Oh wow, good to know d3d8 xbox code is there. Anyone know if d3d code has been leaked in other releases?
Microsoft made some interesting d3dx code open source on their github. Though a lot of stuff like PRT baking is missing:
https://github.com/Microsoft/DirectXMesh
https://github.com/microsoft/UVAtlas
https://github.com/microsoft/DirectXMath
https://github.com/microsoft/DirectXShaderCompiler
https://github.com/microsoft/DirectXTex