import { TileRenderingContext } from '../types';
import LayerAbstractRenderer from './LayerAbstractRenderer';
/**
 * 在 HTMLCanvasElement 上渲染图层的基类
 * @english
 * Base Class to render layer on HTMLCanvasElement
 * @abstract
 * @protected
 * @memberOf renderer
 * @extends Class
 */
declare class CanvasRenderer extends LayerAbstractRenderer {
    gl: TileRenderingContext;
    /**
     * Ask whether the layer renderer needs to redraw
     */
    needToRedraw(): boolean;
    createContext(): void;
    resetCanvasTransform(): void;
    /**
     * Clear the canvas to blank
     */
    clearCanvas(): void;
    clear(): void;
    /**
     * @english
     * Prepare the canvas for rendering. <br>
     * 1. Clear the canvas to blank. <br>
     * 2. Clip the canvas by mask if there is any and return the mask's extent
     * @return {PointExtent} mask's extent of current zoom's 2d point.
     */
    prepareCanvas(): any;
    /**
    * onResize
    * @param  {Object} param event parameters
    */
    onResize(_param: any): void;
}
export default CanvasRenderer;
//# sourceMappingURL=CanvasRenderer.d.ts.map