import type { Matrix2D } from './style.js';
export type CadLineWeightMode = 'adaptive' | 'physical' | 'hairline';
export interface CadLineStyleOptions {
    /**
     * adaptive: CAD-viewer style thin-line overview with physical line weights returning while zooming.
     * physical: preserve source line width exactly.
     * hairline: draw all strokes as one CSS-pixel hairlines.
     */
    lineWeightMode?: CadLineWeightMode;
    /** Minimum visible stroke width, in CSS pixels. */
    minStrokeCssPx?: number;
    /** Maximum stroke width used around fit-to-page / low zoom, in CSS pixels. */
    maxOverviewStrokeCssPx?: number;
    /** Ignore text smaller than this CSS-pixel height to avoid black blobs in overview. */
    minTextCssPx?: number;
    /** Ignore filled shapes below this CSS-pixel area in adaptive mode. */
    minFilledAreaCssPx?: number;
}
export interface CadStrokeRuntime {
    dpr: number;
    zoom?: number;
}
export declare function estimateMatrixScale(m: Matrix2D): number;
export declare function canvasDpr(canvas: HTMLCanvasElement): number;
export declare function adaptiveStrokeUserWidth(sourceWidth: number, matrix: Matrix2D, opts: CadLineStyleOptions | undefined, runtime: CadStrokeRuntime): number;
export declare function shouldDrawTextByPixelSize(fontSizeSourceUnits: number, matrix: Matrix2D, opts: CadLineStyleOptions | undefined, runtime: CadStrokeRuntime): boolean;
export declare function shouldDrawFilledBounds(bounds: {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
} | undefined, matrix: Matrix2D, opts: CadLineStyleOptions | undefined, runtime: CadStrokeRuntime): boolean;