import Workflow, { Feature } from './workflow.js';
import type Context from '../context/context.js';
import type { HeatmapData } from 'workers/worker.spec.js';
import type { TileGL as Tile } from 'source/tile.spec.js';
import type { BBox, HeatmapDefinition, HeatmapStyle, HeatmapWorkflowLayerGuide, LayerDefinitionBase } from 'style/style.spec.js';
import type { HeatmapFeature as HeatmapFeatureSpec, HeatmapSource, HeatmapWorkflow as HeatmapWorkflowSpec, HeatmapWorkflowUniforms } from './workflow.spec.js';
/** Heatmap Feature is a standalone heatmap render storage unit that can be drawn to the GPU */
export declare class HeatmapFeature extends Feature implements HeatmapFeatureSpec {
    workflow: HeatmapWorkflow;
    source: HeatmapSource;
    layerGuide: HeatmapWorkflowLayerGuide;
    tile: Tile;
    count: number;
    offset: number;
    featureCode: number[];
    parent?: Tile | undefined;
    bounds?: BBox | undefined;
    type: "heatmap";
    radiusLo?: number;
    opacityLo?: number;
    intensityLo?: number;
    radiusHi?: number;
    opacityHi?: number;
    intensityHi?: number;
    /**
     * @param workflow - the heatmap workflow
     * @param source - the heatmap source
     * @param layerGuide - layer guide for this feature
     * @param tile - the tile that the feature is drawn on
     * @param count - the number of points
     * @param offset - the offset of the points
     * @param featureCode - the encoded feature code that tells the GPU how to compute it's properties
     * @param parent - the parent tile if applicable
     * @param bounds - the bounds of the tile if applicable
     */
    constructor(workflow: HeatmapWorkflow, source: HeatmapSource, layerGuide: HeatmapWorkflowLayerGuide, tile: Tile, count: number, offset: number, featureCode?: number[], parent?: Tile | undefined, bounds?: BBox | undefined);
    /**
     * Draw the feature to the GPU
     * @param interactive - whether or not the feature is interactive
     */
    draw(interactive?: boolean): void;
    /** Draw the feature's texture to the GPU */
    drawTexture(): void;
    /**
     * Duplicate this feature
     * @param tile - the tile that the feature is drawn on
     * @param parent - the parent tile if applicable
     * @param bounds - the bounds of the tile if applicable
     * @returns the duplicated feature
     */
    duplicate(tile: Tile, parent?: Tile, bounds?: BBox): HeatmapFeature;
    /**
     * Set the webgl1 attributes if the context is webgl1
     * Low-High is a system to help WebGL blend between two values on zoom change
     * @param radiusLo - the low radius
     * @param opacityLo - the low opacity
     * @param intensityLo - the low intensity
     * @param radiusHi - the high radius
     * @param opacityHi - the high opacity
     * @param intensityHi - the high intensity
     */
    setWebGL1Attributes(radiusLo?: number, opacityLo?: number, intensityLo?: number, radiusHi?: number, opacityHi?: number, intensityHi?: number): void;
}
/** Heatmap Workflow */
export default class HeatmapWorkflow extends Workflow implements HeatmapWorkflowSpec {
    #private;
    label: "heatmap";
    texture: WebGLTexture;
    nullTextureA: WebGLTexture;
    nullTextureB: WebGLTexture;
    framebuffer: WebGLFramebuffer;
    extentBuffer?: WebGLBuffer;
    layerGuides: Map<number, HeatmapWorkflowLayerGuide>;
    uniforms: {
        [key in HeatmapWorkflowUniforms]: WebGLUniformLocation;
    };
    /** @param context - The WebGL(1|2) context */
    constructor(context: Context);
    /**
     * Build the heatmap source
     * @param heatmapData - the heatmap data sent from the tile worker
     * @param tile - the tile that the features are drawn on
     */
    buildSource(heatmapData: HeatmapData, tile: Tile): void;
    /**
     * Build the layer definition
     * @param layerBase - the common layer attributes
     * @param layer - the user defined layer attributes
     * @returns a built layer definition that's ready to describe how to render a feature
     */
    buildLayerDefinition(layerBase: LayerDefinitionBase, layer: HeatmapStyle): HeatmapDefinition;
    /** Resize the heatmap FBO */
    resize(): void;
    /** Setup the texture draw workflow */
    setupTextureDraw(): void;
    /**
     * Draw heatmap feature's textures
     * @param features - features to draw
     * @returns the resulting combination of associated features
     */
    textureDraw(features: HeatmapFeatureSpec[]): HeatmapFeatureSpec[] | undefined;
    /**
     * Draw feature to early FBO
     * @param featureGuide - feature to draw
     */
    drawToTexture(featureGuide: HeatmapFeatureSpec): void;
    /** Use the heatmap workflow */
    use(): void;
    /**
     * Draw the heatmap feature
     * @param feature - feature to draw
     * @param _interactive - whether or not the feature is interactive
     */
    draw(feature: HeatmapFeatureSpec, _interactive?: boolean): void;
    /** Delete the heatmap workflow */
    delete(): void;
}