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font::ttf::os_2

Font::TTF::OS_2(3)					User Contributed Perl Documentation					Font::TTF::OS_2(3)

NAME

       Font::TTF::OS_2 - the OS/2 table in a TTF font

DESCRIPTION

       The OS/2 table has two versions and forms, one an extension of the other. This module supports both forms and the switching between them.

INSTANCE VARIABLES

       No 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.

METHODS

   $t->read
       Reads in the various values from disk (see details of OS/2 table)

   $t->out($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->update
       Updates the OS/2 table by getting information from other sources:

       Updates the "firstChar" and "lastChar" values based on the MS table in the cmap.

       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.

BUGS

       None known

AUTHOR

       Martin Hosken Martin_Hosken@sil.org. See Font::TTF::Font for copyright and licensing.

perl v5.16.3							    2012-05-17							Font::TTF::OS_2(3)