js-dicom/src/ImageUtility/loadDataSet.js

this is js-dicom

import $ from 'jquery';
import loadFile from '../FileUtility/loadFile';
//import * as dicomParser from 'dicom-parser';
import  *  as dicomParser  from '../dicomParser/index';
import loadImage from './loadImage';
import getDefaultViewport from './getDefaultViewport';


const loadDataSet = function (file, frame) {
    const deferred = $.Deferred();
    loadFile(file).then(function (result) {
        var byteArray = new Uint8Array(result);
        let dicom = {
            frame: undefined,
            dataSet: undefined,
            image: undefined
        };
        dicom.frame = frame;
        dicom.dataSet = dicomParser.parseDicom(byteArray);
        dicom.image = loadImage(dicom.dataSet, frame);
        deferred.resolve(dicom);
    }).catch(function (error) {
        deferred.reject(error);
    });
    return deferred.promise();
};


const renderImage = function (image, canvas) {

    if (!image) {
        return;
    }
    canvas = canvas || document.createElement('canvas');
    var el = {
        //element: element,
        canvas: canvas,
        image: image, // will be set once image is loaded
        invalid: false,     // true if image needs to be drawn, false if not
        needsRedraw: true,
        data: {}
    };


    if (el.needsRedraw && el.image !== undefined) {
        el.canvas.width = el.image.width;
        el.canvas.height = el.image.height;
        el.viewport = getDefaultViewport(el.canvas, el.image)
        el.image.render(el, el.invalid);
    }
    return el.canvas;
};


export {loadDataSet, renderImage};