mirror of
https://github.com/rsms/inter.git
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354 lines
11 KiB
Python
Executable file
354 lines
11 KiB
Python
Executable file
#!/usr/bin/env python
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# encoding: utf8
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from __future__ import print_function
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import os, sys, plistlib, re
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from collections import OrderedDict
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from ConfigParser import RawConfigParser
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from argparse import ArgumentParser
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from fontTools import ttLib
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from robofab.objects.objectsRF import OpenFont
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# Regex matching "default" glyph names, like "uni2043" and "u01C5"
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uniNameRe = re.compile(r'^u(?:ni)([0-9A-F]{4,8})$')
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def unicodeForDefaultGlyphName(glyphName):
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m = uniNameRe.match(glyphName)
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if m is not None:
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try:
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return int(m.group(1), 16)
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except:
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pass
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return None
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def canonicalGlyphName(glyphName, uc2names):
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uc = unicodeForDefaultGlyphName(glyphName)
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if uc is not None:
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names = uc2names.get(uc)
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if names is not None and len(names) > 0:
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return names[0]
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return glyphName
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def parseGlyphComposition(composite):
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c = composite.split("=")
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d = c[1].split("/")
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glyphName = d[0]
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if len(d) == 1:
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offset = [0, 0]
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else:
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offset = [int(i) for i in d[1].split(",")]
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accentString = c[0]
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accents = accentString.split("+")
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baseName = accents.pop(0)
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accentNames = [i.split(":") for i in accents]
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return (glyphName, baseName, accentNames, offset)
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def loadGlyphCompositions(filename): # { glyphName => (baseName, accentNames, offset) }
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compositions = OrderedDict()
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with open(filename, 'r') as f:
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for line in f:
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line = line.strip()
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if len(line) > 0 and line[0] != '#':
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glyphName, baseName, accentNames, offset = parseGlyphComposition(line)
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compositions[glyphName] = (baseName, accentNames, offset)
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return compositions
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def loadAGL(filename): # -> { 2126: 'Omega', ... }
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m = {}
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with open(filename, 'r') as f:
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for line in f:
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# Omega;2126
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# dalethatafpatah;05D3 05B2 # higher-level combinations; ignored
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line = line.strip()
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if len(line) > 0 and line[0] != '#':
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name, uc = tuple([c.strip() for c in line.split(';')])
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if uc.find(' ') == -1:
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# it's a 1:1 mapping
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m[int(uc, 16)] = name
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return m
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def loadLocalNamesDB(fonts, agl, diacriticComps):
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uc2names = None # { 2126: ['Omega', ...], ...}
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allNames = set() # set('Omega', ...)
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for font in fonts:
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_uc2names = font.getCharacterMapping() # { 2126: ['Omega', ...], ...}
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if uc2names is None:
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uc2names = _uc2names
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else:
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for uc, _names in _uc2names.iteritems():
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names = uc2names.setdefault(uc, [])
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for name in _names:
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if name not in names:
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names.append(name)
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for g in font:
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allNames.add(g.name)
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# agl { 2126: 'Omega', ...} -> { 'Omega': [2126, ...], ...}
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aglName2Ucs = {}
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for uc, name in agl.iteritems():
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aglName2Ucs.setdefault(name, []).append(uc)
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for glyphName, comp in diacriticComps.iteritems():
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aglUCs = aglName2Ucs.get(glyphName)
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if aglUCs is None:
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uc = unicodeForDefaultGlyphName(glyphName)
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if uc is not None:
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glyphName2 = agl.get(uc)
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if glyphName2 is not None:
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glyphName = glyphName2
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names = uc2names.setdefault(uc, [])
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if glyphName not in names:
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names.append(glyphName)
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allNames.add(glyphName)
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else:
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allNames.add(glyphName)
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for uc in aglUCs:
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names = uc2names.get(uc, [])
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if glyphName not in names:
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names.append(glyphName)
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uc2names[uc] = names
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name2ucs = {} # { 'Omega': [2126, ...], ...}
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for uc, names in uc2names.iteritems():
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for name in names:
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name2ucs.setdefault(name, set()).add(uc)
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return uc2names, name2ucs, allNames
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# def getNameToGroupsMap(groups): # => { glyphName => set(groupName) }
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# nameMap = {}
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# for groupName, glyphNames in groups.iteritems():
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# for glyphName in glyphNames:
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# nameMap.setdefault(glyphName, set()).add(groupName)
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# return nameMap
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# def inspectKerning(kerning):
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# leftIndex = {} # { glyph-name => <ref to plist right-hand side dict> }
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# rightIndex = {} # { glyph-name => [(left-hand-side-name, kernVal), ...] }
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# rightGroupIndex = {} # { group-name => [(left-hand-side-name, kernVal), ...] }
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# for leftName, right in kerning.iteritems():
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# if leftName[0] != '@':
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# leftIndex[leftName] = right
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# for rightName, kernVal in right.iteritems():
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# if rightName[0] != '@':
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# rightIndex.setdefault(rightName, []).append((leftName, kernVal))
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# else:
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# rightGroupIndex.setdefault(rightName, []).append((leftName, kernVal))
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# return leftIndex, rightIndex, rightGroupIndex
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class RefTracker:
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def __init__(self):
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self.refs = {}
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def incr(self, name):
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self.refs[name] = self.refs.get(name, 0) + 1
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def decr(self, name): # => bool hasNoRefs
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r = self.refs.get(name)
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if r is None:
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raise Exception('decr untracked ref ' + repr(name))
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if r < 1:
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raise Exception('decr already zero ref ' + repr(name))
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if r == 1:
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del self.refs[name]
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return True
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self.refs[name] = r - 1
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def __contains__(self, name):
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return name in self.refs
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def main(argv=None):
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argparser = ArgumentParser(description='Remove unused kerning')
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argparser.add_argument(
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'-dry', dest='dryRun', action='store_const', const=True, default=False,
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help='Do not modify anything, but instead just print what would happen.')
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argparser.add_argument(
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'fontPaths', metavar='<ufofile>', type=str, nargs='+', help='UFO fonts to update')
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args = argparser.parse_args(argv)
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dryRun = args.dryRun
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agl = loadAGL('src/glyphlist.txt') # { 2126: 'Omega', ... }
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diacriticComps = loadGlyphCompositions('src/diacritics.txt') # {glyphName => (baseName, a, o)}
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for fontPath in args.fontPaths:
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print(fontPath)
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groupsFilename = os.path.join(fontPath, 'groups.plist')
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kerningFilename = os.path.join(fontPath, 'kerning.plist')
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groups = plistlib.readPlist(groupsFilename) # { groupName => [glyphName] }
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kerning = plistlib.readPlist(kerningFilename) # { leftName => {rightName => kernVal} }
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font = OpenFont(fontPath)
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uc2names, name2ucs, allNames = loadLocalNamesDB([font], agl, diacriticComps)
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# start with eliminating non-existent glyphs from groups and completely
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# eliminate groups with all-dead glyphs.
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eliminatedGroups = set()
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for groupName, glyphNames in list(groups.items()):
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glyphNames2 = []
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for name in glyphNames:
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if name in allNames:
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glyphNames2.append(name)
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else:
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name2 = canonicalGlyphName(name, uc2names)
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if name2 != name and name2 in allNames:
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print('group: rename glyph', name, '->', name2)
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glyphNames2.append(name2)
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if len(glyphNames2) == 0:
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print('group: eliminate', groupName)
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eliminatedGroups.add(groupName)
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del groups[groupName]
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elif len(glyphNames2) != len(glyphNames):
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print('group: shrink', groupName)
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groups[groupName] = glyphNames2
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# now eliminate kerning
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groupRefs = RefTracker() # tracks group references, so we can eliminate unreachable ones
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for leftName, right in list(kerning.items()):
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leftIsGroup = leftName[0] == '@'
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if leftIsGroup:
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if leftName in eliminatedGroups:
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print('kerning: eliminate LHS', leftName)
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del kerning[leftName]
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continue
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groupRefs.incr(leftName)
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else:
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if leftName not in allNames:
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print('kerning: eliminate LHS', leftName)
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del kerning[leftName]
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continue
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right2 = {}
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for rightName, kernVal in right.iteritems():
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rightIsGroup = rightName[0] == '@'
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if rightIsGroup:
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if rightIsGroup in eliminatedGroups:
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print('kerning: eliminate RHS group', rightName)
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else:
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groupRefs.incr(rightName)
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right2[rightName] = kernVal
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else:
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if rightName not in allNames:
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# maybe an unnamed glyph?
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rightName2 = canonicalGlyphName(rightName, uc2names)
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if rightName2 != rightName:
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print('kerning: rename & update RHS glyph', rightName, '->', rightName2)
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right2[rightName2] = kernVal
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else:
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print('kerning: eliminate RHS glyph', rightName)
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else:
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right2[rightName] = kernVal
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if len(right2) == 0:
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print('kerning: eliminate LHS', leftName)
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del kerning[leftName]
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if leftIsGroup:
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groupRefs.decr(leftName)
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else:
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kerning[leftName] = right2
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# eliminate any unreferenced groups
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for groupName, glyphNames in list(groups.items()):
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if not groupName in groupRefs:
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print('group: eliminate unreferenced group', groupName)
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del groups[groupName]
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# verify that there are no conflicting kerning pairs
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pairs = {} # { key => [...] }
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conflictingPairs = set()
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for leftName, right in kerning.iteritems():
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# expand LHS group -> names
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topLeftName = leftName
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for leftName in groups[leftName] if leftName[0] == '@' else [leftName]:
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if leftName not in allNames:
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raise Exception('unknown LHS glyph name ' + repr(leftName))
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keyPrefix = leftName + '+'
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for rightName, kernVal in right.iteritems():
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# expand RHS group -> names
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topRightName = rightName
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for rightName in groups[rightName] if rightName[0] == '@' else [rightName]:
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if rightName not in allNames:
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raise Exception('unknown RHS glyph name ' + repr(rightName))
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# print(leftName, '+', rightName, '=>', kernVal)
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key = keyPrefix + rightName
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isConflict = key in pairs
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pairs.setdefault(key, []).append(( topLeftName, topRightName, kernVal ))
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if isConflict:
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conflictingPairs.add(key)
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# # resolve pair conflicts by preferring pairs defined via group kerning
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# for key in conflictingPairs:
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# pairs = pairs[key]
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# print('kerning: conflicting pairs %r: %r' % (key, pairs))
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# bestPair = None
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# redundantPairs = []
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# for pair in pairs:
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# leftName, rightName, kernVal = pair
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# if bestPair is None:
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# bestPair = pair
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# else:
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# bestLeftName, bestRightName, _ = bestPair
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# bestScore = 0
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# score = 0
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# if bestLeftName[0] == '@': bestScore += 1
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# if bestRightName[0] == '@': bestScore += 1
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# if leftName[0] == '@': score += 1
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# if rightName[0] == '@': score += 1
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# if bestScore == 2:
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# # doesn't get better than this
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# break
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# elif score > bestScore:
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# redundantPairs.append(bestPair)
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# bestPair = pair
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# else:
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# redundantPairs.append(pair)
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# print('- keeping', bestPair)
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# print('- eliminating', redundantPairs)
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# for redundantPairs
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# # eliminate any unreferenced groups
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# for groupName, glyphNames in list(groups.items()):
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# if not groupName in groupRefs:
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# print('group: eliminate unreferenced group', groupName)
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# del groups[groupName]
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print('Write', groupsFilename)
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if not dryRun:
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plistlib.writePlist(groups, groupsFilename)
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print('Write', kerningFilename)
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if not dryRun:
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plistlib.writePlist(kerning, kerningFilename)
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# [end] for fontPath in args.fontPaths
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if __name__ == '__main__':
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main()
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