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 MirrorOperation implements ImageOperation {
26:
27: private String prefix;
28: private boolean enabled;
29: private boolean alongY;
30:
31: public void setPrefix(String prefix) {
32: this .prefix = prefix;
33: }
34:
35: public void setup(Parameters params) throws ProcessingException {
36: enabled = params
37: .getParameterAsBoolean(prefix + "enabled", true);
38: alongY = params
39: .getParameterAsBoolean(prefix + "along-y", false);
40: }
41:
42: public WritableRaster apply(WritableRaster image) {
43: if (!enabled) {
44: return image;
45: }
46: int xScale;
47: int yScale;
48: if (alongY) {
49: xScale = -1;
50: yScale = 1;
51: } else {
52: xScale = 1;
53: yScale = -1;
54: }
55: AffineTransform transform = new AffineTransform(xScale, 0.0d,
56: 0.0d, yScale, 0.0d, 0.0d);
57: AffineTransformOp op = new AffineTransformOp(transform,
58: AffineTransformOp.TYPE_BILINEAR);
59: WritableRaster scaledRaster = op.filter(image, null);
60: return scaledRaster;
61: }
62:
63: public String getKey() {
64: return "mirror:" + (enabled ? "enable" : "disable") + ":"
65: + (alongY ? "along-y" : "along-x") + ":" + prefix;
66: }
67: }
|