Core Image and GPUImage filters package for Flutter
A flutter package for iOS and Android for applying filter to image and video. Support all filters from Core Image on iOS.
Installation
Add native_filters
package as a dependency in your pubspec.yaml file.
iOS
No additional configuration required, the plugin work out of the box.
Android
No additional configuration required, the plugin work out of the box.
Example
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:native_filters/native_filters.dart';
import 'package:path_provider/path_provider.dart';
import 'package:uuid/uuid.dart';
void main() => runApp(new MaterialApp(home: MyApp()));
class MyApp extends StatefulWidget {
@override
State<StatefulWidget> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
final _filtersFactory = const FilterFactory();
Filter _filter;
File _output;
Uint8List _data;
String get asset => 'images/test.jpg';
@override
void initState() {
super.initState();
_prepare().then((_) => setState(() {}));
}
Future<void> _prepare() async {
final directory = await getTemporaryDirectory();
final uuid = Uuid();
final path = '${directory.path}/${uuid.v4()}.jpg';
if (defaultTargetPlatform == TargetPlatform.iOS) {
_filter = await _filtersFactory.create('CIPhotoEffectMono');
}
if (defaultTargetPlatform == TargetPlatform.android) {
_filter = await _filtersFactory.create('GPUImageFalseColorFilter');
}
await _filter?.setAssetSource(asset);
_output = File(path);
await _filter?.export(_output);
_data = await _filter?.binaryOutput;
}
@override
void dispose() {
_filtersFactory.dispose(_filter);
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(_filter?.name ?? 'Initializing...'),
),
body: Center(
child: _output == null
? CircularProgressIndicator()
: Column(
children: <Widget>[
Expanded(
child: imagePreview1,
),
SizedBox(height: 3),
Expanded(
child: imagePreview2,
)
],
),
),
);
}
Widget get imagePreview1 {
if (_output != null) {
return Image.file(_output);
}
return Text('Failed to process and save image');
}
Widget get imagePreview2 {
if (_data != null) {
return Image.memory(_data);
}
return Text('Failed to process image');
}
}
Previews
Plugin data types support
The following table shows how to pass values GPUImageFilter:
GPUAttributeClass | Filterable method | Description |
---|---|---|
float | setNum |
|
int | setNum |
|
boolean | setBoolValue |
|
PointF | setPointValue |
|
float[] | setDoubleArrayValue |
|
float[] | setColorValue |
If name of function points on color value |
PointF[] | setPointArrayValue |
The following table shows how to pass values CIFilter:
CIAttributeClass | CIAttributeType | Filterable method | Description |
---|---|---|---|
NSNumber | * | setNum |
|
NSNumber | CIAttributeTypeBoolean | setBoolValue |
|
CIColor | setColorValue |
||
CIVector | CIAttributeTypePosition | setPointValue |
|
CIVector | CIAttributeTypeOffset | setPointValue |
|
CIVector | CIAttributeTypeRectangle | setPointArrayValue |
|
CIVector | CIAttributeTypePosition3 | setDoubleArrayValue |
|
CIVector | setDoubleArrayValue |
||
NSValue | * | setDoubleArrayValue |
Getting Started
This project is a starting point for a Flutter plug-in package, a specialized package that includes platform-specific implementation code for Android and/or iOS.
For help getting started with Flutter, view our online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.