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What is an OpenType font file?
OpenType® is a cross-platform font file format developed jointly by Adobe and Microsoft. The OpenType format is an extension of the TrueType SFNT format that also can support Adobe® PostScript® font data and new typographic features.
How does OpenType work?
OpenType is a kind of superset of Type 1 and TrueType font formats, with added enhancements. It is backward-compatible with applications that support Type 1 and TrueType fonts (including design applications and printer drivers), and you can mix OpenType fonts with other font formats without a problem.
Why do you need a baseline table in OpenType?
The Baseline table (BASE) provides information used to align glyphs of different scripts and sizes in a line of text, whether the glyphs are in the same font or in different fonts. To improve text layout, the Baseline table also provides minimum (min) and maximum (max) glyph extent values for each script, language system, or feature in a font.
What’s the difference between OpenType and TrueType Open?
OpenType, also known as TrueType Open version 2, is an extension of Microsoft’s TrueType Open format, adding support for Type 1 data. An OpenType font can have Type 1 data only, TrueType data only, or both.
Such a format is useful for distributing an entire typeface (font family) in just one file. By combining related fonts into a single file, font tables that are identical can be shared, thereby allowing for more efficient storage.
Which is the outline format for OpenType fonts?
The OpenType standard does not specify the outline data format: rather, it accommodates any of several existing standards. Sometimes terms like “OpenType (PostScript flavor)” (= “Type 1 OpenType”, “OpenType CFF”) or “OpenType (TrueType flavor)” are used to indicate which outline format a particular OpenType font file contains.