Add Post-processing (#159)

It is now possible to call external  post-process scripts

src/libslic3r/Preset.cpp

@@ -749,7 +749,7 @@ static std::vector<std::string> s_Preset_print_options {
      "wall_generator", "wall_transition_length", "wall_transition_filter_deviation", "wall_transition_angle",
      "wall_distribution_count", "min_feature_size", "min_bead_width",
      // SoftFever
-     "small_perimeter_speed", "small_perimeter_threshold","bridge_angle", "filter_out_gap_fill", "travel_acceleration","inner_wall_acceleration",
+     "small_perimeter_speed", "small_perimeter_threshold","bridge_angle", "filter_out_gap_fill", "post_process", "travel_acceleration","inner_wall_acceleration",
      "default_jerk", "outer_wall_jerk", "inner_wall_jerk", "top_surface_jerk", "initial_layer_jerk","travel_jerk",
      "top_solid_infill_flow_ratio","bottom_solid_infill_flow_ratio","only_one_wall_first_layer",
      "print_flow_ratio"

src/libslic3r/Print.cpp

@@ -84,6 +84,7 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "close_fan_the_first_x_layers",
         "machine_end_gcode",
         "filament_end_gcode",
+        "post_process",
         "extruder_clearance_height_to_rod",
         "extruder_clearance_height_to_lid",
         "extruder_clearance_radius",

src/libslic3r/PrintConfig.cpp

@@ -2168,7 +2168,20 @@ void PrintConfigDef::init_fff_params()
     def->min = 0;
     def->max = 1000;
     def->set_default_value(new ConfigOptionInt(2));
-
+    
+    def = this->add("post_process", coStrings);
+    def->label = L("Post-processing Scripts");
+    def->tooltip = L("If you want to process the output G-code through custom scripts, "
+                   "just list their absolute paths here. Separate multiple scripts with a semicolon. "
+                   "Scripts will be passed the absolute path to the G-code file as the first argument, "
+                   "and they can access the Slic3r config settings by reading environment variables.");
+    def->gui_flags = "serialized";
+    def->multiline = true;
+    def->full_width = true;
+    def->height = 6;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionStrings());
+    
     def = this->add("printer_model", coString);
     //def->label = L("Printer type");
     //def->tooltip = L("Type of the printer");

src/libslic3r/PrintConfig.hpp

@@ -921,6 +921,7 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionBool,               reduce_infill_retraction))
     ((ConfigOptionBool,               ooze_prevention))
     ((ConfigOptionString,             filename_format))
+    ((ConfigOptionStrings,            post_process))
     ((ConfigOptionString,             printer_model))
     ((ConfigOptionFloat,              resolution))
     ((ConfigOptionFloats,             retraction_minimum_travel))