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import cds.aladin.*;
public class BytePixelPlug extends AladinPlugin {
public String menu() { return "Image dump & reverse"; }
public String description() {
return "PLUGIN TUTORIAL:\n" +
"This plugin is an example for manipulating the byte pixel buffer.\n" +
"It will create a copy of current plane image, and will reverse" +
"all pixels.\n\n" +
"This plugin can be launched by script via the \"inverse\" command.";
}
public String author() { return "Pierre Fernique [CDS]"; }
public String version() { return "1.1 - January 2007"; }
public String url() { return "http://aladin.u-strasbg.fr/java/Plugins/BytePixelPlug.java"; }
public String category() { return "Plugin tutorial/Image"; }
public String scriptCommand() { return "inverse"; }
/**
* 1) Clone image plane via VOAPP
* 2) Access to the Aladin byte pixel buffer of this plane
* 3) Modify these pixels (inverse)
* 4) Notify Aladin that the byte pixels has been modified => lost the full pixel access
*/
public void exec() {
try {
// Dump the plane of the current image
String labelImg = aladin.getAladinImage().getLabel();
aladin.execCommand("copy "+labelImg+" copyOf"+labelImg);
// Direct access to the byte pixel buffer of the copied image
AladinData sd = aladin.getAladinData("copyOf"+labelImg);
byte pix [] = sd.seeBytePixels();
// Inverse each of them
for( int i=0; i<pix.length; i++ ) pix[i] = (byte) ~(0xFF & pix[i]);
// Notify Aladin
sd.bytePixelsModified();
} catch( AladinException e ) { aladin.warning("Plugin error: "+e.getMessage()); }
}
}
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