When we initially introduced our DirectX mapping layers, our goal was to enable applications written in other graphics APIs, including DX9, DX11 and OpenGL, to run on DirectX12 systems if a native driver is not available. We’ve written about the OpenGL mapping layer previously and how we developed it by contributing OpenGL on DX12 (GLon12) to the Mesa 3D open-source project,


원문출처 : https://devblogs.microsoft.com/directx/opengl-on-dx12-enables-steel-assault-to-launch-on-xbox