/**
 * Turn a uniform into a varying/writeable value.
 * - If the uniform was used in the fragment shader, it will become a varying in both shaders.
 * - If the uniform was only used in the vertex shader, it will become a writeable var.
 */
export function uniformToVarying({ vertexShader, fragmentShader }: {
    vertexShader: any;
    fragmentShader: any;
}, uniformName: any, varyingName?: any): {
    vertexShader: any;
    fragmentShader: any;
};
/**
 * @experimental
 *
 * A specialized `Text` implementation that accepts any number of `Text` children
 * and automatically batches them together to render in a single draw call.
 *
 * The `material` of each child `Text` will be ignored, and the `material` of the
 * `BatchedText` will be used for all of them instead.
 *
 * NOTE: This only works in WebGL2 or where the OES_texture_float extension is available.
 */
export class BatchedText extends Text {
    /**
     * @typedef {Object} PackingInfo
     * @property {number} index - the packing order index when last packed, or -1
     * @property {boolean} dirty - whether it has synced since last pack
     */
    /**
     * @type {Map<Text, PackingInfo>}
     */
    _members: Map<Text, {
        /**
         * - the packing order index when last packed, or -1
         */
        index: number;
        /**
         * - whether it has synced since last pack
         */
        dirty: boolean;
    }>;
    _dataTextures: {};
    _onMemberSynced: (e: any) => void;
    /**
     * @override
     * Batch any Text objects added as children
     */
    override add(...objects: any[]): this;
    /**
     * @override
     */
    override remove(...objects: any[]): this;
    /**
     * @param {Text} text
     */
    addText(text: Text): void;
    /**
     * @param {Text} text
     */
    removeText(text: Text): void;
    _needsRepack: boolean;
    updateMatrixWorld(force: any): void;
    /**
     * Update the batched geometry bounds to hold all members
     */
    updateBounds(): void;
    sync(callback: any): void;
    copy(source: any): this;
}
import { Text } from "./Text.js";