import { CanvasTexture } from "three";
/** Canvas type that works both in main thread and workers */
export type UICanvas = HTMLCanvasElement | OffscreenCanvas;
/** 2D rendering context type for UICanvas */
export type UICanvasRenderingContext2D = CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D;
/**
 * Creates a canvas using OffscreenCanvas if available, otherwise falls back to HTMLCanvasElement.
 *
 * @param width - Canvas width in pixels
 * @param height - Canvas height in pixels
 * @returns Canvas instance
 */
export declare function createCanvas(width: number, height: number): UICanvas;
/**
 * Gets the 2D rendering context for a UICanvas.
 *
 * @param canvas - Canvas instance
 * @returns 2D rendering context or null
 */
export declare function getCanvas2DContext(canvas: UICanvas): UICanvasRenderingContext2D | null;
/**
 * Creates a CanvasTexture with maximum WebGL1/WebGL2 compatibility.
 * - ClampToEdge wrapping (required for NPOT in WebGL1)
 * - Linear filtering without mipmaps (NPOT-safe)
 * - RGBA/UnsignedByte format (no extensions needed)
 * - sRGB colorspace only if supported
 *
 * @param canvas - Source canvas
 * @returns Configured CanvasTexture
 */
export declare function createCanvasTexture(canvas: UICanvas): CanvasTexture;