import Point from '../geo/Point';
import { BBOX } from './util/bbox';
import Extent from '../geo/Extent';
import Size from '../geo/Size';
import CollisionIndex from './CollisionIndex';
import { TextSymbol } from '../symbol';
export type Ctx = CanvasRenderingContext2D;
declare const Canvas: {
    /**
     * 临时canvas,用于图层的事件使用,主要用于getImageData
     * @returns
     */
    getTempCanvas(): HTMLCanvasElement;
    getCanvas2DPerformanceContext(canvas: HTMLCanvasElement): CanvasRenderingContext2D;
    getCanvas2DContext(canvas: HTMLCanvasElement): CanvasRenderingContext2D;
    setHitTesting(testing: boolean): void;
    createCanvas(width: number, height: number, canvasClass?: any): any;
    prepareCanvasFont(ctx: Ctx, style: TextSymbol, font?: string): void;
    /**
     * Set canvas's fill and stroke style
     * @param {CanvasRenderingContext2D} ctx
     * @param {Object} style
     * @param {Object} resources
     * @param {Boolean} testing  - paint for testing, ignore stroke and fill patterns
     */
    prepareCanvas(ctx: Ctx, style: any, resources: any, testing?: boolean): void;
    _createGradient(ctx: Ctx, g: any, extent: Extent): any;
    _setStrokePattern(ctx: Ctx, strokePattern: string, strokeWidth: number, linePatternOffset: number, resources: any): void;
    clearRect(ctx: Ctx, x1: number, y1: number, x2: number, y2: number): void;
    fillCanvas(ctx: Ctx, fillOpacity: number, x?: number, y?: number): void;
    getRgba(color: string, op: number): string;
    normalizeColorToRGBA(fill: number[], opacity?: number): string;
    image(ctx: Ctx, img: CanvasImageSource, x: number, y: number, width?: number, height?: number): void;
    text(ctx: Ctx, text: any, pt: any, style: any, textDesc: any): BBOX;
    _textOnMultiRow(ctx: Ctx, texts: any[], style: any, point: any, splitTextSize: Size, textSize: Size): BBOX;
    _textOnLine(ctx: Ctx, text: any, pt: any, textHaloRadius: number, textHaloFill: any, textHaloAlpha: number): void;
    fillText(ctx: any, text: any, pt: any, rgba?: any): void;
    textAlongLine(ctx: Ctx, text: string, paths: Array<Array<Point>>, style: any, textDesc: any, globalCollisonIndex: CollisionIndex): BBOX;
    _stroke(ctx: any, strokeOpacity: any, x?: any, y?: any): void;
    /**
     * mock gradient path
     * 利用颜色插值来模拟渐变的Path
     * @param ctx
     * @param points
     * @param lineDashArray
     * @param lineOpacity
     * @param isRing
     * @returns
     */
    _gradientPath(ctx: CanvasRenderingContext2D, points: any, lineDashArray: any, lineOpacity: any, isRing?: boolean): void;
    _path(ctx: any, points: any, lineDashArray?: any, lineOpacity?: any, ignoreStrokePattern?: any): void;
    path(ctx: CanvasRenderingContext2D, points: any, lineOpacity: any, fillOpacity?: any, lineDashArray?: any): void;
    roundRect(ctx: CanvasRenderingContext2D, points: Array<Point>, lineOpacity?: number, fillOpacity?: number): void;
    _multiClip(ctx: any, points: any): void;
    polygon(ctx: any, points: any, lineOpacity: any, fillOpacity: any, lineDashArray?: any, smoothness?: any): void;
    _ring(ctx: any, ring: any, lineDashArray: any, lineOpacity: any, ignorePattern?: any): void;
    paintSmoothLine_bak(ctx: any, points: any, lineOpacity: any, smoothValue: any, close: any, tailIdx?: any, tailRatio?: any): void;
    paintSmoothLine(ctx: CanvasRenderingContext2D, points: Array<Point>, lineOpacity: number, smoothValue: boolean, close: boolean, tailIdx?: number, tailRatio?: number): void;
    /**
     * draw an arc from p1 to p2 with degree of (p1, center) and (p2, center)
     * @param  {Context} ctx    canvas context
     * @param  {Point} p1      point 1
     * @param  {Point} p2      point 2
     * @param  {Number} degree arc degree between p1 and p2
     */
    _arcBetween(ctx: CanvasRenderingContext2D, p1: Point, p2: Point, degree: number): number[];
    _lineTo(ctx: CanvasRenderingContext2D, p: any): void;
    bezierCurveAndFill(ctx: CanvasRenderingContext2D, points: any, lineOpacity: any, fillOpacity: any): void;
    _bezierCurveTo(ctx: CanvasRenderingContext2D, p1: any, p2: any, p3: any): void;
    ellipse(ctx: CanvasRenderingContext2D, pt: any, width: any, heightTop: any, heightBottom: any, lineOpacity: any, fillOpacity: any): void;
    rectangle(ctx: CanvasRenderingContext2D, pt: any, size: any, lineOpacity: any, fillOpacity: any): void;
    sector(ctx: CanvasRenderingContext2D, pt: any, size: any, angles: any, lineOpacity: any, fillOpacity: any): void;
    _isPattern(style: any): boolean;
    drawCross(ctx: CanvasRenderingContext2D, x: number, y: number, lineWidth: number, color: string | CanvasGradient | CanvasPattern): void;
    copy(canvas: HTMLCanvasElement, c?: HTMLCanvasElement): HTMLCanvasElement;
    pixelRect(ctx: CanvasRenderingContext2D, point: number[], lineOpacity: number, fillOpacity: number): void;
};
export default Canvas;
//# sourceMappingURL=Canvas.d.ts.map