1 /** 2 * This file Copyright (c) 2013-2018 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.ui.mediaeditor.action; 35 36 import info.magnolia.event.EventBus; 37 import info.magnolia.ui.ValueContext; 38 import info.magnolia.ui.mediaeditor.MediaEditorEventBus; 39 import info.magnolia.ui.mediaeditor.action.definition.GrayScaleActionDefinition; 40 import info.magnolia.ui.mediaeditor.data.MediaState; 41 42 import java.awt.image.BufferedImage; 43 import java.io.IOException; 44 import java.io.InputStream; 45 46 import javax.imageio.ImageIO; 47 import javax.inject.Named; 48 49 import com.jhlabs.image.GrayscaleFilter; 50 51 /** 52 * Converts image color scheme to gray scale. 53 */ 54 public class ConvertImageToGrayScaleAction extends InstantMediaEditorAction { 55 56 public ConvertImageToGrayScaleAction(GrayScaleActionDefinition definition, 57 ValueContext<MediaState> valueContext, 58 @Named(MediaEditorEventBus.NAME) EventBus eventBus) { 59 super(definition, valueContext, eventBus); 60 } 61 62 @Override 63 protected InputStream performModification(InputStream stream) throws IOException { 64 final BufferedImage img = ImageIO.read(stream); 65 return createStreamSource(new GrayscaleFilter().filter(img, null), DEFAULT_FORMAT); 66 } 67 }