7a664ca3e8
Merging this separately so the commit with the tooling change is readable. This is a follow-on to #1167 which turned prettier on.
44 lines
1.1 KiB
JavaScript
44 lines
1.1 KiB
JavaScript
'use strict'
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const gm = require('gm')
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const LruCache = require('./lru-cache')
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const imageMagick = gm.subClass({ imageMagick: true })
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// The following is an arbitrary limit (~1.5MB, 1.5kB/image).
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const imgCache = new LruCache(1000)
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function svgToImg(svg, format) {
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return new Promise((resolve, reject) => {
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const cacheIndex = format + svg
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if (imgCache.has(cacheIndex)) {
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// We own a cache for this svg conversion.
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const result = imgCache.get(cacheIndex)
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resolve(result)
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return
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}
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const buf = Buffer.from(
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'<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' + svg
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)
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imageMagick(buf, 'image.' + format)
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.density(90)
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.background(format === 'jpg' ? '#FFFFFF' : 'none')
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.flatten()
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.toBuffer(format, (err, data) => {
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if (err) {
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reject(err)
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} else {
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imgCache.set(cacheIndex, data)
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resolve(data)
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}
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})
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})
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}
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module.exports = svgToImg
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// To simplify testing.
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module.exports._imgCache = imgCache
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module.exports._imageMagick = imageMagick
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