fixes: typos, gcode viewer offset, no-seam layers.

resources/ui_layout/default/filament.ui

@@ -43,7 +43,7 @@ group:Fan speed - default
 		setting:id$0:label_width$12:label$Interface:support_material_interface_fan_speed
 	line:Bridges fan speed
 		setting:id$0:label_width$12:label$Bridges:bridge_fan_speed
-		setting:id$0:label_width$12:label$Internal bridges:bridge_internal_fan_speed
+		setting:id$0:label_width$12:label$Internal bridges:internal_bridge_fan_speed
 	line:Overhangs Perimeter fan speed
 		setting:id$0:label_width$12:label$Overhangs:overhangs_fan_speed
 	line:Gap fill fan speed

resources/ui_layout/default/print.ui

@@ -401,7 +401,7 @@ group:label_width$9:sidetext_width$8:Acceleration control (advanced)
 		setting:width$4:brim_acceleration
 	line:Bridge acceleration
 		setting:width$4:bridge_acceleration
-		setting:width$4:bridge_internal_acceleration
+		setting:width$4:internal_bridge_acceleration
 		setting:width$4:overhangs_acceleration
 	line:Other extrusions acceleration
 		setting:width$4:gap_fill_acceleration

resources/ui_layout/example/filament.ui

@@ -48,7 +48,7 @@ group:Fan speed - default
 		setting:id$0:label_width$12:label$Interface:support_material_interface_fan_speed
 	line:Bridges fan speed
 		setting:id$0:label_width$12:label$Bridges:bridge_fan_speed
-		setting:id$0:label_width$12:label$Internal bridges:bridge_internal_fan_speed
+		setting:id$0:label_width$12:label$Internal bridges:internal_bridge_fan_speed
 	line:Overhangs Perimeter fan speed
 		setting:id$0:label_width$12:label$Overhangs:overhangs_fan_speed
 	line:Gap fill fan speed

resources/ui_layout/example/print.ui

@@ -370,7 +370,7 @@ group:label_width$9:sidetext_width$8:Acceleration control (advanced)
 		setting:width$4:brim_acceleration
 	line:Bridge acceleration
 		setting:width$4:bridge_acceleration
-		setting:width$4:bridge_internal_acceleration
+		setting:width$4:internal_bridge_acceleration
 		setting:width$4:overhangs_acceleration
 	line:Other extrusions acceleration
 		setting:width$4:gap_fill_acceleration

src/libslic3r/GCode.cpp

@@ -1427,8 +1427,8 @@ void GCode::_do_export(Print& print_mod, GCodeOutputStream &file, ThumbnailsGene
 
     //klipper can hide gcode into a macro, so add guessed init gcode to the processor.
     if (this->config().start_gcode_manual) {
-        std::string gcode = m_writer.preamble();
-        m_processor.process_string(gcode,  this->m_throw_if_canceled);
+        // from m_writer.preamble();
+        m_processor.process_preamble(true/*unit_mm*/, true/*absolute_coords*/, m_writer.config.use_relative_e_distances.value, 0/*G92*/);
     }
 
     if (! print.config().gcode_substitutions.empty()) {

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -1373,6 +1373,31 @@ void GCodeProcessor::process_string(const std::string& gcode, std::function<void
         });
 }
 
+void GCodeProcessor::process_preamble(bool unit_mm, bool absolute_coords, bool absolute_extrusion, float set_G92_value)
+{
+    if (unit_mm) {
+        m_units = EUnits::Millimeters;
+    } else {
+        m_units = EUnits::Inches;
+    }
+
+    if (absolute_coords) {
+        m_global_positioning_type = EPositioningType::Absolute;
+    } else {
+        m_global_positioning_type = EPositioningType::Relative;
+    }
+
+    if (absolute_extrusion) {
+        m_e_local_positioning_type = EPositioningType::Absolute;
+    } else {
+        m_e_local_positioning_type = EPositioningType::Relative;
+    }
+
+    {
+        m_origin[E] = m_end_position[E] = set_G92_value * (m_units == EUnits::Inches) ? INCHES_TO_MM : 1.0f;
+    }
+}
+
 static inline const char* skip_whitespaces(const char *begin, const char *end) {
     for (; begin != end && (*begin == ' ' || *begin == '\t'); ++ begin);
     return begin;

src/libslic3r/GCode/GCodeProcessor.hpp

@@ -631,6 +631,7 @@ namespace Slic3r {
         // throws CanceledException through print->throw_if_canceled() (sent by the caller as callback).
         void process_file(const std::string& filename, std::function<void()> cancel_callback = nullptr);
         void process_string(const std::string& gcode, std::function<void()> cancel_callback = nullptr);
+        void process_preamble(bool unit_mm, bool absolute_coords, bool absolute_extrusion, float set_G92_value);
 
         // Streaming interface, for processing G-codes just generated by PrusaSlicer in a pipelined fashion.
         void initialize(const std::string& filename);

src/libslic3r/GCode/SeamPlacer.cpp

@@ -477,6 +477,8 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
                 //path.polygons_covered_by_width(*polygons, SCALED_EPSILON);
                 assert(corresponding_regions_out->size() == polylines->size());
                 polylines->emplace_back(path.polyline.get_points(), true, true, PolylineWithEnd::PolyDir::BOTH); // TODO: more point for arcs
+                assert(path.polyline.front() != path.polyline.back());
+                assert(path.polyline.size() > 1);
                 //while (corresponding_regions_out->size() < polylines->size()) {
                     corresponding_regions_out->push_back(current_layer_region);
                 //}
@@ -490,6 +492,7 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
                 loop.collect_points(pts);
                 pts.push_back(pts.front()); //polygon
                 assert(corresponding_regions_out->size() == polylines->size());
+                assert(pts.size() > 1);
                 polylines->emplace_back(std::move(pts), true, false, is_ccw ? PolylineWithEnd::PolyDir::CCW : PolylineWithEnd::PolyDir::CW);
                 corresponding_regions_out->push_back(current_layer_region);
                 return;
@@ -504,6 +507,7 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
                         if(!previous_collected)
                             polys.emplace_back(false, false, is_ccw ? PolylineWithEnd::PolyDir::CCW : PolylineWithEnd::PolyDir::CW);
                         path.collect_points(polys.back().points);
+                        assert(polys.back().size() > 1);
                         count_paths_collected++;
                         current_collected = true;
                     }
@@ -512,6 +516,7 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
                         if(!previous_collected)
                             polys.emplace_back(false, false, is_ccw ? PolylineWithEnd::PolyDir::CCW : PolylineWithEnd::PolyDir::CW);
                         path.collect_points(polys.back().points);
+                        assert(polys.back().size() > 1);
                         count_paths_collected++;
                         current_collected = true;
                     }
@@ -545,6 +550,8 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
                                             idx == 0 ? true : false,
                                             idx + 1 < collection.size() ? false : true,
                                             PolylineWithEnd::PolyDir::BOTH); // TODO: more points for arcs
+                    assert(path.polyline.front() != path.polyline.back());
+                    assert(path.polyline.size() > 1);
                     corresponding_regions_out->push_back(current_layer_region);
                 }
             }
@@ -576,6 +583,7 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
                         // what to do in this case?
                         Points pts;
                         ex_entity->collect_points(pts);
+                        assert(pts.front() != pts.back());
                         polylines.emplace_back(std::move(pts), true, pts.front() != pts.back(), PolylineWithEnd::PolyDir::BOTH);
                         corresponding_regions_out.push_back(layer_region);
                     }
@@ -586,7 +594,7 @@ PolylineWithEnds extract_perimeter_polylines(const Layer *layer, const SeamPosit
     }
     if (polylines.empty()) { // If there are no perimeter polylines/polygons for whatever reason (disabled perimeters .. ) insert dummy point
         // it is easier than checking everywhere if the layer is not emtpy, no seam will be placed to this layer anyway
-        polylines.emplace_back(std::vector{ Point { 0, 0 } }, true, true, PolylineWithEnd::PolyDir::BOTH);
+        polylines.emplace_back(std::vector<Point>{ /*Point { 0, 0 }*/ }, true, true, PolylineWithEnd::PolyDir::BOTH);
         corresponding_regions_out.push_back(nullptr);
     }
     assert(corresponding_regions_out.size() == polylines.size());

src/libslic3r/PrintConfig.cpp

@@ -5920,7 +5920,7 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionInt(0));
 
     def = this->add("print_first_layer_temperature", coInt);
-    def->label = L("Temperature");
+    def->label = L("First Layer Temperature");
     def->category = OptionCategory::filament;
     def->tooltip = L("Override the temperature of the extruder (for the first layer). Avoid making too many changes, it won't stop for cooling/heating. 0 to disable (using print_temperature if defined). May only work on Height range modifiers.");
     def->mode = comExpert | comSuSi;

src/slic3r/GUI/CalibrationPressureAdvDialog.cpp

@@ -248,7 +248,7 @@ void CalibrationPressureAdvDialog::create_geometry(wxCommandEvent& event_args) {
     {"BridgeInfill", "bridge_acceleration"},
     {"ExternalPerimeter", "external_perimeter_acceleration"},
     {"GapFill", "gap_fill_acceleration"},
-    {"InternalBridgeInfill", "bridge_internal_acceleration"},
+    {"InternalBridgeInfill", "internal_bridge_acceleration"},
     {"Ironing", "ironing_acceleration"},
     {"OverhangPerimeter", "overhangs_acceleration"},
     {"Perimeter", "perimeter_acceleration"},
@@ -307,7 +307,7 @@ struct ExtrusionSettings {// think a struct is better instead of all the maps ?
         //{"BridgeInfill", {"placeholder", "bridge_acceleration", "placeholder"}},//special calc required
         {"ExternalPerimeter", {"external_perimeter_extrusion_width", "external_perimeter_acceleration"}},
         //{"GapFill", {"placeholder", "gap_fill_acceleration"}},//special calc required
-        //{"InternalBridgeInfill", {"placeholder", "bridge_internal_acceleration"}},//special calc required
+        //{"InternalBridgeInfill", {"placeholder", "internal_bridge_acceleration"}},//special calc required
         {"Ironing", {"top_infill_extrusion_width", "ironing_acceleration"}},
         {"OverhangPerimeter", {"overhangs_width", "overhangs_acceleration"}},
         {"Perimeter", {"perimeter_extrusion_width", "perimeter_acceleration"}},