http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html
http://www.thomasphinney.com/2011/03/point-size/
http://www.microsoft.com/typography/otspec/TTCH01.htm
http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html
http://www.thomasphinney.com/2011/03/point-size/
http://www.microsoft.com/typography/otspec/TTCH01.htm