export declare const PDF_EVIDENCE_COORDINATE_BASIS: 1000000;
export interface PdfEvidenceBounds {
    bottom: number;
    left: number;
    right: number;
    top: number;
}
export interface PdfEvidenceRegion {
    bounds: PdfEvidenceBounds;
    id: string;
    label?: string;
    sourceRegionIds: readonly string[];
    targetIds: readonly string[];
}
export interface PdfEvidencePage {
    canvasHeight: number;
    canvasId: string;
    canvasKind: 'source';
    canvasWidth: number;
    coordinateBasis: typeof PDF_EVIDENCE_COORDINATE_BASIS;
    pageNumber: number;
    regions: readonly PdfEvidenceRegion[];
    renderProfileSha256: string;
    rotationDegrees: 0 | 90 | 180 | 270;
    sourceSha256: string;
}
export interface PdfEvidenceRegionLocation {
    pageNumber: number;
}
export interface PdfEvidenceOverlay {
    coordinateBasis: typeof PDF_EVIDENCE_COORDINATE_BASIS;
    loadPage: (pageNumber: number, signal: AbortSignal) => Promise<PdfEvidencePage | null>;
    locateRegion?: (regionId: string, signal: AbortSignal) => Promise<PdfEvidenceRegionLocation | null>;
    renderProfileSha256: string;
    sourceSha256: string;
}