angle VS OpenGL-on-DXGI

It's using MoltenVK on Mac for Vulkan compatibility, and ANGLE for OpenGL compatibility on Windows and Linux. Makes you wonder what it's actually doing itself.

Can't they use https://github.com/google/angle?

BTW. For the last 15 years, all web browsers on Windows do WebGL on top of DirectX (using the Angle library https://github.com/google/angle).

You can still use OpenGL. Just not the vendor provided drivers. They are indeed horrible. There are libraries like:

* ANGLE ( https://github.com/google/angle ) - An OpenGL ES implementation with Direct3D 9, Direct3D 11, Desktop GL, GL ES, Vulkan and Metal backends. This is what we used to use for shipping our Qt 3D application, that used a bunch of OpenGL Shaders. We used to get bug reports about various shaders not working properly on various hardware. After switching to this, all those bug reports vanished.

* Zinc ( https://www.supergoodcode.com/do-not/ ) - A more recent, OpenGL implementation on top of Vulkan. I haven't used this one yet. But they are making a lot of progress and it is almost as performant as vendor provided OpenGL Drivers these days. So if I ever have to ship a desktop app, needing opengl, I'd strongly consider using this.

Another option if perf isn't a big concern is to try using Google's angle OpenGL ES 3.0 implementation, there's backends for it to be supported on Vulkan, Direct3D 11, and (work in progress) Metal. Disclosure, haven't tried it myself, just looking at their feature descriptions: https://github.com/google/angle

I don't believe Chrome uses OpenGL directly- any OpenGL usage it does have (e.g. for WebGL) is actually going through ANGLE which translates it all to D3D on Windows.

RTFM, have you read their instruction

On Windows, another approach is to use OpenGL with DXGI. There is a barely documented extension called WGL_NV_DX_interop / WGL_NV_DX_interop2 to allow direct Direct3D and OpenGL integration. It says 'NV', but it's supported on multiple graphics vendors. Someone online has put up a GitHub repo OpenGL-on-DXGI that shows the basics. It's hell to use - you literally use two graphics APIs at once and sign every shared object in triplicate - but there is a happy path where it works. You could then render your output in OpenGL to a texture and display that texture in D3D, using the DXGI control to min frame latency.