CMakeLists.txt

#  SPDX-License-Identifier: MIT
#
#  ES-DE Frontend
#  CMakeLists.txt
#
#  Main CMake configuration file.
#  Sets up the overall build environment including dependencies detection, build options,
#  compiler and linker flags and preprocessor directives.
#

cmake_minimum_required(VERSION 3.13)

if(CMAKE_SYSTEM_NAME MATCHES iOS)
    set(CMAKE_OSX_DEPLOYMENT_TARGET 14.0 CACHE STRING "iOS deployment target")
elseif(APPLE)
    # Set this to the minimum supported macOS version, and also update
    # es-app/assets/ES-DE_Info.plist accordingly.
    set(CMAKE_OSX_DEPLOYMENT_TARGET 11.0 CACHE STRING "macOS deployment target")
    # This optional variable is used for code signing the DMG installer.
    set(MACOS_CODESIGN_IDENTITY "" CACHE STRING "macOS code signing certificate identity")
endif()
project(es-de)

# Application version, update this when making a new release.
set(ES_VERSION 3.2.0)

# Set this to ON to show verbose compiler output (e.g. compiler flags, include directories etc.)
set(CMAKE_VERBOSE_MAKEFILE OFF CACHE BOOL "Show verbose compiler output" FORCE)

# Package type to use for CPack on Linux.
set(LINUX_CPACK_GENERATOR DEB CACHE STRING "CPack generator, DEB or RPM")

# Add local find modules to the CMake path.
list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/CMake/Utils
                              ${CMAKE_CURRENT_SOURCE_DIR}/CMake/Packages)

# Define the options.
option(GL "Set to ON if targeting Desktop OpenGL" ON)
option(GLES "Set to ON if targeting OpenGL ES" OFF)
option(APPLICATION_UPDATER "Set to OFF to build without the application updater" ON)
option(COMPILE_LOCALIZATIONS "Set to OFF to skip compilation of localization message catalogs" ON)
option(APPIMAGE_BUILD "Set to ON when building as an AppImage" OFF)
option(AUR_BUILD "Set to ON when building for the AUR" OFF)
option(FLATPAK_BUILD "Set to ON when building as a Flatpak" OFF)
option(STEAM_DECK "Set to ON to enable a Valve Steam Deck specific build" OFF)
option(RETRODECK "Set to ON to enable a RetroDECK specific build" OFF)
option(RPI "Set to ON to enable a Raspberry Pi specific build" OFF)
option(BUNDLED_CERTS "Set to ON to use bundled TLS/SSL certificates" OFF)
option(CEC "Set to ON to enable CEC" OFF)
option(VIDEO_HW_DECODING "Set to ON to enable FFmpeg HW decoding" OFF)
option(DEINIT_ON_LAUNCH "Set to ON to deinitialize on game launch" OFF)
option(CLANG_TIDY "Set to ON to build using the clang-tidy static analyzer" OFF)
option(ASAN "Set to ON to build with AddressSanitizer" OFF)
option(TSAN "Set to ON to build with ThreadSanitizer" OFF)
option(UBSAN "Set to ON to build with UndefinedBehaviorSanitizer" OFF)

if(CLANG_TIDY)
    find_program(CLANG_TIDY_BINARY NAMES clang-tidy)
    if(CLANG_TIDY_BINARY MATCHES CLANG_TIDY_BINARY-NOTFOUND)
        message("-- CLANG_TIDY was set but the clang-tidy binary was not found")
    else()
        message("-- Building with the clang-tidy static analyzer")
        set(CMAKE_CXX_CLANG_TIDY "clang-tidy;-checks=*,\
                                  -fuchsia-*,\
                                  -hicpp-*,\
                                  -llvm-*,\
                                  -readability-braces-*,\
                                  -google-readability-braces-*,\
                                  -readability-uppercase-literal-suffix,\
                                  -modernize-use-trailing-return-type,\
                                  -cppcoreguidelines-avoid-magic-numbers,\
                                  -readability-magic-numbers")
    endif()
endif()

#---------------------------------------------------------------------------------------------------
# Raspberry Pi setup.

# Raspberry Pi OS 32-bit (armv7l).
if(EXISTS ${CMAKE_FIND_ROOT_PATH}/opt/vc/include/bcm_host.h)
    set(RPI ON)
    set(RPI_32 ON)
    set(GLES ON)
    set(BCMHOST ON)
    message("-- Building on a Raspberry Pi (32-bit OS)")
endif()

# Raspberry Pi OS 64-bit (aarch64).
if(EXISTS /usr/include/bcm_host.h)
    set(RPI ON)
    set(RPI_64 ON)
    set(GLES ON)
    set(BCMHOST ON)
    message("-- Building on a Raspberry Pi (64-bit OS)")
endif()

# iOS.
if(IOS)
    message("-- Building for iOS (arm64)")
    set(GLES ON)
    set(BUNDLED_CERTS ON)
    add_compile_definitions(__IOS__)
    include(${CMAKE_SOURCE_DIR}/ios/cmake/variables.cmake)
endif()

#---------------------------------------------------------------------------------------------------
# Emscripten WebAssembly build.

if(EMSCRIPTEN)
    set(GLES ON)
    set(CMAKE_EXECUTABLE_SUFFIX .html)
endif()

#---------------------------------------------------------------------------------------------------
# OpenGL setup.

if(GLES)
    set(GLSYSTEM "Embedded OpenGL" CACHE STRING "The OpenGL system to be used")
else()
    set(GLSYSTEM "Desktop OpenGL" CACHE STRING "The OpenGL system to be used")
endif()

set_property(CACHE GLSYSTEM PROPERTY STRINGS "Desktop OpenGL" "Embedded OpenGL")

#---------------------------------------------------------------------------------------------------
# Package dependencies.

if(GLSYSTEM MATCHES "Desktop OpenGL")
    set(OpenGL_GL_PREFERENCE GLVND)
    find_package(OpenGL REQUIRED)
elseif(ANDROID)
    find_package(OpenGLES3 REQUIRED)
elseif(GLES AND NOT IOS AND NOT EMSCRIPTEN)
    find_package(OpenGLES2 REQUIRED)
endif()

# On macOS, iOS and Windows all dependencies are kept in-tree in the "external" directory.
if(APPLE AND NOT IOS)
    if(NOT EXISTS ${PROJECT_SOURCE_DIR}/external/FFmpeg)
        message(FATAL_ERROR "-- You need to build the dependencies in ./external first")
    endif()
    find_package(CURL REQUIRED)
elseif(WIN32)
    if(NOT EXISTS ${PROJECT_SOURCE_DIR}/external/pugixml/pugixml.dll)
        message(FATAL_ERROR "-- You need to build the dependencies in ./external first")
    endif()
elseif(NOT EMSCRIPTEN AND NOT ANDROID AND NOT IOS)
    find_package(CURL REQUIRED)
    find_package(FFmpeg REQUIRED)
    find_package(FreeImage REQUIRED)
    find_package(Freetype REQUIRED)
    find_package(HarfBuzz REQUIRED)
    find_package(ICU REQUIRED)
    find_package(Intl REQUIRED)
    find_package(Libgit2 REQUIRED)
    find_package(Pugixml REQUIRED)
    find_package(SDL2 REQUIRED)
endif()

# Add libCEC support.
if(CEC)
    find_package(libCEC REQUIRED)
endif()

# Add ALSA and BlueZ for Linux.
if(CMAKE_SYSTEM_NAME MATCHES Linux)
    find_package(ALSA REQUIRED)
    find_package(Bluez REQUIRED)
endif()

#---------------------------------------------------------------------------------------------------
# Compiler and linker settings.

if(CMAKE_CXX_COMPILER_ID MATCHES Clang)
    message("-- Compiler is Clang/LLVM")
    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0.0)
        message(SEND_ERROR "You need at least Clang 5.0.0 to compile ES-DE")
    endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES GNU)
    message("-- Compiler is GNU/GCC")
    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.1)
        message(SEND_ERROR "You need at least GCC 7.1 to compile ES-DE")
    endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
    message("-- Compiler is MSVC")
    # Disable the built-in min() and max() macros.
    add_compile_definitions(NOMINMAX)
endif()

if(CMAKE_BUILD_TYPE)
    message("-- Build type is ${CMAKE_BUILD_TYPE}")
endif()

# Set up compiler and linker flags for debug, profiling or release builds.
if(CMAKE_BUILD_TYPE MATCHES Debug)
    # Enable the C++17 standard and disable optimizations as it's a debug build.
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++17 /Od /DEBUG:FULL")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -O0 -g3 -Wall -Wpedantic -Wsign-compare -Wnarrowing -Wmissing-field-initializers -Wunused-macros")
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -O0")
    endif()
    # If using Clang, then add additional debug data needed by GDB.
    # Comment this out if you're using LLDB for debugging as this flag makes the binary
    # much larger and the application much slower. On macOS this setting is never enabled
    # as LLDB is the default debugger on this OS.
    if(NOT APPLE AND CMAKE_CXX_COMPILER_ID MATCHES Clang)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_DEBUG")
    endif()
elseif(CMAKE_BUILD_TYPE MATCHES Profiling)
    # For the profiling build, we enable optimizations and supply the required profiler flags.
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++17 /O2 /DEBUG:FULL")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -O2 -g3 -Wall -Wpedantic -Wsign-compare -Wnarrowing -Wmissing-field-initializers -Wunused-macros")
        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -O2")
    endif()
else()
    # Enable the C++17 standard and enable optimizations as it's a release build.
    # This will also disable all assert() macros. Strip the binary too.
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNDEBUG /std:c++17 /O2 /DEBUG:NONE")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 -O2 -DNDEBUG -Wall -Wpedantic -Wsign-compare -Wnarrowing -Wmissing-field-initializers -Wunused-macros")
        if(APPLE)
            set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -O2")
        else()
            set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -O2 -s")
        endif()
    endif()
endif()

# Silence some annoying warnings caused by invalid characters in some FreeImage source comments.
if(CMAKE_CXX_COMPILER_ID MATCHES Clang AND CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 15.0.0)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-invalid-utf8")
endif()

if(ANDROID)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -llog")
endif()

if(EMSCRIPTEN)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s USE_SDL=2 -pthread")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s INITIAL_MEMORY=33554432 -s ALLOW_MEMORY_GROWTH=1 -s WASM=1 -s ASSERTIONS=1 -s EXIT_RUNTIME=1 -s USE_SDL=2 \
                                -pthread -s PTHREAD_POOL_SIZE=4 -s DEMANGLE_SUPPORT=1 -s USE_WEBGL2=1 -s FULL_ES3=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s ASYNCIFY \
                                --preload-file ${PROJECT_SOURCE_DIR}/resources@/home/web_user/ES-DE/resources/ \
                                --preload-file ${PROJECT_SOURCE_DIR}/themes/slate-es-de@/home/web_user/ES-DE/themes/slate-es-de/ \
                                --preload-file ${PROJECT_SOURCE_DIR}/ROMs@/home/web_user/ROMs/")
endif()

# Raspberry Pi model 3 and higher (ARM Cortex-A53 minimum).
if(RPI_32)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -latomic -mcpu=cortex-a53 -mfpu=neon-fp-armv8")
elseif(RPI_64)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -latomic -mcpu=cortex-a53")
endif()

if(ASAN AND TSAN)
    message(FATAL_ERROR "-- AddressSanitizer and ThreadSanitizer can't be combined")
endif()

if(ASAN)
    message("-- Building with AddressSanitizer")
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /fsanitize=address")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address -fno-omit-frame-pointer")
    endif()
endif()

if(TSAN)
    message("-- Building with ThreadSanitizer")
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        message(FATAL_ERROR "-- ThreadSanitizer not available for MSVC")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer")
    endif()
endif()

if(UBSAN)
    message("-- Building with UndefinedBehaviorSanitizer")
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        message(FATAL_ERROR "-- UndefinedBehaviorSanitizer not available for MSVC")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
    endif()
endif()

if(ASAN OR UBSAN)
    # Add some extra checks when building with AddressSanitizer or UndefinedBehaviorSanitizer.
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_ASSERTIONS -D_FORTIFY_SOURCE=3")
endif()

# The following removes the ranlib warnings on macOS regarding missing symbols for files that have
# been #ifdef'ed away.
if(APPLE)
    SET(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -no_warning_for_no_symbols -c <TARGET>")
    SET(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> -no_warning_for_no_symbols -c <TARGET>")
endif()

if(APPLE)
    if(MACOS_CODESIGN_IDENTITY)
        message("-- Code signing certificate identity: " ${MACOS_CODESIGN_IDENTITY})
    endif()
endif()

if(ANDROID)
    set(BUNDLED_CERTS ON)
    set(COMPILE_LOCALIZATIONS OFF)
    add_compile_definitions(ANDROID_VERSION_CODE=${ANDROID_VERSION_CODE})
    add_compile_definitions(ANDROID_APPLICATION_ID="org.es_de.frontend")
endif()

if(WIN32)
    set(BUNDLED_CERTS ON)
    add_compile_definitions(UNICODE)
    add_compile_definitions(_UNICODE)
endif()

#---------------------------------------------------------------------------------------------------
# Preprocessor directives.

if(GLES)
    add_compile_definitions(USE_OPENGLES)
    message("-- Building with OpenGL ES renderer")
endif()

if(APPIMAGE_BUILD AND FLATPAK_BUILD)
    message(FATAL_ERROR "-- APPIMAGE_BUILD and FLATPAK_BUILD can't be combined")
endif()

if(APPIMAGE_BUILD)
    if(NOT CMAKE_SYSTEM_NAME MATCHES Linux)
        message(FATAL_ERROR "-- APPIMAGE_BUILD can only be used when building on Linux")
    endif()
    add_compile_definitions(APPIMAGE_BUILD)
    message("-- Building as an AppImage")
endif()

if(FLATPAK_BUILD)
    if(NOT CMAKE_SYSTEM_NAME MATCHES Linux)
        message(FATAL_ERROR "-- FLATPAK_BUILD can only be used when building on Linux")
    endif()
    add_compile_definitions(FLATPAK_BUILD)
    message("-- Building as a Flatpak")
endif()

if(AUR_BUILD)
    message("-- Building for the AUR")
endif()

if(STEAM_DECK AND RETRODECK)
    message(FATAL_ERROR "-- STEAM_DECK and RETRODECK can't be combined")
endif()

if(STEAM_DECK)
    add_compile_definitions(STEAM_DECK)
    message("-- Building for the Valve Steam Deck")
endif()

if(RETRODECK)
    add_compile_definitions(RETRODECK)
    message("-- Building for RetroDECK")
endif()

if(RPI)
    add_compile_definitions(RASPBERRY_PI)
endif()

if(BUNDLED_CERTS)
    add_compile_definitions(USE_BUNDLED_CERTIFICATES)
    message("-- Building with bundled TLS/SSL certificates")
endif()

if(DEFINED libCEC_FOUND)
    add_compile_definitions(HAVE_LIBCEC)
endif()

if(VIDEO_HW_DECODING)
    add_compile_definitions(VIDEO_HW_DECODING)
    message("-- Building with FFmpeg HW decoding")
endif()

if(DEINIT_ON_LAUNCH)
    if(CMAKE_SYSTEM_NAME MATCHES Linux OR CMAKE_SYSTEM_NAME MATCHES FreeBSD)
        add_compile_definitions(DEINIT_ON_LAUNCH)
        message("-- Building with deinitialization on game launch")
    else()
        message(FATAL_ERROR "-- Deinitialization on game launch can only be used on Linux and FreeBSD")
    endif()
endif()

if(AUR_BUILD OR FLATPAK_BUILD OR RETRODECK OR RPI OR HAIKU OR IOS OR CMAKE_SYSTEM_NAME MATCHES FreeBSD)
    set(APPLICATION_UPDATER OFF)
endif()

if(APPLICATION_UPDATER)
    add_compile_definitions(APPLICATION_UPDATER)
else()
    message("-- Building without application updater")
endif()

# This is needed by the application updater to identify the package type.
if(CMAKE_SYSTEM_NAME MATCHES Linux)
    if(LINUX_CPACK_GENERATOR MATCHES DEB)
        add_compile_definitions(LINUX_DEB_PACKAGE)
    elseif(LINUX_CPACK_GENERATOR MATCHES RPM)
        add_compile_definitions(LINUX_RPM_PACKAGE)
    endif()
endif()

if(APPLE)
    if(CMAKE_SYSTEM_PROCESSOR MATCHES arm)
        add_compile_definitions(MACOS_APPLE_CPU)
    else()
        add_compile_definitions(MACOS_INTEL_CPU)
    endif()
endif()

if(ANDROID)
    if(ANDROID_ABI MATCHES arm64-v8a)
        message("-- Building for Android arm64-v8a on API level ${ANDROID_PLATFORM}")
        set(ANDROID_CPU_ARCH arm64-v8a)
    elseif(ANDROID_ABI MATCHES armeabi-v7a)
        message("-- Building for Android armeabi-v7a on API level ${ANDROID_PLATFORM}")
        set(ANDROID_CPU_ARCH armeabi-v7a)
    elseif(ANDROID_ABI MATCHES x86_64)
        message("-- Building for Android x86_64 on API level ${ANDROID_PLATFORM}")
        set(ANDROID_CPU_ARCH x86_64)
    else()
        message(FATAL_ERROR "-- Unsupported Android ABI: " ${ANDROID_ABI})
    endif()
    message("-- Building with Android version code " ${ANDROID_VERSION_CODE})
endif()

# Affects the application updater and is used for displaying version info in the main menu.
if(ES_VERSION MATCHES alpha OR ES_VERSION MATCHES beta OR ES_VERSION MATCHES dev)
    add_compile_definitions(IS_PRERELEASE)
endif()

# GLM library options.
add_compile_definitions(GLM_FORCE_CXX17)
add_compile_definitions(GLM_FORCE_XYZW_ONLY)

# For Unix systems, assign the installation prefix. If it's not explicitly set,
# we use /usr on Linux and /usr/local on FreeBSD.
if(NOT WIN32 AND NOT APPLE AND NOT ANDROID)
    if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
        if(CMAKE_SYSTEM_NAME MATCHES Linux)
            set(CMAKE_INSTALL_PREFIX /usr CACHE INTERNAL CMAKE_INSTALL_PREFIX)
        else()
            set(CMAKE_INSTALL_PREFIX /usr/local CACHE INTERNAL CMAKE_INSTALL_PREFIX)
        endif()
    endif()
    message("-- Installation prefix is set to " ${CMAKE_INSTALL_PREFIX})
    add_compile_definitions(ES_INSTALL_PREFIX="${CMAKE_INSTALL_PREFIX}")
endif()

# For Windows, set the minimum OS version to Windows 7.
if(WIN32)
    add_compile_definitions(_WIN32_WINNT=0x0601)
    add_compile_definitions(WINVER=0x0601)
endif()

#---------------------------------------------------------------------------------------------------
# Include files.

set(COMMON_INCLUDE_DIRS ${CURL_INCLUDE_DIR}
                        ${CMAKE_CURRENT_SOURCE_DIR}/external/CImg
                        ${CMAKE_CURRENT_SOURCE_DIR}/external/glm
                        ${CMAKE_CURRENT_SOURCE_DIR}/external/lunasvg/include
                        ${CMAKE_CURRENT_SOURCE_DIR}/external/rapidjson/include
                        ${CMAKE_CURRENT_SOURCE_DIR}/external/rlottie/inc
                        ${CMAKE_CURRENT_SOURCE_DIR}/external/utfcpp/source
                        ${CMAKE_CURRENT_SOURCE_DIR}/es-core/src
                        ${CMAKE_CURRENT_SOURCE_DIR}/es-pdf-converter/src)
if(IOS)
    set(COMMON_INCLUDE_DIRS ${COMMON_INCLUDE_DIRS}
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/curl/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/ffmpeg-kit/src/ffmpeg
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/FreeImage/Source
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freetype/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/gettext/gettext-runtime/intl
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/libgit2/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/harfbuzz/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/icu/icu4c/source/common
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/pugixml/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/SDL)
elseif(APPLE)
    set(COMMON_INCLUDE_DIRS ${COMMON_INCLUDE_DIRS}
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/FFmpeg
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freeimage/FreeImage/Source
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freetype/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/gettext/gettext-runtime/intl
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/libgit2/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/harfbuzz/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/icu/icu4c/source/common
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/pugixml/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/SDL)
elseif(WIN32)
    set(COMMON_INCLUDE_DIRS ${COMMON_INCLUDE_DIRS}
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/curl/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/glew/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/ffmpeg/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/FreeImage/Dist/x64
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freetype/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/gettext/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/harfbuzz/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/icu/icu4c/source/common
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/libgit2/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/pugixml/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/SDL2)
elseif(EMSCRIPTEN)
    set(COMMON_INCLUDE_DIRS ${COMMON_INCLUDE_DIRS}
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/curl/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/ffmpeg.wasm-core
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/FreeImage-CMake/FreeImage/Source
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freetype/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/pugixml/src)
elseif(ANDROID)
    set(COMMON_INCLUDE_DIRS ${COMMON_INCLUDE_DIRS}
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/curl/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/ffmpeg-kit/src/ffmpeg
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freeimage/FreeImage/Source
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/freetype/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/gettext/gettext-runtime/intl
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/harfbuzz/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/icu/icu4c/source/common
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/libgit2/include
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/pugixml/src
                            ${CMAKE_CURRENT_SOURCE_DIR}/external/SDL_Android)
else()
    set(COMMON_INCLUDE_DIRS ${COMMON_INCLUDE_DIRS}
                            ${BLUEZ_INCLUDE_DIRS}
                            ${FFMPEG_INCLUDE_DIRS}
                            ${FreeImage_INCLUDE_DIRS}
                            ${FREETYPE_INCLUDE_DIRS}
                            ${GIT2_INCLUDE_PATH}
                            ${HarfBuzz_INCLUDE_DIRS}
                            ${ICU_INCLUDE_DIRS}
                            ${PUGIXML_INCLUDE_DIRS}
                            ${SDL2_INCLUDE_DIR})
endif()

# Add libCEC include directory.
if(DEFINED libCEC_FOUND)
    list(APPEND COMMON_INCLUDE_DIRS ${libCEC_INCLUDE_DIR})
endif()

# For Linux, add the ALSA include directory.
if(CMAKE_SYSTEM_NAME MATCHES Linux)
    list(APPEND COMMON_INCLUDE_DIRS ${ALSA_INCLUDE_DIRS})
endif()

if(RPI_32)
    list(APPEND COMMON_INCLUDE_DIRS ${CMAKE_FIND_ROOT_PATH}/opt/vc/include
                                    ${CMAKE_FIND_ROOT_PATH}/opt/vc/include/interface/vcos
                                    ${CMAKE_FIND_ROOT_PATH}/opt/vc/include/interface/vmcs_host/linux
                                    ${CMAKE_FIND_ROOT_PATH}/opt/vc/include/interface/vcos/pthreads)
endif()

#---------------------------------------------------------------------------------------------------
# Dependency libraries.

if(IOS)
    set(COMMON_LIBRARIES ${COMMON_LIBRARIES}
                         ${PROJECT_SOURCE_DIR}/Frameworks/libavcodec.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libavfilter.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libavformat.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libavutil.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libswresample.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libswscale.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libcurl.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libfontconfig.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libfreeimage.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libfreetype.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libgit.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libharfbuzz.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libicudata.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libicui18n.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libicuuc.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libintl.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libopenjpeg.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libpoppler.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libpoppler-cpp.xcframework
                         ${PROJECT_SOURCE_DIR}/Frameworks/libSDL.xcframework
                         ${PROJECT_SOURCE_DIR}/libpugixml.a)
elseif(APPLE)
    set(COMMON_LIBRARIES ${COMMON_LIBRARIES}
                         ${CURL_LIBRARIES}
                         ${PROJECT_SOURCE_DIR}/libavcodec.60.dylib
                         ${PROJECT_SOURCE_DIR}/libavfilter.9.dylib
                         ${PROJECT_SOURCE_DIR}/libavformat.60.dylib
                         ${PROJECT_SOURCE_DIR}/libavutil.58.dylib
                         ${PROJECT_SOURCE_DIR}/libswresample.4.dylib
                         ${PROJECT_SOURCE_DIR}/libswscale.7.dylib
                         ${PROJECT_SOURCE_DIR}/libfreeimage.a
                         ${PROJECT_SOURCE_DIR}/libfreetype.6.dylib
                         ${PROJECT_SOURCE_DIR}/libgit2.1.7.dylib
                         ${PROJECT_SOURCE_DIR}/libharfbuzz.dylib
                         ${PROJECT_SOURCE_DIR}/libicudata.75.dylib
                         ${PROJECT_SOURCE_DIR}/libicui18n.75.dylib
                         ${PROJECT_SOURCE_DIR}/libicuuc.75.dylib
                         ${PROJECT_SOURCE_DIR}/libintl.8.dylib
                         ${PROJECT_SOURCE_DIR}/libpugixml.a
                         ${PROJECT_SOURCE_DIR}/libSDL2-2.0.0.dylib)
elseif(WIN32)
    set(COMMON_LIBRARIES ${PROJECT_SOURCE_DIR}/avcodec.lib
                            ${PROJECT_SOURCE_DIR}/avfilter.lib
                            ${PROJECT_SOURCE_DIR}/avformat.lib
                            ${PROJECT_SOURCE_DIR}/avutil.lib
                            ${PROJECT_SOURCE_DIR}/swresample.lib
                            ${PROJECT_SOURCE_DIR}/swscale.lib
                            ${PROJECT_SOURCE_DIR}/FreeImage.lib
                            ${PROJECT_SOURCE_DIR}/git2.lib
                            ${PROJECT_SOURCE_DIR}/glew32.lib
                            ${PROJECT_SOURCE_DIR}/harfbuzz.lib
                            ${PROJECT_SOURCE_DIR}/icudt.lib
                            ${PROJECT_SOURCE_DIR}/icuin.lib
                            ${PROJECT_SOURCE_DIR}/icuuc.lib
                            ${PROJECT_SOURCE_DIR}/libcurl-x64.lib
                            ${PROJECT_SOURCE_DIR}/libintl-8.lib
                            ${PROJECT_SOURCE_DIR}/freetype.lib
                            ${PROJECT_SOURCE_DIR}/lunasvg.lib
                            ${PROJECT_SOURCE_DIR}/pugixml.lib
                            ${PROJECT_SOURCE_DIR}/rlottie.lib
                            ${PROJECT_SOURCE_DIR}/SDL2main.lib
                            ${PROJECT_SOURCE_DIR}/SDL2.lib
                            iphlpapi.dll
                            bthprops.lib
                            Winmm.dll)
elseif(ANDROID)
    set(COMMON_LIBRARIES ${COMMON_LIBRARIES}
                        # FFmpeg libraries.
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libavcodec.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libavfilter.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libavformat.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libavutil.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libswresample.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libswscale.so
                        # Other dependencies.
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libcurl.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libcrypto.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libfreeimage.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libfreetype.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libgit2.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libharfbuzz.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libicudata.a
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libicui18n.a
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libicuuc.a
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libintl.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libjpeg.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libpoppler.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libpugixml.a
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libSDL2.so
                        ${PROJECT_SOURCE_DIR}/android/libs/${ANDROID_CPU_ARCH}/libssl.so)
elseif(EMSCRIPTEN)
    set(COMMON_LIBRARIES ${COMMON_LIBRARIES}
                         # FFmpeg core libraries.
                         ${PROJECT_SOURCE_DIR}/libavcodec.a
                         ${PROJECT_SOURCE_DIR}/libavfilter.a
                         ${PROJECT_SOURCE_DIR}/libavformat.a
                         ${PROJECT_SOURCE_DIR}/libavutil.a
                         ${PROJECT_SOURCE_DIR}/libpostproc.a
                         ${PROJECT_SOURCE_DIR}/libswresample.a
                         ${PROJECT_SOURCE_DIR}/libswscale.a
                         # FFmpeg third party libraries.
                         ${PROJECT_SOURCE_DIR}/libx264.a
                         ${PROJECT_SOURCE_DIR}/libx265.a
                         ${PROJECT_SOURCE_DIR}/libass.a
                         ${PROJECT_SOURCE_DIR}/libfdk-aac.a
                         ${PROJECT_SOURCE_DIR}/libfribidi.a
                         ${PROJECT_SOURCE_DIR}/libharfbuzz.a
                         ${PROJECT_SOURCE_DIR}/libmp3lame.a
                         ${PROJECT_SOURCE_DIR}/libogg.a
                         ${PROJECT_SOURCE_DIR}/libopus.a
                         ${PROJECT_SOURCE_DIR}/libtheoradec.a
                         ${PROJECT_SOURCE_DIR}/libtheoraenc.a
                         ${PROJECT_SOURCE_DIR}/libvorbis.a
                         ${PROJECT_SOURCE_DIR}/libvorbisenc.a
                         ${PROJECT_SOURCE_DIR}/libvorbisfile.a
                         ${PROJECT_SOURCE_DIR}/libvpx.a
                         ${PROJECT_SOURCE_DIR}/libwavpack.a
                         ${PROJECT_SOURCE_DIR}/libz.a
                         # Other dependencies.
                         ${PROJECT_SOURCE_DIR}/libcurl.a
                         ${PROJECT_SOURCE_DIR}/libFreeImage.a
                         ${PROJECT_SOURCE_DIR}/libfreetype.a
                         ${PROJECT_SOURCE_DIR}/libpugixml.a)
else()
    set(COMMON_LIBRARIES ${BLUEZ_LIBRARIES}
                         ${CURL_LIBRARIES}
                         ${FFMPEG_LIBRARIES}
                         ${FreeImage_LIBRARIES}
                         ${FREETYPE_LIBRARIES}
                         ${GIT2_LIBRARY}
                         ${HarfBuzz_LIBRARIES}
                         ${ICU_LIBRARIES}
                         ${PUGIXML_LIBRARIES}
                         ${SDL2_LIBRARY})
    if(Intl_LIBRARY)
        # On Unix systems where the gettext functions are not part of the C standard library
        # we need to explicitly link with the libintl library.
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${Intl_LIBRARY})
    endif()
endif()

if(NOT WIN32)
    # SVG rendering library LunaSVG and Lottie animation library rlottie.
    if(ANDROID)
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${PROJECT_SOURCE_DIR}/android_${ANDROID_ABI}/liblunasvg.a)
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${PROJECT_SOURCE_DIR}/android_${ANDROID_ABI}/librlottie.a)
    elseif(IOS)
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${PROJECT_SOURCE_DIR}/${CMAKE_BUILD_TYPE}/liblunasvg.a)
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${PROJECT_SOURCE_DIR}/${CMAKE_BUILD_TYPE}/librlottie.a)
    else()
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${PROJECT_SOURCE_DIR}/liblunasvg.a)
        set(COMMON_LIBRARIES ${COMMON_LIBRARIES} ${PROJECT_SOURCE_DIR}/librlottie.a)
    endif()
endif()

if(APPLE AND NOT IOS)
    # See es-app/CMakeLists.txt for an explation for why an extra "Resources" directory
    # has been added to the install prefix.
    set(CMAKE_INSTALL_PREFIX "/Applications/ES-DE.app/Contents/Resources")

    # Set the same rpath links for the install executable as for the build executable.
    set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

    set(CMAKE_INSTALL_RPATH @executable_path)
endif()

# Add libCEC libraries.
if(DEFINED libCEC_FOUND)
    list(APPEND COMMON_LIBRARIES dl ${libCEC_LIBRARIES})
endif()

# Add ALSA for Linux libraries.
if(CMAKE_SYSTEM_NAME MATCHES Linux)
    list(APPEND COMMON_LIBRARIES ${ALSA_LIBRARY})
endif()

# Raspberry Pi.
if(BCMHOST)
    list(APPEND COMMON_LIBRARIES bcm_host vchiq_arm)
    if(RPI_32)
        link_directories(${CMAKE_FIND_ROOT_PATH}/opt/vc/lib)
    endif()
endif()

# OpenGL.
if(GLSYSTEM MATCHES "Desktop OpenGL")
    list(APPEND COMMON_LIBRARIES ${OPENGL_LIBRARIES})
elseif(GLES AND ANDROID)
    list(APPEND COMMON_LIBRARIES ${OPENGLES3_LIBRARIES})
elseif(GLES)
    list(APPEND COMMON_LIBRARIES ${OPENGLES2_LIBRARIES})
endif()

#---------------------------------------------------------------------------------------------------
# Build directories.

set(dir ${CMAKE_CURRENT_SOURCE_DIR})
set(EXECUTABLE_OUTPUT_PATH ${dir} CACHE PATH "Build directory" FORCE)
set(LIBRARY_OUTPUT_PATH ${dir} CACHE PATH "Build directory" FORCE)

if(COMPILE_LOCALIZATIONS)
    add_subdirectory(locale)
endif()

add_subdirectory(es-pdf-converter)
add_subdirectory(external)
add_subdirectory(es-core)
add_subdirectory(es-app)

# Make sure that es-pdf-convert is built first, and then that rlottie is built before es-core.
add_dependencies(lunasvg es-pdf-convert)

if(COMPILE_LOCALIZATIONS)
    add_dependencies(es-pdf-convert localization)
endif()

add_dependencies(es-core rlottie)

# Set lottie2gif to not be built.
set_target_properties(lottie2gif PROPERTIES EXCLUDE_FROM_ALL 1 EXCLUDE_FROM_DEFAULT_BUILD 1)