Version 1.68.2

Rich API additions and performance improvements · Released April 30, 2020 · NuGet · GitHub Release

Highlights

This release brings a wealth of new drawing APIs to SKCanvas, floating-point color support via SKColorF, and significant performance gains from removing all use of reflection. Structs across the library now implement IEquatable<T> with proper equality operators, and memory management has been improved with array pooling and lifetime fixes.

Breaking Changes

None in this release.

New Features

Drawing & Canvas

SKColorF — Added floating-point color type with overloads across the API for high-precision color workflows.
SKCanvas.DrawAtlas — Draw sprite atlases with per-sprite transforms and colors.
SKCanvas.DrawPatch — Draw Coons patches for advanced gradient meshes.
SKCanvas.DrawArc — Draw arcs directly on the canvas.
SKCanvas.DrawRoundRectDifference — Draw the difference between two rounded rectangles.

Imaging & Shaders

SKImage.ToRasterImage() overload — Request explicit pixel data loading when converting to a raster image.
SKImage.ToTextureImage — Copy a CPU-backed image to a GPU texture.
ToShader() extensions — Added ToShader() to SKBitmap, SKImage, and SKPicture for convenient shader creation.
Perlin noise shaders — Improved support for Perlin noise shader generation.

Geometry & Math

SKMatrix helpers — Added Concat, PreConcat, and PostConcat members for cleaner matrix composition.
SKRegion operations — Added "quick" reject/contains members and region iterators for faster spatial queries.

Struct Improvements

IEquatable<T> — All structs now implement IEquatable<T> with proper Equals, GetHashCode, and equality operators.
Readonly getters — All struct getters are now readonly for better performance and correctness.
EditorBrowsable(Never) — Obsolete members are now hidden from IntelliSense.

Views & Platform Extensions

GTK extensions — Added extension methods for SKRect/SKPoint/SKSize conversion and image type conversions (SKImage/SKBitmap/SKPixmap ↔ Pixbuf).
SkiaSharp.Views.Forms.GTK — New package bringing SkiaSharp views to Xamarin.Forms on GTK.
Mouse wheel scrolling — Added scroll wheel support in Xamarin.Forms views. ❤️ @alexandrvslv
Touch device type & pressure — Added SKTouchDeviceType and touch pressure support on Android. ❤️ @mscherotter

Bug Fixes

Fixed passing null for image filters throwing an exception instead of being treated as no filter. ❤️ @Ziriax
Fixed passing null to SKPathMeasure throwing an exception. ❤️ @Ziriax
Fixed sampling issues with GPU-based views. ❤️ @validvoid
Fixed memory leak and crash in Xamarin.Forms views. ❤️ @zbyszekpy
Fixed several object lifetime and disposal bugs across the library.

Performance

Removed all use of reflection for a significant performance boost. ❤️ @Gillibald
Made use of array pools where possible to reduce allocations.
Multiple memory management improvements throughout the library.

Maintenance

Updated to Visual Studio 2019 and .NET Core 3.0.
Multi-targeting improvements. ❤️ @bender2k14
Updated minimum Android to v4.1 (API 16).
Updated Android NDK to r19c, MSVC to v14.2, and Clang to v9.0.
Updated ANGLE to the latest commit.
Updated Xamarin.Forms dependency to v4.4+.

Known Issues

WACK test false positive with vcruntime140_1_app.dll — this is resolved in the Windows Insider SDK.

Community Contributors ❤️

Contributor	What They Did
@Ziriax	Fixed null parameter handling in image filters and path measure
@Gillibald	Removed all reflection usage for major performance gains
@validvoid	Fixed GPU view sampling issues
@alexandrvslv	Added mouse wheel scrolling support
@mscherotter	Added touch device type and pressure on Android
@zbyszekpy	Fixed memory leak and crash in views
@bender2k14	Multi-targeting improvements