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[Web][Canvaskit] APNG does not play on Flutter 3.27+ #161723

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[Web][Canvaskit] APNG does not play on Flutter 3.27+#161723
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P2Important issues not at the top of the work lista: imagesLoading, displaying, rendering imagesc: regressionIt was better in the past than it is nowe: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Webengineflutter/engine related. See also e: labels.found in release: 3.27Found to occur in 3.27found in release: 3.28Found to occur in 3.28has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-webWeb applications specificallyteam-webOwned by Web platform teamtriaged-webTriaged by Web platform team
@HarukaOki

Description

@HarukaOki
HarukaOki
opened on Jan 16, 2025

Steps to reproduce

The animation does not play when using CachedNetworkImage to display APNG, as shown in the following sample code.

Expected results

APNG images play when displaying them with CachedNetworkImage.

Actual results

Cannot play APNG on Web, in Flutter 3.27.2.

As far as I have researched, it plays in these condition:

  • Using Image.network instead of CachedNetworkImage.
  • on platforms other than the web (e.g., MacOS).
  • build with --web-renderer html.
  • on a previous Flutter SDK version (3.24.5).

Code sample

Code sample 
...
CachedNetworkImage(
                  imageUrl: 'some_apng_url.png'
)
...

Screenshots or Video

Screenshots / Video demonstration

[Upload media here]

Logs

Logs 
[Paste your logs here]

Flutter Doctor output

Doctor output 
[✓] Flutter (Channel stable, 3.27.2, on macOS 15.1.1 24B91 darwin-arm64, locale ja-JP)
    • Flutter version 3.27.2 on channel stable at /Users/harukaoki/development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 68415ad1d9 (3 days ago), 2025-01-13 10:22:03 -0800
    • Engine revision e672b006cb
    • Dart version 3.6.1
    • DevTools version 2.40.2

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    • Android SDK at /Users/harukaoki/Library/Android/sdk
    • Platform android-35, build-tools 33.0.1
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11609105)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16C5032a
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.1)
    • 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 17.0.10+0-17.0.10b1087.21-11609105)

[✓] VS Code (version 1.96.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.102.0

[✓] Connected device (4 available)
    • iPhone (8) (mobile)             • 00008020-001124CE3CE9002E • ios            • iOS 18.1.1 22B91
    • macOS (desktop)                 • macos                     • darwin-arm64   • macOS 15.1.1 24B91 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad     • darwin         • macOS 15.1.1 24B91 darwin-arm64
    • Chrome (web)                    • chrome                    • web-javascript • Google Chrome 132.0.6834.83

[✓] Network resources
    • All expected network resources are available.

• No issues found!

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    P2Important issues not at the top of the work lista: imagesLoading, displaying, rendering imagesc: regressionIt was better in the past than it is nowe: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Webengineflutter/engine related. See also e: labels.found in release: 3.27Found to occur in 3.27found in release: 3.28Found to occur in 3.28has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-webWeb applications specificallyteam-webOwned by Web platform teamtriaged-webTriaged by Web platform team

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