NativeScript-Image-Filters

Nativescript plugin for native image filters.

Sample

Installation

From your command prompt/termial go to your app's root folder and execute:

NativeScript Version 7+: tns plugin add nativescript-image-filters

NativeScript Verion prior to 7: tns plugin add nativescript-image-filters@3.0.0

Usage

TS

import { Frame, Image, ImageSource } from '@nativescript/core';
import { ImageFilters } from 'nativescript-image-filters';

const filters = new ImageFilters();

public effectOne() {
  const pic = Frame.topmost().getViewById('myPicture') as Image;

      filters.invert(pic).then((result: ImageSource) => {

      // set the pic src equal to the new imageSource result from the filter method promise result
      pic.src = result;

    }).catch((err) => {
      console.log('applyFilter ERROR: ' + err);
    });
}

IMPORTANT NOTE

Not all methods have been tested. The code needs to be cleaned up to reduce duplication in methods. The methods also need to be 1:1 for common methods. Right now not all iOS & Android methods are named correctly for the image filter. Pull requests are very welcome to improve the API for this plugin.

API

• highlightImage(img: Image, color: string, radius?: number): Promise<ImageSource>
• invert(img: Image): Promise<ImageSource>
• blackAndWhite(img: Image): Promise<ImageSource>
• gamma(img: Image, red: number, green: number, blue: number): Promise<ImageSource>
• colorFilter(img: Image, red: number, green: number, blue: number): Promise<ImageSource>
• sepiaEffect(img: Image, depth: number, red: number, green: number, blue: number): Promise<ImageSource>
• decreaseColorDepth(img: Image, bitOffset: number): Promise<ImageSource>
• contrast(img: Image, value: number): Promise<ImageSource>
• rotate(img: Image, degree: number): Promise<ImageSource>
• brightness(img: Image, value: number): Promise<ImageSource>
• gaussianBlur(img: Image): Promise<ImageSource>
• createShadow(img: Image): Promise<ImageSource>
• sharpen(img: Image, weight: number): Promise<ImageSource>
• meanRemoval(img: Image): Promise<ImageSource>
• smooth(img: Image, value: number): Promise<ImageSource>
• emboss(img: Image): Promise<ImageSource>
• engrave(img: Image): Promise<ImageSource>
• boost(img: Image, type: number, percent: number): Promise<ImageSource>
• roundCorner(img: Image, round: number): Promise<ImageSource>
• waterMark(img: Image, watermark: string, location: android.graphic.Point, color: string, alpha: number, size: number, underline: boolean): Promise<ImageSource>
• flip(img: Image, type: number): Promise<ImageSource>
• tintImage(img: Image, degree: number): Promise<ImageSource>
• fleaEffect(img: Image): Promise<ImageSource>
• blackFilter(img: Image): Promise<ImageSource>
• snowEffect(img: Image): Promise<ImageSource>
• shadingFilter(img: Image, shadingColor: number): Promise<ImageSource>
• saturationFilter(img: Image, level: number): Promise<ImageSource>
• hueFilter(img: Image, level: number): Promise<ImageSource>
• reflection(img: Image): Promise<ImageSource>
• replaceColor(img: Image, fromColor: string, toColor: string): Promise<ImageSource>