import { default as p5ex } from '../p5exInterface';
/**
 * Draws a sine wave.
 * @param p
 * @param drawingLength
 * @param peakToPeakAmplitude
 * @param waveLength
 */
export declare function drawSineWave(p: p5ex, drawingLength: number, peakToPeakAmplitude: number, waveLength: number): void;
/**
 * Set color to the specified pixel.
 * Should be used in conjunction with loadPixels() and updatePixels().
 * @param renderer - Instance of either p5 or p5.Graphics.
 * @param x - The x index of the pixel.
 * @param y - The y index of the pixel.
 * @param red - The red value (0 - 255).
 * @param green - The green value (0 - 255).
 * @param blue - The blue value (0 - 255).
 * @param pixelDensity - If not specified, renderer.pixelDensity() will be called.
 */
export declare function setPixel(renderer: p5 | p5.Graphics, x: number, y: number, red: number, green: number, blue: number, alpha: number, pixelDensity?: number): void;
/**
 * Lerp color to the specified pixel. The alpha channel remains unchanged.
 * Should be used in conjunction with loadPixels() and updatePixels().
 * @param renderer - Instance of either p5 or p5.Graphics.
 * @param x - The x index of the pixel.
 * @param y - The y index of the pixel.
 * @param red - The red value (0 - 255).
 * @param green - The green value (0 - 255).
 * @param blue - The blue value (0 - 255).
 * @param pixelDensity - If not specified, renderer.pixelDensity() will be called.
 * @param lerpRatio - The lerp ratio (0 - 1). If 1, the color will be replaced.
 */
export declare function lerpPixel(renderer: p5 | p5.Graphics, x: number, y: number, red: number, green: number, blue: number, pixelDensity?: number, lerpRatio?: number): void;
/**
 * Fill the canvas or graphics (according to p.currentRenderer) with gradation.
 * @param p
 * @param backgroundColor
 * @param fromColor
 * @param toColor
 * @param lerpRatioExponent
 */
export declare function gradationBackground(p: p5ex, backgroundColor: p5.Color, fromColor: p5.Color, toColor: p5.Color, lerpRatioExponent?: number): void;
/**
 * Sets the specified color (default: black) to each pixel with a random alpha value.
 * @param renderer - Instance of either p5 or p5.Graphics.
 * @param {number} maxAlpha - The max value of alpha channel (1 - 255).
 * @param {boolean} [blend] - Set true for blending, false for replacing.
 * @param {number} [red]
 * @param {number} [green]
 * @param {number} [blue]
 */
export declare function applyRandomTexture(renderer: p5 | p5.Graphics, maxAlpha: number, blend?: boolean, red?: number, green?: number, blue?: number): p5 | p5.Graphics;