mrmBot-Matrix/utils/gmbuffer.js

39 lines
1.4 KiB
JavaScript

// workaround for a gm bug where it doesn't output buffers properly
// https://github.com/aheckmann/gm/issues/572#issuecomment-293768810
module.exports = (data, format) => {
return new Promise((resolve, reject) => {
if (format) {
data.out("-layers", "optimize").stream(format, (err, stdout, stderr) => {
if (err) return reject(err);
const chunks = [];
stdout.on("data", (chunk) => {
chunks.push(chunk);
});
// these are 'once' because they can and do fire multiple times for multiple errors,
// but this is a promise so you'll have to deal with them one at a time
stdout.once("end", () => {
resolve(Buffer.concat(chunks));
});
stderr.once("data", (data) => {
reject(data.toString());
});
});
} else {
data.out("-layers", "optimize").stream((err, stdout, stderr) => {
if (err) return reject(err);
const chunks = [];
stdout.on("data", (chunk) => {
chunks.push(chunk);
});
// these are 'once' because they can and do fire multiple times for multiple errors,
// but this is a promise so you'll have to deal with them one at a time
stdout.once("end", () => {
resolve(Buffer.concat(chunks));
});
stderr.once("data", (data) => {
reject(data.toString());
});
});
}
});
};