import type { Asset, Relation } from 'assetgraph';
export type VariationAxes = Record<string, number | {
    min: number;
    max: number;
    default?: number;
}> | undefined;
export type AssetGraphError = Error & {
    asset?: Asset;
    relation?: Relation;
};
export interface TracedFontUsage {
    text: string;
    pageText: string;
    fontUrl: string;
    preload: boolean;
    fontFamilies: Set<string>;
    props: Record<string, string>;
    texts: string[];
    smallestOriginalSize: number;
    smallestOriginalFormat?: string;
    fontStyles: Set<string | number | undefined>;
    fontStretches: Set<string | number | undefined>;
    fontWeights: Set<string | number | undefined>;
    fontVariationSettings: Set<string>;
    hasFontFeatureSettings: boolean;
    fontFeatureTags?: Iterable<string>;
}
export interface SubsettedFontUsage extends TracedFontUsage {
    subsets?: Record<string, Buffer>;
    smallestSubsetSize?: number;
    smallestSubsetFormat?: string;
    fullyInstanced?: boolean;
    numAxesPinned?: number;
    numAxesReduced?: number;
    variationAxes?: VariationAxes;
}
export interface ReportFontUsage extends SubsettedFontUsage {
    codepoints: {
        original: number[];
        used: number[];
        unused: number[];
        page: number[];
    };
}
export type ExternalFontUsage = Omit<ReportFontUsage, 'subsets' | 'hasFontFeatureSettings' | 'fontFeatureTags'>;
export declare function wrapAssetGraphError(rawErr: unknown, fallbackAsset?: Asset): AssetGraphError;
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