Inverted colors for images with Gray color model

[pcomans]

Steps to Reproduce

Consider this example:

new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new Image.network(
                "https://storage.googleapis.com/flutter-test/greys_yf6ijb.jpg"),
            new Image.network(
                "https://storage.googleapis.com/flutter-test/greys.jpg"),
          ],
        ),

Both images are greyscale, but greys.jpg is encoded in YCbCr H2V2 and greys_yf6ijb.jpg is encoded in 8 bits grey.

As you can see in this screenshot, greys_yf6ijb.jpg shows up with inverted colors while greys.jpg does not.

Logs

Flutter Doctor

[✓] Flutter (on Mac OS X 10.12.6 16G1036, locale en-US, channel alpha-chq-candidate)
• Flutter version 0.0.21-pre.6 at /Users/philipp/carnivore/flutter
• Framework revision f985e8d (6 hours ago), 2018-02-01 11:28:28 -0800
• Engine revision 8f2d72b
• Tools Dart version 2.0.0-dev.16.0
• Engine Dart version 2.0.0-edge.7af4db0ea091dddca6b2da851e6dda8d7f9467e8

[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
• Android SDK at /Users/philipp/Library/Android/sdk
• Android NDK at /Users/philipp/Library/Android/sdk/ndk-bundle
• Platform android-27, build-tools 27.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08)

[✓] iOS toolchain - develop for iOS devices (Xcode 9.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 9.2, Build version 9C40b
• ios-deploy 1.9.2
• CocoaPods version 1.4.0.beta.2

[✓] Android Studio (version 3.0)
• Android Studio at /Applications/Android Studio.app/Contents
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08)

[✓] IntelliJ IDEA Ultimate Edition (version 2017.3.4)
• Flutter plugin version 21.2.3
• Dart plugin version 173.4548.30

[✓] Connected devices
• Android SDK built for x86 • emulator-5554 • android-x86 • Android 8.1.0 (API 27) (emulator)

[brianosman]

This was fixed in Skia, then rolled into flutter/engine by flutter/engine#4911. Once that version of the engine is rolled out, the bug should be fixed.

[zoechi]

Did flutter/engine#4911 fix this for you?

[no-response]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now. Please don't hesitate to comment on the bug if you have any more information for us; we will reopen it right away!
Thanks for your contribution.
cc @Hixie

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.