Scales a BufferedImage using a theta that defines the scaling in both width and height. - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Scale

  1. HOME
  2. Java
  3. 2D Graphics
  4. BufferedImage Scale

Description

Scales a BufferedImage using a theta that defines the scaling in both width and height.

Demo Code

/*//from   ww w  .ja v  a 2  s.  c  o  m
 * @(#)ImageChangeUtil.java
 * 
 * Copyright 2013 MBARI
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
//package com.java2s;

import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;

public class Main {
    /**
     * Scales a <code>BufferedImage</code> using a theta that
     * defines the scaling in both width and height.
     *
     *
     * @param image BufferedImage
     * @param theta scaling factor. Must be between 0-1.0
     *
     * @return a scaled version of the original {@code BufferedImage}.
     * Throws exception if {@link java.awt.image.AffineTransformOp AffineTransformOp} fails to scale.
     */
    public static BufferedImage scale(BufferedImage image, float theta)
            throws Exception {

        // //System.out.println("theta: " + t);
        try {
            BufferedImage newimage = image;
            AffineTransform at = AffineTransform.getScaleInstance(
                    (double) theta, (double) theta);
            AffineTransformOp op = new AffineTransformOp(at, null);

            return op.filter(newimage, null);
        } catch (Exception ex) {
            System.err.println(ex.toString());
            ex.printStackTrace();

            // Fail safe because this randomly blew up once in Linux.
            // Might not be a real problem, but what the heck!
            return image;
        }
    }
}

Related Tutorials