set(name "gpu")

set(the_target "opencv_${name}")
project(${the_target})


set(DEPS "opencv_core" "opencv_imgproc" "opencv_objdetect" "opencv_features2d" "opencv_flann") #"opencv_features2d" "opencv_flann" "opencv_objdetect" - only headers needed 
set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} opencv_gpu)

add_definitions(-DCVAPI_EXPORTS)

include_directories("${CMAKE_CURRENT_SOURCE_DIR}/include"                    
					"${CMAKE_CURRENT_SOURCE_DIR}/src/cuda"                    
					"${CMAKE_CURRENT_SOURCE_DIR}/src"
					"${CMAKE_CURRENT_BINARY_DIR}")

foreach(d ${DEPS})
	if(${d} MATCHES "opencv_")
		string(REPLACE "opencv_" "${CMAKE_CURRENT_SOURCE_DIR}/../" d_dir ${d})
		include_directories("${d_dir}/include")
	endif()
endforeach()

file(GLOB lib_srcs "src/*.cpp")
file(GLOB lib_int_hdrs "src/*.h*")
file(GLOB lib_cuda "src/cuda/*.cu*")
file(GLOB lib_cuda_hdrs "src/cuda/*.h*")
source_group("Src\\Host" FILES ${lib_srcs} ${lib_int_hdrs})
source_group("Src\\Cuda" FILES ${lib_cuda} ${lib_cuda_hdrs})

file(GLOB lib_hdrs "include/opencv2/${name}/*.h*")
source_group("Include" FILES ${lib_hdrs})

#file(GLOB lib_device_hdrs "include/opencv2/${name}/device/*.h*")
file(GLOB lib_device_hdrs "src/opencv2/gpu/device/*.h*")
source_group("Device" FILES ${lib_device_hdrs})

if (HAVE_CUDA)		
	get_filename_component(_path_to_findnpp "${CMAKE_CURRENT_LIST_FILE}" PATH)
	set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${_path_to_findnpp})	
	find_package(NPP 3.2.16 REQUIRED)
	message(STATUS "NPP detected: " ${NPP_VERSION})
       
	include_directories(${CUDA_INCLUDE_DIRS} ${CUDA_NPP_INCLUDES})	
	
	if (UNIX OR APPLE)
		set (CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS}  "-Xcompiler;-fPIC;")
		#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" "-fPIC")
	endif()

	#set (CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-keep")
	#set (CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} "-Xcompiler;/EHsc-;")

	string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
	string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
	string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")

	if(MSVC)
		#string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
		#string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
		#string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4211 /wd4201 /wd4100 /wd4505 /wd4408")

		string(REPLACE "/EHsc-" "/EHs" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
		string(REPLACE "/EHsc-" "/EHs" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
		string(REPLACE "/EHsc-" "/EHs" CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}")
		string(REPLACE "/EHsc-" "/EHs" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
		string(REPLACE "/EHsc-" "/EHs" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
		string(REPLACE "/EHsc-" "/EHs" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
	endif()

	CUDA_COMPILE(cuda_objs ${lib_cuda})
	#CUDA_BUILD_CLEAN_TARGET()
endif()


add_library(${the_target} ${lib_srcs} ${lib_hdrs} ${lib_int_hdrs} ${lib_cuda} ${lib_cuda_hdrs} ${lib_device_hdrs} ${cuda_objs})

IF (HAVE_CUDA)
    include(FindNPP_staging.cmake)    
    include_directories(${NPPST_INC})       
    target_link_libraries(${the_target} ${NPPST_LIB})
endif()

if(PCHSupport_FOUND)
	set(pch_header ${CMAKE_CURRENT_SOURCE_DIR}/src/precomp.hpp)
	if(${CMAKE_GENERATOR} MATCHES "Visual*" OR ${CMAKE_GENERATOR} MATCHES "Xcode*")
		if(${CMAKE_GENERATOR} MATCHES "Visual*")
			set(${the_target}_pch "src/precomp.cpp")
		endif()
		add_native_precompiled_header(${the_target} ${pch_header})
	elseif(CMAKE_COMPILER_IS_GNUCXX AND ${CMAKE_GENERATOR} MATCHES ".*Makefiles")
		add_precompiled_header(${the_target} ${pch_header})
	endif()
endif()

# For dynamic link numbering convenions
set_target_properties(${the_target} PROPERTIES
	VERSION ${OPENCV_VERSION}
	SOVERSION ${OPENCV_SOVERSION}
	OUTPUT_NAME "${the_target}${OPENCV_DLLVERSION}"
	)

# Additional target properties
set_target_properties(${the_target} PROPERTIES
	DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}"
	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib/"
	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/"
	INSTALL_NAME_DIR "${CMAKE_INSTALL_PREFIX}/lib"
	)

# Add the required libraries for linking:
target_link_libraries(${the_target} ${OPENCV_LINKER_LIBS} ${IPP_LIBS} ${DEPS} )

if (HAVE_CUDA)
	target_link_libraries(${the_target} ${CUDA_LIBRARIES} ${CUDA_NPP_LIBRARIES})
    CUDA_ADD_CUFFT_TO_TARGET(${the_target})
endif()

if(MSVC)
	if(CMAKE_CROSSCOMPILING)
		set_target_properties(${the_target} PROPERTIES
			LINK_FLAGS "/NODEFAULTLIB:secchk"
			)
	endif()
        set_target_properties(${the_target} PROPERTIES
            LINK_FLAGS "/NODEFAULTLIB:libc"
            )
endif()

# Dependencies of this target:
add_dependencies(${the_target} ${DEPS})

install(TARGETS ${the_target}
	RUNTIME DESTINATION bin COMPONENT main
	LIBRARY DESTINATION lib COMPONENT main
	ARCHIVE DESTINATION lib COMPONENT main)

install(FILES ${lib_hdrs}
	DESTINATION include/opencv2/${name}
	COMPONENT main)

#install(FILES ${lib_device_hdrs}
#	DESTINATION include/opencv2/${name}/device
#	COMPONENT main)