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.Rectangle; 036import java.awt.image.BufferedImage; 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; 045 046/** 047 * A class to emboss an image. 048 */ 049public class EmbossFilter extends WholeImageFilter implements DynFiltering { 050 051 private final static float pixelScale = 255.9f; 052 053 private float azimuth = 135.0f * ImageMath.PI / 180.0f, elevation = 30.0f * ImageMath.PI / 180f; 054 private boolean emboss = false; 055 private float width45 = 3.0f; 056 057 public EmbossFilter() { 058 } 059 060 public void setAzimuth(float azimuth) { 061 this.azimuth = azimuth; 062 } 063 064 public float getAzimuth() { 065 return azimuth; 066 } 067 068 public void setElevation(float elevation) { 069 this.elevation = elevation; 070 } 071 072 public float getElevation() { 073 return elevation; 074 } 075 076 public void setBumpHeight(float bumpHeight) { 077 this.width45 = 3 * bumpHeight; 078 } 079 080 public float getBumpHeight() { 081 return width45 / 3; 082 } 083 084 public void setEmboss(boolean emboss) { 085 this.emboss = emboss; 086 } 087 088 public boolean getEmboss() { 089 return emboss; 090 } 091 092 protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) { 093 int index = 0; 094 int[] outPixels = new int[width * height]; 095 096 int[] bumpPixels; 097 int bumpMapWidth, bumpMapHeight; 098 099 bumpMapWidth = width; 100 bumpMapHeight = height; 101 bumpPixels = new int[bumpMapWidth * bumpMapHeight]; 102 for (int i = 0; i < inPixels.length; i++) 103 bumpPixels[i] = PixelUtils.brightness(inPixels[i]); 104 105 int Nx, Ny, Nz, Lx, Ly, Lz, Nz2, NzLz, NdotL; 106 int shade, background; 107 108 Lx = (int)(Math.cos(azimuth) * Math.cos(elevation) * pixelScale); 109 Ly = (int)(Math.sin(azimuth) * Math.cos(elevation) * pixelScale); 110 Lz = (int)(Math.sin(elevation) * pixelScale); 111 112 Nz = (int)(6 * 255 / width45); 113 Nz2 = Nz * Nz; 114 NzLz = Nz * Lz; 115 116 background = Lz; 117 118 int bumpIndex = 0; 119 120 for (int y = 0; y < height; y++, bumpIndex += bumpMapWidth) { 121 int s1 = bumpIndex; 122 int s2 = s1 + bumpMapWidth; 123 int s3 = s2 + bumpMapWidth; 124 125 for (int x = 0; x < width; x++, s1++, s2++, s3++) { 126 if (y != 0 && y < height-2 && x != 0 && x < width-2) { 127 Nx = bumpPixels[s1-1] + bumpPixels[s2-1] + bumpPixels[s3-1] - bumpPixels[s1+1] - bumpPixels[s2+1] - bumpPixels[s3+1]; 128 Ny = bumpPixels[s3-1] + bumpPixels[s3] + bumpPixels[s3+1] - bumpPixels[s1-1] - bumpPixels[s1] - bumpPixels[s1+1]; 129 130 if (Nx == 0 && Ny == 0) 131 shade = background; 132 else if ((NdotL = Nx*Lx + Ny*Ly + NzLz) < 0) 133 shade = 0; 134 else 135 shade = (int)(NdotL / Math.sqrt(Nx*Nx + Ny*Ny + Nz2)); 136 } else 137 shade = background; 138 139 if (emboss) { 140 int rgb = inPixels[index]; 141 int a = rgb & 0xff000000; 142 int r = (rgb >> 16) & 0xff; 143 int g = (rgb >> 8) & 0xff; 144 int b = rgb & 0xff; 145 r = (r*shade) >> 8; 146 g = (g*shade) >> 8; 147 b = (b*shade) >> 8; 148 outPixels[index++] = a | (r << 16) | (g << 8) | b; 149 } else 150 outPixels[index++] = 0xff000000 | (shade << 16) | (shade << 8) | shade; 151 } 152 } 153 154 return outPixels; 155 } 156 157 public String toString() { 158 return "Stylize/Emboss..."; 159 } 160 161 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 162 Object o; 163 if((o=parameters.removeEL(KeyImpl.init("BumpHeight")))!=null)setBumpHeight(ImageFilterUtil.toFloatValue(o,"BumpHeight")); 164 if((o=parameters.removeEL(KeyImpl.init("Azimuth")))!=null)setAzimuth(ImageFilterUtil.toFloatValue(o,"Azimuth")); 165 if((o=parameters.removeEL(KeyImpl.init("Elevation")))!=null)setElevation(ImageFilterUtil.toFloatValue(o,"Elevation")); 166 if((o=parameters.removeEL(KeyImpl.init("Emboss")))!=null)setEmboss(ImageFilterUtil.toBooleanValue(o,"Emboss")); 167 168 // check for arguments not supported 169 if(parameters.size()>0) { 170 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 [BumpHeight, Azimuth, Elevation, Emboss]"); 171 } 172 173 return filter(src, dst); 174 } 175}