Fonts are the essential elements of any portable document format (PDF) file, but are often taken for granted by most readers. But what if you are a developer and fonts are missing? What should you do? Why does this happen? In the first of a two-part white paper series, explore some of the core PDF concepts, font technologies, and get an introduction to the problem of missing fonts in PDF documents.
encoding is based on Unicode and as a result, can support up to 65,536 glyphs, OpenType offers more development flexibility especially when working with Asian character sets and more sophisticated Roman glyphs that may use non-lining numerals, small caps, fractions, ligatures, and swashes. Like TrueType, an OpenType font contains all of its outline, metric, and bitmap information in a single file. Font File Structures In addition to their technological differences, fonts can also be categorized according