virtual bool needs_srgb_primaries() const { return false; }
virtual unsigned num_inputs() const { return 2; }
+ virtual bool one_to_one_sampling() const { return true; }
// TODO: In the common case where a+b=1, it would be useful to be able to set
// alpha_handling() to INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK. However, right now