rendering issue for fonts with limited character sets

[Nick Aschenbach]

I ran into an issue when using a font I converted from DaFont (http://www.dafont.com/bold-pressing.font). The issue shows up when I try to use characters that don't exist with the typeface. In this case, the typeface does not contain any lower case characters. This is with version 0.15 of typeface.js. The converted font and code is attached to this report.

These code changes fixed the issue for me:

Replace line ~133:

return this.renderGlyph(ctx, face, this.fallbackCharacter, style);

with

return;

Reason: Got into infinite recursive loop

---

Add

line ~133:

if(!glyph) continue;

Reason: Glyph isn't defined

Thanks for your cool library. I enjoyed using it.