Moved C++ code into new libslic3r directory

xs/src/libslic3r/PrintRegion.cpp

@@ -0,0 +1,70 @@
+#include "Print.hpp"
+
+namespace Slic3r {
+
+PrintRegion::PrintRegion(Print* print)
+    : _print(print)
+{
+}
+
+PrintRegion::~PrintRegion()
+{
+}
+
+Print*
+PrintRegion::print()
+{
+    return this->_print;
+}
+
+Flow
+PrintRegion::flow(FlowRole role, double layer_height, bool bridge, bool first_layer, double width, const PrintObject &object) const
+{
+    ConfigOptionFloatOrPercent config_width;
+    if (width != -1) {
+        // use the supplied custom width, if any
+        config_width.value = width;
+        config_width.percent = false;
+    } else {
+        // otherwise, get extrusion width from configuration
+        // (might be an absolute value, or a percent value, or zero for auto)
+        if (first_layer && this->_print->config.first_layer_extrusion_width.value > 0) {
+            config_width = this->_print->config.first_layer_extrusion_width;
+        } else if (role == frExternalPerimeter) {
+            config_width = this->config.external_perimeter_extrusion_width;
+        } else if (role == frPerimeter) {
+            config_width = this->config.perimeter_extrusion_width;
+        } else if (role == frInfill) {
+            config_width = this->config.infill_extrusion_width;
+        } else if (role == frSolidInfill) {
+            config_width = this->config.solid_infill_extrusion_width;
+        } else if (role == frTopSolidInfill) {
+            config_width = this->config.top_infill_extrusion_width;
+        } else {
+            CONFESS("Unknown role");
+        }
+    }
+    if (config_width.value == 0) {
+        config_width = object.config.extrusion_width;
+    }
+    
+    // get the configured nozzle_diameter for the extruder associated
+    // to the flow role requested
+    size_t extruder;  // 1-based
+    if (role == frPerimeter || role == frExternalPerimeter) {
+        extruder = this->config.perimeter_extruder;
+    } else if (role == frInfill || role == frSolidInfill || role == frTopSolidInfill) {
+        extruder = this->config.infill_extruder;
+    } else {
+        CONFESS("Unknown role $role");
+    }
+    double nozzle_diameter = this->_print->config.nozzle_diameter.get_at(extruder-1);
+    
+    return Flow::new_from_config_width(role, config_width, nozzle_diameter, layer_height, bridge ? this->config.bridge_flow_ratio : 0);
+}
+
+#ifdef SLIC3RXS
+REGISTER_CLASS(PrintRegion, "Print::Region");
+#endif
+
+}