001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.runtime.img;
020
021import java.awt.Color;
022import java.awt.Font;
023import java.awt.image.BufferedImage;
024
025import lucee.commons.img.AbstractCaptcha;
026import lucee.commons.img.CaptchaException;
027import lucee.commons.lang.font.FontUtil;
028import lucee.runtime.exp.ExpressionException;
029import lucee.runtime.img.filter.MarbleFilter;
030
031public class MarpleCaptcha extends AbstractCaptcha {
032
033        public static final int DIFFICULTY_LOW=0;
034        public static final int DIFFICULTY_MEDIUM=1;
035        public static final int DIFFICULTY_HIGH=2;
036
037        public BufferedImage generate(String text,int width, int height, String[] fonts, boolean useAntiAlias, Color fontColor,int fontSize, int difficulty) throws CaptchaException {
038                MarbleFilter mf = new MarbleFilter();
039                try {
040                        mf.setEdgeAction("WRAP");
041                } catch (ExpressionException e1) {}
042                mf.setAmount(0.1F);
043                BufferedImage src=super.generate(text, width, height, fonts, useAntiAlias, fontColor, fontSize, difficulty);
044                
045                if(difficulty==DIFFICULTY_LOW) mf.setTurbulence(0.0f);
046                else if(difficulty==DIFFICULTY_MEDIUM) mf.setTurbulence(0.10f);
047                else mf.setTurbulence(0.2f);
048                
049                try {
050                        mf.setInterpolation("NEAREST_NEIGHBOUR");
051                } catch (ExpressionException e) {}
052                
053                BufferedImage dst = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
054                mf.filter(src, dst);
055                return dst;
056        }
057        
058        public Font getFont(String font, Font defaultValue) {
059                return FontUtil.getFont(font,defaultValue);
060        }
061}