update

xs/xsp/Flow.xsp

@@ -0,0 +1,60 @@
+%module{Slic3r::XS};
+
+%{
+#include <xsinit.h>
+#include "libslic3r/Flow.hpp"
+%}
+
+%name{Slic3r::Flow} class Flow {
+    ~Flow();
+    %name{_new} Flow(float width, float height, float nozzle_diameter);
+    Clone<Flow> clone()
+        %code{% RETVAL = THIS; %};
+    
+    float width();
+    float height();
+    float nozzle_diameter();
+    bool bridge();
+    float spacing();
+    int   scaled_width();
+    int   scaled_spacing();
+    double mm3_per_mm();
+%{
+
+Flow*
+_new_from_width(CLASS, role, width, nozzle_diameter, height)
+    char*           CLASS;
+    FlowRole        role;
+    std::string     width;
+    float           nozzle_diameter;
+    float           height;
+    CODE:
+        ConfigOptionFloatOrPercent optwidth;
+        optwidth.deserialize(width, ForwardCompatibilitySubstitutionRule::Disable);
+        RETVAL = new Flow(Flow::new_from_config_width(role, optwidth, nozzle_diameter, height));
+    OUTPUT:
+        RETVAL
+
+%}
+};
+
+%package{Slic3r::Flow};
+%{
+
+IV
+_constant()
+  ALIAS:
+    FLOW_ROLE_EXTERNAL_PERIMETER            = frExternalPerimeter
+    FLOW_ROLE_PERIMETER                     = frPerimeter
+    FLOW_ROLE_INFILL                        = frInfill
+    FLOW_ROLE_SOLID_INFILL                  = frSolidInfill
+    FLOW_ROLE_TOP_SOLID_INFILL              = frTopSolidInfill
+    FLOW_ROLE_SUPPORT_MATERIAL              = frSupportMaterial
+    FLOW_ROLE_SUPPORT_MATERIAL_INTERFACE    = frSupportMaterialInterface
+  PROTOTYPE:
+  CODE:
+    RETVAL = ix;
+  OUTPUT: RETVAL
+
+%}
+