crop BufferedImage To Height - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Crop

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Description

crop BufferedImage To Height

Demo Code


import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Polygon;
import java.awt.RadialGradientPaint;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.Area;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import org.apache.log4j.Logger;

public class Main{
    public static BufferedImage cropToHeight(BufferedImage in, int maxHeight) {
        if (in.getHeight() <= maxHeight)
            return in;
        BufferedImage result = new BufferedImage(in.getWidth(), maxHeight,
                BufferedImage.TYPE_INT_ARGB);
        Graphics2D gr = result.createGraphics();

        int cropTotal = in.getHeight() - maxHeight;
        int sourceY1 = cropTotal >> 1;
        int sourceY2 = in.getHeight() - cropTotal + sourceY1;

        gr.drawImage(in, 0, 0, result.getWidth(), result.getHeight(),
                0 /*sx1*/, sourceY1 /*sy1*/, in.getWidth() /* sx2 */,
                sourceY2 /* sy2 */, null);

        return result;
    }/*from  w  ww. j a  v a  2  s.co  m*/
}

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