David Haberthür
110 lines
3.9 KiB
Java
110 lines
3.9 KiB
Java
import ij.plugin.*;
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import java.awt.*;
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import java.io.*;
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import ij.*;
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import ij.io.*;
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import ij.process.*;
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import ij.measure.*;
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/** Opens and displays DMP images. */
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/** Adapted from a plugin called PDS_Reader.java from Mike Martin. */
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/** 21-SEP-2010 bernd.pinzer@psi.ch */
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public class DMP_Reader extends ImagePlus implements PlugIn {
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private static final String TITLE = "DMP Reader";
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private String directory, fileName;
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private DataInputStream f;
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private StringBuffer info = new StringBuffer(512);
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private double bscale, bzero;
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String keyword, value, line = "", sampleType, encodingType="",mapScale="";
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private int recordBytes,bitsPerPixel;
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public void run(String arg) {
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String path = getPath(arg);
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int islash = path.lastIndexOf('/');
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directory = path.substring(0, islash+1);
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fileName = path.substring(islash+1);
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if (fileName==null)
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return;
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IJ.showStatus("Opening: " + directory + fileName);
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FileInfo fi = null;
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try {
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fi = getInfo();
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} catch (IOException e) {
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IJ.showMessage(TITLE, ""+e);
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return;
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}
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if (fi!=null && fi.width>0 && fi.height>0) {
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FileOpener fo = new FileOpener(fi);
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ImagePlus imp = fo.open(false);
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ImageProcessor ip = imp.getProcessor();
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setProcessor(fileName, ip);
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if (arg.equals("")) show();
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} //else
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//IJ.error("This does not appear to be a PDS file.");
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IJ.showStatus("");
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}
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FileInfo getInfo() throws IOException {
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FileInfo fi = new FileInfo();
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fi.fileName = fileName;
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fi.directory = directory;
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fi.width = 0;
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fi.height = 0;
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fi.offset = 6;
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//BufferedReader f = new BufferedReader(new FileReader(directory+fileName));
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InputStream is = new FileInputStream(directory+fileName);
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byte[] buf = new byte[6]; // we're about to read the first 6 bytes
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is.read(buf, 0, 6);
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//one reason I hate java: there's no such thing as a uint16 data
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//type. To work around this, we have to do some gymnastics:
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int firstByte = 0;
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int secondByte = 0;
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firstByte = (0x000000FF & ((int)buf[0]));
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secondByte = (0x000000FF & ((int)buf[1]));
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fi.width = (secondByte << 8 | firstByte);
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// because I never could remember that even a single day, here
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// are some explanations:
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// first we are promoting a signed byte to an int, which
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// results in bits 8 through 31 set to 1 if the number happens
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// to be larger than 127. the bitwise and with 0x000000FF wipes
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// out all but the first 8 bits.
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// The last line deals with endianness: the binary file is
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// little endian, while java is in general big endian.
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//System.out.println(fi.width);
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firstByte = (0x000000FF & ((int)buf[2]));
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secondByte = (0x000000FF & ((int)buf[3]));
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fi.height = (secondByte << 8 | firstByte);
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//System.out.println(fi.height);
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fi.fileType = FileInfo.GRAY32_FLOAT;
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fi.intelByteOrder = true;
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fi.valueUnit = "gray value";
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return fi;
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} // setting the FileInfo
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private String getPath(String arg) {
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if (null != arg) {
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if (new File(arg).exists()) return arg;
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}
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// else, ask:
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OpenDialog od = new OpenDialog("Choose a .DMP file", null);
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String dir = od.getDirectory();
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if (null == dir) return null; // dialog was canceled
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dir = dir.replace('\\', '/'); // Windows safe
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if (!dir.endsWith("/")) dir += "/";
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return dir + od.getFileName();
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}
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} // end of DMP reader class
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