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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
# We can't create the same interface imported target multiple times, CMake will complain if we do
# that. This can happen if the find_package call is done in multiple different subdirectories.
if(TARGET WrapOpenGL::WrapOpenGL)
set(WrapOpenGL_FOUND ON)
return()
endif()
set(WrapOpenGL_FOUND OFF)
find_package(OpenGL ${WrapOpenGL_FIND_VERSION})
if (OpenGL_FOUND)
set(WrapOpenGL_FOUND ON)
add_library(WrapOpenGL::WrapOpenGL INTERFACE IMPORTED)
if(APPLE)
# CMake 3.27 and older:
# On Darwin platforms FindOpenGL sets IMPORTED_LOCATION to the absolute path of the library
# within the framework. This ends up as an absolute path link flag, which we don't want,
# because that makes our .prl files un-relocatable.
# Extract the framework path instead, and use that in INTERFACE_LINK_LIBRARIES,
# which CMake ends up transforming into a relocatable -framework flag.
# See https://gitlab.kitware.com/cmake/cmake/-/issues/20871 for details.
#
# CMake 3.28 and above:
# IMPORTED_LOCATION is the absolute path the the OpenGL.framework folder.
get_target_property(__opengl_fw_lib_path OpenGL::GL IMPORTED_LOCATION)
if(__opengl_fw_lib_path AND NOT __opengl_fw_lib_path MATCHES "/([^/]+)\\.framework$")
get_filename_component(__opengl_fw_path "${__opengl_fw_lib_path}" DIRECTORY)
endif()
if(NOT __opengl_fw_path)
# Just a safety measure in case if no OpenGL::GL target exists.
set(__opengl_fw_path "-framework OpenGL")
endif()
find_library(WrapOpenGL_AGL NAMES AGL)
if(WrapOpenGL_AGL)
set(__opengl_agl_fw_path "${WrapOpenGL_AGL}")
endif()
if(NOT __opengl_agl_fw_path)
set(__opengl_agl_fw_path "-framework AGL")
endif()
target_link_libraries(WrapOpenGL::WrapOpenGL INTERFACE ${__opengl_fw_path})
target_link_libraries(WrapOpenGL::WrapOpenGL INTERFACE ${__opengl_agl_fw_path})
else()
target_link_libraries(WrapOpenGL::WrapOpenGL INTERFACE OpenGL::GL)
endif()
elseif(UNIX AND NOT APPLE AND NOT CMAKE_SYSTEM_NAME STREQUAL "Integrity")
# Requesting only the OpenGL component ensures CMake does not mark the package as
# not found if neither GLX nor libGL are available. This allows finding OpenGL
# on an X11-less Linux system.
find_package(OpenGL ${WrapOpenGL_FIND_VERSION} COMPONENTS OpenGL)
if (OpenGL_FOUND)
set(WrapOpenGL_FOUND ON)
add_library(WrapOpenGL::WrapOpenGL INTERFACE IMPORTED)
target_link_libraries(WrapOpenGL::WrapOpenGL INTERFACE OpenGL::OpenGL)
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(WrapOpenGL DEFAULT_MSG WrapOpenGL_FOUND)
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