kTypeFloydSteinberg
DitherType dither_type = kTypeFloydSteinberg);
Halftone halftone(B_RGB32, 0.25f, 0.0f, Halftone::kTypeFloydSteinberg);
if (ditherType == kTypeFloydSteinberg) {
fDitherType = Halftone::kTypeFloydSteinberg;
label, Halftone::kTypeFloydSteinberg);
Halftone::kTypeFloydSteinberg);