Add SKSamplingOptions support to SKSurface.Draw and SKCanvas.DrawSurface

[Copilot]

Summary

Fixes #3344

This PR adds SKSamplingOptions parameter support to SKSurface.Draw and SKCanvas.DrawSurface methods, allowing users to specify sampling options when drawing surfaces.

Changes

C API (externals/skia)

• Added sk_surface_draw_with_sampling() function

C# API

• Added SKSurface.Draw(SKCanvas, float, float, SKSamplingOptions, SKPaint) overload
• Added SKSurface.Draw(SKCanvas, SKPoint, SKSamplingOptions, SKPaint) overload
• Added SKCanvas.DrawSurface(SKSurface, float, float, SKSamplingOptions, SKPaint) overload
• Added SKCanvas.DrawSurface(SKSurface, SKPoint, SKSamplingOptions, SKPaint) overload

Tests

• Added CanDrawSurfaceWithSamplingOptions test
• Added CanDrawSurfaceOnCanvasWithSamplingOptions test

Usage Example

var sampling = new SKSamplingOptions(SKFilterMode.Linear, SKMipmapMode.Linear);

// Using SKSurface.Draw
surface.Draw(canvas, x, y, sampling, paint);
surface.Draw(canvas, new SKPoint(x, y), sampling, paint);

// Using SKCanvas.DrawSurface
canvas.DrawSurface(surface, x, y, sampling, paint);
canvas.DrawSurface(surface, new SKPoint(x, y), sampling, paint);

[Copilot]

Pull request overview

This PR addresses a missing feature in SkiaSharp 3.x where SKSamplingOptions cannot be specified when drawing surfaces, forcing users to rely on legacy SKPaint fields that no longer work. The changes add new overloads to SKSurface.Draw and SKCanvas.DrawSurface that accept SKSamplingOptions as a parameter.

Changes:

• Added new C API function sk_surface_draw_with_sampling to support drawing surfaces with sampling options
• Added C# wrapper methods with SKSamplingOptions parameter to SKSurface and SKCanvas classes
• Added comprehensive test coverage for both new API methods

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
externals/skia	Updated skia submodule to include new C API function for surface drawing with sampling
binding/SkiaSharp/SkiaApi.generated.cs	Generated P/Invoke declarations for the new sk_surface_draw_with_sampling C API function
binding/SkiaSharp/SKSurface.cs	Added new Draw overload accepting SKSamplingOptions parameter
binding/SkiaSharp/SKCanvas.cs	Added new DrawSurface overloads accepting SKSamplingOptions parameter
tests/Tests/SkiaSharp/SKSurfaceTest.cs	Added tests verifying the new sampling options functionality works correctly

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.