import { Scene } from "@babylonjs/core/scene";
import { AbstractEngine } from "@babylonjs/core/Engines/abstractEngine";
import { SceneLoaderQualitySelector } from "../loading/loader";
/**
 * Sets wether or not to use KTX2 compressed textures in the application (disabled by default).
 * When enabled, the application will try to load KTX2 textures instead of the original textures when possible, and will ignore any KTX2 texture when disabled.
 * @param enabled defines wether or not to use KTX2 compressed textures in the application.
 */
export declare function setUseKtx2CompressedTextures(enabled: boolean): void;
/**
 * Returns wether or not KTX2 compressed textures are enabled in the application.
 */
export declare function isUsingKtx2CompressedTextures(): boolean;
/**
 * @internal
 */
export declare function _getKtx2TextureName(name: string): string;
/**
 * Set the compressed texture format to use, based on the formats you have, and the formats
 * supported by the hardware / browser.
 * @param engine defines the reference to the engine to configure the texture format to use.
 * @see `@babylonjs/core/Engines/Extensions/engine.textureSelector.d.ts` for more information.
 */
export declare function configureEngineToUseCompressedTextures(engine: AbstractEngine): void;
/**
 * Adds the texture located at the given URL to the list of excluded compressed textures.
 * Which means it will not be loaded as a compressed texture even if it has a supported format and the hardware supports it.
 * @param engine defines the reference to the engine to register the excluded texture.
 * @param textureUrl defines the URL of the texture to exclude
 */
export declare function addExcludedCompressedTexture(engine: AbstractEngine, textureUrl: string): void;
/**
 * Updates URL of all textures in the scene to match the given quality when possible.
 * @param quality defines the quality to apply to the textures.
 * @param scene defines the scene to update the textures in.
 * @param rootUrl defines the root URL to use when updating the texture URLs.
 * @see `SceneLoaderQualitySelector` for more information on the available quality levels.
 */
export declare function applyTexturesQuality(quality: SceneLoaderQualitySelector, scene: Scene, rootUrl: string): void;
/**
 * Gets the URL suffix to use for a texture based on the scene's loading texture quality and the texture's metadata.
 * @param sourceProperty defines the texture to get the suffix for. Can be a texture or a texture serialization object.
 * @param scene defines the scene to get the loading texture quality from.
 * @returns the URL to use for the texture, or the original texture name if no suffix should be applied.
 */
export declare function getTextureUrl(sourceProperty: any, scene: Scene): any;