41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
const magick = require("../build/Release/image.node");
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const { isMainThread, parentPort, workerData } = require("worker_threads");
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exports.run = object => {
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return new Promise((resolve, reject) => {
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// If the image has a path, it must also have a type
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if (object.path) {
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if (object.type !== "image/gif" && object.onlyGIF) resolve({
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buffer: Buffer.alloc(0),
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fileExtension: "nogif"
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});
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}
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// Convert from a MIME type (e.g. "image/png") to something ImageMagick understands (e.g. "png").
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// Don't set `type` directly on the object we are passed as it will be read afterwards.
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// If no image type is given (say, the command generates its own image), make it a PNG.
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const fileExtension = object.type ? object.type.split("/")[1] : "png";
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const objectWithFixedType = Object.assign({}, object, {type: fileExtension});
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magick[object.cmd](objectWithFixedType, (error, data, type) => {
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if (error) reject(error);
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const returnObject = {
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buffer: data,
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fileExtension: type
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};
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resolve(returnObject);
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});
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});
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};
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if (!isMainThread) {
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this.run(workerData)
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.then(returnObject => {
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parentPort.postMessage(returnObject);
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process.exit();
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return;
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})
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.catch(err => {
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// turn promise rejection into normal error
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throw err;
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});
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}
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