OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [gnu/] [javax/] [imageio/] [png/] [PNGPalette.java] - Blame information for rev 769

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 769 jeremybenn
/* PNGPalette.java --
2
   Copyright (C) 2006 Free Software Foundation
3
 
4
This file is part of GNU Classpath.
5
 
6
GNU Classpath is free software; you can redistribute it and/or modify
7
it under the terms of the GNU General Public License as published by
8
the Free Software Foundation; either version 2, or (at your option)
9
any later version.
10
 
11
GNU Classpath is distributed in the hope that it will be useful, but
12
WITHOUT ANY WARRANTY; without even the implied warranty of
13
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
General Public License for more details.
15
 
16
You should have received a copy of the GNU General Public License
17
along with GNU Classpath; see the file COPYING.  If not, write to the
18
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19
02110-1301 USA.
20
 
21
Linking this library statically or dynamically with other modules is
22
making a combined work based on this library.  Thus, the terms and
23
conditions of the GNU General Public License cover the whole
24
combination.
25
 
26
As a special exception, the copyright holders of this library give you
27
permission to link this library with independent modules to produce an
28
executable, regardless of the license terms of these independent
29
modules, and to copy and distribute the resulting executable under
30
terms of your choice, provided that you also meet, for each linked
31
independent module, the terms and conditions of the license of that
32
module.  An independent module is a module which is not derived from
33
or based on this library.  If you modify this library, you may extend
34
this exception to your version of the library, but you are not
35
obligated to do so.  If you do not wish to do so, delete this
36
exception statement from your version. */
37
 
38
package gnu.javax.imageio.png;
39
 
40
import java.awt.color.ColorSpace;
41
import java.awt.image.IndexColorModel;
42
 
43
/**
44
 * A PNG Palette chunk.
45
 */
46
public class PNGPalette extends PNGChunk
47
{
48
  private int[] red,green,blue;
49
 
50
  protected PNGPalette( int type, byte[] data, int crc ) throws PNGException
51
  {
52
    super( type, data, crc );
53
    double l = data.length;
54
    l /= 3.0;
55
    // Check if it's divisible by 3. (Yuck.)
56
    if( l - Math.floor(l) != 0.0 )
57
      throw new PNGException("Invalid size of palette chunk.");
58
    int nEntries = (int)l;
59
 
60
    red = new int[ nEntries ];
61
    green = new int[ nEntries ];
62
    blue = new int[ nEntries ];
63
    for( int i = 0; i < nEntries; i++ )
64
      {
65
        red[i] = (data[ i * 3 ] & 0xFF);
66
        green[i] = (data[ i * 3 + 1 ] & 0xFF);
67
        blue[i] = (data[ i * 3 + 2] & 0xFF);
68
      }
69
  }
70
 
71
  public PNGPalette( IndexColorModel cm )
72
  {
73
    super( TYPE_PALETTE );
74
    int n = cm.getMapSize();
75
    data = new byte[ n * 3 ];
76
    red = new int[ n ];
77
    green = new int[ n ];
78
    blue = new int[ n ];
79
    for(int i = 0; i < n; i++ )
80
      {
81
        red[i] = data[i * 3] = (byte)cm.getRed(i);
82
        green[i] = data[i * 3 + 1] = (byte)cm.getGreen(i);
83
        blue[i] = data[i * 3 + 2] = (byte)cm.getBlue(i);
84
      }
85
  }
86
 
87
  public IndexColorModel getPalette( ColorSpace cs )
88
  {
89
    int nc = red.length;
90
    byte[] r = new byte[nc];
91
    byte[] g = new byte[nc];
92
    byte[] b = new byte[nc];
93
 
94
    if( cs == null )
95
      {
96
        for(int i = 0; i < nc; i ++ )
97
          {
98
            r[i] = (byte)red[i];
99
            g[i] = (byte)green[i];
100
            b[i] = (byte)blue[i];
101
          }
102
      }
103
    else
104
      {
105
        for(int i = 0; i < nc; i ++ )
106
          {
107
            float[] in = new float[3];
108
            in[0] = (((float)red[i]) / 255f);
109
            in[1] = (((float)green[i]) / 255f);
110
            in[2] = (((float)blue[i]) / 255f);
111
            float[] out = cs.toRGB( in );
112
            r[i] = (byte)( Math.round(out[0] * 255.0) );
113
            g[i] = (byte)( Math.round(out[1] * 255.0) );
114
            b[i] = (byte)( Math.round(out[2] * 255.0) );
115
          }
116
      }
117
    return new IndexColorModel(8, nc, r, g, b);
118
  }
119
 
120
  public String toString()
121
  {
122
    String s = "PNG Palette:\n";
123
    for( int i = 0; i < red.length; i++)
124
      s = s + "Index " + i + ": ["+ red[i] +", "+green[i]+", "+blue[i]+"]\n";
125
    return s;
126
  }
127
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.