Video rendering broken for OpenGLES Impeller Backend #165976
Description
Steps to reproduce
- Launch Livekit Example App on a phone which does not support Vulkan (or force OpenGLES in AndroidManifest)
- connect to a room with other participants
- observe bad video quality (depends on sent resolution of other participants, it's better visible in low resolutios)
Expected results
I expect the video rendering to look the same, independent on which renderer is used.
Actual results
When OpenGLES is used as Impeller Backend, the video looks like it has lower resolution. On actual video data the effects are much worse, check this issue for real world data (I'm not 100% sure it's the same underlying issue, but the symptoms look exactly the same)
On the "test image" samples below it looks like some kind of antialiasing is missing on OpenGLES
Code sample
https://github.com/livekit/client-sdk-flutter/tree/main/example
Screenshots or Video
Screenshots / Video demonstration
Skia
Skia Detail
Vulkan
Vulkan Detail:
OpenGLES
OpenGLES Detail
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.29.2, on Arch Linux 6.13.8-arch1-1, locale en_US.UTF-8) [179ms]
• Flutter version 3.29.2 on channel stable at /home/tobias/src/3rdparty/flutter
• Upstream repository https://github.com/flutter/flutter
• Framework revision c236373904 (13 days ago), 2025-03-13 16:17:06 -0400
• Engine revision 18b71d647a
• Dart version 3.7.2
• DevTools version 2.42.3
[✓] Android toolchain - develop for Android devices (Android SDK version 35) [2.7s]
• Android SDK at /opt/android-sdk/
• Platform android-36, build-tools 35
• ANDROID_HOME = /opt/android-sdk/
• Java binary at: /opt/android-studio/jbr/bin/java
This is the JDK bundled with the latest Android Studio installation on this machine.
To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment (build 21.0.5+-12932927-b750.29)
• All Android licenses accepted.
[✓] Chrome - develop for the web [95ms]
• Chrome at google-chrome
[✓] Linux toolchain - develop for Linux desktop [204ms]
• clang version 19.1.7
• cmake version 3.31.6
• ninja version 1.12.1
• pkg-config version 2.4.3
[✓] Android Studio (version 2024.3) [94ms]
• Android Studio at /opt/android-studio
• Flutter plugin version 83.0.4
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 21.0.5+-12932927-b750.29)
[✓] Connected device (3 available) [227ms]
• SM A145R (mobile) • R8YW707S3KF • android-arm64 • Android 14 (API 34)
• Linux (desktop) • linux • linux-x64 • Arch Linux 6.13.8-arch1-1
• Chrome (web) • chrome • web-javascript • Mozilla Firefox 136.0.2
[✓] Network resources [795ms]
• All expected network resources are available.
• No issues found!