openjpeg/applications/jpip/util/opj_viewer/src/PnmImage.java

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/*
* $Id$
*
* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2011, Professor Benoit Macq
* Copyright (c) 2010-2011, Kaori Hagihara
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.util.regex.*;
public class PnmImage extends Component
{
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private byte[] data = null;
private int width = 0;
private int height = 0;
private int channel = 0;
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public PnmImage( int c, int w, int h)
{
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channel = c;
width = w;
height = h;
data = new byte [ w*h*c];
}
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public PnmImage( String filename)
{
String str;
Pattern pat;
Matcher mat;
int bytes;
int r, offset = 0;
try {
FileInputStream fis = new FileInputStream( new File(filename));
DataInputStream is = new DataInputStream( fis);
pat = Pattern.compile("^P([56])$");
mat = pat.matcher(str = is.readLine());
if( !mat.matches()){
System.out.println("PNM header format error");
return;
}
if( (mat.group(1)).compareTo("5") == 0)
channel = 1;
else
channel = 3;
pat = Pattern.compile("^(\\d+) (\\d+)$");
mat = pat.matcher(str = is.readLine());
if( !mat.matches()){
System.out.println("PNM header format error");
return;
}
width = Integer.parseInt( mat.group(1));
height = Integer.parseInt( mat.group(2));
str = is.readLine(); // 255
bytes = width*height*channel;
data = new byte[bytes];
while( bytes > 0){
try {
r = is.read(data, offset, bytes);
if( r == -1){
System.err.println(" failed to read()");
break;
}
offset += r;
bytes -= r;
}
catch (IOException e) { e.printStackTrace(); }
}
fis.close();
} catch (IOException e) { e.printStackTrace(); }
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}
public byte [] get_data(){ return data;}
public int get_width() { return width;}
public int get_height(){ return height;}
public Image createROIImage( int rx, int ry, int rw, int rh)
{
int []pix = new int[ rw*rh];
for( int i=0; i<rh; i++)
for( int j=0; j<rw; j++){
pix[i*rw+j] = 0xFF << 24; // transparency
if( channel == 1){
Byte lum = data[(ry+i)*width+rx+j];
short slum;
if( lum < 0)
slum = (short)(2*128+lum);
else
slum = (short)lum;
for( int c=0; c<3; c++){
pix[i*rw+j] = pix[i*rw+j] | slum << (8*c);
}
}
else
for( int c=0; c<3; c++){
Byte lum = data[ ((ry+i)*width+rx+j)*channel+(2-c)];
short slum;
if( lum < 0)
slum = (short)(2*128+lum);
else
slum = (short)lum;
pix[i*rw+j] = pix[i*rw+j] | slum << (8*c);
}
}
return createImage(new MemoryImageSource( rw, rh, pix, 0, rw));
}
public Image createScaleImage( double scale)
{
Image src = createROIImage( 0, 0, width, height);
ImageFilter replicate = new ReplicateScaleFilter( (int)(width*scale), (int)(height*scale));
ImageProducer prod = new FilteredImageSource( src.getSource(), replicate);
return createImage(prod);
}
}