1 files changed, 21 insertions, 1 deletions
diff --git a/source/blender/nodes/composite/nodes/node_composite_id_mask.cc b/source/blender/nodes/composite/nodes/node_composite_id_mask.cc
index 25ab9aa63fc..a71b3f132c0 100644
--- a/source/blender/nodes/composite/nodes/node_composite_id_mask.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_id_mask.cc
@@ -8,6 +8,8 @@
 #include "UI_interface.h"
 #include "UI_resources.h"
 
+#include "COM_node_operation.hh"
+
 #include "node_composite_util.hh"
 
 /* **************** ID Mask  ******************** */
@@ -20,12 +22,29 @@ static void cmp_node_idmask_declare(NodeDeclarationBuilder &b)
   b.add_output<decl::Float>(N_("Alpha"));
 }
 
-static void node_composit_buts_id_mask(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
+static void node_composit_buts_id_mask(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
 {
   uiItemR(layout, ptr, "index", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
   uiItemR(layout, ptr, "use_antialiasing", UI_ITEM_R_SPLIT_EMPTY_NAME, nullptr, ICON_NONE);
 }
 
+using namespace blender::realtime_compositor;
+
+class IDMaskOperation : public NodeOperation {
+ public:
+  using NodeOperation::NodeOperation;
+
+  void execute() override
+  {
+    get_input("ID value").pass_through(get_result("Alpha"));
+  }
+};
+
+static NodeOperation *get_compositor_operation(Context &context, DNode node)
+{
+  return new IDMaskOperation(context, node);
+}
+
 }  // namespace blender::nodes::node_composite_id_mask_cc
 
 void register_node_type_cmp_idmask()
@@ -37,6 +56,7 @@ void register_node_type_cmp_idmask()
   cmp_node_type_base(&ntype, CMP_NODE_ID_MASK, "ID Mask", NODE_CLASS_CONVERTER);
   ntype.declare = file_ns::cmp_node_idmask_declare;
   ntype.draw_buttons = file_ns::node_composit_buts_id_mask;
+  ntype.get_compositor_operation = file_ns::get_compositor_operation;
 
   nodeRegisterType(&ntype);
 }