import type { Style } from '@opengeoweb/webmap';
import type { STACColormapEntry, STACRenderEntry } from '../api';
/**
 * Converts a STAC render extension colormap to an OpenLayers WebGLTile palette style.
 *
 * The STAC colormap maps pixel values (0–255) to RGBA arrays where each channel is 0–255.
 * The returned object is suitable for use as the `style` option of `ol/layer/WebGLTile`.
 */
export declare const stacColormapToOlStyle: (colormap: Record<string, STACColormapEntry>) => object;
/**
 * Returns a grayscale WebGLTile style where band-1 value maps from black (0)
 * to white (255). Used as a safe default when no STAC render colormap exists.
 */
export declare const stacGrayscaleOlStyle: () => object;
/**
 * Returns a grayscale style for normalized GeoTIFF samples where `['band', 1]`
 * is expected in [0, 1]. This avoids white-only output when raw data range is
 * not strictly 0-255.
 */
export declare const stacNormalizedGrayscaleOlStyle: () => object;
/**
 * Converts a STAC render extension `renders` map to an array of `Style` objects
 * compatible with the Layer Manager style selector.
 */
export declare const getRendersAsStyles: (renders: Record<string, STACRenderEntry>) => Style[];