###########################################################################
# Precompiled libraries tips and hints, for find_package().

if(CYCLES_STANDALONE_REPOSITORY)
  if(APPLE OR WIN32)
    include(precompiled_libs)
  endif()
endif()

###########################################################################
# GLUT

if(WITH_CYCLES_STANDALONE AND WITH_CYCLES_STANDALONE_GUI)
  set(GLUT_ROOT_PATH ${CYCLES_GLUT})

  find_package(GLUT)
  message(STATUS "GLUT_FOUND=${GLUT_FOUND}")

  include_directories(
    SYSTEM
    ${GLUT_INCLUDE_DIR}
  )
endif()

###########################################################################
# GLEW

# Workaround for unconventional variable name use in Blender.
if(NOT CYCLES_STANDALONE_REPOSITORY)
  set(GLEW_INCLUDE_DIR "${GLEW_INCLUDE_PATH}")
endif()

if(WITH_CYCLES_STANDALONE AND WITH_CYCLES_STANDALONE_GUI)
  set(CYCLES_APP_GLEW_LIBRARY ${BLENDER_GLEW_LIBRARIES})
endif()

###########################################################################
# CUDA

if(WITH_CYCLES_CUDA_BINARIES OR NOT WITH_CUDA_DYNLOAD)
  find_package(CUDA) # Try to auto locate CUDA toolkit
  if(CUDA_FOUND)
    message(STATUS "CUDA nvcc = ${CUDA_NVCC_EXECUTABLE}")
  else()
    message(STATUS "CUDA compiler not found, disabling WITH_CYCLES_CUDA_BINARIES")
    set(WITH_CYCLES_CUDA_BINARIES OFF)
    if(NOT WITH_CUDA_DYNLOAD)
      message(STATUS "Additionally falling back to dynamic CUDA load")
      set(WITH_CUDA_DYNLOAD ON)
    endif()
  endif()
endif()

# Packages which are being found by Blender when building from inside Blender
# source code. but which we need to take care of when building Cycles from a
# standalone repository
if(CYCLES_STANDALONE_REPOSITORY)
  # PThreads
  # TODO(sergey): Bloody exception, handled in precompiled_libs.cmake.
  if(NOT WIN32)
    set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
    find_package(Threads REQUIRED)
    set(PTHREADS_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
  endif()

  ####
  # OpenGL

  # TODO(sergey): We currently re-use the same variable name as we use
  # in Blender. Ideally we need to make it CYCLES_GL_LIBRARIES.
  find_package(OpenGL REQUIRED)
  find_package(GLEW REQUIRED)
  list(APPEND BLENDER_GL_LIBRARIES
    "${OPENGL_gl_LIBRARY}"
    "${OPENGL_glu_LIBRARY}"
    "${GLEW_LIBRARY}"
  )

  ####
  # OpenImageIO
  find_package(OpenImageIO REQUIRED)
  if(OPENIMAGEIO_PUGIXML_FOUND)
    set(PUGIXML_INCLUDE_DIR "${OPENIMAGEIO_INCLUDE_DIR/OpenImageIO}")
    set(PUGIXML_LIBRARIES "")
  else()
    find_package(PugiXML REQUIRED)
  endif()

  # OIIO usually depends on OpenEXR, so find this library
  # but don't make it required.
  find_package(OpenEXR)

  ####
  # OpenShadingLanguage
  if(WITH_CYCLES_OSL)
    find_package(OpenShadingLanguage REQUIRED)
    find_package(LLVM REQUIRED)
  endif()

  ####
  # OpenColorIO
  if(WITH_OPENCOLORIO)
    find_package(OpenColorIO REQUIRED)
  endif()

  ####
  # Boost
  set(__boost_packages filesystem regex system thread date_time)
  if(WITH_CYCLES_NETWORK)
    list(APPEND __boost_packages serialization)
  endif()
  if(WITH_CYCLES_OSL)
    # TODO(sergey): This is because of the way how our precompiled
    # libraries works, could be different for someone's else libs..
    if(APPLE OR MSVC)
      list(APPEND __boost_packages wave)
    elseif(NOT (${OSL_LIBRARY_VERSION_MAJOR} EQUAL "1" AND ${OSL_LIBRARY_VERSION_MINOR} LESS "6"))
      list(APPEND __boost_packages wave)
    endif()
  endif()
  find_package(Boost 1.48 COMPONENTS ${__boost_packages} REQUIRED)
  if(NOT Boost_FOUND)
    # Try to find non-multithreaded if -mt not found, this flag
    # doesn't matter for us, it has nothing to do with thread
    # safety, but keep it to not disturb build setups.
    set(Boost_USE_MULTITHREADED OFF)
    find_package(Boost 1.48 COMPONENTS ${__boost_packages})
  endif()
  unset(__boost_packages)
  set(BOOST_INCLUDE_DIR ${Boost_INCLUDE_DIRS})
  set(BOOST_LIBRARIES ${Boost_LIBRARIES})
  set(BOOST_LIBPATH ${Boost_LIBRARY_DIRS})
  set(BOOST_DEFINITIONS "-DBOOST_ALL_NO_LIB")

  ####
  # embree
  if(WITH_CYCLES_EMBREE)
    find_package(embree 3.2.4 REQUIRED)
  endif()

  ####
  # Logging
  if(WITH_CYCLES_LOGGING)
    find_package(Glog REQUIRED)
    find_package(Gflags REQUIRED)
  endif()

  ####
  # OpenSubdiv
  if(WITH_CYCLES_OPENSUBDIV)
    find_package(OpenSubdiv REQUIRED)
    set(WITH_OPENSUBDIV ON)
  endif()

  unset(_lib_DIR)
else()
  set(LLVM_LIBRARIES ${LLVM_LIBRARY})
endif()
