Merge branch 'blender-v5.0-release'

source/blender/modifiers/CMakeLists.txt

@@ -143,6 +143,7 @@ set(LIB
   PRIVATE bf::geometry
   PRIVATE bf::intern::guardedalloc
   PRIVATE bf::extern::fmtlib
+  PRIVATE bf::extern::xxhash
   PRIVATE bf::nodes
   PRIVATE bf::render
   PRIVATE bf::windowmanager

source/blender/modifiers/MOD_nodes.hh

@@ -6,6 +6,9 @@
 
 #include <memory>
 
+#include "BLI_array.hh"
+#include "NOD_socket_usage_inference_fwd.hh"
+
 struct NodesModifierData;
 struct NodesModifierDataBlock;
 struct Object;
@@ -28,6 +31,18 @@ void MOD_nodes_update_interface(Object *object, NodesModifierData *nmd);
 
 namespace blender {
 
+class NodesModifierUsageInferenceCache {
+ private:
+  uint64_t input_values_hash_ = 0;
+
+ public:
+  Array<nodes::socket_usage_inference::SocketUsage> inputs;
+  Array<nodes::socket_usage_inference::SocketUsage> outputs;
+
+  void ensure(const NodesModifierData &nmd);
+  void reset();
+};
+
 struct NodesModifierRuntime {
   /**
    * Contains logged information from the last evaluation.
@@ -42,6 +57,11 @@ struct NodesModifierRuntime {
    * used by the evaluated modifier.
    */
   std::shared_ptr<bke::bake::ModifierCache> cache;
+  /**
+   * Cache the usage of the node group inputs and outputs to accelerate drawing the UI when no
+   * properties change.
+   */
+  NodesModifierUsageInferenceCache usage_cache;
 };
 
 void nodes_modifier_data_block_destruct(NodesModifierDataBlock *data_block, bool do_id_user);

source/blender/modifiers/intern/MOD_nodes.cc

@@ -10,6 +10,7 @@
 #include <fmt/format.h>
 #include <sstream>
 #include <string>
+#include <xxhash.h>
 
 #include "MEM_guardedalloc.h"
 
@@ -451,6 +452,7 @@ void MOD_nodes_update_interface(Object *object, NodesModifierData *nmd)
   update_id_properties_from_node_group(nmd);
   update_bakes_from_node_group(*nmd);
   update_panels_from_node_group(*nmd);
+  nmd->runtime->usage_cache.reset();
 
   DEG_id_tag_update(&object->id, ID_RECALC_GEOMETRY);
 }
@@ -1952,6 +1954,63 @@ static void modify_geometry_set(ModifierData *md,
   modifyGeometry(md, ctx, *geometry_set);
 }
 
+void NodesModifierUsageInferenceCache::ensure(const NodesModifierData &nmd)
+{
+  if (!nmd.node_group) {
+    this->reset();
+    return;
+  }
+  if (ID_MISSING(&nmd.node_group->id)) {
+    this->reset();
+    return;
+  }
+  const bNodeTree &tree = *nmd.node_group;
+  tree.ensure_interface_cache();
+  tree.ensure_topology_cache();
+  ResourceScope scope;
+  const Vector<nodes::InferenceValue> group_input_values =
+      nodes::get_geometry_nodes_input_inference_values(tree, nmd.settings.properties, scope);
+
+  /* Compute the hash of the input values. This has to be done everytime currently, because there
+   * is no reliable callback yet that is called any of the modifier properties changes. */
+  XXH3_state_t *state = XXH3_createState();
+  XXH3_64bits_reset(state);
+  BLI_SCOPED_DEFER([&]() { XXH3_freeState(state); });
+  for (const int input_i : IndexRange(nmd.node_group->interface_inputs().size())) {
+    const nodes::InferenceValue &value = group_input_values[input_i];
+    XXH3_64bits_update(state, &input_i, sizeof(input_i));
+    if (value.is_primitive_value()) {
+      const void *value_ptr = value.get_primitive_ptr();
+      const bNodeTreeInterfaceSocket &io_socket = *nmd.node_group->interface_inputs()[input_i];
+      const CPPType &base_type = *io_socket.socket_typeinfo()->base_cpp_type;
+      uint64_t value_hash = base_type.hash_or_fallback(value_ptr, 0);
+      XXH3_64bits_update(state, &value_hash, sizeof(value_hash));
+    }
+  }
+  const uint64_t new_input_values_hash = XXH3_64bits_digest(state);
+  if (new_input_values_hash == input_values_hash_) {
+    if (this->inputs.size() == tree.interface_inputs().size() &&
+        this->outputs.size() == tree.interface_outputs().size())
+    {
+      /* The cache is up to date, so return early. */
+      return;
+    }
+  }
+  /* Compute the new usage inference result. */
+  this->inputs.reinitialize(tree.interface_inputs().size());
+  this->outputs.reinitialize(tree.interface_outputs().size());
+  nodes::socket_usage_inference::infer_group_interface_usage(
+      tree, group_input_values, inputs, outputs);
+  input_values_hash_ = new_input_values_hash;
+}
+
+void NodesModifierUsageInferenceCache::reset()
+{
+  input_values_hash_ = 0;
+  this->inputs = {};
+  this->outputs = {};
+}
+
 static void panel_draw(const bContext *C, Panel *panel)
 {
   uiLayout *layout = panel->layout;