import type { InferenceSession, Tensor } from "onnxruntime-common";
/**
 * Union type for canvas objects across platforms.
 * Node.js uses ppu-ocv Canvas, browsers use HTMLCanvasElement or OffscreenCanvas.
 */
export type CoreCanvas = any;
/**
 * Platform abstraction interface for cross-platform ONNX inference.
 * Implementations provide Node.js or browser-specific logic while
 * core services remain platform-agnostic.
 */
export interface PlatformProvider {
    /** ONNX Runtime module — InferenceSession and Tensor constructors */
    readonly ort: {
        InferenceSession: typeof InferenceSession;
        Tensor: typeof Tensor;
    };
    /**
     * Creates a blank canvas with the specified dimensions
     * @param width - Canvas width in pixels
     * @param height - Canvas height in pixels
     */
    createCanvas(width: number, height: number): CoreCanvas;
    /**
     * Converts raw image data (ArrayBuffer) into a canvas for processing
     * @param image - Raw image data
     */
    prepareCanvas(image: ArrayBuffer): Promise<CoreCanvas>;
    /**
     * Loads a resource from various sources (ArrayBuffer, file path, URL, or default URL)
     * @param source - ArrayBuffer, file path, URL, or undefined to use defaultUrl
     * @param defaultUrl - Fallback URL if source is undefined
     */
    loadResource(source: string | ArrayBuffer | undefined, defaultUrl: string): Promise<ArrayBuffer>;
    /** Initializes the image processing runtime (e.g. OpenCV) */
    initRuntime(): Promise<void>;
}