M src/platform/qt/GBAApp.cpp → src/platform/qt/GBAApp.cpp

@@ -22,6 +22,7 @@ ConfigurationInit(&config);
 	GBAConfigLoad(&config);
 
 	GBAConfigMapGeneralOpts(&config, PORT, &m_opts);
+	GBAConfigMapGraphicsOpts(&config, PORT, &m_opts);
 
 	ConfigurationDeinit(&config);
 

M src/platform/qt/Window.cpp → src/platform/qt/Window.cpp

@@ -126,6 +126,10 @@
 	if (opts->audioBuffers) {
 		emit audioBufferSamplesChanged(opts->audioBuffers);
 	}
+
+	if (opts->width && opts->height) {
+		m_screenWidget->setSizeHint(QSize(opts->width, opts->height));
+	}
 }
 
 void Window::selectROM() {