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 * A filter which can be used to produce wipes by transferring the luma of a mask image into the alpha channel of the source. 047 */ 048public class GradientWipeFilter extends AbstractBufferedImageOp implements DynFiltering { 049 050 private float density = 0; 051 private float softness = 0; 052 private boolean invert; 053 private BufferedImage mask; 054 055 public GradientWipeFilter() { 056 } 057 058 /** 059 * Set the density of the image in the range 0..1. 060 * *arg density The density 061 */ 062 public void setDensity( float density ) { 063 this.density = density; 064 } 065 066 public float getDensity() { 067 return density; 068 } 069 070 /** 071 * Set the softness of the dissolve in the range 0..1. 072 * @param softness the softness 073 * @min-value 0 074 * @max-value 1 075 * @see #getSoftness 076 */ 077 public void setSoftness( float softness ) { 078 this.softness = softness; 079 } 080 081 /** 082 * Get the softness of the dissolve. 083 * @return the softness 084 * @see #setSoftness 085 */ 086 public float getSoftness() { 087 return softness; 088 } 089 090 public void setMask( BufferedImage mask ) { 091 this.mask = mask; 092 } 093 094 public BufferedImage getMask() { 095 return mask; 096 } 097 098 public void setInvert( boolean invert ) { 099 this.invert = invert; 100 } 101 102 public boolean getInvert() { 103 return invert; 104 } 105 106 public BufferedImage filter( BufferedImage src, BufferedImage dst ) { 107 int width = src.getWidth(); 108 int height = src.getHeight(); 109 110 if ( dst == null ) 111 dst = createCompatibleDestImage( src, null ); 112 if ( mask == null ) 113 return dst; 114 115 int maskWidth = mask.getWidth(); 116 int maskHeight = mask.getHeight(); 117 118 float d = density * (1+softness); 119 float lower = 255 * (d-softness); 120 float upper = 255 * d; 121 122 int[] inPixels = new int[width]; 123 int[] maskPixels = new int[maskWidth]; 124 125 for ( int y = 0; y < height; y++ ) { 126 getRGB( src, 0, y, width, 1, inPixels ); 127 getRGB( mask, 0, y % maskHeight, maskWidth, 1, maskPixels ); 128 129 for ( int x = 0; x < width; x++ ) { 130 int maskRGB = maskPixels[x % maskWidth]; 131 int inRGB = inPixels[x]; 132 int v = PixelUtils.brightness( maskRGB ); 133 float f = ImageMath.smoothStep( lower, upper, v ); 134 int a = (int)(255 * f); 135 136 if ( invert ) 137 a = 255-a; 138 inPixels[x] = (a << 24) | (inRGB & 0x00ffffff); 139 } 140 141 setRGB( dst, 0, y, width, 1, inPixels ); 142 } 143 144 return dst; 145 } 146 147 public String toString() { 148 return "Transitions/Gradient Wipe..."; 149 } 150 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 151 Object o; 152 if((o=parameters.removeEL(KeyImpl.init("Density")))!=null)setDensity(ImageFilterUtil.toFloatValue(o,"Density")); 153 if((o=parameters.removeEL(KeyImpl.init("Softness")))!=null)setSoftness(ImageFilterUtil.toFloatValue(o,"Softness")); 154 if((o=parameters.removeEL(KeyImpl.init("Invert")))!=null)setInvert(ImageFilterUtil.toBooleanValue(o,"Invert")); 155 if((o=parameters.removeEL(KeyImpl.init("Mask")))!=null)setMask(ImageFilterUtil.toBufferedImage(o,"Mask")); 156 157 // check for arguments not supported 158 if(parameters.size()>0) { 159 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 [Density, Softness, Invert, Mask]"); 160 } 161 162 return filter(src, dst); 163 } 164}