Out of memory error trying to convert Arial Unicode MS

[ChrisLoer]

How to reproduce

I ran into this trying to make a font stack with Arial Unicode MS as a fallback using the demo site (https://maplibre.org/font-maker/). The error in the console is:

sdfglyph.js:1646 Cannot enlarge memory arrays to size 28626944 bytes (OOM). Either (1) compile with  -s INITIAL_MEMORY=X  with X higher than the current value 16777216, (2) compile with  -s ALLOW_MEMORY_GROWTH=1  which allows increasing the size at runtime, or (3) if you want malloc to return NULL (0) instead of this abort, compile with  -s ABORTING_MALLOC=0 

I think just adding -s ALLOW_MEMORY_GROWTH=1 to build_wasm.sh should be an easy fix.

I ended up just running font-maker from the command line to make the font stack, which seems to have worked without a hitch.

Awesome tool, by the way! It made me very happy to find this.

Attachments

• Include the font file (.ttf or .otf) you are trying to convert.

Arial Unicode.ttf.zip

[bdon]

Added that line in #15. Thanks for testing!

It does get rid of the error with the Arial Unicode font but the WASM version is really slow compared to the command line (which still takes a long time rendering most of the BMP with one thread).

This is related to some potential tasks that came up in maplibre/maplibre#154 for building a reproducible fallback based on Noto. I'll open a separate issue for that.

[bdon]

#16

[ChrisLoer]

Thank you!