@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
30 lines (29 loc) • 1.03 kB
TypeScript
import LuminanceSource from '../core/LuminanceSource';
/**
* @deprecated Moving to @zxing/browser
*/
export declare class HTMLCanvasElementLuminanceSource extends LuminanceSource {
private canvas;
private buffer;
private static DEGREE_TO_RADIANS;
private static FRAME_INDEX;
private tempCanvasElement;
constructor(canvas: HTMLCanvasElement, doAutoInvert?: boolean);
private static makeBufferFromCanvasImageData;
private static toGrayscaleBuffer;
getRow(y: number, row: Uint8ClampedArray): Uint8ClampedArray;
getMatrix(): Uint8ClampedArray;
isCropSupported(): boolean;
crop(left: number, top: number, width: number, height: number): LuminanceSource;
/**
* This is always true, since the image is a gray-scale image.
*
* @return true
*/
isRotateSupported(): boolean;
rotateCounterClockwise(): LuminanceSource;
rotateCounterClockwise45(): LuminanceSource;
private getTempCanvasElement;
private rotate;
invert(): LuminanceSource;
}