import type { InferenceSession, Tensor } from "onnxruntime-common";
/**
 * Minimal canvas interface compatible with both `@napi-rs/canvas` (Node)
 * and `HTMLCanvasElement` / `OffscreenCanvas` (Browser).
 */
export interface CoreCanvas {
    /** Canvas width in pixels. */
    width: number;
    /** Canvas height in pixels. */
    height: number;
}
/**
 * Platform abstraction for running YOLO inference across Node.js and browser.
 *
 * Platform-specific modules (`onnxruntime-node`/`onnxruntime-web`,
 * `ppu-ocv`/`ppu-ocv/web`) are injected through this interface,
 * keeping all business logic platform-agnostic.
 */
export interface PlatformProvider {
    /** Create an ONNX inference session from a model buffer. */
    createInferenceSession(model: ArrayBuffer): Promise<InferenceSession>;
    /** Create a typed tensor for model input. */
    createTensor(type: Tensor.Type, data: Float32Array, dims: readonly number[]): Tensor;
    /** Create a blank canvas with the given dimensions. */
    createCanvas(width: number, height: number): CoreCanvas;
    /** Check whether a value is a platform canvas. */
    isCanvasLike(value: unknown): value is CoreCanvas;
    /** Decode an image buffer into a canvas. */
    prepareCanvas(buffer: ArrayBuffer): Promise<CoreCanvas>;
    /**
     * Resize a canvas to the given dimensions, returning a new canvas.
     * Implementations must handle internal resource cleanup.
     */
    resizeImage(source: CoreCanvas, width: number, height: number): CoreCanvas;
    /**
     * Get a 2D rendering context from a canvas.
     * Implementations should pass `{ willReadFrequently: true }` where appropriate.
     */
    getContext2D(canvas: CoreCanvas): CanvasRenderingContext2D;
    /** Save a canvas as a debug image file (no-op in browser). */
    saveDebugImage(canvas: CoreCanvas, filename: string, outputDir: string): Promise<void>;
    /** Initialize the image processing runtime (OpenCV). */
    initRuntime(): Promise<void>;
    /** Yield the event loop (`setImmediate` on Node, `setTimeout` in browser). */
    scheduleYield(): Promise<void>;
}