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[Impeller] Directly tessellate conics to linear path segments #166165

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merged 2 commits into from
Apr 1, 2025
Merged

[Impeller] Directly tessellate conics to linear path segments #166165

merged 2 commits into from
Apr 1, 2025
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flar
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@flar flar commented Mar 28, 2025

Impeller has been approximating conic segments with a pair of quadratic segments - a simplification that only works well for simple 90 degree circular conics, but is a poor approximation for tighter conics.

We now approximate a reasonable number of line segments to approximate the conic with directly and directly flatten the conics into the tessellation buffers.

@github-actions github-actions bot added engine flutter/engine repository. See also e: labels. e: impeller Impeller rendering backend issues and features requests labels Mar 28, 2025
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flar commented Mar 28, 2025

I just realized that while I've changed our rendering for the tests that generate Impeller paths directly, the ui.Path code still generates an SkPath which is still translated into an impeller::Path with an approximated pair of quadratic curves. I'll need to teach that code to preserve the conics before this benefits Flutter apps.

jonahwilliams
jonahwilliams approved these changes Mar 28, 2025
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LGTM

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Golden file changes have been found for this pull request. Click here to view and triage (e.g. because this is an intentional change).

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Changes reported for pull request #166165 at sha bdde4a3

@flutter-dashboard flutter-dashboard bot added the will affect goldens Changes to golden files label Mar 31, 2025
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Still LGTM

@flar flar added the autosubmit Merge PR when tree becomes green via auto submit App label Mar 31, 2025
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Merged via the queue into flutter:master with commit 0a22ff9 Apr 1, 2025
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auto-submit bot pushed a commit to flutter/packages that referenced this pull request Apr 2, 2025
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Roll Flutter from 05b5e7910544 to a0b1b3253416 (37 revisions) (#8985)
8f5844a 
Roll Flutter from 05b5e7910544 to a0b1b3253416 (37 revisions)

flutter/flutter@05b5e79...a0b1b32

2025-04-01 [email protected] Roll Dart SDK from b4d374ec59ec to 4e1f02bc704f (2 revisions) (flutter/flutter#166342)
2025-04-01 [email protected] Trim any text before osascript JSON response (flutter/flutter#166296)
2025-04-01 [email protected] [Gen-l10n] Add `Message.resourceId` and `locale` to all `L10nException` error messages (flutter/flutter#163654)
2025-04-01 [email protected] Add `--ignore-timeouts` flag for `flutter test` command (flutter/flutter#164437)
2025-04-01 [email protected] Update TESTOWNERS username (flutter/flutter#166191)
2025-04-01 [email protected] Roll Skia from 4b07443e6071 to 52cbb917fffd (4 revisions) (flutter/flutter#166329)
2025-04-01 [email protected] Roll Dart SDK from 6b07a09cbd2d to b4d374ec59ec (2 revisions) (flutter/flutter#166321)
2025-04-01 [email protected] [tool] Improve using project files in build targets (flutter/flutter#166211)
2025-04-01 [email protected] Rename FlRenderer to FlCompositorOpenGL (flutter/flutter#166037)
2025-04-01 [email protected] [engine, web_ui] Fix instances of library_private_types_in_public_api (flutter/flutter#166156)
2025-04-01 [email protected] Roll Dart SDK from 509faa921c95 to 6b07a09cbd2d (1 revision) (flutter/flutter#166301)
2025-04-01 [email protected] [Impeller] small cpu perf for text contents. (flutter/flutter#166199)
2025-04-01 [email protected] [android_engine_test] disable old HC mode tests. (flutter/flutter#166293)
2025-04-01 [email protected] [impeller] fixes diagonal antialiased lines (flutter/flutter#166298)
2025-04-01 [email protected] Roll Skia from 5f262bd2cbb4 to 4b07443e6071 (10 revisions) (flutter/flutter#166299)
2025-03-31 [email protected] [Impeller] Directly tessellate conics to linear path segments (flutter/flutter#166165)
2025-03-31 [email protected] [tool] Don't write the .flutter-plugins-dependencies file if it is unchanged (flutter/flutter#166164)
2025-03-31 [email protected] Move `.cxx` directory out of `android/app` (flutter/flutter#166277)
2025-03-31 [email protected] Fix typo in carousel.dart (flutter/flutter#164727)
2025-03-31 [email protected] Roll Dart SDK from c5fa06710bb6 to 509faa921c95 (1 revision) (flutter/flutter#166283)
2025-03-31 [email protected] Public nodes needing paint or layout (flutter/flutter#166148)
2025-03-31 [email protected] [Gen-l10n] Infer placeholder types on both templates and localizations (flutter/flutter#163690)
2025-03-31 [email protected] [Engine][iOS] Cancel animation when recieved `UIKeyboardWillHideNotification` with duration 0.0 (flutter/flutter#164884)
2025-03-31 [email protected] [fuchsia] Remove explicit LogSink and InspectSink routing and use dictionaries instead (flutter/flutter#162780)
2025-03-31 [email protected] Updated to latest AVD to Support Android 16 (API 36) (flutter/flutter#165926)
2025-03-31 [email protected] Feat: Add brightnessOf method for theme (flutter/flutter#163733)
2025-03-31 [email protected] Marks Linux_mokey new_gallery__crane_perf to be flaky (flutter/flutter#165964)
2025-03-31 [email protected] [ Tool ] Correctly select entrypoint target for web build from positional argument list (flutter/flutter#166260)
2025-03-31 [email protected] [Impeller] remove validation warning ignores. (flutter/flutter#166205)
2025-03-31 [email protected] [Impeller] handle shader ordering bug on macOS. (flutter/flutter#165937)
2025-03-31 [email protected] Fix CODEOWNERS for the iOS review team (flutter/flutter#166178)
2025-03-31 [email protected] Remove `<meta content="IE=Edge" http-equiv="X-UA-Compatible">` (flutter/flutter#166252)
2025-03-31 [email protected] Roll Dart SDK from b9c35e05feb5 to c5fa06710bb6 (1 revision) (flutter/flutter#166251)
2025-03-31 [email protected] Roll Skia from 418c68ea5ccb to 5f262bd2cbb4 (2 revisions) (flutter/flutter#166244)
2025-03-31 [email protected] Roll Skia from b6a3bbd1d153 to 418c68ea5ccb (1 revision) (flutter/flutter#166236)
2025-03-31 [email protected] [Impeller] fix min filter for GL external textures. (flutter/flutter#166224)
2025-03-31 [email protected] Roll Skia from 10f4cf9a817d to b6a3bbd1d153 (13 revisions) (flutter/flutter#166231)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages
Please CC [email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

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

...
masterromuald pushed a commit to masterromuald/packages that referenced this pull request Apr 3, 2025
@engine-flutter-autoroll @masterromuald
Roll Flutter from 05b5e7910544 to a0b1b3253416 (37 revisions) (flutte…
894e301 
…r#8985)

Roll Flutter from 05b5e7910544 to a0b1b3253416 (37 revisions)

flutter/flutter@05b5e79...a0b1b32

2025-04-01 [email protected] Roll Dart SDK from b4d374ec59ec to 4e1f02bc704f (2 revisions) (flutter/flutter#166342)
2025-04-01 [email protected] Trim any text before osascript JSON response (flutter/flutter#166296)
2025-04-01 [email protected] [Gen-l10n] Add `Message.resourceId` and `locale` to all `L10nException` error messages (flutter/flutter#163654)
2025-04-01 [email protected] Add `--ignore-timeouts` flag for `flutter test` command (flutter/flutter#164437)
2025-04-01 [email protected] Update TESTOWNERS username (flutter/flutter#166191)
2025-04-01 [email protected] Roll Skia from 4b07443e6071 to 52cbb917fffd (4 revisions) (flutter/flutter#166329)
2025-04-01 [email protected] Roll Dart SDK from 6b07a09cbd2d to b4d374ec59ec (2 revisions) (flutter/flutter#166321)
2025-04-01 [email protected] [tool] Improve using project files in build targets (flutter/flutter#166211)
2025-04-01 [email protected] Rename FlRenderer to FlCompositorOpenGL (flutter/flutter#166037)
2025-04-01 [email protected] [engine, web_ui] Fix instances of library_private_types_in_public_api (flutter/flutter#166156)
2025-04-01 [email protected] Roll Dart SDK from 509faa921c95 to 6b07a09cbd2d (1 revision) (flutter/flutter#166301)
2025-04-01 [email protected] [Impeller] small cpu perf for text contents. (flutter/flutter#166199)
2025-04-01 [email protected] [android_engine_test] disable old HC mode tests. (flutter/flutter#166293)
2025-04-01 [email protected] [impeller] fixes diagonal antialiased lines (flutter/flutter#166298)
2025-04-01 [email protected] Roll Skia from 5f262bd2cbb4 to 4b07443e6071 (10 revisions) (flutter/flutter#166299)
2025-03-31 [email protected] [Impeller] Directly tessellate conics to linear path segments (flutter/flutter#166165)
2025-03-31 [email protected] [tool] Don't write the .flutter-plugins-dependencies file if it is unchanged (flutter/flutter#166164)
2025-03-31 [email protected] Move `.cxx` directory out of `android/app` (flutter/flutter#166277)
2025-03-31 [email protected] Fix typo in carousel.dart (flutter/flutter#164727)
2025-03-31 [email protected] Roll Dart SDK from c5fa06710bb6 to 509faa921c95 (1 revision) (flutter/flutter#166283)
2025-03-31 [email protected] Public nodes needing paint or layout (flutter/flutter#166148)
2025-03-31 [email protected] [Gen-l10n] Infer placeholder types on both templates and localizations (flutter/flutter#163690)
2025-03-31 [email protected] [Engine][iOS] Cancel animation when recieved `UIKeyboardWillHideNotification` with duration 0.0 (flutter/flutter#164884)
2025-03-31 [email protected] [fuchsia] Remove explicit LogSink and InspectSink routing and use dictionaries instead (flutter/flutter#162780)
2025-03-31 [email protected] Updated to latest AVD to Support Android 16 (API 36) (flutter/flutter#165926)
2025-03-31 [email protected] Feat: Add brightnessOf method for theme (flutter/flutter#163733)
2025-03-31 [email protected] Marks Linux_mokey new_gallery__crane_perf to be flaky (flutter/flutter#165964)
2025-03-31 [email protected] [ Tool ] Correctly select entrypoint target for web build from positional argument list (flutter/flutter#166260)
2025-03-31 [email protected] [Impeller] remove validation warning ignores. (flutter/flutter#166205)
2025-03-31 [email protected] [Impeller] handle shader ordering bug on macOS. (flutter/flutter#165937)
2025-03-31 [email protected] Fix CODEOWNERS for the iOS review team (flutter/flutter#166178)
2025-03-31 [email protected] Remove `<meta content="IE=Edge" http-equiv="X-UA-Compatible">` (flutter/flutter#166252)
2025-03-31 [email protected] Roll Dart SDK from b9c35e05feb5 to c5fa06710bb6 (1 revision) (flutter/flutter#166251)
2025-03-31 [email protected] Roll Skia from 418c68ea5ccb to 5f262bd2cbb4 (2 revisions) (flutter/flutter#166244)
2025-03-31 [email protected] Roll Skia from b6a3bbd1d153 to 418c68ea5ccb (1 revision) (flutter/flutter#166236)
2025-03-31 [email protected] [Impeller] fix min filter for GL external textures. (flutter/flutter#166224)
2025-03-31 [email protected] Roll Skia from 10f4cf9a817d to b6a3bbd1d153 (13 revisions) (flutter/flutter#166231)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages
Please CC [email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

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

...
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