Compositor: Support Warning node

This patch adds support for the Warning node in the compositor, which
already exist in Geometry Nodes.

Partially resolves #144443.

Pull Request: https://projects.blender.org/blender/blender/pulls/158632

scripts/startup/bl_ui/node_add_menu_compositor.py

@@ -81,6 +81,7 @@ class NODE_MT_compositor_node_output_base(node_add_menu.NodeMenu):
         self.node_operator(layout, "NodeEnableOutput")
         self.node_operator(layout, "NodeGroupOutput")
         self.node_operator(layout, "CompositorNodeViewer")
+        self.node_operator_with_searchable_enum(context, layout, "GeometryNodeWarning", "warning_type")
         if context.space_data.node_tree_sub_type == 'SCENE':
             layout.separator()
             self.node_operator(layout, "CompositorNodeOutputFile")

scripts/startup/bl_ui/space_node.py

@@ -837,7 +837,7 @@ class NODE_PT_active_node_generic(Panel):
         col.prop(node, "show_options")
         col.prop(node, "mute")
 
-        if tree.type == 'GEOMETRY':
+        if tree.type in ('GEOMETRY', 'COMPOSITING'):
             layout.prop(node, "warning_propagation", text="Propagate")
 
 

source/blender/compositor/intern/scheduler.cc

@@ -121,6 +121,13 @@ static void add_output_nodes(const Context &context,
     }
   }
 
+  /* Add Warning nodes. */
+  for (const bNode *node : node_group.nodes_by_type("GeometryNodeWarning"_ustr)) {
+    if (!node->is_muted()) {
+      node_stack.push(node);
+    }
+  }
+
   /* Add File Output nodes. */
   if (flag_is_set(needed_outputs_types, NodeGroupOutputTypes::FileOutputNode)) {
     for (const bNode *node : node_group.nodes_by_type("CompositorNodeOutputFile"_ustr)) {

source/blender/editors/space_node/node_draw.cc

@@ -2168,7 +2168,7 @@ static void node_add_error_message_button(const TreeDrawContext &tree_draw_ctx,
                                           const rctf &rect,
                                           float &icon_offset)
 {
-  if (ntree.type == NTREE_GEOMETRY) {
+  if (ELEM(ntree.type, NTREE_GEOMETRY, NTREE_COMPOSIT)) {
     nodes::eval_log::NodeTreeLog *geo_tree_log = [&]() -> nodes::eval_log::NodeTreeLog * {
       const bNodeTreeZones *zones = node.owner_tree().zones();
       if (!zones) {

source/blender/nodes/geometry/nodes/node_geo_warning.cc

@@ -13,6 +13,8 @@
 #include "RNA_access.hh"
 #include "RNA_enum_types.hh"
 
+#include "COM_node_operation.hh"
+
 namespace blender {
 
 namespace nodes::node_geo_warning_cc {
@@ -70,6 +72,40 @@ class LazyFunctionForWarningNode : public LazyFunction {
   }
 };
 
+using namespace blender::compositor;
+
+class WarningOperation : public NodeOperation {
+ public:
+  using NodeOperation::NodeOperation;
+
+  void execute() override
+  {
+    const Result &input_show = this->get_input("Show");
+    Result &output_show = this->get_result("Show");
+    output_show.share_data(input_show);
+    if (!input_show.get_single_value_default<bool>()) {
+      return;
+    }
+
+    nodes::eval_log::NodesEvalLog *log = this->context().nodes_evaluation_log();
+    if (!log) {
+      return;
+    }
+    nodes::eval_log::NodeTreeLogger &tree_logger = log->get_local_tree_logger(
+        this->get_compute_context());
+
+    const std::string message = this->get_input("Message").get_single_value_default<std::string>();
+    tree_logger.node_warnings.append(
+        *tree_logger.allocator,
+        {this->node().identifier, {NodeWarningType(this->node().custom1), std::move(message)}});
+  }
+};
+
+static NodeOperation *get_compositor_operation(Context &context, const bNode &node)
+{
+  return new WarningOperation(context, node);
+}
+
 static void node_layout(ui::Layout &layout, bContext * /*C*/, PointerRNA *ptr)
 {
   layout.use_property_split_set(true);
@@ -104,7 +140,7 @@ static void node_register()
 {
   static bke::bNodeType ntype;
 
-  geo_node_type_base(&ntype, "GeometryNodeWarning"_ustr, GEO_NODE_WARNING);
+  geo_cmp_node_type_base(&ntype, "GeometryNodeWarning"_ustr, GEO_NODE_WARNING);
   ntype.ui_name = "Warning";
   ntype.ui_description = "Create custom warnings in node groups";
   ntype.enum_name_legacy = "WARNING";
@@ -112,6 +148,7 @@ static void node_register()
   ntype.declare = node_declare;
   ntype.labelfunc = node_label;
   ntype.draw_buttons = node_layout;
+  ntype.get_compositor_operation = get_compositor_operation;
   bke::node_register_type(ntype);
 
   node_rna(ntype.rna_ext.srna);