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Md. Murad Hossin b1a28bc065
web_ui: avoid crash for showPerformanceOverlay; log 'not supported' once (#173518) 
Fixes flutter/flutter#172405

On Flutter Web, calling `MaterialApp(showPerformanceOverlay: true)`
reaches
`SceneBuilder.addPerformanceOverlay`, which previously threw
`UnimplementedError`
and crashed apps. This change makes the method a no-op on Web and logs a
one-time
warning:

  "showPerformanceOverlay is not supported on Flutter Web. Use DevTools
   Performance (Timeline) instead."

Rationale: Avoid crashes and guide developers to the supported tooling
on Web.

Testing:
- Relied on CI for web_ui builds and tests.
- (Manual reproduction before fix) Enabling `showPerformanceOverlay` on
Web produced
  UnimplementedError from `canvaskit/layer_scene_builder.dart`.

---------

Co-authored-by: Mouad Debbar <mdebbar@google.com>
2025-09-25 14:18:28 +00:00
..
scripts
…
src
web_ui: avoid crash for showPerformanceOverlay; log 'not supported' once (#173518)
2025-09-25 14:18:28 +00:00
README.md
chore: move engine docs out of engine/ and into docs/ (#175195)
2025-09-16 18:19:50 +00:00

README.md

Flutter Engine

Setting up the Engine development environment

See here

gclient bootstrap

Flutter engine uses gclient to manage dependencies.

If you've already cloned the flutter repository:

  1. Copy one of the engine/scripts/*.gclient to the root folder as .gclient:
    1. Googlers: copy rbe.gclient to enable faster builds with RBE
    2. Everyone else: copy standard.gclient
  2. run gclient sync from the root folder