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The destination buffer format may not exactly match the source format. In particular, the alpha type of the source may need to be converted to the alpha type of the destination.

Fixes flutter/flutter#128102

@jason-simmons jason-simmons requested a review from bdero June 5, 2023 23:10
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It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat (don't just cc him here, he won't see it! He's on Discord!).

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

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bdero commented Jun 6, 2023

LGTM!

…mode

The destination buffer format may not exactly match the source format.
In particular, the alpha type of the source may need to be converted
to the alpha type of the destination.

Fixes flutter/flutter#128102
@jason-simmons jason-simmons added the autosubmit Merge PR when tree becomes green via auto submit App label Jun 6, 2023
@auto-submit auto-submit bot merged commit 59d5444 into flutter:main Jun 7, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 7, 2023
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Jun 7, 2023
…128376)

flutter/engine@6f9df0f...59d5444

2023-06-07 jason-simmons@users.noreply.github.com Convert pixel formats for animated PNG frames using the source blend mode (flutter/engine#42581)
2023-06-06 skia-flutter-autoroll@skia.org Roll ANGLE from e21ecd1b59f7 to 16841d6256da (24 revisions) (flutter/engine#42601)
2023-06-06 skia-flutter-autoroll@skia.org Roll Skia from 4065e92bf577 to cef18d10b363 (18 revisions) (flutter/engine#42600)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jacksongardner@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Apng(Animated Png) with alpha channel won't get blended to background properly
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