/** All supported output format keys */
type FormatKey = 'jpg' | 'jpeg' | 'jfif' | 'png' | 'webp' | 'avif' | 'gif' | 'bmp' | 'tiff' | 'tif' | 'psd' | 'tga' | 'ppm' | 'ico';
interface ConvertOptions {
    /** Target format key */
    format: FormatKey;
    /** Quality 0-100. If omitted, uses format-specific default. */
    quality?: number;
    /** Resize options. If omitted, output matches input dimensions. */
    resize?: ResizeOptions;
    /** Strip EXIF/metadata. Default: false */
    stripMetadata?: boolean;
}
interface ResizeOptions {
    width?: number;
    height?: number;
    /** Resize strategy. Default: 'contain' */
    fit?: 'contain' | 'cover' | 'fill' | 'inside' | 'outside';
}
interface ConvertResult {
    /** The converted image as a Blob */
    blob: Blob;
    /** Suggested filename (e.g., 'photo.jpg') */
    filename: string;
    /** Output width in pixels */
    width: number;
    /** Output height in pixels */
    height: number;
    /** Format key used */
    format: FormatKey;
    /** MIME type of the output */
    mime: string;
    /** Output file size in bytes */
    size: number;
}
interface BatchOptions extends ConvertOptions {
    /** Max concurrent conversions. Default: 4 */
    concurrency?: number;
    /** Progress callback — called after each file completes */
    onProgress?: (progress: BatchProgress) => void;
}
interface BatchProgress {
    completed: number;
    total: number;
    current: ConvertResult;
}
interface EncodeOptions {
    /** Quality 0-100 */
    quality?: number;
}
interface EncoderModule {
    meta: FormatMeta;
    encode: (canvas: HTMLCanvasElement | OffscreenCanvas, options?: EncodeOptions) => Promise<Blob>;
}
interface FormatMeta {
    /** Canonical format key */
    key: FormatKey;
    /** Alias keys that resolve to this encoder */
    aliases: FormatKey[];
    /** Human-readable label: "JPEG", "AVIF", "BMP" */
    label: string;
    /** MIME type: 'image/jpeg', 'image/avif', etc. */
    mime: string;
    /** File extension: 'jpg', 'avif', etc. */
    ext: string;
    /** Whether this format supports quality control */
    supportsCompression: boolean;
    /** Compression strategy */
    compressionType: 'lossy' | 'lossless' | 'palette' | 'none';
    /** Default quality when compression is enabled (null for uncompressible) */
    defaultQuality: number | null;
    /** Quality range [min, max] or null */
    qualityRange: [number, number] | null;
    /** UI hint text for quality slider */
    qualityHint: string;
    /** true for formats without alpha (JPEG, BMP) — need white bg compositing */
    requiresAlphaCompositing: boolean;
    /** Whether the format supports transparency */
    supportsTransparency: boolean;
}

export type { BatchOptions as B, ConvertOptions as C, EncodeOptions as E, FormatKey as F, ResizeOptions as R, BatchProgress as a, ConvertResult as b, EncoderModule as c, FormatMeta as d };