Archive for January, 2014

Introducing & Building OpenType Collections (OTCs)

I would like to use this opportunity to introduce two new things.

First, OpenType Collections. TrueType Collections have been around for many years, and are commonplace for OS-bundled fonts. What I am speaking of are ‘sfnt’ Collections that include a ‘CFF ‘ (PostScript charstrings) table rather than a ‘glyf‘ (TrueType charstrings) one. The advantage of an ‘sfnt’ Collection is that fonts that differ in minor ways can be combined into a single resource, which can provide substantial size savings.

Second, brand new AFDKO tools, in the form of two Python scripts, for building, breaking apart, and displaying a synopsis of an OTC’s tables. These scripts were developed by our incredibly talented font tools engineer, Read Roberts, so all thanks should go to him for preparing them.
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GB 18030 Oddity or Design Flaw?

I spent a couple of days curling up with GB 18030 (both versions: 2000 and 2005), which is PRC’s latest and greatest national character set standard, and came across an oddity that my gut tells me is a design flaw. At the very least, it is an issue about which font developers need to be aware.

What I found were eight instances of CJK Unified Ideographs with a left-side Radical #130 that uses the Traditional Chinese or Taiwan-style form, instead of the expected Simplified Chinese or PRC-style form that looks the same as Radical #74. Screen captures from the latest Unicode Code Charts, whose glyphs agree with both versions of GB 18030, are shown below:

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