package com.twelvemonkeys.servlet.image.aoi;
import java.awt.*;
/**
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
* @author <a href="mailto:erlend@hamnaberg.net">Erlend Hamnaberg</a>
* @version $Revision: $
*/
public class DefaultAreaOfInterest implements AreaOfInterest {
private final int mOriginalWidth;
private final int mOriginalHeight;
public DefaultAreaOfInterest(int pOriginalWidth, int pOriginalHeight) {
this.mOriginalWidth = pOriginalWidth;
this.mOriginalHeight = pOriginalHeight;
}
public DefaultAreaOfInterest(Dimension pOriginalDimension) {
this(pOriginalDimension.width, pOriginalDimension.height);
}
Rectangle getAOI(final int pX, final int pY, final int pWidth, final int pHeight) {
return getAOI(new Rectangle(pX, pY, pWidth, pHeight));
}
public Rectangle getAOI(final Rectangle pCrop) {
int y = pCrop.y;
int x = pCrop.x;
Dimension dimension = getOriginalDimension();
Dimension crop = getCrop(dimension, pCrop);
// Center
if (y < 0) {
y = calculateY(dimension, new Rectangle(x, y, crop.width, crop.height));
}
if (x < 0) {
x = calculateX(dimension, new Rectangle(x, y, crop.width, crop.height));
}
return new Rectangle(x, y, crop.width, crop.height);
}
public Dimension getOriginalDimension() {
return new Dimension(mOriginalWidth, mOriginalHeight);
}
public int calculateX(Dimension pOriginalDimension, Rectangle pCrop) {
return (pOriginalDimension.width - pCrop.width) / 2;
}
public int calculateY(Dimension pOriginalDimension, Rectangle pCrop) {
return (pOriginalDimension.height - pCrop.height) / 2;
}
public Dimension getCrop(Dimension pOriginalDimension, final Rectangle pCrop) {
int mOriginalWidth1 = pOriginalDimension.width;
int mOriginalHeight1 = pOriginalDimension.height;
int x = pCrop.x;
int y = pCrop.y;
int cropWidth = pCrop.width;
int cropHeight = pCrop.height;
if (cropWidth < 0 || (x < 0 && cropWidth > mOriginalWidth1)
|| (x >= 0 && (x + cropWidth) > mOriginalWidth1)) {
cropWidth = (x >= 0 ? mOriginalWidth1 - x : mOriginalWidth1);
}
if (cropHeight < 0 || (y < 0 && cropHeight > mOriginalHeight1)
|| (y >= 0 && (y + cropHeight) > mOriginalHeight1)) {
cropHeight = (y >= 0 ? mOriginalHeight1 - y : mOriginalHeight1);
}
return new Dimension(cropWidth, cropHeight);
}
}