COMP: Support VTK_RENDERING_BACKEND set to None

CMakeLists.txt

@@ -35,6 +35,14 @@ set(_target_freetypeopengl)
 if(TARGET vtkRenderingFreeType${VTK_RENDERING_BACKEND})
   set(_target_freetypeopengl vtkRenderingFreeType${VTK_RENDERING_BACKEND})
 endif()
+set(_rendering_modules )
+if(NOT VTK_RENDERING_BACKEND STREQUAL "None")
+  set(_rendering_modules
+    vtkRendering${VTK_RENDERING_BACKEND}
+    vtkInteractionStyle
+    vtkInteractionWidgets
+    )
+endif()
 
 if (${VTK_VERSION} VERSION_LESS ${VERSION_MIN})
   message(ERROR " VtkGlue requires VTK version ${VERSION_MIN} or newer but the current version is ${VTK_VERSION}")
@@ -47,11 +55,9 @@ else()
     set(_wrap_module vtkWrappingPythonCore)
   endif()
   vtk_module_config(ITKVtkGlue_VTK
-    vtkRendering${VTK_RENDERING_BACKEND}
     vtkRenderingFreeType
     ${_target_freetypeopengl}
-    vtkInteractionStyle
-    vtkInteractionWidgets
+    ${_rendering_modules}
     vtkIOImage
     vtkIOLegacy
     vtkImagingSources
@@ -103,6 +109,13 @@ set(_target_freetypeopengl)
 if(TARGET vtkRenderingFreeType${VTK_RENDERING_BACKEND})
   set(_target_freetypeopengl vtkRenderingFreeType${VTK_RENDERING_BACKEND})
 endif()
+if(NOT VTK_RENDERING_BACKEND STREQUAL \"None\")
+  set(_rendering_modules
+    vtkRendering${VTK_RENDERING_BACKEND}
+    vtkInteractionStyle
+    vtkInteractionWidgets
+    )
+endif()
 
 if( ${VTK_VERSION} VERSION_LESS 6.0.0 )
   set(ITKVtkGlue_VTK_INCLUDE_DIRS ${VTK_INCLUDE_DIRS})
@@ -113,11 +126,9 @@ else()
     set(_wrap_module vtkWrappingPythonCore)
   endif()
   vtk_module_config(ITKVtkGlue_VTK
-    vtkRendering${VTK_RENDERING_BACKEND}
     vtkRenderingFreeType
     ${_target_freetypeopengl}
-    vtkInteractionStyle
-    vtkInteractionWidgets
+    ${_rendering_modules}
     vtkIOImage
     vtkIOLegacy
     vtkImagingSources
@@ -146,6 +157,13 @@ if(NOT ITK_BINARY_DIR)
   if(TARGET vtkRenderingFreeType${VTK_RENDERING_BACKEND})
     set(_target_freetypeopengl vtkRenderingFreeType${VTK_RENDERING_BACKEND})
   endif()
+  if(NOT VTK_RENDERING_BACKEND STREQUAL \"None\")
+    set(_rendering_modules
+      vtkRendering${VTK_RENDERING_BACKEND}
+      vtkInteractionStyle
+      vtkInteractionWidgets
+      )
+  endif()
 
   if( ${VTK_VERSION} VERSION_LESS 6.0.0 )
     set(ITKVtkGlue_VTK_INCLUDE_DIRS ${VTK_INCLUDE_DIRS})
@@ -156,11 +174,9 @@ if(NOT ITK_BINARY_DIR)
       set(_wrap_module vtkWrappingPythonCore)
     endif()
     vtk_module_config(ITKVtkGlue_VTK
-      vtkRendering${VTK_RENDERING_BACKEND}
       vtkRenderingFreeType
       ${_target_freetypeopengl}
-      vtkInteractionStyle
-      vtkInteractionWidgets
+      ${_rendering_modules}
       vtkIOImage
       vtkIOLegacy
       vtkImagingSources

src/CMakeLists.txt

@@ -1,7 +1,10 @@
 set(ITKVtkGlue_SRCS
   itkVTKImageExportBase.cxx
-  QuickView.cxx
   )
+if(NOT VTK_RENDERING_BACKEND STREQUAL "None")
+  list(APPEND ITKVtkGlue_SRCS QuickView.cxx)
+endif()
+
 
 itk_module_add_library(ITKVtkGlue ${ITKVtkGlue_SRCS})
 target_link_libraries_with_dynamic_lookup(ITKVtkGlue ${ITKVtkGlue_VTK_LIBRARIES})

test/CMakeLists.txt

@@ -1,30 +1,28 @@
 itk_module_test()
 
 set(ITKVtkGlueTests
-  itkVtkConnectedComponentImageFilterTest
-  itkVtkMedianFilterTest.cxx
   itkImageToVTKImageFilterTest.cxx
   itkImageToVTKImageFilterRGBTest.cxx
   itkVTKImageToImageFilterTest.cxx
   itkMeshToVTKUnstructuredGridFilterTest.cxx
-  QuickViewTest.cxx
+  )
+if(NOT VTK_RENDERING_BACKEND STREQUAL "None")
   # ### runViewImage ###
   # No test generated. Use it for view images (2D or 3D) with:
   # ITKVtkGlueTestDriver runViewImage image_file
   # or with a string to change title window, and change size of window
   # ITKVtkGlueTestDriver runViewImage image_file "MyImage"
-  runViewImage.cxx
-  )
+  list(APPEND ITKVtkGlueTests
+    runViewImage.cxx
+    QuickViewTest.cxx
+    itkVtkConnectedComponentImageFilterTest.cxx
+    itkVtkMedianFilterTest.cxx
+    )
+endif()
 
 CreateTestDriver(ITKVtkGlue "${ITKVtkGlue-Test_LIBRARIES}" "${ITKVtkGlueTests}")
 target_link_libraries_with_dynamic_lookup(ITKVtkGlueTestDriver ${ITKVtkGlue_VTK_LIBRARIES})
 
-itk_add_test(NAME itkVtkMedianImageFilterTest
-  COMMAND ITKVtkGlueTestDriver
-    itkVtkMedianFilterTest DATA{Input/cthead1.png} 2
-  )
-set_property(TEST itkVtkMedianImageFilterTest APPEND PROPERTY LABELS REQUIRES_DISPLAY)
-
 itk_add_test(NAME itkImageToVTKImageFilterTest
   COMMAND ITKVtkGlueTestDriver
     itkImageToVTKImageFilterTest
@@ -40,22 +38,30 @@ itk_add_test(NAME itkVTKImageToImageFilterTest
     itkVTKImageToImageFilterTest
   )
 
-itk_add_test(NAME QuickViewTest
-  COMMAND ITKVtkGlueTestDriver
-           --compare DATA{Baseline/QuickViewTest.png,:}
-                     ${ITK_TEST_OUTPUT_DIR}/QuickViewTest0.png
-           --compareNumberOfPixelsTolerance 1500
-    QuickViewTest DATA{Input/peppers.png} ${ITK_TEST_OUTPUT_DIR}
-  )
-set_property(TEST QuickViewTest APPEND PROPERTY LABELS REQUIRES_DISPLAY)
-
-itk_add_test(NAME itkVtkConnectedComponentImageFilterTest
-  COMMAND ITKVtkGlueTestDriver
-    itkVtkConnectedComponentImageFilterTest DATA{Input/cthead1.png}
-  )
-set_property(TEST itkVtkConnectedComponentImageFilterTest APPEND PROPERTY LABELS REQUIRES_DISPLAY)
-
 itk_add_test(NAME itkMeshToVTKUnstructuredGridFilterTest
   COMMAND ITKVtkGlueTestDriver
   itkMeshToVTKUnstructuredGridFilterTest DATA{Input/cow.vtk} ${ITK_TEST_OUTPUT_DIR}/cow_converted.vtk DATA{Input/cow.vtk}
   )
+
+if(NOT VTK_RENDERING_BACKEND STREQUAL "None")
+  itk_add_test(NAME itkVtkMedianImageFilterTest
+    COMMAND ITKVtkGlueTestDriver
+      itkVtkMedianFilterTest DATA{Input/cthead1.png} 2
+    )
+  set_property(TEST itkVtkMedianImageFilterTest APPEND PROPERTY LABELS REQUIRES_DISPLAY)
+
+  itk_add_test(NAME QuickViewTest
+    COMMAND ITKVtkGlueTestDriver
+             --compare DATA{Baseline/QuickViewTest.png,:}
+                       ${ITK_TEST_OUTPUT_DIR}/QuickViewTest0.png
+             --compareNumberOfPixelsTolerance 1500
+      QuickViewTest DATA{Input/peppers.png} ${ITK_TEST_OUTPUT_DIR}
+    )
+  set_property(TEST QuickViewTest APPEND PROPERTY LABELS REQUIRES_DISPLAY)
+
+  itk_add_test(NAME itkVtkConnectedComponentImageFilterTest
+    COMMAND ITKVtkGlueTestDriver
+      itkVtkConnectedComponentImageFilterTest DATA{Input/cthead1.png}
+    )
+  set_property(TEST itkVtkConnectedComponentImageFilterTest APPEND PROPERTY LABELS REQUIRES_DISPLAY)
+endif()