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Limit IIIF tile source percentages to 10 decimals max

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IIIF Image API versions 1 and 2 recommend limiting the number of
decimals digits to 10 at most.
This commit is contained in:
Lutz Helm
2019-03-14 11:29:14 +01:00
committed by Lutz Helm
parent 66b41a53b8
commit 58efe1f850
1 changed files with 8 additions and 5 deletions
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13
src/ol/source/IIIF.js
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@@ -34,6 +34,9 @@ import TileImage from './TileImage.js';
* @property {boolean} [wrapX=false]
*/
function formatPercentage(percentage) {
return percentage.toLocaleString('en', {maximumFractionDigits: 10});
}
/**
* @classdesc
@@ -191,10 +194,10 @@ class IIIF extends TileImage {
} else if (!supportsArbitraryTiling || features.includes('regionByPx')) {
regionParam = regionX + ',' + regionY + ',' + regionW + ',' + regionH;
} else if (features.includes('regionByPct')) {
const pctX = regionX / width * 100,
pctY = regionY / height * 100,
pctW = regionW / width * 100,
pctH = regionH / height * 100;
const pctX = formatPercentage(regionX / width * 100),
pctY = formatPercentage(regionY / height * 100),
pctW = formatPercentage(regionW / width * 100),
pctH = formatPercentage(regionH / height * 100);
regionParam = 'pct:' + pctX + ',' + pctY + ',' + pctW + ',' + pctH;
}
if (version == Versions.VERSION3 && (!supportsArbitraryTiling || features.includes('sizeByWh'))) {
@@ -206,7 +209,7 @@ class IIIF extends TileImage {
} else if (features.includes('sizeByWh')) {
sizeParam = sizeW + ',' + sizeH;
} else if (features.includes('sizeByPct')) {
sizeParam = 'pct:' + (100 / scale);
sizeParam = 'pct:' + formatPercentage(100 / scale);
}
} else {
regionParam = 'full';