/**
 * PdfGradientBrush.ts class for EJ2-PDF
 */
import { PdfStreamWriter } from '../../input-output';
import { GetResourceEventHandler } from '../pdf-graphics';
import { PdfColorSpace } from '../enum';
import { PdfColor } from '../pdf-color';
import { PdfBrush } from './pdf-brush';
import { IPdfWrapper, IPdfPrimitive } from '../../../interfaces';
import { PdfDictionary, PdfArray } from '../../primitives';
import { PdfTransformationMatrix } from '../pdf-transformation-matrix';
import { PdfFunction } from '../../general';
/**
 * `PdfGradientBrush` class provides objects used to fill the interiors of graphical shapes such as rectangles,
 * ellipses, pies, polygons, and paths.
 * @private
 */
export declare abstract class PdfGradientBrush extends PdfBrush implements IPdfWrapper {
    /**
     * Local variable to store the background color.
     * @private
     */
    private mbackground;
    /**
     * Local variable to store the stroking color.
     * @private
     */
    private mbStroking;
    /**
     * Local variable to store the dictionary.
     * @private
     */
    private mpatternDictionary;
    /**
     * Local variable to store the shading.
     * @private
     */
    private mshading;
    /**
     * Local variable to store the Transformation Matrix.
     * @private
     */
    private mmatrix;
    /**
     * Local variable to store the colorSpace.
     * @private
     */
    private mcolorSpace;
    /**
     * Local variable to store the function.
     * @private
     */
    private mfunction;
    /**
     * Local variable to store the DictionaryProperties.
     * @private
     */
    private dictionaryProperties;
    /**
     * Initializes a new instance of the `PdfGradientBrush` class.
     * @public
     */
    constructor(shading: PdfDictionary);
    /**
     * Gets or sets the background color of the brush.
     * @public
     */
    get background(): PdfColor;
    set background(value: PdfColor);
    /**
     * Gets or sets a value indicating whether use anti aliasing algorithm.
     * @public
     */
    get antiAlias(): boolean;
    set antiAlias(value: boolean);
    /**
     * Gets or sets the function of the brush.
     * @protected
     */
    protected get function(): PdfFunction;
    protected set function(value: PdfFunction);
    /**
     * Gets or sets the boundary box of the brush.
     * @protected
     */
    protected get bBox(): PdfArray;
    protected set bBox(value: PdfArray);
    /**
     * Gets or sets the color space of the brush.
     * @public
     */
    get colorSpace(): PdfColorSpace;
    set colorSpace(value: PdfColorSpace);
    /**
     * Gets or sets a value indicating whether this PdfGradientBrush is stroking.
     * @public
     */
    get stroking(): boolean;
    set stroking(value: boolean);
    /**
     * Gets the pattern dictionary.
     * @protected
     */
    protected get patternDictionary(): PdfDictionary;
    /**
     * Gets or sets the shading dictionary.
     * @protected
     */
    protected get shading(): PdfDictionary;
    protected set shading(value: PdfDictionary);
    /**
     * Gets or sets the transformation matrix.
     * @public
     */
    get matrix(): PdfTransformationMatrix;
    set matrix(value: PdfTransformationMatrix);
    /**
     * Monitors the changes of the brush and modify PDF state respectfully.
     * @param brush The brush.
     * @param streamWriter The stream writer.
     * @param getResources The get resources delegate.
     * @param saveChanges if set to true the changes should be saved anyway.
     * @param currentColorSpace The current color space.
     */
    monitorChanges(brush: PdfBrush, streamWriter: PdfStreamWriter, getResources: GetResourceEventHandler, saveChanges: boolean, currentColorSpace: PdfColorSpace): boolean;
    /**
     * Resets the changes, which were made by the brush.
     * In other words resets the state to the initial one.
     * @param streamWriter The stream writer.
     */
    resetChanges(streamWriter: PdfStreamWriter): void;
    /**
     * Converts colorspace enum to a PDF name.
     * @param colorSpace The color space enum value.
     */
    private colorSpaceToDeviceName;
    /**
     * Resets the pattern dictionary.
     * @param dictionary A new pattern dictionary.
     */
    protected resetPatternDictionary(dictionary: PdfDictionary): void;
    /**
     * Resets the function.
     */
    abstract resetFunction(): void;
    /**
     * Clones the anti aliasing value.
     * @param brush The brush.
     */
    protected cloneAntiAliasingValue(brush: PdfGradientBrush): void;
    /**
     * Clones the background value.
     * @param brush The brush.
     */
    protected cloneBackgroundValue(brush: PdfGradientBrush): void;
    /**
     * Gets the `element`.
     * @private
     */
    get element(): IPdfPrimitive;
}