CMakeLists.txt

cmake_minimum_required(VERSION 3.6)

project(
  SimpleCam
  DESCRIPTION "A small and documented example application for libcamera"
  LANGUAGES CXX)

# Generate compile_commands.json
#set(CMAKE_EXPORT_COMPILE_COMMANDS
#    ON
#    CACHE INTERNAL "")

set(CMAKE_CXX_STANDARD 17)

set(CMAKE_CXX_FLAGS
    "-Wall -Winvalid-pch -Wnon-virtual-dtor -Wextra -Werror -Wno-unused-parameter"
)

find_package(PkgConfig)

pkg_check_modules(LIBCAMERA REQUIRED IMPORTED_TARGET libcamera)
message(STATUS "libcamera library found:")
message(STATUS "    version: ${LIBCAMERA_VERSION}")
message(STATUS "    libraries: ${LIBCAMERA_LINK_LIBRARIES}")
message(STATUS "    include path: ${LIBCAMERA_INCLUDE_DIRS}")

# libevent is used specifically by simple-cam as its event loop. Applications
# may use a different event handling implementation.
pkg_check_modules(LIBEVENT REQUIRED IMPORTED_TARGET libevent_pthreads)
message(STATUS "libevent_pthreads library found:")
message(STATUS "    version: ${LIBEVENT_VERSION}")
message(STATUS "    libraries: ${LIBEVENT_LINK_LIBRARIES}")
message(STATUS "    include path: ${LIBEVENT_INCLUDE_DIRS}")

find_package(OpenCV REQUIRED COMPONENTS core imgproc highgui)
if(OpenCV_FOUND)
  message(STATUS "OpenCV library found: ${OpenCV_FOUND}")
  message(STATUS "    version: ${OpenCV_VERSION}")
  message(STATUS "    libraries: ${OpenCV_LIBS}")
  message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")
else()
  message(FATAL_ERROR "OpenCV not found")
endif()

include_directories(${CMAKE_SOURCE_DIR} ${LIBCAMERA_INCLUDE_DIRS}
                    ${LIBEVENT_INCLUDE_DIRS} ${OpenCV_INCLUDE_DIRS})

add_executable(simple-cam simple-cam.cpp event_loop.cpp image.cpp)

target_link_libraries(simple-cam PkgConfig::LIBEVENT)
target_link_libraries(simple-cam PkgConfig::LIBCAMERA)
target_link_libraries(simple-cam ${OpenCV_LIBS})