接口 CanvasImageData

interface CanvasImageData {
    createImageData(sw: number, sh: number, settings?: ImageDataSettings): ImageData;
    createImageData(imagedata: ImageData): ImageData;
    getImageData(sx: number, sy: number, sw: number, sh: number, settings?: ImageDataSettings): ImageData;
    putImageData(imagedata: ImageData, dx: number, dy: number): void;
    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX: number, dirtyY: number, dirtyWidth: number, dirtyHeight: number): void;
}