[Linux] Not clearing backbuffer before drawing. #143408
Description
On the main branch, I created this very simple Flutter app:
import 'package:flutter/material.dart';
/// Flutter code sample for [MenuAnchor].
void main() {
debugFocusChanges = false;
runApp(const MenuApp());
}
class MenuApp extends StatelessWidget {
const MenuApp({super.key});
@override
Widget build(BuildContext context) {
final ThemeData theme = ThemeData.from(colorScheme: const ColorScheme.light());
return MaterialApp(
theme: theme,
home: Center(
child: Column(
children: <Widget>[
FilledButton.tonal(
onPressed: () { },
child: const Text('Tonal'),
),
FilledButton.tonalIcon(
onPressed: () { },
icon: const Icon(Icons.add),
label: const Text('TonalIcon'),
),
],
),
),
);
}
}And ran it on my Linux machine, I got a window that didn't clear the backbuffer when switching buffers, leaving an interesting artifact filled image.
output.mp4
flutter doctor -v
[✓] Flutter (Channel main, 3.20.0-7.0.pre.31, on Debian GNU/Linux rodete 6.5.13-1rodete2-amd64, locale en_US.UTF-8)
• Flutter version 3.20.0-7.0.pre.31 on channel main at /usr/local/google/home/gspencer/code/flutter
• Upstream repository [email protected]:flutter/flutter.git
• Framework revision 5025681129 (57 minutes ago), 2024-02-13 21:48:41 +0000
• Engine revision 0091a4914d
• Dart version 3.4.0 (build 3.4.0-138.0.dev)
• DevTools version 2.33.0-dev.6
[✓] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
• Android SDK at /usr/local/google/home/gspencer/Android/Sdk
• Platform android-33, build-tools 32.1.0-rc1
• ANDROID_HOME = /usr/local/google/home/gspencer/Android/Sdk
• Java binary at: /usr/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.10+7-Debian-1)
• All Android licenses accepted.
[✓] Chrome - develop for the web
• Chrome at google-chrome
[✓] Linux toolchain - develop for Linux desktop
• Debian clang version 16.0.6 (16)
• cmake version 3.27.7
• ninja version 1.11.1
• pkg-config version 1.8.1
[!] Android Studio (not installed)
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).
[✓] Connected device (2 available)
• Linux (desktop) • linux • linux-x64 • Debian GNU/Linux rodete 6.5.13-1rodete2-amd64
• Chrome (web) • chrome • web-javascript • Google Chrome 121.0.6167.160
[✓] Network resources
• All expected network resources are available.
! Doctor found issues in 1 category.