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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindOpenGL
# ----------
#
# FindModule for OpenGL and GLU.
#
# IMPORTED Targets
# ^^^^^^^^^^^^^^^^
#
# This module defines the :prop_tgt:`IMPORTED` targets:
#
# ``OpenGL::GL``
# Defined if the system has OpenGL.
# ``OpenGL::GLU``
# Defined if the system has GLU.
#
# Result Variables
# ^^^^^^^^^^^^^^^^
#
# This module sets the following variables:
#
# ``OPENGL_FOUND``
# True, if the system has OpenGL.
# ``OPENGL_XMESA_FOUND``
# True, if the system has XMESA.
# ``OPENGL_GLU_FOUND``
# True, if the system has GLU.
# ``OPENGL_INCLUDE_DIR``
# Path to the OpenGL include directory.
# ``OPENGL_LIBRARIES``
# Paths to the OpenGL and GLU libraries.
#
# If you want to use just GL you can use these values:
#
# ``OPENGL_gl_LIBRARY``
# Path to the OpenGL library.
# ``OPENGL_glu_LIBRARY``
# Path to the GLU library.
#
# OSX Specific
# ^^^^^^^^^^^^
#
# On OSX default to using the framework version of OpenGL. People will
# have to change the cache values of OPENGL_glu_LIBRARY and
# OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX.
set(_OpenGL_REQUIRED_VARS OPENGL_gl_LIBRARY)
if (CYGWIN)
find_path(OPENGL_INCLUDE_DIR GL/gl.h )
list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)
find_library(OPENGL_gl_LIBRARY opengl32 )
find_library(OPENGL_glu_LIBRARY glu32 )
elseif (WIN32)
if(BORLAND)
set (OPENGL_gl_LIBRARY import32 CACHE STRING "OpenGL library for win32")
set (OPENGL_glu_LIBRARY import32 CACHE STRING "GLU library for win32")
else()
set (OPENGL_gl_LIBRARY opengl32 CACHE STRING "OpenGL library for win32")
set (OPENGL_glu_LIBRARY glu32 CACHE STRING "GLU library for win32")
endif()
elseif (APPLE)
# The OpenGL.framework provides both gl and glu
find_library(OPENGL_gl_LIBRARY OpenGL DOC "OpenGL library for OS X")
find_library(OPENGL_glu_LIBRARY OpenGL DOC
"GLU library for OS X (usually same as OpenGL library)")
find_path(OPENGL_INCLUDE_DIR OpenGL/gl.h DOC "Include for OpenGL on OS X")
list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)
else()
if (CMAKE_SYSTEM_NAME MATCHES "HP-UX")
# Handle HP-UX cases where we only want to find OpenGL in either hpux64
# or hpux32 depending on if we're doing a 64 bit build.
if(CMAKE_SIZEOF_VOID_P EQUAL 4)
set(_OPENGL_LIB_PATH
/opt/graphics/OpenGL/lib/hpux32/)
else()
set(_OPENGL_LIB_PATH
/opt/graphics/OpenGL/lib/hpux64/
/opt/graphics/OpenGL/lib/pa20_64)
endif()
elseif(CMAKE_SYSTEM_NAME STREQUAL Haiku)
set(_OPENGL_LIB_PATH
/boot/develop/lib/x86)
set(_OPENGL_INCLUDE_PATH
/boot/develop/headers/os/opengl)
endif()
# The first line below is to make sure that the proper headers
# are used on a Linux machine with the NVidia drivers installed.
# They replace Mesa with NVidia's own library but normally do not
# install headers and that causes the linking to
# fail since the compiler finds the Mesa headers but NVidia's library.
# Make sure the NVIDIA directory comes BEFORE the others.
# - Atanas Georgiev <atanas@cs.columbia.edu>
find_path(OPENGL_INCLUDE_DIR GL/gl.h
/usr/share/doc/NVIDIA_GLX-1.0/include
/usr/openwin/share/include
/opt/graphics/OpenGL/include /usr/X11R6/include
${_OPENGL_INCLUDE_PATH}
)
list(APPEND _OpenGL_REQUIRED_VARS OPENGL_INCLUDE_DIR)
find_path(OPENGL_xmesa_INCLUDE_DIR GL/xmesa.h
/usr/share/doc/NVIDIA_GLX-1.0/include
/usr/openwin/share/include
/opt/graphics/OpenGL/include /usr/X11R6/include
)
find_library(OPENGL_gl_LIBRARY
NAMES GL MesaGL
PATHS /opt/graphics/OpenGL/lib
/usr/openwin/lib
/usr/shlib /usr/X11R6/lib
${_OPENGL_LIB_PATH}
)
unset(_OPENGL_INCLUDE_PATH)
unset(_OPENGL_LIB_PATH)
find_library(OPENGL_glu_LIBRARY
NAMES GLU MesaGLU
PATHS ${OPENGL_gl_LIBRARY}
/opt/graphics/OpenGL/lib
/usr/openwin/lib
/usr/shlib /usr/X11R6/lib
)
endif ()
if(OPENGL_gl_LIBRARY)
if(OPENGL_xmesa_INCLUDE_DIR)
set( OPENGL_XMESA_FOUND "YES" )
else()
set( OPENGL_XMESA_FOUND "NO" )
endif()
set( OPENGL_LIBRARIES ${OPENGL_gl_LIBRARY} ${OPENGL_LIBRARIES})
if(OPENGL_glu_LIBRARY)
set( OPENGL_GLU_FOUND "YES" )
if(NOT "${OPENGL_glu_LIBRARY}" STREQUAL "${OPENGL_gl_LIBRARY}")
set( OPENGL_LIBRARIES ${OPENGL_glu_LIBRARY} ${OPENGL_LIBRARIES} )
endif()
else()
set( OPENGL_GLU_FOUND "NO" )
endif()
# This deprecated setting is for backward compatibility with CMake1.4
set (OPENGL_LIBRARY ${OPENGL_LIBRARIES})
endif()
# This deprecated setting is for backward compatibility with CMake1.4
set(OPENGL_INCLUDE_PATH ${OPENGL_INCLUDE_DIR})
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenGL REQUIRED_VARS ${_OpenGL_REQUIRED_VARS})
unset(_OpenGL_REQUIRED_VARS)
# OpenGL:: targets
if(OPENGL_FOUND)
if(NOT TARGET OpenGL::GL)
if(IS_ABSOLUTE "${OPENGL_gl_LIBRARY}")
add_library(OpenGL::GL UNKNOWN IMPORTED)
if(OPENGL_gl_LIBRARY MATCHES "/([^/]+)\\.framework$")
set(_gl_fw "${OPENGL_gl_LIBRARY}/${CMAKE_MATCH_1}")
if(EXISTS "${_gl_fw}.tbd")
string(APPEND _gl_fw ".tbd")
endif()
set_target_properties(OpenGL::GL PROPERTIES
IMPORTED_LOCATION "${_gl_fw}")
else()
set_target_properties(OpenGL::GL PROPERTIES
IMPORTED_LOCATION "${OPENGL_gl_LIBRARY}")
endif()
else()
add_library(OpenGL::GL INTERFACE IMPORTED)
set_target_properties(OpenGL::GL PROPERTIES
IMPORTED_LIBNAME "${OPENGL_gl_LIBRARY}")
endif()
set_target_properties(OpenGL::GL PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${OPENGL_INCLUDE_DIR}")
endif()
if(OPENGL_GLU_FOUND AND NOT TARGET OpenGL::GLU)
if(IS_ABSOLUTE "${OPENGL_glu_LIBRARY}")
add_library(OpenGL::GLU UNKNOWN IMPORTED)
if(OPENGL_glu_LIBRARY MATCHES "/([^/]+)\\.framework$")
set(_glu_fw "${OPENGL_glu_LIBRARY}/${CMAKE_MATCH_1}")
if(EXISTS "${_glu_fw}.tbd")
string(APPEND _glu_fw ".tbd")
endif()
set_target_properties(OpenGL::GLU PROPERTIES
IMPORTED_LOCATION "${_glu_fw}")
else()
set_target_properties(OpenGL::GLU PROPERTIES
IMPORTED_LOCATION "${OPENGL_glu_LIBRARY}")
endif()
else()
add_library(OpenGL::GLU INTERFACE IMPORTED)
set_target_properties(OpenGL::GLU PROPERTIES
IMPORTED_LIBNAME "${OPENGL_glu_LIBRARY}")
endif()
set_target_properties(OpenGL::GLU PROPERTIES
INTERFACE_LINK_LIBRARIES OpenGL::GL)
endif()
endif()
mark_as_advanced(
OPENGL_INCLUDE_DIR
OPENGL_xmesa_INCLUDE_DIR
OPENGL_glu_LIBRARY
OPENGL_gl_LIBRARY
)
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