jvantuyl / font_metrics

Work with graphical font metrics and strings. Intended for use with, but doesn't require, Scenic

FontMetrics

Update

Version 0.5 has several major chagnes, including wrapping at word boudaries and, frankly, fixes a bug when calculating the widths.

It also removes serialization and now just returns the struct. This library shouldn't have an opinion on how you want to serialize it's data. I suggest you use something like :erlang.term_to_binary to get it done. Scenic no longer needs this functionality and that really pointed out how it shouldn't be here.

Overview

This library works with pre-generated font metrics data to explore and calculate various measurements of text in a given font and size.

For example, if you want to know how wide or tall a string of text will be when it is rendered in a given font at a given size, then this can help you out.

This library is intended to be used with the Scenic framework, but doesn't depend on it, so it is usable elsewhere.

Installation

If available in Hex, the package can be installed by adding font_metrics to your list of dependencies in mix.exs:

def deps do
  [
    {:font_metrics, "~> 0.5"}
  ]
end

Generating Metrics

You will need to use another package to compile the font metrics data from a font.

This can be done with the truetype_metrics package. Look for it on hex... In the meantime, metrics data for both Roboto and RobotoMono can be found in the Scenic project.