Qt: Make display driver configurable

src/platform/qt/Display.cpp

@@ -5,12 +5,45 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "Display.h"
 
+#include "DisplayGL.h"
+#include "DisplayQt.h"
+
 extern "C" {
 #include "gba/video.h"
 }
 
 using namespace QGBA;
 
+#ifdef BUILD_GL
+Display::Driver Display::s_driver = Display::Driver::OPENGL;
+#else
+Display::Driver Display::s_driver = Display::Driver::QT;
+#endif
+
+Display* Display::create(QWidget* parent) {
+#ifdef BUILD_GL
+	QGLFormat format(QGLFormat(QGL::Rgba | QGL::DoubleBuffer));
+	format.setSwapInterval(1);
+#endif
+
+	switch (s_driver) {
+#ifdef BUILD_GL
+	case Driver::OPENGL:
+		return new DisplayGL(format, parent);
+#endif
+
+	case Driver::QT:
+		return new DisplayQt(parent);
+
+	default:
+#ifdef BUILD_GL
+		return new DisplayGL(format, parent);
+#else
+		return new DisplayQt(parent);
+#endif
+	}
+}
+
 Display::Display(QWidget* parent)
 	: QWidget(parent)
 {

src/platform/qt/Display.h

@@ -16,8 +16,18 @@ class Display : public QWidget {
 Q_OBJECT
 
 public:
+	enum class Driver {
+		QT = 0,
+#ifdef BUILD_GL
+		OPENGL = 1,
+#endif
+	};
+
 	Display(QWidget* parent = nullptr);
 
+	static Display* create(QWidget* parent = nullptr);
+	static void setDriver(Driver driver) { s_driver = driver; }
+
 public slots:
 	virtual void startDrawing(GBAThread* context) = 0;
 	virtual void stopDrawing() = 0;
@@ -29,6 +39,9 @@ public slots:
 	virtual void framePosted(const uint32_t*) = 0;
 
 	virtual void showMessage(const QString& message) = 0;
+
+private:
+	static Driver s_driver;
 };
 
 }

src/platform/qt/GBAApp.cpp

@@ -6,6 +6,7 @@
 #include "GBAApp.h"
 
 #include "AudioProcessor.h"
+#include "Display.h"
 #include "GameController.h"
 #include "Window.h"
 
@@ -55,6 +56,7 @@ GBAApp::GBAApp(int& argc, char* argv[])
 	}
 	freeArguments(&args);
 
+	Display::setDriver(static_cast<Display::Driver>(m_configController.getQtOption("videoDriver").toInt()));
 	AudioProcessor::setDriver(static_cast<AudioProcessor::Driver>(m_configController.getQtOption("audioDriver").toInt()));
 	w->controller()->reloadAudioDriver();
 

src/platform/qt/Window.cpp

@@ -15,7 +15,7 @@
 
 #include "CheatsView.h"
 #include "ConfigController.h"
-#include "DisplayGL.h"
+#include "Display.h"
 #include "GameController.h"
 #include "GBAApp.h"
 #include "GBAKeyEditor.h"
@@ -73,9 +73,7 @@ Window::Window(ConfigController* config, int playerId, QWidget* parent)
 	m_controller->setOverrides(m_config->overrides());
 	updateTitle();
 
-	QGLFormat format(QGLFormat(QGL::Rgba | QGL::DoubleBuffer));
-	format.setSwapInterval(1);
-	m_display = new DisplayGL(format, this);
+	m_display = Display::create(this);
 
 	m_logo.setDevicePixelRatio(m_screenWidget->devicePixelRatio());
 	m_logo = m_logo; // Free memory left over in old pixmap