Added logic to allow switching the Qt GUI video driver while program is running with out needing a restart... although a restart is still probably the safest.

src/drivers/Qt/ConsoleVideoConf.cpp

@@ -747,6 +747,11 @@ void ConsoleVideoConfDialog_t::driverChanged(int index)
 	g_config->save ();
 
 	printf("Note: A restart of the application is needed for video driver change to take effect...\n");
+
+	if ( consoleWindow )
+	{
+		consoleWindow->loadVideoDriver( driver );
+	}
 }
 //----------------------------------------------------
 void ConsoleVideoConfDialog_t::scalerChanged(int index)

src/drivers/Qt/ConsoleViewerGL.cpp

@@ -103,20 +103,6 @@ ConsoleViewGL_t::ConsoleViewGL_t(QWidget *parent)
 
 ConsoleViewGL_t::~ConsoleViewGL_t(void)
 {
-	// Make sure the context is current and then explicitly
-    // destroy all underlying OpenGL resources.
-    makeCurrent();
-
-	 // Free GL texture
-	 if (gltexture) 
-	 {
-	 	//printf("Destroying GL Texture\n");
-	 	glDeleteTextures(1, &gltexture);
-	 	gltexture=0;
-	 }
-
-	 doneCurrent();
-
 	if ( localBuf )
 	{
 		free( localBuf ); localBuf = NULL;
@@ -160,6 +146,7 @@ void ConsoleViewGL_t::buildTextures(void)
 
 void ConsoleViewGL_t::initializeGL(void)
 {
+	//printf("initializeGL\n");
 
 	initializeOpenGLFunctions();
 	// Set up the rendering context, load shaders and other resources, etc.:
@@ -169,6 +156,26 @@ void ConsoleViewGL_t::initializeGL(void)
 	 //printf("GL Init!\n");
 
 	 buildTextures();
+
+	 connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ConsoleViewGL_t::cleanupGL);
+}
+
+void ConsoleViewGL_t::cleanupGL(void)
+{
+	//printf("cleanupGL\n");
+	// Make sure the context is current and then explicitly
+	// destroy all underlying OpenGL resources.
+	makeCurrent();
+
+	 // Free GL texture
+	 if (gltexture) 
+	 {
+	 	//printf("Destroying GL Texture\n");
+	 	glDeleteTextures(1, &gltexture);
+	 	gltexture=0;
+	 }
+
+	 doneCurrent();
 }
 
 void ConsoleViewGL_t::resizeGL(int w, int h)

src/drivers/Qt/ConsoleViewerGL.h

@@ -69,5 +69,6 @@ class ConsoleViewGL_t : public QOpenGLWidget, protected QOpenGLFunctions
 	uint32_t   localBufSize;
 
 	private slots:
+		void cleanupGL(void);
 };
 

src/drivers/Qt/ConsoleViewerSDL.cpp

@@ -44,6 +44,7 @@ ConsoleViewSDL_t::ConsoleViewSDL_t(QWidget *parent)
 	setMinimumWidth( 256 );
 	setMinimumHeight( 224 );
 	setFocusPolicy(Qt::StrongFocus);
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 
 	view_width  = GL_NES_WIDTH;
 	view_height = GL_NES_HEIGHT;
@@ -103,6 +104,7 @@ ConsoleViewSDL_t::~ConsoleViewSDL_t(void)
 	{
 		free( localBuf ); localBuf = NULL;
 	}
+	cleanup();
 }
 
 void ConsoleViewSDL_t::setLinearFilterEnable( bool ena )

src/drivers/Qt/ConsoleWindow.cpp

@@ -38,6 +38,7 @@
 #include <QDesktopServices>
 #include <QStyleFactory>
 #include <QApplication>
+#include <QShortcut>
 #include <QUrl>
 
 #include "../../fceu.h"
@@ -555,6 +556,7 @@ void consoleWin_t::createMainMenu(void)
 	QMenu *subMenu;
 	QActionGroup *group;
 	int useNativeMenuBar;
+	//QShortcut *shortcut;
 	QStyle *style;
 
 	style   = this->style();
@@ -572,7 +574,7 @@ void consoleWin_t::createMainMenu(void)
 	fileMenu = menubar->addMenu(tr("&File"));
 
 	// File -> Open ROM
-	openROM = new QAction(tr("&Open ROM"), this);
+	openROM = new QAction(tr("&Open ROM\tCtrl+O"), this);
 	openROM->setShortcuts(QKeySequence::Open);
 	openROM->setStatusTip(tr("Open ROM File"));
 	//openROM->setIcon( QIcon(":icons/rom.png") );
@@ -580,6 +582,9 @@ void consoleWin_t::createMainMenu(void)
 	openROM->setIcon( style->standardIcon( QStyle::SP_FileDialogStart ) );
 	connect(openROM, SIGNAL(triggered()), this, SLOT(openROMFile(void)) );
 
+	//shortcut = new QShortcut( QKeySequence::Open, this );
+	//connect(shortcut, SIGNAL(activated()), this, SLOT(openROMFile(void)) );
+	
 	fileMenu->addAction(openROM);
 
 	// File -> Close ROM
@@ -1282,6 +1287,56 @@ void consoleWin_t::createMainMenu(void)
 	helpMenu->addAction(act);
 };
 //---------------------------------------------------------------------------
+int consoleWin_t::loadVideoDriver( int driverId )
+{
+	if ( driverId )
+	{  // SDL Driver
+		if ( viewport_SDL != NULL )
+		{  // Already Loaded
+			return 0;
+		}
+
+		if ( viewport_GL != NULL )
+		{
+			if ( viewport_GL == centralWidget() )
+			{
+				takeCentralWidget();
+			}
+			delete viewport_GL;
+
+			viewport_GL = NULL;
+		}
+		
+		viewport_SDL = new ConsoleViewSDL_t(this);
+
+		setCentralWidget(viewport_SDL);
+
+		viewport_SDL->init();
+	}
+	else
+	{  // OpenGL Driver
+		if ( viewport_GL != NULL )
+		{  // Already Loaded
+			return 0;
+		}
+
+		if ( viewport_SDL != NULL )
+		{
+			if ( viewport_SDL == centralWidget() )
+			{
+				takeCentralWidget();
+			}
+			delete viewport_SDL;
+
+			viewport_SDL = NULL;
+		}
+		viewport_GL = new ConsoleViewGL_t(this);
+
+		setCentralWidget(viewport_GL);
+	}
+	return 0;
+}
+//---------------------------------------------------------------------------
 void consoleWin_t::clearRomList(void)
 {
 	std::list <std::string*>::iterator it;

src/drivers/Qt/ConsoleWindow.h

@@ -113,6 +113,8 @@ class  consoleWin_t : public QMainWindow
 		int getMaxSchedPriority(void);
 		#endif
 
+		int loadVideoDriver( int driverId );
+
 		emulatorThread_t *emulatorThread;
 
 		void addRecentRom( const char *rom );