[Impeller] drawing path with image shader is not correct #127183
Description
Is there an existing issue for this?
- I have searched the existing issues
- I have read the guide to filing a bug
Steps to reproduce
run the sample code on master channel
Expected results
See part of an owl in a pentagon
Actual results
Pentagons are approximately pure colors
Code sample
Code sample
import 'dart:async';
import 'dart:math';
import 'dart:ui' as ui;
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: FutureBuilder<ui.Image>(
future: _loadImage('https://flutter.github.io/assets-for-api-docs/assets/widgets/owl.jpg'),
builder: (BuildContext context, AsyncSnapshot<ui.Image> snapshot) {
if (snapshot.hasData) {
return CustomPaint(
painter: StarPainter(snapshot.data!),
child: Container(),
);
} else {
return Center(child: CircularProgressIndicator());
}
},
),
),
);
}
Future<ui.Image> _loadImage(String imageUrl) async {
var completer = Completer<ImageInfo>();
var img = NetworkImage(imageUrl);
img.resolve(const ImageConfiguration()).addListener(ImageStreamListener((info, _) {
completer.complete(info);
}));
ImageInfo imageInfo = await completer.future;
return imageInfo.image;
}
}
class StarPainter extends CustomPainter {
final ui.Image image;
StarPainter(this.image);
@override
void paint(Canvas canvas, Size size) {
final paint = Paint();
paint.shader = ImageShader(image, TileMode.repeated, TileMode.repeated, Matrix4.identity().storage);
final path = Path();
final radius = size.width / 2;
final angle = 2 * 3.1416 / 5;
Offset center = Offset(size.width / 2, size.height / 2);
for (int i = 0; i <= 5; i++) {
final currentAngle = angle * i - 3.1416 / 2;
final pointX = center.dx + radius * cos(currentAngle);
final pointY = center.dy + radius * sin(currentAngle);
if (i == 0) {
path.moveTo(pointX, pointY);
} else {
path.lineTo(pointX, pointY);
}
}
path.close();
canvas.drawPath(path, paint);
}
@override
bool shouldRepaint(covariant CustomPainter oldDelegate) {
return false;
}
}Screenshots or Video
Screenshots / Video demonstration
expect
actual
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
[✓] Flutter (Channel master, 3.11.0-6.0.pre.157, on macOS 13.0.1 22A400 darwin-arm64 (Rosetta), locale zh-Hans-CN)
• Flutter version 3.11.0-6.0.pre.157 on channel master at /Users/z/Develop/upstream/flutter
• Upstream repository [email protected]:flutter/flutter.git
• Framework revision 2f299f2aa7 (2 hours ago), 2023-05-19 04:58:38 -0400
• Engine revision 5a57ff52f0
• Dart version 3.1.0 (build 3.1.0-126.0.dev)
• DevTools version 2.23.1
• Pub download mirror https://dart-pub.byted.org
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK at /Users/z/Library/Android/sdk
• Platform android-33, build-tools 33.0.0
• ANDROID_HOME = /Users/z/Library/Android/sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14B47b
• CocoaPods version 1.11.3
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2021.3)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
[✓] VS Code (version 1.78.0)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.64.0
[✓] Connected device (3 available)
• iPhone SE (2nd generation) (mobile) • 00008030-0018042E2E46802E • ios • iOS 15.0 19A346
• macOS (desktop) • macos • darwin-arm64 • macOS 13.0.1 22A400 darwin-arm64 (Rosetta)
• Chrome (web) • chrome • web-javascript • Google Chrome 113.0.5672.126
[✓] Network resources
• All expected network resources are available.
• No issues found!