import type { WebGlShaderType } from '../../renderers/webgl/WebGlShaderNode.js';
/**
 * SdfShader supports multi-channel and single-channel signed distance field textures.
 *
 * @remarks
 * All per-glyph data (position, color, distance range) is provided via vertex
 * attributes so that multiple text nodes sharing the same font atlas can be
 * batched into a single draw call.
 *
 * This Shader is used by the {@link SdfTextRenderer}. Do not use this Shader
 * directly. Instead create a Text Node and assign a SDF font family to it.
 */
export declare const Sdf: WebGlShaderType;