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.color.ColorSpace;
20: import java.awt.image.ColorConvertOp;
21: import java.awt.image.WritableRaster;
22: import org.apache.avalon.framework.parameters.Parameters;
23:
24: public class GrayScaleOperation implements ImageOperation {
25:
26: private String prefix;
27: private boolean enabled;
28:
29: public void setPrefix(String prefix) {
30: this .prefix = prefix;
31: }
32:
33: public void setup(Parameters params) {
34: enabled = params
35: .getParameterAsBoolean(prefix + "enabled", true);
36: }
37:
38: public WritableRaster apply(WritableRaster image) {
39: if (!enabled) {
40: return image;
41: }
42: ColorSpace grayspace = ColorSpace
43: .getInstance(ColorSpace.CS_GRAY);
44: ColorConvertOp op = new ColorConvertOp(grayspace, null);
45: WritableRaster r = op.filter(image, null);
46: return r;
47: }
48:
49: public String getKey() {
50: return "grayscale:" + (enabled ? "enable" : "disable") + ":"
51: + prefix;
52: }
53: }
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