react-native-image-marker

Add watermark to the image with text and icon

sample

   

Installation

• npm install react-native-image-marker --save
• react-native link

API

name	parameter	return	decription
markText	TextMarkOption	Promise<String>	mark image with text
markImage	ImageMarkOption	Promise<String>	mark image with icon

• TextMarkOption

name	description
src	image url (Android only support local image)
text	the text you want to mark with
position	text position(topLeft,topRight,topCenter, center, bottomLeft, bottomCenter, bottomRight)
X	distance to the left, if you set position you don't need to set this property
Y	distance to the top,if you set position you don't need to set this property
color	text color
fontName	fontName
fontSize	fontSize
scale	scale image
quality	image qulaity

• ImageMarkOption

name	description
src	image url (Android only support local image)
markerSrc	the icon you want to mark with (Android only support local image)
position	text position(topLeft,topRight,topCenter, center, bottomLeft, bottomCenter, bottomRight)
X	distance to the left, if you set position you don't need to set this property
Y	distance to the top, if you set position you don't need to set this property
markerScale	scale icon
scale	scale image
quality	image qulaity

Usage

import ImageMarker from "react-native-image-marker"

···
// mark text on image

 this.setState({
    loading: true
 })
 Marker.markText({
    src: Platform.OS == 'android'? img.uri.replace('file://', '') : img.uri,, 
    text: 'text marker', 
    X: 30,
    Y: 30, 
    color: '#FF0000',
    fontName: 'Arial-BoldItalicMT', 
    fontSize: 44, 
    scale: 1, 
    quality: 100
 }).then((res) => {
     this.setState({
        loading: false,
        markResult: res
     })
    console.log("the path is"+res)
 }).catch((err) => {
    console.log(err)
    this.setState({
        loading: false,
        err
    })
 })

···
this.setState({
    loading: true
})
Marker.markText({
    src: Platform.OS == 'android'? img.uri.replace('file://', '') : img.uri,, 
    text: 'text marker', 
    position: 'topLeft', 
    color: '#FF0000',
    fontName: 'Arial-BoldItalicMT', 
    fontSize: 44, 
    scale: 1, 
    quality: 100
}).then((res) => {
    console.log("the path is"+res)
    this.setState({
        loading: false,
        markResult: res
    })
}).catch((err) => {
    console.log(err)
    this.setState({
        loading: false,
        err
    })
})

// mark icon on image

const iconUri = Platform.OS == 'android'? icon.uri.replace('file://', '') : icon.uri
const backGroundUri = Platform.OS == 'android'? img.uri.replace('file://', '') : img.uri
this.setState({
    loading: true
})

Marker.markImage({
    src: backGroundUri, 
    markerSrc: iconUri, // icon uri
    X: 100, // left
    Y: 150, // top
    scale: 1, // scale of bg
    markerScale: 0.5, // scale of icon
    quality: 100 // quality of image
}).then((path) => {
    this.setState({
        uri: Platform.OS === 'android' ? 'file://' + path : path,
        loading: false
    })
}).catch((err) => {
    console.log(err, 'err')
    this.setState({
        loading: false,
        err
    })
})

Marker.markImage({
    src: backGroundUri, 
    markerSrc: iconUri, 
    position: 'topLeft',  // topLeft, topCenter,topRight, bottomLeft, bottomCenter , bottomRight, center
    scale: 1, 
    markerScale: 0.5, 
    quality: 100
}).then((path) => {
    this.setState({
        uri: Platform.OS === 'android' ? 'file://' + path : path,
        loading: false
    })
}).catch((err) => {
    console.log(err, 'err')
     this.setState({
        loading: false,
        err
    })
})

Save image to file

• If you want to save the new image result to the phone camera roll, just use the CameraRoll-module from react-native.
• If you want to save it to an arbitrary file path, use something like react-native-fs.
• For any more advanced needs, you can write your own (or find another) native module that would solve your use-case.

Contributors

@filipef101 @mikaello

Example

example