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package ij.plugin.filter;
import ij.*;
import ij.gui.*;
import ij.process.*;
import java.awt.*;
/** Implements the commands in the Process/Shadows submenu. */
public class Shadows implements PlugInFilter {
String arg;
ImagePlus imp;
public int setup(String arg, ImagePlus imp) {
this.arg = arg;
this.imp = imp;
if (imp!=null && imp.getStackSize()>1 && arg.equals("demo"))
{IJ.error("This demo does not work with stacks."); return DONE;}
return IJ.setupDialog(imp, DOES_ALL+SUPPORTS_MASKING);
}
public void run(ImageProcessor ip) {
if (arg.equals("demo")) {
IJ.resetEscape();
while (!IJ.escapePressed()) {
north(ip); imp.updateAndDraw(); ip.reset();
northeast(ip); imp.updateAndDraw(); ip.reset();
east(ip); imp.updateAndDraw(); ip.reset();
southeast(ip); imp.updateAndDraw(); ip.reset();
south(ip); imp.updateAndDraw(); ip.reset();
southwest(ip); imp.updateAndDraw(); ip.reset();
west(ip); imp.updateAndDraw(); ip.reset();
northwest(ip); imp.updateAndDraw(); ip.reset();
}
}
else if (arg.equals("north")) north(ip);
else if (arg.equals("northeast")) northeast(ip);
else if (arg.equals("east")) east(ip);
else if (arg.equals("southeast")) southeast(ip);
else if (arg.equals("south")) south(ip);
else if (arg.equals("southwest")) southwest(ip);
else if (arg.equals("west")) west(ip);
else if (arg.equals("northwest")) northwest(ip);
}
public void north(ImageProcessor ip) {
int[] kernel = {1,2,1, 0,1,0, -1,-2,-1};
ip.convolve3x3(kernel);
}
public void south(ImageProcessor ip) {
int[] kernel = {-1,-2,-1, 0,1,0, 1,2,1};
ip.convolve3x3(kernel);
}
public void east(ImageProcessor ip) {
int[] kernel = {-1,0,1, -2,1,2, -1,0,1};
ip.convolve3x3(kernel);
}
public void west(ImageProcessor ip) {
int[] kernel = {1,0,-1, 2,1,-2, 1,0,-1};
ip.convolve3x3(kernel);
}
public void northwest(ImageProcessor ip) {
int[] kernel = {2,1,0, 1,1,-1, 0,-1,-2};
ip.convolve3x3(kernel);
}
public void southeast(ImageProcessor ip) {
int[] kernel = {-2,-1,0, -1,1,1, 0,1,2};
ip.convolve3x3(kernel);
}
public void northeast(ImageProcessor ip) {
int[] kernel = {0,1,2, -1,1,1, -2,-1,0};
ip.convolve3x3(kernel);
}
public void southwest(ImageProcessor ip) {
int[] kernel = {0,-1,-2, 1,1,-1, 2,1,0};
ip.convolve3x3(kernel);
}
}
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