Function trySourceOver

Composite source over destination without implicit association changes.

imagery.compositing.source_over.SourceOverError trySourceOver(
  imagery.compositing.source_over.RgbaNormalized source,
  imagery.compositing.source_over.RgbaNormalized destination,
  imagery.compositing.source_over.AlphaAssociation association,
  out imagery.compositing.source_over.RgbaNormalized result
) pure nothrow @nogc @safe;