CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

project(cesium-native
    VERSION 0.1.0
    LANGUAGES CXX C
)

option(PRIVATE_CESIUM_SQLITE "ON to rename SQLite symbols to cesium_sqlite3_* so they won't conflict with other SQLite implemenentations" OFF)
option(CESIUM_TRACING_ENABLED "Whether to enable the Cesium performance tracing framework (CESIUM_TRACE_* macros)." OFF)
option(CESIUM_COVERAGE_ENABLED "Whether to enable code coverage" OFF)
option(CESIUM_TESTS_ENABLED "Whether to enable tests" ON)

if (CESIUM_TRACING_ENABLED)
    add_compile_definitions(CESIUM_TRACING_ENABLED=1)
endif()

# Add Modules
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_LIST_DIR}/extern/cmake-modules/")

if (CESIUM_COVERAGE_ENABLED AND NOT MSVC)
    include(CodeCoverage)
    append_coverage_compiler_flags()
    setup_target_for_coverage_gcovr_html(
        NAME cesium-native-tests-coverage
        EXECUTABLE ctest -j ${PROCESSOR_COUNT}
        EXCLUDE "${PROJECT_SOURCE_DIR}/extern/*" "${PROJECT_BINARY_DIR}"
        DEPENDENCIES cesium-native-tests
    )
endif()

if (NOT DEFINED GLOB_USE_CONFIGURE_DEPENDS)
    set(GLOB_USE_CONFIGURE_DEPENDS OFF CACHE BOOL
        "Controls if cesium-native targets should use configure_depends or not for globbing their sources"
    )
endif()

set(CESIUM_DEBUG_POSTFIX "d")
set(CESIUM_RELEASE_POSTFIX "")

set(CMAKE_DEBUG_POSTFIX ${CESIUM_DEBUG_POSTFIX})
set(CMAKE_RELEASE_POSTFIX ${CESIUM_RELEASE_POSTFIX})
set(CMAKE_MINSIZEREL_POSTFIX ${CESIUM_RELEASE_POSTFIX})
set(CMAKE_RELWITHDEBINFO_POSTFIX ${CESIUM_RELEASE_POSTFIX})

# Use configure_depends to automatically reconfigure on filesystem
# changes at the expense of computational overhead for CMake to
# determine if new files have been added (-DGLOB_USE_CONFIGURE_DEPENDS).

function(cesium_glob_files out_var_name regexes)
    set(files "")
    foreach(arg ${ARGV})
        list(APPEND regexes_only "${arg}")
    endforeach()
    list(POP_FRONT regexes_only)
    if (GLOB_USE_CONFIGURE_DEPENDS)
        file(GLOB_RECURSE files CONFIGURE_DEPENDS ${regexes_only})
    else()
        file(GLOB files ${regexes_only})
    endif()
    set(${ARGV0} "${files}" PARENT_SCOPE)
endfunction()

# Workaround for targets that erroneously forget to
# declare their include directories as `SYSTEM`
function(target_link_libraries_system target scope)
  set(libs ${ARGN})
  foreach(lib ${libs})
    get_target_property(lib_include_dirs ${lib} INTERFACE_INCLUDE_DIRECTORIES)

    if ("${lib_include_dirs}" MATCHES ".*NOTFOUND$")
        message(FATAL_ERROR "${target}: Cannot use INTERFACE_INCLUDE_DIRECTORIES from target ${lib} as it does not define it")
    endif()

    target_include_directories(${target} SYSTEM ${scope} ${lib_include_dirs})
    target_link_libraries(${target} ${scope} ${lib})
  endforeach()
endfunction()

# Shared object support is currently NOT working on Windows
option(BUILD_SHARED_LIBS "Build shared libraries" OFF)

function(configure_cesium_library targetName)
    if (MSVC)
        target_compile_options(${targetName} PRIVATE /W4 /WX /wd4201 /bigobj)
    else()
        target_compile_options(${targetName} PRIVATE -Werror -Wall -Wextra -Wconversion -Wpedantic -Wshadow -Wsign-conversion)
    endif()

    set_target_properties(${targetName} PROPERTIES
        CXX_STANDARD 17
        CXX_STANDARD_REQUIRED YES
        CXX_EXTENSIONS NO
    )

    target_compile_definitions(
        ${targetName}
        PUBLIC
            GLM_FORCE_XYZW_ONLY # Disable .rgba and .stpq to make it easier to view values from debugger
            GLM_FORCE_EXPLICIT_CTOR # Disallow implicit conversions between dvec3 <-> dvec4, dvec3 <-> fvec3, etc
            GLM_FORCE_SIZE_T_LENGTH # Make vec.length() and vec[idx] use size_t instead of int
    )

    if (BUILD_SHARED_LIBS)
        target_compile_definitions(
            ${targetName}
            PUBLIC
                CESIUM_SHARED=${BUILD_SHARED_LIBS}
        )
    endif()

    if (NOT ${targetName} MATCHES "cesium-native-tests")
        string(TOUPPER ${targetName} capitalizedTargetName)
        target_compile_definitions(
            ${targetName}
            PRIVATE
                ${capitalizedTargetName}_BUILDING
        )
    endif()

    if (CESIUM_EXTRA_INCLUDES)
      target_include_directories(${targetName} PRIVATE ${CESIUM_EXTRA_INCLUDES})
    endif()

endfunction()


# Private Libraries
add_subdirectory(extern EXCLUDE_FROM_ALL)

# These libraries override the debug postfix, so re-override it.
set_target_properties(spdlog PROPERTIES DEBUG_POSTFIX ${CESIUM_DEBUG_POSTFIX})
set_target_properties(tinyxml2 PROPERTIES DEBUG_POSTFIX ${CESIUM_DEBUG_POSTFIX})

# Public Targets
add_subdirectory(CesiumUtility)
add_subdirectory(CesiumGltf)
add_subdirectory(CesiumGeometry)
add_subdirectory(CesiumGeospatial)
add_subdirectory(CesiumJsonReader)
add_subdirectory(CesiumJsonWriter)
add_subdirectory(CesiumGltfReader)
add_subdirectory(CesiumGltfWriter)
add_subdirectory(CesiumAsync)
add_subdirectory(Cesium3DTiles)
add_subdirectory(Cesium3DTilesReader)
add_subdirectory(Cesium3DTilesWriter)
add_subdirectory(Cesium3DTilesSelection)
add_subdirectory(CesiumIonClient)

# Private Targets
if (CESIUM_TESTS_ENABLED)
    # enable_testing() MUST be called before add_subdirectory or no tests
    # will be found by ctest
    enable_testing()
    add_subdirectory(CesiumNativeTests)
endif()

add_subdirectory(doc)

# Installation of third-party libraries required to use cesium-native
install(TARGETS uriparser OPTIONAL) # Skips headers

install(DIRECTORY extern/glm/glm
    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
    COMPONENT GLM
)

install(TARGETS tinyxml2)

install(TARGETS Async++)
install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/extern/asyncplusplus/include/async++.h TYPE INCLUDE)
install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/extern/asyncplusplus/include/async++ TYPE INCLUDE)

install(TARGETS spdlog)
install(DIRECTORY ${CESIUM_NATIVE_SPDLOG_INCLUDE_DIR}/spdlog DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")

install(TARGETS ${CESIUM_NATIVE_DRACO_LIBRARY})

install(TARGETS sqlite3)

install(TARGETS modp_b64)

install(TARGETS httplib)

install(TARGETS csprng)

install(TARGETS GSL)
install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/extern/GSL/include/gsl TYPE INCLUDE)

# ktx_read's PUBLIC_HEADER has paths relative to its own directory, so the install line below will fail.
# We could fix that, but we don't need the KTX public headers installed anyway (they should be considered
# private to cesium-native), so just set the PUBLIC_HEADER to an empty string.
set_target_properties(ktx_read PROPERTIES PUBLIC_HEADER "")
install(TARGETS ktx_read)

install(TARGETS webpdecoder)

install(DIRECTORY ${CESIUM_NATIVE_RAPIDJSON_INCLUDE_DIR}/rapidjson TYPE INCLUDE)

install(TARGETS s2geometry)

install(TARGETS expected-lite)
install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/extern/expected-lite/include/nonstd TYPE INCLUDE)