Implement square-like round superellipses with circular corners in the SDF uber shader#185370
Merged
Conversation
github-actions
Bot
added
engine
walley892
marked this pull request as ready for review
April 21, 2026 20:50
|
It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging. 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. If you believe this PR qualifies for a test exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!). The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group. |
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
Contributor
There was a problem hiding this comment.
Code Review
This pull request implements Signed Distance Field (SDF) rendering for round superellipses. It introduces the kRoundSuperellipse type, adds the superellipse distance function to the uber_sdf.frag shader, and updates Canvas::DrawRoundSuperellipse to use the SDF path for compatible geometries. Feedback includes a request to use triple-slash documentation for public members to comply with the style guide and a suggestion to optimize the shader logic by simplifying the transition check between circular and superellipse regions.
gaaclarke
reviewed
Apr 22, 2026
gaaclarke
left a comment
gaaclarke
left a comment
Member
There was a problem hiding this comment.
nice work, I can see us maybe wanting to use this all the time for performance reasons
gaaclarke
reviewed
Apr 22, 2026
gaaclarke
left a comment
gaaclarke
left a comment
Member
There was a problem hiding this comment.
This is looking good to me, we have existing tests that cover this? LGTM as long as we have tests and the goldens look good.
dkwingsmt
reviewed
Apr 22, 2026
dkwingsmt
left a comment
dkwingsmt
left a comment
Contributor
There was a problem hiding this comment.
LGTM except for comments.
| // | ||
| // https://iquilezles.org/articles/ellipsedist/ | ||
| // | ||
| // The MIT License |
Contributor
There was a problem hiding this comment.
Should we make this part a separated file, so that the license header is applied to an unambiguous range?
Member
There was a problem hiding this comment.
Yea, we plan on doing that. I had a pr but the file is in such flux I haven't gotten around to landing it yet.
dkwingsmt
previously approved these changes
Apr 23, 2026
dkwingsmt
left a comment
dkwingsmt
left a comment
Contributor
There was a problem hiding this comment.
LGTM. Thank you for the great work!
| .circle_center = circle_center, | ||
| .circle_max_angle = circle_max_angle, | ||
| .circle_start_angle = circle_start_angle, | ||
| .circle_radius = R, |
Contributor
There was a problem hiding this comment.
Isn't circle_start_angle equal to pi/2 - circle_max_angle? And R equal to the distance between the circle center and the bounds corner. I didn't add those two values because they could be simply derived from others.
I'm not against adding them if you find them useful, just concerned that the signature for MakeRoundedSuperellipse might be cleaner if duplicate information could be reduced.
Contributor
Author
There was a problem hiding this comment.
Oh my goodness 🤦 , it's even worse. circle_start_angle is always just pi/4. Removed circle_start_angle from everything and hardcoded it into the shader.
I think the radius can be derived from distance(circle_center, circle_start). I'm kind of worried about leaking the math into the canvas more than we already are though. I'm inclined to leave it for now, and refactor later by changing the UberSDFParameter::MakeRoundedSuperellipse signature to UberSDFParameter::MakeRoundedSuperellipse(RoundSuperEllipseParam param) and throw the mathy details in there after seeing what things look like after implementing the non-square case.
Thoughts?
Contributor
There was a problem hiding this comment.
Sounds good. We'll need a struct eventually if the plan to support asymetrical/uneven RSEs, since the four corners will have different params.
dkwingsmt
previously approved these changes
Apr 24, 2026
gaaclarke
approved these changes
Apr 24, 2026
walley892
added
the
autosubmit
flutter-dashboard
Bot
removed
the
autosubmit
This was referenced Apr 25, 2026
auto-submit Bot
pushed a commit
to flutter/packages
that referenced
this pull request
Apr 28, 2026
…11595) Manual roll Flutter from 31001886cbe8 to 61fca76dd523 (53 revisions) Manual roll requested by [email protected] flutter/flutter@3100188...61fca76 2026-04-27 [email protected] Adds integration test for the FLTEnableSDFs flag for iOS (flutter/flutter#185637) 2026-04-27 [email protected] Fix sdfs being enabled for MacOS regardless of FLTEnableSDFs value (flutter/flutter#185565) 2026-04-27 [email protected] Don't use UberSDF for paint with incompatible blend modes (flutter/flutter#184889) 2026-04-27 [email protected] Roll Dart SDK from de495e3de9a0 to 941ca325cfc9 (2 revisions) (flutter/flutter#185653) 2026-04-27 [email protected] [a11y] Add CONTENT_CHANGE_TYPE_EXPANDED support on android. (flutter/flutter#185305) 2026-04-27 [email protected] Roll pub packages (flutter/flutter#185641) 2026-04-27 [email protected] Modify analyze.dart to have flags to run only or exclude each verification step. (flutter/flutter#185618) 2026-04-27 [email protected] Fix debugNeedsPaint/Layout/CompositedLayerUpdate crashing in release mode (flutter/flutter#184627) 2026-04-27 [email protected] Enable `var_with_no_type_annotation` lint. (flutter/flutter#185215) 2026-04-27 [email protected] Fix SelectionArea handles overlapping context menu on Android (flutter/flutter#182663) 2026-04-27 [email protected] Adds debugging information to compiled metal shaders (flutter/flutter#185629) 2026-04-27 [email protected] Roll pub packages (flutter/flutter#185638) 2026-04-27 [email protected] Use null-aware elements in dev/devicelab/lib/framework/browser.dart (flutter/flutter#184778) 2026-04-27 [email protected] Sync CHANGELOG.md from stable (flutter/flutter#185633) 2026-04-27 [email protected] Added useOriginalColors flag which allows ImageIcon to bypass IconTheme colorization and use the original colors (flutter/flutter#180491) 2026-04-27 [email protected] Roll Packages from 8400f71 to 23280da (2 revisions) (flutter/flutter#185619) 2026-04-27 [email protected] Roll Skia from f1238e0f1022 to ce82d32b3e03 (1 revision) (flutter/flutter#185616) 2026-04-27 [email protected] [SwiftPM] Enable package resolution on xcodebuild commands (flutter/flutter#185208) 2026-04-27 [email protected] [iOS] Refactor keyboard inset logic into FlutterKeyboardInsetManager (flutter/flutter#185535) 2026-04-27 [email protected] [Win32] FlutterDesktopEngineGetGraphicsAdapter should use out parameter (flutter/flutter#185590) 2026-04-27 [email protected] Roll Skia from d77e3356d526 to f1238e0f1022 (4 revisions) (flutter/flutter#185604) 2026-04-27 [email protected] Roll Fuchsia Linux SDK from flsn8jC4LkTn6WECf... to i6d0NoDueUiXpePfX... (flutter/flutter#185601) 2026-04-26 [email protected] Roll Dart SDK from a108dfe2d227 to de495e3de9a0 (1 revision) (flutter/flutter#185599) 2026-04-26 [email protected] Roll Skia from ce9aa2231292 to d77e3356d526 (1 revision) (flutter/flutter#185596) 2026-04-26 [email protected] Roll Skia from 622fff4c24d2 to ce9aa2231292 (1 revision) (flutter/flutter#185588) 2026-04-25 [email protected] Roll Fuchsia Linux SDK from 9fPnyEo9PaNdXtasl... to flsn8jC4LkTn6WECf... (flutter/flutter#185585) 2026-04-25 [email protected] Roll Dart SDK from 605a8faf0dda to a108dfe2d227 (1 revision) (flutter/flutter#185584) 2026-04-25 [email protected] Roll Dart SDK from 6b8c39765f17 to 605a8faf0dda (1 revision) (flutter/flutter#185578) 2026-04-25 [email protected] Roll Skia from 185f6b57d64f to 622fff4c24d2 (1 revision) (flutter/flutter#185573) 2026-04-25 [email protected] Implement square-like round superellipses with circular corners in the SDF uber shader (flutter/flutter#185370) 2026-04-25 [email protected] Add @awaitNotRequired annotation to flutter sdk (flutter/flutter#181513) 2026-04-25 [email protected] Roll Dart SDK from 01228cb7af42 to 6b8c39765f17 (2 revisions) (flutter/flutter#185569) 2026-04-25 [email protected] Adapt the DisplayList benchmarks into a primitive rendering benchmark suite (flutter/flutter#185270) 2026-04-25 [email protected] Enable SPM for GoogleMobileAds (flutter/flutter#185548) 2026-04-25 [email protected] Roll Skia from 3f467a581942 to 185f6b57d64f (1 revision) (flutter/flutter#185564) 2026-04-25 [email protected] Fix Table crash when a cell child paints below the row bottom (flutter/flutter#185323) 2026-04-24 [email protected] Make sure that an Image doesn't crash in 0x0 environment (flutter/flutter#181154) 2026-04-24 [email protected] Roll Skia from 300d432048b0 to 3f467a581942 (3 revisions) (flutter/flutter#185558) 2026-04-24 [email protected] Roll Dart SDK from c26627715892 to 01228cb7af42 (4 revisions) (flutter/flutter#185559) 2026-04-24 [email protected] Reland "[web] Fix LateInitializationError in CkSurface and SkwasmSurface (#185116)" (flutter/flutter#185553) 2026-04-24 [email protected] [github]fix git ls-file glob pattern in labeler.yml instruction (flutter/flutter#185495) 2026-04-24 [email protected] [ios]update ios-reviewers tags to include more files (flutter/flutter#185490) 2026-04-24 [email protected] Add initial support for Cross-Origin Storage (flutter/flutter#184149) 2026-04-24 [email protected] tool: Skip cached engine artifacts with local engine (flutter/flutter#185546) ...
creatorpiyush
pushed a commit
to creatorpiyush/packages
that referenced
this pull request
Jun 10, 2026
…lutter#11595) Manual roll Flutter from 31001886cbe8 to 61fca76dd523 (53 revisions) Manual roll requested by [email protected] flutter/flutter@3100188...61fca76 2026-04-27 [email protected] Adds integration test for the FLTEnableSDFs flag for iOS (flutter/flutter#185637) 2026-04-27 [email protected] Fix sdfs being enabled for MacOS regardless of FLTEnableSDFs value (flutter/flutter#185565) 2026-04-27 [email protected] Don't use UberSDF for paint with incompatible blend modes (flutter/flutter#184889) 2026-04-27 [email protected] Roll Dart SDK from de495e3de9a0 to 941ca325cfc9 (2 revisions) (flutter/flutter#185653) 2026-04-27 [email protected] [a11y] Add CONTENT_CHANGE_TYPE_EXPANDED support on android. (flutter/flutter#185305) 2026-04-27 [email protected] Roll pub packages (flutter/flutter#185641) 2026-04-27 [email protected] Modify analyze.dart to have flags to run only or exclude each verification step. (flutter/flutter#185618) 2026-04-27 [email protected] Fix debugNeedsPaint/Layout/CompositedLayerUpdate crashing in release mode (flutter/flutter#184627) 2026-04-27 [email protected] Enable `var_with_no_type_annotation` lint. (flutter/flutter#185215) 2026-04-27 [email protected] Fix SelectionArea handles overlapping context menu on Android (flutter/flutter#182663) 2026-04-27 [email protected] Adds debugging information to compiled metal shaders (flutter/flutter#185629) 2026-04-27 [email protected] Roll pub packages (flutter/flutter#185638) 2026-04-27 [email protected] Use null-aware elements in dev/devicelab/lib/framework/browser.dart (flutter/flutter#184778) 2026-04-27 [email protected] Sync CHANGELOG.md from stable (flutter/flutter#185633) 2026-04-27 [email protected] Added useOriginalColors flag which allows ImageIcon to bypass IconTheme colorization and use the original colors (flutter/flutter#180491) 2026-04-27 [email protected] Roll Packages from 8400f71 to 23280da (2 revisions) (flutter/flutter#185619) 2026-04-27 [email protected] Roll Skia from f1238e0f1022 to ce82d32b3e03 (1 revision) (flutter/flutter#185616) 2026-04-27 [email protected] [SwiftPM] Enable package resolution on xcodebuild commands (flutter/flutter#185208) 2026-04-27 [email protected] [iOS] Refactor keyboard inset logic into FlutterKeyboardInsetManager (flutter/flutter#185535) 2026-04-27 [email protected] [Win32] FlutterDesktopEngineGetGraphicsAdapter should use out parameter (flutter/flutter#185590) 2026-04-27 [email protected] Roll Skia from d77e3356d526 to f1238e0f1022 (4 revisions) (flutter/flutter#185604) 2026-04-27 [email protected] Roll Fuchsia Linux SDK from flsn8jC4LkTn6WECf... to i6d0NoDueUiXpePfX... (flutter/flutter#185601) 2026-04-26 [email protected] Roll Dart SDK from a108dfe2d227 to de495e3de9a0 (1 revision) (flutter/flutter#185599) 2026-04-26 [email protected] Roll Skia from ce9aa2231292 to d77e3356d526 (1 revision) (flutter/flutter#185596) 2026-04-26 [email protected] Roll Skia from 622fff4c24d2 to ce9aa2231292 (1 revision) (flutter/flutter#185588) 2026-04-25 [email protected] Roll Fuchsia Linux SDK from 9fPnyEo9PaNdXtasl... to flsn8jC4LkTn6WECf... (flutter/flutter#185585) 2026-04-25 [email protected] Roll Dart SDK from 605a8faf0dda to a108dfe2d227 (1 revision) (flutter/flutter#185584) 2026-04-25 [email protected] Roll Dart SDK from 6b8c39765f17 to 605a8faf0dda (1 revision) (flutter/flutter#185578) 2026-04-25 [email protected] Roll Skia from 185f6b57d64f to 622fff4c24d2 (1 revision) (flutter/flutter#185573) 2026-04-25 [email protected] Implement square-like round superellipses with circular corners in the SDF uber shader (flutter/flutter#185370) 2026-04-25 [email protected] Add @awaitNotRequired annotation to flutter sdk (flutter/flutter#181513) 2026-04-25 [email protected] Roll Dart SDK from 01228cb7af42 to 6b8c39765f17 (2 revisions) (flutter/flutter#185569) 2026-04-25 [email protected] Adapt the DisplayList benchmarks into a primitive rendering benchmark suite (flutter/flutter#185270) 2026-04-25 [email protected] Enable SPM for GoogleMobileAds (flutter/flutter#185548) 2026-04-25 [email protected] Roll Skia from 3f467a581942 to 185f6b57d64f (1 revision) (flutter/flutter#185564) 2026-04-25 [email protected] Fix Table crash when a cell child paints below the row bottom (flutter/flutter#185323) 2026-04-24 [email protected] Make sure that an Image doesn't crash in 0x0 environment (flutter/flutter#181154) 2026-04-24 [email protected] Roll Skia from 300d432048b0 to 3f467a581942 (3 revisions) (flutter/flutter#185558) 2026-04-24 [email protected] Roll Dart SDK from c26627715892 to 01228cb7af42 (4 revisions) (flutter/flutter#185559) 2026-04-24 [email protected] Reland "[web] Fix LateInitializationError in CkSurface and SkwasmSurface (#185116)" (flutter/flutter#185553) 2026-04-24 [email protected] [github]fix git ls-file glob pattern in labeler.yml instruction (flutter/flutter#185495) 2026-04-24 [email protected] [ios]update ios-reviewers tags to include more files (flutter/flutter#185490) 2026-04-24 [email protected] Add initial support for Cross-Origin Storage (flutter/flutter#184149) 2026-04-24 [email protected] tool: Skip cached engine artifacts with local engine (flutter/flutter#185546) ...
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Adds support for square like Round Superellipses in the UberSDF shader.
Implemented by switching between a superellipse SDF and circular SDF depending on the test point's location.
This PR does not handle RoundSuperellipses with different x and y semi-axes, or RoundSuperellipses with non-circular corners.
May add some more goldens after checking coverage from the CICD run.
Fixes #185422
Pre-launch Checklist
///).