[skia-sync] Merge upstream chrome/m150 bug fixes

[mattleibow]

Automated upstream bug-fix sync for m150.

Companion skia PR: mono/skia#259

mono/SkiaSharp PR Summary: Update Skia milestone 150 (bug-fix sync)

Overview

Same-milestone sync: merged 2 upstream chrome/m150 cherry-picks.

Field	Value
Branch	skia-sync/m150
Target	main
Type	Same-milestone bug-fix sync (m150 → m150)
Submodule SHA	f6ee107ea5

Upstream Commits Merged

SHA	Title	Impact
14d05ec761	[m150] Resolved a Data Race on fStream in SkTypeface_Mac	🟡 macOS/CoreText typeface thread-safety fix — relevant to SkiaSharp
9f330f1704	[graphite] Use stable collection for static bindings	⚪ Graphite/Dawn only — no C API or Ganesh impact

Breaking Change Analysis

No breaking changes. Both commits are internal correctness fixes with no public or C API surface change:

• 14d05ec761 — [m150] Resolved a Data Race on fStream in SkTypeface_Mac
  • Affects src/ports/SkTypeface_mac_ct.{cpp,h}
  • Replaces the SkOnce stream-init guard with an SkSharedMutex (fStreamMutex): exclusive lock in onOpenStream, shared lock in onOpenExistingStream/onMakeClone
  • Fixes a data race where one thread initializing fStream could collide with another reading it. Relevant because the macOS/CoreText port backs SKTypeface on Apple platforms, where typefaces are commonly shared across threads.
• 9f330f1704 — [graphite] Use stable collection for static bindings
  • Only affects src/gpu/graphite/dawn/DawnGraphicsPipeline.cpp (std::vector → SkTBlockList/TArray for stable sampler-layout addresses)
  • SkiaSharp uses Ganesh, not Graphite/Dawn → zero runtime impact

Files Changed

File	Change
cgmanifest.json	Updated commitHash to f6ee107ea5 and upstream_merge_commit to 14d05ec761
externals/skia	Submodule bumped to f6ee107ea5

Version Changes

No version number changes (same milestone, same nuget version 4.150.0).

Binding Regeneration

Bindings were regenerated — no changes (C API signatures unchanged by both commits).

Items Needing Human Attention

None. This is a clean, low-risk same-milestone bug-fix sync.

The CI will run the full platform matrix (macOS, Windows, Linux ARM64, iOS, Android, WASM) as part of the PR pipeline.

Created by skia-upstream-sync.

[github-actions]

📦 Try the packages from this PR

Warning

Do not run these scripts without first reviewing the code in this PR.

Step 1 — Download the packages

bash / macOS / Linux:

curl -fsSL https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.sh | bash -s -- 4190

PowerShell / Windows:

iex "& { $(irm https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.ps1) } 4190"

Step 2 — Add the local NuGet source

dotnet nuget add source ~/.skiasharp/hives/pr-4190/packages --name skiasharp-pr-4190

More options

Option	Description
--successful-only / -SuccessfulOnly	Only use successful builds
--force / -Force	Overwrite previously downloaded packages
--list / -List	List available artifacts without downloading
--build-id ID / -BuildId ID	Download from a specific build

Or download manually from Azure Pipelines — look for the nuget artifact on the build for this PR.

Remove the source when you're done:

dotnet nuget remove source skiasharp-pr-4190

[github-actions]

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