import { type GradientStop } from "../theme/gradient";
import type { WebGLContextManager } from "./context-manager";
export interface GradientTextureCache {
    texture: WebGLTexture;
    lastStops: GradientStop[] | null;
}
/**
 * Allocate a 256×1 RGBA8 texture (once) and re-upload the LUT only when
 * `stops` has changed since the last call. Typical render path: zero
 * GPU work beyond binding an already-uploaded texture.
 */
export declare function ensureGradientTexture(glManager: WebGLContextManager, cache: GradientTextureCache | null, stops: GradientStop[]): GradientTextureCache;
/**
 * Bind `texture` to a texture unit and set the sampler uniform. Call after
 * `useProgram`.
 */
export declare function bindGradientTexture(glManager: WebGLContextManager, texture: WebGLTexture, samplerLoc: WebGLUniformLocation | null, unit?: number): void;