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[web] Share core <code>dart:ui</code> primitives between CanvasKit and Skwasm

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

e: web_skwasmSkwasm rendering backend for webSkwasm rendering backend for web

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#175630 In flutter/flutter;

· harryterkelsen opened on Sep 18, 2025

[web] Unify garbage collection between CanvasKit and Skwasm

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

e: web_skwasmSkwasm rendering backend for webSkwasm rendering backend for web

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#175628 In flutter/flutter;

· harryterkelsen opened on Sep 18, 2025

[web] Unify Surface class to share Rasterizers

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

e: web_skwasmSkwasm rendering backend for webSkwasm rendering backend for web

P2Important issues not at the top of the work listImportant issues not at the top of the work list

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#175626 In flutter/flutter;

· harryterkelsen opened on Sep 18, 2025

[meta] Remaining work to unify CanvasKit and Skwasm backends

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

e: web_skwasmSkwasm rendering backend for webSkwasm rendering backend for web

team-webOwned by Web platform teamOwned by Web platform team

Status: Open.

Feature

#175624 In flutter/flutter;

· harryterkelsen opened on Sep 18, 2025

[Web][CanvasKit] Flutter not rendering images when <code>canvasKitForceCpuOnly</code> option is on

c: renderingUI glitches reported at the engine/skia or impeller rendering levelUI glitches reported at the engine/skia or impeller rendering level

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

found in release: 3.35Found to occur in 3.35Found to occur in 3.35

found in release: 3.37Found to occur in 3.37Found to occur in 3.37

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

Status: Open.

#175423 In flutter/flutter;

· dutsky opened on Sep 16, 2025

CanvasKit's <code>instantiateImageCodecFromUrl</code> incorrectly loads animated images

a: imagesLoading, displaying, rendering imagesLoading, displaying, rendering images

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#166803 In flutter/flutter;

· eyebrowsoffire opened on Apr 9, 2025

[web] Switch back to <code>transferToImageBitmap</code> once Chrome bugs are resolved

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

e: webgl

P2Important issues not at the top of the work listImportant issues not at the top of the work list

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#163775 In flutter/flutter;

· harryterkelsen opened on Feb 20, 2025

Occasional bursts of "Null check operator used on a null value" on the web

⏳Bot is counting down the days until it unassigns the issueBot is counting down the days until it unassigns the issue

a: productionIssues experienced in live production appsIssues experienced in live production apps

c: crashStack traces logged to the consoleStack traces logged to the console

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

needs repro infoAutomated crash report whose cause isn't yet knownAutomated crash report whose cause isn't yet known

P1High-priority issues at the top of the work listHigh-priority issues at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#162868 In flutter/flutter;

· dmitry-fbm opened on Feb 7, 2025

CanvasKit has performance issues with platform views

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

P1High-priority issues at the top of the work listHigh-priority issues at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#162618 In flutter/flutter;

· harryterkelsen opened on Feb 3, 2025

[web] [fonts] When loading a large number of fonts in series in a web application the application crash

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

found in release: 3.27Found to occur in 3.27Found to occur in 3.27

found in release: 3.29Found to occur in 3.29Found to occur in 3.29

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#162570 In flutter/flutter;

· mahmoudbahaa opened on Feb 2, 2025

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

a: imagesLoading, displaying, rendering imagesLoading, displaying, rendering images

c: regressionIt was better in the past than it is nowIt was better in the past than it is now

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

found in release: 3.27Found to occur in 3.27Found to occur in 3.27

found in release: 3.28Found to occur in 3.28Found to occur in 3.28

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#161723 In flutter/flutter;

· HarukaOki opened on Jan 16, 2025

Severe VideoPlayer rendering issue while scrolling in Safari browser

browser: safari-macosonly manifests in Safari on macOSonly manifests in Safari on macOS

c: renderingUI glitches reported at the engine/skia or impeller rendering levelUI glitches reported at the engine/skia or impeller rendering level

e: web_canvaskitCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for WebCanvasKit (a.k.a. Skia-on-WebGL) rendering backend for Web

e: web_skwasmSkwasm rendering backend for webSkwasm rendering backend for web

found in release: 3.27Found to occur in 3.27Found to occur in 3.27

found in release: 3.28Found to occur in 3.28Found to occur in 3.28

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

P2Important issues not at the top of the work listImportant issues not at the top of the work list

p: video_playerThe Video Player pluginThe Video Player plugin

packageflutter/packages repository. See also p: labels.flutter/packages repository. See also p: labels.

platform-webWeb applications specificallyWeb applications specifically

team-webOwned by Web platform teamOwned by Web platform team

triaged-webTriaged by Web platform teamTriaged by Web platform team

Status: Open.

#160743 In flutter/flutter;

· Ortes opened on Dec 22, 2024