declare type ColorFunc = (grad: number, fastMode: boolean, output: number[]) => void;
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declare type ColorState = 'inRange' | 'outOfRange';
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declare class HeatmapLayer {
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canvas: HTMLCanvasElement;
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blurSize: number;
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pointSize: number;
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maxOpacity: number;
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minOpacity: number;
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private _brushCanvas;
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private _gradientPixels;
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constructor();
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/**
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* Renders Heatmap and returns the rendered canvas
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* @param data array of data, each has x, y, value
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* @param width canvas width
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* @param height canvas height
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*/
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update(data: number[][], width: number, height: number, normalize: (value: number) => number, colorFunc: Record<ColorState, ColorFunc>, isInRange?: (grad?: number) => boolean): HTMLCanvasElement;
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/**
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* get canvas of a black circle brush used for canvas to draw later
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*/
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_getBrush(): HTMLCanvasElement;
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/**
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* get gradient color map
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* @private
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*/
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_getGradient(colorFunc: Record<ColorState, ColorFunc>, state: ColorState): Uint8ClampedArray;
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}
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export default HeatmapLayer;
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