75 lines
2.1 KiB
JavaScript
75 lines
2.1 KiB
JavaScript
const loaderUtils = require('loader-utils')
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const { requirePeer } = require('../lib/util')
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module.exports = function loader(contentBuffer) {
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this.cacheable && this.cacheable()
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const callback = this.async()
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let content = contentBuffer.toString('utf8')
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// image file path
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const path = this.resourcePath
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// user options
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const config = {
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sharp: false,
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graphicsMagick: false,
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size: 9,
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...loaderUtils.getOptions(this)
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}
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/** @see https://github.com/zouhir/lqip-loader */
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const contentIsUrlExport = /^module.exports = "data:(.*)base64,(.*)/.test(
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content
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)
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const contentIsFileExport = /^module.exports = (.*)/.test(content)
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let source = ''
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if (contentIsUrlExport) {
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source = content.match(/^module.exports = (.*)/)[1]
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} else {
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if (!contentIsFileExport) {
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const fileLoader = require('file-loader')
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content = fileLoader.call(this, contentBuffer)
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}
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source = content.match(/^module.exports = (.*);/)[1]
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}
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function createModule ({ data, info, type }) {
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const result = {
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lazySrc: `data:image/${type};base64,` + data.toString('base64'),
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aspect: info.width / info.height,
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}
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callback(
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null,
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`module.exports = {src:${source},` + JSON.stringify(result).slice(1)
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)
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}
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if (config.sharp) {
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const sharpImg = requirePeer('sharp')(path)
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sharpImg
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.jpeg({ quality: 10 })
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.resize(config.size)
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.toBuffer({ resolveWithObject: true })
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.then(({ data, info }) => createModule({ data, info, type: 'jpeg' }))
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.catch(err => callback(err))
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} else {
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const gm = requirePeer('gm').subClass({ imageMagick: !config.graphicsMagick })
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const extension = path.split('.').pop().toLowerCase()
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if (!['gif', 'png', 'jpg', 'jpeg'].includes(extension)) {
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return callback(new Error('vuetify-loader does not support this file type (' + extension + ')'))
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}
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gm(extension + ':' + path).size(function(err, info) {
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if (err) callback(err)
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else this.resize(config.size).toBuffer('gif', (err, data) => {
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if (err) console.error(err)
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else createModule({ data, info, type: 'gif' })
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})
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})
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}
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}
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module.exports.raw = true
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