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/*
Copyright 2006 Jerry Huxtable
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.jhlabs.image;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
/**
* A filter to add a border around an image using the supplied Paint, which may be null for no painting.
*/
public class BorderFilter extends AbstractBufferedImageOp {
private int leftBorder, rightBorder;
private int topBorder, bottomBorder;
private Paint borderPaint;
public BorderFilter() {
}
public BorderFilter( int leftBorder, int topBorder, int rightBorder, int bottomBorder, Paint borderPaint ) {
this.leftBorder = leftBorder;
this.topBorder = topBorder;
this.rightBorder = rightBorder;
this.bottomBorder = bottomBorder;
this.borderPaint = borderPaint;
}
public void setLeftBorder(int leftBorder) {
this.leftBorder = leftBorder;
}
public int getLeftBorder() {
return leftBorder;
}
public void setRightBorder(int rightBorder) {
this.rightBorder = rightBorder;
}
public int getRightBorder() {
return rightBorder;
}
public void setTopBorder(int topBorder) {
this.topBorder = topBorder;
}
public int getTopBorder() {
return topBorder;
}
public void setBottomBorder(int bottomBorder) {
this.bottomBorder = bottomBorder;
}
public int getBottomBorder() {
return bottomBorder;
}
public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
int width = src.getWidth();
int height = src.getHeight();
if ( dst == null )
dst = new BufferedImage( width+leftBorder+rightBorder, height+topBorder+bottomBorder, src.getType() );
Graphics2D g = dst.createGraphics();
if ( borderPaint != null ) {
g.setPaint( borderPaint );
if ( leftBorder > 0 )
g.fillRect( 0, 0, leftBorder, height );
if ( rightBorder > 0 )
g.fillRect( width-rightBorder, 0, rightBorder, height );
if ( topBorder > 0 )
g.fillRect( leftBorder, 0, width-leftBorder-rightBorder, topBorder );
if ( bottomBorder > 0 )
g.fillRect( leftBorder, height-bottomBorder, width-leftBorder-rightBorder, bottomBorder );
}
g.drawRenderedImage( src, AffineTransform.getTranslateInstance( leftBorder, rightBorder ) );
g.dispose();
return dst;
}
public String toString() {
return "Distort/Border...";
}
}
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