sadira/dialogs/fits.js

Web framework

var SRZ=require('../www/js/serializer.js');
var fits = require('../../node-fits/build/Release/fits.node');


var layer_defaults = [ 
    {
	colormap : [[0,0,0,1,0],
		    [.5,0.0,1.0,.5,1.0]],
	cuts : []
    },
    {
	colormap : [[0,0,0,1,0],
		    [1.0,1.0,0.0,1.0,1.0]],
	cuts : []
    },
    {
	colormap : [[0,0,0,1,0],
		    [0.0,1.0,1.0,1.0,1.0]],
	cuts : []
    },
    {
	colormap : [[0,0,0,1,0],
		    [1.0,0.0,0.0,1.0,1.0]],
	cuts : []
    }
];

dialog_handlers.fits = {

    test_get_data : function (dlg, status_cb){
	
	var data_files = {
	    catseye : {
		multi_root : "./example_fits_files/multiband/Cat's Eye Nebula/",
		multi_files : [
		    ["hst_05403_01_wfpc2_f953n_pc_sci.fits","Filter 953nm"],
		    ["hst_05403_01_wfpc2_f658n_pc_sci.fits","Filter 658nm"],
		    ["hst_05403_01_wfpc2_f588n_pc_sci.fits","Filter 588nm"],
		    ["hst_05403_01_wfpc2_f631n_pc_sci.fits","Filter 631nm"],
		    ["hst_05403_01_wfpc2_f673n_pc_sci.fits","Filter 673nm"]
		],
		crop : {x: 220, y: 220, w:512, h:512},
		du : 1
		
	    },
	    M42 : {
		multi_root : "./example_fits_files/multiband/M42/",
		multi_files : [ 
		    ["m42_40min_red.fits","Hubble Red"],
		    ["m42_40min_ir.fits","Hubble InfraRed"]
		]
	    }
	};

	console.log("DLG header : " + JSON.stringify(dlg.header));
	
	var what = dlg.header.what;

	status_cb();
	
	//dlg.send_datagram({type : "tags", tags: multi_files}, null, function(error){});

	dlg.listen("get_data", function(dgram){

	    var imgid=dgram.header.imgid;
	    var df=data_files[what];

	    var file_name=df.multi_root+df.multi_files[dgram.header.imgid][0];
	    console.log("Sending imgid " + imgid + " : " + file_name);

	    var f = new fits.file(file_name);
	    //f.file_name="./example_fits_files/m42_40min_red.fits"
	    //f.file_name="./example_fits_files/example.fits";
	    
	    if(typeof df.du != 'undefined')
		f.set_hdu(df.du);
	    
	    console.log("read du  image ...");
	    f.read_image_hdu(function(error, image){

		if(error != null){
		    console.log("Error read image " + error);
		    return;
		}

		if(typeof df.crop != 'undefined'){
		    console.log("Cropping");
		    image.crop({x: 220, y: 220, w:512, h:512});
		}
		//image.crop({ w:1024, h:1024});
		//image.crop({ w:2048, h:2048});


		console.log("Getting data");
		var data=image.get_data();
		
		console.log("OK, Loaded " + typeof(image));
		
		// var data=new Buffer(64); //image.get_data();
		// var dv
		// data.writeFloatLE(3.14, 0);
		// data.writeFloatLE(2.00, 4);
		
		// console.log("Loaded image....DATA = "+ data);
		
		console.log("FIRST DATA IS " + data[0] + ", "+ data[1000]);
		var srep=new SRZ.srz_mem(data);
		srep.header={width : image.width(), height: image.height(), name : data_files[what].multi_files[imgid][1],
			     colormap : layer_defaults[imgid].colormap,
			     cuts : layer_defaults[imgid].cuts,
			    };
		//srep.header={width : 512, height: 512 };
		
		console.log("SRZ configured size= " + srep.size());
		
		srep.on_done=function(){
		    console.log("Image data sent!");
		    //dlg.close();
		};
		
		dlg.srz_initiate(srep, function(error){
		    if(error) console.log("SRZ error : " + error);
		});
		
		
	    });
	});
	    
    },

    test_get_multi_data : function (dlg, status_cb){
	


	var f = new fits.file();
	f.file_name="./example_fits_files/example.fits";
	f.read_image_hdu(function(error, image){

	    if(error != null)
		return status_cb(error);
	    else
		status_cb();

	    console.log("Loaded image....");

	    var data=image.get_data();

	    // var data=new Buffer(64); //image.get_data();
	    // var dv
	    // data.writeFloatLE(3.14, 0);
	    // data.writeFloatLE(2.00, 4);

	   // console.log("Loaded image....DATA = "+ data);

	    //console.log("FIRST DATA IS " + data[0] + ", "+ data[1]);
	    var srep=new SRZ.srz_mem(data);
	    srep.header={width : image.width(), height: image.height() };

	    console.log("SRZ configured size= " + srep.size());

	    srep.on_done=function(){
		console.log("Image data sent!");
		dlg.close();
	    };
	    
	    dlg.srz_initiate(srep, function(error){
		if(error) console.log("SRZ error : " + error);
	    });
	    
	    
	});
	
    }

}