eewing
26 lines
918 B
TypeScript
26 lines
918 B
TypeScript
import { LuminanceSource } from '@zxing/library';
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export declare class HTMLCanvasElementLuminanceSource extends LuminanceSource {
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private canvas;
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private static DEGREE_TO_RADIANS;
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private static makeBufferFromCanvasImageData;
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private static toGrayscaleBuffer;
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private buffer;
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private tempCanvasElement?;
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constructor(canvas: HTMLCanvasElement);
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getRow(y: number, row: Uint8ClampedArray): Uint8ClampedArray;
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getMatrix(): Uint8ClampedArray;
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isCropSupported(): boolean;
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crop(left: number, top: number, width: number, height: number): LuminanceSource;
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/**
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* This is always true, since the image is a gray-scale image.
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*
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* @return true
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*/
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isRotateSupported(): boolean;
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rotateCounterClockwise(): LuminanceSource;
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rotateCounterClockwise45(): LuminanceSource;
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invert(): LuminanceSource;
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private getTempCanvasElement;
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private rotate;
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}
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