Merge pull request #20384 from rogday:find_package_cache

cmake/OpenCVDetectVTK.cmake

@@ -1,5 +1,7 @@
-# VTK 9.0
 if(NOT VTK_FOUND)
+  find_package(VTK QUIET NAMES vtk VTK)
+  if(VTK_FOUND)
+    if(VTK_VERSION VERSION_EQUAL "9") # VTK 9.0
       find_package(VTK 9 QUIET NAMES vtk COMPONENTS
               FiltersExtraction
               FiltersSources
@@ -12,10 +14,7 @@ if(NOT VTK_FOUND)
               RenderingLOD
               RenderingOpenGL2
               NO_MODULE)
-endif()
+    elseif(VTK_VERSION VERSION_GREATER "5") # VTK 6.x components
-
-# VTK 6.x components
-if(NOT VTK_FOUND)
       find_package(VTK QUIET COMPONENTS vtkInteractionStyle vtkRenderingLOD vtkIOPLY vtkFiltersTexture vtkRenderingFreeType vtkIOExport NO_MODULE)
       IF(VTK_FOUND)
         IF(VTK_RENDERING_BACKEND) #in vtk 7, the rendering backend is exported as a var.
@@ -24,11 +23,12 @@ if(NOT VTK_FOUND)
           find_package(VTK QUIET COMPONENTS vtkRenderingOpenGL vtkInteractionStyle vtkRenderingLOD vtkIOPLY vtkFiltersTexture vtkRenderingFreeType vtkIOExport NO_MODULE)
         ENDIF(VTK_RENDERING_BACKEND)
       ENDIF(VTK_FOUND)
-endif()
+    elseif(VTK_VERSION VERSION_EQUAL "5") # VTK 5.x components
-
-# VTK 5.x components
-if(NOT VTK_FOUND)
       find_package(VTK QUIET COMPONENTS vtkCommon NO_MODULE)
+    else()
+      set(VTK_FOUND FALSE)
+    endif()
+  endif()
 endif()
 
 if(NOT VTK_FOUND)