added sources for Slick

Former-commit-id: 1647fa32ef6894bd7db44f741f07c2f4dcdf9054
Former-commit-id: 0e5810dcfbe1fd59b13e7cabe9f1e93c5542da2d

lib/slick-source/org/newdawn/slick/ShapeFill.java

@@ -0,0 +1,33 @@
+package org.newdawn.slick;
+
+import org.newdawn.slick.geom.Shape;
+import org.newdawn.slick.geom.Vector2f;
+
+/**
+ * A filling method for a shape. This allows changing colours at shape verticies and 
+ * modify they're positions as required
+ *
+ * @author kevin
+ */
+public interface ShapeFill {
+
+	/**
+	 * Get the colour that should be applied at the specified location
+	 * 
+	 * @param shape The shape being filled
+	 * @param x The x coordinate of the point being coloured 
+	 * @param y The y coordinate of the point being coloured
+	 * @return The colour that should be applied based on the control points of this gradient
+	 */
+	public Color colorAt(Shape shape, float x, float y);
+
+	/**
+	 * Get the offset for a vertex at a given location based on it's shape
+	 * 
+	 * @param shape The shape being filled
+	 * @param x The x coordinate of the point being drawn 
+	 * @param y The y coordinate of the point being drawn
+	 * @return The offset to apply to this vertex
+	 */
+	public Vector2f getOffsetAt(Shape shape, float x, float y);
+}