| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cocoon.reading.imageop; |
| |
| import java.awt.geom.AffineTransform; |
| import java.awt.image.AffineTransformOp; |
| import java.awt.image.WritableRaster; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.cocoon.ProcessingException; |
| |
| public class OffsetOperation |
| implements ImageOperation { |
| |
| private String prefix; |
| private boolean enabled; |
| private int up; |
| private int left; |
| |
| public void setPrefix( String prefix ) { |
| this. prefix = prefix; |
| } |
| |
| public void setup( Parameters params ) |
| throws ProcessingException { |
| enabled = params.getParameterAsBoolean( prefix + "enabled", true); |
| up = params.getParameterAsInteger( prefix + "up", 0 ); |
| left = params.getParameterAsInteger( prefix + "left", 0 ); |
| } |
| |
| public WritableRaster apply( WritableRaster image ) { |
| if( ! enabled ) { |
| return image; |
| } |
| AffineTransform translate = AffineTransform.getTranslateInstance( left, up ); |
| AffineTransformOp op = new AffineTransformOp( translate, AffineTransformOp.TYPE_BILINEAR ); |
| WritableRaster scaledRaster = op.filter( image, null ); |
| return scaledRaster; |
| } |
| |
| public String getKey() { |
| return "offset:" |
| + ( enabled ? "enable" : "disable" ) |
| + ":" + up |
| + ":" + left |
| + ":" + prefix; |
| } |
| } |