diff --git a/Source/Core/Common/GL/GLInterface/AGL.h b/Source/Core/Common/GL/GLInterface/AGL.h
index b08b7ec802..f9aeb77a95 100644
--- a/Source/Core/Common/GL/GLInterface/AGL.h
+++ b/Source/Core/Common/GL/GLInterface/AGL.h
@@ -13,15 +13,15 @@
 class cInterfaceAGL : public cInterfaceBase
 {
 private:
-	NSView *cocoaWin;
-	NSOpenGLContext *cocoaCtx;
+	NSView* cocoaWin;
+	NSOpenGLContext* cocoaCtx;
 public:
-	void Swap();
-	bool Create(void *window_handle, bool core);
-	bool MakeCurrent();
-	bool ClearCurrent();
-	void Shutdown();
-	void Update();
-	void SwapInterval(int interval);
+	void Swap() override;
+	bool Create(void* window_handle, bool core) override;
+	bool MakeCurrent() override;
+	bool ClearCurrent() override;
+	void Shutdown() override;
+	void Update() override;
+	void SwapInterval(int interval) override;
 
 };
diff --git a/Source/Core/Common/GL/GLInterface/EGL.cpp b/Source/Core/Common/GL/GLInterface/EGL.cpp
index 8f42c98253..202568b2e9 100644
--- a/Source/Core/Common/GL/GLInterface/EGL.cpp
+++ b/Source/Core/Common/GL/GLInterface/EGL.cpp
@@ -25,7 +25,7 @@ void* cInterfaceEGL::GetFuncAddress(const std::string& name)
 
 void cInterfaceEGL::DetectMode()
 {
-	if (s_opengl_mode != MODE_DETECT)
+	if (s_opengl_mode != GLInterfaceMode::MODE_DETECT)
 		return;
 
 	EGLint num_configs;
@@ -136,15 +136,15 @@ bool cInterfaceEGL::Create(void *window_handle, bool core)
 	};
 	switch (s_opengl_mode)
 	{
-		case MODE_OPENGL:
+		case GLInterfaceMode::MODE_OPENGL:
 			attribs[1] = EGL_OPENGL_BIT;
 			ctx_attribs[0] = EGL_NONE;
 		break;
-		case MODE_OPENGLES2:
+		case GLInterfaceMode::MODE_OPENGLES2:
 			attribs[1] = EGL_OPENGL_ES2_BIT;
 			ctx_attribs[1] = 2;
 		break;
-		case MODE_OPENGLES3:
+		case GLInterfaceMode::MODE_OPENGLES3:
 			attribs[1] = (1 << 6); /* EGL_OPENGL_ES3_BIT_KHR */
 			ctx_attribs[1] = 3;
 		break;
@@ -160,7 +160,7 @@ bool cInterfaceEGL::Create(void *window_handle, bool core)
 		exit(1);
 	}
 
-	if (s_opengl_mode == MODE_OPENGL)
+	if (s_opengl_mode == GLInterfaceMode::MODE_OPENGL)
 		eglBindAPI(EGL_OPENGL_API);
 	else
 		eglBindAPI(EGL_OPENGL_ES_API);
diff --git a/Source/Core/Common/GL/GLInterface/EGL.h b/Source/Core/Common/GL/GLInterface/EGL.h
index f25b129d90..21f563f861 100644
--- a/Source/Core/Common/GL/GLInterface/EGL.h
+++ b/Source/Core/Common/GL/GLInterface/EGL.h
@@ -21,12 +21,12 @@ protected:
 	virtual EGLNativeWindowType InitializePlatform(EGLNativeWindowType host_window, EGLConfig config) = 0;
 	virtual void ShutdownPlatform() = 0;
 public:
-	void SwapInterval(int Interval);
-	void Swap();
-	void SetMode(u32 mode) { s_opengl_mode = mode; }
-	void* GetFuncAddress(const std::string& name);
-	bool Create(void *window_handle, bool core);
-	bool MakeCurrent();
-	bool ClearCurrent();
-	void Shutdown();
+	void Swap() override;
+	void SwapInterval(int interval) override;
+	void SetMode(GLInterfaceMode mode) override { s_opengl_mode = mode; }
+	void* GetFuncAddress(const std::string& name) override;
+	bool Create(void* window_handle, bool core) override;
+	bool MakeCurrent() override;
+	bool ClearCurrent() override;
+	void Shutdown() override;
 };
diff --git a/Source/Core/Common/GL/GLInterface/WGL.h b/Source/Core/Common/GL/GLInterface/WGL.h
index 6a1b8c133e..b82a521b16 100644
--- a/Source/Core/Common/GL/GLInterface/WGL.h
+++ b/Source/Core/Common/GL/GLInterface/WGL.h
@@ -10,16 +10,17 @@
 class cInterfaceWGL : public cInterfaceBase
 {
 public:
-	void SwapInterval(int Interval);
-	void Swap();
-	void* GetFuncAddress(const std::string& name);
-	bool Create(void *window_handle, bool core);
-	bool MakeCurrent();
-	bool ClearCurrent();
-	void Shutdown();
+	void SwapInterval(int interval) override;
+	void Swap() override;
+	void* GetFuncAddress(const std::string& name) override;
+	bool Create(void* window_handle, bool core) override;
+	bool MakeCurrent() override;
+	bool ClearCurrent() override;
+	void Shutdown() override;
 
-	void Update();
-	bool PeekMessages();
+	void Update() override;
+	bool PeekMessages() override;
 
-	HWND m_window_handle;
+private:
+	HWND m_window_handle = nullptr;
 };
diff --git a/Source/Core/Common/GL/GLInterfaceBase.h b/Source/Core/Common/GL/GLInterfaceBase.h
index 8fed61f0d4..d7885635bb 100644
--- a/Source/Core/Common/GL/GLInterfaceBase.h
+++ b/Source/Core/Common/GL/GLInterfaceBase.h
@@ -9,8 +9,9 @@
 
 #include "Common/CommonTypes.h"
 
-enum GLInterfaceMode {
-	MODE_DETECT = 0,
+enum class GLInterfaceMode
+{
+	MODE_DETECT,
 	MODE_OPENGL,
 	MODE_OPENGLES2,
 	MODE_OPENGLES3,
@@ -20,15 +21,15 @@ class cInterfaceBase
 {
 protected:
 	// Window dimensions.
-	u32 s_backbuffer_width;
-	u32 s_backbuffer_height;
+	u32 s_backbuffer_width = 0;
+	u32 s_backbuffer_height = 0;
 
-	u32 s_opengl_mode;
+	GLInterfaceMode s_opengl_mode = GLInterfaceMode::MODE_DETECT;
 public:
 	virtual ~cInterfaceBase() {}
 	virtual void Swap() {}
-	virtual void SetMode(u32 mode) { s_opengl_mode = GLInterfaceMode::MODE_OPENGL; }
-	virtual u32 GetMode() { return s_opengl_mode; }
+	virtual void SetMode(GLInterfaceMode mode) { s_opengl_mode = GLInterfaceMode::MODE_OPENGL; }
+	virtual GLInterfaceMode GetMode() { return s_opengl_mode; }
 	virtual void* GetFuncAddress(const std::string& name) { return nullptr; }
 	virtual bool Create(void *window_handle, bool core = true) { return true; }
 	virtual bool MakeCurrent() { return true; }