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.functions.image;
020
021import java.awt.RenderingHints;
022
023import javax.media.jai.operator.ShearDescriptor;
024import javax.media.jai.operator.ShearDir;
025
026import lucee.runtime.PageContext;
027import lucee.runtime.exp.FunctionException;
028import lucee.runtime.exp.PageException;
029import lucee.runtime.img.Image;
030
031public class ImageShear {
032        public static String call(PageContext pc, Object name, double shear) throws PageException {
033                return call(pc, name, shear, "horizontal", "nearest");
034        }
035        
036        public static String call(PageContext pc, Object name, double shear, String direction) throws PageException {
037                return call(pc, name, shear, direction,"nearest");
038        }
039        
040        public static String call(PageContext pc, Object name, double shear, String strDirection, String strInterpolation) throws PageException {
041                //if(name instanceof String) name=pc.getVariable(Caster.toString(name));
042                Image img = Image.toImage(pc,name);
043                
044                // direction
045                strDirection=strDirection.toLowerCase().trim();
046                ShearDir direction;
047                if("horizontal".equals(strDirection))                   direction = ShearDescriptor.SHEAR_HORIZONTAL;
048                else if("vertical".equals(strDirection))                direction = ShearDescriptor.SHEAR_VERTICAL;
049                else throw new FunctionException(pc,"ImageShear",3,"direction","invalid direction definition ["+strDirection+"], " +
050                        "valid direction values are [horizontal,vertical]");
051
052                // interpolation
053                strInterpolation=strInterpolation.toLowerCase().trim();
054                Object interpolation = RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
055                if("nearest".equals(strInterpolation))                  interpolation = RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR;
056                else if("bilinear".equals(strInterpolation))    interpolation = RenderingHints.VALUE_INTERPOLATION_BILINEAR;
057                else if("bicubic".equals(strInterpolation))     interpolation = RenderingHints.VALUE_INTERPOLATION_BICUBIC;
058                else throw new FunctionException(pc,"ImageTranslate",4,"interpolation","invalid interpolation definition ["+strInterpolation+"], " +
059                                "valid interpolation values are [nearest,bilinear,bicubic]");
060                
061                img.shear((float)shear, direction, interpolation);
062                return null;
063        }
064}