From d27c7edab5596ad83d7e43f4411b87eee7d4b5c4 Mon Sep 17 00:00:00 2001
From: Rafael Palomar <rafael.palomar@ous-research.no>
Date: Mon, 8 Dec 2025 12:51:20 +0100
Subject: [PATCH] ENH: Enable AutoInit for LayerDM

This commit provides the project with a specific
`vtkSlicerLayerDMModuleMRMLDisplayableManagerExport.h` file, which
replaces the generic one created by the build process; this file
explicitly performs vtk module autoinit, thus removing the need for
explicit code to do this when
`vtkSlicerLayerDMModuleMRMLDisplayableManager` is used . In addition,
this commit removes the no longer needed autoinit code for
`qSlicerLayerDMModule.cxx`, which exemplifies the point.
---
 LayerDM/MRMLDM/CMakeLists.txt                 |  8 +++++++
 ...ayerDMModuleMRMLDisplayableManagerExport.h | 24 +++++++++++++++++++
 LayerDM/qSlicerLayerDMModule.cxx              |  4 ----
 3 files changed, 32 insertions(+), 4 deletions(-)
 create mode 100644 LayerDM/MRMLDM/vtkSlicerLayerDMModuleMRMLDisplayableManagerExport.h

diff --git a/LayerDM/MRMLDM/CMakeLists.txt b/LayerDM/MRMLDM/CMakeLists.txt
index a22135d..09a2509 100644
--- a/LayerDM/MRMLDM/CMakeLists.txt
+++ b/LayerDM/MRMLDM/CMakeLists.txt
@@ -64,6 +64,7 @@ set(${KIT}_TARGET_LIBRARIES
 )
 
 #-----------------------------------------------------------------------------
+
 SlicerMacroBuildModuleLogic(
   NAME ${KIT}
   EXPORT_DIRECTIVE ${${KIT}_EXPORT_DIRECTIVE}
@@ -79,4 +80,11 @@ target_include_directories(
   ${${KIT}_BINARY_DIR}
 )
 
+if(${KIT}_AUTOINIT)
+  set_property(TARGET ${KIT}
+    APPEND PROPERTY COMPILE_DEFINITIONS
+    "${KIT}_AUTOINIT=1(${KIT})"
+    )
+endif()
+
 target_compile_features(${KIT} PUBLIC cxx_std_17)
diff --git a/LayerDM/MRMLDM/vtkSlicerLayerDMModuleMRMLDisplayableManagerExport.h b/LayerDM/MRMLDM/vtkSlicerLayerDMModuleMRMLDisplayableManagerExport.h
new file mode 100644
index 0000000..b5bfa44
--- /dev/null
+++ b/LayerDM/MRMLDM/vtkSlicerLayerDMModuleMRMLDisplayableManagerExport.h
@@ -0,0 +1,24 @@
+///  vtkSlicerLayerDMModuleMRMLDisplayableManagerExport
+///
+/// The vtkSlicerLayerDMModuleMRMLDisplayableManagerExport captures some system differences between Unix
+/// and Windows operating systems, and enables auto init for the VTK module.
+
+#ifndef __vtkSlicerLayerDMModuleMRMLDisplayableManagerExport_h
+#define __vtkSlicerLayerDMModuleMRMLDisplayableManagerExport_h
+
+#if defined(_WIN32) && !defined(MRMLLayerDM_STATIC)
+# if defined(vtkSlicerLayerDMModuleMRMLDisplayableManager_EXPORTS)
+#  define VTK_SLICER_LAYERDM_MODULE_MRMLDISPLAYABLEMANAGER_EXPORT __declspec(dllexport)
+# else
+#  define VTK_SLICER_LAYERDM_MODULE_MRMLDISPLAYABLEMANAGER_EXPORT __declspec(dllimport)
+# endif
+#else
+# define VTK_SLICER_LAYERDM_MODULE_MRMLDISPLAYABLEMANAGER_EXPORT
+#endif
+
+#if defined(vtkSlicerLayerDMModuleMRMLDisplayableManager_AUTOINIT)
+# include <vtkAutoInit.h>
+VTK_AUTOINIT(vtkSlicerLayerDMModuleMRMLDisplayableManager)
+#endif
+
+#endif
diff --git a/LayerDM/qSlicerLayerDMModule.cxx b/LayerDM/qSlicerLayerDMModule.cxx
index af651d9..1aaf5f8 100644
--- a/LayerDM/qSlicerLayerDMModule.cxx
+++ b/LayerDM/qSlicerLayerDMModule.cxx
@@ -19,10 +19,6 @@
 
 #include "vtkMRMLLayerDisplayableManager.h"
 
-#include <vtkAutoInit.h>
-
-VTK_MODULE_INIT(vtkSlicerLayerDMModuleMRMLDisplayableManager);
-
 //-----------------------------------------------------------------------------
 qSlicerLayerDMModule::qSlicerLayerDMModule(QObject* _parent)
   : Superclass(_parent)