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Add all CMakeLists.txt
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‎CMakeLists.txt

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cmake_minimum_required(VERSION 3.8.2)
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project(imgui
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VERSION 1.82
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LANGUAGES C CXX
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)
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option(IMGUI_BACKEND_OPENGL2 "Build OpenGL 2 backend" ON)
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option(IMGUI_BACKEND_OPENGL3 "Build OpenGL 3 backend" OFF)
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option(IMGUI_BACKEND_SDL2 "Build SDL2 backend" ON)
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if(MSVC)
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set(IMGUI_SDL_PREBUILT_DIR "" CACHE PATH "Path containing prebuilt SDL")
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endif()
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option(IMGUI_BACKEND_GLFW "Build GLFW backend" ON)
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if(MSVC)
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set(IMGUI_GLFW_PREBUILT_DIR "" CACHE PATH "Path containing prebuilt GLFW")
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endif()
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option(IMGUI_BUILD_EXAMPLES "Build examples" ON)
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option(IMGUI_DEMO "Build imgui_demo.cpp" ON)
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set(IMGUI_HEADERS
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"${CMAKE_CURRENT_LIST_DIR}/imgui.h"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_internal.h"
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)
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set(IMGUI_STB_HEADERS
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"${CMAKE_CURRENT_LIST_DIR}/imstb_rectpack.h"
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"${CMAKE_CURRENT_LIST_DIR}/imstb_textedit.h"
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"${CMAKE_CURRENT_LIST_DIR}/imstb_truetype.h"
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)
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set(IMGUI_SOURCES
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"${CMAKE_CURRENT_LIST_DIR}/imgui.cpp"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_draw.cpp"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_tables.cpp"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_widgets.cpp"
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)
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if(IMGUI_DEMO)
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list(APPEND IMGUI_SOURCES "${CMAKE_CURRENT_LIST_DIR}/imgui_demo.cpp")
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endif()
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add_library(imgui SHARED ${IMGUI_SOURCES})
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target_sources(imgui INTERFACE
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${IMGUI_SOURCES}
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${IMGUI_HEADERS}
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${IMGUI_STB_HEADERS}
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)
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target_include_directories(imgui INTERFACE "${CMAKE_CURRENT_LIST_DIR}")
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# if(IMGUI_BACKEND_OPENGL3 AND (NOT CMAKE_SYSTEM_NAME STREQUAL Emscripten))
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# add_subdirectory(examples/libs/gl3w)
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# endif()
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add_subdirectory(backends)
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if(IMGUI_BUILD_EXAMPLES)
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add_subdirectory(examples)
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endif()

‎backends/CMakeLists.txt

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if (IMGUI_BACKEND_OPENGL2 OR IMGUI_BACKEND_OPENGL3)
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if(POLICY CMP0072)
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cmake_policy(SET CMP0072 NEW)
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endif()
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find_package(OpenGL REQUIRED)
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endif()
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# OpenGL 2
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if (IMGUI_BACKEND_OPENGL2)
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add_library(imgui-opengl2 INTERFACE)
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target_sources(imgui-opengl2 INTERFACE
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_opengl2.h"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_opengl2.cpp"
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)
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target_link_libraries(imgui-opengl2 INTERFACE
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imgui
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OpenGL::GL
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)
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endif()
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# OpenGL 3
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if (IMGUI_BACKEND_OPENGL3)
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add_library(imgui-opengl3 INTERFACE)
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target_sources(imgui-opengl3 INTERFACE
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_opengl3.h"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_opengl3.cpp"
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)
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target_link_libraries(imgui-opengl3 INTERFACE
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imgui
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OpenGL::GL
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imgui-gl3w # TODO: allow to choose OpenGL3 loader
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)
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endif()
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# SDL
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if(IMGUI_BACKEND_SDL)
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# find SDL2
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if(CMAKE_SYSTEM_NAME STREQUAL Emscripten)
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# Nothing to do for emscripten builds. SDL is bunled with the compiler.
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elseif(TARGET SDL2::SDL2)
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# user has already added SDL2::SDL2 target by any means
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elseif(MSVC AND IMGUI_SDL2_PREBUILT_DIR)
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# On Windows you may set IMGUI_SDL2_PREBUILT_DIR variable and link to binary SDL distribution.
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(IMGUI_SDL2_PLATFORM_ARCH x64)
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elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
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set(IMGUI_SDL2_PLATFORM_ARCH x86)
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else ()
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message(FATAL_ERROR "Unsupported platform.")
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endif()
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add_library(SDL2 SHARED IMPORTED GLOBAL)
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target_include_directories(SDL2 INTERFACE "${IMGUI_SDL2_PREBUILT_DIR}/include")
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set_target_properties(SDL2 PROPERTIES
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IMPORTED_LOCATION "${IMGUI_SDL2_PREBUILT_DIR}/lib/${IMGUI_SDL2_PLATFORM_ARCH}/SDL2.dll"
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IMPORTED_IMPLIB "${IMGUI_SDL2_PREBUILT_DIR}/lib/${IMGUI_SDL2_PLATFORM_ARCH}/SDL2.lib"
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)
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add_library(SDL2::SDL2 ALIAS SDL2)
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add_library(SDL2main STATIC IMPORTED GLOBAL)
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set_target_properties(SDL2main PROPERTIES
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IMPORTED_LOCATION "${IMGUI_SDL2_PREBUILT_DIR}/lib/${IMGUI_SDL2_PLATFORM_ARCH}/SDL2main.lib"
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)
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elseif(SDL2_FOUND)
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# Platforms that do not export target but use old CMake conventions can be handled this way.
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add_library(SDL2::SDL2 INTERFACE IMPORTED)
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target_link_libraries(SDL2::SDL2 INTERFACE ${SDL2_LIBRARIES})
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target_include_directories(SDL2::SDL2 INTERFACE ${SDL2_INCLUDE_DIRS})
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elseif(PkgConfig_FOUND)
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# Rest of the platforms (like MacOS) can consume SDL via pkg-config.
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# CMake 3.6 supports IMPORTED_TARGET parameter which creates PkgConfig::sdl2 target that we can easily link to.
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# TODO: Switch to using IMPORTED_TARGET when CMake minimal version is increased.
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pkg_check_modules(SDL2 QUIET sdl2)
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if(SDL2_FOUND)
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add_library(SDL2::SDL2 INTERFACE IMPORTED)
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target_link_libraries(SDL2::SDL2 INTERFACE ${SDL2_LDFLAGS})
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target_compile_options(SDL2::SDL2 INTERFACE ${SDL2_CFLAGS})
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endif()
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else()
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find_package(SDL2 REQUIRED)
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endif()
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add_library(imgui-sdl INTERFACE)
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target_sources(imgui-sdl INTERFACE
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_sdl2.h"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_sdl2.cpp"
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)
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target_include_directories(imgui-sdl INTERFACE "${CMAKE_CURRENT_LIST_DIR}")
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target_link_libraries(imgui-sdl INTERFACE imgui SDL2::SDL2)
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endif()
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# GLFW
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if(IMGUI_BACKEND_GLFW)
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# find glfw
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if(TARGET glfw)
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# GLFW exists already. Nothing to do.
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elseif(MSVC)
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# On Windows you may set IMGUI_GLFW_PREBUILT_DIR variable and link to binary GLFW distribution.
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if(IMGUI_GLFW_PREBUILT_DIR)
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set(IMGUI_GLFW_INCLUDE_DIR "${IMGUI_GLFW_PREBUILT_DIR}/include")
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set(IMGUI_GLFW_LIB_DIR "${IMGUI_GLFW_PREBUILT_DIR}/lib-vc2019") # TODO: don't hardcode VC version
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add_library(glfw SHARED IMPORTED GLOBAL)
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target_include_directories(glfw INTERFACE "${IMGUI_GLFW_INCLUDE_DIR}")
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set_target_properties(glfw PROPERTIES
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IMPORTED_IMPLIB "${IMGUI_GLFW_LIB_DIR}/glfw3.lib"
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IMPORTED_LOCATION "${IMGUI_GLFW_LIB_DIR}/glfw3.dll"
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)
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else() # Use prebuilt GLFW from Dear ImGui's repo (only static build is included)
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(IMGUI_GLFW_PLATFORM_BITS 64)
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elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
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set(IMGUI_GLFW_PLATFORM_BITS 32)
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else()
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message(FATAL_ERROR "Unsupported platform.")
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endif()
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set(IMGUI_GLFW_DIR "${PROJECT_SOURCE_DIR}/examples/libs/glfw")
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set(IMGUI_GLFW_INCLUDE_DIR "${IMGUI_GLFW_DIR}/include")
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set(IMGUI_GLFW_LIB_DIR "${IMGUI_GLFW_DIR}/lib-vc2010-${IMGUI_GLFW_PLATFORM_BITS}")
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add_library(glfw STATIC IMPORTED GLOBAL)
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target_include_directories(glfw INTERFACE "${IMGUI_GLFW_INCLUDE_DIR}")
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set_target_properties(glfw PROPERTIES
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IMPORTED_LOCATION "${IMGUI_GLFW_LIB_DIR}/glfw3.lib"
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)
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endif()
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elseif(PkgConfig_FOUND)
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# CMake 3.6 supports IMPORTED_TARGET parameter which creates PkgConfig::glfw target that we can easily link to.
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# TODO: Switch to using IMPORTED_TARGET when CMake minimal version is increased.
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pkg_check_modules(GLFW QUIET glfw3)
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if(GLFW_FOUND)
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add_library(glfw INTERFACE IMPORTED)
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target_link_libraries(glfw INTERFACE ${GLFW_LDFLAGS})
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target_compile_options(glfw INTERFACE ${GLFW_CFLAGS})
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endif()
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else()
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find_package(glfw3 REQUIRED)
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endif()
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add_library(imgui-glfw INTERFACE)
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target_sources(imgui-glfw INTERFACE
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_glfw.h"
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"${CMAKE_CURRENT_LIST_DIR}/imgui_impl_glfw.cpp"
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)
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target_link_libraries(imgui-glfw INTERFACE ${CMAKE_DL_LIBS} glfw)
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target_include_directories(imgui-glfw INTERFACE "${CMAKE_CURRENT_LIST_DIR}")
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endif()

‎examples/CMakeLists.txt

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if(IMGUI_BACKEND_SDL)
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if (IMGUI_BACKEND_OPENGL2)
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add_subdirectory(example_sdl_opengl2)
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endif()
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if (IMGUI_BACKEND_OPENGL3)
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add_subdirectory(example_sdl_opengl3)
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endif()
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endif()
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if(IMGUI_BACKEND_GLFW)
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if (IMGUI_BACKEND_OPENGL2)
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add_subdirectory(example_glfw_opengl2)
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endif()
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if (IMGUI_BACKEND_OPENGL3)
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add_subdirectory(example_glfw_opengl3)
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endif()
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endif()

‎examples/example_glfw_opengl2/CMakeLists.txt

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add_executable(example_glfw_opengl2)
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target_sources(example_glfw_opengl2 PUBLIC "${CMAKE_CURRENT_LIST_DIR}/main.cpp")
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target_link_libraries(example_glfw_opengl2 PUBLIC
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imgui-glfw
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imgui-opengl2
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)
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if(WIN32)
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get_target_property(GLFW3_BUILD_TYPE glfw TYPE)
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if (GLFW3_BUILD_TYPE STREQUAL SHARED_LIBRARY)
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add_custom_command(TARGET example_glfw_opengl2 POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy_if_different
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$<TARGET_FILE:glfw>
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$<TARGET_FILE_DIR:example_glfw_opengl2>
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)
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endif()
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endif()

‎examples/example_glfw_opengl3/CMakeLists.txt

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add_executable(example_glfw_opengl3)
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target_sources(example_glfw_opengl3 PUBLIC "${CMAKE_CURRENT_LIST_DIR}/main.cpp")
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target_link_libraries(example_glfw_opengl3 PUBLIC
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imgui-glfw
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imgui-opengl3
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)
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if(WIN32)
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get_target_property(GLFW3_BUILD_TYPE glfw TYPE)
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if (GLFW3_BUILD_TYPE STREQUAL SHARED_LIBRARY)
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add_custom_command(TARGET example_glfw_opengl3 POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy_if_different
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$<TARGET_FILE:glfw>
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$<TARGET_FILE_DIR:example_glfw_opengl3>
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)
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endif()
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endif()

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