Adding new files to register objects that require to be notified when resolution changes.

Also added a structure that holds the resolution and the current scaling ratio.

src/sizeratio.cpp

@@ -0,0 +1,46 @@
+#include "sizeratio.hpp"
+
+namespace cloonel {
+	namespace {
+		float2 CalculateRatio ( float2 parOriginal, float2 parResolution ) __attribute__((pure));
+
+		///----------------------------------------------------------------------
+		///----------------------------------------------------------------------
+		float2 CalculateRatio (float2 parOriginal, float2 parResolution) {
+			return parOriginal / parResolution;
+		}
+	} //unnamed namespace
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	SizeRatio::SizeRatio (const float2& parOriginal) :
+		m_original(parOriginal),
+		m_size(parOriginal),
+		m_ratio(1.0f)
+	{
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	SizeRatio::SizeRatio (const float2& parOriginal, const float2& parSize) :
+		m_original(parOriginal),
+		m_size(parSize),
+		m_ratio(CalculateRatio(parOriginal, parSize))
+	{
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void SizeRatio::SetOriginal (const float2& parOriginal, const float2& parRes) {
+		m_original = parOriginal;
+		m_size = parRes;
+		m_ratio = CalculateRatio(parOriginal, parRes);
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void SizeRatio::UpdateResolution (const float2& parNewRes) {
+		m_size = parNewRes;
+		m_ratio = CalculateRatio(m_original, parNewRes);
+	}
+} //namespace cloonel