232 lines
9.8 KiB
CMake
232 lines
9.8 KiB
CMake
#.rst:
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# Find ImGui
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# -------------
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#
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# Finds the ImGui library. This module defines:
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#
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# ImGui_FOUND - True if ImGui is found
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# ImGui::ImGui - ImGui interface target
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# ImGui::Sources - ImGui source target for core functionality
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# ImGui::SourcesMiscCpp - ImGui source target for misc/cpp
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#
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# Additionally these variables are defined for internal usage:
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#
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# ImGui_INCLUDE_DIR - Include dir
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#
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# The find module first tries to find ``imgui`` via a CMake config file (which
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# is distributed this way via Vcpkg, for example). If that's found, the
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# ``ImGui::ImGui`` target is an alias to it and the ``ImGui::Sources`` target
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# is empty except for having ``ImGui::ImGui`` as a dependency.
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#
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# If ``imgui`` is not found, as a fallback it tries to find the C++ sources.
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# You can supply their location via an ``IMGUI_DIR`` variable. Once found, the
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# ``ImGui::ImGui`` target contains just the header file, while
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# ``ImGui::Sources`` contains the source files in ``INTERFACE_SOURCES``.
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#
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# The ``ImGui::SourcesMiscCpp`` component, if requested, is always searched for
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# in the form of C++ sources. Vcpkg doesn't distribute these.
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#
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# The desired usage that covers both cases is to link ``ImGui::Sources``
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# ``PRIVATE``\ ly to a *single* target, which will then contain either the
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# sources or be linked to the imgui library from Vcpkg; and linking
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# ``ImGui::ImGui`` to this target ``PUBLIC``\ ly.
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#
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#
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# This file is part of Magnum.
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#
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# Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
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# 2020, 2021, 2022 Vladimír Vondruš <mosra@centrum.cz>
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# Copyright © 2018 Jonathan Hale <squareys@googlemail.com>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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#
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# In 1.71 ImGui depends on the ApplicationServices framework for macOS
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# clipboard support. Since 1.72 the dependency is optional and used only if
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# IMGUI_ENABLE_OSX_DEFAULT_CLIPBOARD_FUNCTIONS is enabled, but link to it
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# always to be nice to users.
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if(CORRADE_TARGET_APPLE)
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find_library(_IMGUI_ApplicationServices_LIBRARY ApplicationServices)
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mark_as_advanced(_IMGUI_ApplicationServices_LIBRARY)
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set(_IMGUI_EXTRA_LIBRARIES ${_IMGUI_ApplicationServices_LIBRARY})
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# Since 1.82, ImGui on MinGW needs the imm32 library. For MSVC the library
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# seems to be linked implicitly so this is not needed.
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elseif(CORRADE_TARGET_WINDOWS AND CORRADE_TARGET_MINGW)
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set(_IMGUI_EXTRA_LIBRARIES imm32)
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endif()
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# Vcpkg distributes imgui as a library with a config file, so try that first --
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# but only if IMGUI_DIR wasn't explicitly passed, in which case we'll look
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# there instead
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if(NOT IMGUI_DIR AND NOT TARGET imgui::imgui)
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find_package(imgui CONFIG QUIET)
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endif()
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if(NOT IMGUI_DIR AND TARGET imgui::imgui)
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if(NOT TARGET ImGui::ImGui)
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add_library(ImGui::ImGui INTERFACE IMPORTED)
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set_property(TARGET ImGui::ImGui APPEND PROPERTY
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INTERFACE_LINK_LIBRARIES imgui::imgui ${_IMGUI_EXTRA_LIBRARIES})
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# Retrieve include directory for FindPackageHandleStandardArgs later
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get_target_property(ImGui_INCLUDE_DIR imgui::imgui
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INTERFACE_INCLUDE_DIRECTORIES)
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add_library(ImGui::Sources INTERFACE IMPORTED)
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set_property(TARGET ImGui::Sources APPEND PROPERTY
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INTERFACE_LINK_LIBRARIES ImGui::ImGui)
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endif()
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# Otherwise find the source files and compile them as part of the library they
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# get linked to
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else()
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# Disable the find root path here, it overrides the
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# CMAKE_FIND_ROOT_PATH_MODE_INCLUDE setting potentially set in
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# toolchains.
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find_path(ImGui_INCLUDE_DIR NAMES imgui.h
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HINTS ${IMGUI_DIR}
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PATH_SUFFIXES MagnumExternal/ImGui
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NO_CMAKE_FIND_ROOT_PATH)
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mark_as_advanced(ImGui_INCLUDE_DIR)
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if(NOT TARGET ImGui::ImGui)
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add_library(ImGui::ImGui INTERFACE IMPORTED)
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set_property(TARGET ImGui::ImGui APPEND PROPERTY
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INTERFACE_INCLUDE_DIRECTORIES ${ImGui_INCLUDE_DIR})
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if(_IMGUI_EXTRA_LIBRARIES)
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set_property(TARGET ImGui::ImGui APPEND PROPERTY
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INTERFACE_LINK_LIBRARIES ${_IMGUI_EXTRA_LIBRARIES})
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endif()
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# Handle export and import of imgui symbols via IMGUI_API definition
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# in visibility.h of Magnum ImGuiIntegration.
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set_property(TARGET ImGui::ImGui APPEND PROPERTY INTERFACE_COMPILE_DEFINITIONS
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"IMGUI_USER_CONFIG=\"Magnum/ImGuiIntegration/visibility.h\"")
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endif()
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endif()
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macro(_imgui_setup_source_file source_var)
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# Handle export and import of imgui symbols via IMGUI_API
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# definition in visibility.h of Magnum ImGuiIntegration.
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set_property(SOURCE ${${source_var}} APPEND PROPERTY COMPILE_DEFINITIONS
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"IMGUI_USER_CONFIG=\"Magnum/ImGuiIntegration/visibility.h\"")
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# Hide warnings from imgui source files
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# GCC- and Clang-specific flags
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if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR (CMAKE_CXX_COMPILER_ID MATCHES "(Apple)?Clang"
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AND NOT CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC") OR CORRADE_TARGET_EMSCRIPTEN)
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set_property(SOURCE ${${source_var}} APPEND_STRING PROPERTY COMPILE_FLAGS
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" -Wno-old-style-cast")
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endif()
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# GCC-specific flags
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if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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set_property(SOURCE ${${source_var}} APPEND_STRING PROPERTY COMPILE_FLAGS
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" -Wno-double-promotion -Wno-zero-as-null-pointer-constant")
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endif()
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mark_as_advanced(${source_var})
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endmacro()
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# Find components
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foreach(_component IN LISTS ImGui_FIND_COMPONENTS)
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if(_component STREQUAL "Sources")
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if(NOT TARGET ImGui::Sources)
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set(ImGui_Sources_FOUND TRUE)
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set(ImGui_SOURCES )
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foreach(_file imgui imgui_widgets imgui_draw imgui_demo)
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# Disable the find root path here, it overrides the
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# CMAKE_FIND_ROOT_PATH_MODE_INCLUDE setting potentially set in
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# toolchains.
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find_file(ImGui_${_file}_SOURCE NAMES ${_file}.cpp
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HINTS ${IMGUI_DIR} NO_CMAKE_FIND_ROOT_PATH)
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if(NOT ImGui_${_file}_SOURCE)
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set(ImGui_Sources_FOUND FALSE)
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break()
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endif()
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list(APPEND ImGui_SOURCES ${ImGui_${_file}_SOURCE})
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_imgui_setup_source_file(ImGui_${_file}_SOURCE)
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endforeach()
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# Files not present in all ImGui versions, treat them as optional
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# and do nothing if not found.
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# - imgui_tables added in https://github.com/ocornut/imgui/commit/9874077fc0e364383ef997e3d4332172bfddc0b9
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foreach(_file imgui_tables)
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# Disable the find root path here, it overrides the
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# CMAKE_FIND_ROOT_PATH_MODE_INCLUDE setting potentially set in
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# toolchains.
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find_file(ImGui_${_file}_SOURCE NAMES ${_file}.cpp
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HINTS ${IMGUI_DIR} NO_CMAKE_FIND_ROOT_PATH)
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if(NOT ImGui_${_file}_SOURCE)
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mark_as_advanced(ImGui_${_file}_SOURCE)
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continue()
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endif()
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list(APPEND ImGui_SOURCES ${ImGui_${_file}_SOURCE})
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_imgui_setup_source_file(ImGui_${_file}_SOURCE)
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endforeach()
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add_library(ImGui::Sources INTERFACE IMPORTED)
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set_property(TARGET ImGui::Sources APPEND PROPERTY
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INTERFACE_SOURCES "${ImGui_SOURCES}")
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set_property(TARGET ImGui::Sources APPEND PROPERTY
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INTERFACE_LINK_LIBRARIES ImGui::ImGui)
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else()
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set(ImGui_Sources_FOUND TRUE)
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endif()
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elseif(_component STREQUAL "SourcesMiscCpp")
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set(ImGui_SourcesMiscCpp_FOUND TRUE)
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set(ImGui_MISC_CPP_SOURCES )
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foreach(_file imgui_stdlib)
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# Disable the find root path here, it overrides the
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# CMAKE_FIND_ROOT_PATH_MODE_INCLUDE setting potentially set in
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# toolchains.
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find_file(ImGui_${_file}_MISC_CPP_SOURCE NAMES ${_file}.cpp
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HINTS ${IMGUI_DIR}/misc/cpp NO_CMAKE_FIND_ROOT_PATH)
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list(APPEND ImGui_MISC_CPP_SOURCES ${ImGui_${_file}_MISC_CPP_SOURCE})
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if(NOT ImGui_${_file}_MISC_CPP_SOURCE)
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set(ImGui_SourcesMiscCpp_FOUND FALSE)
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break()
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endif()
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_imgui_setup_source_file(ImGui_${_file}_MISC_CPP_SOURCE)
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endforeach()
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if(NOT TARGET ImGui::SourcesMiscCpp)
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add_library(ImGui::SourcesMiscCpp INTERFACE IMPORTED)
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set_property(TARGET ImGui::SourcesMiscCpp APPEND PROPERTY
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INTERFACE_SOURCES "${ImGui_MISC_CPP_SOURCES}")
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set_property(TARGET ImGui::SourcesMiscCpp APPEND PROPERTY
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INTERFACE_LINK_LIBRARIES ImGui::ImGui)
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endif()
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endif()
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endforeach()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(ImGui
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REQUIRED_VARS ImGui_INCLUDE_DIR HANDLE_COMPONENTS)
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