This is a quick tool to resolve naming, styling and mapping issues among OpenType fonts. Without any options given, it scans and maintains the metedata consistency among font tables; with a simple but powerful configuration file, all intricate data fields between font tables such as name, head, OS/2 can be automatically generated without compromising platform-specific compatibility. It also supplies extra useful functionalities to simplify multilingual OpenType font packaging workflow.

TrueType and OpenType fonts are both supported. Output files are always created with different names, so an existing file is never overwritten.

otrebuild [options] <inputFont>

-o <outputFont>: Specify the output font file.

-c <configTOML>: Specify the configuration file. It is an TOML-format text file and it must be UTF-8 encoded.

--UPM <targetUPM>: Change a TrueType font's units-per-em value. The entire font will be rescaled to adapt the new UPM value. A typical UPM for TrueType font is 2048, and for CFF-based font is 1000. UPM > 5000 will cause problems in Adobe apps such as InDesign and Illustrator. MATH table is currently not supported; please rebuild it after application.

--otf2ttf: For CFF-based font only. Convert a CFF-based font into a TrueType-outline font. Glyph bounding boxes and min/max values will be automatically recalculated. This option would be ignored if a TrueType font is specified.

--macOffice: Add standard weight strings onto Mac English subfamily and remove legacy Macintosh Roman character mapping in order to obtain maximum compatibilities with Microsoft Office 2011 for Mac. ONLY enable this option when one or more subfamilies are missing from Mac Office 2011's font menu or characters outside Mac Roman are unavailable on Mac Office 2011. DO NOT USE for later Mac Office versions nor Windows Office releases.

--refresh: Re-compile all font tables.

--recalculate: Recalculate glyph bounding boxes, min/max values and Unicode ranges.

--removeGlyphNames: Remove all glyph names for release.

--removeBitmap: For TrueType fonts only. Remove bitmap data. It would be ignored if CFF-based font is specified.

--removeHinting: For TrueType fonts only. Remove hinting/gridfit data. This is designed for ill-hinted fonts. Use it with caution when processing professional gridfitted fonts. It would be ignored if CFF-based font is specified.

--smoothRendering: For TrueType fonts only. Smooth screen rendering on Windows 10 RTM or later without removing hinting/gridfit information. It would be ignored if CFF-based font is specified.

--rebuildMapping: Regenerate character mappings of the font.

--allowUpgrade: Allow upgrading OS/2 table when advanced features are specified in the given configuration file.

--dummySignature: Some apps such as Microsoft Office require a valid digital signature in order to enable advanced OpenType features. This option can forge an empty but valid DSIG placeholder.

--O1: Mild optimization, as a shortcut to --smoothRendering, --allowUpgrade, and --dummySignature.

--O2: Typical optimization, as a shortcut to --recalculate, --smoothRendering, --rebuildMapping, --allowUpgrade, and --dummySignature.

--O3: Comprehensive optimization for release, as a shortcut to --refresh, --recalculate, --removeBitmap, --removeHinting, --rebuildMapping, --allowUpgrade, and --dummySignature.

** Windows legacy symbol fonts are currently not supported.

** Variable fonts are currently not supported.