# - try to find glut library and include files
#  GLUT_INCLUDE_DIR, where to find GL/glut.h, etc.
#  GLUT_LIBRARIES, the libraries to link against
#  GLUT_FOUND, If false, do not try to use GLUT.
# Also defined, but not for general use are:
#  GLUT_glut_LIBRARY = the full path to the glut library.
#  GLUT_Xmu_LIBRARY  = the full path to the Xmu library.
#  GLUT_Xi_LIBRARY   = the full path to the Xi Library.

#=============================================================================
# Copyright 2001-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)

if (WIN32)
  find_path( GLUT_INCLUDE_DIR NAMES GL/glut.h
    PATHS  ${GLUT_ROOT_PATH}/include )
  find_library( GLUT_glut_LIBRARY NAMES glut glut32 freeglut
    PATHS
    ${OPENGL_LIBRARY_DIR}
    ${GLUT_ROOT_PATH}/Release
    )
else ()

  if (APPLE)
    # These values for Apple could probably do with improvement.
    find_path( GLUT_INCLUDE_DIR glut.h
      /System/Library/Frameworks/GLUT.framework/Versions/A/Headers
      ${OPENGL_LIBRARY_DIR}
      )
    set(GLUT_glut_LIBRARY "-framework GLUT" CACHE STRING "GLUT library for OSX")
    set(GLUT_cocoa_LIBRARY "-framework Cocoa" CACHE STRING "Cocoa framework for OSX")
  else ()

    if (BEOS)

      set(_GLUT_INC_DIR /boot/develop/headers/os/opengl)
      set(_GLUT_glut_LIB_DIR /boot/develop/lib/x86)

    else()

      find_library( GLUT_Xi_LIBRARY Xi
        /usr/openwin/lib
        )

      find_library( GLUT_Xmu_LIBRARY Xmu
        /usr/openwin/lib
        )

    endif ()

    find_path( GLUT_INCLUDE_DIR GL/glut.h
      /usr/include/GL
      /usr/openwin/share/include
      /usr/openwin/include
      /opt/graphics/OpenGL/include
      /opt/graphics/OpenGL/contrib/libglut
      ${_GLUT_INC_DIR}
      )

    find_library( GLUT_glut_LIBRARY glut
      /usr/openwin/lib
      ${_GLUT_glut_LIB_DIR}
      )

    unset(_GLUT_INC_DIR)
    unset(_GLUT_glut_LIB_DIR)

  endif ()

endif ()

include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GLUT REQUIRED_VARS GLUT_glut_LIBRARY GLUT_INCLUDE_DIR)

if (GLUT_FOUND)
  # Is -lXi and -lXmu required on all platforms that have it?
  # If not, we need some way to figure out what platform we are on.
  set( GLUT_LIBRARIES
    ${GLUT_glut_LIBRARY}
    ${GLUT_Xmu_LIBRARY}
    ${GLUT_Xi_LIBRARY}
    ${GLUT_cocoa_LIBRARY}
    )

  #The following deprecated settings are for backwards compatibility with CMake1.4
  set (GLUT_LIBRARY ${GLUT_LIBRARIES})
  set (GLUT_INCLUDE_PATH ${GLUT_INCLUDE_DIR})
endif()

mark_as_advanced(
  GLUT_INCLUDE_DIR
  GLUT_glut_LIBRARY
  GLUT_Xmu_LIBRARY
  GLUT_Xi_LIBRARY
  )