Comments (5)
christophsj
commented on June 27, 2024
1
Hi,
I tried to reproduce your issue and I wasn't able to do so with your sample code, the images were the same size no matter what scale. However I did manage to reproduce it with the following example where the issue can easily be seen, maybe that helps :)
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
double _scale = .5;
void _changeScale() {
setState(() {
_scale = _scale == 0.5 ? 2 : .5;
});
}
static const url =
'https://upload.wikimedia.org/wikipedia/en/b/b7/Google1998.png';
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
body: SingleChildScrollView(
child: Column(
children: <Widget>[
Text(_scale.toString()),
Image.network(url, scale: _scale),
const SizedBox(
height: 100,
),
Transform.scale(scale: _scale, child: Image.network(url))
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _changeScale,
child: const Icon(Icons.edit),
),
),
);
}
}
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goderbauer
commented on June 27, 2024
1
This is working as intended and documented on other parts of the API:
The scale argument specifies the linear scale factor for drawing this image at its intended size and applies to both the width and the height. For example, if this is 2.0, it means that there are four image pixels for every one logical pixel, and the image's actual width and height (as given by the dart:ui.Image.width and dart:ui.Image.height properties) are double the height and width that should be used when painting the image (e.g. in the arguments given to Canvas.drawImage).
We should also include this note in the other Image constructors (and RawImage).
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darshankawar
commented on June 27, 2024
@mmcdon20
Thanks for the report. Can you provide runnable code sample (ex: main.dart) that we can directly copy paste to verify this further ?
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mmcdon20
commented on June 27, 2024
@darshankawar I have already provided runnable code samples. See the section titled "Code Sample". Each of those is a complete program.
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darshankawar
commented on June 27, 2024
Thanks for the code @christophsj That's what I was looking for, runnable code.
I do see the images being rendered as reported, so keeping the issue open and labeling for team's attention.
stable, master flutter doctor -v
[!] Flutter (Channel stable, 3.22.0, on macOS 12.2.1 21D62 darwin-x64, locale
en-GB)
• Flutter version 3.22.0 on channel stable at
/Users/dhs/documents/fluttersdk/flutter
! Warning: `flutter` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
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/Users/dhs/documents/fluttersdk/flutter. Consider adding
/Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
! Warning: `dart` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
of your path.
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 5dcb86f68f (5 days ago), 2024-05-09 07:39:20 -0500
• Engine revision f6344b75dc
• Dart version 3.4.0
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• If those were intentional, you can disregard the above warnings; however
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Download the latest version or update via the Mac App Store.
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ios • iOS 14.4.1 18D61
• iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729 •
ios • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
• macOS (desktop) • macos •
darwin-x64 • Mac OS X 10.15.4 19E2269 darwin-x64
• Chrome (web) • chrome •
web-javascript • Google Chrome 98.0.4758.80
[✓] HTTP Host Availability
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! Doctor found issues in 1 category.
[!] Flutter (Channel master, 3.22.0-35.0.pre.24, on macOS 12.2.1 21D62
darwin-x64, locale en-GB)
• Flutter version 3.22.0-35.0.pre.24 on channel master at
/Users/dhs/documents/fluttersdk/flutter
! Warning: `flutter` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
your current Flutter SDK checkout at
/Users/dhs/documents/fluttersdk/flutter. Consider adding
/Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
! Warning: `dart` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
of your path.
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 2b0d879ec7 (63 minutes ago), 2024-05-16 00:13:26 -0400
• Engine revision 942d7c35de
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• If those were intentional, you can disregard the above warnings; however
it is recommended to use "git" directly to perform update checks and
upgrades.
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /Users/dhs/Library/Android/sdk
✗ cmdline-tools component is missing
Run `path/to/sdkmanager --install "cmdline-tools;latest"`
See https://developer.android.com/studio/command-line for more details.
✗ Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/macos#android-setup for
more details.
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• Build 13C100
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• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.29.0
[✓] Connected device (3 available)
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• iOS 15.3.1 19D52
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darwin-x64 • macOS 12.2.1 21D62 darwin-x64
• Chrome (web) • chrome •
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[✓] Network resources
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! Doctor found issues in 1 category.
[!] Xcode - develop for iOS and macOS (Xcode 12.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
! Flutter recommends a minimum Xcode version of 13.
Download the latest version or update via the Mac App Store.
• CocoaPods version 1.11.2
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] VS Code (version 1.62.0)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.21.0
[✓] Connected device (5 available)
• SM G975F (mobile) • RZ8M802WY0X • android-arm64 • Android 11 (API 30)
• Darshan's iphone (mobile) • 21150b119064aecc249dfcfe05e259197461ce23 •
ios • iOS 14.4.1 18D61
• iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729 •
ios • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
• macOS (desktop) • macos •
darwin-x64 • Mac OS X 10.15.4 19E2269 darwin-x64
• Chrome (web) • chrome •
web-javascript • Google Chrome 98.0.4758.80
[✓] HTTP Host Availability
• All required HTTP hosts are available
! Doctor found issues in 1 category.
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