Removed code transferred to GPURigidRegistrationLib and fetch the code from GitHub instead

IbisPlugins/GPU_RigidRegistration/CMakeLists.txt

@@ -2,13 +2,11 @@
 set( PluginSrc
         gpu_rigidregistrationplugininterface.cpp
         gpu_rigidregistrationwidget.cpp
-        gpu_rigidregistration.cpp
         qdebugstream.h
     )
 set( PluginHdrMoc 
         gpu_rigidregistrationwidget.h
         gpu_rigidregistrationplugininterface.h
-        gpu_rigidregistration.h
     )
 set( PluginUi gpu_rigidregistrationwidget.ui )
 
@@ -24,10 +22,35 @@ IF( NOT IBIS_USE_ELASTIX )
   message( SEND_ERROR "GPU_RigidRegistration plugin require Elastix library. Please enable IBIS_USE_ELASTIX.\n" )
 ENDIF()
 
-add_subdirectory( itkRegistrationOpenCL )
+#--------------------------------------------------
+# Fetch and setup build for GPURigidRegistration lib
+#--------------------------------------------------
+include(FetchContent)
+#FetchContent_Declare(
+#  GPURigidRegistrationLib
+#  GIT_REPOSITORY https://github.com/drouin-simon/GPURigidRegistrationLib.git
+#  GIT_TAG fix-build-mac-remove-vtk-mni-from-lib )
+
+set(FETCHCONTENT_BASE_DIR ${IBIS_EXTERNAL_DEPENDENCIES_DIR}/GR CACHE PATH "Directory under which to collect all populated content" FORCE)
+
+FetchContent_Declare(
+  GPURigidRegistrationLib
+  GIT_REPOSITORY https://github.com/IbisNeuronav/GPURigidRegistrationLib.git
+  GIT_TAG main 
+  SOURCE_DIR ${FETCHCONTENT_BASE_DIR}/src
+  BINARY_DIR ${FETCHCONTENT_BASE_DIR}/build
+  SUBBUILD_DIR ${FETCHCONTENT_BASE_DIR}/subbuild
+  )
+
+# Don't build library's tests
+set( GPURR_BUILD_TEST OFF CACHE BOOL "" FORCE)
+set( GPURR_BUILD_EXECUTABLE OFF CACHE BOOL "" FORCE)
+
+FetchContent_MakeAvailable(GPURigidRegistrationLib)
+#--------------------------------------------------
 
 # Create plugin
 DefinePlugin( "${PluginSrc}" "${PluginHdr}" "${PluginHdrMoc}" "${PluginUi}" )
 
 #add library specific to this plugin
-target_link_libraries( ${PluginName} itkRegistrationOpenCL )
+target_link_libraries( ${PluginName} GPURigidRegistrationLib )