picture.toImage is not working correctly on actual device after drawing image. #21618
Description
Steps to Reproduce
Simple code here
ui.PictureRecorder pictureRecorder = new ui.PictureRecorder();
ui.Canvas canvas = new ui.Canvas(pictureRecorder);
ui.Paint painter = new ui.Paint()
canvas.drawImageRect(SOME_IMAGE, Rect, Rect, painter);
ui.Picture pic = pictureRecorder.endRecording();
ui.Image img = pic.toImage(width, height);
ByteData byteData = await img.toByteData(format: ui.ImageByteFormat.png);
print(byteData.buffer.asUint8List()); // <- this print zeroes like, [...0,0,0,0,0,0,0,0,...]
It works fine on simulator but not on actual devices (I tested it on Nexus 5(Android), iPhone X, iPhone 6).
Can you guys please just take a look at it?
[√] Flutter (Channel dev, v0.7.3, on Microsoft Windows [Version 6.3.9600], locale ko-KR)
• Flutter version 0.7.3 at E:\flutter\flutter_windows_v0.5.1-beta\flutter
• Framework revision 3b309bda07 (12 days ago), 2018-08-28 12:39:24 -0700
• Engine revision af42b6dc95
• Dart version 2.1.0-dev.1.0.flutter-ccb16f7282
[!] Android toolchain - develop for Android devices (Android SDK 28.0.0)
• Android SDK at E:\android-sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.0
• ANDROID_HOME = E:\android-sdk
• Java binary at: E:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)
X Android license status unknown.
[√] Android Studio (version 3.1)
• Android Studio at E:\Program Files\Android\Android Studio
• Flutter plugin version 27.1.1
• Dart plugin version 173.4700
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)
[√] VS Code, 32-bit edition (version 1.25.1)
• VS Code at C:\Program Files (x86)\Microsoft VS Code
• Flutter extension version 2.18.0
[√] Connected devices (1 available)
• Nexus 5 • 04b23c9913ad87a7 • android-arm • Android 6.0 (API 23)