这是indexloc提供的服务，不要输入任何密码
Skip to content
This repository was archived by the owner on Feb 25, 2025. It is now read-only.
Permalink

Comparing changes

Choose two branches to see what’s changed or to start a new pull request. If you need to, you can also or learn more about diff comparisons.

Open a pull request

Create a new pull request by comparing changes across two branches. If you need to, you can also . Learn more about diff comparisons here.
base repository: flutter/engine
Failed to load repositories. Confirm that selected base ref is valid, then try again.
Loading
base: c5fc179cf0b3
Choose a base ref
...
head repository: flutter/engine
Failed to load repositories. Confirm that selected head ref is valid, then try again.
Loading
compare: 726a137e3f99
Choose a head ref
  • 1 commit
  • 8 files changed
  • 1 contributor

Commits on Dec 16, 2023

  1. Add FlutterMetalLayer as optional alternative to CAMetalLayer (#48226) 

    This PR implements `FlutterMetalLayer`, a drop-in (as far as Flutter is
concerned) replacement for `CAMetalLayer`. The biggest difference is
that `FlutterMetalLayer` can present frames from background thread
within a `CATransaction`.

`FlutterMetalLayer` is disabled by default. To opt-in, add the following
item to `Info.plist`:

```xml
        <key>FLTUseFlutterMetalLayer</key>
	<true/>
```

The performance seems quite good, consistent 120hz on iPhone 13 Pro.

Benefits
- presenting with transaction from background thread, which, down the
line, would allow for platform views without thread merging.
- fine control over how the surface is displayed - we can display single
surface on multiple `CALayers`, each showing different part, allowing
for performant implementation of unobstructed platform views.
 
Drawbacks
- this not being a metal layer makes working with metal instrument tools
more awkward
    @knopp
    knopp authored Dec 16, 2023
    Configuration menu
    Copy the full SHA
    726a137 View commit details
    Browse the repository at this point in the history
Loading