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:
21: import java.awt.image.ColorConvertOp;
22: import java.awt.image.WritableRaster;
23:
24: import org.apache.avalon.framework.parameters.Parameters;
25:
26: public class GrayScaleOperation implements ImageOperation {
27: private String m_Prefix;
28: private boolean m_Enabled;
29:
30: public void setPrefix(String prefix) {
31: m_Prefix = prefix;
32: }
33:
34: public void setup(Parameters params) {
35: m_Enabled = params.getParameterAsBoolean(m_Prefix + "enabled",
36: true);
37: }
38:
39: public WritableRaster apply(WritableRaster image) {
40: if (!m_Enabled)
41: return image;
42:
43: ColorSpace grayspace = ColorSpace
44: .getInstance(ColorSpace.CS_GRAY);
45: ColorConvertOp op = new ColorConvertOp(grayspace, null);
46: WritableRaster r = op.filter(image, null);
47: return r;
48: }
49:
50: public String getKey() {
51: return "grayscale:" + (m_Enabled ? "enable" : "disable") + ":"
52: + m_Prefix;
53: }
54: }
|