/*
* ImageUtils.java
*
* Copyright (c) 2008, Ralf Biedert, DFKI. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of the author nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package de.dfki.km.text20.util;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
/**
* @author rb
*
*/
public class ImageUtils {
/**
* Code shamelessly stolen from the net.
*
* @param image
* @param scale
* @return .
*/
public static BufferedImage getScaledImage(final Image image, final double scale) {
final int w = (int) (scale * image.getWidth(null));
final int h = (int) (scale * image.getHeight(null));
final int type = BufferedImage.TYPE_INT_RGB;
final BufferedImage out = new BufferedImage(w, h, type);
final Graphics2D g2 = out.createGraphics();
final AffineTransform at = AffineTransform.getScaleInstance(scale, scale);
g2.drawImage(image, at, null);
g2.dispose();
return out;
}
/**
* @param image
* @param width
* @return .
*/
public static BufferedImage getScaledImage(final Image image, final int width) {
final float scale = (float) width / image.getWidth(null);
return getScaledImage(image, scale);
}
/**
* @param image
* @return .
*/
public static boolean isBlack(final BufferedImage image) {
final WritableRaster raster = image.getRaster();
final int w = raster.getWidth();
final int h = raster.getHeight();
final double d[] = new double[4];
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
raster.getPixel(x, y, d);
final double q = d[0] + d[1] + d[2];
if (q > 0) return false;
}
}
return true;
}
}