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


1 /**
2  * Copyright (c) 2004, 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 java.util.Map JavaDoc;
35
36 import org.pdfbox.cos.COSName;
37 import org.pdfbox.pdmodel.graphics.color.PDColorSpace;
38 import org.pdfbox.pdmodel.graphics.color.PDColorSpaceFactory;
39 import org.pdfbox.pdmodel.graphics.color.PDColorSpaceInstance;
40 import org.pdfbox.pdmodel.graphics.color.PDDeviceCMYK;
41 import org.pdfbox.util.PDFOperator;
42
43 import java.io.IOException JavaDoc;
44
45 /**
46  * <p>Structal modification of the PDFEngine class :
47  * the long sequence of conditions in processOperator is remplaced by
48  * this strategy pattern.</p>
49  *
50  * @author <a HREF="mailto:ben@benlitchfield.com">Ben Litchfield</a>
51  * @version $Revision: 1.5 $
52  */
53
54 public class SetStrokingColorSpace extends OperatorProcessor
55 {
56     private static final float[] EMPTY_FLOAT_ARRAY = new float[0];
57
58     /**
59      * CS Set color space for stroking operations.
60      * @param operator The operator that is being executed.
61      * @param arguments List
62      * @throws IOException If an error occurs while processing the font.
63      */
64     public void process(PDFOperator operator, List JavaDoc arguments) throws IOException JavaDoc
65     {
66         //(PDF 1.1) Set color space for stroking operations
67 COSName name = (COSName)arguments.get( 0 );
68         Map JavaDoc colorSpaces = context.getColorSpaces();
69         PDColorSpace cs = null;
70         if( colorSpaces != null )
71         {
72             cs = (PDColorSpace)colorSpaces.get( name.getName() );
73         }
74         if( cs == null )
75         {
76             cs = PDColorSpaceFactory.createColorSpace( name );
77         }
78         PDColorSpaceInstance colorInstance = context.getGraphicsState().getStrokingColorSpace();
79         colorInstance.setColorSpace( cs );
80         int numComponents = cs.getNumberOfComponents();
81         float[] values = EMPTY_FLOAT_ARRAY;
82         if( numComponents >= 0 )
83         {
84             values = new float[numComponents];
85             for( int i=0; i<numComponents; i++ )
86             {
87                 values[i] = 0f;
88             }
89             if( cs instanceof PDDeviceCMYK )
90             {
91                 values[3] = 1f;
92             }
93         }
94         colorInstance.setColorSpaceValue( values );
95     }
96 }
97
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