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# - Try to find OpenGL
# Once done this will define
#
# OPENGL_FOUND - system has OpenGL
# OPENGL_XMESA_FOUND - system has XMESA
# OPENGL_GLU_FOUND - system has GLU
# OPENGL_INCLUDE_DIR - the GL include directory
# OPENGL_LIBRARIES - Link these to use OpenGL and GLU
#
# If you want to use just GL you can use these values
# OPENGL_gl_LIBRARY - Path to OpenGL Library
# OPENGL_glu_LIBRARY - Path to GLU Library
#
# 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
IF (WIN32)
IF (CYGWIN)
FIND_PATH(OPENGL_INCLUDE_DIR GL/gl.h )
FIND_LIBRARY(OPENGL_gl_LIBRARY opengl32 )
FIND_LIBRARY(OPENGL_glu_LIBRARY glu32 )
ELSE (CYGWIN)
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(BORLAND)
SET (OPENGL_gl_LIBRARY opengl32 CACHE STRING "OpenGL library for win32")
SET (OPENGL_glu_LIBRARY glu32 CACHE STRING "GLU library for win32")
ENDIF(BORLAND)
ENDIF (CYGWIN)
ELSE (WIN32)
IF (APPLE)
FIND_LIBRARY(OPENGL_gl_LIBRARY OpenGL DOC "OpenGL lib for OSX")
FIND_LIBRARY(OPENGL_glu_LIBRARY AGL DOC "AGL lib for OSX")
FIND_PATH(OPENGL_INCLUDE_DIR OpenGL/gl.h DOC "Include for OpenGL on OSX")
ELSE(APPLE)
# 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(HPUX_IA_OPENGL_LIB_PATH /opt/graphics/OpenGL/lib/hpux32/)
ELSE(CMAKE_SIZEOF_VOID_P EQUAL 4)
SET(HPUX_IA_OPENGL_LIB_PATH /opt/graphics/OpenGL/lib/hpux64/)
ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 4)
# 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
)
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
${HPUX_IA_OPENGL_LIB_PATH}
)
# On Unix OpenGL most certainly always requires X11.
# Feel free to tighten up these conditions if you don't
# think this is always true.
# It's not true on OSX.
IF (OPENGL_gl_LIBRARY)
IF(NOT X11_FOUND)
INCLUDE(FindX11)
ENDIF(NOT X11_FOUND)
IF (X11_FOUND)
IF (NOT APPLE)
SET (OPENGL_LIBRARIES ${X11_LIBRARIES})
ENDIF (NOT APPLE)
ENDIF (X11_FOUND)
ENDIF (OPENGL_gl_LIBRARY)
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(APPLE)
ENDIF (WIN32)
SET( OPENGL_FOUND "NO" )
IF(OPENGL_gl_LIBRARY)
IF(OPENGL_xmesa_INCLUDE_DIR)
SET( OPENGL_XMESA_FOUND "YES" )
ELSE(OPENGL_xmesa_INCLUDE_DIR)
SET( OPENGL_XMESA_FOUND "NO" )
ENDIF(OPENGL_xmesa_INCLUDE_DIR)
SET( OPENGL_LIBRARIES ${OPENGL_gl_LIBRARY} ${OPENGL_LIBRARIES})
IF(OPENGL_glu_LIBRARY)
SET( OPENGL_GLU_FOUND "YES" )
SET( OPENGL_LIBRARIES ${OPENGL_glu_LIBRARY} ${OPENGL_LIBRARIES} )
ELSE(OPENGL_glu_LIBRARY)
SET( OPENGL_GLU_FOUND "NO" )
ENDIF(OPENGL_glu_LIBRARY)
SET( OPENGL_FOUND "YES" )
# This deprecated setting is for backward compatibility with CMake1.4
SET (OPENGL_LIBRARY ${OPENGL_LIBRARIES})
ENDIF(OPENGL_gl_LIBRARY)
# This deprecated setting is for backward compatibility with CMake1.4
SET(OPENGL_INCLUDE_PATH ${OPENGL_INCLUDE_DIR})
MARK_AS_ADVANCED(
OPENGL_INCLUDE_DIR
OPENGL_xmesa_INCLUDE_DIR
OPENGL_glu_LIBRARY
OPENGL_gl_LIBRARY
)
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