/react-native-image-marker

Add text or icon watermark to your images

Primary LanguageJavaScript

react-native-image-marker npm version PRs Welcome

Add text or icon watermark to your images

sample

 

Installation

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

iOS Pod Install

You can use pod instead of link. Add following lines in your Podfile:

pod 'RNImageMarker', :path => '../node_modules/react-native-image-marker'

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
text the text you want to mark with
position text position(topLeft,topRight,topCenter, center, bottomLeft, bottomCenter, bottomRight)
X distance from the left, if you have set position yet you don't need to set this property again
Y distance from the top, if you have set position you don't need to set this property again
color text color
fontName fontName
fontSize fontSize
shadowStyle text's shadow style: iOS's NSShadowAttributeName, Android's textPaint.shadowLayerStyle
scale scale image
quality image qulaity
filename set filename for the result
  • ImageMarkOption
name description
src image url
markerSrc the icon you want to mark with
position text position(topLeft,topRight,topCenter, center, bottomLeft, bottomCenter, bottomRight)
X distance from the left, if you have set position yet you don't need to set this property again
Y distance from the top, if you have set position you don't need to set this property again
markerScale scale icon
scale scale image
quality image qulaity
filename set filename for the result
  • ShadowStyle
name description
radius blur radius
dx x offset
dy y offset
color shadow color

Usage

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

···
// add text watermark to a photo

 this.setState({
    loading: true
 })
 Marker.markText({
    src: img.uri,
    text: 'text marker', 
    X: 30,
    Y: 30, 
    color: '#FF0000',
    fontName: 'Arial-BoldItalicMT', 
    fontSize: 44, 
    shadowStyle: {
        dx: 10.5,
        dy: 20.8,
        radius: 20.9,
        color: '#ff00ff'
    },
    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: 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
    })
})

// add icon watermark to a photo

const iconUri = icon.uri
const backGroundUri = 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
    })
})

// you can also add watermark to a photo with static images
Marker.markImage({
    src: backGroundUri, 
    markerSrc: require('./icon.png'), 
    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
    })
})
// or base64
Marker.markImage({
    src: { uri: `data:img/jpg;base64,/9j/4qqqAQSkZJRgABAQEBLAEsAAD/2wBDAAIBAQEBAQIBAQECAgICAgQDAgICAgUEBAMEBgUGBgYFBgYGBwkIBgcJBwYGCAsICQoKCgoKBggLDAsKDAkKCgr/2wBDAQICAgICAgUDAwUKBwYHCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgr/wAARCAHnAooDASIA
AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgddddcI` }, 
    markerSrc: { uri: `data:img/jpg;base64,/9j/4AAQSkZJRgABAQEBLAEsAAD/2wBDAAIBAQEBAQIBAQECAgICAgQDAgICAgUEBAMEBgUGBgYFBgYGBwkIBgcJBwYGCAsICQoKCgoKBggLDAsKDAkKCgr/2wBDAQICAgICAgUDAwUKBwYHCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgr/wAARCAHnAooDASIA
AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcI` }, 
    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 @Peretz30 @gaoxiaosong @onka13 @OrangeFlavoredColdCoffee

Example

example