subset.py revision 2007a491e31faa7ff30ce6a0a141f00357dbbe37
1# Copyright 2013 Google, Inc. All Rights Reserved. 2# 3# Google Author(s): Behdad Esfahbod 4 5"""Python OpenType Layout Subsetter. 6 7Later grown into full OpenType subsetter, supporting all standard tables. 8""" 9 10from __future__ import print_function, division, absolute_import 11from fontTools.misc.py23 import * 12from fontTools import ttLib 13from fontTools.ttLib.tables import otTables 14from fontTools.misc import psCharStrings 15from fontTools.pens import basePen 16import sys 17import struct 18import time 19import array 20 21 22def _add_method(*clazzes): 23 """Returns a decorator function that adds a new method to one or 24 more classes.""" 25 def wrapper(method): 26 for clazz in clazzes: 27 assert clazz.__name__ != 'DefaultTable', 'Oops, table class not found.' 28 assert not hasattr(clazz, method.__name__), \ 29 "Oops, class '%s' has method '%s'." % (clazz.__name__, 30 method.__name__) 31 setattr(clazz, method.__name__, method) 32 return None 33 return wrapper 34 35def _uniq_sort(l): 36 return sorted(set(l)) 37 38def _set_update(s, *others): 39 # Jython's set.update only takes one other argument. 40 # Emulate real set.update... 41 for other in others: 42 s.update(other) 43 44 45@_add_method(otTables.Coverage) 46def intersect(self, glyphs): 47 "Returns ascending list of matching coverage values." 48 return [i for i,g in enumerate(self.glyphs) if g in glyphs] 49 50@_add_method(otTables.Coverage) 51def intersect_glyphs(self, glyphs): 52 "Returns set of intersecting glyphs." 53 return set(g for g in self.glyphs if g in glyphs) 54 55@_add_method(otTables.Coverage) 56def subset(self, glyphs): 57 "Returns ascending list of remaining coverage values." 58 indices = self.intersect(glyphs) 59 self.glyphs = [g for g in self.glyphs if g in glyphs] 60 return indices 61 62@_add_method(otTables.Coverage) 63def remap(self, coverage_map): 64 "Remaps coverage." 65 self.glyphs = [self.glyphs[i] for i in coverage_map] 66 67@_add_method(otTables.ClassDef) 68def intersect(self, glyphs): 69 "Returns ascending list of matching class values." 70 return _uniq_sort( 71 ([0] if any(g not in self.classDefs for g in glyphs) else []) + 72 [v for g,v in self.classDefs.items() if g in glyphs]) 73 74@_add_method(otTables.ClassDef) 75def intersect_class(self, glyphs, klass): 76 "Returns set of glyphs matching class." 77 if klass == 0: 78 return set(g for g in glyphs if g not in self.classDefs) 79 return set(g for g,v in self.classDefs.items() 80 if v == klass and g in glyphs) 81 82@_add_method(otTables.ClassDef) 83def subset(self, glyphs, remap=False): 84 "Returns ascending list of remaining classes." 85 self.classDefs = dict((g,v) for g,v in self.classDefs.items() if g in glyphs) 86 # Note: while class 0 has the special meaning of "not matched", 87 # if no glyph will ever /not match/, we can optimize class 0 out too. 88 indices = _uniq_sort( 89 ([0] if any(g not in self.classDefs for g in glyphs) else []) + 90 list(self.classDefs.values())) 91 if remap: 92 self.remap(indices) 93 return indices 94 95@_add_method(otTables.ClassDef) 96def remap(self, class_map): 97 "Remaps classes." 98 self.classDefs = dict((g,class_map.index(v)) 99 for g,v in self.classDefs.items()) 100 101@_add_method(otTables.SingleSubst) 102def closure_glyphs(self, s, cur_glyphs=None): 103 if cur_glyphs is None: cur_glyphs = s.glyphs 104 s.glyphs.update(v for g,v in self.mapping.items() if g in cur_glyphs) 105 106@_add_method(otTables.SingleSubst) 107def subset_glyphs(self, s): 108 self.mapping = dict((g,v) for g,v in self.mapping.items() 109 if g in s.glyphs and v in s.glyphs) 110 return bool(self.mapping) 111 112@_add_method(otTables.MultipleSubst) 113def closure_glyphs(self, s, cur_glyphs=None): 114 if cur_glyphs is None: cur_glyphs = s.glyphs 115 indices = self.Coverage.intersect(cur_glyphs) 116 _set_update(s.glyphs, *(self.Sequence[i].Substitute for i in indices)) 117 118@_add_method(otTables.MultipleSubst) 119def subset_glyphs(self, s): 120 indices = self.Coverage.subset(s.glyphs) 121 self.Sequence = [self.Sequence[i] for i in indices] 122 # Now drop rules generating glyphs we don't want 123 indices = [i for i,seq in enumerate(self.Sequence) 124 if all(sub in s.glyphs for sub in seq.Substitute)] 125 self.Sequence = [self.Sequence[i] for i in indices] 126 self.Coverage.remap(indices) 127 self.SequenceCount = len(self.Sequence) 128 return bool(self.SequenceCount) 129 130@_add_method(otTables.AlternateSubst) 131def closure_glyphs(self, s, cur_glyphs=None): 132 if cur_glyphs is None: cur_glyphs = s.glyphs 133 _set_update(s.glyphs, *(vlist for g,vlist in self.alternates.items() 134 if g in cur_glyphs)) 135 136@_add_method(otTables.AlternateSubst) 137def subset_glyphs(self, s): 138 self.alternates = dict((g,vlist) 139 for g,vlist in self.alternates.items() 140 if g in s.glyphs and 141 all(v in s.glyphs for v in vlist)) 142 return bool(self.alternates) 143 144@_add_method(otTables.LigatureSubst) 145def closure_glyphs(self, s, cur_glyphs=None): 146 if cur_glyphs is None: cur_glyphs = s.glyphs 147 _set_update(s.glyphs, *([seq.LigGlyph for seq in seqs 148 if all(c in s.glyphs for c in seq.Component)] 149 for g,seqs in self.ligatures.items() 150 if g in cur_glyphs)) 151 152@_add_method(otTables.LigatureSubst) 153def subset_glyphs(self, s): 154 self.ligatures = dict((g,v) for g,v in self.ligatures.items() 155 if g in s.glyphs) 156 self.ligatures = dict((g,[seq for seq in seqs 157 if seq.LigGlyph in s.glyphs and 158 all(c in s.glyphs for c in seq.Component)]) 159 for g,seqs in self.ligatures.items()) 160 self.ligatures = dict((g,v) for g,v in self.ligatures.items() if v) 161 return bool(self.ligatures) 162 163@_add_method(otTables.ReverseChainSingleSubst) 164def closure_glyphs(self, s, cur_glyphs=None): 165 if cur_glyphs is None: cur_glyphs = s.glyphs 166 if self.Format == 1: 167 indices = self.Coverage.intersect(cur_glyphs) 168 if(not indices or 169 not all(c.intersect(s.glyphs) 170 for c in self.LookAheadCoverage + self.BacktrackCoverage)): 171 return 172 s.glyphs.update(self.Substitute[i] for i in indices) 173 else: 174 assert 0, "unknown format: %s" % self.Format 175 176@_add_method(otTables.ReverseChainSingleSubst) 177def subset_glyphs(self, s): 178 if self.Format == 1: 179 indices = self.Coverage.subset(s.glyphs) 180 self.Substitute = [self.Substitute[i] for i in indices] 181 # Now drop rules generating glyphs we don't want 182 indices = [i for i,sub in enumerate(self.Substitute) 183 if sub in s.glyphs] 184 self.Substitute = [self.Substitute[i] for i in indices] 185 self.Coverage.remap(indices) 186 self.GlyphCount = len(self.Substitute) 187 return bool(self.GlyphCount and 188 all(c.subset(s.glyphs) 189 for c in self.LookAheadCoverage+self.BacktrackCoverage)) 190 else: 191 assert 0, "unknown format: %s" % self.Format 192 193@_add_method(otTables.SinglePos) 194def subset_glyphs(self, s): 195 if self.Format == 1: 196 return len(self.Coverage.subset(s.glyphs)) 197 elif self.Format == 2: 198 indices = self.Coverage.subset(s.glyphs) 199 self.Value = [self.Value[i] for i in indices] 200 self.ValueCount = len(self.Value) 201 return bool(self.ValueCount) 202 else: 203 assert 0, "unknown format: %s" % self.Format 204 205@_add_method(otTables.SinglePos) 206def prune_post_subset(self, options): 207 if not options.hinting: 208 # Drop device tables 209 self.ValueFormat &= ~0x00F0 210 return True 211 212@_add_method(otTables.PairPos) 213def subset_glyphs(self, s): 214 if self.Format == 1: 215 indices = self.Coverage.subset(s.glyphs) 216 self.PairSet = [self.PairSet[i] for i in indices] 217 for p in self.PairSet: 218 p.PairValueRecord = [r for r in p.PairValueRecord 219 if r.SecondGlyph in s.glyphs] 220 p.PairValueCount = len(p.PairValueRecord) 221 self.PairSet = [p for p in self.PairSet if p.PairValueCount] 222 self.PairSetCount = len(self.PairSet) 223 return bool(self.PairSetCount) 224 elif self.Format == 2: 225 class1_map = self.ClassDef1.subset(s.glyphs, remap=True) 226 class2_map = self.ClassDef2.subset(s.glyphs, remap=True) 227 self.Class1Record = [self.Class1Record[i] for i in class1_map] 228 for c in self.Class1Record: 229 c.Class2Record = [c.Class2Record[i] for i in class2_map] 230 self.Class1Count = len(class1_map) 231 self.Class2Count = len(class2_map) 232 return bool(self.Class1Count and 233 self.Class2Count and 234 self.Coverage.subset(s.glyphs)) 235 else: 236 assert 0, "unknown format: %s" % self.Format 237 238@_add_method(otTables.PairPos) 239def prune_post_subset(self, options): 240 if not options.hinting: 241 # Drop device tables 242 self.ValueFormat1 &= ~0x00F0 243 self.ValueFormat2 &= ~0x00F0 244 return True 245 246@_add_method(otTables.CursivePos) 247def subset_glyphs(self, s): 248 if self.Format == 1: 249 indices = self.Coverage.subset(s.glyphs) 250 self.EntryExitRecord = [self.EntryExitRecord[i] for i in indices] 251 self.EntryExitCount = len(self.EntryExitRecord) 252 return bool(self.EntryExitCount) 253 else: 254 assert 0, "unknown format: %s" % self.Format 255 256@_add_method(otTables.Anchor) 257def prune_hints(self): 258 # Drop device tables / contour anchor point 259 self.ensureDecompiled() 260 self.Format = 1 261 262@_add_method(otTables.CursivePos) 263def prune_post_subset(self, options): 264 if not options.hinting: 265 for rec in self.EntryExitRecord: 266 if rec.EntryAnchor: rec.EntryAnchor.prune_hints() 267 if rec.ExitAnchor: rec.ExitAnchor.prune_hints() 268 return True 269 270@_add_method(otTables.MarkBasePos) 271def subset_glyphs(self, s): 272 if self.Format == 1: 273 mark_indices = self.MarkCoverage.subset(s.glyphs) 274 self.MarkArray.MarkRecord = [self.MarkArray.MarkRecord[i] 275 for i in mark_indices] 276 self.MarkArray.MarkCount = len(self.MarkArray.MarkRecord) 277 base_indices = self.BaseCoverage.subset(s.glyphs) 278 self.BaseArray.BaseRecord = [self.BaseArray.BaseRecord[i] 279 for i in base_indices] 280 self.BaseArray.BaseCount = len(self.BaseArray.BaseRecord) 281 # Prune empty classes 282 class_indices = _uniq_sort(v.Class for v in self.MarkArray.MarkRecord) 283 self.ClassCount = len(class_indices) 284 for m in self.MarkArray.MarkRecord: 285 m.Class = class_indices.index(m.Class) 286 for b in self.BaseArray.BaseRecord: 287 b.BaseAnchor = [b.BaseAnchor[i] for i in class_indices] 288 return bool(self.ClassCount and 289 self.MarkArray.MarkCount and 290 self.BaseArray.BaseCount) 291 else: 292 assert 0, "unknown format: %s" % self.Format 293 294@_add_method(otTables.MarkBasePos) 295def prune_post_subset(self, options): 296 if not options.hinting: 297 for m in self.MarkArray.MarkRecord: 298 if m.MarkAnchor: 299 m.MarkAnchor.prune_hints() 300 for b in self.BaseArray.BaseRecord: 301 for a in b.BaseAnchor: 302 if a: 303 a.prune_hints() 304 return True 305 306@_add_method(otTables.MarkLigPos) 307def subset_glyphs(self, s): 308 if self.Format == 1: 309 mark_indices = self.MarkCoverage.subset(s.glyphs) 310 self.MarkArray.MarkRecord = [self.MarkArray.MarkRecord[i] 311 for i in mark_indices] 312 self.MarkArray.MarkCount = len(self.MarkArray.MarkRecord) 313 ligature_indices = self.LigatureCoverage.subset(s.glyphs) 314 self.LigatureArray.LigatureAttach = [self.LigatureArray.LigatureAttach[i] 315 for i in ligature_indices] 316 self.LigatureArray.LigatureCount = len(self.LigatureArray.LigatureAttach) 317 # Prune empty classes 318 class_indices = _uniq_sort(v.Class for v in self.MarkArray.MarkRecord) 319 self.ClassCount = len(class_indices) 320 for m in self.MarkArray.MarkRecord: 321 m.Class = class_indices.index(m.Class) 322 for l in self.LigatureArray.LigatureAttach: 323 for c in l.ComponentRecord: 324 c.LigatureAnchor = [c.LigatureAnchor[i] for i in class_indices] 325 return bool(self.ClassCount and 326 self.MarkArray.MarkCount and 327 self.LigatureArray.LigatureCount) 328 else: 329 assert 0, "unknown format: %s" % self.Format 330 331@_add_method(otTables.MarkLigPos) 332def prune_post_subset(self, options): 333 if not options.hinting: 334 for m in self.MarkArray.MarkRecord: 335 if m.MarkAnchor: 336 m.MarkAnchor.prune_hints() 337 for l in self.LigatureArray.LigatureAttach: 338 for c in l.ComponentRecord: 339 for a in c.LigatureAnchor: 340 if a: 341 a.prune_hints() 342 return True 343 344@_add_method(otTables.MarkMarkPos) 345def subset_glyphs(self, s): 346 if self.Format == 1: 347 mark1_indices = self.Mark1Coverage.subset(s.glyphs) 348 self.Mark1Array.MarkRecord = [self.Mark1Array.MarkRecord[i] 349 for i in mark1_indices] 350 self.Mark1Array.MarkCount = len(self.Mark1Array.MarkRecord) 351 mark2_indices = self.Mark2Coverage.subset(s.glyphs) 352 self.Mark2Array.Mark2Record = [self.Mark2Array.Mark2Record[i] 353 for i in mark2_indices] 354 self.Mark2Array.MarkCount = len(self.Mark2Array.Mark2Record) 355 # Prune empty classes 356 class_indices = _uniq_sort(v.Class for v in self.Mark1Array.MarkRecord) 357 self.ClassCount = len(class_indices) 358 for m in self.Mark1Array.MarkRecord: 359 m.Class = class_indices.index(m.Class) 360 for b in self.Mark2Array.Mark2Record: 361 b.Mark2Anchor = [b.Mark2Anchor[i] for i in class_indices] 362 return bool(self.ClassCount and 363 self.Mark1Array.MarkCount and 364 self.Mark2Array.MarkCount) 365 else: 366 assert 0, "unknown format: %s" % self.Format 367 368@_add_method(otTables.MarkMarkPos) 369def prune_post_subset(self, options): 370 if not options.hinting: 371 # Drop device tables or contour anchor point 372 for m in self.Mark1Array.MarkRecord: 373 if m.MarkAnchor: 374 m.MarkAnchor.prune_hints() 375 for b in self.Mark2Array.Mark2Record: 376 for m in b.Mark2Anchor: 377 if m: 378 m.prune_hints() 379 return True 380 381@_add_method(otTables.SingleSubst, 382 otTables.MultipleSubst, 383 otTables.AlternateSubst, 384 otTables.LigatureSubst, 385 otTables.ReverseChainSingleSubst, 386 otTables.SinglePos, 387 otTables.PairPos, 388 otTables.CursivePos, 389 otTables.MarkBasePos, 390 otTables.MarkLigPos, 391 otTables.MarkMarkPos) 392def subset_lookups(self, lookup_indices): 393 pass 394 395@_add_method(otTables.SingleSubst, 396 otTables.MultipleSubst, 397 otTables.AlternateSubst, 398 otTables.LigatureSubst, 399 otTables.ReverseChainSingleSubst, 400 otTables.SinglePos, 401 otTables.PairPos, 402 otTables.CursivePos, 403 otTables.MarkBasePos, 404 otTables.MarkLigPos, 405 otTables.MarkMarkPos) 406def collect_lookups(self): 407 return [] 408 409@_add_method(otTables.SingleSubst, 410 otTables.MultipleSubst, 411 otTables.AlternateSubst, 412 otTables.LigatureSubst, 413 otTables.ContextSubst, 414 otTables.ChainContextSubst, 415 otTables.ReverseChainSingleSubst, 416 otTables.SinglePos, 417 otTables.PairPos, 418 otTables.CursivePos, 419 otTables.MarkBasePos, 420 otTables.MarkLigPos, 421 otTables.MarkMarkPos, 422 otTables.ContextPos, 423 otTables.ChainContextPos) 424def prune_pre_subset(self, options): 425 return True 426 427@_add_method(otTables.SingleSubst, 428 otTables.MultipleSubst, 429 otTables.AlternateSubst, 430 otTables.LigatureSubst, 431 otTables.ReverseChainSingleSubst, 432 otTables.ContextSubst, 433 otTables.ChainContextSubst, 434 otTables.ContextPos, 435 otTables.ChainContextPos) 436def prune_post_subset(self, options): 437 return True 438 439@_add_method(otTables.SingleSubst, 440 otTables.AlternateSubst, 441 otTables.ReverseChainSingleSubst) 442def may_have_non_1to1(self): 443 return False 444 445@_add_method(otTables.MultipleSubst, 446 otTables.LigatureSubst, 447 otTables.ContextSubst, 448 otTables.ChainContextSubst) 449def may_have_non_1to1(self): 450 return True 451 452@_add_method(otTables.ContextSubst, 453 otTables.ChainContextSubst, 454 otTables.ContextPos, 455 otTables.ChainContextPos) 456def __classify_context(self): 457 458 class ContextHelper(object): 459 def __init__(self, klass, Format): 460 if klass.__name__.endswith('Subst'): 461 Typ = 'Sub' 462 Type = 'Subst' 463 else: 464 Typ = 'Pos' 465 Type = 'Pos' 466 if klass.__name__.startswith('Chain'): 467 Chain = 'Chain' 468 else: 469 Chain = '' 470 ChainTyp = Chain+Typ 471 472 self.Typ = Typ 473 self.Type = Type 474 self.Chain = Chain 475 self.ChainTyp = ChainTyp 476 477 self.LookupRecord = Type+'LookupRecord' 478 479 if Format == 1: 480 Coverage = lambda r: r.Coverage 481 ChainCoverage = lambda r: r.Coverage 482 ContextData = lambda r:(None,) 483 ChainContextData = lambda r:(None, None, None) 484 RuleData = lambda r:(r.Input,) 485 ChainRuleData = lambda r:(r.Backtrack, r.Input, r.LookAhead) 486 SetRuleData = None 487 ChainSetRuleData = None 488 elif Format == 2: 489 Coverage = lambda r: r.Coverage 490 ChainCoverage = lambda r: r.Coverage 491 ContextData = lambda r:(r.ClassDef,) 492 ChainContextData = lambda r:(r.LookAheadClassDef, 493 r.InputClassDef, 494 r.BacktrackClassDef) 495 RuleData = lambda r:(r.Class,) 496 ChainRuleData = lambda r:(r.LookAhead, r.Input, r.Backtrack) 497 def SetRuleData(r, d):(r.Class,) = d 498 def ChainSetRuleData(r, d):(r.LookAhead, r.Input, r.Backtrack) = d 499 elif Format == 3: 500 Coverage = lambda r: r.Coverage[0] 501 ChainCoverage = lambda r: r.InputCoverage[0] 502 ContextData = None 503 ChainContextData = None 504 RuleData = lambda r: r.Coverage 505 ChainRuleData = lambda r:(r.LookAheadCoverage + 506 r.InputCoverage + 507 r.BacktrackCoverage) 508 SetRuleData = None 509 ChainSetRuleData = None 510 else: 511 assert 0, "unknown format: %s" % Format 512 513 if Chain: 514 self.Coverage = ChainCoverage 515 self.ContextData = ChainContextData 516 self.RuleData = ChainRuleData 517 self.SetRuleData = ChainSetRuleData 518 else: 519 self.Coverage = Coverage 520 self.ContextData = ContextData 521 self.RuleData = RuleData 522 self.SetRuleData = SetRuleData 523 524 if Format == 1: 525 self.Rule = ChainTyp+'Rule' 526 self.RuleCount = ChainTyp+'RuleCount' 527 self.RuleSet = ChainTyp+'RuleSet' 528 self.RuleSetCount = ChainTyp+'RuleSetCount' 529 self.Intersect = lambda glyphs, c, r: [r] if r in glyphs else [] 530 elif Format == 2: 531 self.Rule = ChainTyp+'ClassRule' 532 self.RuleCount = ChainTyp+'ClassRuleCount' 533 self.RuleSet = ChainTyp+'ClassSet' 534 self.RuleSetCount = ChainTyp+'ClassSetCount' 535 self.Intersect = lambda glyphs, c, r: c.intersect_class(glyphs, r) 536 537 self.ClassDef = 'InputClassDef' if Chain else 'ClassDef' 538 self.ClassDefIndex = 1 if Chain else 0 539 self.Input = 'Input' if Chain else 'Class' 540 541 if self.Format not in [1, 2, 3]: 542 return None # Don't shoot the messenger; let it go 543 if not hasattr(self.__class__, "__ContextHelpers"): 544 self.__class__.__ContextHelpers = {} 545 if self.Format not in self.__class__.__ContextHelpers: 546 helper = ContextHelper(self.__class__, self.Format) 547 self.__class__.__ContextHelpers[self.Format] = helper 548 return self.__class__.__ContextHelpers[self.Format] 549 550@_add_method(otTables.ContextSubst, 551 otTables.ChainContextSubst) 552def closure_glyphs(self, s, cur_glyphs=None): 553 if cur_glyphs is None: cur_glyphs = s.glyphs 554 c = self.__classify_context() 555 556 indices = c.Coverage(self).intersect(s.glyphs) 557 if not indices: 558 return [] 559 cur_glyphs = c.Coverage(self).intersect_glyphs(s.glyphs); 560 561 if self.Format == 1: 562 ContextData = c.ContextData(self) 563 rss = getattr(self, c.RuleSet) 564 rssCount = getattr(self, c.RuleSetCount) 565 for i in indices: 566 if i >= rssCount or not rss[i]: continue 567 for r in getattr(rss[i], c.Rule): 568 if not r: continue 569 if all(all(c.Intersect(s.glyphs, cd, k) for k in klist) 570 for cd,klist in zip(ContextData, c.RuleData(r))): 571 chaos = False 572 for ll in getattr(r, c.LookupRecord): 573 if not ll: continue 574 seqi = ll.SequenceIndex 575 if chaos: 576 pos_glyphs = s.glyphs 577 else: 578 if seqi == 0: 579 pos_glyphs = set([c.Coverage(self).glyphs[i]]) 580 else: 581 pos_glyphs = set([r.Input[seqi - 1]]) 582 lookup = s.table.LookupList.Lookup[ll.LookupListIndex] 583 chaos = chaos or lookup.may_have_non_1to1() 584 lookup.closure_glyphs(s, cur_glyphs=pos_glyphs) 585 elif self.Format == 2: 586 ClassDef = getattr(self, c.ClassDef) 587 indices = ClassDef.intersect(cur_glyphs) 588 ContextData = c.ContextData(self) 589 rss = getattr(self, c.RuleSet) 590 rssCount = getattr(self, c.RuleSetCount) 591 for i in indices: 592 if i >= rssCount or not rss[i]: continue 593 for r in getattr(rss[i], c.Rule): 594 if not r: continue 595 if all(all(c.Intersect(s.glyphs, cd, k) for k in klist) 596 for cd,klist in zip(ContextData, c.RuleData(r))): 597 chaos = False 598 for ll in getattr(r, c.LookupRecord): 599 if not ll: continue 600 seqi = ll.SequenceIndex 601 if chaos: 602 pos_glyphs = s.glyphs 603 else: 604 if seqi == 0: 605 pos_glyphs = ClassDef.intersect_class(cur_glyphs, i) 606 else: 607 pos_glyphs = ClassDef.intersect_class(s.glyphs, 608 getattr(r, c.Input)[seqi - 1]) 609 lookup = s.table.LookupList.Lookup[ll.LookupListIndex] 610 chaos = chaos or lookup.may_have_non_1to1() 611 lookup.closure_glyphs(s, cur_glyphs=pos_glyphs) 612 elif self.Format == 3: 613 if not all(x.intersect(s.glyphs) for x in c.RuleData(self)): 614 return [] 615 r = self 616 chaos = False 617 for ll in getattr(r, c.LookupRecord): 618 if not ll: continue 619 seqi = ll.SequenceIndex 620 if chaos: 621 pos_glyphs = s.glyphs 622 else: 623 if seqi == 0: 624 pos_glyphs = cur_glyphs 625 else: 626 pos_glyphs = r.InputCoverage[seqi].intersect_glyphs(s.glyphs) 627 lookup = s.table.LookupList.Lookup[ll.LookupListIndex] 628 chaos = chaos or lookup.may_have_non_1to1() 629 lookup.closure_glyphs(s, cur_glyphs=pos_glyphs) 630 else: 631 assert 0, "unknown format: %s" % self.Format 632 633@_add_method(otTables.ContextSubst, 634 otTables.ContextPos, 635 otTables.ChainContextSubst, 636 otTables.ChainContextPos) 637def subset_glyphs(self, s): 638 c = self.__classify_context() 639 640 if self.Format == 1: 641 indices = self.Coverage.subset(s.glyphs) 642 rss = getattr(self, c.RuleSet) 643 rss = [rss[i] for i in indices] 644 for rs in rss: 645 if not rs: continue 646 ss = getattr(rs, c.Rule) 647 ss = [r for r in ss 648 if r and all(all(g in s.glyphs for g in glist) 649 for glist in c.RuleData(r))] 650 setattr(rs, c.Rule, ss) 651 setattr(rs, c.RuleCount, len(ss)) 652 # Prune empty subrulesets 653 rss = [rs for rs in rss if rs and getattr(rs, c.Rule)] 654 setattr(self, c.RuleSet, rss) 655 setattr(self, c.RuleSetCount, len(rss)) 656 return bool(rss) 657 elif self.Format == 2: 658 if not self.Coverage.subset(s.glyphs): 659 return False 660 ContextData = c.ContextData(self) 661 klass_maps = [x.subset(s.glyphs, remap=True) for x in ContextData] 662 663 # Keep rulesets for class numbers that survived. 664 indices = klass_maps[c.ClassDefIndex] 665 rss = getattr(self, c.RuleSet) 666 rssCount = getattr(self, c.RuleSetCount) 667 rss = [rss[i] for i in indices if i < rssCount] 668 del rssCount 669 # Delete, but not renumber, unreachable rulesets. 670 indices = getattr(self, c.ClassDef).intersect(self.Coverage.glyphs) 671 rss = [rss if i in indices else None for i,rss in enumerate(rss)] 672 while rss and rss[-1] is None: 673 del rss[-1] 674 675 for rs in rss: 676 if not rs: continue 677 ss = getattr(rs, c.Rule) 678 ss = [r for r in ss 679 if r and all(all(k in klass_map for k in klist) 680 for klass_map,klist in zip(klass_maps, c.RuleData(r)))] 681 setattr(rs, c.Rule, ss) 682 setattr(rs, c.RuleCount, len(ss)) 683 684 # Remap rule classes 685 for r in ss: 686 c.SetRuleData(r, [[klass_map.index(k) for k in klist] 687 for klass_map,klist in zip(klass_maps, c.RuleData(r))]) 688 return bool(rss) 689 elif self.Format == 3: 690 return all(x.subset(s.glyphs) for x in c.RuleData(self)) 691 else: 692 assert 0, "unknown format: %s" % self.Format 693 694@_add_method(otTables.ContextSubst, 695 otTables.ChainContextSubst, 696 otTables.ContextPos, 697 otTables.ChainContextPos) 698def subset_lookups(self, lookup_indices): 699 c = self.__classify_context() 700 701 if self.Format in [1, 2]: 702 for rs in getattr(self, c.RuleSet): 703 if not rs: continue 704 for r in getattr(rs, c.Rule): 705 if not r: continue 706 setattr(r, c.LookupRecord, 707 [ll for ll in getattr(r, c.LookupRecord) 708 if ll and ll.LookupListIndex in lookup_indices]) 709 for ll in getattr(r, c.LookupRecord): 710 if not ll: continue 711 ll.LookupListIndex = lookup_indices.index(ll.LookupListIndex) 712 elif self.Format == 3: 713 setattr(self, c.LookupRecord, 714 [ll for ll in getattr(self, c.LookupRecord) 715 if ll and ll.LookupListIndex in lookup_indices]) 716 for ll in getattr(self, c.LookupRecord): 717 if not ll: continue 718 ll.LookupListIndex = lookup_indices.index(ll.LookupListIndex) 719 else: 720 assert 0, "unknown format: %s" % self.Format 721 722@_add_method(otTables.ContextSubst, 723 otTables.ChainContextSubst, 724 otTables.ContextPos, 725 otTables.ChainContextPos) 726def collect_lookups(self): 727 c = self.__classify_context() 728 729 if self.Format in [1, 2]: 730 return [ll.LookupListIndex 731 for rs in getattr(self, c.RuleSet) if rs 732 for r in getattr(rs, c.Rule) if r 733 for ll in getattr(r, c.LookupRecord) if ll] 734 elif self.Format == 3: 735 return [ll.LookupListIndex 736 for ll in getattr(self, c.LookupRecord) if ll] 737 else: 738 assert 0, "unknown format: %s" % self.Format 739 740@_add_method(otTables.ExtensionSubst) 741def closure_glyphs(self, s, cur_glyphs=None): 742 if self.Format == 1: 743 self.ExtSubTable.closure_glyphs(s, cur_glyphs) 744 else: 745 assert 0, "unknown format: %s" % self.Format 746 747@_add_method(otTables.ExtensionSubst) 748def may_have_non_1to1(self): 749 if self.Format == 1: 750 return self.ExtSubTable.may_have_non_1to1() 751 else: 752 assert 0, "unknown format: %s" % self.Format 753 754@_add_method(otTables.ExtensionSubst, 755 otTables.ExtensionPos) 756def prune_pre_subset(self, options): 757 if self.Format == 1: 758 return self.ExtSubTable.prune_pre_subset(options) 759 else: 760 assert 0, "unknown format: %s" % self.Format 761 762@_add_method(otTables.ExtensionSubst, 763 otTables.ExtensionPos) 764def subset_glyphs(self, s): 765 if self.Format == 1: 766 return self.ExtSubTable.subset_glyphs(s) 767 else: 768 assert 0, "unknown format: %s" % self.Format 769 770@_add_method(otTables.ExtensionSubst, 771 otTables.ExtensionPos) 772def prune_post_subset(self, options): 773 if self.Format == 1: 774 return self.ExtSubTable.prune_post_subset(options) 775 else: 776 assert 0, "unknown format: %s" % self.Format 777 778@_add_method(otTables.ExtensionSubst, 779 otTables.ExtensionPos) 780def subset_lookups(self, lookup_indices): 781 if self.Format == 1: 782 return self.ExtSubTable.subset_lookups(lookup_indices) 783 else: 784 assert 0, "unknown format: %s" % self.Format 785 786@_add_method(otTables.ExtensionSubst, 787 otTables.ExtensionPos) 788def collect_lookups(self): 789 if self.Format == 1: 790 return self.ExtSubTable.collect_lookups() 791 else: 792 assert 0, "unknown format: %s" % self.Format 793 794@_add_method(otTables.Lookup) 795def closure_glyphs(self, s, cur_glyphs=None): 796 for st in self.SubTable: 797 if not st: continue 798 st.closure_glyphs(s, cur_glyphs) 799 800@_add_method(otTables.Lookup) 801def prune_pre_subset(self, options): 802 ret = False 803 for st in self.SubTable: 804 if not st: continue 805 if st.prune_pre_subset(options): ret = True 806 return ret 807 808@_add_method(otTables.Lookup) 809def subset_glyphs(self, s): 810 self.SubTable = [st for st in self.SubTable if st and st.subset_glyphs(s)] 811 self.SubTableCount = len(self.SubTable) 812 return bool(self.SubTableCount) 813 814@_add_method(otTables.Lookup) 815def prune_post_subset(self, options): 816 ret = False 817 for st in self.SubTable: 818 if not st: continue 819 if st.prune_post_subset(options): ret = True 820 return ret 821 822@_add_method(otTables.Lookup) 823def subset_lookups(self, lookup_indices): 824 for s in self.SubTable: 825 s.subset_lookups(lookup_indices) 826 827@_add_method(otTables.Lookup) 828def collect_lookups(self): 829 return _uniq_sort(sum((st.collect_lookups() for st in self.SubTable 830 if st), [])) 831 832@_add_method(otTables.Lookup) 833def may_have_non_1to1(self): 834 return any(st.may_have_non_1to1() for st in self.SubTable if st) 835 836@_add_method(otTables.LookupList) 837def prune_pre_subset(self, options): 838 ret = False 839 for l in self.Lookup: 840 if not l: continue 841 if l.prune_pre_subset(options): ret = True 842 return ret 843 844@_add_method(otTables.LookupList) 845def subset_glyphs(self, s): 846 "Returns the indices of nonempty lookups." 847 return [i for i,l in enumerate(self.Lookup) if l and l.subset_glyphs(s)] 848 849@_add_method(otTables.LookupList) 850def prune_post_subset(self, options): 851 ret = False 852 for l in self.Lookup: 853 if not l: continue 854 if l.prune_post_subset(options): ret = True 855 return ret 856 857@_add_method(otTables.LookupList) 858def subset_lookups(self, lookup_indices): 859 self.ensureDecompiled() 860 self.Lookup = [self.Lookup[i] for i in lookup_indices 861 if i < self.LookupCount] 862 self.LookupCount = len(self.Lookup) 863 for l in self.Lookup: 864 l.subset_lookups(lookup_indices) 865 866@_add_method(otTables.LookupList) 867def closure_lookups(self, lookup_indices): 868 lookup_indices = _uniq_sort(lookup_indices) 869 recurse = lookup_indices 870 while True: 871 recurse_lookups = sum((self.Lookup[i].collect_lookups() 872 for i in recurse if i < self.LookupCount), []) 873 recurse_lookups = [l for l in recurse_lookups 874 if l not in lookup_indices and l < self.LookupCount] 875 if not recurse_lookups: 876 return _uniq_sort(lookup_indices) 877 recurse_lookups = _uniq_sort(recurse_lookups) 878 lookup_indices.extend(recurse_lookups) 879 recurse = recurse_lookups 880 881@_add_method(otTables.Feature) 882def subset_lookups(self, lookup_indices): 883 self.LookupListIndex = [l for l in self.LookupListIndex 884 if l in lookup_indices] 885 # Now map them. 886 self.LookupListIndex = [lookup_indices.index(l) 887 for l in self.LookupListIndex] 888 self.LookupCount = len(self.LookupListIndex) 889 return self.LookupCount or self.FeatureParams 890 891@_add_method(otTables.Feature) 892def collect_lookups(self): 893 return self.LookupListIndex[:] 894 895@_add_method(otTables.FeatureList) 896def subset_lookups(self, lookup_indices): 897 "Returns the indices of nonempty features." 898 # Note: Never ever drop feature 'pref', even if it's empty. 899 # HarfBuzz chooses shaper for Khmer based on presence of this 900 # feature. See thread at: 901 # http://lists.freedesktop.org/archives/harfbuzz/2012-November/002660.html 902 feature_indices = [i for i,f in enumerate(self.FeatureRecord) 903 if (f.Feature.subset_lookups(lookup_indices) or 904 f.FeatureTag == 'pref')] 905 self.subset_features(feature_indices) 906 return feature_indices 907 908@_add_method(otTables.FeatureList) 909def collect_lookups(self, feature_indices): 910 return _uniq_sort(sum((self.FeatureRecord[i].Feature.collect_lookups() 911 for i in feature_indices 912 if i < self.FeatureCount), [])) 913 914@_add_method(otTables.FeatureList) 915def subset_features(self, feature_indices): 916 self.ensureDecompiled() 917 self.FeatureRecord = [self.FeatureRecord[i] for i in feature_indices] 918 self.FeatureCount = len(self.FeatureRecord) 919 return bool(self.FeatureCount) 920 921@_add_method(otTables.DefaultLangSys, 922 otTables.LangSys) 923def subset_features(self, feature_indices): 924 if self.ReqFeatureIndex in feature_indices: 925 self.ReqFeatureIndex = feature_indices.index(self.ReqFeatureIndex) 926 else: 927 self.ReqFeatureIndex = 65535 928 self.FeatureIndex = [f for f in self.FeatureIndex if f in feature_indices] 929 # Now map them. 930 self.FeatureIndex = [feature_indices.index(f) for f in self.FeatureIndex 931 if f in feature_indices] 932 self.FeatureCount = len(self.FeatureIndex) 933 return bool(self.FeatureCount or self.ReqFeatureIndex != 65535) 934 935@_add_method(otTables.DefaultLangSys, 936 otTables.LangSys) 937def collect_features(self): 938 feature_indices = self.FeatureIndex[:] 939 if self.ReqFeatureIndex != 65535: 940 feature_indices.append(self.ReqFeatureIndex) 941 return _uniq_sort(feature_indices) 942 943@_add_method(otTables.Script) 944def subset_features(self, feature_indices): 945 if(self.DefaultLangSys and 946 not self.DefaultLangSys.subset_features(feature_indices)): 947 self.DefaultLangSys = None 948 self.LangSysRecord = [l for l in self.LangSysRecord 949 if l.LangSys.subset_features(feature_indices)] 950 self.LangSysCount = len(self.LangSysRecord) 951 return bool(self.LangSysCount or self.DefaultLangSys) 952 953@_add_method(otTables.Script) 954def collect_features(self): 955 feature_indices = [l.LangSys.collect_features() for l in self.LangSysRecord] 956 if self.DefaultLangSys: 957 feature_indices.append(self.DefaultLangSys.collect_features()) 958 return _uniq_sort(sum(feature_indices, [])) 959 960@_add_method(otTables.ScriptList) 961def subset_features(self, feature_indices): 962 self.ScriptRecord = [s for s in self.ScriptRecord 963 if s.Script.subset_features(feature_indices)] 964 self.ScriptCount = len(self.ScriptRecord) 965 return bool(self.ScriptCount) 966 967@_add_method(otTables.ScriptList) 968def collect_features(self): 969 return _uniq_sort(sum((s.Script.collect_features() 970 for s in self.ScriptRecord), [])) 971 972@_add_method(ttLib.getTableClass('GSUB')) 973def closure_glyphs(self, s): 974 s.table = self.table 975 if self.table.ScriptList: 976 feature_indices = self.table.ScriptList.collect_features() 977 else: 978 feature_indices = [] 979 if self.table.FeatureList: 980 lookup_indices = self.table.FeatureList.collect_lookups(feature_indices) 981 else: 982 lookup_indices = [] 983 if self.table.LookupList: 984 while True: 985 orig_glyphs = s.glyphs.copy() 986 for i in lookup_indices: 987 if i >= self.table.LookupList.LookupCount: continue 988 if not self.table.LookupList.Lookup[i]: continue 989 self.table.LookupList.Lookup[i].closure_glyphs(s) 990 if orig_glyphs == s.glyphs: 991 break 992 del s.table 993 994@_add_method(ttLib.getTableClass('GSUB'), 995 ttLib.getTableClass('GPOS')) 996def subset_glyphs(self, s): 997 s.glyphs = s.glyphs_gsubed 998 if self.table.LookupList: 999 lookup_indices = self.table.LookupList.subset_glyphs(s) 1000 else: 1001 lookup_indices = [] 1002 self.subset_lookups(lookup_indices) 1003 self.prune_lookups() 1004 return True 1005 1006@_add_method(ttLib.getTableClass('GSUB'), 1007 ttLib.getTableClass('GPOS')) 1008def subset_lookups(self, lookup_indices): 1009 """Retains specified lookups, then removes empty features, language 1010 systems, and scripts.""" 1011 if self.table.LookupList: 1012 self.table.LookupList.subset_lookups(lookup_indices) 1013 if self.table.FeatureList: 1014 feature_indices = self.table.FeatureList.subset_lookups(lookup_indices) 1015 else: 1016 feature_indices = [] 1017 if self.table.ScriptList: 1018 self.table.ScriptList.subset_features(feature_indices) 1019 1020@_add_method(ttLib.getTableClass('GSUB'), 1021 ttLib.getTableClass('GPOS')) 1022def prune_lookups(self): 1023 "Remove unreferenced lookups" 1024 if self.table.ScriptList: 1025 feature_indices = self.table.ScriptList.collect_features() 1026 else: 1027 feature_indices = [] 1028 if self.table.FeatureList: 1029 lookup_indices = self.table.FeatureList.collect_lookups(feature_indices) 1030 else: 1031 lookup_indices = [] 1032 if self.table.LookupList: 1033 lookup_indices = self.table.LookupList.closure_lookups(lookup_indices) 1034 else: 1035 lookup_indices = [] 1036 self.subset_lookups(lookup_indices) 1037 1038@_add_method(ttLib.getTableClass('GSUB'), 1039 ttLib.getTableClass('GPOS')) 1040def subset_feature_tags(self, feature_tags): 1041 if self.table.FeatureList: 1042 feature_indices = [i for i,f in 1043 enumerate(self.table.FeatureList.FeatureRecord) 1044 if f.FeatureTag in feature_tags] 1045 self.table.FeatureList.subset_features(feature_indices) 1046 else: 1047 feature_indices = [] 1048 if self.table.ScriptList: 1049 self.table.ScriptList.subset_features(feature_indices) 1050 1051@_add_method(ttLib.getTableClass('GSUB'), 1052 ttLib.getTableClass('GPOS')) 1053def prune_features(self): 1054 "Remove unreferenced featurs" 1055 if self.table.ScriptList: 1056 feature_indices = self.table.ScriptList.collect_features() 1057 else: 1058 feature_indices = [] 1059 if self.table.FeatureList: 1060 self.table.FeatureList.subset_features(feature_indices) 1061 if self.table.ScriptList: 1062 self.table.ScriptList.subset_features(feature_indices) 1063 1064@_add_method(ttLib.getTableClass('GSUB'), 1065 ttLib.getTableClass('GPOS')) 1066def prune_pre_subset(self, options): 1067 # Drop undesired features 1068 if '*' not in options.layout_features: 1069 self.subset_feature_tags(options.layout_features) 1070 # Drop unreferenced lookups 1071 self.prune_lookups() 1072 # Prune lookups themselves 1073 if self.table.LookupList: 1074 self.table.LookupList.prune_pre_subset(options); 1075 return True 1076 1077@_add_method(ttLib.getTableClass('GSUB'), 1078 ttLib.getTableClass('GPOS')) 1079def remove_redundant_langsys(self): 1080 table = self.table 1081 if not table.ScriptList or not table.FeatureList: 1082 return 1083 1084 features = table.FeatureList.FeatureRecord 1085 1086 for s in table.ScriptList.ScriptRecord: 1087 d = s.Script.DefaultLangSys 1088 if not d: 1089 continue 1090 for lr in s.Script.LangSysRecord[:]: 1091 l = lr.LangSys 1092 # Compare d and l 1093 if len(d.FeatureIndex) != len(l.FeatureIndex): 1094 continue 1095 if (d.ReqFeatureIndex == 65535) != (l.ReqFeatureIndex == 65535): 1096 continue 1097 1098 if d.ReqFeatureIndex != 65535: 1099 if features[d.ReqFeatureIndex] != features[l.ReqFeatureIndex]: 1100 continue 1101 1102 for i in range(len(d.FeatureIndex)): 1103 if features[d.FeatureIndex[i]] != features[l.FeatureIndex[i]]: 1104 break 1105 else: 1106 # LangSys and default are equal; delete LangSys 1107 s.Script.LangSysRecord.remove(lr) 1108 1109@_add_method(ttLib.getTableClass('GSUB'), 1110 ttLib.getTableClass('GPOS')) 1111def prune_post_subset(self, options): 1112 table = self.table 1113 1114 # LookupList looks good. Just prune lookups themselves 1115 if table.LookupList: 1116 table.LookupList.prune_post_subset(options); 1117 # XXX Next two lines disabled because OTS is stupid and 1118 # doesn't like NULL offsetse here. 1119 #if not table.LookupList.Lookup: 1120 # table.LookupList = None 1121 1122 if not table.LookupList: 1123 table.FeatureList = None 1124 1125 if table.FeatureList: 1126 self.remove_redundant_langsys() 1127 # Remove unreferenced features 1128 self.prune_features() 1129 1130 # XXX Next two lines disabled because OTS is stupid and 1131 # doesn't like NULL offsetse here. 1132 #if table.FeatureList and not table.FeatureList.FeatureRecord: 1133 # table.FeatureList = None 1134 1135 # Never drop scripts themselves as them just being available 1136 # holds semantic significance. 1137 # XXX Next two lines disabled because OTS is stupid and 1138 # doesn't like NULL offsetse here. 1139 #if table.ScriptList and not table.ScriptList.ScriptRecord: 1140 # table.ScriptList = None 1141 1142 return True 1143 1144@_add_method(ttLib.getTableClass('GDEF')) 1145def subset_glyphs(self, s): 1146 glyphs = s.glyphs_gsubed 1147 table = self.table 1148 if table.LigCaretList: 1149 indices = table.LigCaretList.Coverage.subset(glyphs) 1150 table.LigCaretList.LigGlyph = [table.LigCaretList.LigGlyph[i] 1151 for i in indices] 1152 table.LigCaretList.LigGlyphCount = len(table.LigCaretList.LigGlyph) 1153 if table.MarkAttachClassDef: 1154 table.MarkAttachClassDef.classDefs = dict((g,v) for g,v in 1155 table.MarkAttachClassDef. 1156 classDefs.items() 1157 if g in glyphs) 1158 if table.GlyphClassDef: 1159 table.GlyphClassDef.classDefs = dict((g,v) for g,v in 1160 table.GlyphClassDef. 1161 classDefs.items() 1162 if g in glyphs) 1163 if table.AttachList: 1164 indices = table.AttachList.Coverage.subset(glyphs) 1165 GlyphCount = table.AttachList.GlyphCount 1166 table.AttachList.AttachPoint = [table.AttachList.AttachPoint[i] 1167 for i in indices 1168 if i < GlyphCount] 1169 table.AttachList.GlyphCount = len(table.AttachList.AttachPoint) 1170 if hasattr(table, "MarkGlyphSetsDef") and table.MarkGlyphSetsDef: 1171 for coverage in table.MarkGlyphSetsDef.Coverage: 1172 coverage.subset(glyphs) 1173 # TODO: The following is disabled. If enabling, we need to go fixup all 1174 # lookups that use MarkFilteringSet and map their set. 1175 #indices = table.MarkGlyphSetsDef.Coverage = [c for c in table.MarkGlyphSetsDef.Coverage if c.glyphs] 1176 return True 1177 1178@_add_method(ttLib.getTableClass('GDEF')) 1179def prune_post_subset(self, options): 1180 table = self.table 1181 # XXX check these against OTS 1182 if table.LigCaretList and not table.LigCaretList.LigGlyphCount: 1183 table.LigCaretList = None 1184 if table.MarkAttachClassDef and not table.MarkAttachClassDef.classDefs: 1185 table.MarkAttachClassDef = None 1186 if table.GlyphClassDef and not table.GlyphClassDef.classDefs: 1187 table.GlyphClassDef = None 1188 if table.AttachList and not table.AttachList.GlyphCount: 1189 table.AttachList = None 1190 if hasattr(table, "MarkGlyphSetsDef") and table.MarkGlyphSetsDef and not table.MarkGlyphSetsDef.Coverage: 1191 table.MarkGlyphSetsDef = None 1192 if table.Version == 0x00010002/0x10000: 1193 table.Version = 1.0 1194 return bool(table.LigCaretList or 1195 table.MarkAttachClassDef or 1196 table.GlyphClassDef or 1197 table.AttachList or 1198 (table.Version >= 0x00010002/0x10000 and table.MarkGlyphSetsDef)) 1199 1200@_add_method(ttLib.getTableClass('kern')) 1201def prune_pre_subset(self, options): 1202 # Prune unknown kern table types 1203 self.kernTables = [t for t in self.kernTables if hasattr(t, 'kernTable')] 1204 return bool(self.kernTables) 1205 1206@_add_method(ttLib.getTableClass('kern')) 1207def subset_glyphs(self, s): 1208 glyphs = s.glyphs_gsubed 1209 for t in self.kernTables: 1210 t.kernTable = dict(((a,b),v) for (a,b),v in t.kernTable.items() 1211 if a in glyphs and b in glyphs) 1212 self.kernTables = [t for t in self.kernTables if t.kernTable] 1213 return bool(self.kernTables) 1214 1215@_add_method(ttLib.getTableClass('vmtx')) 1216def subset_glyphs(self, s): 1217 self.metrics = dict((g,v) for g,v in self.metrics.items() if g in s.glyphs) 1218 return bool(self.metrics) 1219 1220@_add_method(ttLib.getTableClass('hmtx')) 1221def subset_glyphs(self, s): 1222 self.metrics = dict((g,v) for g,v in self.metrics.items() if g in s.glyphs) 1223 return True # Required table 1224 1225@_add_method(ttLib.getTableClass('hdmx')) 1226def subset_glyphs(self, s): 1227 self.hdmx = dict((sz,dict((g,v) for g,v in l.items() if g in s.glyphs)) 1228 for sz,l in self.hdmx.items()) 1229 return bool(self.hdmx) 1230 1231@_add_method(ttLib.getTableClass('VORG')) 1232def subset_glyphs(self, s): 1233 self.VOriginRecords = dict((g,v) for g,v in self.VOriginRecords.items() 1234 if g in s.glyphs) 1235 self.numVertOriginYMetrics = len(self.VOriginRecords) 1236 return True # Never drop; has default metrics 1237 1238@_add_method(ttLib.getTableClass('post')) 1239def prune_pre_subset(self, options): 1240 if not options.glyph_names: 1241 self.formatType = 3.0 1242 return True # Required table 1243 1244@_add_method(ttLib.getTableClass('post')) 1245def subset_glyphs(self, s): 1246 self.extraNames = [] # This seems to do it 1247 return True # Required table 1248 1249@_add_method(ttLib.getTableModule('glyf').Glyph) 1250def remapComponentsFast(self, indices): 1251 if not self.data or struct.unpack(">h", self.data[:2])[0] >= 0: 1252 return # Not composite 1253 data = array.array("B", self.data) 1254 i = 10 1255 more = 1 1256 while more: 1257 flags =(data[i] << 8) | data[i+1] 1258 glyphID =(data[i+2] << 8) | data[i+3] 1259 # Remap 1260 glyphID = indices.index(glyphID) 1261 data[i+2] = glyphID >> 8 1262 data[i+3] = glyphID & 0xFF 1263 i += 4 1264 flags = int(flags) 1265 1266 if flags & 0x0001: i += 4 # ARG_1_AND_2_ARE_WORDS 1267 else: i += 2 1268 if flags & 0x0008: i += 2 # WE_HAVE_A_SCALE 1269 elif flags & 0x0040: i += 4 # WE_HAVE_AN_X_AND_Y_SCALE 1270 elif flags & 0x0080: i += 8 # WE_HAVE_A_TWO_BY_TWO 1271 more = flags & 0x0020 # MORE_COMPONENTS 1272 1273 self.data = data.tostring() 1274 1275@_add_method(ttLib.getTableClass('glyf')) 1276def closure_glyphs(self, s): 1277 decompose = s.glyphs 1278 while True: 1279 components = set() 1280 for g in decompose: 1281 if g not in self.glyphs: 1282 continue 1283 gl = self.glyphs[g] 1284 for c in gl.getComponentNames(self): 1285 if c not in s.glyphs: 1286 components.add(c) 1287 components = set(c for c in components if c not in s.glyphs) 1288 if not components: 1289 break 1290 decompose = components 1291 s.glyphs.update(components) 1292 1293@_add_method(ttLib.getTableClass('glyf')) 1294def prune_pre_subset(self, options): 1295 if options.notdef_glyph and not options.notdef_outline: 1296 g = self[self.glyphOrder[0]] 1297 # Yay, easy! 1298 g.__dict__.clear() 1299 g.data = "" 1300 return True 1301 1302@_add_method(ttLib.getTableClass('glyf')) 1303def subset_glyphs(self, s): 1304 self.glyphs = dict((g,v) for g,v in self.glyphs.items() if g in s.glyphs) 1305 indices = [i for i,g in enumerate(self.glyphOrder) if g in s.glyphs] 1306 for v in self.glyphs.values(): 1307 if hasattr(v, "data"): 1308 v.remapComponentsFast(indices) 1309 else: 1310 pass # No need 1311 self.glyphOrder = [g for g in self.glyphOrder if g in s.glyphs] 1312 # Don't drop empty 'glyf' tables, otherwise 'loca' doesn't get subset. 1313 return True 1314 1315@_add_method(ttLib.getTableClass('glyf')) 1316def prune_post_subset(self, options): 1317 if not options.hinting: 1318 for v in self.glyphs.values(): 1319 v.removeHinting() 1320 return True 1321 1322@_add_method(ttLib.getTableClass('CFF ')) 1323def prune_pre_subset(self, options): 1324 cff = self.cff 1325 # CFF table must have one font only 1326 cff.fontNames = cff.fontNames[:1] 1327 1328 if options.notdef_glyph and not options.notdef_outline: 1329 for fontname in cff.keys(): 1330 font = cff[fontname] 1331 c,_ = font.CharStrings.getItemAndSelector('.notdef') 1332 # XXX we should preserve the glyph width 1333 c.bytecode = '\x0e' # endchar 1334 c.program = None 1335 1336 return True # bool(cff.fontNames) 1337 1338@_add_method(ttLib.getTableClass('CFF ')) 1339def subset_glyphs(self, s): 1340 cff = self.cff 1341 for fontname in cff.keys(): 1342 font = cff[fontname] 1343 cs = font.CharStrings 1344 1345 # Load all glyphs 1346 for g in font.charset: 1347 if g not in s.glyphs: continue 1348 c,sel = cs.getItemAndSelector(g) 1349 1350 if cs.charStringsAreIndexed: 1351 indices = [i for i,g in enumerate(font.charset) if g in s.glyphs] 1352 csi = cs.charStringsIndex 1353 csi.items = [csi.items[i] for i in indices] 1354 csi.count = len(csi.items) 1355 del csi.file, csi.offsets 1356 if hasattr(font, "FDSelect"): 1357 sel = font.FDSelect 1358 sel.format = None 1359 sel.gidArray = [sel.gidArray[i] for i in indices] 1360 cs.charStrings = dict((g,indices.index(v)) 1361 for g,v in cs.charStrings.items() 1362 if g in s.glyphs) 1363 else: 1364 cs.charStrings = dict((g,v) 1365 for g,v in cs.charStrings.items() 1366 if g in s.glyphs) 1367 font.charset = [g for g in font.charset if g in s.glyphs] 1368 font.numGlyphs = len(font.charset) 1369 1370 return True # any(cff[fontname].numGlyphs for fontname in cff.keys()) 1371 1372@_add_method(psCharStrings.T2CharString) 1373def subset_subroutines(self, subrs, gsubrs): 1374 p = self.program 1375 assert len(p) 1376 for i in range(1, len(p)): 1377 if p[i] == 'callsubr': 1378 assert isinstance(p[i-1], int) 1379 p[i-1] = subrs._used.index(p[i-1] + subrs._old_bias) - subrs._new_bias 1380 elif p[i] == 'callgsubr': 1381 assert isinstance(p[i-1], int) 1382 p[i-1] = gsubrs._used.index(p[i-1] + gsubrs._old_bias) - gsubrs._new_bias 1383 1384@_add_method(psCharStrings.T2CharString) 1385def drop_hints(self): 1386 hints = self._hints 1387 1388 if hints.has_hint: 1389 self.program = self.program[hints.last_hint:] 1390 if hasattr(self, 'width'): 1391 # Insert width back if needed 1392 if self.width != self.private.defaultWidthX: 1393 self.program.insert(0, self.width - self.private.nominalWidthX) 1394 1395 if hints.has_hintmask: 1396 i = 0 1397 p = self.program 1398 while i < len(p): 1399 if p[i] in ['hintmask', 'cntrmask']: 1400 assert i + 1 <= len(p) 1401 del p[i:i+2] 1402 continue 1403 i += 1 1404 1405 # TODO: we currently don't drop calls to "empty" subroutines. 1406 1407 assert len(self.program) 1408 1409 del self._hints 1410 1411class _MarkingT2Decompiler(psCharStrings.SimpleT2Decompiler): 1412 1413 def __init__(self, localSubrs, globalSubrs): 1414 psCharStrings.SimpleT2Decompiler.__init__(self, 1415 localSubrs, 1416 globalSubrs) 1417 for subrs in [localSubrs, globalSubrs]: 1418 if subrs and not hasattr(subrs, "_used"): 1419 subrs._used = set() 1420 1421 def op_callsubr(self, index): 1422 self.localSubrs._used.add(self.operandStack[-1]+self.localBias) 1423 psCharStrings.SimpleT2Decompiler.op_callsubr(self, index) 1424 1425 def op_callgsubr(self, index): 1426 self.globalSubrs._used.add(self.operandStack[-1]+self.globalBias) 1427 psCharStrings.SimpleT2Decompiler.op_callgsubr(self, index) 1428 1429class _DehintingT2Decompiler(psCharStrings.SimpleT2Decompiler): 1430 1431 class Hints(object): 1432 def __init__(self): 1433 # Whether calling this charstring produces any hint stems 1434 self.has_hint = False 1435 # Index to start at to drop all hints 1436 self.last_hint = 0 1437 # Index up to which we know more hints are possible. Only 1438 # relevant if status is 0 or 1. 1439 self.last_checked = 0 1440 # The status means: 1441 # 0: after dropping hints, this charstring is empty 1442 # 1: after dropping hints, there may be more hints continuing after this 1443 # 2: no more hints possible after this charstring 1444 self.status = 0 1445 # Has hintmask instructions; not recursive 1446 self.has_hintmask = False 1447 pass 1448 1449 def __init__(self, css, localSubrs, globalSubrs): 1450 self._css = css 1451 psCharStrings.SimpleT2Decompiler.__init__(self, 1452 localSubrs, 1453 globalSubrs) 1454 1455 def execute(self, charString): 1456 old_hints = charString._hints if hasattr(charString, '_hints') else None 1457 charString._hints = self.Hints() 1458 1459 psCharStrings.SimpleT2Decompiler.execute(self, charString) 1460 1461 hints = charString._hints 1462 1463 if hints.has_hint or hints.has_hintmask: 1464 self._css.add(charString) 1465 1466 if hints.status != 2: 1467 # Check from last_check, make sure we didn't have any operators. 1468 for i in range(hints.last_checked, len(charString.program) - 1): 1469 if isinstance(charString.program[i], str): 1470 hints.status = 2 1471 break; 1472 else: 1473 hints.status = 1 # There's *something* here 1474 hints.last_checked = len(charString.program) 1475 1476 if old_hints: 1477 assert hints.__dict__ == old_hints.__dict__ 1478 1479 def op_callsubr(self, index): 1480 subr = self.localSubrs[self.operandStack[-1]+self.localBias] 1481 psCharStrings.SimpleT2Decompiler.op_callsubr(self, index) 1482 self.processSubr(index, subr) 1483 1484 def op_callgsubr(self, index): 1485 subr = self.globalSubrs[self.operandStack[-1]+self.globalBias] 1486 psCharStrings.SimpleT2Decompiler.op_callgsubr(self, index) 1487 self.processSubr(index, subr) 1488 1489 def op_hstem(self, index): 1490 psCharStrings.SimpleT2Decompiler.op_hstem(self, index) 1491 self.processHint(index) 1492 def op_vstem(self, index): 1493 psCharStrings.SimpleT2Decompiler.op_vstem(self, index) 1494 self.processHint(index) 1495 def op_hstemhm(self, index): 1496 psCharStrings.SimpleT2Decompiler.op_hstemhm(self, index) 1497 self.processHint(index) 1498 def op_vstemhm(self, index): 1499 psCharStrings.SimpleT2Decompiler.op_vstemhm(self, index) 1500 self.processHint(index) 1501 def op_hintmask(self, index): 1502 psCharStrings.SimpleT2Decompiler.op_hintmask(self, index) 1503 self.processHintmask(index) 1504 def op_cntrmask(self, index): 1505 psCharStrings.SimpleT2Decompiler.op_cntrmask(self, index) 1506 self.processHintmask(index) 1507 1508 def processHintmask(self, index): 1509 cs = self.callingStack[-1] 1510 hints = cs._hints 1511 hints.has_hintmask = True 1512 if hints.status != 2 and hints.has_hint: 1513 # Check from last_check, see if we may be an implicit vstem 1514 for i in range(hints.last_checked, index - 1): 1515 if isinstance(cs.program[i], str): 1516 hints.status = 2 1517 break; 1518 if hints.status != 2: 1519 # We are an implicit vstem 1520 hints.last_hint = index + 1 1521 hints.status = 0 1522 hints.last_checked = index + 1 1523 1524 def processHint(self, index): 1525 cs = self.callingStack[-1] 1526 hints = cs._hints 1527 hints.has_hint = True 1528 hints.last_hint = index 1529 hints.last_checked = index 1530 1531 def processSubr(self, index, subr): 1532 cs = self.callingStack[-1] 1533 hints = cs._hints 1534 subr_hints = subr._hints 1535 1536 if subr_hints.has_hint: 1537 if hints.status != 2: 1538 hints.has_hint = True 1539 hints.last_checked = index 1540 hints.status = subr_hints.status 1541 # Decide where to chop off from 1542 if subr_hints.status == 0: 1543 hints.last_hint = index 1544 else: 1545 hints.last_hint = index - 2 # Leave the subr call in 1546 else: 1547 # In my understanding, this is a font bug. Ie. it has hint stems 1548 # *after* path construction. I've seen this in widespread fonts. 1549 # Best to ignore the hints I suppose... 1550 pass 1551 #assert 0 1552 else: 1553 hints.status = max(hints.status, subr_hints.status) 1554 if hints.status != 2: 1555 # Check from last_check, make sure we didn't have 1556 # any operators. 1557 for i in range(hints.last_checked, index - 1): 1558 if isinstance(cs.program[i], str): 1559 hints.status = 2 1560 break; 1561 hints.last_checked = index 1562 if hints.status != 2: 1563 # Decide where to chop off from 1564 if subr_hints.status == 0: 1565 hints.last_hint = index 1566 else: 1567 hints.last_hint = index - 2 # Leave the subr call in 1568 1569@_add_method(ttLib.getTableClass('CFF ')) 1570def prune_post_subset(self, options): 1571 cff = self.cff 1572 for fontname in cff.keys(): 1573 font = cff[fontname] 1574 cs = font.CharStrings 1575 1576 1577 # 1578 # Drop unused FontDictionaries 1579 # 1580 if hasattr(font, "FDSelect"): 1581 sel = font.FDSelect 1582 indices = _uniq_sort(sel.gidArray) 1583 sel.gidArray = [indices.index (ss) for ss in sel.gidArray] 1584 arr = font.FDArray 1585 arr.items = [arr[i] for i in indices] 1586 arr.count = len(arr.items) 1587 del arr.file, arr.offsets 1588 1589 1590 # 1591 # Drop hints if not needed 1592 # 1593 if not options.hinting: 1594 1595 # 1596 # This can be tricky, but doesn't have to. What we do is: 1597 # 1598 # - Run all used glyph charstrings and recurse into subroutines, 1599 # - For each charstring (including subroutines), if it has any 1600 # of the hint stem operators, we mark it as such. Upon returning, 1601 # for each charstring we note all the subroutine calls it makes 1602 # that (recursively) contain a stem, 1603 # - Dropping hinting then consists of the following two ops: 1604 # * Drop the piece of the program in each charstring before the 1605 # last call to a stem op or a stem-calling subroutine, 1606 # * Drop all hintmask operations. 1607 # - It's trickier... A hintmask right after hints and a few numbers 1608 # will act as an implicit vstemhm. As such, we track whether 1609 # we have seen any non-hint operators so far and do the right 1610 # thing, recursively... Good luck understanding that :( 1611 # 1612 css = set() 1613 for g in font.charset: 1614 c,sel = cs.getItemAndSelector(g) 1615 # Make sure it's decompiled. We want our "decompiler" to walk 1616 # the program, not the bytecode. 1617 c.draw(basePen.NullPen()) 1618 subrs = getattr(c.private, "Subrs", []) 1619 decompiler = _DehintingT2Decompiler(css, subrs, c.globalSubrs) 1620 decompiler.execute(c) 1621 for charstring in css: 1622 charstring.drop_hints() 1623 1624 # Drop font-wide hinting values 1625 all_privs = [] 1626 if hasattr(font, 'FDSelect'): 1627 all_privs.extend(fd.Private for fd in font.FDArray) 1628 else: 1629 all_privs.append(font.Private) 1630 for priv in all_privs: 1631 for k in ['BlueValues', 'OtherBlues', 'FamilyBlues', 'FamilyOtherBlues', 1632 'BlueScale', 'BlueShift', 'BlueFuzz', 1633 'StemSnapH', 'StemSnapV', 'StdHW', 'StdVW']: 1634 if hasattr(priv, k): 1635 setattr(priv, k, None) 1636 1637 1638 # 1639 # Renumber subroutines to remove unused ones 1640 # 1641 1642 # Mark all used subroutines 1643 for g in font.charset: 1644 c,sel = cs.getItemAndSelector(g) 1645 subrs = getattr(c.private, "Subrs", []) 1646 decompiler = _MarkingT2Decompiler(subrs, c.globalSubrs) 1647 decompiler.execute(c) 1648 1649 all_subrs = [font.GlobalSubrs] 1650 if hasattr(font, 'FDSelect'): 1651 all_subrs.extend(fd.Private.Subrs for fd in font.FDArray if hasattr(fd.Private, 'Subrs') and fd.Private.Subrs) 1652 elif hasattr(font.Private, 'Subrs') and font.Private.Subrs: 1653 all_subrs.append(font.Private.Subrs) 1654 1655 subrs = set(subrs) # Remove duplicates 1656 1657 # Prepare 1658 for subrs in all_subrs: 1659 if not hasattr(subrs, '_used'): 1660 subrs._used = set() 1661 subrs._used = _uniq_sort(subrs._used) 1662 subrs._old_bias = psCharStrings.calcSubrBias(subrs) 1663 subrs._new_bias = psCharStrings.calcSubrBias(subrs._used) 1664 1665 # Renumber glyph charstrings 1666 for g in font.charset: 1667 c,sel = cs.getItemAndSelector(g) 1668 subrs = getattr(c.private, "Subrs", []) 1669 c.subset_subroutines (subrs, font.GlobalSubrs) 1670 1671 # Renumber subroutines themselves 1672 for subrs in all_subrs: 1673 1674 if subrs == font.GlobalSubrs: 1675 if not hasattr(font, 'FDSelect') and hasattr(font.Private, 'Subrs'): 1676 local_subrs = font.Private.Subrs 1677 else: 1678 local_subrs = [] 1679 else: 1680 local_subrs = subrs 1681 1682 subrs.items = [subrs.items[i] for i in subrs._used] 1683 subrs.count = len(subrs.items) 1684 del subrs.file 1685 if hasattr(subrs, 'offsets'): 1686 del subrs.offsets 1687 1688 for i in range (subrs.count): 1689 subrs[i].subset_subroutines (local_subrs, font.GlobalSubrs) 1690 1691 # Cleanup 1692 for subrs in all_subrs: 1693 del subrs._used, subrs._old_bias, subrs._new_bias 1694 1695 return True 1696 1697@_add_method(ttLib.getTableClass('cmap')) 1698def closure_glyphs(self, s): 1699 tables = [t for t in self.tables if t.isUnicode()] 1700 for u in s.unicodes_requested: 1701 found = False 1702 for table in tables: 1703 if u in table.cmap: 1704 s.glyphs.add(table.cmap[u]) 1705 found = True 1706 break 1707 if not found: 1708 s.log("No glyph for Unicode value %s; skipping." % u) 1709 1710@_add_method(ttLib.getTableClass('cmap')) 1711def prune_pre_subset(self, options): 1712 if not options.legacy_cmap: 1713 # Drop non-Unicode / non-Symbol cmaps 1714 self.tables = [t for t in self.tables if t.isUnicode() or t.isSymbol()] 1715 if not options.symbol_cmap: 1716 self.tables = [t for t in self.tables if not t.isSymbol()] 1717 # TODO(behdad) Only keep one subtable? 1718 # For now, drop format=0 which can't be subset_glyphs easily? 1719 self.tables = [t for t in self.tables if t.format != 0] 1720 self.numSubTables = len(self.tables) 1721 return True # Required table 1722 1723@_add_method(ttLib.getTableClass('cmap')) 1724def subset_glyphs(self, s): 1725 s.glyphs = s.glyphs_cmaped 1726 for t in self.tables: 1727 # For reasons I don't understand I need this here 1728 # to force decompilation of the cmap format 14. 1729 try: 1730 getattr(t, "asdf") 1731 except AttributeError: 1732 pass 1733 if t.format == 14: 1734 # TODO(behdad) XXX We drop all the default-UVS mappings(g==None). 1735 t.uvsDict = dict((v,[(u,g) for u,g in l if g in s.glyphs]) 1736 for v,l in t.uvsDict.items()) 1737 t.uvsDict = dict((v,l) for v,l in t.uvsDict.items() if l) 1738 else: 1739 t.cmap = dict((u,g) for u,g in t.cmap.items() 1740 if g in s.glyphs_requested or u in s.unicodes_requested) 1741 self.tables = [t for t in self.tables 1742 if (t.cmap if t.format != 14 else t.uvsDict)] 1743 self.numSubTables = len(self.tables) 1744 # TODO(behdad) Convert formats when needed. 1745 # In particular, if we have a format=12 without non-BMP 1746 # characters, either drop format=12 one or convert it 1747 # to format=4 if there's not one. 1748 return True # Required table 1749 1750@_add_method(ttLib.getTableClass('name')) 1751def prune_pre_subset(self, options): 1752 if '*' not in options.name_IDs: 1753 self.names = [n for n in self.names if n.nameID in options.name_IDs] 1754 if not options.name_legacy: 1755 self.names = [n for n in self.names 1756 if n.platformID == 3 and n.platEncID == 1] 1757 if '*' not in options.name_languages: 1758 self.names = [n for n in self.names if n.langID in options.name_languages] 1759 return True # Required table 1760 1761 1762# TODO(behdad) OS/2 ulUnicodeRange / ulCodePageRange? 1763# TODO(behdad) Drop AAT tables. 1764# TODO(behdad) Drop unneeded GSUB/GPOS Script/LangSys entries. 1765# TODO(behdad) Drop empty GSUB/GPOS, and GDEF if no GSUB/GPOS left 1766# TODO(behdad) Drop GDEF subitems if unused by lookups 1767# TODO(behdad) Avoid recursing too much (in GSUB/GPOS and in CFF) 1768# TODO(behdad) Text direction considerations. 1769# TODO(behdad) Text script / language considerations. 1770# TODO(behdad) Optionally drop 'kern' table if GPOS available 1771# TODO(behdad) Implement --unicode='*' to choose all cmap'ed 1772# TODO(behdad) Drop old-spec Indic scripts 1773 1774 1775class Options(object): 1776 1777 class UnknownOptionError(Exception): 1778 pass 1779 1780 _drop_tables_default = ['BASE', 'JSTF', 'DSIG', 'EBDT', 'EBLC', 'EBSC', 'SVG ', 1781 'PCLT', 'LTSH'] 1782 _drop_tables_default += ['Feat', 'Glat', 'Gloc', 'Silf', 'Sill'] # Graphite 1783 _drop_tables_default += ['CBLC', 'CBDT', 'sbix', 'COLR', 'CPAL'] # Color 1784 _no_subset_tables_default = ['gasp', 'head', 'hhea', 'maxp', 'vhea', 'OS/2', 1785 'loca', 'name', 'cvt ', 'fpgm', 'prep'] 1786 _hinting_tables_default = ['cvt ', 'fpgm', 'prep', 'hdmx', 'VDMX'] 1787 1788 # Based on HarfBuzz shapers 1789 _layout_features_groups = { 1790 # Default shaper 1791 'common': ['ccmp', 'liga', 'locl', 'mark', 'mkmk', 'rlig'], 1792 'horizontal': ['calt', 'clig', 'curs', 'kern', 'rclt'], 1793 'vertical': ['valt', 'vert', 'vkrn', 'vpal', 'vrt2'], 1794 'ltr': ['ltra', 'ltrm'], 1795 'rtl': ['rtla', 'rtlm'], 1796 # Complex shapers 1797 'arabic': ['init', 'medi', 'fina', 'isol', 'med2', 'fin2', 'fin3', 1798 'cswh', 'mset'], 1799 'hangul': ['ljmo', 'vjmo', 'tjmo'], 1800 'tibetan': ['abvs', 'blws', 'abvm', 'blwm'], 1801 'indic': ['nukt', 'akhn', 'rphf', 'rkrf', 'pref', 'blwf', 'half', 1802 'abvf', 'pstf', 'cfar', 'vatu', 'cjct', 'init', 'pres', 1803 'abvs', 'blws', 'psts', 'haln', 'dist', 'abvm', 'blwm'], 1804 } 1805 _layout_features_default = _uniq_sort(sum( 1806 iter(_layout_features_groups.values()), [])) 1807 1808 drop_tables = _drop_tables_default 1809 no_subset_tables = _no_subset_tables_default 1810 hinting_tables = _hinting_tables_default 1811 layout_features = _layout_features_default 1812 hinting = True 1813 glyph_names = False 1814 legacy_cmap = False 1815 symbol_cmap = False 1816 name_IDs = [1, 2] # Family and Style 1817 name_legacy = False 1818 name_languages = [0x0409] # English 1819 notdef_glyph = True # gid0 for TrueType / .notdef for CFF 1820 notdef_outline = False # No need for notdef to have an outline really 1821 recommended_glyphs = False # gid1, gid2, gid3 for TrueType 1822 recalc_bounds = False # Recalculate font bounding boxes 1823 canonical_order = False # Order tables as recommended 1824 flavor = None # May be 'woff' 1825 1826 def __init__(self, **kwargs): 1827 1828 self.set(**kwargs) 1829 1830 def set(self, **kwargs): 1831 for k,v in kwargs.items(): 1832 if not hasattr(self, k): 1833 raise self.UnknownOptionError("Unknown option '%s'" % k) 1834 setattr(self, k, v) 1835 1836 def parse_opts(self, argv, ignore_unknown=False): 1837 ret = [] 1838 opts = {} 1839 for a in argv: 1840 orig_a = a 1841 if not a.startswith('--'): 1842 ret.append(a) 1843 continue 1844 a = a[2:] 1845 i = a.find('=') 1846 op = '=' 1847 if i == -1: 1848 if a.startswith("no-"): 1849 k = a[3:] 1850 v = False 1851 else: 1852 k = a 1853 v = True 1854 else: 1855 k = a[:i] 1856 if k[-1] in "-+": 1857 op = k[-1]+'=' # Ops is '-=' or '+=' now. 1858 k = k[:-1] 1859 v = a[i+1:] 1860 k = k.replace('-', '_') 1861 if not hasattr(self, k): 1862 if ignore_unknown is True or k in ignore_unknown: 1863 ret.append(orig_a) 1864 continue 1865 else: 1866 raise self.UnknownOptionError("Unknown option '%s'" % a) 1867 1868 ov = getattr(self, k) 1869 if isinstance(ov, bool): 1870 v = bool(v) 1871 elif isinstance(ov, int): 1872 v = int(v) 1873 elif isinstance(ov, list): 1874 vv = v.split(',') 1875 if vv == ['']: 1876 vv = [] 1877 vv = [int(x, 0) if len(x) and x[0] in "0123456789" else x for x in vv] 1878 if op == '=': 1879 v = vv 1880 elif op == '+=': 1881 v = ov 1882 v.extend(vv) 1883 elif op == '-=': 1884 v = ov 1885 for x in vv: 1886 if x in v: 1887 v.remove(x) 1888 else: 1889 assert False 1890 1891 opts[k] = v 1892 self.set(**opts) 1893 1894 return ret 1895 1896 1897class Subsetter(object): 1898 1899 def __init__(self, options=None, log=None): 1900 1901 if not log: 1902 log = Logger() 1903 if not options: 1904 options = Options() 1905 1906 self.options = options 1907 self.log = log 1908 self.unicodes_requested = set() 1909 self.glyphs_requested = set() 1910 self.glyphs = set() 1911 1912 def populate(self, glyphs=[], unicodes=[], text=""): 1913 self.unicodes_requested.update(unicodes) 1914 if isinstance(text, bytes): 1915 text = text.decode("utf8") 1916 for u in text: 1917 self.unicodes_requested.add(ord(u)) 1918 self.glyphs_requested.update(glyphs) 1919 self.glyphs.update(glyphs) 1920 1921 def _prune_pre_subset(self, font): 1922 1923 for tag in font.keys(): 1924 if tag == 'GlyphOrder': continue 1925 1926 if(tag in self.options.drop_tables or 1927 (tag in self.options.hinting_tables and not self.options.hinting)): 1928 self.log(tag, "dropped") 1929 del font[tag] 1930 continue 1931 1932 clazz = ttLib.getTableClass(tag) 1933 1934 if hasattr(clazz, 'prune_pre_subset'): 1935 table = font[tag] 1936 self.log.lapse("load '%s'" % tag) 1937 retain = table.prune_pre_subset(self.options) 1938 self.log.lapse("prune '%s'" % tag) 1939 if not retain: 1940 self.log(tag, "pruned to empty; dropped") 1941 del font[tag] 1942 continue 1943 else: 1944 self.log(tag, "pruned") 1945 1946 def _closure_glyphs(self, font): 1947 1948 realGlyphs = set(font.getGlyphOrder()) 1949 1950 self.glyphs = self.glyphs_requested.copy() 1951 1952 if 'cmap' in font: 1953 font['cmap'].closure_glyphs(self) 1954 self.glyphs.intersection_update(realGlyphs) 1955 self.glyphs_cmaped = self.glyphs 1956 1957 if self.options.notdef_glyph: 1958 if 'glyf' in font: 1959 self.glyphs.add(font.getGlyphName(0)) 1960 self.log("Added gid0 to subset") 1961 else: 1962 self.glyphs.add('.notdef') 1963 self.log("Added .notdef to subset") 1964 if self.options.recommended_glyphs: 1965 if 'glyf' in font: 1966 for i in range(min(4, len(font.getGlyphOrder()))): 1967 self.glyphs.add(font.getGlyphName(i)) 1968 self.log("Added first four glyphs to subset") 1969 1970 if 'GSUB' in font: 1971 self.log("Closing glyph list over 'GSUB': %d glyphs before" % 1972 len(self.glyphs)) 1973 self.log.glyphs(self.glyphs, font=font) 1974 font['GSUB'].closure_glyphs(self) 1975 self.glyphs.intersection_update(realGlyphs) 1976 self.log("Closed glyph list over 'GSUB': %d glyphs after" % 1977 len(self.glyphs)) 1978 self.log.glyphs(self.glyphs, font=font) 1979 self.log.lapse("close glyph list over 'GSUB'") 1980 self.glyphs_gsubed = self.glyphs.copy() 1981 1982 if 'glyf' in font: 1983 self.log("Closing glyph list over 'glyf': %d glyphs before" % 1984 len(self.glyphs)) 1985 self.log.glyphs(self.glyphs, font=font) 1986 font['glyf'].closure_glyphs(self) 1987 self.glyphs.intersection_update(realGlyphs) 1988 self.log("Closed glyph list over 'glyf': %d glyphs after" % 1989 len(self.glyphs)) 1990 self.log.glyphs(self.glyphs, font=font) 1991 self.log.lapse("close glyph list over 'glyf'") 1992 self.glyphs_glyfed = self.glyphs.copy() 1993 1994 self.glyphs_all = self.glyphs.copy() 1995 1996 self.log("Retaining %d glyphs: " % len(self.glyphs_all)) 1997 1998 del self.glyphs 1999 2000 2001 def _subset_glyphs(self, font): 2002 for tag in font.keys(): 2003 if tag == 'GlyphOrder': continue 2004 clazz = ttLib.getTableClass(tag) 2005 2006 if tag in self.options.no_subset_tables: 2007 self.log(tag, "subsetting not needed") 2008 elif hasattr(clazz, 'subset_glyphs'): 2009 table = font[tag] 2010 self.glyphs = self.glyphs_all 2011 retain = table.subset_glyphs(self) 2012 del self.glyphs 2013 self.log.lapse("subset '%s'" % tag) 2014 if not retain: 2015 self.log(tag, "subsetted to empty; dropped") 2016 del font[tag] 2017 else: 2018 self.log(tag, "subsetted") 2019 else: 2020 self.log(tag, "NOT subset; don't know how to subset; dropped") 2021 del font[tag] 2022 2023 glyphOrder = font.getGlyphOrder() 2024 glyphOrder = [g for g in glyphOrder if g in self.glyphs_all] 2025 font.setGlyphOrder(glyphOrder) 2026 font._buildReverseGlyphOrderDict() 2027 self.log.lapse("subset GlyphOrder") 2028 2029 def _prune_post_subset(self, font): 2030 for tag in font.keys(): 2031 if tag == 'GlyphOrder': continue 2032 clazz = ttLib.getTableClass(tag) 2033 if hasattr(clazz, 'prune_post_subset'): 2034 table = font[tag] 2035 retain = table.prune_post_subset(self.options) 2036 self.log.lapse("prune '%s'" % tag) 2037 if not retain: 2038 self.log(tag, "pruned to empty; dropped") 2039 del font[tag] 2040 else: 2041 self.log(tag, "pruned") 2042 2043 def subset(self, font): 2044 2045 self._prune_pre_subset(font) 2046 self._closure_glyphs(font) 2047 self._subset_glyphs(font) 2048 self._prune_post_subset(font) 2049 2050 2051class Logger(object): 2052 2053 def __init__(self, verbose=False, xml=False, timing=False): 2054 self.verbose = verbose 2055 self.xml = xml 2056 self.timing = timing 2057 self.last_time = self.start_time = time.time() 2058 2059 def parse_opts(self, argv): 2060 argv = argv[:] 2061 for v in ['verbose', 'xml', 'timing']: 2062 if "--"+v in argv: 2063 setattr(self, v, True) 2064 argv.remove("--"+v) 2065 return argv 2066 2067 def __call__(self, *things): 2068 if not self.verbose: 2069 return 2070 print(' '.join(str(x) for x in things)) 2071 2072 def lapse(self, *things): 2073 if not self.timing: 2074 return 2075 new_time = time.time() 2076 print("Took %0.3fs to %s" %(new_time - self.last_time, 2077 ' '.join(str(x) for x in things))) 2078 self.last_time = new_time 2079 2080 def glyphs(self, glyphs, font=None): 2081 if not self.verbose: 2082 return 2083 self("Names: ", sorted(glyphs)) 2084 if font: 2085 reverseGlyphMap = font.getReverseGlyphMap() 2086 self("Gids : ", sorted(reverseGlyphMap[g] for g in glyphs)) 2087 2088 def font(self, font, file=sys.stdout): 2089 if not self.xml: 2090 return 2091 from fontTools.misc import xmlWriter 2092 writer = xmlWriter.XMLWriter(file) 2093 for tag in font.keys(): 2094 writer.begintag(tag) 2095 writer.newline() 2096 font[tag].toXML(writer, font) 2097 writer.endtag(tag) 2098 writer.newline() 2099 2100 2101def load_font(fontFile, 2102 options, 2103 allowVID=False, 2104 checkChecksums=False, 2105 dontLoadGlyphNames=False, 2106 lazy=True): 2107 2108 font = ttLib.TTFont(fontFile, 2109 allowVID=allowVID, 2110 checkChecksums=checkChecksums, 2111 recalcBBoxes=options.recalc_bounds, 2112 lazy=lazy) 2113 2114 # Hack: 2115 # 2116 # If we don't need glyph names, change 'post' class to not try to 2117 # load them. It avoid lots of headache with broken fonts as well 2118 # as loading time. 2119 # 2120 # Ideally ttLib should provide a way to ask it to skip loading 2121 # glyph names. But it currently doesn't provide such a thing. 2122 # 2123 if dontLoadGlyphNames: 2124 post = ttLib.getTableClass('post') 2125 saved = post.decode_format_2_0 2126 post.decode_format_2_0 = post.decode_format_3_0 2127 f = font['post'] 2128 if f.formatType == 2.0: 2129 f.formatType = 3.0 2130 post.decode_format_2_0 = saved 2131 2132 return font 2133 2134def save_font(font, outfile, options): 2135 if options.flavor and not hasattr(font, 'flavor'): 2136 raise Exception("fonttools version does not support flavors.") 2137 font.flavor = options.flavor 2138 font.save(outfile, reorderTables=options.canonical_order) 2139 2140def main(args): 2141 2142 log = Logger() 2143 args = log.parse_opts(args) 2144 2145 options = Options() 2146 args = options.parse_opts(args, ignore_unknown=['text']) 2147 2148 if len(args) < 2: 2149 print("usage: pyftsubset font-file glyph... [--text=ABC]... [--option=value]...", file=sys.stderr) 2150 sys.exit(1) 2151 2152 fontfile = args[0] 2153 args = args[1:] 2154 2155 dontLoadGlyphNames =(not options.glyph_names and 2156 all(any(g.startswith(p) 2157 for p in ['gid', 'glyph', 'uni', 'U+']) 2158 for g in args)) 2159 2160 font = load_font(fontfile, options, dontLoadGlyphNames=dontLoadGlyphNames) 2161 log.lapse("load font") 2162 subsetter = Subsetter(options=options, log=log) 2163 2164 names = font.getGlyphNames() 2165 log.lapse("loading glyph names") 2166 2167 glyphs = [] 2168 unicodes = [] 2169 text = "" 2170 for g in args: 2171 if g == '*': 2172 glyphs.extend(font.getGlyphOrder()) 2173 continue 2174 if g in names: 2175 glyphs.append(g) 2176 continue 2177 if g.startswith('--text='): 2178 text += g[7:] 2179 continue 2180 if g.startswith('uni') or g.startswith('U+'): 2181 if g.startswith('uni') and len(g) > 3: 2182 g = g[3:] 2183 elif g.startswith('U+') and len(g) > 2: 2184 g = g[2:] 2185 u = int(g, 16) 2186 unicodes.append(u) 2187 continue 2188 if g.startswith('gid') or g.startswith('glyph'): 2189 if g.startswith('gid') and len(g) > 3: 2190 g = g[3:] 2191 elif g.startswith('glyph') and len(g) > 5: 2192 g = g[5:] 2193 try: 2194 glyphs.append(font.getGlyphName(int(g), requireReal=True)) 2195 except ValueError: 2196 raise Exception("Invalid glyph identifier: %s" % g) 2197 continue 2198 raise Exception("Invalid glyph identifier: %s" % g) 2199 log.lapse("compile glyph list") 2200 log("Unicodes:", unicodes) 2201 log("Glyphs:", glyphs) 2202 2203 subsetter.populate(glyphs=glyphs, unicodes=unicodes, text=text) 2204 subsetter.subset(font) 2205 2206 outfile = fontfile + '.subset' 2207 2208 save_font (font, outfile, options) 2209 log.lapse("compile and save font") 2210 2211 log.last_time = log.start_time 2212 log.lapse("make one with everything(TOTAL TIME)") 2213 2214 if log.verbose: 2215 import os 2216 log("Input font: %d bytes" % os.path.getsize(fontfile)) 2217 log("Subset font: %d bytes" % os.path.getsize(outfile)) 2218 2219 log.font(font) 2220 2221 font.close() 2222 2223 2224__all__ = [ 2225 'Options', 2226 'Subsetter', 2227 'Logger', 2228 'load_font', 2229 'save_font', 2230 'main' 2231] 2232 2233if __name__ == '__main__': 2234 main(sys.argv[1:]) 2235