Summary of Requirements and Recommendations
Far East font vendors should ensure that their TrueType fonts provide the following features wherever possible:
- Unicode encoding in 'cmap' and 'name'
- Character set identification flags in 'OS/2'
- Vertical metrics in 'vhea' and 'vmtx'
- Vertical glyph substitution in 'GSUB'
- Close adherence to TrueType specifications
Vendors may also choose to add many optional features to their TrueType fonts. This document contains guidelines for supporting the following features:
- Embedded bitmaps
- TrueType Collections
- Gray scale rendering (font smoothing)
- Baseline positioning information