Canvas.drawImageRect draws incorrectly with BlendMode.screen with Impeller #148213
Description
Steps to reproduce
git clone https://github.com/blaugold/impeller_draw_image_screen_issuecd impeller_draw_image_screen_issueflutter run(on a real iOS device)- Image is drawn incorrectly with
BlendMode.screen - In
main.dartuseBlendMode.srcOverto verify what is the expected result
Expected results
Actual results
Code sample
Code sample
import 'dart:ui' as ui;
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
final imageData = await rootBundle.load('asset/flash.webp');
final image = await decodeImageFromList(Uint8List.sublistView(imageData));
runApp(
Builder(
builder: (context) {
return Center(
child: CustomPaint(
painter: _Painter(image),
size: const Size(200, 200),
),
);
},
),
);
}
class _Painter extends CustomPainter {
_Painter(this.image);
final ui.Image image;
@override
bool shouldRepaint(CustomPainter oldDelegate) => true;
@override
void paint(Canvas canvas, Size size) {
canvas.drawImageRect(
image,
Rect.fromLTWH(0, 0, image.width.toDouble(), image.height.toDouble()),
Offset.zero & size / 4,
// Works as expected
// Paint()..blendMode = BlendMode.srcOver,
// Nothing is drawn or with other sizes some
Paint()..blendMode = BlendMode.screen,
);
}
}
Screenshots or Video
Screenshots / Video demonstration
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Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
flutter doctor -v
[✓] Flutter (Channel master, 3.22.0-28.0.pre.11, on macOS 14.4.1 23E224 darwin-arm64, locale en-US)
• Flutter version 3.22.0-28.0.pre.11 on channel master at /Users/terwesten/fvm/versions/master
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision b7a9e60850 (5 days ago), 2024-05-08 13:28:00 -0700
• Engine revision 9cb60de37b
• Dart version 3.5.0 (build 3.5.0-138.0.dev)
• DevTools version 2.36.0-dev.5
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
• Android SDK at /Users/terwesten/Library/Android/sdk
• Platform android-34, build-tools 34.0.0
• ANDROID_HOME = /Users/terwesten/Library/Android/sdk
• Java binary at: /Users/terwesten/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 17.0.10+0-17.0.10b1087.21-11572160)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 15E204a
• CocoaPods version 1.15.0
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2023.3)
• Android Studio at /Users/terwesten/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 17.0.10+0-17.0.10b1087.21-11572160)
[✓] IntelliJ IDEA Ultimate Edition (version 2024.1.1)
• IntelliJ at /Users/terwesten/Applications/IntelliJ IDEA Ultimate.app
• 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
[✓] IntelliJ IDEA Community Edition (version 2024.1.1)
• IntelliJ at /Users/terwesten/Applications/IntelliJ IDEA Community Edition.app
• Flutter plugin version 79.0.3
• Dart plugin version 241.15989.9
[✓] VS Code (version 1.89.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.88.0
[✓] Connected device (5 available)
• iPhone von Gabriel (mobile) • 00008130-001C71EC36B8001C • ios • iOS 17.4.1 21E236
• iPhone 15 Pro (mobile) • 0AB7761A-11F8-46CC-97DB-4A0DB33FCE07 • ios • com.apple.CoreSimulator.SimRuntime.iOS-17-2 (simulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 14.4.1 23E224 darwin-arm64
• Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin • macOS 14.4.1 23E224 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 124.0.6367.202
[✓] Network resources
• All expected network resources are available.
• No issues found!