OpenTypeCFF

OpenTypeCFF refers to an OpenType font file that uses the Compact Font Format (CFF) as its outline data format. OpenType is a modern font standard developed by Microsoft and Adobe, designed to extend the capabilities of TrueType and PostScript fonts. The CFF format, originating from PostScript, represents character outlines using Bezier curves and is known for its efficiency and compact size, especially for complex character sets. Therefore, OpenTypeCFF fonts combine the broad platform support and advanced typographic features of OpenType with the efficient outline representation of CFF. This makes them a popular choice for digital typography, offering a good balance of quality, file size, and compatibility. They can be distinguished from OpenType TrueType fonts, which use TrueType outlines. The underlying CFF data can be further compressed using various methods within the OpenType wrapper.