Given a font opentype.js should be able to output glyphs with a different weight or italicization from the original font.

Expected Behavior

Given a font we should be able to generate glyphs with a different weight or italicization similar to how libfreetype does.

Current Behavior

We don't do this.

Possible Solution

We should look at how libfreetype does this.

Context

I need this functionality for my library that depends on opentype.js.