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Java > Open Source Codes > org > pdfbox > util > operator > Concatenate


1 /**
2  * Copyright (c) 2004-2006, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox.util.operator;
32
33 import java.util.List JavaDoc;
34 import org.pdfbox.cos.COSNumber;
35 import org.pdfbox.util.Matrix;
36 import org.pdfbox.util.PDFOperator;
37
38 /**
39  *
40  * <p>Titre : PDFEngine Modification.</p>
41  * <p>Description : Structal modification of the PDFEngine class :
42 * the long sequence of conditions in processOperator is remplaced by
43 * this strategy pattern</p>
44  * <p>Copyright : Copyright (c) 2004</p>
45  * <p>Société : DBGS</p>
46  * @author Huault : huault@free.fr
47  * @version $Revision: 1.5 $
48  */
49
50 public class Concatenate extends OperatorProcessor
51 {
52
53     /**
54      * process : cm : Concatenate matrix to current transformation matrix.
55      * @param operator The operator that is being executed.
56      * @param arguments List
57      */
58     public void process(PDFOperator operator, List JavaDoc arguments)
59     {
60
61         //concatenate matrix to current transformation matrix
62 COSNumber a = (COSNumber) arguments.get(0);
63         COSNumber b = (COSNumber) arguments.get(1);
64         COSNumber c = (COSNumber) arguments.get(2);
65         COSNumber d = (COSNumber) arguments.get(3);
66         COSNumber e = (COSNumber) arguments.get(4);
67         COSNumber f = (COSNumber) arguments.get(5);
68     
69         Matrix newMatrix = new Matrix();
70         newMatrix.setValue(0, 0, a.floatValue());
71         newMatrix.setValue(0, 1, b.floatValue());
72         newMatrix.setValue(1, 0, c.floatValue());
73         newMatrix.setValue(1, 1, d.floatValue());
74         newMatrix.setValue(2, 0, e.floatValue());
75         newMatrix.setValue(2, 1, f.floatValue());
76     
77         //this line has changed
78 context.getGraphicsState().setCurrentTransformationMatrix(
79                 newMatrix.multiply( context.getGraphicsState().getCurrentTransformationMatrix() ) );
80
81     }
82 }
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