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@nichtverstehen
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Otherwise the callbacks may be called after FlutterNativeView is destroyed and is null.

Also defensively check for whether the texture is already released in the callback because the callback may be called from another thread by a stale reference (see the comment).

This closes flutter/flutter#20951.

@nichtverstehen nichtverstehen force-pushed the master branch 6 times, most recently from 4e9866e to 80dd84e Compare August 24, 2018 15:28
@Override
public void onFrameAvailable(SurfaceTexture texture) {
// NB: This callback may be called on an arbitrary thread.
if (SurfaceTextureRegistryEntry.this.surfaceTexture.isReleased()) { // isReleased is synchronized in JNI code.
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Android BUILD failed.

Unfortunately, this API only seems to be available in Android 26 and up. You will need to do a SDK version check here too :-/

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@nichtverstehen nichtverstehen Aug 24, 2018

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Right. I also realized that it's still racy: if all of the deinitialization happens between checking isReleased() and accessing mNativeView we'd get null anyway.

We really should pass a Handler and execute the callback on the main thread. Is nativeMarkTextureFrameAvailable actually meant to be thread-safe?

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Actually the callback is actually run on the main thread:
// Although we claim the thread is arbitrary, earlier implementation would
// prefer to send the callback on the creating looper or the main looper
// so we preserve this behavior here.
http://cs/aosp-master/frameworks/base/graphics/java/android/graphics/SurfaceTexture.java?l=203

And Flutter relies on this:
http://cs/github/flutter/engine/shell/common/shell.cc?l=607

So I passed a Handler for the current thread explicitly here and now we can safely check SurfaceTextureRegistryEntry.released.

PTAL.

nativeMarkTextureFrameAvailable(mNativeView.get(), SurfaceTextureRegistryEntry.this.id);
}
});
}, new Handler());
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Why the new Handler()?

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Added a comment. See also the discussion with Mehmet in the comments above.

// Even though we make sure to unregister the callback before releasing,
// SurfaceTexture has a data race when accessing the callback, so the callback may
// still be called by a stale reference after released==true and mNativeView==null.
// See b/113099095.
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Can we avoid referencing buganizer from the framework?

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If necessary, please copy the buganizer bug over to GitHub and then reference that here instead.

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Removed the bug reference. (FWIW, the buganizer bug is against Android base system).

@matthew-carroll
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The changes look fine to me. I also added Chinmay and Jason for a sanity check. I'm not familiar enough with FlutterView and FlutterNativeView yet to be sure there aren't any implications to this.

Otherwise the callbacks may be called after FlutterNativeView is destroyed and is null.

Also defensively check for whether the texture is already released in the callback because the callback may be called from another thread by a stale reference (see the comment).

This closes flutter/flutter#20951.
@nichtverstehen
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Folks, what can we do to get this merged?

@matthew-carroll
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@mehmetf Do one of us need to merge this in?

@mehmetf mehmetf merged commit b0b8daa into flutter:master Sep 4, 2018
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...5063a8a

git log de4c7a5..5063a8a --no-merges --oneline
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...6d0fbc7

git log de4c7a5..6d0fbc7 --no-merges --oneline
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...b22badf

git log de4c7a5..b22badf --no-merges --oneline
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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If the roll is causing failures, please contact the current sheriff, who should
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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...3a7d0b5

git log de4c7a5..3a7d0b5 --no-merges --oneline
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...0981731

git log de4c7a5..0981731 --no-merges --oneline
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...e6d9b34

git log de4c7a5..e6d9b34 --no-merges --oneline
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 5, 2018
flutter/engine@de4c7a5...a0f30b3

git log de4c7a5..a0f30b3 --no-merges --oneline
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...f6ad3e0

git log de4c7a5..f6ad3e0 --no-merges --oneline
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...108e0a6

git log de4c7a5..108e0a6 --no-merges --oneline
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...572753f

git log de4c7a5..572753f --no-merges --oneline
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...ade0f22

git log de4c7a5..ade0f22 --no-merges --oneline
ade0f22 Remove unused file picture_serializer. (flutter/engine#6179)
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...1768bed

git log de4c7a5..1768bed --no-merges --oneline
1768bed Roll src/third_party/skia ffbcc3fadfa1..71f8475a0dba (3 commits) (flutter/engine#6181)
ade0f22 Remove unused file picture_serializer. (flutter/engine#6179)
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...897178c

git log de4c7a5..897178c --no-merges --oneline
897178c Roll src/third_party/skia 71f8475a0dba..33d3d31a7e28 (6 commits) (flutter/engine#6182)
1768bed Roll src/third_party/skia ffbcc3fadfa1..71f8475a0dba (3 commits) (flutter/engine#6181)
ade0f22 Remove unused file picture_serializer. (flutter/engine#6179)
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...5f61056

git log de4c7a5..5f61056 --no-merges --oneline
5f61056 Revert "Dart SDK roll for 2018/09/04 (flutter#6161)" (flutter/engine#6183)
897178c Roll src/third_party/skia 71f8475a0dba..33d3d31a7e28 (6 commits) (flutter/engine#6182)
1768bed Roll src/third_party/skia ffbcc3fadfa1..71f8475a0dba (3 commits) (flutter/engine#6181)
ade0f22 Remove unused file picture_serializer. (flutter/engine#6179)
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
6d0fbc7 Roll src/third_party/skia 9478f7a38e6c..d0f0cb8ffc5e (1 commits) (flutter/engine#6167)
5063a8a Roll src/third_party/skia 72a02112a99f..9478f7a38e6c (1 commits) (flutter/engine#6166)
19a3bc8 Roll src/third_party/skia 85f4e40c5481..72a02112a99f (1 commits) (flutter/engine#6165)
9643a50 Roll src/third_party/skia fddc6fa394cb..85f4e40c5481 (1 commits) (flutter/engine#6164)
6ad3183 Fix windows build. (flutter/engine#6162)
30af2f2 Roll src/third_party/skia e486bbaae296..fddc6fa394cb (2 commits) (flutter/engine#6159)
b32ceaf Add some more logs for diagnosing screenshot failures (flutter/engine#6156)
c173655 Roll src/third_party/skia b84576af0a43..e486bbaae296 (9 commits) (flutter/engine#6155)
aaf98fb Use double multiplication by a scale instead of 3 divides for speed. (flutter/engine#6154)
593ed59 Revert "Use Skia normalize again after Skia precision fix. (flutter#6121)" (flutter/engine#6122)
137389a Roll src/third_party/skia a45e1a71f548..b84576af0a43 (16 commits) (flutter/engine#6153)
f89a386 Roll src/third_party/skia cff3fd834ca8..a45e1a71f548 (1 commits) (flutter/engine#6152)
b0b8daa Unregister onFrameAvailable callbacks when a TextureEntry is released. (flutter/engine#6079)
2dc8271 Roll src/third_party/skia 24e58341fbcd..cff3fd834ca8 (1 commits) (flutter/engine#6151)
eea3a21 Roll src/third_party/skia bf67741140fd..24e58341fbcd (2 commits) (flutter/engine#6148)
bdcbe80 Roll src/third_party/skia 88119de2b849..bf67741140fd (1 commits) (flutter/engine#6147)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.
liyuqian pushed a commit to flutter/flutter that referenced this pull request Sep 6, 2018
flutter/engine@de4c7a5...5f61056

git log de4c7a5..5f61056 --no-merges --oneline
5f61056 Revert "Dart SDK roll for 2018/09/04 (#6161)" (flutter/engine#6183)
897178c Roll src/third_party/skia 71f8475a0dba..33d3d31a7e28 (6 commits) (flutter/engine#6182)
1768bed Roll src/third_party/skia ffbcc3fadfa1..71f8475a0dba (3 commits) (flutter/engine#6181)
ade0f22 Remove unused file picture_serializer. (flutter/engine#6179)
572753f Roll src/third_party/skia 343553a1fe9e..ffbcc3fadfa1 (6 commits) (flutter/engine#6178)
108e0a6 Add transparency helpers to FlutterView.java (flutter/engine#6172)
f6ad3e0 Roll Tonic (flutter/engine#6177)
a0f30b3 Roll src/third_party/skia 9d1c88d9912d..343553a1fe9e (16 commits) (flutter/engine#6175)
e6d9b34 Remove the old location of the ICU data asset (flutter/engine#6170)
9f0ad8b Fixes negative end selection offset. (flutter/engine#6171)
0981731 Enable transparent FlutterViews (flutter/engine#6163)
3a7d0b5 Roll buildroot to 7aadfaf (flutter/engine#6169)
564d214 Roll src/third_party/skia d0f0cb8ffc5e..9d1c88d9912d (12 commits) (flutter/engine#6168)
6af60d7 Remove obsolete discovery mechanism from FlutterView (flutter/engine#6157)
b22badf Dart SDK roll for 2018/09/04 (flutter/engine#6161)
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amirh pushed a commit to amirh/engine that referenced this pull request Sep 21, 2018
flutter#6079)

Otherwise the callbacks may be called after FlutterNativeView is destroyed and is null.

Also defensively check for whether the texture is already released in the callback because the callback may be called from another thread by a stale reference (see the comment).

This closes flutter/flutter#20951.
amirh pushed a commit to amirh/engine that referenced this pull request Sep 21, 2018
flutter#6079)

Otherwise the callbacks may be called after FlutterNativeView is destroyed and is null.

Also defensively check for whether the texture is already released in the callback because the callback may be called from another thread by a stale reference (see the comment).

This closes flutter/flutter#20951.
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FlutterView should clear surface texture listeners before releasing it

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