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 MirrorOperation implements ImageOperation {
29: private String m_Prefix;
30: private boolean m_Enabled;
31: private boolean m_AlongY;
32:
33: public void setPrefix(String prefix) {
34: m_Prefix = prefix;
35: }
36:
37: public void setup(Parameters params) throws ProcessingException {
38: m_Enabled = params.getParameterAsBoolean(m_Prefix + "enabled",
39: true);
40: m_AlongY = params.getParameterAsBoolean(m_Prefix + "along-y",
41: false);
42: }
43:
44: public WritableRaster apply(WritableRaster image) {
45: if (!m_Enabled)
46: return image;
47: int xScale;
48: int yScale;
49: if (m_AlongY) {
50: xScale = -1;
51: yScale = 1;
52: } else {
53: xScale = 1;
54: yScale = -1;
55: }
56: AffineTransform transform = new AffineTransform(xScale, 0.0d,
57: 0.0d, yScale, 0.0d, 0.0d);
58: AffineTransformOp op = new AffineTransformOp(transform,
59: AffineTransformOp.TYPE_BILINEAR);
60: WritableRaster scaledRaster = op.filter(image, null);
61: return scaledRaster;
62: }
63:
64: public String getKey() {
65: return "mirror:" + (m_Enabled ? "enable" : "disable") + ":"
66: + (m_AlongY ? "along-y" : "along-x") + ":" + m_Prefix;
67: }
68: }
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