Basic css linear-gradient support.

--HG--
branch : dev

include/eepp/graphics/statelistdrawable.hpp

@@ -44,9 +44,9 @@ class EE_API StateListDrawable : public StatefulDrawable {
 
 		virtual Uint8 getStateAlpha( const Uint32& state );
 
-		bool hasDrawableState( Uint32 state );
+		bool hasDrawableState(const Uint32 & state ) const;
 
-		bool hasDrawableStateColor( Uint32 state );
+		bool hasDrawableStateColor(const Uint32 & state ) const;
 
 		void clearDrawables();
 	protected:

include/eepp/scene/nodeattribute.hpp

@@ -37,8 +37,7 @@ class NodeAttribute {
 			TypeRectf
 		};
 
-		class Info
-		{
+		class Info {
 			public:
 				Info( AttributeType type, const std::string& name );
 
@@ -55,6 +54,23 @@ class NodeAttribute {
 				std::vector<std::string> names;
 		};
 
+		class FunctionType {
+			public:
+				static FunctionType parse( const std::string& function );
+
+				FunctionType( const std::string& name, const std::vector<std::string>& parameters );
+
+				const std::string& getName() const;
+
+				const std::vector<std::string> getParameters() const;
+
+				bool isEmpty() const;
+			protected:
+				std::string name;
+
+				std::vector<std::string> parameters;
+		};
+
 		NodeAttribute();
 
 		NodeAttribute( std::string name, std::string value );

include/eepp/system/color.hpp

@@ -235,6 +235,8 @@ class EE_API Color : public tColor<Uint8>
 
 		static Color fromString( std::string str );
 
+		static bool isColorString( std::string str );
+
 		static const Color Transparent;
 		static const Color White;
 		static const Color Black;
@@ -276,8 +278,29 @@ public:
 	Color toColor();
 };
 
-class RectColors {
+class EE_API RectColors {
 	public:
+		RectColors() :
+			TopLeft( Color::White ),
+			TopRight( Color::White ),
+			BottomLeft( Color::White ),
+			BottomRight( Color::White )
+		{}
+
+		RectColors( const Color& color ) :
+			TopLeft( color ),
+			TopRight( color ),
+			BottomLeft( color ),
+			BottomRight( color )
+		{}
+
+		RectColors( const Color& topLeft, const Color& topRight, const Color& bottomLeft, const Color& bottomRight ) :
+			TopLeft( topLeft ),
+			TopRight( topRight ),
+			BottomLeft( bottomLeft ),
+			BottomRight( bottomRight )
+		{}
+
 		Color TopLeft;
 		Color TopRight;
 		Color BottomLeft;