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; 036import java.util.Random; 037 038import lucee.runtime.engine.ThreadLocalPageContext; 039import lucee.runtime.exp.FunctionException; 040import lucee.runtime.exp.PageException; 041import lucee.runtime.img.ImageUtil; 042import lucee.runtime.type.KeyImpl; 043import lucee.runtime.type.Struct; 044import lucee.runtime.type.util.CollectionUtil; 045 046public class SparkleFilter extends PointFilter implements DynFiltering { 047 048 private int rays = 50; 049 private int radius = 25; 050 private int amount = 50; 051 private int color = 0xffffffff; 052 private int randomness = 25; 053 private int width, height; 054 private int centreX, centreY; 055 private long seed = 371; 056 private float[] rayLengths; 057 private Random randomNumbers = new Random(); 058 059 public SparkleFilter() { 060 } 061 062 public void setColor(int color) { 063 this.color = color; 064 } 065 066 public int getColor() { 067 return color; 068 } 069 070 public void setRandomness(int randomness) { 071 this.randomness = randomness; 072 } 073 074 public int getRandomness() { 075 return randomness; 076 } 077 078 /** 079 * Set the amount of sparkle. 080 * @param amount the amount 081 * @min-value 0 082 * @max-value 1 083 * @see #getAmount 084 */ 085 public void setAmount(int amount) { 086 this.amount = amount; 087 } 088 089 /** 090 * Get the amount of sparkle. 091 * @return the amount 092 * @see #setAmount 093 */ 094 public int getAmount() { 095 return amount; 096 } 097 098 public void setRays(int rays) { 099 this.rays = rays; 100 } 101 102 public int getRays() { 103 return rays; 104 } 105 106 /** 107 * Set the radius of the effect. 108 * @param radius the radius 109 * @min-value 0 110 * @see #getRadius 111 */ 112 public void setRadius(int radius) { 113 this.radius = radius; 114 } 115 116 /** 117 * Get the radius of the effect. 118 * @return the radius 119 * @see #setRadius 120 */ 121 public int getRadius() { 122 return radius; 123 } 124 125 public void setDimensions(int width, int height) { 126 this.width = width; 127 this.height = height; 128 centreX = width/2; 129 centreY = height/2; 130 super.setDimensions(width, height); 131 randomNumbers.setSeed(seed); 132 rayLengths = new float[rays]; 133 for (int i = 0; i < rays; i++) 134 rayLengths[i] = radius + randomness / 100.0f * radius * (float)randomNumbers.nextGaussian(); 135 } 136 137 public int filterRGB(int x, int y, int rgb) { 138 float dx = x-centreX; 139 float dy = y-centreY; 140 float distance = dx*dx+dy*dy; 141 float angle = (float)Math.atan2(dy, dx); 142 float d = (angle+ImageMath.PI) / (ImageMath.TWO_PI) * rays; 143 int i = (int)d; 144 float f = d - i; 145 146 if (radius != 0) { 147 float length = ImageMath.lerp(f, rayLengths[i % rays], rayLengths[(i+1) % rays]); 148 float g = length*length / (distance+0.0001f); 149 g = (float)Math.pow(g, (100-amount) / 50.0); 150 f -= 0.5f; 151// f *= amount/50.0f; 152 f = 1 - f*f; 153 f *= g; 154 } 155 f = ImageMath.clamp(f, 0, 1); 156 return ImageMath.mixColors(f, rgb, color); 157 } 158 159 public String toString() { 160 return "Stylize/Sparkle..."; 161 } 162 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 163 Object o; 164 if((o=parameters.removeEL(KeyImpl.init("Radius")))!=null)setRadius(ImageFilterUtil.toIntValue(o,"Radius")); 165 if((o=parameters.removeEL(KeyImpl.init("Amount")))!=null)setAmount(ImageFilterUtil.toIntValue(o,"Amount")); 166 if((o=parameters.removeEL(KeyImpl.init("Randomness")))!=null)setRandomness(ImageFilterUtil.toIntValue(o,"Randomness")); 167 if((o=parameters.removeEL(KeyImpl.init("Rays")))!=null)setRays(ImageFilterUtil.toIntValue(o,"Rays")); 168 if((o=parameters.removeEL(KeyImpl.init("Color")))!=null)setColor(ImageFilterUtil.toColorRGB(o,"Color")); 169 if((o=parameters.removeEL(KeyImpl.init("Dimensions")))!=null){ 170 int[] dim=ImageFilterUtil.toDimensions(o,"Dimensions"); 171 setDimensions(dim[0],dim[1]); 172 } 173 174 // check for arguments not supported 175 if(parameters.size()>0) { 176 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 [Radius, Amount, Randomness, Rays, Color, Dimensions]"); 177 } 178 179 return filter(src, dst); 180 } 181}