Johnwikix.ScottPlot.Avalonia 5.1.60.3

ScottPlot for .NET with full-GPU Direct3D 12 rendering (Johnwikix fork)

A maintained fork of ScottPlot 5 — the free, open-source plotting library for .NET — extended with a Direct3D 12 hardware rendering backend. The plotting API is unchanged from ScottPlot 5.1.60; figures that are CPU-rasterization-bound upstream render many times faster because every frame is produced entirely on the GPU (Skia GPU context, native 4x MSAA, explicit GPU resolve, no raster-surface fallback).

This fork is published under the Johnwikix.* package IDs, so it installs side by side with the official ScottPlot.* packages without conflicts.

Packages

Install

# Full-GPU WPF control (renders the whole figure on the GPU)
dotnet add package Johnwikix.ScottPlot.D3D12

# Full-GPU Avalonia backend (Windows launcher; shared views stay on Johnwikix.ScottPlot.Avalonia)
dotnet add package Johnwikix.ScottPlot.Avalonia.D3D12

# Core library only (software rendering, as upstream)
dotnet add package Johnwikix.ScottPlot

Usage

Each GPU control is a drop-in replacement for its platform's stock ScottPlot control — same Plot API, but every frame is rendered on the GPU.

WPF

<Window ...
        xmlns:spd="clr-namespace:ScottPlot.D3D12;assembly=ScottPlot.D3D12">
    <spd:WpfPlotD3D12 />
</Window>

WinUI 3 and UWP

<Page ...
      xmlns:spd="using:ScottPlot.D3D12.WinUI"> 
    <spd:WinUIPlotD3D12 /> 
</Page>

Avalonia

Shared views reference only Johnwikix.ScottPlot.Avalonia and stay cross-platform:

<UserControl ...
             xmlns:sp="clr-namespace:ScottPlot.Avalonia;assembly=ScottPlot.Avalonia">
    <sp:AvaPlot x:Name="PlotControl" />
</UserControl>

The Windows launcher (on net8.0-windows/net10.0-windows) additionally references Johnwikix.ScottPlot.Avalonia.D3D12, registers the backend at startup, and opts in per control:

using ScottPlot.Avalonia;
using ScottPlot.Avalonia.D3D12;

AppBuilder.Configure<App>().UsePlatformDetect().UseScottPlotD3D12();
PlotControl.RenderBackend = AvaPlotRenderBackend.Direct3D12; // default remains PlatformSkia
await PlotControl.RefreshAsync();

On Linux/macOS the control keeps Avalonia's Skia path; requesting Direct3D12 on another OS reports PlatformNotSupportedException instead of silently falling back. From there the standard ScottPlot API applies to all backends:

PlotControl.Plot.Add.Signal(Generate.Sin(51));

Packages in the Johnwikix.* family depend only on each other — no dependency on the official ScottPlot.* package IDs.

Source code

https://github.com/Johnwikix/ScottPlot (branch d3d12)

Quality assurance

Every release is validated by an end-to-end suite that renders hundreds of scenes across WPF, WinUI 3, and UWP real windows and compares them against the software-Skia baseline (appearance and performance), real-window Avalonia backend validation (DPI scaling, resize, Skia/D3D12 switching, failure recovery), plus hardware D3D12 unit tests.

License

MIT — inherited from upstream ScottPlot.