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[Impeller] Unconditionally dither in gradient shader fragments. #46746

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merged 5 commits into from
Oct 24, 2023

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matanlurey
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Partial work towards flutter/flutter#112498.

Won't land this until #46745 is merged, so expect some redness until then.

@matanlurey matanlurey marked this pull request as ready for review October 11, 2023 01:29
@matanlurey matanlurey changed the title Unconditionally dither in gradient shader fragments. [Impeller] Unconditionally dither in gradient shader fragments. Oct 11, 2023
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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 or stuartmorgan on the #hackers channel in Chat (don't just cc them here, they won't see it! Use 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?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

@matanlurey matanlurey self-assigned this Oct 11, 2023
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@chinmaygarde chinmaygarde left a comment

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The linked related patch has landed. Let's go!

@matanlurey matanlurey added the autosubmit Merge PR when tree becomes green via auto submit App label Oct 24, 2023
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@jonahwilliams jonahwilliams left a comment

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LGTM

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@jonahwilliams jonahwilliams left a comment

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LGTM

@matanlurey matanlurey merged commit fb15e04 into flutter:main Oct 24, 2023
27 of 28 checks passed
@matanlurey matanlurey deleted the engine-fragmentAlwaysDithers branch October 24, 2023 23:23
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Oct 25, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Oct 25, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Oct 25, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Oct 25, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Oct 26, 2023
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Oct 26, 2023
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Oct 26, 2023
…137310)

Roll Flutter Engine from 6e09ee14e244 to 6428ed576841 (38 revisions)

flutter/engine@6e09ee1...6428ed5

2023-10-26 [email protected] Revert Dart SDK to 360370ff93b053253343832432f8329a11372ffc (flutter/engine#47326)
2023-10-25 [email protected] Roll Skia from fb979d0ce053 to a5da4435bb5c (1 revision) (flutter/engine#47325)
2023-10-25 [email protected] [Impeller] Cache location in metadata. (flutter/engine#46640)
2023-10-25 [email protected] Roll Skia from 8492914821fa to fb979d0ce053 (1 revision) (flutter/engine#47324)
2023-10-25 737941 [email protected] [Windows] Introduce FlutterWindowsViewController (flutter/engine#47242)
2023-10-25 [email protected] Roll Skia from 773abacc1581 to 8492914821fa (2 revisions) (flutter/engine#47322)
2023-10-25 [email protected] Roll Dart SDK from 73fa7b3e048a to 7745c140d1fe (1 revision) (flutter/engine#47321)
2023-10-25 [email protected] Cleanup Dart package dependencies a bit (flutter/engine#47306)
2023-10-25 [email protected] Roll Skia from d511fa1f1533 to 773abacc1581 (1 revision) (flutter/engine#47312)
2023-10-25 [email protected] Roll Fuchsia Mac SDK from SOv1RJmbyDByvud8D... to kNdyn03p28H7VeMcd... (flutter/engine#47313)
2023-10-25 [email protected] Roll Fuchsia Linux SDK from vX5n99OIWgLX6bObI... to zTq0jH2Y3Fl0uUUSa... (flutter/engine#47309)
2023-10-25 [email protected] Roll Skia from 0748053419cd to d511fa1f1533 (1 revision) (flutter/engine#47308)
2023-10-25 30870216 [email protected] Missed linter argument comment violations (flutter/engine#47310)
2023-10-25 [email protected] [Impeller] Remove use of FML_DISALLOW_<FOO> macros in Impeller. (flutter/engine#47307)
2023-10-25 30870216 [email protected] Adds lint for checking argument commments (flutter/engine#47305)
2023-10-25 [email protected] Roll Dart SDK from 2791495ed583 to 73fa7b3e048a (1 revision) (flutter/engine#47304)
2023-10-25 [email protected] Roll Skia from 4848dd9b5dab to 0748053419cd (2 revisions) (flutter/engine#47302)
2023-10-25 [email protected] Roll Skia from 788eafdcf70d to 4848dd9b5dab (1 revision) (flutter/engine#47301)
2023-10-25 [email protected] Roll Skia from 5c315b761a24 to 788eafdcf70d (1 revision) (flutter/engine#47300)
2023-10-25 [email protected] Roll Skia from 18ad006ec7f9 to 5c315b761a24 (1 revision) (flutter/engine#47299)
2023-10-25 [email protected] Roll Dart SDK from 57661d5dbc1e to 2791495ed583 (1 revision) (flutter/engine#47298)
2023-10-25 [email protected] Roll Skia from 9537c25509ea to 18ad006ec7f9 (1 revision) (flutter/engine#47297)
2023-10-25 [email protected] Roll Fuchsia Mac SDK from YqSO1OByhoexFJSCr... to SOv1RJmbyDByvud8D... (flutter/engine#47296)
2023-10-25 [email protected] Roll Skia from d51d3bcbcacd to 9537c25509ea (1 revision) (flutter/engine#47295)
2023-10-25 [email protected] Roll Skia from f98fc9536c43 to d51d3bcbcacd (1 revision) (flutter/engine#47294)
2023-10-25 [email protected] Roll Fuchsia Linux SDK from tqukMrdJ6j-845-57... to vX5n99OIWgLX6bObI... (flutter/engine#47293)
2023-10-25 [email protected] Roll Skia from 0d4fcf388a6f to f98fc9536c43 (1 revision) (flutter/engine#47292)
2023-10-24 [email protected] [Impeller] Update shader compilation pipeline documentation to detail multi-arch archives. (flutter/engine#47289)
2023-10-24 [email protected] Roll Skia from 076a9dd0094f to 0d4fcf388a6f (2 revisions) (flutter/engine#47290)
2023-10-24 [email protected] OpenGL <4.x does not support stencil-only formats, so delete the TODO (flutter/engine#47286)
2023-10-24 [email protected] [Impeller] Unconditionally dither in gradient shader fragments. (flutter/engine#46746)
2023-10-24 [email protected] Roll Skia from f491209e969d to 076a9dd0094f (1 revision) (flutter/engine#47285)
2023-10-24 [email protected] [Impeller] Add support for multi-rendering-backend fat shader archives. (flutter/engine#47278)
2023-10-24 [email protected] Roll Skia from 502277be15cf to f491209e969d (1 revision) (flutter/engine#47281)
2023-10-24 [email protected] Roll Dart SDK from 360370ff93b0 to 57661d5dbc1e (1 revision) (flutter/engine#47280)
2023-10-24 30870216 [email protected] Migrated away from UnmodifiableUint8ListView (flutter/engine#47276)
2023-10-24 [email protected] Roll Skia from bc90585b0dd4 to 502277be15cf (1 revision) (flutter/engine#47277)
2023-10-24 1961493 [email protected] Reland "Use a single OffscreenCanvas for rendering in CanvasKit (#45744)" (flutter/engine#47241)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from tqukMrdJ6j-8 to zTq0jH2Y3Fl0
  fuchsia/sdk/core/mac-amd64 from YqSO1OByhoex to kNdyn03p28H7

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
...
auto-submit bot pushed a commit that referenced this pull request Oct 31, 2023
Closes flutter/flutter#112498.

We no longer support any user-visible configuration around dithering. It is unconditionally applied for gradients (in both the Skia and Impeller backends), and never applied elsewhere. After this change, I'll update https://docs.flutter.dev/release/breaking-changes/paint-enableDithering accordingly.

---

~~Requires #46746 to land successfully~~ Done.

Alright, this appears ready to review!
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