/**
 * Low-level PDF graphics operator helpers shared between the main
 * renderer and the widget appearance builders.
 *
 * Extracted from `pdf-renderer.ts` during M4 so that
 * `src/phases/phase6-widgets.ts` can build form-widget appearance
 * streams without importing values from `pdf-renderer.ts` (which would
 * create a load-time cycle now that pdf-renderer imports widget
 * builders from phase6-widgets).
 */
import type { PdfColor } from "./phase4-types.js";
import { PDFArray } from "./pdf-objects.js";
/**
 * State threaded through the renderer when emitting PDF/A output.
 *
 * `colorSpaceArray` is the `/CS0` indirect ICC-based color space the
 * renderer uses to satisfy PDF/A's "all colors must reference an ICC
 * profile" rule. The other fields are present so individual draw
 * operators can decide whether to emit color in normalized RGB
 * (PDF/A) or pass through the document-supplied color space.
 */
export interface PreparedPdfaState {
    colorSpaceArray: PDFArray;
    iccProfileBuffer: Buffer;
    outputConditionIdentifier: string;
}
export declare function validateColorComponent(value: number, label: string): number;
export declare function colorComponents(color: PdfColor): number[];
export declare function colorToRgb(color: PdfColor): {
    b: number;
    g: number;
    r: number;
    space: "rgb";
};
export declare function buildColorOperators(color: PdfColor, mode: "fill" | "stroke", pdfa?: PreparedPdfaState): string[];
export declare function buildRectPath(x: number, y: number, width: number, height: number): string;
export declare function buildRoundedRectPath(x: number, y: number, width: number, height: number, radius: number): string;
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