@fe-daily/libimagequant-wasm/dist/index.d.ts

WASM bindings for libimagequant image quantization library

/**
 * libimagequant WASM - Promise-based API for PNG image quantization in browsers
 *
 * This module provides a high-level, promise-based interface for the libimagequant
 * image quantization library using WASM directly.
 */
export interface QuantizationOptions {
    /** Speed vs quality trade-off (1-10, lower = better quality) */
    speed?: number;
    /** Quality settings */
    quality?: {
        min: number;
        target: number;
    };
    /** Maximum colors in palette (2-256) */
    maxColors?: number;
    /** Dithering level (0.0-1.0) */
    dithering?: number;
    /** Posterization level (0-4) */
    posterization?: number;
}
export interface QuantizationResult {
    /** Color palette array */
    palette: number[][];
    /** PNG bytes (Uint8Array) - quantized image as indexed PNG */
    pngBytes: Uint8Array;
    /** ImageData object - quantized image as RGBA data */
    imageData: ImageData;
    /** Achieved quality (0-1) */
    quality: number;
    /** Number of colors in palette */
    paletteLength: number;
    /** Image width */
    width: number;
    /** Image height */
    height: number;
}
export interface LibImageQuantOptions {
    /** Custom path to WASM module directory (should contain libimagequant_wasm.js) */
    wasmUrl?: string;
    /** Pre-loaded WASM module (useful for Next.js and other bundlers) */
    wasmModule?: any;
}
export default class LibImageQuant {
    private wasmModule;
    private isInitialized;
    private wasmUrl?;
    private preloadedWasmModule?;
    private initPromise;
    constructor(options?: LibImageQuantOptions);
    /**
     * Initialize the WASM module
     */
    private initializeWasm;
    /**
     * Quantize a PNG from bytes or Blob
     */
    quantizePng(pngData: Uint8Array | ArrayBuffer | Blob, options?: QuantizationOptions): Promise<QuantizationResult>;
    /**
     * Quantize from ImageData and return as PNG bytes or ImageData
     */
    quantizeImageData(imageData: ImageData, options?: QuantizationOptions): Promise<QuantizationResult>;
    /**
     * Internal method to quantize RGBA data
     */
    private quantizeRgbaData;
    /**
     * Clean up resources (no longer needed since we're not using workers)
     */
    dispose(): void;
}
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