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[Impeller] wire up bdf and blend detection in experimental canvas. #53151

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Jun 4, 2024

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Use the flags in #53104 + context capabilities to determine if we need to begin the first pass as an offscreen.

Part of flutter/flutter#142054

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@jonahwilliams jonahwilliams changed the title wire up bdf and blend detection. [Impeller] wire up bdf and blend detection in exp. canvas May 31, 2024
@jonahwilliams jonahwilliams requested a review from flar June 4, 2024 16:00
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LGTM! Note suggestion about blend constants...

const ContentContext& renderer,
flutter::DlBlendMode max_root_blend_mode) {
return !renderer.GetDeviceCapabilities().SupportsFramebufferFetch() &&
max_root_blend_mode >= flutter::DlBlendMode::kScreen;
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Is there a kLastSomethingBlendMode constant in Impeller's blend mode? If this method took an impeller blend mode it could use that for this test. DlBlendMode currently has a different set of "cutoff constants", though.

Just thinking forward until someone fixes the "is screen an advanced blend mode" issue.

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Oh right, good idea!

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Done

@jonahwilliams jonahwilliams changed the title [Impeller] wire up bdf and blend detection in exp. canvas [Impeller] wire up bdf and blend detection in experimental canvas. Jun 4, 2024
@jonahwilliams jonahwilliams added the autosubmit Merge PR when tree becomes green via auto submit App label Jun 4, 2024
@auto-submit auto-submit bot merged commit 7a55478 into flutter:main Jun 4, 2024
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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 4, 2024
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Jun 4, 2024
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flutter/engine@3dd4015...e884690

2024-06-04 [email protected] [Impeller] Clarify rendering backend fallback behavior on Android. (flutter/engine#53202)
2024-06-04 [email protected] [Impeller] wire up bdf and blend detection in experimental canvas. (flutter/engine#53151)

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