[skia-sync] Update skia to milestone 149

[mattleibow]

Automated Skia milestone bump from m147 to m149.

Companion skia PR: mono/skia#247

mono/SkiaSharp PR: Skia m147 → m149

Version Changes

Component	Old	New
Milestone	147	149
libSkiaSharp soname	147.0.0	149.0.0

Breaking Change Analysis: kR16_float_SkColorType

Severity: 🔴 HIGH — inserted mid-enum, shifted all subsequent values +1

C# Enum	Old Value	New Value
R16Float	(new)	21
RgF16	21	22
Alpha16	22	23
R16Unorm	23 → 27	24 → 27 (continued shifting)

Note: Existing SKColorType public enum values for all previously-existing members are unchanged (RgF16 = 15, Alpha16 = 16, etc.). Only the internal SKColorTypeNative generated enum values shifted; the mapping layer (EnumMappings.cs) handles the translation transparently. Public ABI is preserved.

Files Changed

C# Binding Changes

File	Change
binding/SkiaSharp/SkiaApi.generated.cs	Added R16Float = 21, shifted subsequent native enum values
binding/SkiaSharp/Definitions.cs	Added SKColorType.R16Float = 28 to public enum; added 2-bytes-per-pixel, shift=1, Opaque alpha type
binding/SkiaSharp/EnumMappings.cs	Added R16Float ↔ R16Float to both ToNative and FromNative mappings
binding/SkiaSharp/GRDefinitions.cs	Added R16Float => R16F GL sized format mapping

Version Files

File	Change
scripts/VERSIONS.txt	Milestone 147→149, soname 147.0.0→149.0.0
cgmanifest.json	Updated commitHash, chrome_milestone 147→149

Build Results

• Native build (Linux x64): ✅ Success — libSkiaSharp.so.149.0.0, libHarfBuzzSharp.so.0.61420.0
• C# build: ✅ 0 errors, 0 warnings
• Build workaround: The CI runner lacks libc++-dev. Built using NDK clang with patched libc++ headers (ABI namespace patched to std::__1:: to match NDK's Linux libc++.a).

Test Results

• Total: 5683 tests
• Passed: 5451 ✅
• Failed: 61 ⚠️ (pre-existing font/typeface failures — see below)
• Skipped: 171

Verified Working

• ✅ All color type tests (SKBitmapTest, SKImageTest, SKCanvasTest, SKPixmapTest)
• ✅ All enum mapping tests (EnumMappingsTest — 118 tests including R16Float mappings)
• ✅ GRContextTest.ToGlSizedFormat (fixed: was missing R16Float case)

Pre-existing Failures (61 tests, all font/typeface related)

All 61 failures are in SKFontTest, SKPaintTest, SKTypefaceTest, SKFontManagerTest, SKFontStyleSetTest.
Root cause: SKTypeface.Default.FamilyName returns empty string on this runner.

• legacyMakeTypeface(null) returns a valid typeface handle, but with empty family name
• System fontconfig is functional (fc-match finds "DejaVu Sans")
• These failures are NOT caused by m149 changes; no font/typeface code was modified
• These tests pass in Docker container environments (see tests/Dockerfile.linux)
• ⚠️ Human review needed: Verify these tests pass in the full CI container environment

Items Needing Human Attention

1. Font test failures: 61 pre-existing failures on bare Linux runners without Docker — verify green in CI containers
2. libc++ build environment: The Linux x64 native build requires a container with libc++-dev installed; this sync used an NDK-based workaround that is functionally equivalent but not the standard approach
3. New SKColorType.R16Float = 28: New public API — follows the existing pattern for R-channel color types (2 bytes, opaque, GL format R16F)

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 -- 4118

PowerShell / Windows:

iex "& { $(irm https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.ps1) } 4118"

Step 2 — Add the local NuGet source

dotnet nuget add source ~/.skiasharp/hives/pr-4118/packages --name skiasharp-pr-4118

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-4118

[mattleibow]

Closing this stale auto-generated skia-sync PR. The active milestone work is the m148 update (#4125 / mono/skia#250); future milestones can be regenerated by the auto-sync workflow when needed.