# Find NvidiaCg
#
# This module defines
#  NvidiaCg_FOUND
#  NvidiaCg_INCLUDE_DIRS
#  NvidiaCg_LIBRARIES
#
# Copyright (c) 2012 I-maginer
# 
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA, or go to
# http://www.gnu.org/copyleft/lesser.txt
#

# On a new cmake run, we do not need to be verbose
IF(NvidiaCg_INCLUDE_DIR AND NvidiaCg_LIBRARY)
	SET(NvidiaCg_FIND_QUIETLY TRUE)
ENDIF()

# If CG_INC_PATH was defined in the environment, use it.
if (NOT "$ENV{CG_INC_PATH}" STREQUAL "")
  set(NvidiaCg_INCLUDE_SEARCH_DIRS $ENV{CG_INC_PATH})
endif()

# If CG_LIB_PATH was defined in the environment, use it.
if (NOT "$ENV{CG_LIB_PATH}" STREQUAL "")
  set(NvidiaCg_LIBRARY_SEARCH_DIRS $ENV{CG_LIB_PATH})
endif()

# log message
IF (NOT NvidiaCg_FIND_QUIETLY)
	MESSAGE(STATUS "Checking for Nvidia Cg SDK")
ENDIF()

# Search for header files
FIND_PATH(NvidiaCg_INCLUDE_DIR Cg/cgGL.h
  PATHS ${NvidiaCg_INCLUDE_SEARCH_DIRS})

# Search for libraries files
FIND_LIBRARY(NvidiaCg_LIBRARY cg
  PATHS ${NvidiaCg_LIBRARY_SEARCH_DIRS})
FIND_LIBRARY(NvidiaCgGL_LIBRARY cgGL
  PATHS ${NvidiaCg_LIBRARY_SEARCH_DIRS})

# Configure libraries
SET(NvidiaCg_INCLUDE_DIRS ${NvidiaCg_INCLUDE_DIR} CACHE STRING "Directory containing Nvidia Cg SDK header files")
SET(NvidiaCg_LIBRARIES ${NvidiaCg_LIBRARY} ${NvidiaCgGL_LIBRARY} CACHE STRING "Nvidia Cg SDK libraries files")

# Hide those variables in GUI
SET(NvidiaCg_INCLUDE_DIR ${NvidiaCg_INCLUDE_DIR} CACHE INTERNAL "")
SET(NvidiaCg_LIBRARY ${NvidiaCg_LIBRARY} CACHE INTERNAL "")
SET(NvidiaCgGL_LIBRARY ${NvidiaCgGL_LIBRARY} CACHE INTERNAL "")

IF(NvidiaCg_INCLUDE_DIRS AND NvidiaCg_LIBRARY AND NvidiaCgGL_LIBRARY)
	SET(NvidiaCg_FOUND TRUE)
ENDIF()

# log find result
IF(NvidiaCg_FOUND)
	IF(NOT NvidiaCg_FIND_QUIETLY)
		MESSAGE(STATUS "  libraries: ${NvidiaCg_LIBRARIES}")
		MESSAGE(STATUS "  includes: ${NvidiaCg_INCLUDE_DIRS}")
	ENDIF()
ELSE(NvidiaCg_FOUND)
	IF(NOT NvidiaCg_LIBRARIES)
		MESSAGE(STATUS, "NvidiaCg SDK library files could not be found")
	ENDIF()
	IF(NOT NvidiaCg_INCLUDE_DIRS)
		MESSAGE(STATUS "NvidiaCg SDK include files could not be found")
	ENDIF()
ENDIF(NvidiaCg_FOUND)