Patent attributes
A missing glyph replacement system is described. In an example, a Unicode identifier of a missing glyph is obtained and glyph metadata describing a glyph cluster that includes the Unicode identifier is obtained from a cache maintained in the storage device, e.g., as part of preprocessing. From this, the system obtains glyphs from the font using Unicode identifiers included in the glyph cluster. The system uses a representative glyph from these glyphs to verify the glyph cluster, and if verified obtains glyphs based on the cluster. For these obtained glyphs, an amount of similarity is determined for the missing glyph with respect to the plurality of obtained glyphs, e.g., to control output of representations of the obtained glyphs in the user interface. The representations are user selectable via the user interface to replace the missing glyph.