/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.libraries.pixie.wmf.bitmap;
import java.io.IOException;
import java.io.InputStream;
public class GDIPalette {
private int noColors;
private int[] colors;
public GDIPalette() {
}
public void setNoOfColors( final int colors ) {
this.noColors = colors;
}
public void setNoOfImportantColors( final int colors ) {
if ( colors > noColors ) {
throw new IllegalArgumentException(
"There may be not more important colors than colors defined in the palette." );
}
}
public void readPalette( final InputStream in )
throws IOException {
colors = new int[ noColors ];
for ( int i = 0; i < noColors; i++ ) {
colors[ i ] = readNextColor( in );
}
}
private int readNextColor( final InputStream in )
throws IOException {
final int b = in.read();
final int g = in.read();
final int r = in.read();
//final int filler =
//noinspection ResultOfMethodCallIgnored
in.read();
return b + ( g << 8 ) + ( r << 16 );
}
public int lookupColor( final int color ) {
if ( noColors == 0 ) {
// Convert from BGR (windows) format to RGB (java) format
final int b = ( color & 0x00ff0000 ) >> 16;
final int g = ( color & 0x0000ff00 );
final int r = ( color & 0x000000ff );
return b + g + ( r << 16 );
}
return colors[ color ];
}
}