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[vulkan]: Adds depth/stencil synchronization for subpasses - #195689

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gaaclarke:vulkan-depth-stencil-store-sync
Nov 3, 2026
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auto-submit[bot] merged 2 commits into
flutter:masterfrom
gaaclarke:vulkan-depth-stencil-store-sync

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Note

This depends on #195596 to add the testing infrastructure

This PR adds dependencies to vulkan subpasses when a depth/stencil buffer is used. It was found to be a problem when enabling the synchronization validation layers.

fixes #195599

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@github-actions github-actions Bot added engine flutter/engine related. See also e: labels. e: impeller Impeller rendering backend issues and features requests labels Oct 30, 2026
@gaaclarke gaaclarke added the CICD Run CI/CD label Oct 30, 2026
…endency

The incoming VK_SUBPASS_EXTERNAL dependency only covered color attachment
output and fragment shader stages. When a render pass has a depth/stencil
attachment, add the early/late fragment test stages and depth/stencil
access to both the source and destination scopes so the layout transition
and loadOp are ordered after a prior pass's depth/stencil storeOp.

Re-enables the affected tests in the Vulkan sync validation shard.

Fixes flutter#195599
@gaaclarke
gaaclarke force-pushed the vulkan-depth-stencil-store-sync branch from ea49356 to 27adf51 Compare October 30, 2026 21:05
@gaaclarke
gaaclarke marked this pull request as ready for review October 30, 2026 21:06
@gaaclarke
gaaclarke requested a review from andywolff October 30, 2026 21:06

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Code Review

This pull request updates RenderPassBuilderVK to include depth/stencil fragment test stages and access flags in the external subpass dependency when a depth/stencil attachment is present. Additionally, it updates the mock Vulkan implementation to track render pass dependencies, adds corresponding unit tests, and re-enables several Vulkan tests in the test runner. There are no review comments, so I have no feedback to provide.

Rely on the Vulkan sync validation layers to cover the depth/stencil
incoming dependency instead of asserting on mock Vulkan state.

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LGTM. Note that this overlaps with #194990 which applies the same mask update in RenderPassBuilderVK::Build for the loadOp side of #194987, so if we land this first we should ask for a rebase

@gaaclarke gaaclarke added the autosubmit Merge PR when tree becomes green via auto submit App label Nov 3, 2026
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auto-submit Bot added this pull request to the merge queue Nov 3, 2026
Merged via the queue into flutter:master with commit b00ed1f Nov 3, 2026
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@flutter-dashboard flutter-dashboard Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Nov 3, 2026
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request Nov 3, 2026
Roll Flutter from fcfb4f203eae to 934720261be0 (38 revisions)

flutter/flutter@fcfb4f2...9347202

2026-11-03 [email protected] Roll Skia from 5bceaa033999 to c733ad3e37cb (5 revisions) (flutter/flutter#195872)
2026-11-03 [email protected] Roll Skia from 34d2bf479385 to 5bceaa033999 (9 revisions) (flutter/flutter#195864)
2026-11-03 [email protected] fix: prefer pointer events over semantics tap for mouse clicks on web (flutter/flutter#191529)
2026-11-03 [email protected] [VPAT] Expose a semantics text field value while it is not being edited (flutter/flutter#195445)
2026-11-03 [email protected] [Impeller] Make a GL context current before constructing an AiksContext without a surface (flutter/flutter#195629)
2026-11-03 [email protected] [flutter_tools] Eliminate globals.dart from project.dart (flutter/flutter#194066)
2026-11-03 [email protected] [tool] Complete context runner elimination and migrate AppContext usages to ToolContext (flutter/flutter#190797)
2026-11-03 [email protected] [web] Unify font collections between CanvasKit and Skwasm (flutter/flutter#195539)
2026-11-03 [email protected] [Android] Replay predictive back state for retained engines (flutter/flutter#192286)
2026-11-03 [email protected] [vulkan]: Adds depth/stencil synchronization for subpasses (flutter/flutter#195689)
2026-11-03 [email protected] [web] Honor requested upscaling in instantiateImageCodecWithSize and ImageDescriptor.instantiateCodec (flutter/flutter#195836)
2026-11-03 [email protected] Roll Skia from 866b61ca92c9 to 34d2bf479385 (9 revisions) (flutter/flutter#195848)
2026-11-03 [email protected] Roll Fuchsia Test Scripts from xl1LWBuppzu-BnOzV... to B6zarykZp6PKWRueg... (flutter/flutter#195847)
2026-11-03 [email protected] Remove unused ffi (flutter/flutter#195710)
2026-11-02 [email protected] Revert: [Android] Let the raster thread use every core of a chip without little cores (flutter/flutter#195838)
2026-11-02 [email protected] Run 10 impeller iOS benchmarks as one devicelab task (flutter/flutter#195661)
2026-11-02 [email protected] Use named uniforms instead of setFloat in StretchEffect (flutter/flutter#195372)
2026-11-02 [email protected] [flutter_tools] Report when the browser disconnects during a web test run (flutter/flutter#192198)
2026-11-02 [email protected] fix: Resolve memory leak in image_list example (flutter/flutter#189526)
2026-11-02 [email protected] Only run the common local engine configurations in presubmit (flutter/flutter#195688)
2026-11-02 [email protected] Update gcloud_version to version [email protected] (flutter/flutter#195769)
2026-11-02 [email protected] [Impeller] Order the Vulkan copy-texture-to-texture layout transition after the copy (flutter/flutter#195814)
2026-11-02 [email protected] [Impeller] Order the Vulkan ResizeTexture layout transition after its blit (flutter/flutter#195721)
2026-11-02 [email protected] [web] Fix CanvasKit fragment shader uniforms being freed or mutated after recording (flutter/flutter#195718)
2026-11-02 [email protected] Roll Fuchsia Linux SDK from MqypI6RNyVZ_FLUE-... to T_-6-6X1lDMghhAvX... (flutter/flutter#195809)
2026-11-02 [email protected] [Android] Log why Impeller falls back to OpenGLES (flutter/flutter#194764)
2026-11-02 [email protected] Roll Skia from 3f35fb6e591b to 866b61ca92c9 (11 revisions) (flutter/flutter#195802)
2026-11-02 [email protected] Roll Skia from 3f35fb6e591b to 866b61ca92c9 (11 revisions) (flutter/flutter#195802)
2026-11-02 [email protected] Only run the common local engine configurations in presubmit (flutter/flutter#195688)
2026-11-02 [email protected] Balance tool_integration_tests subshards by expected duration (flutter/flutter#195628)
2026-11-02 [email protected] [web_paragraph] Map code units without a cluster to a cluster (flutter/flutter#195384)
2026-11-02 [email protected] [web] Hide synthetic autofill inputs from assistive technology (flutter/flutter#195618)
2026-11-02 [email protected] Roll Packages from 3742a4e to 3f34a6f (8 revisions) (flutter/flutter#195795)
2026-11-02 [email protected] [web] Unskip web tests that pass on CanvasKit and Skwasm: platform_view_test, route_notification_messages_test (flutter/flutter#195605)
2026-11-02 [email protected] Roll Skia from e5ad3868b8db to 3f35fb6e591b (1 revision) (flutter/flutter#195789)
2026-11-02 [email protected] Roll Skia from f5215e74aa16 to e5ad3868b8db (3 revisions) (flutter/flutter#195779)
2026-11-02 [email protected] Roll Skia from e43478a2f9f8 to f5215e74aa16 (1 revision) (flutter/flutter#195776)
2026-11-01 [email protected] Roll Fuchsia Linux SDK from kW0A0xxNkqf38ljm4... to MqypI6RNyVZ_FLUE-... (flutter/flutter#195768)

If this roll has caused a breakage, revert this CL and set the roller
to dry run mode 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
...
jpohhhh added a commit to Telosnex/flutter that referenced this pull request Nov 4, 2026
…y tests

flutter#195714 added eColorAttachmentRead to the incoming dependency's destination
access, and flutter#195689 landed the depth/stencil masks this PR originally added.
Update the expected masks to match.
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[Impeller] Vulkan sync validation: render pass incoming dependency doesn't cover a prior pass's depth/stencil storeOp

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