FhotoEditor
FhotoEditor Plugin with simple, easy support for image editing using Filters, Cropping and transformation.
To start with this, we need to simply add the dependencies in the gradle file of our app module like this
Installation
First, add image_editor_plus: as a dependency in your pubspec.yaml file.
Import
import 'package:fhoto_editor/fhoto_editor.dart';
Then run flutter pub get to install the package.
iOS
Add the following keys to your Info.plist file, located in /ios/Runner/Info.plist:
- NSPhotoLibraryUsageDescription – describe why your app needs permission for the photo library. This is called Privacy – Photo Library Usage Description in the visual editor.
<key>NSPhotoLibraryUsageDescription</key>
<string>Used to demonstrate image picker plugin</string>
Key Features
Here is update which already done in PhotoEditing plugin
implement Single filter on given image
implement Multiple filters on given image
Demo
Usage
Single Filter on Image
making an instance for color generator class
final colorGen = ColorFilterGenerator.getInstance();
use it in the ColorFiltered widget as a matrix
ColorFiltered(
colorFilter: ColorFilter.matrix(myFilter.matrix),
child: Image.asset('assets/shahid.jpeg'))
Multiple filters on image
final colorGen = ColorFilterGenerator.getInstance();
ColorMultiFilterGenerator myFilter = ColorMultiFilterGenerator(filters: [
colorGen.getHueMatrix(value: _hueSeekbarValue),
colorGen.getContrastMatrix(value: _contrastSeekbarValue),
colorGen.getBrightnessMatrix(value: _brightnessSeekbarValue),
colorGen.getSaturationMatrix(value: _saturationSeekbarValue),
colorGen.getExposureMatrix(value: _exposureSeekbarValue),
colorGen.getShadowMatrix(value: _shadowSeekbarValue),
colorGen.getHighlightedMatrix(value: _highlightedSeekbarValue),
colorGen.getFadedMatrix(value: _fadedSeekbarValue),
colorGen.getVibrancyMatrix(value: _vibrancySeekbarValue),
colorGen.getTemperatureMatrix(value: _temperatureSeekbarValue),
]);
apply the myFilter instance to colorFiltered widget
colorFilter: ColorFilter.matrix(myFilter.matrix),
child: Image.asset('assets/shahid.jpeg'))
Saving image locally
RenderRepaintBoundary widget to capture a snapshot of a specific area of
the screen and converts it into a ui.Image object.
RenderRepaintBoundary boundary =
_key.currentContext!.findRenderObject() as RenderRepaintBoundary;
ui.Image image = await boundary.toImage();
return image;
}
void saveImage(ui.Image image) async {
// Create a ByteData buffer to hold the image data.
final ByteData? byteData = await image.toByteData(format: ui.ImageByteFormat.png);
final Uint8List pngBytes = byteData!.buffer.asUint8List();
// Get the device's default directory for storing files.
final directory = await getTemporaryDirectory();
// Create a file to write the image data to.
final File file = File('${directory.path}/filtered_image.png');
// Write the image data to the file.
await file.writeAsBytes(pngBytes);
if (kDebugMode) {
print("File Saved:${file.path}");
}
}
Cropping images
Select an image from the image picker and apply sampling to load into memory
late File _file = File("path");
late File _sample = File("path");
Future<void> _openImage() async {
final pickedFile =
await ImagePicker().getImage(source: ImageSource.gallery);
final file = File(pickedFile?.path as String);
/// sampleImage is used here for scale down larger images before loading into memory.
/// preferredSize is being used here for square images
/// context.size?.longestSide.ceil() is to get actual size of height and width of image
final sample = await ImageCrop.getInstance().sampleImage(file: file, preferredSize: context.size?.longestSide.ceil());
setState(() {
_sample = sample;
_file = file;
});
}
use cropImage function to crop the sampled image loaded into memory
final cropKey = GlobalKey<CropViewState>();
late File _lastCropped = File("path");
Future<File?> _cropImage() async {
final scale = cropKey.currentState?.scale;
final area = cropKey.currentState?.area;
if (area == null) {
// cannot crop, widget is not setup
return null;
}
/// scale up to use maximum possible number of pixels
/// this will sample image in higher resolution to make cropped image larger
final sample = await ImageCrop.getInstance().sampleImage(
file: _file,
preferredSize: (2000 / scale!).round(),
);
final file = await ImageCrop.getInstance().cropImage(
file: sample,
area: area,
);
sample.delete();
_lastCropped.delete();
_lastCropped = file;
debugPrint('$file');
return file;
}
show cropped image
Expanded(
child: Image.file(File(croppedFile.path)),
)
Adjusting Hue
ColorFilter.matrix(colorGen.getHueMatrix(value: _seekbarValue)
Brightness
ColorFilter.matrix(colorGen.getBrightnessMatrix(value: _seekbarValue)
Saturation
ColorFilter.matrix(colorGen.getSaturationMatrix(value: _seekbarValue)
Exposure
ColorFilter.matrix(colorGen.getExposureMatrix(value: _seekbarValue)
Shadow
ColorFilter.matrix(colorGen.getShadowMatrix(value: _seekbarValue)
Highlighted
ColorFilter.matrix(colorGen.getHighlightedMatrix(value: _seekbarValue)
Vignette
ColorFilter.matrix(colorGen.getVignetteMatrix(value: _seekbarValue)
Faded
ColorFilter.matrix(colorGen.getFadedMatrix(value: _seekbarValue)
Vibrancy
ColorFilter.matrix(colorGen.getVibrancyMatrix(value: _seekbarValue)
Temperature
ColorFilter.matrix(colorGen.getTemperatureMatrix(value: _seekbarValue)
Contrast
ColorFilter.matrix(colorGen.getContrastMatrix(value: _seekbarValue)
Rotation
double _rotation = 0.0;
bool _isVerticalFlip = false;
rotateWidget(Image.asset("assets/image.jpeg"),_rotation),
Flip
double _rotation = 0.0;
bool _isVerticalFlip = false;
flipWidget(Image.asset("assets/image.jpeg"),_rotation,_isVerticalFlip)
