if(WIN32)try_compile(__VALID_DIRECTX"${OpenCV_BINARY_DIR}""${OpenCV_SOURCE_DIR}/cmake/checks/directx.cpp" OUTPUT_VARIABLE TRY_OUT)if(NOT __VALID_DIRECTX)return()endif()try_compile(__VALID_DIRECTX_NV12"${OpenCV_BINARY_DIR}""${OpenCV_SOURCE_DIR}/cmake/checks/directx.cpp" COMPILE_DEFINITIONS "-DCHECK_NV12" OUTPUT_VARIABLE TRY_OUT)if(__VALID_DIRECTX_NV12)set(HAVE_DIRECTX_NV12 ON)else()message(STATUS "No support for DirectX NV12 format (install Windows 8 SDK)")endif()set(HAVE_DIRECTX ON)set(HAVE_D3D11 ON)set(HAVE_D3D10 ON)set(HAVE_D3D9 ON)endif()