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.geom.Point2D; 036import java.awt.image.BufferedImage; 037 038import lucee.runtime.engine.ThreadLocalPageContext; 039import lucee.runtime.exp.ExpressionException; 040import lucee.runtime.exp.FunctionException; 041import lucee.runtime.exp.PageException; 042import lucee.runtime.type.KeyImpl; 043import lucee.runtime.type.Struct; 044import lucee.runtime.type.util.CollectionUtil; 045/** 046 * A filter which wraps an image around a circular arc. 047 */ 048public class CircleFilter extends TransformFilter implements DynFiltering { 049 050 private float radius = 10; 051 private float height = 20; 052 private float angle = 0; 053 private float spreadAngle = (float)Math.PI; 054 private float centreX = 0.5f; 055 private float centreY = 0.5f; 056 057 private float icentreX; 058 private float icentreY; 059 private float iWidth; 060 private float iHeight; 061 062 /** 063 * Construct a CircleFilter. 064 */ 065 public CircleFilter() { 066 try { 067 setEdgeAction( "ZERO" ); 068 } catch (ExpressionException e) {} 069 } 070 071 /** 072 * Set the height of the arc. 073 * @param height the height 074 * @see #getHeight 075 */ 076 public void setHeight(float height) { 077 this.height = height; 078 } 079 080 /** 081 * Get the height of the arc. 082 * @return the height 083 * @see #setHeight 084 */ 085 public float getHeight() { 086 return height; 087 } 088 089 /** 090 * Set the angle of the arc. 091 * @param angle the angle of the arc. 092 * @angle 093 * @see #getAngle 094 */ 095 public void setAngle(float angle) { 096 this.angle = angle; 097 } 098 099 /** 100 * Returns the angle of the arc. 101 * @return the angle of the arc. 102 * @see #setAngle 103 */ 104 public float getAngle() { 105 return angle; 106 } 107 108 /** 109 * Set the spread angle of the arc. 110 * @param spreadAngle the angle 111 * @angle 112 * @see #getSpreadAngle 113 */ 114 public void setSpreadAngle(float spreadAngle) { 115 this.spreadAngle = spreadAngle; 116 } 117 118 /** 119 * Get the spread angle of the arc. 120 * @return the angle 121 * @angle 122 * @see #setSpreadAngle 123 */ 124 public float getSpreadAngle() { 125 return spreadAngle; 126 } 127 128 /** 129 * Set the radius of the effect. 130 * @param radius the radius 131 * @min-value 0 132 * @see #getRadius 133 */ 134 public void setRadius(float radius) { 135 this.radius = radius; 136 } 137 138 /** 139 * Get the radius of the effect. 140 * @return the radius 141 * @see #setRadius 142 */ 143 public float getRadius() { 144 return radius; 145 } 146 147 /** 148 * Set the centre of the effect in the Y direction as a proportion of the image size. 149 * @param centreX the center 150 * @see #getCentreX 151 */ 152 public void setCentreX( float centreX ) { 153 this.centreX = centreX; 154 } 155 156 /** 157 * Get the centre of the effect in the X direction as a proportion of the image size. 158 * @return the center 159 * @see #setCentreX 160 */ 161 public float getCentreX() { 162 return centreX; 163 } 164 165 /** 166 * Set the centre of the effect in the Y direction as a proportion of the image size. 167 * @param centreY the center 168 * @see #getCentreY 169 */ 170 public void setCentreY( float centreY ) { 171 this.centreY = centreY; 172 } 173 174 /** 175 * Get the centre of the effect in the Y direction as a proportion of the image size. 176 * @return the center 177 * @see #setCentreY 178 */ 179 public float getCentreY() { 180 return centreY; 181 } 182 183 /** 184 * Set the centre of the effect as a proportion of the image size. 185 * @param centre the center 186 * @see #getCentre 187 */ 188 public void setCentre( Point2D centre ) { 189 this.centreX = (float)centre.getX(); 190 this.centreY = (float)centre.getY(); 191 } 192 193 /** 194 * Get the centre of the effect as a proportion of the image size. 195 * @return the center 196 * @see #setCentre 197 */ 198 public Point2D getCentre() { 199 return new Point2D.Float( centreX, centreY ); 200 } 201 202 public BufferedImage filter( BufferedImage src, BufferedImage dst ) { 203 iWidth = src.getWidth(); 204 iHeight = src.getHeight(); 205 icentreX = iWidth * centreX; 206 icentreY = iHeight * centreY; 207 iWidth--; 208 return super.filter( src, dst ); 209 } 210 211 protected void transformInverse(int x, int y, float[] out) { 212 float dx = x-icentreX; 213 float dy = y-icentreY; 214 float theta = (float)Math.atan2( -dy, -dx ) + angle; 215 float r = (float)Math.sqrt( dx*dx + dy*dy ); 216 217 theta = ImageMath.mod( theta, 2*(float)Math.PI ); 218 219 out[0] = iWidth * theta/(spreadAngle+0.00001f); 220 out[1] = iHeight * (1-(r-radius)/(height+0.00001f)); 221 } 222 223 public String toString() { 224 return "Distort/Circle..."; 225 } 226 227 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=null;//ImageUtil.createBufferedImage(src); 228 Object o; 229 if((o=parameters.removeEL(KeyImpl.init("Radius")))!=null)setRadius(ImageFilterUtil.toFloatValue(o,"Radius")); 230 if((o=parameters.removeEL(KeyImpl.init("Angle")))!=null)setAngle(ImageFilterUtil.toFloatValue(o,"Angle")); 231 if((o=parameters.removeEL(KeyImpl.init("SpreadAngle")))!=null)setSpreadAngle(ImageFilterUtil.toFloatValue(o,"SpreadAngle")); 232 if((o=parameters.removeEL(KeyImpl.init("CentreX")))!=null)setCentreX(ImageFilterUtil.toFloatValue(o,"CentreX")); 233 if((o=parameters.removeEL(KeyImpl.init("CentreY")))!=null)setCentreY(ImageFilterUtil.toFloatValue(o,"CentreY")); 234 //if((o=parameters.removeEL(KeyImpl.init("Centre")))!=null)setCentre(ImageFilterUtil.toPoint2D(o,"Centre")); 235 if((o=parameters.removeEL(KeyImpl.init("Height")))!=null)setHeight(ImageFilterUtil.toFloatValue(o,"Height")); 236 if((o=parameters.removeEL(KeyImpl.init("EdgeAction")))!=null)setEdgeAction(ImageFilterUtil.toString(o,"EdgeAction")); 237 if((o=parameters.removeEL(KeyImpl.init("Interpolation")))!=null)setInterpolation(ImageFilterUtil.toString(o,"Interpolation")); 238 239 // check for arguments not supported 240 if(parameters.size()>0) { 241 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, Angle, SpreadAngle, CentreX, CentreY, Centre, Height, EdgeAction, Interpolation]"); 242 } 243 244 return filter(src, dst); 245 } 246}