/**
 * Just enough image codec to make mask and similarity decisions without a native dependency.
 *
 * PNG decoding and encoding cover masks and perceptual hashing; broader format support belongs
 * behind the injectable `decode` hooks rather than in this module. Header sniffing lives in
 * `image-header.ts` and is re-exported here.
 */
export { type ImageDimensionsInfo, readImageDimensions, type SniffedImage, type SniffedImageFormat, sniffImageType, } from './image-header.js';
/** Decoded pixels, always expanded to 8-bit RGBA so callers need no per-format branches. */
export interface RgbaImage {
    /** Width in pixels. */
    width: number;
    /** Height in pixels. */
    height: number;
    /** Pixels as RGBA, 4 bytes each, row by row. */
    data: Uint8Array;
}
/** Options for `decodePng()`. */
export interface DecodePngOptions {
    /**
     * Refuses to allocate pixel memory past this count. Checked against the header before
     * decompression, so a small file claiming enormous dimensions is rejected before it costs
     * anything.
     */
    maxPixels?: number;
}
/** Decodes a non-interlaced 8-bit PNG of any colour type into RGBA. */
export declare function decodePng(bytes: Uint8Array, options?: DecodePngOptions): RgbaImage;
/** Encodes RGBA pixels as an 8-bit, colour-type-6 PNG. */
export declare function encodePng(image: RgbaImage): Uint8Array;