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flutter/examples/layers
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liyuqian c63dcf3bcd
Make shader warm-up async so it can handle image (#28687) 
## Description

This moves another 15-20ms from the animation jank of one of our important client to the startup latency. Unfortunately, this is probably not captured in our current benchmarks (presumably some other bottlenecks overshadow this shader compilation in the worst_frame benchmark). Considering that drawing images is such a common operation, maybe we should add one in the future to benchmark this.

We need this PR to land soon for our client because this changes the API to return Future.

## Related Issues

https://github.com/flutter/flutter/issues/813
2019-02-28 20:07:55 -08:00
..
android Revert "Upgrade the Gradle script to Android plugin version 3.3.0 (#26913)" (#27045) 2019-01-24 14:29:08 -08:00
ios Roll engine to 05fee4eeee0ff6b219b1fcc394371e5f6963cc46 (#26713) 2019-01-21 21:23:04 -08:00
lib Make examples/catalog instructions a bit less confusing (#24252) 2018-11-14 14:26:30 -08:00
raw Make shader warm-up async so it can handle image (#28687) 2019-02-28 20:07:55 -08:00
rendering sort_constructors_first (#22575) 2018-10-04 07:28:07 +02:00
services Prefer void to null (#22977) 2018-10-16 22:03:06 +02:00
test Reland "Shader warm up (#27660)" (#28537) 2019-02-27 09:33:08 -08:00
widgets add missing type parameter on methods (#22096) 2018-10-01 21:29:08 +02:00
pubspec.yaml Add capability to run build_runner tests for engine (#28684) 2019-02-28 20:06:14 -08:00
README.md Update the examples/ README and associated fixes. (#9090) 2017-04-05 11:28:33 -07:00

README.md

Examples of Flutter's layered architecture

This directory contains a number of self-contained examples that illustrate Flutter's layered architecture.

  • raw/ These examples show how to program against the lowest layer of the system. They manually receive input packets and construct composited scenes.

  • rendering/ These examples use Flutter's render tree to structure your app using a retained tree of visual objects. These objects coordinate to determine their size and position on screen and to handle events.

  • widgets/ These examples use Flutter's widgets to build more elaborate apps using a reactive framework.

  • services/ These examples use services available in Flutter to interact with the host platform.

To run each example, specify the demo file on the flutter run command line, for example:

flutter run raw/spinning_square.dart
flutter run rendering/spinning_square.dart
flutter run widgets/spinning_square.dart