import { VectorPath, VectorShape } from '../core/vector.js';
export type { PathSegment, StrokeStyle, VectorPath, VectorShape } from '../core/vector.js';
export { PathBuilder } from '../core/vector.js';
/**
 * Emit a {@link VectorShape} as PDF content-stream operators (ISO 32000 §8.5),
 * wrapped in a `q`/`Q` save-restore with the shape's transform as the CTM. The
 * subpaths are painted with a single operator, so the winding rule is decided
 * once (even-odd if any subpath asks).
 *
 * @param shape       The shape to draw.
 * @param patternName When set, the fill is this named shading pattern from the
 *   page's `/Pattern` resources (a gradient, EP16b) rather than a solid colour;
 *   only used if the shape actually carries a `fillGradient`.
 * @param alphaStateName When set, the shape's shadow is drawn first, under this
 *   named `/ExtGState` (its constant alpha) from the page's resources.
 * @returns The content-stream operator lines.
 */
/**
 * §20.1.8.40 `blurRad` — how a blurred shadow is drawn: as `count` copies of
 * the silhouette, each at `alpha` transparency, growing through the blur's
 * width. Shared with the emitter that registers the /ExtGState for it, so the
 * alpha it registers is the one the layers are drawn at.
 *
 * @param shadow The shadow (its `blurPt` and `alpha` are read).
 * @returns The number of layers and the transparency of each.
 */
export declare function shadowBlurLayers(shadow: {
    readonly blurPt: number;
    readonly alpha: number;
}): {
    count: number;
    alpha: number;
};
export declare function emitVectorShape(shape: VectorShape, patternName?: string, alphaStateName?: string, fillAlphaStateName?: string): Array<string>;
/**
 * The operators that make `paths` the current CLIP, under `transform` — the
 * same local→y-up-page matrix {@link emitVectorShape} takes. Emitted inside the
 * caller's own `q`…`Q`, and followed by the inverse matrix so what comes after
 * is back in page coordinates.
 *
 * @param paths     The clip outline, in the shape's local frame.
 * @param transform The local→page matrix.
 * @returns The operators: `cm`, the path, `W n`, and the inverse `cm`.
 */
export declare function emitClipPath(paths: ReadonlyArray<VectorPath>, transform: readonly [number, number, number, number, number, number]): Array<string>;