[Qt] Be a little less OpenGL-hyperfocused

include/panda_qt/main_window.hpp

@@ -30,6 +30,11 @@ class MainWindow : public QMainWindow {
 
 	Theme currentTheme;
 	void setTheme(Theme theme);
+	void swapEmuBuffer();
+
+	// Tracks whether we are using an OpenGL-backed renderer or a Vulkan-backed renderer
+	bool usingGL = false;
+	bool usingVk = false;
 
   public:
 	MainWindow(QApplication* app, QWidget* parent = nullptr);

src/panda_qt/main_window.cpp

@@ -32,16 +32,20 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	// The emulator graphics context for the thread should be initialized in the emulator thread due to how GL contexts work 
 	emuThread = std::thread([&]() {
 		const RendererType rendererType = emu->getConfig().rendererType;
+		usingGL = (rendererType == RendererType::OpenGL || rendererType == RendererType::Software || rendererType == RendererType::Null);
+		usingVk = (rendererType == RendererType::Vulkan);
 
-		if (rendererType == RendererType::OpenGL || rendererType == RendererType::Software || rendererType == RendererType::Null) {
+		if (usingGL) {
 			// Make GL context current for this thread, enable VSync
 			GL::Context* glContext = screen.getGLContext();
 			glContext->MakeCurrent();
 			glContext->SetSwapInterval(1);
 
 			emu->initGraphicsContext(glContext);
+		} else if (usingVk) {
+			Helpers::panic("Vulkan on Qt is currently WIP, try the SDL frontend instead!");
 		} else {
-			Helpers::panic("Unsupported renderer type for the Qt backend! Vulkan on Qt is currently WIP, try the SDL frontend instead!");
+			Helpers::panic("Unsupported graphics backend for Qt frontend!");
 		}
 
 		bool success = emu->loadROM("OoT.3ds");
@@ -51,11 +55,19 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 
 		while (true) {
 			emu->runFrame();
-			screen.getGLContext()->SwapBuffers();
+			swapEmuBuffer();
 		}
 	});
 }
 
+void MainWindow::swapEmuBuffer() {
+	if (usingGL) {
+		screen.getGLContext()->SwapBuffers();
+	} else {
+		Helpers::panic("[Qt] Don't know how to swap buffers for the current rendering backend :(");
+	}
+}
+
 // Cleanup when the main window closes
 MainWindow::~MainWindow() {
 	delete emu;