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package ij.plugin;
import ij.*;
import ij.plugin.filter.*;
import ij.process.*;
import ij.gui.*;
import java.awt.*;
/** This plugin implements the Image/Adjust/Canvas Size command.
It changes the canvas size of an image or stack without resizing the image.
The border is filled with the current background color.
@author Jeffrey Kuhn (jkuhn at ccwf.cc.utexas.edu)
*/
public class CanvasResizer implements PlugIn {
boolean zeroFill = Prefs.get("resizer.zero", false);
public void run(String arg) {
int wOld, hOld, wNew, hNew;
boolean fIsStack = false;
ImagePlus imp = IJ.getImage();
wOld = imp.getWidth();
hOld = imp.getHeight();
ImageStack stackOld = imp.getStack();
if ((stackOld != null) && (stackOld.getSize() > 1))
fIsStack = true;
String[] sPositions = {
"Top-Left", "Top-Center", "Top-Right",
"Center-Left", "Center", "Center-Right",
"Bottom-Left", "Bottom-Center", "Bottom-Right"
};
String strTitle = fIsStack ? "Resize Stack Canvas" : "Resize Image Canvas";
GenericDialog gd = new GenericDialog(strTitle);
gd.addNumericField("Width:", wOld, 0, 5, "pixels");
gd.addNumericField("Height:", hOld, 0, 5, "pixels");
gd.addChoice("Position:", sPositions, sPositions[4]);
gd.addCheckbox("Zero Fill", zeroFill);
gd.showDialog();
if (gd.wasCanceled())
return;
wNew = (int)gd.getNextNumber();
hNew = (int)gd.getNextNumber();
int iPos = gd.getNextChoiceIndex();
zeroFill = gd.getNextBoolean();
Prefs.set("resizer.zero", zeroFill);
int xOff, yOff;
int xC = (wNew - wOld)/2; // offset for centered
int xR = (wNew - wOld); // offset for right
int yC = (hNew - hOld)/2; // offset for centered
int yB = (hNew - hOld); // offset for bottom
switch(iPos) {
case 0: // TL
xOff=0; yOff=0; break;
case 1: // TC
xOff=xC; yOff=0; break;
case 2: // TR
xOff=xR; yOff=0; break;
case 3: // CL
xOff=0; yOff=yC; break;
case 4: // C
xOff=xC; yOff=yC; break;
case 5: // CR
xOff=xR; yOff=yC; break;
case 6: // BL
xOff=0; yOff=yB; break;
case 7: // BC
xOff=xC; yOff=yB; break;
case 8: // BR
xOff=xR; yOff=yB; break;
default: // center
xOff=xC; yOff=yC; break;
}
if (fIsStack) {
ImageStack stackNew = expandStack(stackOld, wNew, hNew, xOff, yOff);
imp.setStack(null, stackNew);
} else {
if (!IJ.macroRunning())
Undo.setup(Undo.COMPOUND_FILTER, imp);
ImageProcessor newIP = expandImage(imp.getProcessor(), wNew, hNew, xOff, yOff);
imp.setProcessor(null, newIP);
if (!IJ.macroRunning())
Undo.setup(Undo.COMPOUND_FILTER_DONE, imp);
}
}
public ImageStack expandStack(ImageStack stackOld, int wNew, int hNew, int xOff, int yOff) {
int nFrames = stackOld.getSize();
ImageProcessor ipOld = stackOld.getProcessor(1);
java.awt.Color colorBack = Toolbar.getBackgroundColor();
ImageStack stackNew = new ImageStack(wNew, hNew, stackOld.getColorModel());
ImageProcessor ipNew;
for (int i=1; i<=nFrames; i++) {
IJ.showProgress((double)i/nFrames);
ipNew = ipOld.createProcessor(wNew, hNew);
if (zeroFill)
ipNew.setValue(0.0);
else
ipNew.setColor(colorBack);
ipNew.fill();
ipNew.insert(stackOld.getProcessor(i), xOff, yOff);
stackNew.addSlice(stackOld.getSliceLabel(i), ipNew);
}
return stackNew;
}
public ImageProcessor expandImage(ImageProcessor ipOld, int wNew, int hNew, int xOff, int yOff) {
ImageProcessor ipNew = ipOld.createProcessor(wNew, hNew);
if (zeroFill)
ipNew.setValue(0.0);
else
ipNew.setColor(Toolbar.getBackgroundColor());
ipNew.fill();
ipNew.insert(ipOld, xOff, yOff);
return ipNew;
}
}
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