deepin-ocr/3rdparty/opencv-4.5.4/cmake/OpenCVDetectDirectX.cmake

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CMake
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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)
if(HAVE_OPENCL AND WITH_OPENCL_D3D11_NV AND EXISTS "${OPENCL_INCLUDE_DIR}/CL/cl_d3d11_ext.h")
set(HAVE_OPENCL_D3D11_NV ON)
endif()
endif()