/**
 * @import { GraphicsDevice } from '../../platform/graphics/graphics-device.js'
 */
/**
 * Render pass implementation of HDR bloom effect.
 *
 * @category Graphics
 * @ignore
 */
export class FramePassBloom extends FramePass {
    /**
     * @param {GraphicsDevice} device - The graphics device.
     * @param {Texture} sourceTexture - The source texture, usually at half the resolution of the
     * render target getting blurred.
     * @param {number} format - The texture format.
     */
    constructor(device: GraphicsDevice, sourceTexture: Texture, format: number);
    bloomTexture: Texture;
    blurLevel: number;
    /**
     * Brightness below which the scene does not contribute to bloom, in the scene-referred
     * (pre-exposure) units bloom is generated and composited in. Zero, the default, applies no
     * high pass and keeps the whole scene blooming.
     *
     * @type {number}
     */
    threshold: number;
    bloomRenderTarget: RenderTarget;
    textureFormat: number;
    renderTargets: any[];
    /**
     * The downsample pass the high pass is compiled into, or null when the threshold is zero.
     *
     * @type {RenderPassDownsample|null}
     * @private
     */
    private prefilterPass;
    /**
     * Whether the existing passes were created with the high pass enabled.
     *
     * @type {boolean}
     * @private
     */
    private _prefilterEnabled;
    _sourceTexture: Texture;
    destroyRenderTargets(startIndex?: number): void;
    destroyRenderPasses(): void;
    createRenderTarget(index: any): RenderTarget;
    createRenderTargets(count: any): void;
    calcMipLevels(width: any, height: any, minSize: any): number;
    createRenderPasses(numPasses: any): void;
}
import { FramePass } from '../../platform/graphics/frame-pass.js';
import { Texture } from '../../platform/graphics/texture.js';
import { RenderTarget } from '../../platform/graphics/render-target.js';
import type { GraphicsDevice } from '../../platform/graphics/graphics-device.js';