Ensure bed shape is in correct orientation (#9350)

Fix #9345

This also fixes deltamaker's plate logo rendering:
![image](https://github.com/user-attachments/assets/517c9b3c-8eee-4081-a2bc-5913fe35328b)

And fix bed rendering issue for custom shaped bed without model:
![image](https://github.com/user-attachments/assets/9643413e-9b1c-4e74-afe8-edf2306e7021)


Also fix rendering of exclusion area that are defined in clockwise:
![image](https://github.com/user-attachments/assets/0949c1c3-6304-4ece-85c7-f3162249bf90)

src/libslic3r/BuildVolume.cpp

@@ -14,6 +14,7 @@ BuildVolume::BuildVolume(const std::vector<Vec2d> &printable_area, const double
     assert(printable_height >= 0);
 
     m_polygon     = Polygon::new_scale(printable_area);
+    assert(m_polygon.is_counter_clockwise());
 
     // Calcuate various metrics of the input polygon.
     m_convex_hull = Geometry::convex_hull(m_polygon.points);

src/libslic3r/ClipperUtils.cpp

@@ -1410,4 +1410,14 @@ ExPolygons variable_offset_inner_ex(const ExPolygon &expoly, const std::vector<s
 	return output;
 }
 
+Pointfs make_counter_clockwise(const Pointfs& pointfs)
+{
+    Pointfs ps = pointfs;
+    if (Polygon::new_scale(pointfs).is_clockwise()) {
+        std::reverse(ps.begin(), ps.end());
+    }
+
+    return ps;
+}
+
 }

src/libslic3r/ClipperUtils.hpp

@@ -661,6 +661,8 @@ Polygons  variable_offset_outer(const ExPolygon &expoly, const std::vector<std::
 ExPolygons variable_offset_outer_ex(const ExPolygon &expoly, const std::vector<std::vector<float>> &deltas, double miter_limit = 2.);
 ExPolygons variable_offset_inner_ex(const ExPolygon &expoly, const std::vector<std::vector<float>> &deltas, double miter_limit = 2.);
 
+Pointfs make_counter_clockwise(const Pointfs& pointfs);
+
 } // namespace Slic3r
 
 #endif // slic3r_ClipperUtils_hpp_

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -831,7 +831,7 @@ void GCodeProcessor::apply_config(const DynamicPrintConfig& config)
 
     const ConfigOptionPoints* printable_area = config.option<ConfigOptionPoints>("printable_area");
     if (printable_area != nullptr)
-        m_result.printable_area = printable_area->values;
+        m_result.printable_area = make_counter_clockwise(printable_area->values);
 
     //BBS: add bed_exclude_area
     const ConfigOptionPoints* bed_exclude_area = config.option<ConfigOptionPoints>("bed_exclude_area");

src/libslic3r/PrintConfig.cpp

@@ -8117,15 +8117,15 @@ Points get_bed_shape(const DynamicPrintConfig &config)
         return {};
     }
 
-    return to_points(bed_shape_opt->values);
+    return to_points(make_counter_clockwise(bed_shape_opt->values));
 }
 
 Points get_bed_shape(const PrintConfig &cfg)
 {
-    return to_points(cfg.printable_area.values);
+    return to_points(make_counter_clockwise(cfg.printable_area.values));
 }
 
-Points get_bed_shape(const SLAPrinterConfig &cfg) { return to_points(cfg.printable_area.values); }
+Points get_bed_shape(const SLAPrinterConfig &cfg) { return to_points(make_counter_clockwise(cfg.printable_area.values)); }
 
 Polygon get_bed_shape_with_excluded_area(const PrintConfig& cfg)
 {