HalftoneView
class HalftoneView : public BView
HalftoneView(BRect frame, const char* name, uint32 resizeMask,
HalftoneView* fHalftone;
class HalftoneView;
HalftoneView::HalftoneView(BRect frame, const char* name, uint32 resizeMask,
HalftoneView::Preview(float gamma, float min,
fHalftone = new HalftoneView(rect, "halftone",