type ScanlineCallback = (y: number, xStart: number, xEnd: number, uStart: number, vStart: number, duDx: number, dvDx: number) => void;
/** Fills a horizontal scanline span with shaded pixels. */
export declare class ScanlineFill {
    #private;
    /**
     * Rasterizes a triangle defined by three screen-space integer points.
     * Calls callback once per scanline with barycentric start values and
     * per-pixel deltas, relative to the original vertex order (u->v1, v->v2).
     */
    fill(x1: number, y1: number, x2: number, y2: number, x3: number, y3: number, width: number, height: number, callback: ScanlineCallback): void;
}
export {};
//# sourceMappingURL=ScanlineFill.d.ts.map