ENH: get start_gcode filament

Change-Id: Ia511f758d5c59ddc38c79f251e8c95511de4a235

src/libslic3r/GCode.cpp

@@ -1744,6 +1744,7 @@ void GCode::_do_export(Print& print, GCodeOutputStream &file, ThumbnailsGenerato
     file.writeln(machine_start_gcode);
     //BBS: gcode writer doesn't know where the real position of extruder is after inserting custom gcode
     m_writer.set_current_position_clear(false);
+    m_start_gcode_filament = GCodeProcessor::get_gcode_last_filament(machine_start_gcode);
 
     // Process filament-specific gcode.
    /* if (has_wipe_tower) {
@@ -4152,13 +4153,17 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
     int old_filament_temp, old_filament_e_feedrate;
 
     float filament_area = float((M_PI / 4.f) * pow(m_config.filament_diameter.get_at(extruder_id), 2));
-
-    if (m_writer.extruder() != nullptr) {
+    //BBS: add handling for filament change in start gcode
+    int previous_extruder_id = -1;
+    if (m_writer.extruder() != nullptr || m_start_gcode_filament != -1) {
         std::vector<float> flush_matrix(cast<float>(m_config.flush_volumes_matrix.values));
         const unsigned int number_of_extruders = (unsigned int)(sqrt(flush_matrix.size()) + EPSILON);
-        assert(m_writer.extruder()->id() < number_of_extruders);
+        if (m_writer.extruder() != nullptr)
+            assert(m_writer.extruder()->id() < number_of_extruders);
+        else
+            assert(m_start_gcode_filament < number_of_extruders);
 
-        int previous_extruder_id = m_writer.extruder()->id();
+        previous_extruder_id = m_writer.extruder() != nullptr ? m_writer.extruder()->id() : m_start_gcode_filament;
         old_retract_length = m_config.retraction_length.get_at(previous_extruder_id);
         old_retract_length_toolchange = m_config.retract_length_toolchange.get_at(previous_extruder_id);
         old_filament_temp = this->on_first_layer()? m_config.nozzle_temperature_initial_layer.get_at(previous_extruder_id) : m_config.nozzle_temperature.get_at(previous_extruder_id);
@@ -4166,8 +4171,9 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
         wipe_volume *= m_config.flush_multiplier;
         old_filament_e_feedrate = (int)(60.0 * m_config.filament_max_volumetric_speed.get_at(previous_extruder_id) / filament_area);
         old_filament_e_feedrate = old_filament_e_feedrate == 0 ? 100 : old_filament_e_feedrate;
-    }
-    else {
+        //BBS: must clean m_start_gcode_filament
+        m_start_gcode_filament = -1;
+    } else {
         old_retract_length = 0.f;
         old_retract_length_toolchange = 0.f;
         old_filament_temp = 0;
@@ -4179,7 +4185,7 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z)
     new_filament_e_feedrate = new_filament_e_feedrate == 0 ? 100 : new_filament_e_feedrate;
 
     DynamicConfig dyn_config;
-    dyn_config.set_key_value("previous_extruder", new ConfigOptionInt((int)(m_writer.extruder() != nullptr ? m_writer.extruder()->id() : -1)));
+    dyn_config.set_key_value("previous_extruder", new ConfigOptionInt(previous_extruder_id));
     dyn_config.set_key_value("next_extruder", new ConfigOptionInt((int)extruder_id));
     dyn_config.set_key_value("layer_num", new ConfigOptionInt(m_layer_index));
     dyn_config.set_key_value("layer_z", new ConfigOptionFloat(print_z));

src/libslic3r/GCode.hpp

@@ -486,6 +486,7 @@ private:
     unsigned int m_toolchange_count;
     coordf_t m_nominal_z;
     bool m_need_change_layer_lift_z = false;
+    int m_start_gcode_filament = -1;
 
     static bool gcode_label_objects;
 

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -1887,6 +1887,40 @@ template<typename T>
     }
 }
 
+int GCodeProcessor::get_gcode_last_filament(const std::string& gcode_str)
+{
+    int str_size = gcode_str.size();
+    int start_index = 0;
+    int end_index = 0;
+    int out_filament = -1;
+    while (end_index < str_size) {
+        if (gcode_str[end_index] != '\n') {
+            end_index++;
+            continue;
+        }
+
+        if (end_index > start_index) {
+            std::string line_str = gcode_str.substr(start_index, end_index - start_index);
+            line_str.erase(0, line_str.find_first_not_of(" "));
+            line_str.erase(line_str.find_last_not_of(" ") + 1);
+            if (line_str.empty() || line_str[0] != 'T') {
+                start_index = end_index + 1;
+                end_index = start_index;
+                continue;
+            }
+
+            int out = -1;
+            if (parse_number(line_str.substr(1), out) && out >= 0 && out < 255)
+                out_filament = out;
+        }
+
+        start_index = end_index + 1;
+        end_index = start_index;
+    }
+
+    return out_filament;
+}
+
 void GCodeProcessor::process_tags(const std::string_view comment, bool producers_enabled)
 {
     // producers tags

src/libslic3r/GCode/GCodeProcessor.hpp

@@ -237,6 +237,8 @@ namespace Slic3r {
         // (the first max_count found tags are returned into found_tag)
         static bool contains_reserved_tags(const std::string& gcode, unsigned int max_count, std::vector<std::string>& found_tag);
 
+        static int get_gcode_last_filament(const std::string &gcode_str);
+
         static const float Wipe_Width;
         static const float Wipe_Height;
 

src/libslic3r/PrintConfig.cpp

@@ -2509,7 +2509,7 @@ void PrintConfigDef::init_fff_params()
 
     def = this->add("support_filament", coInt);
     def->gui_type = ConfigOptionDef::GUIType::i_enum_open;
-    def->label    = L("Support base");
+    def->label    = L("Support/raft base");
     def->category = L("Support");
     def->tooltip = L("Filament to print support base and raft. \"Default\" means no specific filament for support and current filament is used");
     def->min = 0;
@@ -2534,7 +2534,7 @@ void PrintConfigDef::init_fff_params()
 
     def = this->add("support_interface_filament", coInt);
     def->gui_type = ConfigOptionDef::GUIType::i_enum_open;
-    def->label    = L("Support interface");
+    def->label    = L("Support/raft interface");
     def->category = L("Support");
     def->tooltip = L("Filament to print support interface. \"Default\" means no specific filament for support interface and current filament is used");
     def->min = 0;