/**
 * TextColorNode - TSL Node for Text SDF color and opacity rendering.
 *
 * Follows the same pattern as InstanceNode and BatchNode from three.js.
 * This node handles SDF-based rendering of text, computing fill and outline
 * colors and opacity based on signed distance fields.
 *
 * @module TextColorNode
 */
import { Node } from 'three/webgpu';
import type { NodeBuilder } from 'three/webgpu';
import type { TSLNodeFactory, TSLTextureNode, TSLVec4Node } from '../types/tsl.cjs';
import type { TextNodeSource } from './TextNode.cjs';
export interface TextColorNodeSource extends TextNodeSource {
    sdfMap: TSLTextureNode | undefined;
}
export interface TextColorNodeFactory extends TSLNodeFactory<[
    text: TextColorNodeSource,
    baseDiffuse?: TSLVec4Node | null
], TSLVec4Node> {
    setParameterLength(length: number): this;
}
/**
 * TextColorNode handles SDF-based color and opacity for Text rendering.
 * It computes fill color, outline color, and proper alpha based on
 * signed distance field values.
 *
 * @augments Node
 */
declare class TextColorNode extends Node<'vec4'> {
    static get type(): string;
    /**
     * Constructs a new TextColorNode.
     *
     * @param {Text} text - Reference to the Text instance.
     */
    text: TextColorNodeSource;
    baseDiffuse: TSLVec4Node | null;
    constructor(text: TextColorNodeSource, baseDiffuse?: TSLVec4Node | null);
    /**
     * Sets up the SDF color and opacity computation.
     * Modifies diffuseColor with the computed SDF-based color and alpha.
     *
     * @param {NodeBuilder} builder - The current node builder.
     */
    setup(_builder: NodeBuilder): TSLVec4Node;
}
export default TextColorNode;
/**
 * TSL function for creating a TextColorNode.
 *
 * This node handles SDF-based rendering of text, computing fill and outline
 * colors and opacity based on signed distance fields. It should be used in
 * `material.setupDiffuseColor` to override the diffuse color with SDF rendering.
 *
 * This implementation-level API is intentionally internal and has no public package import.
 */
export declare const textColor: TextColorNodeFactory;