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# Standalone OpenCV plugins build scripts
#
# Useful OpenCV common build variables:
# - CMAKE_BUILD_TYPE=Release/Debug
# - BUILD_WITH_DEBUG_INFO=ON
# - ENABLE_BUILD_HARDENING=ON
#
# Plugin configuration variables:
# - OPENCV_PLUGIN_DEPS - set of extra dependencies (modules), used for include dirs, target_link_libraries
# - OPENCV_PLUGIN_SUFFIX
# - OPENCV_PLUGIN_NAME
# - OPENCV_PLUGIN_OUTPUT_NAME_FULL (overrides both OPENCV_PLUGIN_NAME / OPENCV_PLUGIN_SUFFIX)
#
#=============================================
if(NOT OpenCV_SOURCE_DIR)
message(FATAL_ERROR "OpenCV_SOURCE_DIR must be set to build the plugin!")
endif()
if(NOT DEFINED CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE "Release")
endif()
message(STATUS "CMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
set(BUILD_SHARED_LIBS ON CACHE BOOL "")
if(NOT BUILD_SHARED_LIBS)
message(FATAL_ERROR "Static plugin build does not make sense")
endif()
# re-use OpenCV build scripts
include("${OpenCV_SOURCE_DIR}/cmake/OpenCVUtils.cmake")
include("${OpenCV_SOURCE_DIR}/cmake/OpenCVDetectCXXCompiler.cmake")
include("${OpenCV_SOURCE_DIR}/cmake/OpenCVCompilerOptions.cmake")
function(ocv_create_plugin module default_name dependency_target dependency_target_desc)
set(OPENCV_PLUGIN_NAME ${default_name} CACHE STRING "")
set(OPENCV_PLUGIN_DESTINATION "" CACHE PATH "")
project(${OPENCV_PLUGIN_NAME} LANGUAGES CXX)
if(NOT TARGET ${dependency_target})
message(FATAL_ERROR "${dependency_target_desc} was not found! (missing target ${dependency_target})")
endif()
set(modules_ROOT "${OpenCV_SOURCE_DIR}/modules")
set(module_ROOT "${modules_ROOT}/${module}")
foreach(src ${ARGN})
list(APPEND sources "${module_ROOT}/${src}")
endforeach()
add_library(${OPENCV_PLUGIN_NAME} MODULE
"${sources}"
${OPENCV_PLUGIN_EXTRA_SRC_FILES}
)
if(OPENCV_PLUGIN_DEPS)
foreach(d ${OPENCV_PLUGIN_DEPS})
list(APPEND OPENCV_PLUGIN_EXTRA_INCLUDES "${modules_ROOT}/${d}/include")
endforeach()
endif()
target_include_directories(${OPENCV_PLUGIN_NAME} PRIVATE
"${CMAKE_CURRENT_BINARY_DIR}"
"${module_ROOT}/src"
"${module_ROOT}/include"
${OPENCV_PLUGIN_EXTRA_INCLUDES}
)
target_compile_definitions(${OPENCV_PLUGIN_NAME} PRIVATE "BUILD_PLUGIN=1")
target_link_libraries(${OPENCV_PLUGIN_NAME} PRIVATE ${dependency_target})
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES
CXX_STANDARD 11
CXX_VISIBILITY_PRESET hidden
)
if(DEFINED OPENCV_PLUGIN_MODULE_PREFIX)
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES PREFIX "${OPENCV_PLUGIN_MODULE_PREFIX}")
endif()
if(WIN32 OR NOT APPLE)
set(OPENCV_PLUGIN_NO_LINK FALSE CACHE BOOL "")
else()
set(OPENCV_PLUGIN_NO_LINK TRUE CACHE BOOL "")
endif()
if(OPENCV_PLUGIN_NO_LINK)
if(APPLE)
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES LINK_FLAGS "-undefined dynamic_lookup")
endif()
else()
find_package(OpenCV REQUIRED ${module} ${OPENCV_PLUGIN_DEPS})
target_link_libraries(${OPENCV_PLUGIN_NAME} PRIVATE ${OpenCV_LIBRARIES})
endif()
if(NOT OpenCV_FOUND) # build against sources (Linux)
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/opencv2/opencv_modules.hpp" "#pragma once")
endif()
if(WIN32)
ocv_update(OPENCV_DEBUG_POSTFIX d)
endif()
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}")
if(DEFINED OPENCV_PLUGIN_SUFFIX)
# custom value
else()
if(WIN32)
ocv_update(OPENCV_PLUGIN_VERSION "${OpenCV_VERSION_MAJOR}${OpenCV_VERSION_MINOR}${OpenCV_VERSION_PATCH}")
if(CMAKE_CXX_SIZEOF_DATA_PTR EQUAL 8)
ocv_update(OPENCV_PLUGIN_ARCH "_64")
else()
ocv_update(OPENCV_PLUGIN_ARCH "")
endif()
else()
# empty
endif()
ocv_update(OPENCV_PLUGIN_SUFFIX "${OPENCV_PLUGIN_VERSION}${OPENCV_PLUGIN_ARCH}")
endif()
if(OPENCV_PLUGIN_DESTINATION)
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES LIBRARY_OUTPUT_DIRECTORY "${OPENCV_PLUGIN_DESTINATION}")
message(STATUS "Output destination: ${OPENCV_PLUGIN_DESTINATION}")
endif()
if(OPENCV_PLUGIN_OUTPUT_NAME_FULL)
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES OUTPUT_NAME "${OPENCV_PLUGIN_OUTPUT_NAME_FULL}")
elseif(OPENCV_PLUGIN_OUTPUT_NAME)
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES OUTPUT_NAME "${OPENCV_PLUGIN_OUTPUT_NAME}${OPENCV_PLUGIN_SUFFIX}")
else()
set_target_properties(${OPENCV_PLUGIN_NAME} PROPERTIES OUTPUT_NAME "${OPENCV_PLUGIN_NAME}${OPENCV_PLUGIN_SUFFIX}")
endif()
install(TARGETS ${OPENCV_PLUGIN_NAME} LIBRARY DESTINATION . COMPONENT plugins)
message(STATUS "Library name: ${OPENCV_PLUGIN_NAME}")
endfunction()
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