flutter_image_clip 0.1.0
flutter_image_clip: ^0.1.0 copied to clipboard
A reusable Flutter image clipping library with a ready-to-use crop editor UI and pure Dart image processing APIs.
flutter_image_clip #
flutter_image_clip 是一个 Flutter 图片裁剪与位图处理库,提供可直接打开的裁剪 UI、可嵌入页面的裁剪组件,以及纯 Dart 图像处理 API。
功能 #
showImageClipEditor:一行代码打开完整裁剪界面。ImageClipEditor:可嵌入业务页面的裁剪 Widget。- 手势支持:拖动、双指缩放、鼠标滚轮缩放、双击复位。
- 裁剪模式:Portrait / Landscape、Fit / Fill、90 度旋转。
- 图像处理:解码、中心裁剪、区域裁剪、旋转、翻转、缩放、调色、PNG 导出。
- 处理任务通过 Flutter
compute执行,降低 UI isolate 压力。
安装 #
发布到 pub.dev 后,在业务项目的 pubspec.yaml 中添加:
dependencies:
flutter_image_clip: ^0.1.0
然后执行:
flutter pub get
如果发布前需要本地调试,可以临时使用 path 依赖:
dependencies:
flutter_image_clip:
path: /Users/admin/Desktop/demos/flutter_image_clip_demo
使用裁剪 UI #
import 'package:flutter_image_clip/flutter_image_clip.dart';
final result = await showImageClipEditor(
context,
imageBytes: bytes,
imageLabel: 'avatar.jpg',
);
if (result != null) {
final croppedBytes = result.cropped.bytes;
final region = result.region;
final rotationDegrees = result.rotationDegrees;
}
ImageClipResult 返回结构:
{
source: EditedImage(...),
cropped: EditedImage(...),
region: CropRegion(
x: 120,
y: 0,
width: 480,
height: 640,
cornerRadius: 0,
),
rotationDegrees: 90,
}
嵌入页面 #
ImageClipEditor(
initialImageBytes: bytes,
initialImageLabel: 'cover.jpg',
showResultPage: false,
onResult: (result) {
final croppedBytes = result.cropped.bytes;
},
)
使用图像处理 API #
final processor = ImageProcessor();
final image = await processor.decodeBytes(bytes, label: 'input.jpg');
final cropped = await processor.cropRegion(
image,
const CropRegion(x: 20, y: 20, width: 240, height: 240, cornerRadius: 0),
);
final rotated = await processor.rotate(cropped, degrees: 90);
final adjusted = await processor.adjustColor(
rotated,
const ColorAdjustment(brightness: 1.05, contrast: 1.1, saturation: 0.95),
);
final png = await processor.exportPng(adjusted);
本地开发 #
flutter pub get
dart format lib test example
flutter analyze
flutter test
flutter pub publish --dry-run
flutter run -t example/lib/main.dart
许可证 #
MIT License。详见 LICENSE。