cmake_minimum_required(VERSION 3.8)
project(GraphCutRANSAC LANGUAGES CXX)

# indicate if OPENMP should be enabled
option(CREATE_SAMPLE_PROJECT "Create the Sample Project" ON)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)


find_package(OpenCV)
if (OPENCV_FOUND)
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenCV_CXX_FLAGS}")
  	add_definitions(-DUSE_OPENMP)
	set(TRGT_LNK_LBS_ADDITIONAL OpenMP::OpenMP_CXX)
endif (OPENCV_FOUND)

FIND_PACKAGE(OpenMP)
if (OPENMP_FOUND)
# indicate if OPENMP should be enabled
option(USE_OPENMP "Use OPENMP" ON)
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_CXX_FLAGS}")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
endif (OPENMP_FOUND)

SET (CMAKE_BUILD_TYPE "RELEASE")

IF(CMAKE_COMPILER_IS_GNUCXX)
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-strict-aliasing")
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wextra -Wno-write-strings")
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated -ansi")
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -ftree-vectorize -funroll-loops")
ENDIF(CMAKE_COMPILER_IS_GNUCXX)

find_package(Eigen3 REQUIRED)
set(EIGEN_INCLUDE_DIRS ${EIGEN3_INCLUDE_DIR})


SET(SOURCE_DIR "src/pygcransac")
# Tell cmake that headers are in alse in source_dir
include_directories(${SOURCE_DIR}/include)


# Set header files for the library
file(GLOB_RECURSE HDRS_GCRANSAC
	"${SOURCE_DIR}/include/*.h"
) 

# Set source files to be added to the library
file(GLOB_RECURSE SRCS_GCRANSAC 
	"${SOURCE_DIR}/include/*.cpp"
)


# Generate python module
add_subdirectory(lib/pybind11)

pybind11_add_module(pygcransac ${SOURCE_DIR}/src/bindings.cpp ${SOURCE_DIR}/src/gcransac_python.cpp  ${HDRS_GCRANSAC} ${SRCS_GCRANSAC} )
target_link_libraries(pygcransac PRIVATE  ${OpenCV_LIBS} Eigen3::Eigen)


add_library(${PROJECT_NAME} STATIC ${HDRS_GCRANSAC} ${SRCS_GCRANSAC})

target_link_libraries(${PROJECT_NAME} 
	${OpenCV_LIBS}
)

target_link_libraries (${PROJECT_NAME}
	Eigen3::Eigen)

set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/lib)


	
# ==============================================================================
# Structure: Applications
# ==============================================================================
if (CREATE_SAMPLE_PROJECT)
	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/build)

	add_executable(SampleProject
		examples/cpp_example.cpp)
		
	target_link_libraries (SampleProject 
		Eigen3::Eigen)
		
	target_link_libraries(SampleProject 
		${OpenCV_LIBS}
		${PROJECT_NAME}
	)

	add_dependencies(SampleProject ${PROJECT_NAME})
endif (CREATE_SAMPLE_PROJECT)