image_painter

pub package style: effective dart Platform Badge License: MIT

A flutter implementation of painting over image.

Overview

demo!

Features

  • Seven available paint modes. Line, Box/Rectangle, Circle, Freestyle/Signature, Dotted Line, Arrow and Text.
  • Four constructors for adding image from Network Url, Asset Image, Image from file and from memory.
  • Controls from constructors like strokeWidth and Colors.
  • Export image as memory bytes which can be converted to image. Implementation provided on example
  • Ability to undo and clear drawings.

Note Tested and working only on flutter stable channel. Please make sure you are on stable channel of flutter before using the package.

Getting started

In the pubspec.yaml of your flutter project, add the following dependency:

dependencies:
  ...
  image_painter: latest

In your library add the following import:

import 'package:image_painter/image_painter.dart';

For help getting started with Flutter, view the online documentation.

Using the library

Check out the example

Basic usage of the libary:

  • ImagePainter.network: Painting over image from network url.
///Initialize the controller
Controller imageController = Controller();
GlobalKey<ImagePainterState> _imageKey = GlobalKey<ImagePainterState>();
///Provide controller to the painter.
ImagePainter.network("https://sample_image.png",
                  key: _imageKey, controller: imageController, scalable: true),
///To change color, strokewidth or paint mode: 
setState((){
    imageController = imageController.copyWith(color:Colors.red);
    imageController = imageController.copyWith(mode:PaintMode.Arrow);
    imageController = imageController.copyWith(strokeWidth:10.0);
})
///Export the image:
Uint8List image = await _imageKey.currentState.exportImage();
///Now you use [Uint8List] data and convert it to file.
File imgFile = new File('directory/sample.png');
    imgFile.writeAsBytesSync(image);

For more thorough implementation guide, check the example.

Libraries

image_painter