Qt: Add runtime downloading of CJK OSD fonts

.gitignore

@@ -85,6 +85,13 @@ oprofile_data/
 /bin/textures
 /bin/translations
 /bin/inputprofiles
+
+# Resources that are runtime downloaded.
+/bin/resources/NotoSansJP-Regular.ttf
+/bin/resources/NotoSansKR-Regular.ttf
+/bin/resources/NotoSansSC-Regular.ttf
+/bin/resources/NotoSansTC-Regular.ttf
+
 /deps
 /ipch
 

pcsx2-qt/MainWindow.cpp

@@ -1644,7 +1644,10 @@ void MainWindow::reloadThemeSpecificImages()
 
 void MainWindow::updateLanguage()
 {
-	QtHost::InstallTranslator();
+	// Remove the settings window, so it doesn't mess with any popups that happen (e.g. font download).
+	destroySubWindows();
+
+	QtHost::InstallTranslator(this);
 	recreate();
 }
 
@@ -2885,6 +2888,12 @@ MainWindow::VMLock MainWindow::pauseAndLockVM()
 	// Now we'll either have a borderless window, or a regular window (if we were exclusive fullscreen).
 	QWidget* dialog_parent = getDisplayContainer();
 
+	// Ensure main window is visible.
+	if (!g_main_window->isVisible())
+		g_main_window->show();
+	g_main_window->raise();
+	g_main_window->activateWindow();
+
 	return VMLock(dialog_parent, was_paused, was_fullscreen);
 }
 
@@ -2922,6 +2931,19 @@ MainWindow::VMLock::~VMLock()
 		g_emu_thread->setVMPaused(false);
 }
 
+MainWindow::VMLock& MainWindow::VMLock::operator=(VMLock&& lock)
+{
+	m_dialog_parent = lock.m_dialog_parent;
+	m_was_paused = lock.m_was_paused;
+	m_was_fullscreen = lock.m_was_fullscreen;
+
+	lock.m_dialog_parent = nullptr;
+	lock.m_was_paused = true;
+	lock.m_was_fullscreen = false;
+
+	return *this;
+}
+
 void MainWindow::VMLock::cancelResume()
 {
 	m_was_paused = true;

pcsx2-qt/MainWindow.h

@@ -54,6 +54,9 @@ public:
 		VMLock(const VMLock&) = delete;
 		~VMLock();
 
+		VMLock& operator=(VMLock&& lock);
+		VMLock& operator=(const VMLock&) = delete;
+
 		/// Returns the parent widget, which can be used for any popup dialogs.
 		__fi QWidget* getDialogParent() const { return m_dialog_parent; }
 

pcsx2-qt/QtHost.cpp

@@ -1242,7 +1242,7 @@ bool QtHost::InitializeConfig()
 
 	LogSink::SetBlockSystemConsole(QtHost::InNoGUIMode());
 	VMManager::Internal::LoadStartupSettings();
-	InstallTranslator();
+	InstallTranslator(nullptr);
 	return true;
 }
 

pcsx2-qt/QtHost.h

@@ -259,7 +259,7 @@ namespace QtHost
 	std::vector<std::pair<QString, QString>> GetAvailableLanguageList();
 
 	/// Call when the language changes.
-	void InstallTranslator();
+	void InstallTranslator(QWidget* dialog_parent);
 
 	/// Returns the application name and version, optionally including debug/devel config indicator.
 	QString GetAppNameAndVersion();

pcsx2-qt/SetupWizardDialog.cpp

@@ -203,7 +203,7 @@ void SetupWizardDialog::themeChanged()
 void SetupWizardDialog::languageChanged()
 {
 	// Skip the recreation, since we don't have many dynamic UI elements.
-	QtHost::InstallTranslator();
+	QtHost::InstallTranslator(this);
 	m_ui.retranslateUi(this);
 }
 

pcsx2/ImGui/ImGuiManager.cpp

@@ -393,10 +393,8 @@ bool ImGuiManager::LoadFontData()
 {
 	if (s_standard_font_data.empty())
 	{
-		std::optional<std::vector<u8>> font_data =
+		pxAssertRel(!s_font_path.empty(), "Font path has not been set.");
-			s_font_path.empty() ? FileSystem::ReadBinaryFile(
+		std::optional<std::vector<u8>> font_data = FileSystem::ReadBinaryFile(s_font_path.c_str());
-									  EmuFolders::GetOverridableResourcePath("fonts" FS_OSPATH_SEPARATOR_STR "Roboto-Regular.ttf").c_str()) :
-								  FileSystem::ReadBinaryFile(s_font_path.c_str());
 		if (!font_data.has_value())
 			return false;