Under windows, WebGL makes use of DirectX Runtime or OpenGL runtime?

Question

Under windows, there are two main 3D libraries. I am wondering WebGL use which? is it configurable? Is it configurable per browser?

Answer 1

Google Chrome and Firefox will by default make use of ANGLE wrapper to convert OpenGL API calls to Direct3D 9.0 (to achieve better compatibility with most hardware). Users can change this default behavior but it seems to be very inconvenient to override this (currently it's not possible to change this settings programatically).

All other major browsers (on windows) will use OpenGL.