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 ShearOperation implements ImageOperation {
25:
26: private String prefix;
27: private boolean enabled;
28: private float shearX;
29: private float shearY;
30:
31: public void setPrefix(String prefix) {
32: this .prefix = prefix;
33: }
34:
35: public void setup(Parameters params) {
36: enabled = params
37: .getParameterAsBoolean(prefix + "enabled", true);
38: shearX = params.getParameterAsFloat(prefix + "shear-x", 0.0f);
39: shearY = params.getParameterAsFloat(prefix + "shear-y", 0.0f);
40: }
41:
42: public WritableRaster apply(WritableRaster image) {
43: if (!enabled) {
44: return image;
45: }
46: AffineTransform shear = AffineTransform.getShearInstance(
47: shearX, shearY);
48: AffineTransformOp op = new AffineTransformOp(shear,
49: AffineTransformOp.TYPE_BILINEAR);
50: WritableRaster scaledRaster = op.filter(image, null);
51: return scaledRaster;
52: }
53:
54: public String getKey() {
55: return "shear:" + (enabled ? "enable" : "disable") + ":"
56: + shearX + ":" + shearY + ":" + prefix;
57: }
58: }
|