Example usage for java.awt.image BufferedImageOp filter

Introduction

In this page you can find the example usage for java.awt.image BufferedImageOp filter.

Prototype

public BufferedImage filter(BufferedImage src, BufferedImage dest);

Source Link

Document

Performs a single-input/single-output operation on a BufferedImage .

Usage

From source file:ucar.unidata.idv.ui.ImageGenerator.java

/**
 * Scale the given {@code source} {@link Image}.
 *
 * @param source Source image./*from ww  w  . jav  a2  s .c  om*/
 * @param width New width.
 * @param height New height.
 *
 * @return Scaled {@code source} image (uses bilinear interpolation).
 */
public static BufferedImage getScaledImage(Image source, int width, int height) {
    // convert the given Image into a BufferedImage if needed--makes things a
    // little easier.
    BufferedImage image;
    if (source instanceof BufferedImage) {
        image = (BufferedImage) source;
    } else {
        image = new BufferedImage(source.getWidth(null), source.getHeight(null), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = image.createGraphics();
        g.drawImage(source, 0, 0, null);
        g.dispose();
    }

    int imageWidth = image.getWidth();
    int imageHeight = image.getHeight();
    double scaleX = (double) width / imageWidth;
    double scaleY = (double) height / imageHeight;
    AffineTransform scaleTransform = AffineTransform.getScaleInstance(scaleX, scaleY);
    BufferedImageOp op = new AffineTransformOp(scaleTransform, AffineTransformOp.TYPE_BILINEAR);
    return op.filter(image, new BufferedImage(width, height, image.getType()));
}