Image Filter Pro #

Hi! This is my first package published to help you out! Image Filter Pro is a Flutter package that provides a convenient way to apply color filters to images with preset filter options. The package is written purely in Dart, so no additional setup for specific platforms is required.

Features #

• Apply various preset color filters to images.
• Easily integrate customizable filter UI into your Flutter app.
• Inspired by popular filter presets found in other image editing apps.

Installation #

Add the following dependency to your pubspec.yaml file:

dependencies: image_filter_pro: ^0.1.5

Usage #

Import the package:

import 'package:flutter/material.dart';
import 'package:image_filter_pro/image_filter_pro.dart';

Use the ImageFilterWidget in your widget tree:

class FilteredImageWidget extends StatefulWidget {  
  @override  
  _FilteredImageWidgetState createState() => _FilteredImageWidgetState();  
}  
  
class _FilteredImageWidgetState extends State<FilteredImageWidget> {  
  File? image;  
  
  void _showImagePicker() async {  
    // Implement your image picker logic here  
    // Set the selected image as the imageFile 
    // For example: 
    // var pickedImage = await ImagePicker.pickImage(source: ImageSource.gallery); 
    // setState(() { 
    //   imageFile = pickedImage; 
    // });  
  var updatedImage = await Navigator.of(context).push(  
      MaterialPageRoute(  
        builder: (context) => PhotoFilter(  
          image: imageFile,  
          presets: NamedColorFilter.defaultFilters(),  
          cancelIcon: Icons.cancel,  
          applyIcon: Icons.check,  
          backgroundColor: Colors.black,  
          sliderColor: Colors.blue,  
          sliderLabelStyle: TextStyle(color: Colors.white),  
          bottomButtonsTextStyle: TextStyle(color: Colors.white),  
          presetsLabelTextStyle: TextStyle(color: Colors.white),  
          applyingTextStyle: TextStyle(color: Colors.white),  
        ),  
      ),  
    );  
  
    if (updatedImage != null) {  
      setState(() {  
        this.image = updatedImage;  
      });  
    }  
  }  
  
  @override  
  Widget build(BuildContext context) {  
    return Scaffold(  
      appBar: AppBar(  
        title: Text('Image Filter App'),  
      ),  
      body: Center(  
        child: Column(  
          mainAxisAlignment: MainAxisAlignment.center,  
          children: [  
            ElevatedButton(  
              onPressed: _showImagePicker,  
              child: Text('Pick and Filter Image'),  
            ),  
            if (image != null)  
              Image.file(image!),  
          ],  
        ),  
      ),  
    );  
  }  
}

You can also provide your own set of presets like this:

ImageFilterWidget(
    filters: [
		 // Always add the "default" one
			  NamedColorFilter(  
				colorFilterMatrix: [],  
			    name: "None"),  
			  NamedColorFilter(  
				colorFilterMatrix: [  
					0.8, 0.1, 0.1, 0, 20,  
					0.1, 0.8, 0.1, 0, 20,  
					0.1, 0.1, 0.8, 0, 20,  
					0, 0, 0, 1, 0,  
				  ],  
				name: "Vintage"),  
			  NamedColorFilter(  
				colorFilterMatrix: [  
					1.2, 0.1, 0.1, 0, 10,  
					0.1, 1, 0.1, 0, 10,  
					0.1, 0.1, 1, 0, 10,  
					0, 0, 0, 1, 0,  
				    ],  
				 name: 'Mood'),  
		]
      )

Or if you want to extend:

ImageFilterWidget(
   //...the rest of the params
   filters:  NamedColorFilter.defaultFilters()
              .toList()
              .addAll([ 
					    NamedColorFilter(  
						  colorFilterMatrix: [  
						     0.8, 0.1, 0.1, 0, 20,  
						     0.1, 0.8, 0.1, 0, 20,  
						     0.1, 0.1, 0.8, 0, 20,  
						     0, 0, 0, 1, 0,  
						   ],  
						  name: "Vintage"),  
						 NamedColorFilter(  
						   colorFilterMatrix: [  
						     1.2, 0.1, 0.1, 0, 10,  
						     0.1, 1, 0.1, 0, 10,  
						     0.1, 0.1, 1, 0, 10,  
						     0, 0, 0, 1, 0,  
						   ],  
						   name: 'Mood'),  
					]
        )

By default, the widget will just pop itself when tapping on cancel or apply icons. It is also possible to trigger callback when tapping in cancel or on apply filter:

ImageFilterWidget(
	   //...the rest of the params
	   onCancel: () => // do something,
	   onApply: (File? file) => // do something with file
	   )

Screenshots #

License #

This package is distributed under the MIT License.