#
# Try to find GLEW library and include path.
# Once done this will define
#
# GLEW_FOUND
# GLEW_INCLUDE_DIRS
# GLEW_LIBRARY
# 

#  Created on 2/6/2014 by Stephen Birarda
#
# Adapted from FindGLEW.cmake available in the nvidia-texture-tools repository
# (https://code.google.com/p/nvidia-texture-tools/source/browse/trunk/cmake/FindGLEW.cmake?r=96)

if (GLEW_INCLUDE_DIRS AND GLEW_LIBRARY)
  set(GLEW_FOUND TRUE)
else ()
  if (WIN32)
    set(WIN_GLEW_SEARCH_DIRS "${GLEW_ROOT_DIR}" "$ENV{GLEW_ROOT_DIR}" "$ENV{HIFI_LIB_DIR}/glew")
       
  	find_path(GLEW_INCLUDE_DIRS include/GL/glew.h HINTS ${WIN_GLEW_SEARCH_DIRS})
  
    if (CMAKE_CL_64)
      set(WIN_ARCH_DIR "x64")
    else()
      set(WIN_ARCH_DIR "Win32")
    endif()
	
  	find_library(GLEW_LIBRARY "lib/Release/${WIN_ARCH_DIR}/glew32s.lib" HINTS ${WIN_GLEW_SEARCH_DIRS})
  endif ()

  include(FindPackageHandleStandardArgs)
  find_package_handle_standard_args(GLEW DEFAULT_MSG GLEW_INCLUDE_DIRS GLEW_LIBRARY)
  
  if (GLEW_FOUND)
    if (NOT GLEW_FIND_QUIETLY)
      message(STATUS "Found GLEW: ${GLEW_LIBRARY}")
    endif ()
  else ()
    if (GLEW_FIND_REQUIRED)
      message(FATAL_ERROR "Could not find GLEW")
    endif ()
  endif ()
  
  # show the GLEW_INCLUDE_DIRS and GLEW_LIBRARY variables only in the advanced view
  mark_as_advanced(GLEW_INCLUDE_DIRS GLEW_LIBRARY)
endif ()