[directxsdk] Add new Port

[adrido]

This allows the DirectX SDK Jun10 to be "installed" with vcpkg.

• What does your PR fix? Fixes Adding Directx SDK to vcpkg #2042

• Which triplets are supported/not supported?
  supported: x86-windows, x64-windows

• Have you updated the CI baseline?
  Yes

• Does your PR follow the maintainer guide?
  Yes

[strega-nil]

@adrido Could we rename this port directx-sdk? I think it reads better.

Otherwise, this looks fantastic. @ras0219, any thoughts?

[adrido]

I have chosen directxsdk to follow the naming scheme of the other directx ports:

PS E:\vcpkg> .\vcpkg.exe search directx
directxmesh          jul2020          DirectXMesh geometry processing library
directxsdk           jun10            DirectX SDK
directxtex           jul2020          DirectXTex texture processing library
directxtk            jul2020          A collection of helper classes for writing DirectX 11.x code in C++.
directxtk12          jul2020          A collection of helper classes for writing DirectX 12 code in C++.
dx                   1.0.1-1          A modern C++ library for DirectX programming
...

But yes, directx-sdk is better readable.

[strega-nil]

hmm, I think you're right then. We may change it later once alias ports are a thing.

[fromasmtodisasm]

Hello, how are header files supposed to be used? Prefixed with directxsdk/ ?

like this?
#include <directxsdk/d3dx11.h>

if yes, then some old code will have to be rewritten, is there a smart way to specify the directxsdk folder as the search path?

[computerquip]

For those curious on how to use this properly, you can use find_path and find_library.

find_path(D3D9_INCLUDE_DIR d3dx9.h PATH_SUFFIXES directxsdk REQUIRED)
find_library(D3D9_LIBRARY d3d9 REQUIRED)

This sets <package>/include/directxsdk to D3D9_INCLUDE_DIR (i.e. you do not need to prefix your include with directxsdk) and d3d9.lib to D3D9_LIBRARY.