added sources for Slick

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

lib/slick-source/org/newdawn/slick/imageout/ImageWriter.java

@@ -0,0 +1,25 @@
+package org.newdawn.slick.imageout;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.newdawn.slick.Image;
+
+/**
+ * The description of any class that can produce data to an output stream reprsenting
+ * some image in memory.
+ *
+ * @author Jon 
+ */
+public interface ImageWriter {
+	/**
+	 * Save an Image to an given location
+	 * 
+	 * @param image The image to be written
+	 * @param format The format that this writer is expected to be produced in
+	 * @param out The output stream to which the image data should be written
+	 * @param writeAlpha True if we should write alpha information to the file
+	 * @throws IOException Indicates a failure to write out the image to the specified location
+	 */
+	void saveImage(Image image, String format, OutputStream out, boolean writeAlpha) throws IOException; 
+}