01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.reading.imageop;
18:
19: import java.awt.geom.AffineTransform;
20: import java.awt.image.AffineTransformOp;
21: import java.awt.image.WritableRaster;
22: import org.apache.avalon.framework.parameters.Parameters;
23: import org.apache.cocoon.ProcessingException;
24:
25: public class OffsetOperation implements ImageOperation {
26:
27: private String prefix;
28: private boolean enabled;
29: private int up;
30: private int left;
31:
32: public void setPrefix(String prefix) {
33: this .prefix = prefix;
34: }
35:
36: public void setup(Parameters params) throws ProcessingException {
37: enabled = params
38: .getParameterAsBoolean(prefix + "enabled", true);
39: up = params.getParameterAsInteger(prefix + "up", 0);
40: left = params.getParameterAsInteger(prefix + "left", 0);
41: }
42:
43: public WritableRaster apply(WritableRaster image) {
44: if (!enabled) {
45: return image;
46: }
47: AffineTransform translate = AffineTransform
48: .getTranslateInstance(left, up);
49: AffineTransformOp op = new AffineTransformOp(translate,
50: AffineTransformOp.TYPE_BILINEAR);
51: WritableRaster scaledRaster = op.filter(image, null);
52: return scaledRaster;
53: }
54:
55: public String getKey() {
56: return "offset:" + (enabled ? "enable" : "disable") + ":" + up
57: + ":" + left + ":" + prefix;
58: }
59: }
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