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iOS: Hardcode rendering API to Metal in tests (no-op) - #190422

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cbracken merged 1 commit into
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cbracken:sw-backend-hardcode-metal
Aug 3, 2026
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iOS: Hardcode rendering API to Metal in tests (no-op)#190422
cbracken merged 1 commit into
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cbracken:sw-backend-hardcode-metal

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@cbracken cbracken commented Aug 3, 2026

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Some of our tests were selecting a rendering API between kMetal and kSoftware. On iOS we no longer support any backend other than Metal.

enable_impeller is a static constexpr const bool that's hardcoded to true, so these expressions always evaluate to kMetal; the kSoftware arm is dead code. This replaces the ternaries with kMetal to clean up the code and save the compiler a few microseconds.

This removes the last references to IOSRenderingAPI::kSoftware outside the no-Metal fallback itself. I'll send a follow-up to delete that.

No changes to behaviour, and really no change to the compiled tests for that matter.

Issue: #190041
Issue: #112232

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Some of our tests were selecting a rendering API between kMetal and
kSoftware. On iOS we no longer support any backend other than Metal.

`enable_impeller` is a `static constexpr const bool` that's hardcoded to
`true`, so these expressions always evaluate to `kMetal`; the
`kSoftware` arm is dead code. This replaces the ternaries with `kMetal`
to clean up the code and save the compiler a few microseconds.

This removes the last references to `IOSRenderingAPI::kSoftware` outside
the no-Metal fallback itself. I'll send a follow-up to delete that.

No changes to behaviour, and really no change to the compiled tests for
that matter.
@cbracken
cbracken requested a review from a team as a code owner August 3, 2026 01:56
@flutter-dashboard flutter-dashboard Bot added the CICD Run CI/CD label Aug 3, 2026
@github-actions github-actions Bot added a: text input Entering text in a text field or keyboard related problems platform-ios iOS applications specifically engine flutter/engine related. See also e: labels. a: accessibility Accessibility, e.g. VoiceOver or TalkBack. (aka a11y) team-ios Owned by iOS platform team labels Aug 3, 2026
@cbracken
cbracken requested review from gaaclarke and removed request for a team August 3, 2026 01:57

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Code Review

This pull request updates several test files for the iOS platform view and accessibility bridge by hardcoding the rendering_api parameter to flutter::IOSRenderingAPI::kMetal during the instantiation of flutter::PlatformViewIOS, removing the previous conditional check based on the enable_impeller setting. There are no review comments, and I have no feedback to provide.

@cbracken
cbracken added this pull request to the merge queue Aug 3, 2026
Merged via the queue into flutter:master with commit 326fd6f Aug 3, 2026
23 checks passed
@cbracken
cbracken deleted the sw-backend-hardcode-metal branch August 3, 2026 21:16
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request Aug 10, 2026
…12406)

Manual roll Flutter from e52f01c920ad to b766512c65d8 (42 revisions)

Manual roll requested by stuartmorgan@google.com

flutter/flutter@e52f01c...b766512

2026-08-04 engine-flutter-autoroll@skia.org Roll Dart SDK from 2a799a2404e9 to 9859c0a39adb (4 revisions) (flutter/flutter#190521)
2026-08-04 154381524+flutteractionsbot@users.noreply.github.com Revert: iOS: Eliminate use of IOSContextNoop in platform view tests (flutter/flutter#190501)
2026-08-04 125822178+guszxtavo@users.noreply.github.com [Impeller] Enable ETC2/ASTC LDR/BC texture compression features at Vulkan device creation (flutter/flutter#189303)
2026-08-03 30870216+gaaclarke@users.noreply.github.com Remove openglessdf from impeller_unittests. (flutter/flutter#190469)
2026-08-03 1961493+harryterkelsen@users.noreply.github.com [web] Unify image decoding and codecs on CanvasKit and Skwasm (flutter/flutter#188573)
2026-08-03 chris@bracken.jp iOS: Eliminate use of IOSContextNoop in platform view tests (flutter/flutter#190419)
2026-08-03 evanwall@buffalo.edu Add path rendering benchmarks (flutter/flutter#188654)
2026-08-03 97480502+b-luk@users.noreply.github.com Add windows platform support for primitive_shape_test integration test (flutter/flutter#190464)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from 958c1c1921a1 to a08d918ebd6a (3 revisions) (flutter/flutter#190467)
2026-08-03 chris@bracken.jp tests: add --ios-runtime param (flutter/flutter#190414)
2026-08-03 chris@bracken.jp iOS: Remove the synchronous first-frame wait (flutter/flutter#190432)
2026-08-03 chris@bracken.jp iOS: Eliminate the Impeller/Skia backend selection params (flutter/flutter#190416)
2026-08-03 chris@bracken.jp iOS,macOS: Use @autoclosure in Logger (flutter/flutter#190417)
2026-08-03 chris@bracken.jp tools: Support FLUTTER_HOST_ARCH in update_dart_sdk scripts (flutter/flutter#190421)
2026-08-03 chris@bracken.jp iOS: Hardcode rendering API to Metal in tests (no-op) (flutter/flutter#190422)
2026-08-03 chris@bracken.jp a11y: Map disabled/read-only semantics to AX node restriction (flutter/flutter#190353)
2026-08-03 kevmoo@users.noreply.github.com [Infra] Replace defunct umbrella template with Wasm issue form (flutter/flutter#190471)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from abecb0dc02c1 to 958c1c1921a1 (4 revisions) (flutter/flutter#190459)
2026-08-03 engine-flutter-autoroll@skia.org Roll Dart SDK from 65b163be2485 to 2a799a2404e9 (3 revisions) (flutter/flutter#190454)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from 68efb3f2ad16 to abecb0dc02c1 (1 revision) (flutter/flutter#190443)
2026-08-03 engine-flutter-autoroll@skia.org Roll Packages from 5351d8c to ac87e65 (4 revisions) (flutter/flutter#190441)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from 5a761eb826c1 to 68efb3f2ad16 (1 revision) (flutter/flutter#190440)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from 4c9f8b4805e2 to 5a761eb826c1 (1 revision) (flutter/flutter#190437)
2026-08-03 ellie@edencrew.com [macOS] Resume app lifecycle on becomeActive to avoid frozen UI after occlusion (flutter/flutter#188772)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from 39cda9d6d7d2 to 4c9f8b4805e2 (6 revisions) (flutter/flutter#190426)
2026-08-03 engine-flutter-autoroll@skia.org Roll Skia from df13bfb5a54e to 39cda9d6d7d2 (2 revisions) (flutter/flutter#190425)
2026-08-02 chris@bracken.jp iOS: Serialise CADisplayLink access in VSyncClient tests (flutter/flutter#190335)
2026-08-02 engine-flutter-autoroll@skia.org Roll Skia from 32329e5643b5 to df13bfb5a54e (1 revision) (flutter/flutter#190394)
2026-08-02 bdero@google.com [Impeller] Skip binding dead-code-eliminated resources on Metal (flutter/flutter#190040)
2026-08-01 bdero@google.com [Flutter GPU] Raise Dart errors for invalid render pipelines and memoize per-draw pipeline state (flutter/flutter#189899)
2026-08-01 41930132+hellohuanlin@users.noreply.github.com Revert "Improve non rect platform view rendering  (#182662)" (flutter/flutter#190003)
2026-08-01 engine-flutter-autoroll@skia.org Roll Skia from ebf50520d720 to 32329e5643b5 (1 revision) (flutter/flutter#190389)
2026-08-01 engine-flutter-autoroll@skia.org Roll Skia from f73c4510d12d to ebf50520d720 (6 revisions) (flutter/flutter#190376)
2026-07-31 97480502+b-luk@users.noreply.github.com Primitive shape integration test (flutter/flutter#190368)
2026-07-31 97480502+b-luk@users.noreply.github.com Eliminate some early returns in uber_sdf.frag to fix broken UberSDF AA on Windows (flutter/flutter#190260)
2026-07-31 codefu@google.com chore: swiftshader mirrored + llvm16 (flutter/flutter#181225)
2026-07-31 1961493+harryterkelsen@users.noreply.github.com [web] Remove in-repo agent documentation (flutter/flutter#190326)
2026-07-31 30870216+gaaclarke@users.noreply.github.com [windows]: Uses offscreen MSAA when implicit msaa isn't available. (flutter/flutter#190256)
2026-07-31 srawlins@google.com flutter_tools: Use new FileSystemExtension from devtools (flutter/flutter#190360)
2026-07-31 engine-flutter-autoroll@skia.org Roll Dart SDK from c3acfc2479f6 to 65b163be2485 (1 revision) (flutter/flutter#190358)
2026-07-31 magder@google.com Use devicectl for screenshots on Xcode 27, remove idevicescreenshot artifact (flutter/flutter#189091)
2026-07-31 engine-flutter-autoroll@skia.org Roll Skia from 7ef86a5b0eb9 to f73c4510d12d (1 revision) (flutter/flutter#190352)

If this roll has caused a breakage, revert this CL and stop the roller
...
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a: accessibility Accessibility, e.g. VoiceOver or TalkBack. (aka a11y) a: text input Entering text in a text field or keyboard related problems CICD Run CI/CD engine flutter/engine related. See also e: labels. platform-ios iOS applications specifically team-ios Owned by iOS platform team

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