+ // Note that if we did error diffusion, we'd actually want to diffuse the
+ // premultiplied error. However, we need to do dithering in the same
+ // space as quantization, whether that be pre- or postmultiply.
+ virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+ virtual bool one_to_one_sampling() const { return true; }
+