#
#   Copyright 2013 Pixar
#
#   Licensed under the Apache License, Version 2.0 (the "Apache License")
#   with the following modification; you may not use this file except in
#   compliance with the Apache License and the following modification to it:
#   Section 6. Trademarks. is deleted and replaced with:
#
#   6. Trademarks. This License does not grant permission to use the trade
#      names, trademarks, service marks, or product names of the Licensor
#      and its affiliates, except as required to comply with Section 4(c) of
#      the License and to reproduce the content of the NOTICE file.
#
#   You may obtain a copy of the Apache License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the Apache License with the above modification is
#   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#   KIND, either express or implied. See the Apache License for the specific
#   language governing permissions and limitations under the Apache License.
#

# - Try to find the IlmBase library
# Once done this will define
#
#  ILMBASE_FOUND - System has IlmBase
#  ILMBASE_INCLUDE_DIR - The include directory
#  ILMBASE_LIBRARIES - The libraries needed

IF(NOT DEFINED ILMBASE_LOCATION)
    IF ( ${CMAKE_HOST_UNIX} )
        IF( APPLE )
          # TODO: set to default install path when shipping out
          SET( ILMBASE_LOCATION NOTFOUND )
        ELSE()
          SET(ILMBASE_LOCATION /usr/local/ilmbase-1.0.1 )
        ENDIF()
    ELSE()
        IF ( WIN32 )
          # Note: This assumes that the Deploy directory has been copied
          #       back into the IlmBase root directory.
          SET( ILMBASE_LOCATION "$ENV{PROGRAMFILES}/ilmbase-1.0.1/Deploy" )
        ENDIF()
    ENDIF()
ENDIF()

IF ( ${CMAKE_HOST_UNIX} )
    SET(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -lpthread")
ELSE()
ENDIF()

SET(LIBRARY_PATHS
    "${ILMBASE_LOCATION}/lib"
    "${ILMBASE_LOCATION}/lib/Release"
    "${ILMBASE_LOCATION}/lib/x64/Release"
    "$ENV{ILMBASE_LOCATION}/lib"
    "$ENV{ILMBASE_LOCATION}/lib/Release"
    "$ENV{ILMBASE_LOCATION}/lib/x64/Release"
    ~/Library/Frameworks
    /Library/Frameworks
    /usr/local/lib
    /usr/lib
    /sw/lib
    /opt/local/lib
    /opt/csw/lib
    /opt/lib
    /usr/freeware/lib64
)

SET(INCLUDE_PATHS
    "${ILMBASE_LOCATION}/include/OpenEXR/"
    "${ILMBASE_LOCATION}/include"
    "$ENV{ILMBASE_LOCATION}/include/OpenEXR/"
    "$ENV{ILMBASE_LOCATION}/include"
    ~/Library/Frameworks
    /Library/Frameworks
    /usr/local/include/OpenEXR/
    /usr/local/include
    /usr/include
    /usr/include/OpenEXR
    /sw/include # Fink
    /opt/local/include # DarwinPorts
    /opt/csw/include # Blastwave
    /opt/include
    /usr/freeware/include
)


FIND_PATH( ILMBASE_INCLUDE_DIR 
        ImathMath.h
    PATHS
        "${INCLUDE_PATHS}"
    NO_DEFAULT_PATH
    NO_CMAKE_ENVIRONMENT_PATH
    NO_CMAKE_PATH
    NO_SYSTEM_ENVIRONMENT_PATH
    NO_CMAKE_SYSTEM_PATH
    DOC "The directory where ImathMath.h resides" )

FIND_LIBRARY( ILMBASE_IEX_LIB 
        Iex
    PATHS
        "${LIBRARY_PATHS}"
        NO_DEFAULT_PATH
        NO_CMAKE_ENVIRONMENT_PATH
        NO_CMAKE_PATH
        NO_SYSTEM_ENVIRONMENT_PATH
        NO_CMAKE_SYSTEM_PATH
        DOC "The Iex library" )

FIND_LIBRARY( ILMBASE_ILMTHREAD_LIB 
        IlmThread
    PATHS
        "${LIBRARY_PATHS}"
        NO_DEFAULT_PATH
        NO_CMAKE_ENVIRONMENT_PATH
        NO_CMAKE_PATH
        NO_SYSTEM_ENVIRONMENT_PATH
        NO_CMAKE_SYSTEM_PATH
        DOC "The IlmThread library" )

FIND_LIBRARY( ILMBASE_IMATH_LIB
        Imath
    PATHS
        "${LIBRARY_PATHS}"
        NO_DEFAULT_PATH
        NO_CMAKE_ENVIRONMENT_PATH
        NO_CMAKE_PATH
        NO_SYSTEM_ENVIRONMENT_PATH
        NO_CMAKE_SYSTEM_PATH
        DOC "The Imath library" )


IF ( ${ILMBASE_IEX_LIB} STREQUAL "ILMBASE_IEX_LIB-NOTFOUND" )
  MESSAGE( FATAL_ERROR "ilmbase libraries (Iex) not found, required: ILMBASE_LOCATION: ${ILMBASE_LOCATION}" )
ENDIF()

IF ( ${ILMBASE_ILMTHREAD_LIB} STREQUAL "ILMBASE_ILMTHREAD_LIB-NOTFOUND" )
  MESSAGE( FATAL_ERROR "ilmbase libraries (IlmThread) not found, required: ILMBASE_LOCATION: ${ILMBASE_LOCATION}" )
ENDIF()

IF ( ${ILMBASE_IMATH_LIB} STREQUAL "ILMBASE_IMATH_LIB-NOTFOUND" )
  MESSAGE( FATAL_ERROR "ilmbase libraries (Imath) not found, required: ILMBASE_LOCATION: ${ILMBASE_LOCATION}" )
ENDIF()

IF ( ${ILMBASE_INCLUDE_DIR} STREQUAL "ILMBASE_INCLUDE_DIR-NOTFOUND" )
  MESSAGE( FATAL_ERROR "ilmbase header files not found, required: ILMBASE_LOCATION: ${ILMBASE_LOCATION}" )
ENDIF()

SET( ILMBASE_LIBRARIES
    "${ILMBASE_IMATH_LIB}"
    "${ILMBASE_ILMTHREAD_LIB}"
    "${ILMBASE_IEX_LIB}"
)

INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(IlmBase DEFAULT_MSG
    ILMBASE_LOCATION
    ILMBASE_INCLUDE_DIR
    ILMBASE_LIBRARIES
)

SET( ILMBASE_FOUND TRUE )