#
#   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.
#

if( OPENGL_FOUND AND (GLEW_FOUND AND GLFW_FOUND) OR (APPLE AND GLFW_FOUND))

    add_subdirectory(common)
    
    add_subdirectory(glViewer)
    add_subdirectory(glBatchViewer)
    add_subdirectory(glStencilViewer)
    add_subdirectory(simpleCpu)
    add_subdirectory(limitEval)
    add_subdirectory(tessellateObjFile)
    add_subdirectory(uvViewer)

    if(OPENGL_4_3_FOUND AND (NOT APPLE))
        add_subdirectory(paintTest)
    endif()

    if(PTEX_FOUND)
        add_subdirectory(ptexViewer)
    endif()

else()

    set(MISSING "")

    if (NOT OPENGL_FOUND)
        list(APPEND MISSING OpenGL)
    endif()

    if (NOT GLEW_FOUND)
        list(APPEND MISSING glew)
    endif()

    if (NOT GLFW_FOUND)
        list(APPEND MISSING glfw)
    endif()

    message(WARNING
        "The following libraries could not be found : ${MISSING}.  "
        "The glViewer and ptexViewer examples will not be available.  "
        "If you have these libraries installed, please specify their "
        "path to cmake (through the GLEW_LOCATION and GLFW_LOCATION "
        "command line arguments or environment variables)."
    )
endif()

if(DXSDK_FOUND)

   add_subdirectory(dxViewer)

   if(PTEX_FOUND)
       add_subdirectory(dxPtexViewer)
   endif()

endif()


if(MAYA_FOUND)
    add_subdirectory(osdPolySmooth)

    # manuelk: the following plugins are disabled until further notice

    #add_subdirectory(mayaViewer)
    #if(PTEX_FOUND)
        #add_subdirectory(mayaPtexViewer)
    #endif()
endif()