import type { VDTDocument, VDTPage, VDTColumn, BoundingBox } from '../vdt.js';
import { type CjkGridCells } from '../pipeline/cjkGrid.js';
export declare function renderBaselineGrid(ctx: CanvasRenderingContext2D, contentArea: BoundingBox, baselineIncrement: number, color: string, lineWidth: number, textExtent: {
    top: number;
    bottom: number;
}): void;
/** The character grid (稿纸) over the type area (`cjk.grid.show`): one
 *  square per character position, drawn in a light grey (see
 *  `cjkGridCells`). */
export declare function renderCharacterGrid(ctx: CanvasRenderingContext2D, cells: CjkGridCells): void;
export declare function renderColumnRule(ctx: CanvasRenderingContext2D, columns: VDTColumn[], color: string, lineWidth: number, footnoteAreas?: VDTPage['footnoteAreas']): void;
export declare function renderCutLines(ctx: CanvasRenderingContext2D, page: VDTPage, doc: VDTDocument): void;
/** The page's content area. Pages built by the pipeline carry it directly
 *  (`page.contentArea` — per page, so mirrored margins are honoured); the
 *  column-bbox inference below only serves hand-built pages. */
export declare function computeContentArea(page: VDTPage, doc: VDTDocument): BoundingBox;
/** The separator rules above the footnotes of a page's columns. */
export declare function renderFootnoteRules(ctx: CanvasRenderingContext2D, page: VDTPage): void;
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