#
#   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.
#


add_subdirectory(common)

if (NOT NO_OPENGL)
    if (OPENGL_FOUND AND (GLEW_FOUND AND GLFW_FOUND) OR (APPLE AND GLFW_FOUND))

        # optional dependency - enables screenshots in some examples
        find_package(PNG)
        if (PNG_FOUND)
            include_directories("${PNG_INCLUDE_DIRS}")
            list(APPEND PLATFORM_LIBRARIES "${PNG_LIBRARIES}")
            add_definitions(-DOPENSUBDIV_HAS_PNG)
        endif()


        add_subdirectory(glViewer)
        add_subdirectory(glEvalLimit)
        add_subdirectory(glShareTopology)
        add_subdirectory(glFVarViewer)
        add_subdirectory(glStencilViewer)

        if (CMAKE_COMPILER_IS_CLANGCC)
            # This code is intended for debugging only
            # and currently only compiles with Clang.
            add_subdirectory(vtrViewer)
        endif()

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

        if (PTEX_FOUND)
            add_subdirectory(glPtexViewer)
        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()
endif()

if (DXSDK_FOUND)

   add_subdirectory(dxViewer)

   if (PTEX_FOUND)
       add_subdirectory(dxPtexViewer)
   endif()

endif()


if (MAYA_FOUND AND (NOT NO_MAYA))
    add_subdirectory(mayaPolySmooth)
endif()