Source code for fontTools.ttLib.tables.O_S_2f_2

from fontTools.misc import sstruct
from fontTools.misc.roundTools import otRound
from fontTools.misc.textTools import safeEval, num2binary, binary2num
from fontTools.ttLib.tables import DefaultTable
import bisect
import logging


log = logging.getLogger(__name__)

# panose classification

panoseFormat = """
	bFamilyType:        B
	bSerifStyle:        B
	bWeight:            B
	bProportion:        B
	bContrast:          B
	bStrokeVariation:   B
	bArmStyle:          B
	bLetterForm:        B
	bMidline:           B
	bXHeight:           B
"""


[docs] class Panose(object): def __init__(self, **kwargs): _, names, _ = sstruct.getformat(panoseFormat) for name in names: setattr(self, name, kwargs.pop(name, 0)) for k in kwargs: raise TypeError(f"Panose() got an unexpected keyword argument {k!r}")
[docs] def toXML(self, writer, ttFont): formatstring, names, fixes = sstruct.getformat(panoseFormat) for name in names: writer.simpletag(name, value=getattr(self, name)) writer.newline()
[docs] def fromXML(self, name, attrs, content, ttFont): setattr(self, name, safeEval(attrs["value"]))
# 'sfnt' OS/2 and Windows Metrics table - 'OS/2' OS2_format_0 = """ > # big endian version: H # version xAvgCharWidth: h # average character width usWeightClass: H # degree of thickness of strokes usWidthClass: H # aspect ratio fsType: H # type flags ySubscriptXSize: h # subscript horizontal font size ySubscriptYSize: h # subscript vertical font size ySubscriptXOffset: h # subscript x offset ySubscriptYOffset: h # subscript y offset ySuperscriptXSize: h # superscript horizontal font size ySuperscriptYSize: h # superscript vertical font size ySuperscriptXOffset: h # superscript x offset ySuperscriptYOffset: h # superscript y offset yStrikeoutSize: h # strikeout size yStrikeoutPosition: h # strikeout position sFamilyClass: h # font family class and subclass panose: 10s # panose classification number ulUnicodeRange1: L # character range ulUnicodeRange2: L # character range ulUnicodeRange3: L # character range ulUnicodeRange4: L # character range achVendID: 4s # font vendor identification fsSelection: H # font selection flags usFirstCharIndex: H # first unicode character index usLastCharIndex: H # last unicode character index sTypoAscender: h # typographic ascender sTypoDescender: h # typographic descender sTypoLineGap: h # typographic line gap usWinAscent: H # Windows ascender usWinDescent: H # Windows descender """ OS2_format_1_addition = """ ulCodePageRange1: L ulCodePageRange2: L """ OS2_format_2_addition = ( OS2_format_1_addition + """ sxHeight: h sCapHeight: h usDefaultChar: H usBreakChar: H usMaxContext: H """ ) OS2_format_5_addition = ( OS2_format_2_addition + """ usLowerOpticalPointSize: H usUpperOpticalPointSize: H """ ) bigendian = " > # big endian\n" OS2_format_1 = OS2_format_0 + OS2_format_1_addition OS2_format_2 = OS2_format_0 + OS2_format_2_addition OS2_format_5 = OS2_format_0 + OS2_format_5_addition OS2_format_1_addition = bigendian + OS2_format_1_addition OS2_format_2_addition = bigendian + OS2_format_2_addition OS2_format_5_addition = bigendian + OS2_format_5_addition
[docs] class table_O_S_2f_2(DefaultTable.DefaultTable): """the OS/2 table""" dependencies = ["head"]
[docs] def decompile(self, data, ttFont): dummy, data = sstruct.unpack2(OS2_format_0, data, self) if self.version == 1: dummy, data = sstruct.unpack2(OS2_format_1_addition, data, self) elif self.version in (2, 3, 4): dummy, data = sstruct.unpack2(OS2_format_2_addition, data, self) elif self.version == 5: dummy, data = sstruct.unpack2(OS2_format_5_addition, data, self) self.usLowerOpticalPointSize /= 20 self.usUpperOpticalPointSize /= 20 elif self.version != 0: from fontTools import ttLib raise ttLib.TTLibError( "unknown format for OS/2 table: version %s" % self.version ) if len(data): log.warning("too much 'OS/2' table data") self.panose = sstruct.unpack(panoseFormat, self.panose, Panose())
[docs] def compile(self, ttFont): self.updateFirstAndLastCharIndex(ttFont) panose = self.panose head = ttFont["head"] if (self.fsSelection & 1) and not (head.macStyle & 1 << 1): log.warning( "fsSelection bit 0 (italic) and " "head table macStyle bit 1 (italic) should match" ) if (self.fsSelection & 1 << 5) and not (head.macStyle & 1): log.warning( "fsSelection bit 5 (bold) and " "head table macStyle bit 0 (bold) should match" ) if (self.fsSelection & 1 << 6) and (self.fsSelection & 1 + (1 << 5)): log.warning( "fsSelection bit 6 (regular) is set, " "bits 0 (italic) and 5 (bold) must be clear" ) if self.version < 4 and self.fsSelection & 0b1110000000: log.warning( "fsSelection bits 7, 8 and 9 are only defined in " "OS/2 table version 4 and up: version %s", self.version, ) self.panose = sstruct.pack(panoseFormat, self.panose) if self.version == 0: data = sstruct.pack(OS2_format_0, self) elif self.version == 1: data = sstruct.pack(OS2_format_1, self) elif self.version in (2, 3, 4): data = sstruct.pack(OS2_format_2, self) elif self.version == 5: d = self.__dict__.copy() d["usLowerOpticalPointSize"] = round(self.usLowerOpticalPointSize * 20) d["usUpperOpticalPointSize"] = round(self.usUpperOpticalPointSize * 20) data = sstruct.pack(OS2_format_5, d) else: from fontTools import ttLib raise ttLib.TTLibError( "unknown format for OS/2 table: version %s" % self.version ) self.panose = panose return data
[docs] def toXML(self, writer, ttFont): writer.comment( "The fields 'usFirstCharIndex' and 'usLastCharIndex'\n" "will be recalculated by the compiler" ) writer.newline() if self.version == 1: format = OS2_format_1 elif self.version in (2, 3, 4): format = OS2_format_2 elif self.version == 5: format = OS2_format_5 else: format = OS2_format_0 formatstring, names, fixes = sstruct.getformat(format) for name in names: value = getattr(self, name) if name == "panose": writer.begintag("panose") writer.newline() value.toXML(writer, ttFont) writer.endtag("panose") elif name in ( "ulUnicodeRange1", "ulUnicodeRange2", "ulUnicodeRange3", "ulUnicodeRange4", "ulCodePageRange1", "ulCodePageRange2", ): writer.simpletag(name, value=num2binary(value)) elif name in ("fsType", "fsSelection"): writer.simpletag(name, value=num2binary(value, 16)) elif name == "achVendID": writer.simpletag(name, value=repr(value)[1:-1]) else: writer.simpletag(name, value=value) writer.newline()
[docs] def fromXML(self, name, attrs, content, ttFont): if name == "panose": self.panose = panose = Panose() for element in content: if isinstance(element, tuple): name, attrs, content = element panose.fromXML(name, attrs, content, ttFont) elif name in ( "ulUnicodeRange1", "ulUnicodeRange2", "ulUnicodeRange3", "ulUnicodeRange4", "ulCodePageRange1", "ulCodePageRange2", "fsType", "fsSelection", ): setattr(self, name, binary2num(attrs["value"])) elif name == "achVendID": setattr(self, name, safeEval("'''" + attrs["value"] + "'''")) else: setattr(self, name, safeEval(attrs["value"]))
[docs] def updateFirstAndLastCharIndex(self, ttFont): if "cmap" not in ttFont: return codes = set() for table in getattr(ttFont["cmap"], "tables", []): if table.isUnicode(): codes.update(table.cmap.keys()) if codes: minCode = min(codes) maxCode = max(codes) # USHORT cannot hold codepoints greater than 0xFFFF self.usFirstCharIndex = min(0xFFFF, minCode) self.usLastCharIndex = min(0xFFFF, maxCode)
# misspelled attributes kept for legacy reasons @property def usMaxContex(self): return self.usMaxContext @usMaxContex.setter def usMaxContex(self, value): self.usMaxContext = value @property def fsFirstCharIndex(self): return self.usFirstCharIndex @fsFirstCharIndex.setter def fsFirstCharIndex(self, value): self.usFirstCharIndex = value @property def fsLastCharIndex(self): return self.usLastCharIndex @fsLastCharIndex.setter def fsLastCharIndex(self, value): self.usLastCharIndex = value
[docs] def getUnicodeRanges(self): """Return the set of 'ulUnicodeRange*' bits currently enabled.""" bits = set() ul1, ul2 = self.ulUnicodeRange1, self.ulUnicodeRange2 ul3, ul4 = self.ulUnicodeRange3, self.ulUnicodeRange4 for i in range(32): if ul1 & (1 << i): bits.add(i) if ul2 & (1 << i): bits.add(i + 32) if ul3 & (1 << i): bits.add(i + 64) if ul4 & (1 << i): bits.add(i + 96) return bits
[docs] def setUnicodeRanges(self, bits): """Set the 'ulUnicodeRange*' fields to the specified 'bits'.""" ul1, ul2, ul3, ul4 = 0, 0, 0, 0 for bit in bits: if 0 <= bit < 32: ul1 |= 1 << bit elif 32 <= bit < 64: ul2 |= 1 << (bit - 32) elif 64 <= bit < 96: ul3 |= 1 << (bit - 64) elif 96 <= bit < 123: ul4 |= 1 << (bit - 96) else: raise ValueError("expected 0 <= int <= 122, found: %r" % bit) self.ulUnicodeRange1, self.ulUnicodeRange2 = ul1, ul2 self.ulUnicodeRange3, self.ulUnicodeRange4 = ul3, ul4
[docs] def recalcUnicodeRanges(self, ttFont, pruneOnly=False): """Intersect the codepoints in the font's Unicode cmap subtables with the Unicode block ranges defined in the OpenType specification (v1.7), and set the respective 'ulUnicodeRange*' bits if there is at least ONE intersection. If 'pruneOnly' is True, only clear unused bits with NO intersection. """ unicodes = set() for table in ttFont["cmap"].tables: if table.isUnicode(): unicodes.update(table.cmap.keys()) if pruneOnly: empty = intersectUnicodeRanges(unicodes, inverse=True) bits = self.getUnicodeRanges() - empty else: bits = intersectUnicodeRanges(unicodes) self.setUnicodeRanges(bits) return bits
[docs] def getCodePageRanges(self): """Return the set of 'ulCodePageRange*' bits currently enabled.""" bits = set() if self.version < 1: return bits ul1, ul2 = self.ulCodePageRange1, self.ulCodePageRange2 for i in range(32): if ul1 & (1 << i): bits.add(i) if ul2 & (1 << i): bits.add(i + 32) return bits
[docs] def setCodePageRanges(self, bits): """Set the 'ulCodePageRange*' fields to the specified 'bits'.""" ul1, ul2 = 0, 0 for bit in bits: if 0 <= bit < 32: ul1 |= 1 << bit elif 32 <= bit < 64: ul2 |= 1 << (bit - 32) else: raise ValueError(f"expected 0 <= int <= 63, found: {bit:r}") if self.version < 1: self.version = 1 self.ulCodePageRange1, self.ulCodePageRange2 = ul1, ul2
[docs] def recalcCodePageRanges(self, ttFont, pruneOnly=False): unicodes = set() for table in ttFont["cmap"].tables: if table.isUnicode(): unicodes.update(table.cmap.keys()) bits = calcCodePageRanges(unicodes) if pruneOnly: bits &= self.getCodePageRanges() # when no codepage ranges can be enabled, fall back to enabling bit 0 # (Latin 1) so that the font works in MS Word: # https://github.com/googlei18n/fontmake/issues/468 if not bits: bits = {0} self.setCodePageRanges(bits) return bits
[docs] def recalcAvgCharWidth(self, ttFont): """Recalculate xAvgCharWidth using metrics from ttFont's 'hmtx' table. Set it to 0 if the unlikely event 'hmtx' table is not found. """ avg_width = 0 hmtx = ttFont.get("hmtx") if hmtx is not None: widths = [width for width, _ in hmtx.metrics.values() if width > 0] if widths: avg_width = otRound(sum(widths) / len(widths)) self.xAvgCharWidth = avg_width return avg_width
# Unicode ranges data from the OpenType OS/2 table specification v1.7 OS2_UNICODE_RANGES = ( (("Basic Latin", (0x0000, 0x007F)),), (("Latin-1 Supplement", (0x0080, 0x00FF)),), (("Latin Extended-A", (0x0100, 0x017F)),), (("Latin Extended-B", (0x0180, 0x024F)),), ( ("IPA Extensions", (0x0250, 0x02AF)), ("Phonetic Extensions", (0x1D00, 0x1D7F)), ("Phonetic Extensions Supplement", (0x1D80, 0x1DBF)), ), ( ("Spacing Modifier Letters", (0x02B0, 0x02FF)), ("Modifier Tone Letters", (0xA700, 0xA71F)), ), ( ("Combining Diacritical Marks", (0x0300, 0x036F)), ("Combining Diacritical Marks Supplement", (0x1DC0, 0x1DFF)), ), (("Greek and Coptic", (0x0370, 0x03FF)),), (("Coptic", (0x2C80, 0x2CFF)),), ( ("Cyrillic", (0x0400, 0x04FF)), ("Cyrillic Supplement", (0x0500, 0x052F)), ("Cyrillic Extended-A", (0x2DE0, 0x2DFF)), ("Cyrillic Extended-B", (0xA640, 0xA69F)), ), (("Armenian", (0x0530, 0x058F)),), (("Hebrew", (0x0590, 0x05FF)),), (("Vai", (0xA500, 0xA63F)),), (("Arabic", (0x0600, 0x06FF)), ("Arabic Supplement", (0x0750, 0x077F))), (("NKo", (0x07C0, 0x07FF)),), (("Devanagari", (0x0900, 0x097F)),), (("Bengali", (0x0980, 0x09FF)),), (("Gurmukhi", (0x0A00, 0x0A7F)),), (("Gujarati", (0x0A80, 0x0AFF)),), (("Oriya", (0x0B00, 0x0B7F)),), (("Tamil", (0x0B80, 0x0BFF)),), (("Telugu", (0x0C00, 0x0C7F)),), (("Kannada", (0x0C80, 0x0CFF)),), (("Malayalam", (0x0D00, 0x0D7F)),), (("Thai", (0x0E00, 0x0E7F)),), (("Lao", (0x0E80, 0x0EFF)),), (("Georgian", (0x10A0, 0x10FF)), ("Georgian Supplement", (0x2D00, 0x2D2F))), (("Balinese", (0x1B00, 0x1B7F)),), (("Hangul Jamo", (0x1100, 0x11FF)),), ( ("Latin Extended Additional", (0x1E00, 0x1EFF)), ("Latin Extended-C", (0x2C60, 0x2C7F)), ("Latin Extended-D", (0xA720, 0xA7FF)), ), (("Greek Extended", (0x1F00, 0x1FFF)),), ( ("General Punctuation", (0x2000, 0x206F)), ("Supplemental Punctuation", (0x2E00, 0x2E7F)), ), (("Superscripts And Subscripts", (0x2070, 0x209F)),), (("Currency Symbols", (0x20A0, 0x20CF)),), (("Combining Diacritical Marks For Symbols", (0x20D0, 0x20FF)),), (("Letterlike Symbols", (0x2100, 0x214F)),), (("Number Forms", (0x2150, 0x218F)),), ( ("Arrows", (0x2190, 0x21FF)), ("Supplemental Arrows-A", (0x27F0, 0x27FF)), ("Supplemental Arrows-B", (0x2900, 0x297F)), ("Miscellaneous Symbols and Arrows", (0x2B00, 0x2BFF)), ), ( ("Mathematical Operators", (0x2200, 0x22FF)), ("Supplemental Mathematical Operators", (0x2A00, 0x2AFF)), ("Miscellaneous Mathematical Symbols-A", (0x27C0, 0x27EF)), ("Miscellaneous Mathematical Symbols-B", (0x2980, 0x29FF)), ), (("Miscellaneous Technical", (0x2300, 0x23FF)),), (("Control Pictures", (0x2400, 0x243F)),), (("Optical Character Recognition", (0x2440, 0x245F)),), (("Enclosed Alphanumerics", (0x2460, 0x24FF)),), (("Box Drawing", (0x2500, 0x257F)),), (("Block Elements", (0x2580, 0x259F)),), (("Geometric Shapes", (0x25A0, 0x25FF)),), (("Miscellaneous Symbols", (0x2600, 0x26FF)),), (("Dingbats", (0x2700, 0x27BF)),), (("CJK Symbols And Punctuation", (0x3000, 0x303F)),), (("Hiragana", (0x3040, 0x309F)),), ( ("Katakana", (0x30A0, 0x30FF)), ("Katakana Phonetic Extensions", (0x31F0, 0x31FF)), ), (("Bopomofo", (0x3100, 0x312F)), ("Bopomofo Extended", (0x31A0, 0x31BF))), (("Hangul Compatibility Jamo", (0x3130, 0x318F)),), (("Phags-pa", (0xA840, 0xA87F)),), (("Enclosed CJK Letters And Months", (0x3200, 0x32FF)),), (("CJK Compatibility", (0x3300, 0x33FF)),), (("Hangul Syllables", (0xAC00, 0xD7AF)),), (("Non-Plane 0 *", (0xD800, 0xDFFF)),), (("Phoenician", (0x10900, 0x1091F)),), ( ("CJK Unified Ideographs", (0x4E00, 0x9FFF)), ("CJK Radicals Supplement", (0x2E80, 0x2EFF)), ("Kangxi Radicals", (0x2F00, 0x2FDF)), ("Ideographic Description Characters", (0x2FF0, 0x2FFF)), ("CJK Unified Ideographs Extension A", (0x3400, 0x4DBF)), ("CJK Unified Ideographs Extension B", (0x20000, 0x2A6DF)), ("Kanbun", (0x3190, 0x319F)), ), (("Private Use Area (plane 0)", (0xE000, 0xF8FF)),), ( ("CJK Strokes", (0x31C0, 0x31EF)), ("CJK Compatibility Ideographs", (0xF900, 0xFAFF)), ("CJK Compatibility Ideographs Supplement", (0x2F800, 0x2FA1F)), ), (("Alphabetic Presentation Forms", (0xFB00, 0xFB4F)),), (("Arabic Presentation Forms-A", (0xFB50, 0xFDFF)),), (("Combining Half Marks", (0xFE20, 0xFE2F)),), ( ("Vertical Forms", (0xFE10, 0xFE1F)), ("CJK Compatibility Forms", (0xFE30, 0xFE4F)), ), (("Small Form Variants", (0xFE50, 0xFE6F)),), (("Arabic Presentation Forms-B", (0xFE70, 0xFEFF)),), (("Halfwidth And Fullwidth Forms", (0xFF00, 0xFFEF)),), (("Specials", (0xFFF0, 0xFFFF)),), (("Tibetan", (0x0F00, 0x0FFF)),), (("Syriac", (0x0700, 0x074F)),), (("Thaana", (0x0780, 0x07BF)),), (("Sinhala", (0x0D80, 0x0DFF)),), (("Myanmar", (0x1000, 0x109F)),), ( ("Ethiopic", (0x1200, 0x137F)), ("Ethiopic Supplement", (0x1380, 0x139F)), ("Ethiopic Extended", (0x2D80, 0x2DDF)), ), (("Cherokee", (0x13A0, 0x13FF)),), (("Unified Canadian Aboriginal Syllabics", (0x1400, 0x167F)),), (("Ogham", (0x1680, 0x169F)),), (("Runic", (0x16A0, 0x16FF)),), (("Khmer", (0x1780, 0x17FF)), ("Khmer Symbols", (0x19E0, 0x19FF))), (("Mongolian", (0x1800, 0x18AF)),), (("Braille Patterns", (0x2800, 0x28FF)),), (("Yi Syllables", (0xA000, 0xA48F)), ("Yi Radicals", (0xA490, 0xA4CF))), ( ("Tagalog", (0x1700, 0x171F)), ("Hanunoo", (0x1720, 0x173F)), ("Buhid", (0x1740, 0x175F)), ("Tagbanwa", (0x1760, 0x177F)), ), (("Old Italic", (0x10300, 0x1032F)),), (("Gothic", (0x10330, 0x1034F)),), (("Deseret", (0x10400, 0x1044F)),), ( ("Byzantine Musical Symbols", (0x1D000, 0x1D0FF)), ("Musical Symbols", (0x1D100, 0x1D1FF)), ("Ancient Greek Musical Notation", (0x1D200, 0x1D24F)), ), (("Mathematical Alphanumeric Symbols", (0x1D400, 0x1D7FF)),), ( ("Private Use (plane 15)", (0xF0000, 0xFFFFD)), ("Private Use (plane 16)", (0x100000, 0x10FFFD)), ), ( ("Variation Selectors", (0xFE00, 0xFE0F)), ("Variation Selectors Supplement", (0xE0100, 0xE01EF)), ), (("Tags", (0xE0000, 0xE007F)),), (("Limbu", (0x1900, 0x194F)),), (("Tai Le", (0x1950, 0x197F)),), (("New Tai Lue", (0x1980, 0x19DF)),), (("Buginese", (0x1A00, 0x1A1F)),), (("Glagolitic", (0x2C00, 0x2C5F)),), (("Tifinagh", (0x2D30, 0x2D7F)),), (("Yijing Hexagram Symbols", (0x4DC0, 0x4DFF)),), (("Syloti Nagri", (0xA800, 0xA82F)),), ( ("Linear B Syllabary", (0x10000, 0x1007F)), ("Linear B Ideograms", (0x10080, 0x100FF)), ("Aegean Numbers", (0x10100, 0x1013F)), ), (("Ancient Greek Numbers", (0x10140, 0x1018F)),), (("Ugaritic", (0x10380, 0x1039F)),), (("Old Persian", (0x103A0, 0x103DF)),), (("Shavian", (0x10450, 0x1047F)),), (("Osmanya", (0x10480, 0x104AF)),), (("Cypriot Syllabary", (0x10800, 0x1083F)),), (("Kharoshthi", (0x10A00, 0x10A5F)),), (("Tai Xuan Jing Symbols", (0x1D300, 0x1D35F)),), ( ("Cuneiform", (0x12000, 0x123FF)), ("Cuneiform Numbers and Punctuation", (0x12400, 0x1247F)), ), (("Counting Rod Numerals", (0x1D360, 0x1D37F)),), (("Sundanese", (0x1B80, 0x1BBF)),), (("Lepcha", (0x1C00, 0x1C4F)),), (("Ol Chiki", (0x1C50, 0x1C7F)),), (("Saurashtra", (0xA880, 0xA8DF)),), (("Kayah Li", (0xA900, 0xA92F)),), (("Rejang", (0xA930, 0xA95F)),), (("Cham", (0xAA00, 0xAA5F)),), (("Ancient Symbols", (0x10190, 0x101CF)),), (("Phaistos Disc", (0x101D0, 0x101FF)),), ( ("Carian", (0x102A0, 0x102DF)), ("Lycian", (0x10280, 0x1029F)), ("Lydian", (0x10920, 0x1093F)), ), (("Domino Tiles", (0x1F030, 0x1F09F)), ("Mahjong Tiles", (0x1F000, 0x1F02F))), ) _unicodeStarts = [] _unicodeValues = [None] def _getUnicodeRanges(): # build the ranges of codepoints for each unicode range bit, and cache result if not _unicodeStarts: unicodeRanges = [ (start, (stop, bit)) for bit, blocks in enumerate(OS2_UNICODE_RANGES) for _, (start, stop) in blocks ] for start, (stop, bit) in sorted(unicodeRanges): _unicodeStarts.append(start) _unicodeValues.append((stop, bit)) return _unicodeStarts, _unicodeValues
[docs] def intersectUnicodeRanges(unicodes, inverse=False): """Intersect a sequence of (int) Unicode codepoints with the Unicode block ranges defined in the OpenType specification v1.7, and return the set of 'ulUnicodeRanges' bits for which there is at least ONE intersection. If 'inverse' is True, return the the bits for which there is NO intersection. >>> intersectUnicodeRanges([0x0410]) == {9} True >>> intersectUnicodeRanges([0x0410, 0x1F000]) == {9, 57, 122} True >>> intersectUnicodeRanges([0x0410, 0x1F000], inverse=True) == ( ... set(range(len(OS2_UNICODE_RANGES))) - {9, 57, 122}) True """ unicodes = set(unicodes) unicodestarts, unicodevalues = _getUnicodeRanges() bits = set() for code in unicodes: stop, bit = unicodevalues[bisect.bisect(unicodestarts, code)] if code <= stop: bits.add(bit) # The spec says that bit 57 ("Non Plane 0") implies that there's # at least one codepoint beyond the BMP; so I also include all # the non-BMP codepoints here if any(0x10000 <= code < 0x110000 for code in unicodes): bits.add(57) return set(range(len(OS2_UNICODE_RANGES))) - bits if inverse else bits
[docs] def calcCodePageRanges(unicodes): """Given a set of Unicode codepoints (integers), calculate the corresponding OS/2 CodePage range bits. This is a direct translation of FontForge implementation: https://github.com/fontforge/fontforge/blob/7b2c074/fontforge/tottf.c#L3158 """ bits = set() hasAscii = set(range(0x20, 0x7E)).issubset(unicodes) hasLineart = ord("┤") in unicodes for uni in unicodes: if uni == ord("Þ") and hasAscii: bits.add(0) # Latin 1 elif uni == ord("Ľ") and hasAscii: bits.add(1) # Latin 2: Eastern Europe if hasLineart: bits.add(58) # Latin 2 elif uni == ord("Б"): bits.add(2) # Cyrillic if ord("Ѕ") in unicodes and hasLineart: bits.add(57) # IBM Cyrillic if ord("╜") in unicodes and hasLineart: bits.add(49) # MS-DOS Russian elif uni == ord("Ά"): bits.add(3) # Greek if hasLineart and ord("½") in unicodes: bits.add(48) # IBM Greek if hasLineart and ord("√") in unicodes: bits.add(60) # Greek, former 437 G elif uni == ord("İ") and hasAscii: bits.add(4) # Turkish if hasLineart: bits.add(56) # IBM turkish elif uni == ord("א"): bits.add(5) # Hebrew if hasLineart and ord("√") in unicodes: bits.add(53) # Hebrew elif uni == ord("ر"): bits.add(6) # Arabic if ord("√") in unicodes: bits.add(51) # Arabic if hasLineart: bits.add(61) # Arabic; ASMO 708 elif uni == ord("ŗ") and hasAscii: bits.add(7) # Windows Baltic if hasLineart: bits.add(59) # MS-DOS Baltic elif uni == ord("₫") and hasAscii: bits.add(8) # Vietnamese elif uni == ord("ๅ"): bits.add(16) # Thai elif uni == ord("エ"): bits.add(17) # JIS/Japan elif uni == ord("ㄅ"): bits.add(18) # Chinese: Simplified elif uni == ord("ㄱ"): bits.add(19) # Korean wansung elif uni == ord("央"): bits.add(20) # Chinese: Traditional elif uni == ord("곴"): bits.add(21) # Korean Johab elif uni == ord("♥") and hasAscii: bits.add(30) # OEM Character Set # TODO: Symbol bit has a special meaning (check the spec), we need # to confirm if this is wanted by default. # elif chr(0xF000) <= char <= chr(0xF0FF): # codepageRanges.add(31) # Symbol Character Set elif uni == ord("þ") and hasAscii and hasLineart: bits.add(54) # MS-DOS Icelandic elif uni == ord("╚") and hasAscii: bits.add(62) # WE/Latin 1 bits.add(63) # US elif hasAscii and hasLineart and ord("√") in unicodes: if uni == ord("Å"): bits.add(50) # MS-DOS Nordic elif uni == ord("é"): bits.add(52) # MS-DOS Canadian French elif uni == ord("õ"): bits.add(55) # MS-DOS Portuguese if hasAscii and ord("‰") in unicodes and ord("∑") in unicodes: bits.add(29) # Macintosh Character Set (US Roman) return bits
if __name__ == "__main__": import doctest, sys sys.exit(doctest.testmod().failed)