Skia VS Veldrid

Actually, that's not entirely accurate. The lottie-web library itself doesn't support rendering to WebGL. However, there is a package called canvaskit-wasm that wraps Skia (a graphics engine) with WebAssembly (wasm). This package includes a module called skottie which supports rendering animations into a WebGL surface. However, there is a drawback with this approach: using wasm requires loading a relatively large package, and it's uncertain whether all features are supported correctly, as the official compatibility table that tracks lottie support on different platforms does not include skottie.

Skia is pretty great if you can get it running.

The imgs are mainly used by Tencent QQ and Baidu Tieba users. QQ and Tieba compress imgs by default, so the popular imgs (in China we call them "屌图" or "表情包") would be compressed million of times during the spreading, causing the super low quality. These APPs on Android are using Skia for image processing, which suffering from a legendary bug: result would be more green. The bug was fixed in 2016: https://github.com/google/skia/commit/c7d01d3e1d3621907c27b283fb7f8b6e177c629d

There’s also Skia by Google. Used by Android and Google Chrome.

I'd recommend Veldrid

So, for example, Veldrid, a low cross-platform graphics API-agnostic rendering and compute library for .NET, has its own bindings to provide different graphics backends. How were those created? Is it a completely manual process? are tools available? How are those maintained?

https://github.com/mellinoe/veldrid and https://github.com/dotnet/Silk.NET are nice wrappers around several graphic apis

Check out Veldrid.

Veldrid is a lower level engine that abstracts away a bunch of backends for you. Youll have to build your own pieces on top.

Also noteworthy: Veldrid

in addition to what everyone has said already, take a look at https://github.com/mellinoe/veldrid

Veldrid for graphics although I think SILK.net would also work well.

If you’re interested in C#, You could look into Veldrid. It is 3D however, so im not sure how easy it is to do 2D with it. ImGui.NET is a set of .NET bindings for Dear ImGui, which is one of the best immediate mode gui librarys out there imo. It has a canvas feature which allows you to draw 2D shapes via the gui renderer. Also, the creator of Veldrid and ImGui.NET has an example project for ImGui.NET using veldrid..

Veldrid attempts to wrap several graphics api, directx11, metal, opengl, and vulkan. You would have to write most things from scratch but this lib will work cross platform. Probably not consoles though.