Move the default image filter to the Image class, instead of Graphics applying it on newImage

src/modules/graphics/opengl/Image.h

@@ -71,6 +71,9 @@ namespace opengl
 		bool loadVolatilePOT();
 		bool loadVolatileNPOT();
 
+		// The default image filter
+		static Image::Filter defaultFilter;
+
 	public:
 
 		/**
@@ -141,6 +144,10 @@ namespace opengl
 
 		static bool hasNpot();
 
+		// The default filter.
+		static void setDefaultFilter(const Image::Filter &f);
+		static const Image::Filter &getDefaultFilter();
+
 	private:
 
 		void drawv(const Matrix & t, const vertex * v) const;