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