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 **/
019/*
020*
021
022Licensed under the Apache License, Version 2.0 (the "License");
023you may not use this file except in compliance with the License.
024You may obtain a copy of the License at
025
026   http://www.apache.org/licenses/LICENSE-2.0
027
028Unless required by applicable law or agreed to in writing, software
029distributed under the License is distributed on an "AS IS" BASIS,
030WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
031See the License for the specific language governing permissions and
032limitations under the License.
033*/
034
035package lucee.runtime.img.filter;import java.awt.image.BufferedImage;
036
037import lucee.runtime.engine.ThreadLocalPageContext;
038import lucee.runtime.exp.FunctionException;
039import lucee.runtime.exp.PageException;
040import lucee.runtime.img.ImageUtil;
041import lucee.runtime.type.KeyImpl;
042import lucee.runtime.type.Struct;
043import lucee.runtime.type.util.CollectionUtil;
044/**
045 * A filter which simulates chrome.
046 */
047public class ChromeFilter extends LightFilter  implements DynFiltering {
048        private float amount = 0.5f;
049        private float exposure = 1.0f;
050
051        /**
052         * Set the amount of effect.
053         * @param amount the amount
054     * @min-value 0
055     * @max-value 1
056     * @see #getAmount
057         */
058        public void setAmount(float amount) {
059                this.amount = amount;
060        }
061
062        /**
063         * Get the amount of chrome.
064         * @return the amount
065     * @see #setAmount
066         */
067        public float getAmount() {
068                return amount;
069        }
070
071        /**
072         * Set the exppsure of the effect.
073         * @param exposure the exposure
074     * @min-value 0
075     * @max-value 1
076     * @see #getExposure
077         */
078        public void setExposure(float exposure) {
079                this.exposure = exposure;
080        }
081        
082        /**
083         * Get the exppsure of the effect.
084         * @return the exposure
085     * @see #setExposure
086         */
087        public float getExposure() {
088                return exposure;
089        }
090
091    public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
092                setColorSource( LightFilter.COLORS_CONSTANT );
093                dst = super.filter( src, dst );
094                TransferFilter tf = new TransferFilter() {
095                        protected float transferFunction( float v ) {
096                                v += amount * (float)Math.sin( v * 2 * Math.PI );
097                                return 1 - (float)Math.exp(-v * exposure);
098                        }
099                };
100        return tf.filter( dst, dst );
101    }
102
103        public String toString() {
104                return "Effects/Chrome...";
105        }
106        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
107                Object o;
108                if((o=parameters.removeEL(KeyImpl.init("Amount")))!=null)setAmount(ImageFilterUtil.toFloatValue(o,"Amount"));
109                if((o=parameters.removeEL(KeyImpl.init("Exposure")))!=null)setExposure(ImageFilterUtil.toFloatValue(o,"Exposure"));
110                if((o=parameters.removeEL(KeyImpl.init("ColorSource")))!=null)setColorSource(ImageFilterUtil.toColorRGB(o,"ColorSource"));
111                if((o=parameters.removeEL(KeyImpl.init("Material")))!=null)setMaterial(ImageFilterUtil.toLightFilter$Material(o,"Material"));
112                if((o=parameters.removeEL(KeyImpl.init("BumpFunction")))!=null)setBumpFunction(ImageFilterUtil.toFunction2D(o,"BumpFunction"));
113                if((o=parameters.removeEL(KeyImpl.init("BumpHeight")))!=null)setBumpHeight(ImageFilterUtil.toFloatValue(o,"BumpHeight"));
114                if((o=parameters.removeEL(KeyImpl.init("BumpSoftness")))!=null)setBumpSoftness(ImageFilterUtil.toFloatValue(o,"BumpSoftness"));
115                if((o=parameters.removeEL(KeyImpl.init("BumpShape")))!=null)setBumpShape(ImageFilterUtil.toIntValue(o,"BumpShape"));
116                if((o=parameters.removeEL(KeyImpl.init("ViewDistance")))!=null)setViewDistance(ImageFilterUtil.toFloatValue(o,"ViewDistance"));
117                if((o=parameters.removeEL(KeyImpl.init("EnvironmentMap")))!=null)setEnvironmentMap(ImageFilterUtil.toBufferedImage(o,"EnvironmentMap"));
118                if((o=parameters.removeEL(KeyImpl.init("BumpSource")))!=null)setBumpSource(ImageFilterUtil.toIntValue(o,"BumpSource"));
119                if((o=parameters.removeEL(KeyImpl.init("DiffuseColor")))!=null)setDiffuseColor(ImageFilterUtil.toColorRGB(o,"DiffuseColor"));
120
121                // check for arguments not supported
122                if(parameters.size()>0) {
123                        throw new FunctionException(ThreadLocalPageContext.get(), "ImageFilter", 3, "parameters", "the parameter"+(parameters.size()>1?"s":"")+" ["+CollectionUtil.getKeyList(parameters,", ")+"] "+(parameters.size()>1?"are":"is")+" not allowed, only the following parameters are supported [Amount, Exposure, ColorSource, Material, BumpFunction, BumpHeight, BumpSoftness, BumpShape, ViewDistance, EnvironmentMap, BumpSource, DiffuseColor]");
124                }
125
126                return filter(src, dst);
127        }
128}
129