import CollisionTester from './collisionTester.js';
import VectorWorker from '../vectorWorker.js';
import type ImageStore from '../imageStore.js';
import type { GPUType, GlyphDefinition, GlyphWorkerLayer } from 'style/style.spec.js';
import type { GlyphObject } from './glyph.spec.js';
import type { TileRequest } from 'workers/worker.spec.js';
import type { GlyphWorker as GlyphWorkerSpec, IDGen, VTFeature } from '../process.spec.js';
/** Worker for processing glyph data */
export default class GlyphWorker extends VectorWorker implements GlyphWorkerSpec {
    #private;
    collisionTest: CollisionTester;
    imageStore: ImageStore;
    featureStore: Map<string, GlyphObject[]>;
    sourceWorker: MessagePort;
    tileSize: number;
    /**
     * @param idGen - id generator to ensure features don't overlap
     * @param gpuType - the GPU context of the map renderer (WebGL(1|2) | WebGPU)
     * @param sourceWorker - the source worker to send requests to
     * @param imageStore - the image store to pull/request the needed glyphs/icons
     * @param tileSize - the tile size
     */
    constructor(idGen: IDGen, gpuType: GPUType, sourceWorker: MessagePort, imageStore: ImageStore, tileSize: number);
    /**
     * Setup a glyph layer for future processing of vector data
     * @param glyphLayer - the glyph layer
     * @returns the layer to process future glyph data
     */
    setupLayer(glyphLayer: GlyphDefinition): GlyphWorkerLayer;
    /**
     * Build a Glyph Feature from input vector data
     * @param tile - the tile request
     * @param extent - the extent of the tile
     * @param feature - the input vector tile feature
     * @param glyphLayer - the glyph worker layer describing how to process the feature
     * @param mapID - the id of the map to ship the data back to
     * @param sourceName - the name of the source the data belongs to
     * @returns true if the feature was built
     */
    buildFeature(tile: TileRequest, extent: number, feature: VTFeature, glyphLayer: GlyphWorkerLayer, mapID: string, sourceName: string): Promise<boolean>;
    /**
     * Flush a tile-request to the render thread
     * @param mapID - id of the map to ship the data back to
     * @param tile - tile request
     * @param sourceName - name of the source the data belongs to
     * @param wait - wait function. We need to wait for a response of missing glyph/icon data beore flushing
     */
    flush(mapID: string, tile: TileRequest, sourceName: string, wait: Promise<void>): Promise<void>;
}