# CMake powered build system for OpenMVS

########################################################################
#
# Project-wide settings
CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)

# Name of the project.
#
# CMake files in this project can refer to the root source directory
# as ${OpenMVS_SOURCE_DIR} and to the root binary directory as
# ${OpenMVS_BINARY_DIR}.
PROJECT(OpenMVS)

set(OpenMVS_MAJOR_VERSION 1)
set(OpenMVS_MINOR_VERSION 0)
set(OpenMVS_PATCH_VERSION 1)
set(OpenMVS_VERSION ${OpenMVS_MAJOR_VERSION}.${OpenMVS_MINOR_VERSION}.${OpenMVS_PATCH_VERSION})

# Find dependencies:
SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/build/Modules)

# fix CMake IntDir variable
if(MSVC AND "${MSVC_VERSION}" STRGREATER "1500")
	SET(CMAKE_CFG_INTDIR "$(Platform)/$(Configuration)")
endif()
SET(COTIRE_INTDIR "cotire")

# Define helper functions and macros.
cmake_policy(SET CMP0011 OLD)
INCLUDE(build/Utils.cmake)
if(ENABLE_PRECOMPILED_HEADERS)
	INCLUDE(build/Cotire.cmake)
endif()

# Init session with macros defined in Utils.cmake
GetOperatingSystemArchitectureBitness(SYSTEM)
ComposePackageLibSuffix()
ConfigCompilerAndLinker()
ConfigLibrary()

# List configuration options
SET(OpenMVS_USE_NONFREE ON CACHE BOOL "Build non-free (patented) functionality")
SET(OpenMVS_USE_CERES OFF CACHE BOOL "Enable CERES optimization library")
SET(OpenMVS_USE_FAST_FLOAT2INT ON CACHE BOOL "Use an optimized code to convert real numbers to int")
SET(OpenMVS_USE_FAST_INVSQRT OFF CACHE BOOL "Use an optimized code to compute the inverse square root (slower in fact on modern compilers)")
SET(OpenMVS_USE_FAST_CBRT ON CACHE BOOL "Use an optimized code to compute the cubic root")
SET(OpenMVS_USE_SSE ON CACHE BOOL "Enable SSE optimizations")
SET(OpenMVS_USE_OPENMP ON CACHE BOOL "Enable OpenMP library")
SET(OpenMVS_USE_OPENGL ON CACHE BOOL "Enable OpenGL library")
SET(OpenMVS_USE_CUDA ON CACHE BOOL "Enable CUDA library")
SET(OpenMVS_USE_BREAKPAD ON CACHE BOOL "Enable BreakPad library")
SET(OpenMVS_CONFIG_INCLUDE_DIR "${CMAKE_BINARY_DIR}/" CACHE PATH "Where to create the build/platform specific header")

INCLUDE_DIRECTORIES("${OpenMVS_SOURCE_DIR}")

# Find required packages
SET(OpenMVS_EXTRA_LIBS "")
if(OpenMVS_USE_OPENMP)
	SET(OpenMP_LIBS "")
	FIND_PACKAGE(OpenMP)
	if(OPENMP_FOUND)
		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
		ADD_DEFINITIONS(-D_USE_OPENMP)
		SET(_USE_OPENMP TRUE)
		#cmake only check for separate OpenMP library on AppleClang 7+
		#https://github.com/Kitware/CMake/blob/42212f7539040139ecec092547b7d58ef12a4d72/Modules/FindOpenMP.cmake#L252
		if (CMAKE_CXX_COMPILER_ID MATCHES "AppleClang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "7.0")
			SET(OpenMP_LIBS ${OpenMP_libomp_LIBRARY})
			LIST(APPEND OpenMVS_EXTRA_LIBS ${OpenMP_LIBS})
		endif()
	else()
		message("-- Can't find OpenMP. Continuing without it.")
	endif()
endif()

if(OpenMVS_USE_OPENGL)
	FIND_PACKAGE(OpenGL)
	if(OPENGL_FOUND)
		INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIR})
		ADD_DEFINITIONS(${OpenGL_DEFINITIONS} -D_USE_OPENGL)
		SET(_USE_OPENGL TRUE)
	else()
		MESSAGE("-- Can't find OpenGL. Continuing without it.")
	endif()
endif()

if(OpenMVS_USE_CUDA)
	FIND_PACKAGE(CUDA)
	if(CUDA_FOUND)
		INCLUDE_DIRECTORIES(${CUDA_INCLUDE_DIRS})
		ADD_DEFINITIONS(-D_USE_CUDA)
		SET(_USE_CUDA TRUE)
	else()
		SET(CUDA_CUDA_LIBRARY "")
		MESSAGE("-- Can't find CUDA. Continuing without it.")
	endif()
else()
	SET(CUDA_CUDA_LIBRARY "")
endif()

if(OpenMVS_USE_BREAKPAD)
	FIND_PACKAGE(BREAKPAD)
	if(BREAKPAD_FOUND)
		INCLUDE_DIRECTORIES(${BREAKPAD_INCLUDE_DIRS})
		ADD_DEFINITIONS(${BREAKPAD_DEFINITIONS} -D_USE_BREAKPAD)
		SET(_USE_BREAKPAD TRUE)
		LIST(APPEND OpenMVS_EXTRA_LIBS ${BREAKPAD_LIBS})
	else()
		MESSAGE("-- Can't find BreakPad. Continuing without it.")
	endif()
endif()

FIND_PACKAGE(Boost ${SYSTEM_PACKAGE_REQUIRED} COMPONENTS iostreams program_options system serialization)
if(Boost_FOUND)
	INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
	ADD_DEFINITIONS(${Boost_DEFINITIONS} -D_USE_BOOST)
	LINK_DIRECTORIES(${Boost_LIBRARY_DIRS})
	SET(_USE_BOOST TRUE)
endif()

FIND_PACKAGE(Eigen ${SYSTEM_PACKAGE_REQUIRED})
if(EIGEN_FOUND)
	INCLUDE_DIRECTORIES(${EIGEN_INCLUDE_DIRS})
	ADD_DEFINITIONS(${EIGEN_DEFINITIONS} -D_USE_EIGEN)
	SET(_USE_EIGEN TRUE)
endif()

FIND_PACKAGE(OpenCV ${SYSTEM_PACKAGE_REQUIRED})
if(OpenCV_FOUND)
	INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})
	ADD_DEFINITIONS(${OpenCV_DEFINITIONS})
	SET(_USE_OPENCV TRUE)
	MESSAGE(STATUS "OpenCV ${OpenCV_VERSION} found (include: ${OpenCV_INCLUDE_DIRS})")
else()
	MESSAGE("-- Can't find OpenCV. Please specify OpenCV directory using OpenCV_DIR variable")
endif()

# Set defines
SET(OpenMVS_DEFINITIONS "")
if(OpenMVS_USE_NONFREE)
	LIST(APPEND OpenMVS_DEFINITIONS -D_USE_NONFREE)
	SET(_USE_NONFREE TRUE)
endif()
if(OpenMVS_USE_FAST_FLOAT2INT)
	LIST(APPEND OpenMVS_DEFINITIONS -D_USE_FAST_FLOAT2INT)
	SET(_USE_FAST_FLOAT2INT TRUE)
endif()
if(OpenMVS_USE_FAST_INVSQRT)
	LIST(APPEND OpenMVS_DEFINITIONS -D_USE_FAST_INVSQRT)
	SET(_USE_FAST_INVSQRT TRUE)
endif()
if(OpenMVS_USE_FAST_CBRT)
	LIST(APPEND OpenMVS_DEFINITIONS -D_USE_FAST_CBRT)
	SET(_USE_FAST_CBRT TRUE)
endif()
if(OpenMVS_USE_SSE)
	LIST(APPEND OpenMVS_DEFINITIONS -D_USE_SSE)
	SET(_USE_SSE TRUE)
endif()
ADD_DEFINITIONS(${OpenMVS_DEFINITIONS})

# Add modules
ADD_SUBDIRECTORY(libs)
ADD_SUBDIRECTORY(apps)
ADD_SUBDIRECTORY(docs)

if(OpenMVS_USE_CERES)
	SET(_USE_CERES TRUE)
endif()

# Set configuration file
CONFIGURE_FILE("${OpenMVS_SOURCE_DIR}/build/Templates/ConfigLocal.h.in" "${OpenMVS_CONFIG_INCLUDE_DIR}/ConfigLocal.h")
INSTALL(FILES "${OpenMVS_CONFIG_INCLUDE_DIR}/ConfigLocal.h" DESTINATION "${INSTALL_INCLUDE_DIR}")
INCLUDE_DIRECTORIES(${OpenMVS_CONFIG_INCLUDE_DIR})

# Add all targets to the build-tree export set
export(TARGETS Common IO Math MVS FILE "${PROJECT_BINARY_DIR}/OpenMVSTargets.cmake")

# Export the package for use from the build-tree
# (this registers the build-tree with a global CMake-registry)
export(PACKAGE OpenMVS)
 
# Create the OpenMVSConfig.cmake and OpenMVSConfigVersion files
file(RELATIVE_PATH REL_INCLUDE_DIR "${INSTALL_CMAKE_DIR}" "${INSTALL_INCLUDE_DIR}")
# ... for the build tree
set(CONF_INCLUDE_DIRS "${PROJECT_SOURCE_DIR}" "${PROJECT_BINARY_DIR}")
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/build/OpenMVSConfig.cmake.in" "${PROJECT_BINARY_DIR}/OpenMVSConfig.cmake" @ONLY)
# ... for the install tree
set(CONF_INCLUDE_DIRS "${INSTALL_CMAKE_DIR}/${REL_INCLUDE_DIR}")
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/build/OpenMVSConfig.cmake.in" "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/OpenMVSConfig.cmake" @ONLY)
# ... for both
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/build/OpenMVSConfigVersion.cmake.in" "${PROJECT_BINARY_DIR}/OpenMVSConfigVersion.cmake" @ONLY)
 
# Install the OpenMVSConfig.cmake and OpenMVSConfigVersion.cmake
install(FILES
	"${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/OpenMVSConfig.cmake"
	"${PROJECT_BINARY_DIR}/OpenMVSConfigVersion.cmake"
	DESTINATION "${INSTALL_CMAKE_DIR}" COMPONENT dev)

# Install the export set for use with the install-tree
install(EXPORT OpenMVSTargets DESTINATION "${INSTALL_CMAKE_DIR}" COMPONENT dev)

# uninstall target
configure_file(
	"${CMAKE_CURRENT_SOURCE_DIR}/build/cmake_uninstall.cmake.in"
	"${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
	IMMEDIATE @ONLY)

add_custom_target(uninstall
	COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)