First try to convert a user printer profiles to the physical printers

src/libslic3r/Preset.cpp

@@ -1481,7 +1481,7 @@ PhysicalPrinterCollection::PhysicalPrinterCollection( const std::vector<std::str
 {
 }
 
-// Load all presets found in dir_path.
+// Load all printers found in dir_path.
 // Throws an exception on error.
 void PhysicalPrinterCollection::load_printers(const std::string& dir_path, const std::string& subdir)
 {
@@ -1498,7 +1498,7 @@ void PhysicalPrinterCollection::load_printers(const std::string& dir_path, const
             if (this->find_printer(name, false)) {
                 // This happens when there's is a preset (most likely legacy one) with the same name as a system preset
                 // that's already been loaded from a bundle.
-                BOOST_LOG_TRIVIAL(warning) << "Preset already present, not loading: " << name;
+                BOOST_LOG_TRIVIAL(warning) << "Printer already present, not loading: " << name;
                 continue;
             }
             try {
@@ -1530,6 +1530,35 @@ void PhysicalPrinterCollection::load_printers(const std::string& dir_path, const
         throw std::runtime_error(errors_cummulative);
 }
 
+// if there is saved user presets, contains information about "Print Host upload",
+// Create default printers with this presets
+// Throws an exception on error.
+void PhysicalPrinterCollection::load_printers(const PrinterPresetCollection& printer_presets, std::string def_printer_name/* = ""*/)
+{
+    if (def_printer_name.empty()) 
+        def_printer_name = "Printer";
+
+    int cnt=0;
+    std::string errors_cummulative;
+    // Store the loaded printers into a new vector
+    std::deque<PhysicalPrinter> printers_loaded;
+    for (const Preset& preset: printer_presets) {
+        const DynamicPrintConfig& config = preset.config;
+        if (!config.opt_string("print_host").empty()        ||
+            !config.opt_string("printhost_apikey").empty()  ||
+            !config.opt_string("printhost_cafile").empty()  ) {
+            PhysicalPrinter printer((boost::format("%1% %2%") % def_printer_name % ++cnt ).str(), preset);
+            printer.loaded = true;
+            printers_loaded.emplace_back(printer);
+
+            save_printer(printer);
+        }
+    }
+
+    if (!errors_cummulative.empty())
+        throw std::runtime_error(errors_cummulative);
+}
+
 PhysicalPrinter* PhysicalPrinterCollection::find_printer( const std::string& name, bool first_visible_if_not_found)
 {
     PhysicalPrinter key(name);

src/libslic3r/Preset.hpp

@@ -626,6 +626,7 @@ public:
 
     // Load ini files of the particular type from the provided directory path.
     void            load_printers(const std::string& dir_path, const std::string& subdir);
+    void            load_printers(const PrinterPresetCollection &printer_presets, std::string def_printer_name = "");
 
     // Save the printer under a new name. If the name is different from the old one,
     // a new printer is stored into the list of printers.

src/libslic3r/PresetBundle.cpp

@@ -201,6 +201,7 @@ void PresetBundle::load_presets(AppConfig &config, const std::string &preferred_
     }
     try {
         this->physical_printers.load_printers(dir_user_presets, "physical_printer");
+        this->physical_printers.load_printers(this->printers);
     } catch (const std::runtime_error &err) {
         errors_cummulative += err.what();
     }

src/slic3r/GUI/PresetComboBoxes.cpp

@@ -131,6 +131,12 @@ PresetComboBox::~PresetComboBox()
 {
 }
 
+BitmapCache& PresetComboBox::bitmap_cache()
+{
+    static BitmapCache bmps;
+    return bmps;
+}
+
 void PresetComboBox::set_label_marker(int item, LabelItemType label_item_type)
 {
     this->SetClientData(item, (void*)label_item_type);

src/slic3r/GUI/PresetComboBoxes.hpp

@@ -10,7 +10,7 @@
 #include "libslic3r/Preset.hpp"
 #include "wxExtensions.hpp"
 #include "GUI_Utils.hpp"
-#include "BitmapCache.hpp"
+//#include "BitmapCache.hpp"
 
 class wxString;
 class wxTextCtrl;
@@ -22,7 +22,7 @@ namespace Slic3r {
 
 namespace GUI {
 
-
+class BitmapCache;
 // ---------------------------------
 // ***  PresetComboBox  ***
 // ---------------------------------
@@ -72,10 +72,7 @@ protected:
     PresetCollection*   m_collection {nullptr};
 
     // Caching bitmaps for the all bitmaps, used in preset comboboxes
-    static BitmapCache& bitmap_cache() {
-        static BitmapCache bmps;
-        return bmps;
-    }
+    static BitmapCache& bitmap_cache();
 
     // Indicator, that the preset is compatible with the selected printer.
     ScalableBitmap      m_bitmapCompatible;