Brim: optionally generate brim from Elephant Foot Compensation outline (#11760)

* Brim can follow EFC outline

* Optimization

* Update Spanish EFC brim description

Adopt reviewer-proposed wording from RF47.

Co-authored-by: RF47 <RF47@users.noreply.github.com>

* Tag Orca specific changes

Tag Orca specific changes vs. Bambu using the comment //ORCA: . This helps when reviewing merge commits from upstream Bambu so we don't end up causing regressions when pulling in commits from upstream

* Tooltip update

---------

Co-authored-by: RF47 <RF47@users.noreply.github.com>
Co-authored-by: Ioannis Giannakas <59056762+igiannakas@users.noreply.github.com>

src/libslic3r/Preset.cpp

@@ -904,7 +904,7 @@ static std::vector<std::string> s_Preset_print_options {
     "top_surface_speed", "support_speed", "support_object_xy_distance", "support_object_first_layer_gap", "support_interface_speed",
     "bridge_speed", "internal_bridge_speed", "gap_infill_speed", "travel_speed", "travel_speed_z", "initial_layer_speed",
     "outer_wall_acceleration", "initial_layer_acceleration", "top_surface_acceleration", "default_acceleration", "skirt_type", "skirt_loops", "skirt_speed","min_skirt_length", "skirt_distance", "skirt_start_angle", "skirt_height","single_loop_draft_shield", "draft_shield",
-    "brim_width", "brim_object_gap", "brim_type", "brim_ears_max_angle", "brim_ears_detection_length", "enable_support", "support_type", "support_threshold_angle", "support_threshold_overlap","enforce_support_layers",
+    "brim_width", "brim_object_gap", "brim_use_efc_outline", "brim_type", "brim_ears_max_angle", "brim_ears_detection_length", "enable_support", "support_type", "support_threshold_angle", "support_threshold_overlap","enforce_support_layers",
     "raft_layers", "raft_first_layer_density", "raft_first_layer_expansion", "raft_contact_distance", "raft_expansion",
     "support_base_pattern", "support_base_pattern_spacing", "support_expansion", "support_style",
     // BBS

src/libslic3r/PrintConfig.cpp

@@ -1562,6 +1562,16 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloat(0.));
 
+    def = this->add("brim_use_efc_outline", coBool);
+    def->label = L("Brim follows compensated outline");
+    def->category = L("Support");
+    def->tooltip = L("When enabled, the brim is aligned with the first-layer perimeter geometry after Elephant Foot Compensation is applied.\n"
+                    "This option is intended for cases where Elephant Foot Compensation significantly alters the first-layer footprint.\n"
+                    "\n"
+                    "If your current setup already works well, enabling it may be unnecessary and can cause the brim to fuse with upper layers." );
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionBool(false));
+
     def = this->add("brim_ears", coBool);
     def->label = L("Brim ears");
     def->category = L("Support");

src/libslic3r/PrintConfig.hpp

@@ -874,6 +874,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     PrintObjectConfig,
 
     ((ConfigOptionFloat,               brim_object_gap))
+    ((ConfigOptionBool,                brim_use_efc_outline))
     ((ConfigOptionEnum<BrimType>,      brim_type))
     ((ConfigOptionFloat,               brim_width))
     ((ConfigOptionFloat,               brim_ears_detection_length))

src/libslic3r/PrintObject.cpp

@@ -1006,6 +1006,7 @@ bool PrintObject::invalidate_state_by_config_options(
     for (const t_config_option_key &opt_key : opt_keys) {
         if (   opt_key == "brim_width"
             || opt_key == "brim_object_gap"
+            || opt_key == "brim_use_efc_outline"
             || opt_key == "brim_type"
             || opt_key == "brim_ears_max_angle"
             || opt_key == "brim_ears_detection_length"