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glyph = self[glyphName]
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if glyph.numberOfContours:
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writer.begintag('TTGlyph', [
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("name", glyphName),
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("xMin", glyph.xMin),
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("yMin", glyph.yMin),
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("xMax", glyph.xMax),
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("yMax", glyph.yMax),
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])
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writer.newline()
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glyph.toXML(writer, ttFont)
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writer.endtag('TTGlyph')
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writer.newline()
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else:
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writer.simpletag('TTGlyph', name=glyphName)
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writer.comment("contains no outline data")
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writer.newline()
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writer.newline()
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def fromXML(self, (name, attrs, content), ttFont):
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if name <> "TTGlyph":
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return
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if not hasattr(self, "glyphs"):
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self.glyphs = {}
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if not hasattr(self, "glyphOrder"):
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self.glyphOrder = ttFont.getGlyphOrder()
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glyphName = attrs["name"]
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if ttFont.verbose:
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ttLib.debugmsg("unpacking glyph '%s'" % glyphName)
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glyph = Glyph()
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for attr in ['xMin', 'yMin', 'xMax', 'yMax']:
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setattr(glyph, attr, safeEval(attrs.get(attr, '0')))
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self.glyphs[glyphName] = glyph
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for element in content:
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if type(element) <> TupleType:
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continue
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glyph.fromXML(element, ttFont)
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if not ttFont.recalcBBoxes:
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glyph.compact(self, 0)
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def setGlyphOrder(self, glyphOrder):
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self.glyphOrder = glyphOrder
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def getGlyphName(self, glyphID):
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return self.glyphOrder[glyphID]
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def getGlyphID(self, glyphName):
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# XXX optimize with reverse dict!!!
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return self.glyphOrder.index(glyphName)
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def keys(self):
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return self.glyphs.keys()
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def has_key(self, glyphName):
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return self.glyphs.has_key(glyphName)
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__contains__ = has_key
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def __getitem__(self, glyphName):
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glyph = self.glyphs[glyphName]
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glyph.expand(self)
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return glyph
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def __setitem__(self, glyphName, glyph):
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self.glyphs[glyphName] = glyph
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if glyphName not in self.glyphOrder:
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self.glyphOrder.append(glyphName)
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def __delitem__(self, glyphName):
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del self.glyphs[glyphName]
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self.glyphOrder.remove(glyphName)
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def __len__(self):
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assert len(self.glyphOrder) == len(self.glyphs)
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return len(self.glyphs)
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glyphHeaderFormat = """
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> # big endian
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numberOfContours: h
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xMin: h
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yMin: h
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xMax: h
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yMax: h
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"""
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# flags
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flagOnCurve = 0x01
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flagXShort = 0x02
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flagYShort = 0x04
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flagRepeat = 0x08
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flagXsame = 0x10
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flagYsame = 0x20
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flagReserved1 = 0x40
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flagReserved2 = 0x80
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ARG_1_AND_2_ARE_WORDS = 0x0001 # if set args are words otherwise they are bytes
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ARGS_ARE_XY_VALUES = 0x0002 # if set args are xy values, otherwise they are points
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ROUND_XY_TO_GRID = 0x0004 # for the xy values if above is true
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WE_HAVE_A_SCALE = 0x0008 # Sx = Sy, otherwise scale == 1.0
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NON_OVERLAPPING = 0x0010 # set to same value for all components (obsolete!)
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MORE_COMPONENTS = 0x0020 # indicates at least one more glyph after this one
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WE_HAVE_AN_X_AND_Y_SCALE = 0x0040 # Sx, Sy
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WE_HAVE_A_TWO_BY_TWO = 0x0080 # t00, t01, t10, t11
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WE_HAVE_INSTRUCTIONS = 0x0100 # instructions follow
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USE_MY_METRICS = 0x0200 # apply these metrics to parent glyph
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OVERLAP_COMPOUND = 0x0400 # used by Apple in GX fonts
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SCALED_COMPONENT_OFFSET = 0x0800 # composite designed to have the component offset scaled (designed for Apple)
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UNSCALED_COMPONENT_OFFSET = 0x1000 # composite designed not to have the component offset scaled (designed for MS)
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class Glyph:
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def __init__(self, data=""):
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if not data:
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# empty char
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self.numberOfContours = 0
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return
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self.data = data
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def compact(self, glyfTable, recalcBBoxes=1):
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data = self.compile(glyfTable, recalcBBoxes)
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self.__dict__.clear()
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self.data = data
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def expand(self, glyfTable):
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if not hasattr(self, "data"):
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# already unpacked
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return
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if not self.data:
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# empty char
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self.numberOfContours = 0
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return
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dummy, data = sstruct.unpack2(glyphHeaderFormat, self.data, self)
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del self.data
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if self.isComposite():
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self.decompileComponents(data, glyfTable)
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else:
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self.decompileCoordinates(data)
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def compile(self, glyfTable, recalcBBoxes=1):
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if hasattr(self, "data"):
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return self.data
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if self.numberOfContours == 0:
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return ""
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if recalcBBoxes:
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self.recalcBounds(glyfTable)
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data = sstruct.pack(glyphHeaderFormat, self)
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if self.isComposite():
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data = data + self.compileComponents(glyfTable)
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else:
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data = data + self.compileCoordinates()
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# From the spec: "Note that the local offsets should be word-aligned"
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# From a later MS spec: "Note that the local offsets should be long-aligned"
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# Let's be modern and align on 4-byte boundaries.
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if len(data) % 4:
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# add pad bytes
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nPadBytes = 4 - (len(data) % 4)
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data = data + "\0" * nPadBytes
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return data
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def toXML(self, writer, ttFont):
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if self.isComposite():
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for compo in self.components:
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compo.toXML(writer, ttFont)
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if hasattr(self, "program"):
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writer.begintag("instructions")
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self.program.toXML(writer, ttFont)
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writer.endtag("instructions")
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writer.newline()
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else:
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last = 0
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for i in range(self.numberOfContours):
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writer.begintag("contour")
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writer.newline()
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for j in range(last, self.endPtsOfContours[i] + 1):
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writer.simpletag("pt", [
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("x", self.coordinates[j][0]),
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("y", self.coordinates[j][1]),
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("on", self.flags[j] & flagOnCurve)])
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writer.newline()
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last = self.endPtsOfContours[i] + 1
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writer.endtag("contour")
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writer.newline()
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if self.numberOfContours:
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writer.begintag("instructions")
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self.program.toXML(writer, ttFont)
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writer.endtag("instructions")
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writer.newline()
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def fromXML(self, (name, attrs, content), ttFont):
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if name == "contour":
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if self.numberOfContours < 0:
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raise ttLib.TTLibError, "can't mix composites and contours in glyph"
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self.numberOfContours = self.numberOfContours + 1
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coordinates = []
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flags = []
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for element in content:
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if type(element) <> TupleType:
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continue
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name, attrs, content = element
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if name <> "pt":
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continue # ignore anything but "pt"
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coordinates.append([safeEval(attrs["x"]), safeEval(attrs["y"])])
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flags.append(not not safeEval(attrs["on"]))
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coordinates = numpy.array(coordinates, numpy.int16)
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flags = numpy.array(flags, numpy.int8)
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if not hasattr(self, "coordinates"):
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self.coordinates = coordinates
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self.flags = flags
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self.endPtsOfContours = [len(coordinates)-1]
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else:
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self.coordinates = numpy.concatenate((self.coordinates, coordinates))
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self.flags = numpy.concatenate((self.flags, flags))
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self.endPtsOfContours.append(len(self.coordinates)-1)
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elif name == "component":
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if self.numberOfContours > 0:
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raise ttLib.TTLibError, "can't mix composites and contours in glyph"
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self.numberOfContours = -1
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if not hasattr(self, "components"):
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self.components = []
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component = GlyphComponent()
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self.components.append(component)
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component.fromXML((name, attrs, content), ttFont)
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elif name == "instructions":
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self.program = ttProgram.Program()
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for element in content:
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if type(element) <> TupleType:
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continue
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self.program.fromXML(element, ttFont)
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def getCompositeMaxpValues(self, glyfTable, maxComponentDepth=1):
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assert self.isComposite()
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nContours = 0
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nPoints = 0
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for compo in self.components:
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baseGlyph = glyfTable[compo.glyphName]
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if baseGlyph.numberOfContours == 0:
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continue
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elif baseGlyph.numberOfContours > 0:
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nP, nC = baseGlyph.getMaxpValues()
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else:
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nP, nC, maxComponentDepth = baseGlyph.getCompositeMaxpValues(
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glyfTable, maxComponentDepth + 1)
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nPoints = nPoints + nP
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nContours = nContours + nC
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return nPoints, nContours, maxComponentDepth
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def getMaxpValues(self):
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assert self.numberOfContours > 0
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return len(self.coordinates), len(self.endPtsOfContours)
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def decompileComponents(self, data, glyfTable):
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self.components = []
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more = 1
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haveInstructions = 0
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while more:
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component = GlyphComponent()
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more, haveInstr, data = component.decompile(data, glyfTable)
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haveInstructions = haveInstructions | haveInstr
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self.components.append(component)
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if haveInstructions:
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numInstructions, = struct.unpack(">h", data[:2])
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data = data[2:]
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self.program = ttProgram.Program()
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self.program.fromBytecode(data[:numInstructions])
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data = data[numInstructions:]
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assert len(data) < 4, "bad composite data"
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def decompileCoordinates(self, data):
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endPtsOfContours = array.array("h")
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endPtsOfContours.fromstring(data[:2*self.numberOfContours])
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if sys.byteorder <> "big":
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endPtsOfContours.byteswap()
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self.endPtsOfContours = endPtsOfContours.tolist()
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data = data[2*self.numberOfContours:]
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instructionLength, = struct.unpack(">h", data[:2])
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data = data[2:]
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self.program = ttProgram.Program()
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self.program.fromBytecode(data[:instructionLength])
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data = data[instructionLength:]
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nCoordinates = self.endPtsOfContours[-1] + 1
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flags, xCoordinates, yCoordinates = \
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self.decompileCoordinatesRaw(nCoordinates, data)
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# fill in repetitions and apply signs
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coordinates = numpy.zeros((nCoordinates, 2), numpy.int16)
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xIndex = 0
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yIndex = 0
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for i in range(nCoordinates):
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flag = flags[i]
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# x coordinate
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if flag & flagXShort:
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if flag & flagXsame:
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x = xCoordinates[xIndex]
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else:
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x = -xCoordinates[xIndex]
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xIndex = xIndex + 1
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elif flag & flagXsame:
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x = 0
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else:
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x = xCoordinates[xIndex]
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xIndex = xIndex + 1
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# y coordinate
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if flag & flagYShort:
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if flag & flagYsame:
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y = yCoordinates[yIndex]
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else:
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y = -yCoordinates[yIndex]
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yIndex = yIndex + 1
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elif flag & flagYsame:
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y = 0
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else:
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y = yCoordinates[yIndex]
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yIndex = yIndex + 1
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coordinates[i] = (x, y)
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assert xIndex == len(xCoordinates)
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assert yIndex == len(yCoordinates)
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# convert relative to absolute coordinates
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self.coordinates = numpy.add.accumulate(coordinates)
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# discard all flags but for "flagOnCurve"
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self.flags = numpy.bitwise_and(flags, flagOnCurve).astype(numpy.int8)
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def decompileCoordinatesRaw(self, nCoordinates, data):
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# unpack flags and prepare unpacking of coordinates
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flags = numpy.array([0] * nCoordinates, numpy.int8)
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# Warning: deep Python trickery going on. We use the struct module to unpack
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# the coordinates. We build a format string based on the flags, so we can
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# unpack the coordinates in one struct.unpack() call.
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xFormat = ">" # big endian
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yFormat = ">" # big endian
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i = j = 0
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while 1:
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flag = ord(data[i])
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i = i + 1
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repeat = 1
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if flag & flagRepeat:
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repeat = ord(data[i]) + 1
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i = i + 1
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for k in range(repeat):
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if flag & flagXShort:
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xFormat = xFormat + 'B'
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elif not (flag & flagXsame):
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xFormat = xFormat + 'h'
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if flag & flagYShort:
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yFormat = yFormat + 'B'
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elif not (flag & flagYsame):
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yFormat = yFormat + 'h'
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flags[j] = flag
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j = j + 1
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if j >= nCoordinates:
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break
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assert j == nCoordinates, "bad glyph flags"
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data = data[i:]
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# unpack raw coordinates, krrrrrr-tching!
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xDataLen = struct.calcsize(xFormat)
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yDataLen = struct.calcsize(yFormat)
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if not (0 <= (len(data) - (xDataLen + yDataLen)) < 4):
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raise ttLib.TTLibError, "bad glyph record (leftover bytes: %s)" % (len(data) - (xDataLen + yDataLen))
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xCoordinates = struct.unpack(xFormat, data[:xDataLen])
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yCoordinates = struct.unpack(yFormat, data[xDataLen:xDataLen+yDataLen])
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return flags, xCoordinates, yCoordinates
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def compileComponents(self, glyfTable):
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data = ""
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lastcomponent = len(self.components) - 1
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more = 1
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haveInstructions = 0
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for i in range(len(self.components)):
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if i == lastcomponent:
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haveInstructions = hasattr(self, "program")
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more = 0
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compo = self.components[i]
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data = data + compo.compile(more, haveInstructions, glyfTable)
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if haveInstructions:
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instructions = self.program.getBytecode()
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data = data + struct.pack(">h", len(instructions)) + instructions
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return data
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def compileCoordinates(self):
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assert len(self.coordinates) == len(self.flags)
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data = ""
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endPtsOfContours = array.array("h", self.endPtsOfContours)
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if sys.byteorder <> "big":
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endPtsOfContours.byteswap()
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data = data + endPtsOfContours.tostring()
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instructions = self.program.getBytecode()
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data = data + struct.pack(">h", len(instructions)) + instructions
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nCoordinates = len(self.coordinates)
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# make a copy
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coordinates = numpy.array(self.coordinates)
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# absolute to relative coordinates
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coordinates[1:] = numpy.subtract(coordinates[1:], coordinates[:-1])
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flags = self.flags
|
|
compressedflags = []
|
|
xPoints = []
|
|
yPoints = []
|
|
xFormat = ">"
|
|
yFormat = ">"
|
|
lastflag = None
|
|
repeat = 0
|
|
for i in range(len(coordinates)):
|
|
# Oh, the horrors of TrueType
|
|
flag = self.flags[i]
|
|
x, y = coordinates[i]
|
|
# do x
|
|
if x == 0:
|
|
flag = flag | flagXsame
|
|
elif -255 <= x <= 255:
|
|
flag = flag | flagXShort
|
|
if x > 0:
|
|
flag = flag | flagXsame
|
|
else:
|
|
x = -x
|
|
xPoints.append(x)
|
|
xFormat = xFormat + 'B'
|
|
else:
|
|
xPoints.append(x)
|
|
xFormat = xFormat + 'h'
|
|
# do y
|
|
if y == 0:
|
|
flag = flag | flagYsame
|
|
elif -255 <= y <= 255:
|
|
flag = flag | flagYShort
|
|
if y > 0:
|
|
flag = flag | flagYsame
|
|
else:
|
|
y = -y
|
|
yPoints.append(y)
|
|
yFormat = yFormat + 'B'
|
|
else:
|
|
yPoints.append(y)
|
|
yFormat = yFormat + 'h'
|
|
# handle repeating flags
|
|
if flag == lastflag:
|
|
repeat = repeat + 1
|
|
if repeat == 1:
|
|
compressedflags.append(flag)
|
|
elif repeat > 1:
|
|
compressedflags[-2] = flag | flagRepeat
|
|
compressedflags[-1] = repeat
|
|
else:
|
|
compressedflags[-1] = repeat
|
|
else:
|
|
repeat = 0
|
|
compressedflags.append(flag)
|
|
lastflag = flag
|
|
data = data + array.array("B", compressedflags).tostring()
|
|
xPoints = map(int, xPoints) # work around numpy vs. struct >= 2.5 bug
|
|
yPoints = map(int, yPoints)
|
|
data = data + apply(struct.pack, (xFormat,)+tuple(xPoints))
|
|
data = data + apply(struct.pack, (yFormat,)+tuple(yPoints))
|
|
return data
|
|
|
|
def recalcBounds(self, glyfTable):
|
|
coordinates, endPts, flags = self.getCoordinates(glyfTable)
|
|
if len(coordinates) > 0:
|
|
self.xMin, self.yMin = numpy.minimum.reduce(coordinates)
|
|
self.xMax, self.yMax = numpy.maximum.reduce(coordinates)
|
|
else:
|
|
self.xMin, self.yMin, self.xMax, self.yMax = (0, 0, 0, 0)
|
|
|
|
def isComposite(self):
|
|
return self.numberOfContours == -1
|
|
|
|
def __getitem__(self, componentIndex):
|
|
if not self.isComposite():
|
|
raise ttLib.TTLibError, "can't use glyph as sequence"
|
|
return self.components[componentIndex]
|
|
|
|
def getCoordinates(self, glyfTable):
|
|
if self.numberOfContours > 0:
|
|
return self.coordinates, self.endPtsOfContours, self.flags
|
|
elif self.isComposite():
|
|
# it's a composite
|
|
allCoords = None
|
|
allFlags = None
|
|
allEndPts = None
|
|
for compo in self.components:
|
|
g = glyfTable[compo.glyphName]
|
|
coordinates, endPts, flags = g.getCoordinates(glyfTable)
|
|
if hasattr(compo, "firstPt"):
|
|
# move according to two reference points
|
|
move = allCoords[compo.firstPt] - coordinates[compo.secondPt]
|
|
else:
|
|
move = compo.x, compo.y
|
|
|
|
if not hasattr(compo, "transform"):
|
|
if len(coordinates) > 0:
|
|
coordinates = coordinates + move # I love NumPy!
|
|
else:
|
|
apple_way = compo.flags & SCALED_COMPONENT_OFFSET
|
|
ms_way = compo.flags & UNSCALED_COMPONENT_OFFSET
|
|
assert not (apple_way and ms_way)
|
|
if not (apple_way or ms_way):
|
|
scale_component_offset = SCALE_COMPONENT_OFFSET_DEFAULT # see top of this file
|
|
else:
|
|
scale_component_offset = apple_way
|
|
if scale_component_offset:
|
|
# the Apple way: first move, then scale (ie. scale the component offset)
|
|
coordinates = coordinates + move
|
|
coordinates = numpy.dot(coordinates, compo.transform)
|
|
else:
|
|
# the MS way: first scale, then move
|
|
coordinates = numpy.dot(coordinates, compo.transform)
|
|
coordinates = coordinates + move
|
|
# due to the transformation the coords. are now floats;
|
|
# round them off nicely, and cast to short
|
|
coordinates = numpy.floor(coordinates + 0.5).astype(numpy.int16)
|
|
if allCoords is None or len(allCoords) == 0:
|
|
allCoords = coordinates
|
|
allEndPts = endPts
|
|
allFlags = flags
|
|
else:
|
|
allEndPts = allEndPts + (numpy.array(endPts) + len(allCoords)).tolist()
|
|
if len(coordinates) > 0:
|
|
allCoords = numpy.concatenate((allCoords, coordinates))
|
|
allFlags = numpy.concatenate((allFlags, flags))
|
|
return allCoords, allEndPts, allFlags
|
|
else:
|
|
return numpy.array([], numpy.int16), [], numpy.array([], numpy.int8)
|
|
|
|
def __cmp__(self, other):
|
|
if self.numberOfContours <= 0:
|
|
return cmp(self.__dict__, other.__dict__)
|
|
else:
|
|
if cmp(len(self.coordinates), len(other.coordinates)):
|
|
return 1
|
|
ctest = numpy.alltrue(numpy.alltrue(numpy.equal(self.coordinates, other.coordinates)))
|
|
ftest = numpy.alltrue(numpy.equal(self.flags, other.flags))
|
|
if not ctest or not ftest:
|
|
return 1
|
|
return (
|
|
cmp(self.endPtsOfContours, other.endPtsOfContours) or
|
|
cmp(self.program, other.instructions)
|
|
)
|
|
|
|
|
|
class GlyphComponent:
|
|
|
|
def __init__(self):
|
|
pass
|
|
|
|
def getComponentInfo(self):
|
|
"""Return the base glyph name and a transform."""
|
|
# XXX Ignoring self.firstPt & self.lastpt for now: I need to implement
|
|
# something equivalent in fontTools.objects.glyph (I'd rather not
|
|
# convert it to an absolute offset, since it is valuable information).
|
|
# This method will now raise "AttributeError: x" on glyphs that use
|
|
# this TT feature.
|
|
if hasattr(self, "transform"):
|
|
[[xx, xy], [yx, yy]] = self.transform
|
|
trans = (xx, xy, yx, yy, self.x, self.y)
|
|
else:
|
|
trans = (1, 0, 0, 1, self.x, self.y)
|
|
return self.glyphName, trans
|
|
|
|
def decompile(self, data, glyfTable):
|
|
flags, glyphID = struct.unpack(">HH", data[:4])
|
|
self.flags = int(flags)
|
|
glyphID = int(glyphID)
|
|
self.glyphName = glyfTable.getGlyphName(int(glyphID))
|
|
#print ">>", reprflag(self.flags)
|
|
data = data[4:]
|
|
|
|
if self.flags & ARG_1_AND_2_ARE_WORDS:
|
|
if self.flags & ARGS_ARE_XY_VALUES:
|
|
self.x, self.y = struct.unpack(">hh", data[:4])
|
|
else:
|
|
x, y = struct.unpack(">HH", data[:4])
|
|
self.firstPt, self.secondPt = int(x), int(y)
|
|
data = data[4:]
|
|
else:
|
|
if self.flags & ARGS_ARE_XY_VALUES:
|
|
self.x, self.y = struct.unpack(">bb", data[:2])
|
|
else:
|
|
x, y = struct.unpack(">BB", data[:2])
|
|
self.firstPt, self.secondPt = int(x), int(y)
|
|
data = data[2:]
|
|
|
|
if self.flags & WE_HAVE_A_SCALE:
|
|
scale, = struct.unpack(">h", data[:2])
|
|
self.transform = numpy.array(
|
|
[[scale, 0], [0, scale]]) / float(0x4000) # fixed 2.14
|
|
data = data[2:]
|
|
elif self.flags & WE_HAVE_AN_X_AND_Y_SCALE:
|
|
xscale, yscale = struct.unpack(">hh", data[:4])
|
|
self.transform = numpy.array(
|
|
[[xscale, 0], [0, yscale]]) / float(0x4000) # fixed 2.14
|
|
data = data[4:]
|
|
elif self.flags & WE_HAVE_A_TWO_BY_TWO:
|
|
(xscale, scale01,
|
|
scale10, yscale) = struct.unpack(">hhhh", data[:8])
|
|
self.transform = numpy.array(
|
|
[[xscale, scale01], [scale10, yscale]]) / float(0x4000) # fixed 2.14
|
|
data = data[8:]
|
|
more = self.flags & MORE_COMPONENTS
|
|
haveInstructions = self.flags & WE_HAVE_INSTRUCTIONS
|
|
self.flags = self.flags & (ROUND_XY_TO_GRID | USE_MY_METRICS |
|
|
SCALED_COMPONENT_OFFSET | UNSCALED_COMPONENT_OFFSET |
|
|
NON_OVERLAPPING)
|
|
return more, haveInstructions, data
|
|
|
|
def compile(self, more, haveInstructions, glyfTable):
|
|
data = ""
|
|
|
|
# reset all flags we will calculate ourselves
|
|
flags = self.flags & (ROUND_XY_TO_GRID | USE_MY_METRICS |
|
|
SCALED_COMPONENT_OFFSET | UNSCALED_COMPONENT_OFFSET |
|
|
NON_OVERLAPPING)
|
|
if more:
|
|
flags = flags | MORE_COMPONENTS
|
|
if haveInstructions:
|
|
flags = flags | WE_HAVE_INSTRUCTIONS
|
|
|
|
if hasattr(self, "firstPt"):
|
|
if (0 <= self.firstPt <= 255) and (0 <= self.secondPt <= 255):
|
|
data = data + struct.pack(">BB", self.firstPt, self.secondPt)
|
|
else:
|
|
data = data + struct.pack(">HH", self.firstPt, self.secondPt)
|
|
flags = flags | ARG_1_AND_2_ARE_WORDS
|
|
else:
|
|
flags = flags | ARGS_ARE_XY_VALUES
|
|
if (-128 <= self.x <= 127) and (-128 <= self.y <= 127):
|
|
data = data + struct.pack(">bb", self.x, self.y)
|
|
else:
|
|
data = data + struct.pack(">hh", self.x, self.y)
|
|
flags = flags | ARG_1_AND_2_ARE_WORDS
|
|
|
|
if hasattr(self, "transform"):
|
|
# XXX needs more testing
|
|
transform = numpy.floor(self.transform * 0x4000 + 0.5)
|
|
if transform[0][1] or transform[1][0]:
|
|
flags = flags | WE_HAVE_A_TWO_BY_TWO
|
|
data = data + struct.pack(">hhhh",
|
|
transform[0][0], transform[0][1],
|
|
transform[1][0], transform[1][1])
|
|
elif transform[0][0] <> transform[1][1]:
|
|
flags = flags | WE_HAVE_AN_X_AND_Y_SCALE
|
|
data = data + struct.pack(">hh",
|
|
transform[0][0], transform[1][1])
|
|
else:
|
|
flags = flags | WE_HAVE_A_SCALE
|
|
data = data + struct.pack(">h",
|
|
transform[0][0])
|
|
|
|
glyphID = glyfTable.getGlyphID(self.glyphName)
|
|
return struct.pack(">HH", flags, glyphID) + data
|
|
|
|
def toXML(self, writer, ttFont):
|
|
attrs = [("glyphName", self.glyphName)]
|
|
if not hasattr(self, "firstPt"):
|
|
attrs = attrs + [("x", self.x), ("y", self.y)]
|
|
else:
|
|
attrs = attrs + [("firstPt", self.firstPt), ("secondPt", self.secondPt)]
|
|
|
|
if hasattr(self, "transform"):
|
|
# XXX needs more testing
|
|
transform = self.transform
|
|
if transform[0][1] or transform[1][0]:
|
|
attrs = attrs + [
|
|
("scalex", transform[0][0]), ("scale01", transform[0][1]),
|
|
("scale10", transform[1][0]), ("scaley", transform[1][1]),
|
|
]
|
|
elif transform[0][0] <> transform[1][1]:
|
|
attrs = attrs + [
|
|
("scalex", transform[0][0]), ("scaley", transform[1][1]),
|
|
]
|
|
else:
|
|
attrs = attrs + [("scale", transform[0][0])]
|
|
attrs = attrs + [("flags", hex(self.flags))]
|
|
writer.simpletag("component", attrs)
|
|
writer.newline()
|
|
|
|
def fromXML(self, (name, attrs, content), ttFont):
|
|
self.glyphName = attrs["glyphName"]
|
|
if attrs.has_key("firstPt"):
|
|
self.firstPt = safeEval(attrs["firstPt"])
|
|
self.secondPt = safeEval(attrs["secondPt"])
|
|
else:
|
|
self.x = safeEval(attrs["x"])
|
|
self.y = safeEval(attrs["y"])
|
|
if attrs.has_key("scale01"):
|
|
scalex = safeEval(attrs["scalex"])
|
|
scale01 = safeEval(attrs["scale01"])
|
|
scale10 = safeEval(attrs["scale10"])
|
|
scaley = safeEval(attrs["scaley"])
|
|
self.transform = numpy.array([[scalex, scale01], [scale10, scaley]])
|
|
elif attrs.has_key("scalex"):
|
|
scalex = safeEval(attrs["scalex"])
|
|
scaley = safeEval(attrs["scaley"])
|
|
self.transform = numpy.array([[scalex, 0], [0, scaley]])
|
|
elif attrs.has_key("scale"):
|
|
scale = safeEval(attrs["scale"])
|
|
self.transform = numpy.array([[scale, 0], [0, scale]])
|
|
self.flags = safeEval(attrs["flags"])
|
|
|
|
def __cmp__(self, other):
|
|
if hasattr(self, "transform"):
|
|
if numpy.alltrue(numpy.equal(self.transform, other.transform)):
|
|
selfdict = self.__dict__.copy()
|
|
otherdict = other.__dict__.copy()
|
|
del selfdict["transform"]
|
|
del otherdict["transform"]
|
|
return cmp(selfdict, otherdict)
|
|
else:
|
|
return 1
|
|
else:
|
|
return cmp(self.__dict__, other.__dict__)
|
|
|
|
|
|
def reprflag(flag):
|
|
bin = ""
|
|
if type(flag) == StringType:
|
|
flag = ord(flag)
|
|
while flag:
|
|
if flag & 0x01:
|
|
bin = "1" + bin
|
|
else:
|
|
bin = "0" + bin
|
|
flag = flag >> 1
|
|
bin = (14 - len(bin)) * "0" + bin
|
|
return bin
|
|
|