Comment by jansan

1 year ago

Should be no problem. GSUB lookup type 4.1* uses a uint16 to store the number of ligatures, so 65000 ligatures should be feasible. To store the actual glyphs, 32bit offsets are used, so you theoretically have a 2GByte of memory available, which should be plenty (although I have never seen a font larger than 15MB).

Using Wasm for this animation really is an overkill IMHO.

*) https://learn.microsoft.com/en-us/typography/opentype/spec/g...

Edit: IIRC Ligatures are applied recursively, so you can have a ligature based on other ligatures. If I am right here, each ligature can consist only of two glyphs (the glyph of the previous animation frame followed by a dot). This would keep the GSUB table small.

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jansan

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erk__  1 year ago

I used wasm because bad apple was the first thing I thought of when I saw the update that added wasm. I have thought about doing something where wasm fits better, but I have not gotten around to that yet.