Rename Display to Window.

It makes more sense to be consistent and always call it window.

include/Spectre/Window/GLContext.h

@@ -0,0 +1,47 @@
+
+#ifndef SPECTRE_WINDOW_GLCONTEXT_H
+#define SPECTRE_WINDOW_GLCONTEXT_H
+
+#include <Spectre/Math/Vector2.h>
+
+namespace sp {
+
+class PlatformWindow;
+
+// Platform independant interface for OpenGL Contexts.
+
+class GLContext
+{
+public :
+	static GLContext* create();
+
+	virtual ~GLContext();
+
+	// Create a GLContext for this perticular window.
+	virtual bool create(const PlatformWindow* window) = 0;
+
+	virtual void destroy() = 0;
+
+	// Activate this context.
+	virtual bool activate() = 0;
+
+	// Deactivate this context.
+	virtual bool deactivate() = 0;
+
+	// Returns true if this context is the active one. false otherwise.
+	// There can only be one GL context active per thread.
+	virtual bool isActive() const = 0;
+
+	// Set the interval for when the front and back framebuffers should be swapped.
+	// The interval is the number of v-blanks that the gpu must wait before swapping buffers.
+	// 0 means that the gpu never waits, 1 means after exactly 1 v-blank and so on.
+	// This is usually refered to as enabling/disabling vertical synchronization.
+	virtual bool setSwapInterval(int interval) = 0;
+
+	// Swap front with back buffer and vice versa.
+	virtual void swapBuffers() = 0;
+};
+
+} // namespace sp
+
+#endif /* SPECTRE_WINDOW_GLCONTEXT_H */