Version ab_glyph 0.1

Add rusttype comparison to readme.
Update root readme.

README.md

@@ -1,8 +1,8 @@
-# ab-glyph
-Glyph stuff.
+## [ab_glyph](glyph) [![crates.io](https://img.shields.io/crates/v/ab_glyph.svg)](https://crates.io/crates/ab_glyph) [![Documentation](https://docs.rs/ab_glyph/badge.svg)](https://docs.rs/ab_glyph)
+Fast API for loading, scaling, positioning and rasterizing OpenType font glyphs. [See readme](glyph).
 
 ## [ab_glyph_rasterizer](rasterizer) [![](https://img.shields.io/crates/v/ab_glyph_rasterizer.svg)](https://crates.io/crates/ab_glyph_rasterizer) [![](https://docs.rs/ab_glyph_rasterizer/badge.svg)](https://docs.rs/ab_glyph_rasterizer)
-Zero dependency coverage rasterization for lines, quadratic & cubic beziers.
+Zero dependency coverage rasterization for lines, quadratic & cubic beziers.  [See readme](rasterizer).
 
 ## Minimum supported rust compiler
 All crates maintained with [latest stable rust](https://gist.github.com/alexheretic/d1e98d8433b602e57f5d0a9637927e0c).

glyph/CHANGELOG.md

@@ -1,2 +1,2 @@
-# Unreleased
+# 0.1
 * Implement fast glyph layout, outline & drawing primitives.

glyph/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ab_glyph"
-version = "0.0.0"
+version = "0.1.0"
 authors = ["Alex Butler <alexheretic@gmail.com>"]
 edition = "2018"
 description = "API for loading, scaling, positioning and rasterizing OpenType font glyphs."

glyph/README.md

@@ -23,3 +23,20 @@ no_std environments are supported using `alloc` & [`libm`](https://github.com/ru
 ```toml
 ab_glyph = { default-features = false, features = ["libm-math"] }
 ```
+
+## Comparison with [`rusttype`](https://gitlab.redox-os.org/redox-os/rusttype)
+ab_glyph is a rewrite of rusttype made after I added .otf support for the latter and saw some performance issue's
+with the rusttype API.
+
+ab_glyph is a more focussed API concentrating on high performance for both .ttf & .otf fonts.
+
+When laying out glyphs into paragraph, ab_glyph is faster than rusttype using .ttf fonts &
+**much** faster for .otf fonts.
+
+```
+group                               ab-glyph                    rusttype 0.9
+-----                               --------                    ------------
+layout_a_sentence                   1.00     19.3±0.14µs        1.31     25.3±0.35µs
+layout_a_sentence (exo2-otf)        1.00     11.1±0.12µs        8.85     98.1±1.17µs
+layout_a_sentence (exo2-ttf)        1.00     11.1±0.08µs        1.56     17.3±0.14µs
+```