Method setupLuts

ij/src/main/java/ij/CompositeImage.java:150–178

(int channels)

	}

	void setupLuts(int channels) {
		if (ip==null)
			return;
		if (lut==null || lut.length<channels) {
			if (displayRanges!=null && channels!=displayRanges.length/2)
				displayRanges = null;
			if (displayRanges==null&&ip.getMin()==0.0&&ip.getMax()==0.0)
				ip.resetMinAndMax();
			lut = new LUT[channels];
			LUT lut2 = channels>MAX_CHANNELS?createLutFromColor(Color.white):null;
			for (int i=0; i<channels; ++i) {
				if (channelLuts!=null && i<channelLuts.length) {
					lut[i] = createLutFromBytes(channelLuts[i]);
					customLuts = true;
				} else if (i<MAX_CHANNELS)
					lut[i] = createLutFromColor(colors[i]);
				else
					lut[i] = (LUT)lut2.clone();
				if (displayRanges!=null) {
					lut[i].min = displayRanges[i*2];
					lut[i].max = displayRanges[i*2+1];
				} else {
					lut[i].min = ip.getMin();
					lut[i].max = ip.getMax();
				}
			}
			displayRanges = null;
		}
	}
	
	public void resetDisplayRanges() {
		int channels = getNChannels();