Feature-gated, backend-specific functionality.
Conrod can be thought of as a pipe, where its inputs are
conrod::event::Raws and its output
conrod::render::Primitives. The following feature-gated backend modules provide helper
functionality for converting events and rendering primitives in a way that is suitable to each.
If there is a popular backend that you would like to see support for that is currently missing from this module, feel free to open an issue or pull request at the conrod repository.