1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript-Excel: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2006 Open World Ltd, Kevin Rogers
4 //
5 // This file is part of MillScript-Excel.
6 //
7 // MillScript-Excel is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript-Excel is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript-Excel; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.office.excel.records.syntax;
22
23 import org.millscript.office.excel.RecordSyntax;
24 import org.millscript.office.excel.RecordTokenizer;
25 import org.millscript.office.excel.alerts.BIFFAlert;
26 import org.millscript.office.excel.records.Bitmap;
27 import org.millscript.office.excel.versions.BIFF8;
28 import org.millscript.office.excel.versions.BIFF8X;
29
30 /**
31 *
32 */
33 public class BitmapRecordSyntax extends RecordSyntax implements BIFF8, BIFF8X {
34
35 private static void checkValue( final int expected, final int found ) {
36 if ( expected != found ) {
37 throw new BIFFAlert(
38 "Unexpected value in BITMAP record"
39 ).culprit( "expected", expected ).culprit( "found", found ).mishap();
40 }
41 }
42
43 /**
44 * @see org.millscript.office.excel.RecordSyntax#newRecord(RecordTokenizer)
45 */
46 @Override
47 public Bitmap newRecord( final RecordTokenizer tokenizer ) {
48 // Validation as per specification - Unknown value
49 checkValue( 0x0009, tokenizer.read2ByteChar() );
50 // Validation as per specification - Unknown value
51 checkValue( 0x0001, tokenizer.read2ByteChar() );
52 // Read in the total size of the data
53 final int totalSize = tokenizer.read4ByteInt();
54 // Validation as per specification - Unknown value
55 checkValue( 0x000C, tokenizer.read2ByteChar() );
56 // Validation as per specification - Unknown value
57 checkValue( 0x0000, tokenizer.read2ByteChar() );
58 // Read in the width and height of the picture
59 final int width = tokenizer.read2ByteInt();
60 final int height = tokenizer.read2ByteInt();
61 // Validation as per specification - Numer of planes
62 checkValue( 0x0001, tokenizer.read2ByteChar() );
63 // Validation as per specification - Colour depth
64 checkValue( 0x0018, tokenizer.read2ByteChar() );
65 // Initialise the pixel data
66 final byte[] rawData = tokenizer.readBytesLeftInCurrentRecordData();
67 // Copy all the data from this record. Note that this will probably not
68 // be all the pixel data, as it's very likely this will require several
69 // CONTINUE records to contain it all...
70 return new Bitmap( height, width, rawData );
71 }
72
73 }