001 /* 002 * 003 004 Licensed under the Apache License, Version 2.0 (the "License"); 005 you may not use this file except in compliance with the License. 006 You may obtain a copy of the License at 007 008 http://www.apache.org/licenses/LICENSE-2.0 009 010 Unless required by applicable law or agreed to in writing, software 011 distributed under the License is distributed on an "AS IS" BASIS, 012 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 See the License for the specific language governing permissions and 014 limitations under the License. 015 */ 016 017 package railo.runtime.img.filter;import java.awt.image.BufferedImage; 018 019 import railo.runtime.engine.ThreadLocalPageContext; 020 import railo.runtime.exp.FunctionException; 021 import railo.runtime.exp.PageException; 022 import railo.runtime.img.ImageUtil; 023 import railo.runtime.img.math.Function2D; 024 import railo.runtime.type.KeyImpl; 025 import railo.runtime.type.List; 026 import railo.runtime.type.Struct; 027 028 public class MapFilter extends TransformFilter implements DynFiltering { 029 030 private Function2D xMapFunction; 031 private Function2D yMapFunction; 032 033 public MapFilter() { 034 } 035 036 public void setXMapFunction(Function2D xMapFunction) { 037 this.xMapFunction = xMapFunction; 038 } 039 040 public Function2D getXMapFunction() { 041 return xMapFunction; 042 } 043 044 public void setYMapFunction(Function2D yMapFunction) { 045 this.yMapFunction = yMapFunction; 046 } 047 048 public Function2D getYMapFunction() { 049 return yMapFunction; 050 } 051 052 protected void transformInverse(int x, int y, float[] out) { 053 float xMap, yMap; 054 xMap = xMapFunction.evaluate(x, y); 055 yMap = yMapFunction.evaluate(x, y); 056 out[0] = xMap * transformedSpace.width; 057 out[1] = yMap * transformedSpace.height; 058 } 059 060 public String toString() { 061 return "Distort/Map Coordinates..."; 062 } 063 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 064 Object o; 065 if((o=parameters.removeEL(KeyImpl.init("XMapFunction")))!=null)setXMapFunction(ImageFilterUtil.toFunction2D(o,"XMapFunction")); 066 if((o=parameters.removeEL(KeyImpl.init("YMapFunction")))!=null)setYMapFunction(ImageFilterUtil.toFunction2D(o,"YMapFunction")); 067 if((o=parameters.removeEL(KeyImpl.init("EdgeAction")))!=null)setEdgeAction(ImageFilterUtil.toString(o,"EdgeAction")); 068 if((o=parameters.removeEL(KeyImpl.init("Interpolation")))!=null)setInterpolation(ImageFilterUtil.toString(o,"Interpolation")); 069 070 // check for arguments not supported 071 if(parameters.size()>0) { 072 throw new FunctionException(ThreadLocalPageContext.get(), "ImageFilter", 3, "parameters", "the parameter"+(parameters.size()>1?"s":"")+" ["+List.arrayToList(parameters.keysAsString(),", ")+"] "+(parameters.size()>1?"are":"is")+" not allowed, only the following parameters are supported [XMapFunction, YMapFunction, EdgeAction, Interpolation]"); 073 } 074 075 return filter(src, dst); 076 } 077 }