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:
21: import java.awt.image.AffineTransformOp;
22: import java.awt.image.WritableRaster;
23:
24: import org.apache.avalon.framework.parameters.Parameters;
25:
26: import org.apache.cocoon.ProcessingException;
27:
28: public class OffsetOperation implements ImageOperation {
29: private String m_Prefix;
30: private boolean m_Enabled;
31: private int m_Up;
32: private int m_Left;
33:
34: public void setPrefix(String prefix) {
35: m_Prefix = prefix;
36: }
37:
38: public void setup(Parameters params) throws ProcessingException {
39: m_Enabled = params.getParameterAsBoolean(m_Prefix + "enabled",
40: true);
41: m_Up = params.getParameterAsInteger(m_Prefix + "up", 0);
42: m_Left = params.getParameterAsInteger(m_Prefix + "left", 0);
43: }
44:
45: public WritableRaster apply(WritableRaster image) {
46: if (!m_Enabled)
47: return image;
48: AffineTransform translate = AffineTransform
49: .getTranslateInstance(m_Left, m_Up);
50: AffineTransformOp op = new AffineTransformOp(translate,
51: AffineTransformOp.TYPE_BILINEAR);
52: WritableRaster scaledRaster = op.filter(image, null);
53: return scaledRaster;
54: }
55:
56: public String getKey() {
57: return "offset:" + (m_Enabled ? "enable" : "disable") + ":"
58: + m_Up + ":" + m_Left + ":" + m_Prefix;
59: }
60: }
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