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index.js
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index.js
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const Canvas = require('./lib/canvas')
const Image = require('./lib/image')
const CanvasRenderingContext2D = require('./lib/context2d')
const parseFont = require('./lib/parse-font')
const packageJson = require('./package.json')
const bindings = require('./lib/bindings')
const fs = require('fs')
const PNGStream = require('./lib/pngstream')
const PDFStream = require('./lib/pdfstream')
const JPEGStream = require('./lib/jpegstream')
const DOMMatrix = require('./lib/DOMMatrix').DOMMatrix
const DOMPoint = require('./lib/DOMMatrix').DOMPoint
function createCanvas (width, height, type) {
return new Canvas(width, height, type)
}
function createImageData (array, width, height) {
return new bindings.ImageData(array, width, height)
}
function loadImage (src) {
return new Promise((resolve, reject) => {
const image = new Image()
function cleanup () {
image.onload = null
image.onerror = null
}
image.onload = () => { cleanup(); resolve(image) }
image.onerror = (err) => { cleanup(); reject(err) }
image.src = src
})
}
/**
* Resolve paths for registerFont. Must be called *before* creating a Canvas
* instance.
* @param src {string} Path to font file.
* @param fontFace {{family: string, weight?: string, style?: string}} Object
* specifying font information. `weight` and `style` default to `"normal"`.
*/
function registerFont (src, fontFace) {
// TODO this doesn't need to be on Canvas; it should just be a static method
// of `bindings`.
return Canvas._registerFont(fs.realpathSync(src), fontFace)
}
module.exports = {
Canvas,
Context2d: CanvasRenderingContext2D, // Legacy/compat export
CanvasRenderingContext2D,
CanvasGradient: bindings.CanvasGradient,
CanvasPattern: bindings.CanvasPattern,
Image,
ImageData: bindings.ImageData,
PNGStream,
PDFStream,
JPEGStream,
DOMMatrix,
DOMPoint,
registerFont,
parseFont,
createCanvas,
createImageData,
loadImage,
backends: bindings.Backends,
/** Library version. */
version: packageJson.version,
/** Cairo version. */
cairoVersion: bindings.cairoVersion,
/** jpeglib version. */
jpegVersion: bindings.jpegVersion,
/** gif_lib version. */
gifVersion: bindings.gifVersion ? bindings.gifVersion.replace(/[^.\d]/g, '') : undefined,
/** freetype version. */
freetypeVersion: bindings.freetypeVersion
}