rasterize abstract method
Rasterizes request to a SnapshotRaster, asynchronously.
Runs in the pre-resolve pass before the frame loop. Throws a
FluvieSnapshotUnavailableError when the backing capability is missing,
and a FluvieRenderException when a present backend fails on the input.
Implementation
Future<SnapshotRaster> rasterize(SnapshotRequest request);