19 lines
742 B
Plaintext
19 lines
742 B
Plaintext
import type { Font } from 'fontkit';
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import type { AdjustFontFallback } from 'next/font';
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/**
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* Given a font file and category, calculate the fallback font override values.
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* The returned values can be used to generate a CSS @font-face declaration.
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*
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* For example:
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* @font-face {
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* font-family: local-font;
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* src: local(Arial);
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* size-adjust: 90%;
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* }
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*
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* Read more about this technique in these texts by the Google Aurora team:
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* https://developer.chrome.com/blog/font-fallbacks/
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* https://docs.google.com/document/d/e/2PACX-1vRsazeNirATC7lIj2aErSHpK26hZ6dA9GsQ069GEbq5fyzXEhXbvByoftSfhG82aJXmrQ_sJCPBqcx_/pub
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*/
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export declare function getFallbackMetricsFromFontFile(font: Font, category?: string): AdjustFontFallback;
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