I would like to start thinking of what a 1.0 version should be like, what's missing and what planned features belong to a later 2.0 version.

The 1.0 version should be about selecting a set of key features and getting them to a point where:

• Their API is polished and stable (-ish)
• These features are fully implemented. For example some tessellators are currently missing or partially implemented (don't generate normals).

Lyon 1.0 features

Tessellators that work on flattened paths

• FillTessellator.
  • even-odd fill rule
  • robust (fuzzed)
  • generate vertex normals
• StrokeTessellator
  • butt line caps
  • square line caps
  • round line caps
  • miter line joins
  • miter clip line joins
  • round line joins
  • bevel line joins
• stroke-to-fill conversion
• variable stroke width