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Summary This PR improves the API documentation for ImageFilter.shader and isShaderFilterSupported by making the Impeller requirement more explicit and visible. What was changed Added an “Important” notice to clearly state that these APIs are only supported with Impeller. Updated the doc comments to front-load this detail instead of placing it later in the text. Added cross-reference notes explaining how isShaderFilterSupported relates to Impeller. Why this change is helpful Developers frequently run into confusion when using shader-based filters without realizing they require Impeller. This change makes the requirement obvious and easier to discover. Issue reference Fixes #178767
Flutter Engine
The Flutter Engine is a portable runtime for hosting Flutter applications. It implements Flutter's core libraries, including animation and graphics, file and network I/O, accessibility support, plugin architecture, and a Dart runtime and compile toolchain. Most developers will interact with Flutter via the Flutter Framework, which provides a modern, reactive framework, and a rich set of platform, layout and foundation widgets.
More tooling is available to make development experiences easier:
| Target | Tool |
|---|---|
| Web | felt |
| Mobile or Desktop | et |
To learn about running tests, see testing the engine.