Implement GetRegionCode and add the RegionCode to settings (#999)

This implement `GetRegionCode` accordingly to RE. I've added a setting in the GUI and a field in the Configuration file with a way to update the Configuration file if needed.

12 files changed, 156 insertions, 6 deletions

diff --git a/Ryujinx.Common/Configuration/ConfigurationFileFormat.cs b/Ryujinx.Common/Configuration/ConfigurationFileFormat.cs
index 1a9407cb..a18db16a 100644
--- a/Ryujinx.Common/Configuration/ConfigurationFileFormat.cs
+++ b/Ryujinx.Common/Configuration/ConfigurationFileFormat.cs
@@ -74,6 +74,11 @@ namespace Ryujinx.Configuration
         public Language SystemLanguage { get; set; }
 
         /// <summary>
+        /// Change System Region
+        /// </summary>
+        public Region SystemRegion { get; set; }
+
+        /// <summary>
         /// Enables or disables Docked Mode
         /// </summary>
         public bool DockedMode { get; set; }
diff --git a/Ryujinx.Common/Configuration/ConfigurationState.cs b/Ryujinx.Common/Configuration/ConfigurationState.cs
index 050b4973..0f7b4084 100644
--- a/Ryujinx.Common/Configuration/ConfigurationState.cs
+++ b/Ryujinx.Common/Configuration/ConfigurationState.cs
@@ -149,6 +149,11 @@ namespace Ryujinx.Configuration
             public ReactiveObject<Language> Language { get; private set; }
 
             /// <summary>
+            /// Change System Region
+            /// </summary>
+            public ReactiveObject<Region> Region { get; private set; }
+
+            /// <summary>
             /// Enables or disables Docked Mode
             /// </summary>
             public ReactiveObject<bool> EnableDockedMode { get; private set; }
@@ -176,6 +181,7 @@ namespace Ryujinx.Configuration
             public SystemSection()
             {
                 Language                  = new ReactiveObject<Language>();
+                Region                    = new ReactiveObject<Region>();
                 EnableDockedMode          = new ReactiveObject<bool>();
                 EnableMulticoreScheduling = new ReactiveObject<bool>();
                 EnableFsIntegrityChecks   = new ReactiveObject<bool>();
@@ -289,7 +295,7 @@ namespace Ryujinx.Configuration
         {
             ConfigurationFileFormat configurationFile = new ConfigurationFileFormat
             {
-                Version                   = 1,
+                Version                   = 2,
                 GraphicsShadersDumpPath   = Graphics.ShadersDumpPath,
                 LoggingEnableDebug        = Logger.EnableDebug,
                 LoggingEnableStub         = Logger.EnableStub,
@@ -301,6 +307,7 @@ namespace Ryujinx.Configuration
                 LoggingFilteredClasses    = Logger.FilteredClasses,
                 EnableFileLog             = Logger.EnableFileLog,
                 SystemLanguage            = System.Language,
+                SystemRegion              = System.Region,
                 DockedMode                = System.EnableDockedMode,
                 EnableDiscordIntegration  = EnableDiscordIntegration,
                 EnableVsync               = Graphics.EnableVsync,
@@ -346,6 +353,7 @@ namespace Ryujinx.Configuration
             Logger.FilteredClasses.Value           = new LogClass[] { };
             Logger.EnableFileLog.Value             = true;
             System.Language.Value                  = Language.AmericanEnglish;
+            System.Region.Value                    = Region.USA;
             System.EnableDockedMode.Value          = false;
             EnableDiscordIntegration.Value         = true;
             Graphics.EnableVsync.Value             = true;
@@ -440,9 +448,11 @@ namespace Ryujinx.Configuration
             };
         }
 
-        public void Load(ConfigurationFileFormat configurationFileFormat)
+        public void Load(ConfigurationFileFormat configurationFileFormat, string configurationFilePath)
         {
-            if (configurationFileFormat.Version != 1 && configurationFileFormat.Version != 0)
+            bool configurationFileUpdated = false;
+
+            if (configurationFileFormat.Version < 0 || configurationFileFormat.Version > 2)
             {
                 Common.Logging.Logger.PrintWarning(LogClass.Application, $"Unsupported configuration version {configurationFileFormat.Version}, loading default.");
 
@@ -451,6 +461,15 @@ namespace Ryujinx.Configuration
                 return;
             }
 
+            if (configurationFileFormat.Version < 2)
+            {
+                Common.Logging.Logger.PrintWarning(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, needs to be updated.");
+
+                configurationFileFormat.SystemRegion = Region.USA;
+
+                configurationFileUpdated = true;
+            }
+
             Graphics.ShadersDumpPath.Value         = configurationFileFormat.GraphicsShadersDumpPath;
             Logger.EnableDebug.Value               = configurationFileFormat.LoggingEnableDebug;
             Logger.EnableStub.Value                = configurationFileFormat.LoggingEnableStub;
@@ -462,6 +481,7 @@ namespace Ryujinx.Configuration
             Logger.FilteredClasses.Value           = configurationFileFormat.LoggingFilteredClasses;
             Logger.EnableFileLog.Value             = configurationFileFormat.EnableFileLog;
             System.Language.Value                  = configurationFileFormat.SystemLanguage;
+            System.Region.Value                    = configurationFileFormat.SystemRegion;
             System.EnableDockedMode.Value          = configurationFileFormat.DockedMode;
             System.EnableDockedMode.Value          = configurationFileFormat.DockedMode;
             EnableDiscordIntegration.Value         = configurationFileFormat.EnableDiscordIntegration;
@@ -487,6 +507,13 @@ namespace Ryujinx.Configuration
             Hid.EnableKeyboard.Value               = configurationFileFormat.EnableKeyboard;
             Hid.KeyboardControls.Value             = configurationFileFormat.KeyboardControls;
             Hid.JoystickControls.Value             = configurationFileFormat.JoystickControls;
+
+            if (configurationFileUpdated)
+            {
+                ToFileFormat().SaveConfig(configurationFilePath);
+
+                Common.Logging.Logger.PrintWarning(LogClass.Application, "Configuration file is updated!");
+            }
         }
 
         public static void Initialize()
diff --git a/Ryujinx.Common/Configuration/System/Region.cs b/Ryujinx.Common/Configuration/System/Region.cs
new file mode 100644
index 00000000..54b1c36f
--- /dev/null
+++ b/Ryujinx.Common/Configuration/System/Region.cs
@@ -0,0 +1,13 @@
+namespace Ryujinx.Configuration.System
+{
+    public enum Region
+    {
+        Japan,
+        USA,
+        Europe,
+        Australia,
+        China,
+        Korea,
+        Taiwan
+    }
+}
diff --git a/Ryujinx.HLE/HOS/Services/Settings/ISettingsServer.cs b/Ryujinx.HLE/HOS/Services/Settings/ISettingsServer.cs
index 2d2512df..a8b10297 100644
--- a/Ryujinx.HLE/HOS/Services/Settings/ISettingsServer.cs
+++ b/Ryujinx.HLE/HOS/Services/Settings/ISettingsServer.cs
@@ -54,6 +54,24 @@ namespace Ryujinx.HLE.HOS.Services.Settings
             return ResultCode.Success;
         }
 
+        [Command(4)]
+        // GetRegionCode() -> u32 nn::settings::RegionCode
+        public ResultCode GetRegionCode(ServiceCtx context)
+        {
+            // NOTE: Service mount 0x8000000000000050 savedata and read the region code here.
+
+            SystemRegion regionCode = (SystemRegion)context.Device.System.State.DesiredRegionCode;
+
+            if (regionCode < SystemRegion.Min || regionCode > SystemRegion.Max)
+            {
+                regionCode = SystemRegion.USA;
+            }
+
+            context.ResponseData.Write((uint)regionCode);
+
+            return ResultCode.Success;
+        }
+
         [Command(5)]
         // GetAvailableLanguageCodes2() -> (u32, buffer<nn::settings::LanguageCode, 6>)
         public ResultCode GetAvailableLanguageCodes2(ServiceCtx context)
diff --git a/Ryujinx.HLE/HOS/SystemState/SystemRegion.cs b/Ryujinx.HLE/HOS/SystemState/SystemRegion.cs
new file mode 100644
index 00000000..9a07a4a8
--- /dev/null
+++ b/Ryujinx.HLE/HOS/SystemState/SystemRegion.cs
@@ -0,0 +1,16 @@
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public enum SystemRegion
+    {
+        Japan,
+        USA,
+        Europe,
+        Australia,
+        China,
+        Korea,
+        Taiwan,
+
+        Min = Japan,
+        Max = Taiwan
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs b/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs
index c2e6680d..b65d1030 100644
--- a/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs
+++ b/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs
@@ -37,6 +37,8 @@ namespace Ryujinx.HLE.HOS.SystemState
 
         internal long DesiredLanguageCode { get; private set; }
 
+        internal uint DesiredRegionCode { get; private set; }
+
         public TitleLanguage DesiredTitleLanguage { get; private set; }
 
         internal string ActiveAudioOutput { get; private set; }
@@ -79,6 +81,11 @@ namespace Ryujinx.HLE.HOS.SystemState
             }
         }
 
+        public void SetRegion(SystemRegion region)
+        {
+            DesiredRegionCode = (uint)region;
+        }
+
         public void SetAudioOutputAsTv()
         {
             ActiveAudioOutput = AudioOutputs[0];
diff --git a/Ryujinx.HLE/Switch.cs b/Ryujinx.HLE/Switch.cs
index b7db5c62..3cd290bd 100644
--- a/Ryujinx.HLE/Switch.cs
+++ b/Ryujinx.HLE/Switch.cs
@@ -69,6 +69,8 @@ namespace Ryujinx.HLE
         {
             System.State.SetLanguage((SystemLanguage)ConfigurationState.Instance.System.Language.Value);
 
+            System.State.SetRegion((SystemRegion)ConfigurationState.Instance.System.Region.Value);
+
             EnableDeviceVsync = ConfigurationState.Instance.Graphics.EnableVsync;
 
             // TODO: Make this reloadable and implement Docking/Undocking logic.
diff --git a/Ryujinx/Config.json b/Ryujinx/Config.json
index e35a67ac..80430899 100644
--- a/Ryujinx/Config.json
+++ b/Ryujinx/Config.json
@@ -1,5 +1,5 @@
 {
-    "version": 1,
+    "version": 2,
     "graphics_shaders_dump_path": "",
     "logging_enable_debug": false,
     "logging_enable_stub": true,
@@ -11,6 +11,7 @@
     "logging_filtered_classes": [],
     "enable_file_log": true,
     "system_language": "AmericanEnglish",
+    "system_region": "USA",
     "docked_mode": false,
     "enable_discord_integration": true,
     "enable_vsync": true,
diff --git a/Ryujinx/Program.cs b/Ryujinx/Program.cs
index 7ff2b64f..2f02e003 100644
--- a/Ryujinx/Program.cs
+++ b/Ryujinx/Program.cs
@@ -53,7 +53,7 @@ namespace Ryujinx
 
                 ConfigurationFileFormat configurationFileFormat = ConfigurationFileFormat.Load(localConfigurationPath);
 
-                ConfigurationState.Instance.Load(configurationFileFormat);
+                ConfigurationState.Instance.Load(configurationFileFormat, ConfigurationPath);
             }
             else if (File.Exists(globalConfigurationPath))
             {
@@ -61,7 +61,7 @@ namespace Ryujinx
 
                 ConfigurationFileFormat configurationFileFormat = ConfigurationFileFormat.Load(globalConfigurationPath);
 
-                ConfigurationState.Instance.Load(configurationFileFormat);
+                ConfigurationState.Instance.Load(configurationFileFormat, ConfigurationPath);
             }
             else
             {
diff --git a/Ryujinx/Ui/SwitchSettings.cs b/Ryujinx/Ui/SwitchSettings.cs
index da2d4a74..6fe490c8 100644
--- a/Ryujinx/Ui/SwitchSettings.cs
+++ b/Ryujinx/Ui/SwitchSettings.cs
@@ -39,6 +39,7 @@ namespace Ryujinx.Ui
         [GUI] CheckButton  _ignoreToggle;
         [GUI] CheckButton  _directKeyboardAccess;
         [GUI] ComboBoxText _systemLanguageSelect;
+        [GUI] ComboBoxText _systemRegionSelect;
         [GUI] CheckButton  _custThemeToggle;
         [GUI] Entry        _custThemePath;
         [GUI] ToggleButton _browseThemePath;
@@ -197,6 +198,7 @@ namespace Ryujinx.Ui
             }
 
             _systemLanguageSelect.SetActiveId(ConfigurationState.Instance.System.Language.Value.ToString());
+            _systemRegionSelect  .SetActiveId(ConfigurationState.Instance.System.Region.Value.ToString());
             _controller1Type     .SetActiveId(ConfigurationState.Instance.Hid.ControllerType.Value.ToString());
             Controller_Changed(null, null, _controller1Type.ActiveId, _controller1Image);
 
@@ -232,6 +234,7 @@ namespace Ryujinx.Ui
             _gameDirsBox.AppendColumn("", new CellRendererText(), "text", 0);
             _gameDirsBoxStore  = new ListStore(typeof(string));
             _gameDirsBox.Model = _gameDirsBoxStore;
+
             foreach (string gameDir in ConfigurationState.Instance.Ui.GameDirs.Value)
             {
                 _gameDirsBoxStore.AppendValues(gameDir);
@@ -438,6 +441,7 @@ namespace Ryujinx.Ui
             };
 
             ConfigurationState.Instance.System.Language.Value              = (Language)Enum.Parse(typeof(Language), _systemLanguageSelect.ActiveId);
+            ConfigurationState.Instance.System.Region.Value                = (Configuration.System.Region)Enum.Parse(typeof(Configuration.System.Region), _systemRegionSelect.ActiveId);
             ConfigurationState.Instance.Hid.ControllerType.Value           = (ControllerType)Enum.Parse(typeof(ControllerType), _controller1Type.ActiveId);
             ConfigurationState.Instance.Ui.CustomThemePath.Value           = _custThemePath.Buffer.Text;
             ConfigurationState.Instance.Graphics.ShadersDumpPath.Value     = _graphicsShadersDumpPath.Buffer.Text;
diff --git a/Ryujinx/Ui/SwitchSettings.glade b/Ryujinx/Ui/SwitchSettings.glade
index 6128a3ce..a23bc199 100644
--- a/Ryujinx/Ui/SwitchSettings.glade
+++ b/Ryujinx/Ui/SwitchSettings.glade
@@ -166,6 +166,43 @@
                                         <property name="position">1</property>
                                       </packing>
                                     </child>
+                                    <child>
+                                      <object class="GtkLabel">
+                                        <property name="visible">True</property>
+                                        <property name="can_focus">False</property>
+                                        <property name="tooltip_text" translatable="yes">Change System Region</property>
+                                        <property name="halign">end</property>
+                                        <property name="label" translatable="yes">System Region:</property>
+                                      </object>
+                                      <packing>
+                                        <property name="expand">False</property>
+                                        <property name="fill">True</property>
+                                        <property name="position">2</property>
+                                        <property name="padding">5</property>
+                                      </packing>
+                                    </child>
+                                    <child>
+                                      <object class="GtkComboBoxText" id="_systemRegionSelect">
+                                        <property name="visible">True</property>
+                                        <property name="can_focus">False</property>
+                                        <property name="tooltip_text" translatable="yes">Change System Region</property>
+                                        <property name="margin_left">5</property>
+                                        <items>
+                                          <item id="Japan" translatable="yes">Japan</item>
+                                          <item id="USA" translatable="yes">USA</item>
+                                          <item id="Europe" translatable="yes">Europe</item>
+                                          <item id="Australia" translatable="yes">Australia</item>
+                                          <item id="China" translatable="yes">China</item>
+                                          <item id="Korea" translatable="yes">Korea</item>
+                                          <item id="Taiwan" translatable="yes">Taiwan</item>
+                                        </items>
+                                      </object>
+                                      <packing>
+                                        <property name="expand">False</property>
+                                        <property name="fill">True</property>
+                                        <property name="position">3</property>
+                                      </packing>
+                                    </child>
                                   </object>
                                   <packing>
                                     <property name="expand">False</property>
diff --git a/Ryujinx/_schema.json b/Ryujinx/_schema.json
index f0321f84..143716b6 100644
--- a/Ryujinx/_schema.json
+++ b/Ryujinx/_schema.json
@@ -15,6 +15,7 @@
     "logging_filtered_classes",
     "enable_file_log",
     "system_language",
+    "system_region",
     "docked_mode",
     "enable_vsync",
     "enable_multicore_scheduling",
@@ -402,6 +403,25 @@
         "AmericanEnglish"
       ]
     },
+    "system_region": {
+      "$id": "#/properties/system_region",
+      "type": "string",
+      "title": "System Region",
+      "description": "Change System Region",
+      "default": "USA",
+      "enum": [
+        "Japan",
+        "USA",
+        "Europe",
+        "Australia",
+        "China",
+        "Korea",
+        "Taiwan"
+      ],
+      "examples": [
+        "USA"
+      ]
+    },
     "docked_mode": {
       "$id": "#/properties/docked_mode",
       "type": "boolean",