This PR explores feasibility of cutting the dependency on System.Drawing.Common in favor of a rendering system using Microsoft.Maui.Graphics (#1036). Depending on what is discovered here, code here may evolve into the next major version of ScottPlot (version 5).

Goals of this PR

• Support back to .NET Standard 2.0 and .NET Framework 4.6.2
• no System.Drawing anywhere in the project
• nullable support throughout the code base C# 8 nullable support #691
• hardware-accelerated rendering in controls using SkiaSharp and OpenGL
• stateless rendering system to improve support for multi-threading and testing
  • size will never be stored - it will be passed-in and the layout will be recalculated on each render
  • mouse positions or state should not be stored - mouse actions (e.g., click/drag) will be built by controls and passed in

Major Limitations

These limitations are because Maui.Graphics is not fully mature yet, but:

• There is no Microsoft.Maui.Graphics.ICanvas.MeasureString()
• Microsoft.Maui.Graphics.ICanvas.DrawString() does not support custom fonts

Resources

• https://maui.graphics