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.type.KeyImpl; 023 import railo.runtime.type.List; 024 import railo.runtime.type.Struct; 025 /** 026 * A Filter to pixellate images. 027 */ 028 public class BlockFilter extends TransformFilter implements DynFiltering { 029 030 private int blockSize = 2; 031 032 /** 033 * Set the pixel block size. 034 * @param blockSize the number of pixels along each block edge 035 * @min-value 1 036 * @max-value 100+ 037 * @see #getBlockSize 038 */ 039 public void setBlockSize(int blockSize) { 040 this.blockSize = blockSize; 041 } 042 043 /** 044 * Get the pixel block size. 045 * @return the number of pixels along each block edge 046 * @see #setBlockSize 047 */ 048 public int getBlockSize() { 049 return blockSize; 050 } 051 052 053 public BlockFilter() { 054 } 055 056 protected void transformInverse(int x, int y, float[] out) { 057 out[0] = (x / blockSize) * blockSize; 058 out[1] = (y / blockSize) * blockSize; 059 } 060 061 public String toString() { 062 return "Stylize/Mosaic..."; 063 } 064 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=null;//ImageUtil.createBufferedImage(src); 065 Object o; 066 if((o=parameters.removeEL(KeyImpl.init("BlockSize")))!=null)setBlockSize(ImageFilterUtil.toIntValue(o,"BlockSize")); 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 [BlockSize, EdgeAction, Interpolation]"); 073 } 074 075 return filter(src, dst); 076 } 077 } 078