53 lines
1.7 KiB
JavaScript
53 lines
1.7 KiB
JavaScript
// import kebabCase from 'lodash/kebabCase';
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export const getMeta = (image) => image.childImageSharp.fields.imageMeta;
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export const getName = (image) => getMeta(image)?.iptc.object_name || image.base;
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// some pleasing default colors for SSR and initial hydration
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export const getVibrant = (image) => getMeta(image)?.vibrant;
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export const hasName = (image) => Boolean(getMeta(image)?.iptc.object_name);
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export const getAspectRatio = (image) => image.childImageSharp.fluid.aspectRatio;
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export const getRgba = (palette, alpha) => `rgba(${palette[0]}, ${palette[1]}, ${palette[2]}, ${alpha || 1})`;
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// work around SSR bug in react-helmet
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export const getVibrantToHelmetSafeBodyStyle = (vibrant) => {
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const style = {
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'--muted': vibrant.Muted.rgb,
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'--dark-muted': vibrant.DarkMuted.rgb,
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'--light-muted': vibrant.LightMuted.rgb,
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'--vibrant': vibrant.Vibrant.rgb,
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'--dark-vibrant': vibrant.DarkVibrant.rgb,
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'--light-vibrant': vibrant.LightVibrant.rgb,
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};
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if (typeof window === 'undefined') {
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return style;
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}
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return Object.keys(style).map(key => `${(key)}: ${style[key]}`).join(';');
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};
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const gcd = (a, b) => {
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if (b < 0.0000001) {
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return a; // Since there is a limited precision we need to limit the value.
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}
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return gcd(b, Math.floor(a % b)); // Discard any fractions due to limitations in precision.
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};
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export const getShutterFractionFromExposureTime = (exposureTime) => {
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let fraction = exposureTime;
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var len = fraction.toString().length - 2;
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var denominator = Math.pow(10, len);
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var numerator = fraction * denominator;
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var divisor = gcd(numerator, denominator);
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numerator /= divisor;
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denominator /= divisor;
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return `${numerator}/${denominator}`;
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};
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