49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
import JPEG from 'jpeg-js';
|
|
import { throwError, isNodePattern } from '@jimp/utils';
|
|
|
|
const MIME_TYPE = 'image/jpeg';
|
|
|
|
export default () => ({
|
|
mime: { [MIME_TYPE]: ['jpeg', 'jpg', 'jpe'] },
|
|
|
|
constants: {
|
|
MIME_JPEG: MIME_TYPE
|
|
},
|
|
|
|
decoders: {
|
|
[MIME_TYPE]: JPEG.decode
|
|
},
|
|
|
|
encoders: {
|
|
[MIME_TYPE]: image => JPEG.encode(image.bitmap, image._quality).data
|
|
},
|
|
|
|
class: {
|
|
// The quality to be used when saving JPEG images
|
|
_quality: 100,
|
|
/**
|
|
* Sets the quality of the image when saving as JPEG format (default is 100)
|
|
* @param {number} n The quality to use 0-100
|
|
* @param {function(Error, Jimp)} cb (optional) a callback for when complete
|
|
* @returns {Jimp} this for chaining of methods
|
|
*/
|
|
quality(n, cb) {
|
|
if (typeof n !== 'number') {
|
|
return throwError.call(this, 'n must be a number', cb);
|
|
}
|
|
|
|
if (n < 0 || n > 100) {
|
|
return throwError.call(this, 'n must be a number 0 - 100', cb);
|
|
}
|
|
|
|
this._quality = Math.round(n);
|
|
|
|
if (isNodePattern(cb)) {
|
|
cb.call(this, null, this);
|
|
}
|
|
|
|
return this;
|
|
}
|
|
}
|
|
});
|