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[BUG] SKWasm Blur doesn't work #178028

Description

@AlexDochioiu

Steps to reproduce

Reproducible example here:
https://github.com/AlexDochioiu/flutter-wasm-chrome-extension-bug/tree/fonts-issue

Look at README for a bit more info.

Expected results

Blurs work well

Actual results

Blurred items don't render at all (tried clamp and decal)

Code sample

Code sample

https://github.com/AlexDochioiu/flutter-wasm-chrome-extension-bug/tree/fonts-issue

Screenshots or Video

Screenshots / Video demonstration

Running on Android:
https://github.com/user-attachments/assets/4ad4f40e-d95a-4351-98a1-1b705f488681

Running on web without wasm:

web.no.wasm.mov

Running on web with wasm:

web.wasm.mov

Logs

Logs
flutter doctor -v                
[✓] Flutter (Channel stable, 3.35.7, on macOS 26.0.1 25A362 darwin-arm64, locale en-US) [2.8s]
    • Flutter version 3.35.7 on channel stable at /Users/alexandrudochioiu/.asdf/installs/flutter/3.35.7-stable
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision adc9010625 (2 weeks ago), 2025-10-21 14:16:03 -0400
    • Engine revision 035316565a
    • Dart version 3.9.2
    • DevTools version 2.48.0
    • Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-lldb-debugging

[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [4.3s]
    • Android SDK at /Users/alexandrudochioiu/Library/Android/sdk
    • Emulator version 36.1.9.0 (build_id 13823996) (CL:N/A)
    • Platform android-36, build-tools 36.0.0
    • ANDROID_HOME = /Users/alexandrudochioiu/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/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 21.0.7+-13880790-b1038.58)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 26.0.1) [3.6s]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 17A400
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [10ms]
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2025.1) [10ms]
    • 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 21.0.7+-13880790-b1038.58)

[✓] Connected device (3 available) [6.1s]
    • Alexandru’s iPhone 15 (wireless) (mobile) • 00008120-001250E12250A01E • ios            • iOS 26.0.1 23A355
    • macOS (desktop)                           • macos                     • darwin-arm64   • macOS 26.0.1 25A362 darwin-arm64
    • Chrome (web)                              • chrome                    • web-javascript • Google Chrome 142.0.7444.60
    ! Error: Browsing on the local area network for iPhone. Ensure the device is unlocked and attached with a cable or associated with the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)

[✓] Network resources [416ms]
    • All expected network resources are available.

• No issues found!

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Metadata

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Labels

P1High-priority issues at the top of the work liste: wasmIssues related to the wasm build of Flutter Web.e: web_skwasmSkwasm rendering backend for webengineflutter/engine related. See also e: labels.platform-webWeb applications specificallyr: fixedIssue is closed as already fixed in a newer versionteam-webOwned by Web platform teamtriaged-webTriaged by Web platform team

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