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Image processing library to edit photo programmatically in React Native

Image processing library to edit photo programmatically in React Native

React Native Photo Manipulator

Image processing library to edit photo programmatically in React Native.

Platform Supported

  • [x] Android
  • [x] iOS

Getting started

For react native 0.60 and above

$ yarn add react-native-photo-manipulator

(or)

$ npm install react-native-photo-manipulator

Usage

Import library with

import RNPhotoManipulator from 'react-native-photo-manipulator';

API

Method

Crop and resize

Crop image with cropRegion and resize to targetSize if specified

Signature
static crop(image: ImageSource, cropRegion: Rect, targetSize?: Size) => Promise<string>
Parameter Type Required Description
image ImageSource Yes The image
cropRegion Rect Yes The region of image to be cropped
targetSize Size No The target size of result image
mimeType 'image/jpeg', 'image/png' No Output file format
Returns

Promise with image path in cache directory

Example
const image = "https://unsplash.com/photos/qw6qQQyYQpo/download?force=true";
const cropRegion = { x: 5, y: 30, size: 400, width: 250 };
const targetSize = { size: 200, width: 150 };

PhotoManipulator.crop(image, cropRegion, targetSize).then(path => {
    console.log(`Result image path: ${path}`);
});

result-crop

result-crop-resize

Optimize

Save result image with specified quality between 0 - 100 in jpeg format

Signature
static optimize(image: ImageSource, quality: number) => Promise<string>
Parameter Type Required Description
image ImageSource Yes The image
quality number Yes The quality of result image between 0 - 100
Returns

Promise with image path in cache directory

Example

result-optimize

const image = "https://unsplash.com/photos/qw6qQQyYQpo/download?force=true";
const quality = 90;

PhotoManipulator.optimize(image, 90).then(path => {
    console.log(`Result image path: ${path}`);
});

Overlay Image

Overlay image on top of background image

Signature
static overlayImage(image: ImageSource, overlay: ImageSource, position: Point) => Promise<string>
Parameter Type Required Description
image ImageSource Yes The background image
overlay ImageSource Yes The overlay image
position Point Yes The position of overlay image in background image
mimeType 'image/jpeg', 'image/png' No Output file format
Returns

Promise with image path in cache directory

Example

result-overlay

const image = "https://unsplash.com/photos/qw6qQQyYQpo/download?force=true";
const overlay = "https://www.iconfinder.com/icons/1174949/download/png/128";
const position = { x: 5, y: 20 };

PhotoManipulator.overlayImage(image, overlay, position).then(path => {
    console.log(`Result image path: ${path}`);
});

Print Text

Print texts into image

Signature
static printText(image: ImageSource, texts: TextOptions[]) => Promise<string>
Parameter Type Required Description
image ImageSource Yes The image
texts TextOptions[] Yes The list of text operations
mimeType 'image/jpeg', 'image/png' No Output file format
Returns

Promise with image path in cache directory

Example

result-print-text

const image = "https://unsplash.com/photos/qw6qQQyYQpo/download?force=true";
const texts = [
    { position: { x: 50, y: 30 }, text: "Text 1", textSize: 30, color: "#000000" },
    { position: { x: 50, y: 30 }, text: "Text 1", textSize: 30, color: "#FFFFFF", thickness: 3 }
];

PhotoManipulator.printText(image, texts).then(path => {
    console.log(`Result image path: ${path}`);
});

Batch

Crop, resize and do operations (overlay and printText) on image

Signature
static batch(image: ImageSource, operations: PhotoBatchOperations[], cropRegion: Rect, targetSize?: Size, quality?: number) => Promise<string>
Parameter Type Required Description
image ImageSource Yes The image
operations PhotoBatchOperations[] Yes The list of operations
cropRegion Rect Yes The region of image to be cropped
targetSize Size No The target size of result image
quality number No The quality of result image between 0 - 100
mimeType 'image/jpeg', 'image/png' No Output file format
Returns

Promise with image path in cache directory

Example

result-batch

const image = "https://unsplash.com/photos/qw6qQQyYQpo/download?force=true";
const cropRegion = { x: 5, y: 30, size: 400, width: 250 };
const targetSize = { size: 200, width: 150 };
const operations = [
    { operation: "text", options: { position: { x: 50, y: 30 }, text: "Text 1", textSize: 30, color: "#000000" } },
    { operation: "overlay", overlay: "https://www.iconfinder.com/icons/1174949/download/png/128", position: { x: 5, y: 20 } },
];
const quality = 90;

PhotoManipulator.batch(image, cropRegion, targetSize, operations, quality).then(path => {
    console.log(`Result image path: ${path}`);
});

Types

ImageSource

Image resource can be url or require()

Type Description
number Image from require('path/to/image')
string Image from url supports file://, http://, https:// and ftp://

PhotoBatchOperations

Represent overlay image or print text operation

PhotoBatchOverlay

Overlay image batch operation

Property Type Description
operation "overlay"
overlay ImageSource The overlay image
position Point he position of overlay image in background image

PhotoBatchPrintText

Print text batch operation

Property Type Description
operation "text"
options TextOptions The text attributes

Point

Represent position (x, y) from top-left of image

Property Type Description
x number The x-axis coordinate from top-left
y number The y-axis coordinate from top-left

Rect

Represent area of region

Property Type Description
x number The x-axis coordinate from top-left
y number The y-axis coordinate from top-left
width number The width of the region
height number The height of the region

Size

Represent size (width, height) of region or image

Property Type Description
width number The width of the region
height number The height of the region

TextOptions

Represent attributes of text such as text, color, size, and etc.

Property Type Description
position Point The position of the text in background image
text string The value of the text
textSize number The size of the text
color string The color of the text
thickness number The thickness (border width) of the region

GitHub

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