OpenSubdiv: Add new OpenSubdiv related files

This includes C-API bindings in intern/opensubdiv and CMAke module
which finds the OpenSubdiv library. This filea are not in use so
far, making it a separate commit to make actual integration commit
more clear.

1 files changed, 111 insertions, 0 deletions

diff --git a/build_files/cmake/Modules/FindOpenSubdiv.cmake b/build_files/cmake/Modules/FindOpenSubdiv.cmake
new file mode 100644
index 00000000000..efbe8a967e1
--- /dev/null
+++ b/build_files/cmake/Modules/FindOpenSubdiv.cmake
@@ -0,0 +1,111 @@
+# - Find OpenSubdiv library
+# Find the native OpenSubdiv includes and library
+# This module defines
+#  OPENSUBDIV_INCLUDE_DIRS, where to find OpenSubdiv headers, Set when
+#                           OPENSUBDIV_INCLUDE_DIR is found.
+#  OPENSUBDIV_LIBRARIES, libraries to link against to use OpenSubdiv.
+#  OPENSUBDIV_ROOT_DIR, the base directory to search for OpenSubdiv.
+#                        This can also be an environment variable.
+#  OPENSUBDIV_FOUND, if false, do not try to use OpenSubdiv.
+#
+# also defined, but not for general use are
+#  OPENSUBDIV_LIBRARY, where to find the OpenSubdiv library.
+
+#=============================================================================
+# Copyright 2013 Blender Foundation.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+# If OPENSUBDIV_ROOT_DIR was defined in the environment, use it.
+IF(NOT OPENSUBDIV_ROOT_DIR AND NOT $ENV{OPENSUBDIV_ROOT_DIR} STREQUAL "")
+  SET(OPENSUBDIV_ROOT_DIR $ENV{OPENSUBDIV_ROOT_DIR})
+ENDIF()
+
+SET(_opensubdiv_FIND_COMPONENTS
+  osdGPU
+  osdCPU
+)
+
+SET(_opensubdiv_SEARCH_DIRS
+  ${OPENSUBDIV_ROOT_DIR}
+  /usr/local
+  /sw # Fink
+  /opt/local # DarwinPorts
+  /opt/csw # Blastwave
+  /opt/lib/opensubdiv
+)
+
+FIND_PATH(OPENSUBDIV_INCLUDE_DIR
+  NAMES
+    opensubdiv/osd/mesh.h
+  HINTS
+    ${_opensubdiv_SEARCH_DIRS}
+  PATH_SUFFIXES
+    include
+)
+
+SET(_opensubdiv_LIBRARIES)
+FOREACH(COMPONENT ${_opensubdiv_FIND_COMPONENTS})
+  STRING(TOUPPER ${COMPONENT} UPPERCOMPONENT)
+
+  FIND_LIBRARY(OPENSUBDIV_${UPPERCOMPONENT}_LIBRARY
+    NAMES
+      ${COMPONENT}
+    HINTS
+      ${_opensubdiv_SEARCH_DIRS}
+    PATH_SUFFIXES
+      lib64 lib
+    )
+  LIST(APPEND _opensubdiv_LIBRARIES "${OPENSUBDIV_${UPPERCOMPONENT}_LIBRARY}")
+ENDFOREACH()
+
+MACRO(OPENSUBDIV_CHECK_CONTROLLER
+      controller_include_file
+      variable_name)
+  IF(EXISTS "${OPENSUBDIV_INCLUDE_DIR}/opensubdiv/osd/${controller_include_file}")
+    SET(${variable_name} TRUE)
+  ELSE()
+    SET(${variable_name} FALSE)
+  ENDIF()
+ENDMACRO()
+
+
+# handle the QUIETLY and REQUIRED arguments and set OPENSUBDIV_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(OpenSubdiv DEFAULT_MSG
+    _opensubdiv_LIBRARIES OPENSUBDIV_INCLUDE_DIR)
+
+IF(OPENSUBDIV_FOUND)
+  SET(OPENSUBDIV_LIBRARIES ${_opensubdiv_LIBRARIES})
+  SET(OPENSUBDIV_INCLUDE_DIRS ${OPENSUBDIV_INCLUDE_DIR})
+
+  # Find available compute controllers.
+
+  FIND_PACKAGE(OpenMP)
+  IF(OPENMP_FOUND)
+    SET(OPENSUBDIV_HAS_OPENMP TRUE)
+  ELSE()
+    SET(OPENSUBDIV_HAS_OPENMP FALSE)
+  ENDIF()
+
+  OPENSUBDIV_CHECK_CONTROLLER("tbbEvaluator.h" OPENSUBDIV_HAS_TBB)
+  OPENSUBDIV_CHECK_CONTROLLER("clEvaluator.h" OPENSUBDIV_HAS_OPENCL)
+  OPENSUBDIV_CHECK_CONTROLLER("cudaEvaluator.h" OPENSUBDIV_HAS_CUDA)
+  OPENSUBDIV_CHECK_CONTROLLER("glXFBEvaluator.h" OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK)
+  OPENSUBDIV_CHECK_CONTROLLER("glComputeEvaluator.h" OPENSUBDIV_HAS_GLSL_COMPUTE)
+ENDIF(OPENSUBDIV_FOUND)
+
+MARK_AS_ADVANCED(
+  OPENSUBDIV_INCLUDE_DIR
+)
+FOREACH(COMPONENT ${_opensubdiv_FIND_COMPONENTS})
+  STRING(TOUPPER ${COMPONENT} UPPERCOMPONENT)
+  MARK_AS_ADVANCED(OPENSUBDIV_${UPPERCOMPONENT}_LIBRARY)
+ENDFOREACH()