import type { WebGLContextManager } from "../../../webgl/context-manager";
import type { SeriesChart } from "../series";
type GL = WebGL2RenderingContext | WebGLRenderingContext;
/**
 * Area glyph for {@link SeriesChart}. Owns its program + per-series
 * strip buffers privately.
 */
export declare class AreaGlyph {
    private _program;
    private _buffers;
    private ensureProgram;
    /**
     * Drop persistent area buffers. Subsequent draws no-op until rebuild.
     */
    invalidateBuffers(chart: SeriesChart): void;
    /**
     * Build per-series strip buffers for area glyphs. Reads stacked
     * y0/y1 from `chart._areaBarIndex` (cached at data load) and
     * unstacked values from `_samples`. Single GPU upload per series;
     * subsequent frames just rebind.
     */
    rebuildBuffers(chart: SeriesChart, glManager: WebGLContextManager): void;
    /**
     * Bind persistent strip buffers and dispatch one TRIANGLE_STRIP per
     * series-run. Skips hidden series.
     */
    draw(chart: SeriesChart, gl: GL, _glManager: WebGLContextManager, projLeft: Float32Array, projRight: Float32Array, opacity: number): void;
    destroy(chart: SeriesChart): void;
}
export {};