CustomPaint drawPath in iOS the Path will automatically close itself. #134816
Description
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
When I use the following code to draw a Path, the Path is closed, but I did not close it.
void paint(Canvas canvas, Size size) {
final path = Path();
path.moveTo(0, 0);
path.lineTo(0, size.height);
path.lineTo(size.width, size.height);
path.lineTo(size.width, 0);
final paint = Paint()
..color = Colors.black
..strokeCap = StrokeCap.round
..strokeWidth = 1
..style = PaintingStyle.stroke;
canvas.drawPath(path, paint);
}
When I slightly adjusted the coordinates of the last 'lineTo,' something magical happened, and everything returned to normal.
void paint(Canvas canvas, Size size) {
final path = Path();
path.moveTo(0, 0);
path.lineTo(0, size.height);
path.lineTo(size.width, size.height);
path.lineTo(size.width, 0.0000000000001);
final paint = Paint()
..color = Colors.black
..strokeCap = StrokeCap.round
..strokeWidth = 1
..style = PaintingStyle.stroke;
canvas.drawPath(path, paint);
}
The same code runs correctly on macOS and Android systems.
Expected results
I expect the Path to be drawn correctly.
Actual results
the Path is closed, but I did not close it.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: Text(widget.title),
),
body: Center(
child: CustomPaint(
size: const Size(150, 100),
painter: _MyPainter(),
),
),
// This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class _MyPainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
final path = Path();
path.moveTo(0, 0);
path.lineTo(0, size.height);
path.lineTo(size.width, size.height);
path.lineTo(size.width, 0);
final paint = Paint()
..color = Colors.black
..strokeCap = StrokeCap.round
..strokeWidth = 1
..style = PaintingStyle.stroke;
canvas.drawPath(path, paint);
}
@override
bool shouldRepaint(CustomPainter oldDelegate) {
return false;
}
}
Screenshots or Video
Screenshots / Video demonstration
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.13.3, on macOS 13.1 22C65 darwin-arm64, locale zh-Hans-CN)
• Flutter version 3.13.3 on channel stable at /Users/robot/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 2524052335 (9 days ago), 2023-09-06 14:32:31 -0700
• Engine revision b8d35810e9
• Dart version 3.1.1
• DevTools version 2.25.0
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
• Android SDK at /Users/robot/Library/Android/sdk
• Platform android-33, build-tools 33.0.1
• ANDROID_HOME = /Users/robot/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14E222b
• CocoaPods version 1.12.1
[✓] Android Studio (version 3.6)
• Android Studio at /Applications/Android Studio 3.6.2.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
[✓] Android Studio (version 2022.2)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)
[✓] VS Code (version 1.82.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.72.0
[✓] Connected device (3 available)
• SunHWiPhone (mobile) • 00008101-00092534260A001E • ios • iOS 16.6.1 20G81
• iPhone 14 Pro Max (mobile) • E0D44BF2-C236-4BF2-B536-634D419601AD • ios •
com.apple.CoreSimulator.SimRuntime.iOS-16-4 (simulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 13.1 22C65 darwin-arm64
! Error: (null) needs to connect to determine its availability. Check the connection between the device and its
companion iPhone, and the connection between the iPhone and Xcode. Both devices may also need to be restarted and
unlocked. (code 1)
[✓] Network resources
• All expected network resources are available.
• No issues found!Metadata
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High-priority issues at the top of the work listImpeller rendering backend issues and features requestsflutter/engine related. See also e: labels.Found to occur in 3.13Found to occur in 3.14The issue has been confirmed reproducible and is ready to work oniOS applications specificallyOwned by Engine teamTriaged by Engine team