Better support for unscaled glyphs (fixes #45)
Created by: fschutt
This commit should fix issues I had with reading the raw metrics from a font (for PDF purposes, you have to deal with unscaled fonts). There was previously no way to:
- Get the raw width of a glyph in unscaled units
- Get the ascender / descender of an unscaled font
This is needed because in PDF, fonts are scaled when text is written, not when the font is embedded. So I need access to the raw metrics.
The documentation is simply what I could derive from the naming, not sure if absolutely correct.
This would close https://github.com/dylanede/rusttype/issues/45