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47 lines
1.1 KiB
47 lines
1.1 KiB
5 years ago
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// decode any data in node
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'use strict'
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var clipPixels = require('clip-pixels')
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var cache = require('./cache')
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var decode = require('image-decode')
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module.exports = loadRaw
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function loadRaw (data, o) {
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var width = o.shape[0], height = o.shape[1]
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var clip = o.clip
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var type = o.type
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var decodedData = decode(data, type)
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if (!decodedData) {
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// cannot detect encoded data, consider it raw pixels
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if (!width || !height) throw new Error('Raw data requires options.width and options.height')
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}
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else {
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data = decodedData.data
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width = decodedData.width
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height = decodedData.height
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}
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var pixels = {
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// in order to avoid copying
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data: data.slice(),
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width: width,
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height: height
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}
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if (clip.x || clip.y ||
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(clip.width && clip.width !== pixels.width) ||
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(clip.height && clip.height !== pixels.height)
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) {
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pixels.data = new Uint8Array(clipPixels(data, [width, height], [clip.x, clip.y, clip.width, clip.height]))
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pixels.width = clip.width || width
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pixels.height = clip.height || height
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}
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if (o.cache) cache.set(o.cache, pixels)
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return Promise.resolve(pixels)
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}
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