Qt: Simplify OpenGL context creation

CHANGES

@@ -18,6 +18,7 @@ Misc:
  - OpenGL: Add texSize uniform
  - ARM7: Clean up instruction decoding for future expandability
  - Qt: Make -g flag work in Qt build
+ - Qt: Simplify OpenGL context creation
 
 0.4.1: (2016-07-11)
 Bugfixes:

src/platform/qt/Display.cpp

@@ -29,11 +29,13 @@ Display* Display::create(QWidget* parent) {
 	switch (s_driver) {
 #if defined(BUILD_GL) || defined(BUILD_GLES2) || defined(USE_EPOXY)
 	case Driver::OPENGL:
-		return new DisplayGL(format, false, parent);
+		format.setVersion(3, 0);
+		return new DisplayGL(format, parent);
 #endif
 #ifdef BUILD_GL
 	case Driver::OPENGL1:
-		return new DisplayGL(format, true, parent);
+		format.setVersion(1, 4);
+		return new DisplayGL(format, parent);
 #endif
 
 	case Driver::QT:
@@ -41,7 +43,8 @@ Display* Display::create(QWidget* parent) {
 
 	default:
 #if defined(BUILD_GL) || defined(BUILD_GLES2) || defined(USE_EPOXY)
-		return new DisplayGL(format, false, parent);
+		format.setVersion(3, 0);
+		return new DisplayGL(format, parent);
 #else
 		return new DisplayQt(parent);
 #endif

src/platform/qt/DisplayGL.cpp

@@ -24,22 +24,14 @@ extern "C" {
 
 using namespace QGBA;
 
-DisplayGL::DisplayGL(const QGLFormat& format, bool force1, QWidget* parent)
+DisplayGL::DisplayGL(const QGLFormat& format, QWidget* parent)
 	: Display(parent)
 	, m_isDrawing(false)
 	, m_gl(new EmptyGLWidget(format, this))
 	, m_drawThread(nullptr)
 	, m_context(nullptr)
 {
-	QGLFormat::OpenGLVersionFlags versions = QGLFormat::openGLVersionFlags();
+	m_painter = new PainterGL(format.majorVersion(), m_gl);
-	if (force1) {
-		versions &= QGLFormat::OpenGL_Version_1_1 |
-		            QGLFormat::OpenGL_Version_1_2 |
-		            QGLFormat::OpenGL_Version_1_3 |
-		            QGLFormat::OpenGL_Version_1_4 |
-		            QGLFormat::OpenGL_Version_1_5;
-	}
-	m_painter = new PainterGL(m_gl, versions);
 	m_gl->setMouseTracking(true);
 	m_gl->setAttribute(Qt::WA_TransparentForMouseEvents); // This doesn't seem to work?
 }
@@ -179,7 +171,7 @@ void DisplayGL::resizePainter() {
 	}
 }
 
-PainterGL::PainterGL(QGLWidget* parent, QGLFormat::OpenGLVersionFlags glVersion)
+PainterGL::PainterGL(int majorVersion, QGLWidget* parent)
 	: m_gl(parent)
 	, m_active(false)
 	, m_started(false)
@@ -196,7 +188,7 @@ PainterGL::PainterGL(QGLWidget* parent, QGLFormat::OpenGLVersionFlags glVersion)
 #endif
 
 #if !defined(_WIN32) || defined(USE_EPOXY)
-	if (glVersion & (QGLFormat::OpenGL_Version_3_0 | QGLFormat::OpenGL_ES_Version_2_0)) {
+	if (majorVersion >= 2) {
 		gl2Backend = new mGLES2Context;
 		mGLES2ContextCreate(gl2Backend);
 		m_backend = &gl2Backend->d;

src/platform/qt/DisplayGL.h

@@ -43,7 +43,7 @@ class DisplayGL : public Display {
 Q_OBJECT
 
 public:
-	DisplayGL(const QGLFormat& format, bool force1 = false, QWidget* parent = nullptr);
+	DisplayGL(const QGLFormat& format, QWidget* parent = nullptr);
 	~DisplayGL();
 
 	bool isDrawing() const override { return m_isDrawing; }
@@ -80,7 +80,7 @@ class PainterGL : public QObject {
 Q_OBJECT
 
 public:
-	PainterGL(QGLWidget* parent, QGLFormat::OpenGLVersionFlags = QGLFormat::OpenGL_Version_1_1);
+	PainterGL(int majorVersion, QGLWidget* parent);
 	~PainterGL();
 
 	void setContext(mCoreThread*);