bitmap 0.2.0 
bitmap: ^0.2.0 copied to clipboard
blue-fire.xyzBitmap is a fast and minimalistic lib that heelps you to manipulate image on Flutter apps.
import 'dart:async';
import 'package:bitmap/bitmap.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Image',
theme: ThemeData(
primarySwatch: Colors.orange,
),
home: MyHomePage(
title: "Pans",
),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({
Key? key,
required this.title,
}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
ImageValueNotifier imageValueNotifier = ImageValueNotifier();
@override
void initState() {
super.initState();
imageValueNotifier.loadImage();
}
void flipHImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.flipHImage();
}
}
void flipVImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.flipVImage();
}
}
void rotateClockwiseImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.rotateClockwiseImage();
}
}
void rotateCounterClockwiseImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.rotateCounterClockwiseImage();
}
}
void rotate180Image() {
if (imageValueNotifier.value != null) {
imageValueNotifier.rotate180Image();
}
}
void contrastImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.contrastImage();
}
}
void brightnessImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.brightnessImage();
}
}
void adjustColorImage() {
if (imageValueNotifier.value != null) {
imageValueNotifier.adjustColorImage();
}
}
void batchOperations() {
if (imageValueNotifier.value != null) {
imageValueNotifier.batchOperations();
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: GestureDetector(
onTap: () {
imageValueNotifier.reset();
},
child: Center(
child: ValueListenableBuilder<Bitmap?>(
valueListenable: imageValueNotifier,
builder: (BuildContext context, Bitmap? bitmap, Widget? child) {
if (bitmap == null) {
return const CircularProgressIndicator();
}
return Column(
children: <Widget>[
SafeArea(
top: true,
child: Image.memory(
bitmap.buildHeaded(),
),
),
const Text("Tap image to reset"),
Text("ImageSize ${bitmap.width}"),
],
);
},
),
),
),
floatingActionButton: Buttons(
flipHImage: flipHImage,
flipVImage: flipVImage,
rotateClockwiseImage: rotateClockwiseImage,
rotateCounterClockwiseImage: rotateCounterClockwiseImage,
rotate180Image: rotate180Image,
contrastImage: contrastImage,
brightnessImage: brightnessImage,
adjustColorImage: adjustColorImage,
batchOperations: batchOperations,
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class Buttons extends StatelessWidget {
const Buttons({
Key? key,
required this.flipHImage,
required this.flipVImage,
required this.rotateClockwiseImage,
required this.rotateCounterClockwiseImage,
required this.rotate180Image,
required this.contrastImage,
required this.brightnessImage,
required this.adjustColorImage,
required this.batchOperations,
}) : super(key: key);
final VoidCallback flipHImage;
final VoidCallback flipVImage;
final VoidCallback rotateClockwiseImage;
final VoidCallback rotateCounterClockwiseImage;
final VoidCallback rotate180Image;
final VoidCallback contrastImage;
final VoidCallback brightnessImage;
final VoidCallback adjustColorImage;
final VoidCallback batchOperations;
@override
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.symmetric(horizontal: 20),
child: Column(
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Row(
children: <Widget>[
TextButton(
onPressed: flipHImage,
child: const Text(
"Flip horizontal",
style: TextStyle(fontSize: 10),
),
),
TextButton(
onPressed: flipVImage,
child: const Text(
"Flip vertical",
style: TextStyle(fontSize: 10),
),
),
TextButton(
onPressed: contrastImage,
child: const Text(
"Contrast +",
style: TextStyle(fontSize: 10),
),
),
],
),
Row(
children: <Widget>[
TextButton(
onPressed: brightnessImage,
child: const Text(
"Brightness +",
style: TextStyle(fontSize: 10),
),
),
TextButton(
onPressed: adjustColorImage,
child: const Text(
"AdjustColor +",
style: TextStyle(fontSize: 10),
),
),
],
),
Row(
children: <Widget>[
TextButton(
onPressed: rotateClockwiseImage,
child: const Text(
"Rotate Clock +",
style: TextStyle(fontSize: 10),
),
),
TextButton(
onPressed: rotateCounterClockwiseImage,
child: const Text(
"Rotate Clock -",
style: TextStyle(fontSize: 10),
),
),
TextButton(
onPressed: rotate180Image,
child: const Text(
"Rotate 180",
style: TextStyle(fontSize: 10),
),
),
],
),
Row(
children: <Widget>[
TextButton(
onPressed: batchOperations,
child: const Text(
"Batch operations (saturation + crop)",
style: TextStyle(fontSize: 10),
),
),
],
),
],
),
);
}
}
// stores headless contents
class ImageValueNotifier extends ValueNotifier<Bitmap?> {
ImageValueNotifier() : super(null);
late Bitmap initial;
void reset() {
value = initial;
}
void loadImage() async {
const ImageProvider imageProvider = const AssetImage("assets/street.jpg");
value = await Bitmap.fromProvider(imageProvider);
initial = value!;
}
void flipHImage() async {
final temp = value!;
value = null;
final Uint8List converted = await compute(
flipHImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width, temp.height, converted);
}
void flipVImage() async {
final temp = value!;
value = null;
final converted = await compute(
flipVImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width, temp.height, converted);
}
void rotateClockwiseImage() async {
final temp = value!;
value = null;
final converted = await compute(
rotateClockwiseImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.height, temp.width, converted);
}
void rotateCounterClockwiseImage() async {
final temp = value!;
value = null;
final converted = await compute(
rotateCounterClockwiseImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.height, temp.width, converted);
}
void rotate180Image() async {
final temp = value!;
value = null;
final converted = await compute(
rotate180ImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width, temp.height, converted);
}
void contrastImage() async {
final temp = value!;
value = null;
final Uint8List converted = await compute(
contrastImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width, temp.height, converted);
}
void brightnessImage() async {
final temp = value!;
value = null;
final Uint8List converted = await compute(
brightnessImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width, temp.height, converted);
}
void adjustColorImage() async {
final temp = value!;
value = null;
final Uint8List converted = await compute(
adjustColorsImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width, temp.height, converted);
}
void batchOperations() async {
final temp = value!;
value = null;
final Uint8List converted = await compute(
batchOperationsImageIsolate,
[temp.content, temp.width, temp.height],
);
value = Bitmap.fromHeadless(temp.width - 20, temp.height - 20, converted);
}
}
Future<Uint8List> flipHImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final returnBitmap = bigBitmap.apply(BitmapFlip.horizontal());
return returnBitmap.content;
}
Future<Uint8List> flipVImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap = bigBitmap.apply(BitmapFlip.vertical());
return returnBitmap.content;
}
Future<Uint8List> rotateClockwiseImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap = bigBitmap.apply(BitmapRotate.rotateClockwise());
return returnBitmap.content;
}
Future<Uint8List> rotateCounterClockwiseImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap =
bigBitmap.apply(BitmapRotate.rotateCounterClockwise());
return returnBitmap.content;
}
Future<Uint8List> rotate180ImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap = bigBitmap.apply(BitmapRotate.rotate180());
return returnBitmap.content;
}
Future<Uint8List> contrastImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final returnBitmap = bigBitmap.apply(BitmapContrast(1.2));
return returnBitmap.content;
}
Future<Uint8List> brightnessImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap = bigBitmap.apply(BitmapBrightness(0.1));
return returnBitmap.content;
}
Future<Uint8List> adjustColorsImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap = bigBitmap.apply(
BitmapAdjustColor(
blacks: 0x00000000,
saturation: 1.9, // 0 and 5 mid 1.0
),
);
return returnBitmap.content;
}
Future<Uint8List> batchOperationsImageIsolate(List imageData) async {
final Uint8List byteData = imageData[0];
final int width = imageData[1];
final int height = imageData[2];
final Bitmap bigBitmap = Bitmap.fromHeadless(width, height, byteData);
final Bitmap returnBitmap = bigBitmap.applyBatch([
BitmapAdjustColor(
saturation: 1.9,
),
BitmapCrop.fromLTWH(
left: 10,
top: 10,
width: width - 20,
height: height - 20,
),
]);
return returnBitmap.content;
}Metadata
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Metadata
Bitmap is a fast and minimalistic lib that heelps you to manipulate image on Flutter apps.
Repository (GitHub)
View/report issues
Topics
Documentation
License
MIT (LICENSE)
