Class LutLoader

ij/src/main/java/ij/plugin/LutLoader.java:19–463

Opens NIH Image look-up tables (LUTs), 768 byte binary LUTs (256 reds, 256 greens and 256 blues), LUTs in text format, or generates the LUT specified by the string argument passed to the run() method.

	or generates the LUT specified by the string argument 
	passed to the run() method. */
public class LutLoader extends ImagePlus implements PlugIn {

	private static String defaultDirectory = null;
	private boolean suppressErrors;
	
	/** Returns the LUT 'name' as an IndexColorModel, where
	 * 'name' can be any entry in the Image/Lookup Tables menu.
	 * @see ij.IJ#getLuts
	 * See: Help>Examples>JavaScript/Show all LUTs
	*/
	public static IndexColorModel getLut(String name) {
		if (name==null) return null;
		LutLoader ll = new LutLoader();
		FileInfo fi = ll.getBuiltInLut(name.toLowerCase());
		if (fi.fileName!=null)
			return new IndexColorModel(8, 256, fi.reds, fi.greens, fi.blues);
		String path = IJ.getDir("luts")+name+".lut";
		IndexColorModel lut = LutLoader.openLut("noerror:"+path);
		if (lut==null) {
			path = IJ.getDir("luts")+name.replaceAll(" ","_")+".lut";
			lut = LutLoader.openLut("noerror:"+path);
		}
		return lut;
	}

	/** If 'arg'="", displays a file open dialog and opens the specified
		LUT. If 'arg' is a path, opens the LUT specified by the path. If
		'arg'="fire", "ice", etc., uses a method to generate the LUT. */
	public void run(String arg) {
		if (arg.equals("invert")) {
			invertLut();
			return;
		}
		
		// Built in LUT
		FileInfo fi = getBuiltInLut(arg);
		if (fi.fileName!=null) {
			showLut(fi, true);
			Menus.updateMenus();			
			return;
		}
		
		// LUT in luts folder
		OpenDialog od = new OpenDialog("Open LUT...", arg);
		fi.directory = od.getDirectory();
		fi.fileName = od.getFileName();
		if (fi.fileName==null)
				return;
		if (openLut(fi))
			showLut(fi, arg.equals(""));
		IJ.showStatus("");
	}
	
	private FileInfo getBuiltInLut(String name) {
		FileInfo fi = new FileInfo();
		fi.reds = new byte[256]; 
		fi.greens = new byte[256]; 
		fi.blues = new byte[256];