[framework] reduce ink sparkle uniform count. #133897

jonahwilliams · 2023-09-02T00:54:23Z

Due to the number of uniforms present, the ink_sparkle shader can't run without post processing (on all target platforms) that the impellerc offline compiler doesn't perform. However, we can't just move the uniforms into a uniform buffer object (UBO) because the Skia backend doesn't support it.

Rather than work around this in the compiler, we can reduce the uniform count by 1) packing four floats into a single vec4 2) removing a uniform for what is effectively a constant.

This should have no visible effects, and if any scubas fail it means I did this wrong 😆

flutter-dashboard · 2023-09-02T00:54:25Z

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?

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

Hixie · 2023-09-02T03:29:59Z

test-exempt: code refactor with no semantic change

bdero

LGTM

jonahwilliams · 2023-09-07T18:17:10Z

This is waiting on the g3 roll to catch up 🤷

chinmaygarde · 2023-09-08T19:38:54Z

packages/flutter/lib/src/material/shaders/ink_sparkle.frag

-layout(location = 15) uniform vec2 u_rotation2;
-layout(location = 16) uniform vec2 u_rotation3;
+// u_alpha, u_sparkle_alpha, u_blur, u_radius_scale
+layout(location = 1) uniform vec4 u_composite_1;


Drive by comment: The brittle-ness of specifying locations explicitly and then matching the same in Dart code seems egregious. The compiler auto-generates these and produces metdata. The C++ side uses this metadata for example. Perhaps we could do the same for Dart?

If you want to be the next lemming to walk off the cliff of getting Dart code gen to work, be my guest, however I will not be working on this 😄

I was thinking of something along the lines of JSON file that is read at runtime that contains a mapping between uniform names and their locations.

But, I must admit I haven't been burned by attempts to get Dart code-gen to work... yet. Perhaps why we can document why it sucks. We are generating code in C++ and I'd say it has worked... fine? Are we talking about specific challenges with Dart that will make it way harder than the engine C++ setup?

auto-submit · 2023-09-13T01:30:04Z

auto label is removed for flutter/flutter/133897, due to - The status or check suite Mac build_tests_4_4 has failed. Please fix the issues identified (or deflake) before re-applying this label.

jonahwilliams · 2023-09-13T19:27:37Z

The google testing shard has continued to fail due to timeouts on g3 infra. I've marked it as passing and will land it.

…r#133897)

flutter/flutter@61b890b...58ba6c2 2023-09-14 [email protected] Roll Packages from 06cd9e9 to 275b76c (1 revision) (flutter/flutter#134734) 2023-09-14 [email protected] Update plugin_ffi generated file to match FFIgen 9.0.0 (flutter/flutter#134614) 2023-09-14 [email protected] LinkedText (Linkify) (flutter/flutter#125927) 2023-09-14 [email protected] _DayPicker should build days using separate stetefull widget _Day. (flutter/flutter#134607) 2023-09-13 [email protected] Remove `Path.combine` call from `CupertionoTextSelectionToolbar` (flutter/flutter#134369) 2023-09-13 [email protected] Update KeepAlive.debugTypicalAncestorWidgetClass (flutter/flutter#133498) 2023-09-13 [email protected] Fix null check crash by ReorderableList (flutter/flutter#132153) 2023-09-13 [email protected] Roll Flutter Engine from 154d6fd601a3 to cd90cc8469fb (3 revisions) (flutter/flutter#134691) 2023-09-13 49699333+dependabot[bot]@users.noreply.github.com Bump github/codeql-action from 2.21.5 to 2.21.6 (flutter/flutter#134692) 2023-09-13 [email protected] Roll Flutter Engine from b71b366e3de3 to 154d6fd601a3 (6 revisions) (flutter/flutter#134683) 2023-09-13 [email protected] [flutter_tools] Run ShutdownHooks when handling signals (flutter/flutter#134590) 2023-09-13 [email protected] Dispose routes in navigator when throwing exception (flutter/flutter#134596) 2023-09-13 [email protected] [framework] reduce ink sparkle uniform count. (flutter/flutter#133897) 2023-09-13 [email protected] Roll Flutter Engine from 5e671d5c90f9 to b71b366e3de3 (4 revisions) (flutter/flutter#134676) 2023-09-13 [email protected] Set the CONFIGURATION_BUILD_DIR in generated xcconfig when debugging core device (flutter/flutter#134493) 2023-09-13 [email protected] Bump gradle heap size limit in *everywhere* (flutter/flutter#134665) 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],[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 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

Fixes flutter#133325 Due to the number of uniforms present, the ink_sparkle shader can't run without post processing (on all target platforms) that the impellerc offline compiler doesn't perform. However, we can't just move the uniforms into a uniform buffer object (UBO) because the Skia backend doesn't support it. Rather than work around this in the compiler, we can reduce the uniform count by 1) packing four floats into a single vec4 2) removing a uniform for what is effectively a constant. This should have no visible effects, and if any scubas fail it means I did this wrong ð��

…r#133897)

[framework] reduce ink sparkle uniform count.

18d8502

github-actions bot added framework flutter/packages/flutter repository. See also f: labels. f: material design flutter/packages/flutter/material repository. labels Sep 2, 2023

Jonah Williams added 3 commits September 5, 2023 09:32

Merge branch 'master' into reduce_uniform_ink_sparkle

0675589

Merge branch 'master' into reduce_uniform_ink_sparkle

93c6037

Merge branch 'master' into reduce_uniform_ink_sparkle

0b28f0c

jonahwilliams requested review from bdero, gaaclarke and matanlurey September 6, 2023 19:01

matanlurey approved these changes Sep 6, 2023

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bdero approved these changes Sep 6, 2023

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jonahwilliams added the autosubmit Merge PR when tree becomes green via auto submit App label Sep 6, 2023

chinmaygarde added the e: impeller Impeller rendering backend issues and features requests label Sep 8, 2023

chinmaygarde assigned jonahwilliams Sep 8, 2023

chinmaygarde reviewed Sep 8, 2023

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Merge branch 'master' into reduce_uniform_ink_sparkle

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auto-submit bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Sep 13, 2023

jonahwilliams added the autosubmit Merge PR when tree becomes green via auto submit App label Sep 13, 2023

auto-submit bot merged commit 2daf917 into flutter:master Sep 13, 2023

engine-flutter-autoroll mentioned this pull request Sep 14, 2023

Roll Flutter from 61b890bfcbc1 to 58ba6c295d8c (16 revisions) flutter/packages#4928

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Sep 14, 2023

2daf917 [framework] reduce ink sparkle uniform count. (flutter/flutte…

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…r#133897)

HansMuller mentioned this pull request Sep 15, 2023

Flutter Framework Team: Notable Commits #121415

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Nov 15, 2023

2daf917 [framework] reduce ink sparkle uniform count. (flutter/flutte…

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…r#133897)

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