mattleibow · April 28, 2026 12:48
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  <title>Release Notes — v3.119.4-preview.1.1..origin/main (2026-04-28)</title>
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Enables running SkiaSharp on Android's Bionic libc outside of the traditional Android runtime, supporting Android 10+.", "labels": ["new-platform"], "pr": 3217, "prUrl": "https://github.com/mono/SkiaSharp/pull/3217", "platforms": ["Linux-Bionic"], "slideBullet": "🌐 **Linux Bionic Support** — Run SkiaSharp natively on Android Bionic (AArch64/x64) for non-runtime Android scenarios"}, {"name": "Tizen 64-bit native build support (x64 and arm64)", "changeType": "platform", "importance": "major", "description": "Added 64-bit native builds for Tizen (x86_64 and aarch64) on Tizen 8.0 rootstraps. 32-bit Tizen targets (armel, i586) were removed as those platforms are past EOL.", "labels": ["new-platform"], "pr": 3620, "prUrl": "https://github.com/mono/SkiaSharp/pull/3620", "platforms": ["Tizen"], "slideBullet": "🌐 **Tizen 64-bit** — Native aarch64 and x86_64 builds for Tizen 8.0"}, {"name": "C++ standard upgraded to C++20", "changeType": "platform", "importance": "minor", "description": "All native builds upgraded from C++17 to C++20 to support newer Skia requirements. Apple platforms (iOS, macOS, tvOS) Xcode projects and Tizen project definitions updated accordingly.", "pr": 3702, "prUrl": "https://github.com/mono/SkiaSharp/pull/3702", "platforms": ["iOS", "macOS", "tvOS", "Tizen"]}, {"name": "Removed sfntly build flag from all platforms", "changeType": "platform", "importance": "patch", "description": "The skia_use_sfntly=false GN flag was removed from all native build scripts. Sfntly support has been removed from upstream Skia.", "pr": 3702, "prUrl": "https://github.com/mono/SkiaSharp/pull/3702", "platforms": ["Android", "iOS", "macOS", "tvOS", "Linux", "Windows", "Tizen", "WASM"]}, {"name": "PolySharp enables C# 13 on legacy target frameworks", "changeType": "platform", "importance": "minor", "description": "Added PolySharp 1.15.0 as a private build-time dependency, enabling use of modern C# 13 language features on older .NET target frameworks without carrying local attribute shims.", "pr": 3642, "prUrl": "https://github.com/mono/SkiaSharp/pull/3642"}, {"name": "Split Tizen native CI into per-architecture jobs", "changeType": "platform", "importance": "patch", "description": "Tizen CI now builds each architecture (x64, arm64) as a separate job for better parallelism and faster CI feedback.", "pr": 3672, "prUrl": "https://github.com/mono/SkiaSharp/pull/3672", "platforms": ["Tizen"]}, {"name": "Linked jsonreader module in Apple and Tizen native builds", "changeType": "platform", "importance": "patch", "description": "Native builds for Apple platforms (iOS, macOS, tvOS) and Tizen now link the jsonreader module required by Skia's Skottie animation support post-m133. Also removed the -all_load linker flag from Apple builds.", "pr": 3702, "prUrl": "https://github.com/mono/SkiaSharp/pull/3702", "platforms": ["iOS", "macOS", "tvOS", "Tizen"]}, {"name": "Gradient interpolation in wide-gamut color spaces", "changeType": "upstream", "importance": "minor", "description": "Gradient shaders can now interpolate colors in A98 RGB, ProPhoto RGB, Display P3, and Rec2020 color spaces. Apps using gradients with wide-gamut surfaces will see more accurate color transitions without any code changes.", "labels": ["skia-upstream"], "skiaMilestone": 134, "skiaFeature": "Gradient interpolation in A98 RGB, ProPhoto, P3, Rec2020", "pr": 3702, "prUrl": "https://github.com/mono/SkiaSharp/pull/3702", "notes": " (Delivered via Skia submodule bump)"}, {"name": "Rec.709 transfer function corrected to BT.1886", "changeType": "upstream", "importance": "minor", "description": "The kRec709 transfer function now matches the pure gamma 2.4 definition from ITU-R BT.1886. 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This brings improved security and performance for PNG operations.", "labels": ["skia-upstream"], "skiaMilestone": 142, "skiaFeature": "SkPngRustEncoder/Decoder promoted to public API", "pr": 3702, "prUrl": "https://github.com/mono/SkiaSharp/pull/3702", "notes": " (Delivered via Skia submodule bump)"}, {"name": "HDR metadata support in PNG", "changeType": "upstream", "importance": "minor", "description": "PNG decoding and encoding now support HDR metadata (content light level info and mastering display color volume). Apps working with HDR images in PNG format get proper metadata preservation automatically.", "labels": ["skia-upstream"], "skiaMilestone": 142, "skiaFeature": "HDR metadata in SkPngDecoder/SkPngEncoder", "slideBullet": "🖼️ **HDR PNG Metadata** — Automatic HDR metadata preservation when encoding and decoding PNG images", "pr": 3702, "prUrl": "https://github.com/mono/SkiaSharp/pull/3702", "notes": " (Delivered via Skia submodule bump)"}, {"name": "SkPath immutability migration with SkPathBuilder factories", "changeType": "upstream", "importance": "minor", "description": "Skia is migrating SkPath toward immutability, introducing new factory methods (Rect, Oval, Circle, RRect, Polygon, Line) and preferring SkPathBuilder for path construction. 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All NuGet packages, assembly versions, and file versions updated\n  - Update PackageReference from `3.x` to `4.x`\n  - No public API signatures removed — version change signals the large Skia engine upgrade\n\n## ✨ New APIs\n\n- **Variable font support** ([#3703](https://github.com/mono/SkiaSharp/pull/3703))\n  - `SKTypeface.VariationDesignParameters` / `VariationDesignPosition` — query font axes and positions\n  - `SKTypeface.Clone(ReadOnlySpan<SKFontVariationPositionCoordinate>)` — clone with custom design coordinates\n  - `SKFontVariationAxis`, `SKFontVariationPositionCoordinate`, `SKFontArguments`, `SKFourByteTag` types\n  - `HarfBuzzSharp.Face.VariationAxisInfos`, `TryFindVariationAxis`, `NamedInstanceCount`\n  - `HarfBuzzSharp.Font.SetVariations`, `SetVariationCoordsDesign`, `SetVariationCoordsNormalized`\n\n- **Color font palette support** ([#3742](https://github.com/mono/SkiaSharp/pull/3742))\n  - `SKTypeface.Clone(int paletteIndex)` / `Clone(SKFontArguments)` — clone with palette selection\n  - `SKFontPaletteOverride` type for custom color overrides\n  - `HarfBuzzSharp.Face.HasPalettes`, `PaletteCount`, `GetPaletteColors`, `GetPaletteFlags`\n  - `HarfBuzzSharp.Face.HasColorLayers`, `HasColorPng`, `HasColorSvg`\n\n- **SKSamplingOptions for surface drawing** ([#3491](https://github.com/mono/SkiaSharp/pull/3491), fixes [#3344](https://github.com/mono/SkiaSharp/issues/3344))\n  - `SKSurface.Draw(SKCanvas, float, float, SKSamplingOptions, SKPaint)`\n  - `SKCanvas.DrawSurface(SKSurface, float, float, SKSamplingOptions, SKPaint)`\n\n- **CICP color space creation** ([#3660](https://github.com/mono/SkiaSharp/pull/3660))\n  - `SKColorSpace.CreateCicp(SKColorspacePrimariesCicp, SKColorspaceTransferFnCicp)`\n\n- **New SKColorType values** ([#3702](https://github.com/mono/SkiaSharp/pull/3702))\n  - `SKColorType.Bgra10101010XR` — extended range 10-bit\n  - `SKColorType.RgbF16F16F16x` — opaque half-float RGB\n  - `SKColorType.R16Unorm` — 16-bit unsigned normalized single-channel\n\n- **SKPaint.GetFillPath with SKPathBuilder** ([#3702](https://github.com/mono/SkiaSharp/pull/3702))\n  - Six new overloads accepting SKPathBuilder as destination\n\n- **SKTypeface.Empty and IsEmpty** ([#3730](https://github.com/mono/SkiaSharp/pull/3730))\n  - Static `Empty` property and `IsEmpty` instance property\n\n## 🐛 Bug Fixes\n\n- **Fix SIGSEGV crash on Android API 36** ([#3730](https://github.com/mono/SkiaSharp/pull/3730), fixes [#3693](https://github.com/mono/SkiaSharp/issues/3693))\n  - Fatal crash during SKTypeface static initialization on Android 16\n  - Default typeface resolution moved to managed layer using SKFontManager\n\n- **Fix SKGLView not rendering after tab switch on Android** ([#3076](https://github.com/mono/SkiaSharp/pull/3076))\n  - SKGLView in MAUI TabBar would not render when revisited\n\n- **Fix SKTypeface.ContainsGlyphs infinite recursion** ([#3702](https://github.com/mono/SkiaSharp/pull/3702))\n  - The `ContainsGlyphs(ReadOnlySpan<byte>, SKTextEncoding)` overload was calling itself instead of delegating to the font\n\n- **Fix x86 .NET Framework threading test OOM failures** ([#3674](https://github.com/mono/SkiaSharp/pull/3674))\n\n## 🚀 Engine Improvements (Skia m132 → m147)\n\nThe Skia graphics engine was upgraded 15 milestones (m132 → m147). These improvements are automatic — no code changes needed:\n\n- **m134**: Gradient interpolation in A98 RGB, ProPhoto RGB, Display P3, and Rec2020 color spaces\n- **m142**: Rec.709 transfer function corrected to match BT.1886 (pure gamma 2.4)\n- **m142**: Rust PNG encoder/decoder promoted to official public API\n- **m142**: HDR metadata support in PNG (content light level, mastering display color volume)\n- **m142**: Removed fICCProfile/fICCProfileDescription from encoder options\n- **m143**: SkPath migrating to immutable with new SkPathBuilder factories\n- **m144**: kR16_unorm_SkColorType added\n- **m145**: skhdr::Agtm interface for SMPTE ST 2094-50 adaptive global tone mapping\n- **m145**: SkCodec MaxDecodeMemory protection against malicious images\n- **m146**: SkGradientShader.h → SkGradient.h header migration\n- **m146**: Path utilities (getSegment, filterPath, FillPathWithPaint) accept SkPathBuilder for zero-copy output\n\n## 📦 Dependencies\n\n- **Skia**: chrome/m132 → chrome/m147 ([#3660](https://github.com/mono/SkiaSharp/pull/3660), [#3702](https://github.com/mono/SkiaSharp/pull/3702))\n- **libpng**: 1.6.54 → 1.6.58 ([#3718](https://github.com/mono/SkiaSharp/pull/3718))\n- **libexpat**: 2.7.3 → 2.7.5 ([#3717](https://github.com/mono/SkiaSharp/pull/3717))\n\n## 🌐 Platform Changes\n\n- **Linux Bionic (Android NDK)** — New AArch64 and x64 native assets ([#3217](https://github.com/mono/SkiaSharp/pull/3217))\n- **Tizen 64-bit** — Native x86_64 and aarch64 builds for Tizen 8.0 ([#3620](https://github.com/mono/SkiaSharp/pull/3620))\n- **Tizen 32-bit removed** — armel and i586 targets dropped (EOL platforms)\n- **C++20** — All native builds upgraded from C++17 to C++20 ([#3702](https://github.com/mono/SkiaSharp/pull/3702))\n- **PolySharp** — C# 13 language features on legacy TFMs ([#3642](https://github.com/mono/SkiaSharp/pull/3642))\n- **sfntly removed** — Build flag dropped from all platforms (removed upstream)\n- **jsonreader linked** — Required for Skottie animation support post-m133"};</script>
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