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; 044 045 046 047/** 048 * A filter which draws a gradient interpolated between four colors defined at the corners of the image. 049 */ 050public class FourColorFilter extends PointFilter implements DynFiltering { 051 052 private int width; 053 private int height; 054 private int colorNW; 055 private int colorNE; 056 private int colorSW; 057 private int colorSE; 058 private int rNW, gNW, bNW; 059 private int rNE, gNE, bNE; 060 private int rSW, gSW, bSW; 061 private int rSE, gSE, bSE; 062 063 public FourColorFilter() { 064 setColorNW( 0xffff0000 ); 065 setColorNE( 0xffff00ff ); 066 setColorSW( 0xff0000ff ); 067 setColorSE( 0xff00ffff ); 068 } 069 070 public void setColorNW( int color ) { 071 this.colorNW = color; 072 rNW = (color >> 16) & 0xff; 073 gNW = (color >> 8) & 0xff; 074 bNW = color & 0xff; 075 } 076 077 public int getColorNW() { 078 return colorNW; 079 } 080 081 public void setColorNE( int color ) { 082 this.colorNE = color; 083 rNE = (color >> 16) & 0xff; 084 gNE = (color >> 8) & 0xff; 085 bNE = color & 0xff; 086 } 087 088 public int getColorNE() { 089 return colorNE; 090 } 091 092 public void setColorSW( int color ) { 093 this.colorSW = color; 094 rSW = (color >> 16) & 0xff; 095 gSW = (color >> 8) & 0xff; 096 bSW = color & 0xff; 097 } 098 099 public int getColorSW() { 100 return colorSW; 101 } 102 103 public void setColorSE( int color ) { 104 this.colorSE = color; 105 rSE = (color >> 16) & 0xff; 106 gSE = (color >> 8) & 0xff; 107 bSE = color & 0xff; 108 } 109 110 public int getColorSE() { 111 return colorSE; 112 } 113 114 public void setDimensions(int width, int height) { 115 this.width = width; 116 this.height = height; 117 super.setDimensions(width, height); 118 } 119 120 public int filterRGB(int x, int y, int rgb) { 121 float fx = (float)x / width; 122 float fy = (float)y / height; 123 float p, q; 124 125 p = rNW + (rNE - rNW) * fx; 126 q = rSW + (rSE - rSW) * fx; 127 int r = (int)( p + (q - p) * fy + 0.5f ); 128 129 p = gNW + (gNE - gNW) * fx; 130 q = gSW + (gSE - gSW) * fx; 131 int g = (int)( p + (q - p) * fy + 0.5f ); 132 133 p = bNW + (bNE - bNW) * fx; 134 q = bSW + (bSE - bSW) * fx; 135 int b = (int)( p + (q - p) * fy + 0.5f ); 136 137 return 0xff000000 | (r << 16) | (g << 8) | b; 138 } 139 140 public String toString() { 141 return "Texture/Four Color Fill..."; 142 } 143 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 144 Object o; 145 if((o=parameters.removeEL(KeyImpl.init("ColorNW")))!=null)setColorNW(ImageFilterUtil.toIntValue(o,"ColorNW")); 146 if((o=parameters.removeEL(KeyImpl.init("ColorNE")))!=null)setColorNE(ImageFilterUtil.toIntValue(o,"ColorNE")); 147 if((o=parameters.removeEL(KeyImpl.init("ColorSW")))!=null)setColorSW(ImageFilterUtil.toIntValue(o,"ColorSW")); 148 if((o=parameters.removeEL(KeyImpl.init("ColorSE")))!=null)setColorSE(ImageFilterUtil.toIntValue(o,"ColorSE")); 149 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 150 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 151 setDimensions(dim[0],dim[1]); 152 } 153 154 // check for arguments not supported 155 if(parameters.size()>0) { 156 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 [ColorNW, ColorNE, ColorSW, ColorSE, Dimensions]"); 157 } 158 159 return filter(src, dst); 160 } 161}