@cleerlycode/cornerstone-wado-image-loader

<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/imageLoader/createImage.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../../index.html">all files</a> / <a href="index.html">src/imageLoader/</a> createImage.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 37.78% Statements 34/90 </div> <div class='fl pad1y space-right2'> 52.94% Branches 27/51 </div> <div class='fl pad1y space-right2'> 50% Functions 5/10 </div> <div class='fl pad1y space-right2'> 37.93% Lines 33/87 </div> </div> </div> <div class='status-line low'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228</td><td class="line-coverage quiet">                6×                                                                                         9×   9× 8×     8×     1×         10× 1×     9× 9× 9× 9×             36×   9× 9× 9× 9× 9× 9× 9×       9× 9×     9×                                             9×                                                                     9×                     9×       9×                                 9×       9×                 9×             9×           9×               9×            </td><td class="text"><pre class="prettyprint lang-js">import { external } from '../externalModules.js'; import getImageFrame from './getImageFrame.js'; import decodeImageFrame from './decodeImageFrame.js'; import isColorImageFn from './isColorImage.js'; import convertColorSpace from './convertColorSpace.js'; import getMinMax from '../shared/getMinMax.js'; import isJPEGBaseline8BitColor from './isJPEGBaseline8BitColor.js';   let lastImageIdDrawn = '';   function isModalityLUTForDisplay(sopClassUid) { // special case for XA and XRF // https://groups.google.com/forum/#!searchin/comp.protocols.dicom/Modality$20LUT$20XA/comp.protocols.dicom/UBxhOZ2anJ0/D0R_QP8V2wIJ return ( sopClassUid !== '1.2.840.10008.5.1.4.1.1.12.1' && // XA sopClassUid !== '1.2.840.10008.5.1.4.1.1.12.2.1' ); // XRF }   function convertToIntPixelData(floatPixelData) { const floatMinMax = getMinMax(floatPixelData); const floatRange = Math.abs(floatMinMax.max - floatMinMax.min); const intRange = 65535; const slope = floatRange / intRange; const intercept = floatMinMax.min; const numPixels = floatPixelData.length; const intPixelData = new Uint16Array(numPixels); let min = 65535; let max = 0;   for (let i = 0; i < numPixels; i++) { const rescaledPixel = Math.floor((floatPixelData[i] - intercept) / slope);   intPixelData[i] = rescaledPixel; min = Math.min(min, rescaledPixel); max = Math.max(max, rescaledPixel); }   return { min, max, intPixelData, slope, intercept }; }   /** * Helper function to set pixel data to the right typed array. This is needed because web workers * can transfer array buffers but not typed arrays * @param imageFrame */ function setPixelDataType(imageFrame) { Iif (imageFrame.bitsAllocated === 32) { imageFrame.pixelData = new Float32Array(imageFrame.pixelData); } else if (imageFrame.bitsAllocated === 16) { Iif (imageFrame.pixelRepresentation === 0) { imageFrame.pixelData = new Uint16Array(imageFrame.pixelData); } else { imageFrame.pixelData = new Int16Array(imageFrame.pixelData); } } else { imageFrame.pixelData = new Uint8Array(imageFrame.pixelData); } }   function createImage (imageId, pixelData, transferSyntax, options) { if (!pixelData || !pixelData.length) { return Promise.reject(new Error('The file does not contain image data.')); }   const cornerstone = external.cornerstone; const canvas = document.createElement('canvas'); const imageFrame = getImageFrame(imageId); const decodePromise = decodeImageFrame( imageFrame, transferSyntax, pixelData, canvas, options ); const getMetaData = key => cornerstone.metaData.get(key, imageId) || {};   return new Promise((resolve, reject) => { decodePromise.then(imageFrame => { const imagePlaneModule = getMetaData('imagePlaneModule'); const voiLutModule = getMetaData('voiLutModule'); const modalityLutModule = getMetaData('modalityLutModule'); const sopCommonModule = getMetaData('sopCommonModule'); const isColorImage = isColorImageFn(imageFrame.photometricInterpretation);   // JPEGBaseline (8 bits) is already returning the pixel data in the right format (rgba) // because it's using a canvas to load and decode images. Eif (!isJPEGBaseline8BitColor(imageFrame, transferSyntax)) { setPixelDataType(imageFrame);   // convert color space Iif (isColorImage) { // setup the canvas context canvas.height = imageFrame.rows; canvas.width = imageFrame.columns;   const context = canvas.getContext('2d'); const imageData = context.createImageData( imageFrame.columns, imageFrame.rows );   convertColorSpace(imageFrame, imageData); imageFrame.imageData = imageData; imageFrame.pixelData = imageData.data;   // calculate smallest and largest PixelValue of the converted pixelData const minMax = getMinMax(imageFrame.pixelData);   imageFrame.smallestPixelValue = minMax.min; imageFrame.largestPixelValue = minMax.max; } }   const image = { imageId, color: isColorImage, columnPixelSpacing: imagePlaneModule.pixelSpacing ? imagePlaneModule.pixelSpacing[1] : undefined, columns: imageFrame.columns, height: imageFrame.rows, intercept: modalityLutModule.rescaleIntercept ? modalityLutModule.rescaleIntercept : 0, invert: imageFrame.photometricInterpretation === 'MONOCHROME1', minPixelValue: imageFrame.smallestPixelValue, maxPixelValue: imageFrame.largestPixelValue, render: undefined, // set below rowPixelSpacing: imagePlaneModule.pixelSpacing ? imagePlaneModule.pixelSpacing[0] : undefined, rows: imageFrame.rows, sizeInBytes: imageFrame.pixelData.length, slope: modalityLutModule.rescaleSlope ? modalityLutModule.rescaleSlope : 1, width: imageFrame.columns, windowCenter: voiLutModule.windowCenter ? voiLutModule.windowCenter[0] : undefined, windowWidth: voiLutModule.windowWidth ? voiLutModule.windowWidth[0] : undefined, decodeTimeInMS: imageFrame.decodeTimeInMS, floatPixelData: undefined };   // add function to return pixel data Iif (imageFrame.pixelData instanceof Float32Array) { const floatPixelData = imageFrame.pixelData; const results = convertToIntPixelData(floatPixelData);   image.minPixelValue = results.min; image.maxPixelValue = results.max; image.slope = results.slope; image.intercept = results.intercept; image.floatPixelData = floatPixelData; image.getPixelData = () => results.intPixelData; } else { image.getPixelData = () => imageFrame.pixelData; }   // Setup the renderer Iif (image.color) { image.render = cornerstone.renderColorImage; image.getCanvas = function() { if (lastImageIdDrawn === imageId) { return canvas; }   canvas.height = image.rows; canvas.width = image.columns; const context = canvas.getContext('2d');   context.putImageData(imageFrame.imageData, 0, 0); lastImageIdDrawn = imageId;   return canvas; }; } else { image.render = cornerstone.renderGrayscaleImage; }   // Modality LUT Iif ( modalityLutModule.modalityLUTSequence && modalityLutModule.modalityLUTSequence.length > 0 && isModalityLUTForDisplay(sopCommonModule.sopClassUID) ) { image.modalityLUT = modalityLutModule.modalityLUTSequence[0]; }   // VOI LUT Iif ( voiLutModule.voiLUTSequence && voiLutModule.voiLUTSequence.length > 0 ) { image.voiLUT = voiLutModule.voiLUTSequence[0]; }   Iif (image.color) { image.windowWidth = 255; image.windowCenter = 127; }   // set the ww/wc to cover the dynamic range of the image if no values are supplied Iif (image.windowCenter === undefined || image.windowWidth === undefined) { const maxVoi = image.maxPixelValue * image.slope + image.intercept; const minVoi = image.minPixelValue * image.slope + image.intercept;   image.windowWidth = maxVoi - minVoi; image.windowCenter = (maxVoi + minVoi) / 2; }   resolve(image); }, reject); }); }   export default createImage;  </pre></td></tr> </table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="http://istanbul-js.org/" target="_blank">istanbul</a> at Sun Apr 01 2018 20:02:13 GMT+0800 (CST) </div> </div> <script src="../../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); } }; </script> <script src="../../sorter.js"></script> </body> </html>