import type { Sharp } from 'sharp';
import { ExtractedMetadata, SanitizedOptions, TemplateConfig } from '../types';
export interface ProcessedTemplateImage {
    baseImage: Sharp;
    effectiveMetadata: ExtractedMetadata;
    usedBackgroundImage: boolean;
}
export interface PreparedTemplateImage {
    effectiveMetadata: ExtractedMetadata;
    imageBuffer?: Buffer;
}
/** Fetch and validate optional background bytes before native render admission. */
export declare function prepareImageForTemplate(metadata: ExtractedMetadata, template: TemplateConfig, options: SanitizedOptions): Promise<PreparedTemplateImage>;
export declare function processImageForTemplate(preparedImage: PreparedTemplateImage, template: TemplateConfig, width: number, height: number, options: SanitizedOptions): Promise<ProcessedTemplateImage>;