feat(web): wire Blender camera focus object

blender-5.2.0/source/blender/web_engine/web_engine_main_state.cpp

@@ -5689,6 +5689,33 @@ bool web_engine_blend_main_set_world_environment_strength(WebBlendMainState *sta
   return true;
 }
 
+bool web_engine_blend_main_set_camera_focus_object(WebBlendMainState *state,
+                                                    const char *target_id,
+                                                    const char *focus_object_id,
+                                                    std::string &error)
+{
+  if (state == nullptr || state->main == nullptr || target_id == nullptr || focus_object_id == nullptr) {
+    error = "RENDER_PROPERTY_INVALID: camera focus target is missing";
+    return false;
+  }
+  Camera *camera = find_camera(state->main, target_id);
+  if (camera == nullptr || !ensure_single_user_data(state->main, &camera->id, error)) {
+    if (error.empty()) error = "RENDER_PROPERTY_INVALID: camera was not found";
+    return false;
+  }
+  Object *focus_object = nullptr;
+  if (focus_object_id[0] != '\0') {
+    focus_object = find_object(state->main, focus_object_id);
+    if (focus_object == nullptr) {
+      error = "RENDER_PROPERTY_INVALID: camera focus object was not found";
+      return false;
+    }
+  }
+  camera->dof.focus_object = focus_object;
+  camera->id.recalc |= ID_RECALC_PARAMETERS;
+  return true;
+}
+
 bool web_engine_blend_main_set_render_properties(WebBlendMainState *state,
                                                   const char *target_id,
                                                   const char *properties_json,
@@ -5849,6 +5876,14 @@ bool web_engine_blend_main_set_render_properties(WebBlendMainState *state,
         if (dof["enabled"].get<bool>()) camera->dof.flag |= CAM_DOF_ENABLED;
         else camera->dof.flag &= ~CAM_DOF_ENABLED;
       }
+      if (dof.contains("focusObjectId")) {
+        if (!dof["focusObjectId"].is_null() && !dof["focusObjectId"].is_string()) {
+          error = "RENDER_PROPERTY_INVALID: depthOfField.focusObjectId must be a string or null";
+          return false;
+        }
+        const std::string focus_id = dof["focusObjectId"].is_null() ? std::string() : dof["focusObjectId"].get<std::string>();
+        if (!web_engine_blend_main_set_camera_focus_object(state, target_id, focus_id.c_str(), error)) return false;
+      }
       const auto dof_float = [&](const char *key, float minimum, float maximum, float &target) {
         if (!dof.contains(key)) return true;
         if (!dof[key].is_number()) return false;

blender-5.2.0/source/blender/web_engine/web_engine_main_state.h

@@ -573,6 +573,10 @@ bool web_engine_blend_main_set_world_environment_strength(WebBlendMainState *sta
                                                            const char *target_id,
                                                            float strength,
                                                            std::string &error);
+bool web_engine_blend_main_set_camera_focus_object(WebBlendMainState *state,
+                                                    const char *target_id,
+                                                    const char *focus_object_id,
+                                                    std::string &error);
 bool web_engine_blend_main_set_scene_properties(WebBlendMainState *state,
                                                  const char *target_id,
                                                  const char *properties_json,