import SharpImage from './util/SharpImage' ; import LuminanceSource from './../../core/LuminanceSource' ; import InvertedLuminanceSource from './../../core/InvertedLuminanceSource' ; import Exception from './../../core/Exception' ; author dswitkin google author Sean Owen
 *  author code elektrowolle export default class SharpImageLuminanceSource extends LuminanceSource { public constructor ( private image ) { super ( image . getWidth ( ) , image . getHeight ( ) ) ; } public getRow ( y , row ) { if ( y < 0 || y >= this . image . getHeight ( ) ) { throw new Exception ( Exception . IllegalArgumentException , "Requested row is outside the image: " + y ) ; } const width = this . image . getWidth ( ) ; if ( row === null || row . length < width ) { row = new Uint8ClampedArray ( width ) ; } this . image . getRow ( y , row ) ; return row ; } public getMatrix ( ) { return this . image . getMatrix ( ) ; } public isCropSupported ( ) { return true ; } public crop ( left , top , width , height ) { this . crop ( left , top , width , height ) ; return this ; } return public isRotateSupported ( ) { return true ; } public rotateCounterClockwise ( ) { return this ; } public rotateCounterClockwise45 ( ) { return this ; } public invert ( ) { return new InvertedLuminanceSource ( this ) ; } }