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: public class ScaleOperation implements ImageOperation {
27: private String m_Prefix;
28: private boolean m_Enabled;
29: private float m_Scale;
30:
31: public void setPrefix(String prefix) {
32: m_Prefix = prefix;
33: }
34:
35: public void setup(Parameters params) {
36: m_Enabled = params.getParameterAsBoolean(m_Prefix + "enabled",
37: true);
38: m_Scale = params.getParameterAsFloat(m_Prefix + "scale", 1.0f);
39: }
40:
41: public WritableRaster apply(WritableRaster image) {
42: if (!m_Enabled)
43: return image;
44: AffineTransform scale = AffineTransform.getScaleInstance(
45: m_Scale, m_Scale);
46: AffineTransformOp op = new AffineTransformOp(scale,
47: AffineTransformOp.TYPE_BILINEAR);
48: WritableRaster scaledRaster = op.filter(image, null);
49: return scaledRaster;
50: }
51:
52: public String getKey() {
53: return "scale:" + (m_Enabled ? "enable" : "disable") + ":"
54: + m_Scale + ":" + m_Prefix;
55: }
56: }
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