cornerstone-tools-cacalc
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Medical imaging tools for the Cornerstone library with added functionality for computing Agatston calcium scores
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<h1 class="page-title">util/setContextToDisplayFontSize.js</h1>
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<pre class="prettyprint source linenums"><code>import * as cornerstone from '../cornerstone-core.js';
/**
* Sets the canvas context transformation matrix so it is scaled to show text
* more cleanly even if the image is scaled up. See
* https://github.com/chafey/cornerstoneTools/wiki/DrawingText
* for more information
*
* @param enabledElement
* @param context
* @param fontSize
* @returns {{fontSize: number, lineHeight: number, fontScale: number}}
*/
export default function (enabledElement, context, fontSize) {
const fontScale = 0.1;
cornerstone.setToPixelCoordinateSystem(enabledElement, context, fontScale);
// Return the font size to use
const scaledFontSize = fontSize / enabledElement.viewport.scale / fontScale;
// TODO: actually calculate this?
const lineHeight = fontSize / enabledElement.viewport.scale / fontScale;
return {
fontSize: scaledFontSize,
lineHeight,
fontScale
};
}
</code></pre>
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