SignWriting 2010: TrueType fonts with SVG clarity

Stephen E Slevinski Jr slevin at SIGNPUDDLE.NET
Tue Oct 7 17:55:39 UTC 2014

Hi List,

I have several prototype TrueType fonts.  About 10% or more have 
moderate to severe quality issues.  With a 16-bit font of 37,811 glyphs, 
that is a lot of cleanup to do manually.

The first image is the SVG Refinement.  The second is the prototype 
TrueType Font.

Rather than fixing thousands of symbols by hand, I created an automated 
solution by increasing the image size and retracing the SVG.  My new 
import has the proper shape and thickness for all symbols.

The first image is the original PNG.   The second is the SVG 
Refinement.  The third is my new TrueType font.

The automated process should take a few days.  I'm hoping my iMac can 
handle the processing demands.  I have everything configured, tested, 
and ready to automate.

Step 1: Use Inkscape to convert the SVG Refinement graphics into PNG 
images at 10 times normal size.

Step 2: Use pnttopnm and mkbitmap to reformat the images into different 
file types.

Step 3: Use potrace to read the PBM files and recreate the SVG

I need to create and package about a half a million files.  It should 
take me a few days to run the automated scripts.

Last time I traced the ISWA 2010, my Linux computer had memory leaks and 
could only process a few thousand at a time before crashing.  I couldn't 
resolve the crashing issue, so I just kept restarting my computer.  This 
time, I hope my iMac is up to the job.




Valerie Sutton
SignWriting List moderator
sutton at

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