15 lines
422 B
TypeScript
15 lines
422 B
TypeScript
/**
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* @license MIT
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* Copyright (c) 2018 The xterm.js authors. All rights reserved.
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*/
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import { IColor } from 'browser/Types';
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export function getLuminance(color: IColor): number {
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// Coefficients taken from: https://www.w3.org/TR/AERT/#color-contrast
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const r = color.rgba >> 24 & 0xff;
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const g = color.rgba >> 16 & 0xff;
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const b = color.rgba >> 8 & 0xff;
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return (0.299 * r + 0.587 * g + 0.114 * b) / 255;
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}
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