Get emulator rendering working with Qt

src/panda_qt/main_window.cpp

@@ -4,7 +4,7 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	setWindowTitle("Alber");
 	// Enable drop events for loading ROMs
 	setAcceptDrops(true);
-	resize(320, 240);
+	resize(400, 240 * 2);
 	screen.show();
 
 	// Set our menu bar up
@@ -25,9 +25,42 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	themeSelect->setGeometry(40, 40, 100, 50);
 	themeSelect->show();
 	connect(themeSelect, &QComboBox::currentIndexChanged, this, [&](int index) { setTheme(static_cast<Theme>(index)); });
+
+	emu = new Emulator();
+
+	// 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;
+
+		if (rendererType == RendererType::OpenGL || rendererType == RendererType::Software) {
+			// Make GL context current for this thread, enable VSync
+			GL::Context* glContext = screen.getGLContext();
+			glContext->MakeCurrent();
+			glContext->SetSwapInterval(1);
+
+			emu->initGraphicsContext(glContext);
+		} else if (rendererType != RendererType::Null) {
+			Helpers::panic("Unsupported renderer type for the Qt backend! Vulkan on Qt is currently WIP, try the SDL frontend instead!");
+		}
+
+		bool success = emu->loadROM("OoT.3ds");
+		if (!success) {
+			Helpers::panic("Failed to load ROM");
+		}
+
+		while (true) {
+			emu->runFrame();
+			screen.getGLContext()->SwapBuffers();
+		}
+	});
 }
 
-MainWindow::~MainWindow() { delete menuBar; }
+// Cleanup when the main window closes
+MainWindow::~MainWindow() {
+	delete emu;
+	delete menuBar;
+	delete themeSelect;
+}
 
 void MainWindow::setTheme(Theme theme) {
 	currentTheme = theme;

src/panda_qt/screen.cpp

@@ -20,7 +20,7 @@
 #ifdef PANDA3DS_ENABLE_OPENGL
 ScreenWidget::ScreenWidget(QWidget* parent) : QWidget(parent) {
 	// Create a native window for use with our graphics API of choice
-	resize(320, 240);
+	resize(400, 240 * 2);
 	
 	setAutoFillBackground(false);
 	setAttribute(Qt::WA_NativeWindow, true);
@@ -33,18 +33,6 @@ ScreenWidget::ScreenWidget(QWidget* parent) : QWidget(parent) {
 	if (!createGLContext()) {
 		Helpers::panic("Failed to create GL context for display");
 	}
-
-	// Make our context current to use it
-	glContext->MakeCurrent();
-	// Enable VSync for now
-	glContext->SetSwapInterval(1);
-
-	OpenGL::setViewport(320, 240);
-	OpenGL::setClearColor(1.0, 0.0, 0.0, 1.0);
-	OpenGL::clearColor();
-
-	// Swap buffers to display our red as a test
-	glContext->SwapBuffers();
 }
 
 bool ScreenWidget::createGLContext() {