…engine#44522)

…132182)

flutter/engine@6839b88...8ec5751

2023-08-09 [email protected] [Impeller] Plumb Paint.enableDithering to backend (flutter/engine#44522)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC [email protected],[email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Closes flutter/flutter#131450 and
flutter/flutter#118073.

Example from flutter/flutter#118073:

```diff
import 'package:flutter/material.dart';

void main() {
+ Paint.enableDithering = true;
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @OverRide
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @OverRide
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @OverRide
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Container(
          width: double.infinity,
          decoration: const BoxDecoration(
              gradient: LinearGradient(
                  colors: <Color>[Color(0xffcccccc), Color(0xff333333)])),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              const Text(
                'You have pushed the button this many times:',
              ),
              Text(
                '$_counter',
                style: Theme.of(context).textTheme.headlineMedium,
              ),
            ],
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
```

## Before

<img width="2028" alt="Screenshot 2023-08-08 at 5 15 40 PM"
src="https://github.com/flutter/engine/assets/168174/c58106bb-f588-4019-8cf0-3dd801f0b118">

## After

<img width="2028" alt="Screenshot 2023-08-08 at 5 15 01 PM"
src="https://github.com/flutter/engine/assets/168174/33c4fec8-db52-47c2-b215-c1988ce82416">