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#
# Find the packages required by this module
#
# Needed VTK version
set(VERSION_MIN "8.1.0")
# Look for VTK
find_package(VTK NO_MODULE REQUIRED)
if(NOT COMMAND vtk_module_config)
macro(vtk_module_config ns)
foreach(arg ${ARGN})
if(${arg} MATCHES "^[Vv][Tt][Kk]")
string(
REGEX
REPLACE "^[Vv][Tt][Kk]"
""
_arg
${arg})
else()
set(_arg ${arg})
endif()
set(${ns}_LIBRARIES ${${ns}_LIBRARIES} VTK::${_arg})
endforeach()
endmacro()
if(NOT VTK_RENDERING_BACKEND)
set(VTK_RENDERING_BACKEND OpenGL2)
endif()
endif()
# Older versions of VTK (VTK 5.5 for example) do not have VTK_VERSION, in this
# case it needs to be defined manually
if(NOT VTK_VERSION)
set(VTK_VERSION "${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}.${VTK_BUILD_VERSION}")
endif()
if(NOT VTK_RENDERING_BACKEND)
if(NOT COMMAND vtk_module_config)
set(VTK_RENDERING_BACKEND OpenGL2)
else()
set(VTK_RENDERING_BACKEND OpenGL)
endif()
endif()
set(_target_prefix "vtk")
if(VTK_VERSION VERSION_GREATER_EQUAL 8.90.0)
set(_target_prefix "VTK::")
endif()
set(_target_freetypeopengl)
if(TARGET ${_target_prefix}RenderingFreeType${VTK_RENDERING_BACKEND})
set(_target_freetypeopengl ${_target_prefix}RenderingFreeType${VTK_RENDERING_BACKEND})
endif()
set(_required_vtk_libraries ${_target_prefix}IOImage ${_target_prefix}ImagingSources)
if(ITK_WRAP_PYTHON)
list(
APPEND
_required_vtk_libraries
${_target_prefix}WrappingPythonCore
${_target_prefix}CommonCore
${_target_prefix}CommonDataModel
${_target_prefix}CommonExecutionModel)
endif()
if(NOT
VTK_RENDERING_BACKEND
STREQUAL
"None")
list(
APPEND
_required_vtk_libraries
${_target_prefix}Rendering${VTK_RENDERING_BACKEND}
${_target_prefix}RenderingFreeType
${_target_freetypeopengl}
${_target_prefix}InteractionStyle
${_target_prefix}InteractionWidgets)
endif()
if(${VTK_VERSION} VERSION_LESS ${VERSION_MIN})
message(ERROR " VtkGlue requires VTK version ${VERSION_MIN} or newer but the current version is ${VTK_VERSION}")
else()
vtk_module_config(ITKVtkGlue_VTK ${_required_vtk_libraries})
set(ITKVtkGlue_VTK_LIBRARIES ${_required_vtk_libraries})
endif()
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