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:
24: public class ScaleOperation implements ImageOperation {
25:
26: private String prefix;
27: private boolean enabled;
28: private float scale;
29:
30: public void setPrefix(String prefix) {
31: this .prefix = prefix;
32: }
33:
34: public void setup(Parameters params) {
35: enabled = params
36: .getParameterAsBoolean(prefix + "enabled", true);
37: scale = params.getParameterAsFloat(prefix + "scale", 1.0f);
38: }
39:
40: public WritableRaster apply(WritableRaster image) {
41: if (!enabled) {
42: return image;
43: }
44: AffineTransform scale = AffineTransform.getScaleInstance(
45: this .scale, this .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:" + (enabled ? "enable" : "disable") + ":"
54: + scale + ":" + prefix;
55: }
56: }
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