added sources for Slick

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

lib/slick-source/org/newdawn/slick/svg/RadialGradientFill.java

@@ -0,0 +1,63 @@
+package org.newdawn.slick.svg;
+
+import org.newdawn.slick.geom.Shape;
+import org.newdawn.slick.geom.TexCoordGenerator;
+import org.newdawn.slick.geom.Transform;
+import org.newdawn.slick.geom.Vector2f;
+
+/**
+ * A filler to apply a SVG radial gradient across a shape
+ * 
+ * @author kevin
+ */
+public class RadialGradientFill implements TexCoordGenerator {
+	/** The centre of the gradient */
+	private Vector2f centre;
+	/** The radius before the gradient is complete */
+	private float radius;
+	/** The gradient to apply */
+	private Gradient gradient;
+	/** The shape being filled */
+	private Shape shape;
+	
+	/**
+	 * Create a new fill for a radial gradient
+	 * 
+	 * @param shape The shape being filled
+	 * @param trans The transform given for the shape in the SVG
+	 * @param gradient The gradient to apply across the shape
+	 */
+	public RadialGradientFill(Shape shape, Transform trans, Gradient gradient) {
+		this.gradient = gradient;
+
+		radius = gradient.getR();
+		float x = gradient.getX1();
+		float y = gradient.getY1();
+		
+		float[] c = new float[] {x,y};
+		gradient.getTransform().transform(c, 0, c, 0, 1);
+		trans.transform(c, 0, c, 0, 1);
+		float[] rt = new float[] {x,y-radius};
+		gradient.getTransform().transform(rt, 0, rt, 0, 1);
+		trans.transform(rt, 0, rt, 0, 1);
+		
+		centre = new Vector2f(c[0],c[1]);
+		Vector2f dis = new Vector2f(rt[0],rt[1]);
+		radius = dis.distance(centre);
+	}
+
+	/**
+	 * @see org.newdawn.slick.geom.TexCoordGenerator#getCoordFor(float, float)
+	 */
+	public Vector2f getCoordFor(float x, float y) {
+		float u = centre.distance(new Vector2f(x,y));
+		u /= radius;
+		
+		if (u > 0.99f) {
+			u = 0.99f;
+		}
+		
+		return new Vector2f(u,0);
+	}
+	
+}