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# Parse a GPOS ttx dump and output a cursive attachment .fea
import xml.etree.cElementTree as et
from fontTools.feaLib.ast import *
tree = et.parse("cursive.xml")
doc = tree.getroot()
glyphs = [x.attrib["value"] for x in tree.findall("Coverage/Glyph")]
recs = tree.findall("EntryExitRecord")
droplist = []
poslist = []
for i,rec in enumerate(recs):
entries = rec.findall("EntryAnchor")
exits = rec.findall("ExitAnchor")
if len(entries) > 0:
entryY = int(entries[0].find("YCoordinate").attrib["value"])
entryX = int(entries[0].find("XCoordinate").attrib["value"])
entryAnchor = Anchor(entryX, entryY)
else:
entryY = 0
entryAnchor = Anchor(0,0,name="NULL")
if len(exits) > 0:
exitY = int(exits[0].find("YCoordinate").attrib["value"])
exitX = int(exits[0].find("XCoordinate").attrib["value"])
exitAnchor = Anchor(exitX, exitY)
else:
exitY = 0
exitAnchor = Anchor(0,0,name="NULL")
drop = entryY - exitY
droplist.append((glyphs[i],drop))
poslist.append(CursivePosStatement(GlyphName(glyphs[i]), entryAnchor, exitAnchor))
droplist = sorted(droplist, key = lambda x:x[1])
import numpy as np
def groupByDrop(droplist, classname, bincount=10):
relevant = list(filter(lambda x: classname in x[0] , droplist))
dropValues = [ x[1] for x in relevant ]
edges = np.histogram_bin_edges(dropValues, bins = bincount)
middles = list((edges[0:-1] + edges[1:] ) /2)
groups = np.digitize(dropValues, edges) -1
binnedGlyphs = {}
for i,group in enumerate(groups):
if not group in binnedGlyphs:
binnedGlyphs[group] = []
binnedGlyphs[group].append(relevant[i][0])
middles.append(edges[-1])
classes = []
for k,v in binnedGlyphs.items():
classes.append(GlyphClassDefinition("%s_%i" % (classname,k), GlyphClass(v)))
classes.append(Comment("# average drop = %i\n" % middles[k]))
return binnedGlyphs, middles, classes
binnedMeds, medMiddles, medClasses = groupByDrop(droplist, "Med")
for x in medClasses:
print(x.asFea())
binnedInis, iniMiddles, iniClasses = groupByDrop(droplist, "Ini")
for x in iniClasses:
print(x.asFea())
binnedFins, finMiddles, finClasses = groupByDrop(droplist, "Fin")
for x in finClasses:
print(x.asFea())
print("feature curs {\n")
print("lookupflag IgnoreMarks;\n")
for x in poslist:
print(x.asFea())
print("} curs;")
# print("feature kern {\n")
# print("lookupflag IgnoreMarks;\n")
# for i in binnedInis.keys():
# for m1 in binnedMeds.keys():
# for f in binnedFins.keys():
# totalDrop = (iniMiddles[i] + medMiddles[m1] + finMiddles[f])
# print("\tposition @Ini_%i' <0 %i 0 0> @Med_%i @Fin_%i;" % (i, totalDrop, m1,f))
# for i in binnedInis.keys():
# for m1 in binnedMeds.keys():
# for m2 in binnedMeds.keys():
# for f in binnedFins.keys():
# totalDrop = (iniMiddles[i] + medMiddles[m1] + medMiddles[m2] + finMiddles[f])
# print("\tposition @Ini_%i' <0 %i 0 0> @Med_%i @Med_%i @Fin_%i;" % (i, totalDrop, m1,m2,f))
# print("} kern;")
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