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
046
047public class RGBAdjustFilter extends PointFilter  implements DynFiltering {
048        
049        public float rFactor, gFactor, bFactor;
050
051        public RGBAdjustFilter() {
052                this(0, 0, 0);
053        }
054
055        public RGBAdjustFilter(float r, float g, float b) {
056                rFactor = 1+r;
057                gFactor = 1+g;
058                bFactor = 1+b;
059                canFilterIndexColorModel = true;
060        }
061
062        public void setRFactor( float rFactor ) {
063                this.rFactor = 1+rFactor;
064        }
065        
066        public float getRFactor() {
067                return rFactor-1;
068        }
069        
070        public void setGFactor( float gFactor ) {
071                this.gFactor = 1+gFactor;
072        }
073        
074        public float getGFactor() {
075                return gFactor-1;
076        }
077        
078        public void setBFactor( float bFactor ) {
079                this.bFactor = 1+bFactor;
080        }
081        
082        public float getBFactor() {
083                return bFactor-1;
084        }
085
086        public int[] getLUT() {
087                int[] lut = new int[256];
088                for ( int i = 0; i < 256; i++ ) {
089                        lut[i] = filterRGB( 0, 0, (i << 24) | (i << 16) | (i << 8) | i );
090                }
091                return lut;
092        }
093        
094        public int filterRGB(int x, int y, int rgb) {
095                int a = rgb & 0xff000000;
096                int r = (rgb >> 16) & 0xff;
097                int g = (rgb >> 8) & 0xff;
098                int b = rgb & 0xff;
099                r = PixelUtils.clamp((int)(r * rFactor));
100                g = PixelUtils.clamp((int)(g * gFactor));
101                b = PixelUtils.clamp((int)(b * bFactor));
102                return a | (r << 16) | (g << 8) | b;
103        }
104
105        public String toString() {
106                return "Colors/Adjust RGB...";
107        }
108        public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src);
109                Object o;
110                if((o=parameters.removeEL(KeyImpl.init("BFactor")))!=null)setBFactor(ImageFilterUtil.toFloatValue(o,"BFactor"));
111                if((o=parameters.removeEL(KeyImpl.init("RFactor")))!=null)setRFactor(ImageFilterUtil.toFloatValue(o,"RFactor"));
112                if((o=parameters.removeEL(KeyImpl.init("GFactor")))!=null)setGFactor(ImageFilterUtil.toFloatValue(o,"GFactor"));
113                if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){
114                        int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions");
115                        setDimensions(dim[0],dim[1]);
116                }
117
118                // check for arguments not supported
119                if(parameters.size()>0) {
120                        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 [BFactor, RFactor, GFactor, Dimensions]");
121                }
122
123                return filter(src, dst);
124        }
125}
126