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pthompthom
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Added cmake tooling
This CMake file was tested under linux, macOS and windows. Also added backend glfw_gl3 for samples.
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‎CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.15)
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project(netImgui)
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set(CMAKE_CXX_STANDARD 17)
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#
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# Options for the project (edit or set those)
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#
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option(NETIMGUI_BUILD_CLIENT "Build client" ON)
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option(NETIMGUI_BUILD_IMGUI "Build imgui from sources in netImgui" ${PROJECT_IS_TOP_LEVEL})
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option(NETIMGUI_BUILD_SAMPLES "Build samples" ${PROJECT_IS_TOP_LEVEL})
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option(NETIMGUI_BUILD_SERVER_LIB "Build server lib" ${PROJECT_IS_TOP_LEVEL})
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option(NETIMGUI_BUILD_SERVER_APP "Build server app" ${PROJECT_IS_TOP_LEVEL})
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if(NETIMGUI_BUILD_SAMPLES)
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# Set which backend to use for the samples between WIN32_DX11 and GLFW_GL3
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# (select only one backend!)
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# (this backend is used only for the local display, the server app can use a different backend)
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if (NOT WIN32)
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set(not_win32 ON)
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endif()
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option(NETIMGUI_SAMPLES_BACKEND_WIN32_DX11 "Use Win32/DX11 backend for samples" ${WIN32})
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option(NETIMGUI_SAMPLES_BACKEND_GLFW_GL3 "Use GLFW/GL3 backend for samples" ${not_win32})
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endif()
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if(NETIMGUI_BUILD_SERVER_APP)
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# NETIMGUI_SERVER_APP_BACKEND:
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# Set which backend to use, between SOKOL, WIN32_DX11, and GLFW_GL3
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# By default, we use Sokol
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# (select only one backend!)
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option(NETIMGUI_SERVER_APP_BACKEND_SOKOL "Use Sokol backend for server app" ON)
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# implementation to be completed below
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# option(NETIMGUI_SERVER_APP_BACKEND_WIN32_DX11 "Use Win32/DX11 backend for server app" OFF)
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# option(NETIMGUI_SERVER_APP_BACKEND_GLFW_GL3 "Use GLFW/GL3 backend for server app" OFF)
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endif()
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#
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# Code directories
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#
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set(CODE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Code)
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set(CLIENT_DIR ${CODE_DIR}/Client)
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set(SERVER_DIR ${CODE_DIR}/ServerApp/Source)
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set(SAMPLES_DIR ${CODE_DIR}/Sample)
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set(IMGUI_DIR ${CODE_DIR}/ThirdParty/DearImgui)
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set(COMMON_DIR ${SAMPLES_DIR}/Common)
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#
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# Add imgui
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#
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function(add_imgui)
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file(GLOB imgui_files ${IMGUI_DIR}/*.cpp ${IMGUI_DIR}/*.h)
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add_library(imgui ${imgui_files})
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target_include_directories(imgui PUBLIC ${IMGUI_DIR} $<BUILD_INTERFACE:${IMGUI_DIR}/backends>)
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# target_compile_definitions(imgui PUBLIC ImTextureID=uint64_t)
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endfunction()
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#
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# Add netImgui Client: this is the library that will be linked to the application logic.
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# The client will sent display commands to the server
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#
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function(add_net_imgui_client)
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file(GLOB_RECURSE client_files ${CLIENT_DIR}/*.cpp ${CLIENT_DIR}/*.h)
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add_library(net_imgui_client ${client_files})
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target_include_directories(net_imgui_client PUBLIC $<BUILD_INTERFACE:${CLIENT_DIR}>)
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target_link_libraries(net_imgui_client PUBLIC imgui)
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endfunction()
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#
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# Add netImgui Server lib (because several server apps can be created, using different backends)
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#
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function(add_net_imgui_server_lib)
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file(GLOB server_files ${SERVER_DIR}/*.cpp ${SERVER_DIR}/*.h)
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add_library(net_imgui_server_lib ${server_files})
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target_link_libraries(net_imgui_server_lib PUBLIC net_imgui_client)
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target_include_directories(net_imgui_server_lib PUBLIC $<BUILD_INTERFACE:${SERVER_DIR}> $<BUILD_INTERFACE:${CODE_DIR}>)
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# Add NetImguiServer_App_Custom
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target_sources(net_imgui_server_lib PRIVATE ${SERVER_DIR}/Custom/NetImguiServer_App_Custom.cpp)
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endfunction()
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#
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# Add Server app (depending on the backend)
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#
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function(_add_net_imgui_server_app_sokol)
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set(server_app_sokol_dir ${SERVER_DIR}/Sokol)
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file(GLOB server_app_sokol_files ${server_app_sokol_dir}/*.cpp)
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add_executable(net_imgui_server_app_sokol ${server_app_sokol_files})
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target_link_libraries(net_imgui_server_app_sokol net_imgui_server_lib)
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# Per platform settings
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if(APPLE)
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target_compile_options(net_imgui_server_app_sokol PRIVATE -x objective-c++)
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target_link_libraries(net_imgui_server_app_sokol "-framework Cocoa" "-framework QuartzCore" "-framework Metal" "-framework MetalKit -framework OpenGL")
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elseif(UNIX)
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target_link_libraries(net_imgui_server_app_sokol X11 GL Xcursor Xi)
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endif()
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endfunction()
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function(_add_net_imgui_server_app_win32_dx11)
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message(FATAL_ERROR "Not implemented")
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endfunction()
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function(_add_net_imgui_server_app_glfw_gl3)
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message(FATAL_ERROR "Not implemented")
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endfunction()
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function(add_net_imgui_server_app)
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# Ensure only one backend is selected
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set(backend_count 0)
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if(NETIMGUI_SERVER_APP_BACKEND_SOKOL)
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math(EXPR backend_count "${backend_count}+1")
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endif()
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if(NETIMGUI_SERVER_APP_BACKEND_WIN32_DX11)
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math(EXPR backend_count "${backend_count}+1")
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endif()
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if(NETIMGUI_SERVER_APP_BACKEND_GLFW_GL3)
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math(EXPR backend_count "${backend_count}+1")
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endif()
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if(NOT backend_count EQUAL 1)
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message(FATAL_ERROR "Select one and only one backend for the server app")
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endif()
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if(NETIMGUI_SERVER_APP_BACKEND_SOKOL)
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target_compile_definitions(net_imgui_server_lib PUBLIC NETIMGUI_SERVER_APP_BACKEND_SOKOL)
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_add_net_imgui_server_app_sokol()
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# elseif(NETIMGUI_SERVER_APP_BACKEND_WIN32_DX11)
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# target_compile_definitions(net_imgui_server_lib PUBLIC NETIMGUI_SERVER_APP_BACKEND_WIN32_DX11)
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# _add_net_imgui_server_app_win32_dx11()
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# elseif(NETIMGUI_SERVER_APP_BACKEND_GLFW_GL3)
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# target_compile_definitions(net_imgui_server_lib PUBLIC NETIMGUI_SERVER_APP_BACKEND_GLFW_GL3)
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# _add_net_imgui_server_app_glfw_gl3()
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endif()
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endfunction()
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#
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# Build all Samples (in a dir whose name starts with "Sample")
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#
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function(_add_backend_to_sample sample_name)
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# Depending on the backend, we need to
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# - use different main files (fill main_file)
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# - link to different libraries (fill link_libraries)
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# - add different backend impl files (fill backend_files)
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if(NETIMGUI_SAMPLES_BACKEND_WIN32_DX11)
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add_compile_definitions(NETIMGUI_SAMPLES_BACKEND_WIN32_DX11)
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set(main_file ${COMMON_DIR}/main.cpp)
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set(backend_files ${IMGUI_DIR}/backends/imgui_impl_dx11.cpp ${IMGUI_DIR}/backends/imgui_impl_win32.cpp)
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set(link_libraries d3d11)
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elseif(NETIMGUI_SAMPLES_BACKEND_GLFW_GL3)
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find_package(glfw3 REQUIRED)
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find_package(OpenGL REQUIRED)
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add_compile_definitions(NETIMGUI_SAMPLES_BACKEND_GLFW_GL3)
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set(main_file ${COMMON_DIR}/main_glfw_gl3.cpp)
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set(backend_files ${IMGUI_DIR}/backends/imgui_impl_glfw.cpp ${IMGUI_DIR}/backends/imgui_impl_opengl3.cpp)
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set(link_libraries glfw OpenGL::GL)
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endif()
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target_sources(${sample_name} PRIVATE ${main_file} ${backend_files})
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target_link_libraries(${sample_name} PRIVATE ${link_libraries})
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endfunction()
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function(_add_common_to_sample sample_name)
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target_sources(${sample_name} PRIVATE ${COMMON_DIR}/Sample.h ${COMMON_DIR}/Sample.cpp)
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target_include_directories(${sample_name} PUBLIC $<BUILD_INTERFACE:${CODE_DIR}>)
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endfunction()
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function(_add_net_imgui_sample sample_name)
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message("Building sample: ${sample_name}")
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set(sample_dir ${SAMPLES_DIR}/${sample_name})
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file(GLOB sample_files ${sample_dir}/*.cpp ${sample_dir}/*.h)
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add_executable(${sample_name} ${sample_files})
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target_link_libraries(${sample_name} PRIVATE net_imgui_client)
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endfunction()
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function(add_net_imgui_samples)
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file(GLOB samples_list ${SAMPLES_DIR}/Sample*)
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foreach (sample_dir ${samples_list})
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get_filename_component(sample_name ${sample_dir} NAME)
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# SampleCompression is not supported, because
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# SampleNetworkWin32.cpp is problematic:
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# - it does not compile outside of windows (need to add #ifdef _WIN32)
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# - under windows, its presence will lead to link error (doubly defined functions): NetImgui::Internal::Network::Startup(void) already defined, etc.
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if (${sample_name} STREQUAL "SampleCompression")
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continue()
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endif()
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_add_net_imgui_sample(${sample_name})
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# Link backend to sample (if not SampleNoBackend)
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if(NOT ${sample_name} STREQUAL "SampleNoBackend")
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_add_common_to_sample(${sample_name})
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_add_backend_to_sample(${sample_name})
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endif()
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endforeach()
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endfunction()
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#
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# Main
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#
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if(NETIMGUI_BUILD_IMGUI)
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add_imgui()
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endif()
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if (NETIMGUI_BUILD_CLIENT)
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add_net_imgui_client()
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endif()
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if(NETIMGUI_BUILD_SERVER_LIB)
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add_net_imgui_server_lib()
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endif()
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if(NETIMGUI_BUILD_SERVER_APP)
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add_net_imgui_server_app()
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endif()
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if(NETIMGUI_BUILD_SAMPLES)
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add_net_imgui_samples()
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endif()

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