# width: T2CharString glyph width optimizer

T2CharString glyph width optimizer.

CFF glyphs whose width equals the CFF Private dictionary’s `defaultWidthX` value do not need to specify their width in their charstring, saving bytes. This module determines the optimum `defaultWidthX` and `nominalWidthX` values for a font, when provided with a list of glyph widths.

fontTools.cffLib.width.optimizeWidths(widths)

  Given a list of glyph widths, or dictionary mapping glyph width to number of glyphs having that, returns a tuple of best CFF default and nominal glyph widths.

  This algorithm is linear in UPEM+numGlyphs.

fontTools.cffLib.width.main(args=None)

  Calculate optimum defaultWidthX/nominalWidthX values