import { Renderer, type RenderContext } from './Renderer';
import type { Group } from '../shapes/Group';
import { Rect, Circle, Ellipse, Line, Arc, Polygon, Polyline, Path, Star, TextNode, ImageNode, Sprite } from '../shapes/index';
import { Matrix2D } from '../utils';
import { LayerCache } from '../performance/LayerCache';
export declare class CanvasRenderer extends Renderer {
    private canvas;
    private ctx;
    private patternCache;
    readonly layerCache: LayerCache;
    batchRendering: boolean;
    dirtyRegionsEnabled: boolean;
    layerCacheEnabled: boolean;
    /** Exposed for tests — number of clearRect calls in last render. */
    lastClearRectCount: number;
    /** Exposed for tests — fill calls in last render. */
    lastFillCallCount: number;
    private drawCallCount;
    private bgImage;
    private bgImageKey;
    private lastRoot;
    private lastCamera;
    init(container: HTMLElement, options: RenderContext): void;
    resize(width: number, height: number, pixelRatio: number): void;
    getElement(): HTMLCanvasElement;
    render(root: Group, cameraMatrix?: Matrix2D): void;
    private paintBackground;
    private ensureBackgroundImage;
    private clearSceneDirty;
    toDataURL(type?: string, quality?: number): string;
    destroy(): void;
    drawGroup(group: Group): void;
    private drawGroupBatched;
    private drawRectBatch;
    private renderGroupToCache;
    private drawNode;
    private drawFocusRing;
    private resolveFill;
    private resolveStroke;
    drawRect(node: Rect): void;
    drawCircle(node: Circle): void;
    drawEllipse(node: Ellipse): void;
    drawLine(node: Line): void;
    drawArc(node: Arc): void;
    drawPolygon(node: Polygon): void;
    drawPolyline(node: Polyline): void;
    drawPath(node: Path): void;
    drawStar(node: Star): void;
    drawText(node: TextNode): void;
    drawImage(node: ImageNode): void;
    drawSprite(node: Sprite): void;
    getLastDrawCallCount(): number;
    private roundRect;
    private fillAndStroke;
    private setFill;
    private applyStroke;
}