Feature: Small perimeters speed for supports (#13459)

src/libslic3r/PrintConfig.cpp

@@ -2191,6 +2191,28 @@ void PrintConfigDef::init_fff_params()
     def->nullable = true;
     def->set_default_value(new ConfigOptionFloatsNullable{0});
 
+    def = this->add("small_support_perimeter_speed", coFloatsOrPercents);
+    def->label = L("Small support perimeters");
+    def->category = L("Speed");
+    def->tooltip = L("Same as \"Small perimeters\", but for supports. "
+                    "This separate setting will affect the speed of support for areas <= `small_support_perimeter_threshold`. "
+                    "If expressed as a percentage (for example: 80%), it will be calculated on the support or support interface speed setting above. "
+                    "Set to zero for auto.");
+    def->sidetext = L("mm/s or %");
+    def->ratio_over = "outer_wall_speed";
+    def->min = 1;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloatsOrPercentsNullable{FloatOrPercent(50, true)});
+
+    def = this->add("small_support_perimeter_threshold", coFloats);
+    def->label = L("Small support perimeters threshold");
+    def->category = L("Speed");
+    def->tooltip = L("This sets the threshold for small support perimeter length. The default threshold is 0mm.");
+    def->sidetext = L("mm");	// millimeters, CIS languages need translation
+    def->min = 0;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionFloatsNullable{0});
+
     def = this->add("wall_sequence", coEnum);
     def->label = L("Walls printing order");
     def->category = L("Quality");