# Find the win10 SDK path.
get_filename_component(WIN10_SDK_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\Microsoft\\Microsoft SDKs\\Windows\\v10.0;InstallationFolder]" ABSOLUTE CACHE)
get_filename_component(TEMP_WIN10_SDK_VERSION "[HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\Microsoft\\Microsoft SDKs\\Windows\\v10.0;ProductVersion]" ABSOLUTE CACHE)

get_filename_component(WIN10_SDK_VERSION ${TEMP_WIN10_SDK_VERSION} NAME)

# WIN10_SDK_PATH will be something like C:\Program Files (x86)\Windows Kits\10

# WIN10_SDK_VERSION will be something like 10.0.14393 or 10.0.14393.0; we need the
# one that matches the directory name.
if (IS_DIRECTORY "${WIN10_SDK_PATH}/Include/${WIN10_SDK_VERSION}.0")
  set(WIN10_SDK_VERSION "${WIN10_SDK_VERSION}.0")
endif (IS_DIRECTORY "${WIN10_SDK_PATH}/Include/${WIN10_SDK_VERSION}.0")


# Find the d3d12 and dxgi include path, it will typically look something like this.
# C:\Program Files (x86)\Windows Kits\10\Include\10.0.10586.0\um\d3d12.h
# C:\Program Files (x86)\Windows Kits\10\Include\10.0.10586.0\shared\dxgi1_4.h
find_path(D3D12_INCLUDE_DIR    # Set variable D3D12_INCLUDE_DIR
          d3d12.h                # Find a path with d3d12.h
          HINTS "${WIN10_SDK_PATH}/Include/${WIN10_SDK_VERSION}/um"
          DOC "path to WIN10 SDK header files"
          HINTS
          )

find_path(DXGI_INCLUDE_DIR    # Set variable DXGI_INCLUDE_DIR
          dxgi1_4.h           # Find a path with dxgi1_4.h
          HINTS "${WIN10_SDK_PATH}/Include/${WIN10_SDK_VERSION}/shared"
          DOC "path to WIN10 SDK header files"
          HINTS
          )

if ("${DXC_BUILD_ARCH}" STREQUAL "x64" )
  find_library(D3D12_LIBRARY NAMES d3d12.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/x64 )
elseif (CMAKE_GENERATOR MATCHES "Visual Studio.*ARM" )
  find_library(D3D12_LIBRARY NAMES d3d12.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/arm )
elseif (CMAKE_GENERATOR MATCHES "Visual Studio.*ARM64" )
  find_library(D3D12_LIBRARY NAMES d3d12.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/arm64 )
elseif ("${DXC_BUILD_ARCH}" STREQUAL "Win32" )
  find_library(D3D12_LIBRARY NAMES d3d12.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/x86 )
endif ("${DXC_BUILD_ARCH}" STREQUAL "x64" )

if ("${DXC_BUILD_ARCH}" STREQUAL "x64" )
  find_library(DXGI_LIBRARY NAMES dxgi.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/x64 )
elseif (CMAKE_GENERATOR MATCHES "Visual Studio.*ARM" )
  find_library(DXGI_LIBRARY NAMES dxgi.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/arm )
elseif (CMAKE_GENERATOR MATCHES "Visual Studio.*ARM64" )
  find_library(DXGI_LIBRARY NAMES dxgi.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/arm64 )
elseif ("${DXC_BUILD_ARCH}" STREQUAL "Win32" )
  find_library(DXGI_LIBRARY NAMES dxgi.lib
               HINTS ${WIN10_SDK_PATH}/Lib/${WIN10_SDK_VERSION}/um/x86 )
endif ("${DXC_BUILD_ARCH}" STREQUAL "x64" )

set(D3D12_LIBRARIES ${D3D12_LIBRARY} ${DXGI_LIBRARY})
set(D3D12_INCLUDE_DIRS ${D3D12_INCLUDE_DIR} ${DXGI_INCLUDE_DIR})


include(FindPackageHandleStandardArgs)
# handle the QUIETLY and REQUIRED arguments and set D3D12_FOUND to TRUE
# if all listed variables are TRUE
find_package_handle_standard_args(D3D12  DEFAULT_MSG
                                  D3D12_INCLUDE_DIRS D3D12_LIBRARIES)

mark_as_advanced(D3D12_INCLUDE_DIRS D3D12_LIBRARIES)