Make system language configurable

include/config.hpp

@@ -5,6 +5,7 @@
 #include "audio/dsp_core.hpp"
 #include "frontend_settings.hpp"
 #include "renderer.hpp"
+#include "services/region_codes.hpp"
 
 struct AudioDeviceConfig {
 	// Audio curve to use for volumes between 0-100
@@ -77,6 +78,8 @@ struct EmulatorConfig {
 	// Default to 3% battery to make users suffer
 	int batteryPercentage = 3;
 
+	LanguageCodes systemLanguage = LanguageCodes::English;
+
 	// Default ROM path to open in Qt and misc frontends
 	std::filesystem::path defaultRomPath = "";
 	std::filesystem::path filePath;
@@ -104,4 +107,7 @@ struct EmulatorConfig {
 	EmulatorConfig(const std::filesystem::path& path);
 	void load();
 	void save();
+
+	static LanguageCodes languageCodeFromString(std::string inString);
+	static const char* languageCodeToString(LanguageCodes code);
 };

include/services/cfg.hpp

@@ -1,6 +1,7 @@
 #pragma once
 #include <cstring>
 
+#include "config.hpp"
 #include "helpers.hpp"
 #include "logger.hpp"
 #include "memory.hpp"
@@ -11,6 +12,8 @@ class CFGService {
 	using Handle = HorizonHandle;
 
 	Memory& mem;
+	const EmulatorConfig& settings;
+
 	CountryCodes country = CountryCodes::US;  // Default to USA
 	MAKE_LOG_FUNCTION(log, cfgLogger)
 
@@ -45,7 +48,7 @@ class CFGService {
 		NOR,  // cfg:nor
 	};
 
-	CFGService(Memory& mem) : mem(mem) {}
+	CFGService(Memory& mem, const EmulatorConfig& settings) : mem(mem), settings(settings) {}
 	void reset();
 	void handleSyncRequest(u32 messagePointer, Type type);
 };

src/config.cpp

@@ -6,6 +6,7 @@
 #include <fstream>
 #include <map>
 #include <string>
+#include <unordered_map>
 
 #include "helpers.hpp"
 #include "toml.hpp"
@@ -45,6 +46,7 @@ void EmulatorConfig::load() {
 			defaultRomPath = toml::find_or<std::string>(general, "DefaultRomPath", "");
 
 			printAppVersion = toml::find_or<toml::boolean>(general, "PrintAppVersion", true);
+			systemLanguage = languageCodeFromString(toml::find_or<std::string>(general, "SystemLanguage", "en"));
 		}
 	}
 
@@ -169,6 +171,7 @@ void EmulatorConfig::save() {
 	data["General"]["UsePortableBuild"] = usePortableBuild;
 	data["General"]["DefaultRomPath"] = defaultRomPath.string();
 	data["General"]["PrintAppVersion"] = printAppVersion;
+	data["General"]["SystemLanguage"] = languageCodeToString(systemLanguage);
 
 	data["Window"]["AppVersionOnWindow"] = windowSettings.showAppVersion;
 	data["Window"]["RememberWindowPosition"] = windowSettings.rememberPosition;
@@ -231,4 +234,34 @@ const char* AudioDeviceConfig::volumeCurveToString(AudioDeviceConfig::VolumeCurv
 		case VolumeCurve::Cubic:
 		default: return "cubic";
 	}
+}
+
+LanguageCodes EmulatorConfig::languageCodeFromString(std::string inString) {  // Transform to lower-case to make the setting case-insensitive
+	std::transform(inString.begin(), inString.end(), inString.begin(), [](unsigned char c) { return std::tolower(c); });
+
+	static const std::unordered_map<std::string, LanguageCodes> map = {
+		{"ja", LanguageCodes::Japanese}, {"en", LanguageCodes::English},    {"fr", LanguageCodes::French},  {"de", LanguageCodes::German},
+		{"it", LanguageCodes::Italian},  {"es", LanguageCodes::Spanish},    {"zh", LanguageCodes::Chinese}, {"ko", LanguageCodes::Korean},
+		{"nl", LanguageCodes::Dutch},    {"pt", LanguageCodes::Portuguese}, {"ru", LanguageCodes::Russian}, {"tw", LanguageCodes::Taiwanese},
+	};
+
+	if (auto search = map.find(inString); search != map.end()) {
+		return search->second;
+	}
+
+	// Default to English if no language code in our map matches
+	return LanguageCodes::English;
+}
+
+const char* EmulatorConfig::languageCodeToString(LanguageCodes code) {
+	static constexpr std::array<const char*, 12> codes = {
+		"ja", "en", "fr", "de", "it", "es", "zh", "ko", "nl", "pt", "ru", "tw",
+	};
+
+	// Invalid country code, return english
+	if (static_cast<u32>(code) > static_cast<u32>(LanguageCodes::Taiwanese)) {
+		return "en";
+	} else {
+		return codes[static_cast<u32>(code)];
+	}
 }

src/core/services/cfg.cpp

@@ -140,7 +140,7 @@ void CFGService::getConfigInfo(u32 output, u32 blockID, u32 size, u32 permission
 	if (size == 1 && blockID == 0x70001) {  // Sound output mode
 		mem.write8(output, static_cast<u8>(DSPService::SoundOutputMode::Stereo));
 	} else if (size == 1 && blockID == 0xA0002) {  // System language
-		mem.write8(output, static_cast<u8>(LanguageCodes::English));
+		mem.write8(output, static_cast<u8>(settings.systemLanguage));
 	} else if (size == 4 && blockID == 0xB0000) {          // Country info
 		mem.write8(output, 0);                             // Unknown
 		mem.write8(output + 1, 0);                         // Unknown

src/core/services/service_manager.cpp

@@ -6,8 +6,8 @@
 #include "kernel.hpp"
 
 ServiceManager::ServiceManager(std::span<u32, 16> regs, Memory& mem, GPU& gpu, u32& currentPID, Kernel& kernel, const EmulatorConfig& config)
-	: regs(regs), mem(mem), kernel(kernel), ac(mem), am(mem), boss(mem), act(mem), apt(mem, kernel), cam(mem, kernel), cecd(mem, kernel), cfg(mem),
-	  csnd(mem, kernel), dlp_srvr(mem), dsp(mem, kernel, config), hid(mem, kernel), http(mem), ir_user(mem, kernel), frd(mem),
+	: regs(regs), mem(mem), kernel(kernel), ac(mem), am(mem), boss(mem), act(mem), apt(mem, kernel), cam(mem, kernel), cecd(mem, kernel),
+	  cfg(mem, config), csnd(mem, kernel), dlp_srvr(mem), dsp(mem, kernel, config), hid(mem, kernel), http(mem), ir_user(mem, kernel), frd(mem),
 	  fs(mem, kernel, config), gsp_gpu(mem, gpu, kernel, currentPID), gsp_lcd(mem), ldr(mem, kernel), mcu_hwc(mem, config), mic(mem, kernel),
 	  nfc(mem, kernel), nim(mem), ndm(mem), news_u(mem), ns(mem), nwm_uds(mem, kernel), ptm(mem, config), soc(mem), ssl(mem), y2r(mem, kernel) {}
 

src/panda_qt/config_window.cpp

@@ -145,6 +145,27 @@ ConfigWindow::ConfigWindow(ConfigCallback configCallback, MainWindowCallback win
 	romLayout->addWidget(browseRomPath);
 	genLayout->addRow(tr("Default ROMs path"), romLayout);
 
+	QComboBox* systemLanguage = new QComboBox();
+	systemLanguage->addItem(tr("Japanese"));
+	systemLanguage->addItem(tr("English"));
+	systemLanguage->addItem(tr("French"));
+	systemLanguage->addItem(tr("German"));
+	systemLanguage->addItem(tr("Italian"));
+	systemLanguage->addItem(tr("Spanish"));
+	systemLanguage->addItem(tr("Chinese"));
+	systemLanguage->addItem(tr("Korean"));
+	systemLanguage->addItem(tr("Dutch"));
+	systemLanguage->addItem(tr("Portuguese"));
+	systemLanguage->addItem(tr("Russian"));
+	systemLanguage->addItem(tr("Taiwanese"));
+
+	systemLanguage->setCurrentIndex(static_cast<int>(config.systemLanguage));
+	connect(systemLanguage, &QComboBox::currentIndexChanged, this, [&](int index) {
+		config.systemLanguage = static_cast<LanguageCodes>(index);
+		updateConfig();
+	});
+	genLayout->addRow(tr("System language"), systemLanguage);
+
 	QCheckBox* discordRpcEnabled = new QCheckBox(tr("Enable Discord RPC"));
 	connectCheckbox(discordRpcEnabled, config.discordRpcEnabled);
 	genLayout->addRow(discordRpcEnabled);
@@ -163,7 +184,7 @@ ConfigWindow::ConfigWindow(ConfigCallback configCallback, MainWindowCallback win
 	gpuLayout->setHorizontalSpacing(20);
 	gpuLayout->setVerticalSpacing(10);
 
-	QComboBox* rendererType = new QComboBox;
+	QComboBox* rendererType = new QComboBox();
 	rendererType->addItem(tr("Null"));
 	rendererType->addItem(tr("OpenGL"));
 	rendererType->addItem(tr("Vulkan"));
@@ -217,7 +238,7 @@ ConfigWindow::ConfigWindow(ConfigCallback configCallback, MainWindowCallback win
 	audioLayout->setHorizontalSpacing(20);
 	audioLayout->setVerticalSpacing(10);
 
-	QComboBox* dspType = new QComboBox;
+	QComboBox* dspType = new QComboBox();
 	dspType->addItem(tr("Null"));
 	dspType->addItem(tr("LLE"));
 	dspType->addItem(tr("HLE"));
@@ -244,7 +265,7 @@ ConfigWindow::ConfigWindow(ConfigCallback configCallback, MainWindowCallback win
 	connectCheckbox(muteAudio, config.audioDeviceConfig.muteAudio);
 	audioLayout->addRow(muteAudio);
 
-	QComboBox* volumeCurveType = new QComboBox;
+	QComboBox* volumeCurveType = new QComboBox();
 	volumeCurveType->addItem(tr("Cubic"));
 	volumeCurveType->addItem(tr("Linear"));
 	volumeCurveType->setCurrentIndex(static_cast<int>(config.audioDeviceConfig.volumeCurve));