Automatically generated by Pod::Man 4.07 (Pod::Simple 3.32) Standard preamble: ========================================================================
NAMEFont::TTF::OS_2 - the OS/2 table in a TTF font
INSTANCE VARIABLESNo other variables than those in table and those in the standard:
Version xAvgCharWidth usWeightClass usWidthClass fsType ySubscriptXSize ySubScriptYSize ySubscriptXOffset ySubscriptYOffset ySuperscriptXSize ySuperscriptYSize ySuperscriptXOffset ySuperscriptYOffset yStrikeoutSize yStrikeoutPosition sFamilyClass bFamilyType bSerifStyle bWeight bProportion bContrast bStrokeVariation bArmStyle bLetterform bMidline bXheight ulUnicodeRange1 ulUnicodeRange2 ulUnicodeRange3 ulUnicodeRange4 achVendID fsSelection usFirstCharIndex usLastCharIndex sTypoAscender sTypoDescender sTypoLineGap usWinAscent usWinDescent ulCodePageRange1 ulCodePageRange2 xHeight CapHeight defaultChar breakChar maxLookups
Notice that versions 0, 1, 2 & 3 of the table are supported. Notice also that the Panose variable has been broken down into its elements.
$t->readReads in the various values from disk (see details of
$t->out($fh)Writes the table to a file either from memory or by copying.
$t->XML_element($context, $depth, $key, $value)Tidies up the hex values to output them in hex
$t->XML_end($context, $tag, %attrs)Now handle them on the way back in
$t->minsize()Returns the minimum size this table can be. If it is smaller than this, then the table must be bad and should be deleted or whatever.
Updates the "firstChar" and "lastChar" values based on the
Updates the sTypoAscender, sTypoDescender & sTypoLineGap to be the same values as Ascender, Descender and Linegap from the hhea table (assuming it is dirty) and also sets usWinAscent to be the sum of Ascender+Linegap and usWinDescent to be the negative of Descender.
$t->guessRangeBits (\%map, [$cp_threshold, [%u_threshold]])Set the ulCodePageRange and ulUnicodeRange fields based on characters actually present in the font.
%map is a hash keyed by
The two optional parameters are percentage of characters within the codepage or unicode range that need to be present to constitute coverage. A threshold of 0 causes corresponding range bits to be set if any characters are present at all, while a negative value causes the corresponding range bits to be unchanged. Defaults are 50 and 0, respectively.
For codepage bits, the threshold is percentage of characters between 0xC0 and 0xFF that need to be present to constitute coverage). For codepages other than 1252, characters (e.g., punctuation) that are defined identically to cp1252 are ignored for the purposes of this percentage calculation. Looks only for
For Unicode range bits that represent multiple ranges, e.g., bit 29 represents:
Latin Extended Additional 1E00-1EFF Latin Extended-C 2C60-2C7F Latin Extended-D A720-A7FF
the bit will be set if any of these ranges meet the threshold requirement.
AUTHORMartin Hosken <scripts.sil.org/FontUtils>.
LICENSINGCopyright (c) 1998-2014,
This module is released under the terms of the Artistic License 2.0. For details, see the full text of the license in the file