optimized tile scaling

src/de/miaurizius/jgame2d/tile/TileManager.java

@@ -5,6 +5,7 @@ import de.miaurizius.jgame2d.core.GamePanel;
 
 import javax.imageio.ImageIO;
 import java.awt.*;
+import java.awt.image.BufferedImage;
 import java.io.*;
 import java.util.logging.Level;
 
@@ -22,33 +23,34 @@ public class TileManager {
         loadMap("testworld");
     }
 
-    public void getTileImage() {
+    public void initializeTile(int i, String name, boolean col) {
         try {
-            tile[0] = new Tile();
-            tile[0].image = ImageIO.read(new FileInputStream("assets/tiles/grass.png"));
-
-            tile[1] = new Tile();
-            tile[1].image = ImageIO.read(new FileInputStream("assets/tiles/wall.png"));
-            tile[1].collision = true;
-
-            tile[2] = new Tile();
-            tile[2].image = ImageIO.read(new FileInputStream("assets/tiles/water.png"));
-            tile[2].collision = true;
-
-            tile[3] = new Tile();
-            tile[3].image = ImageIO.read(new FileInputStream("assets/tiles/earth.png"));
-
-            tile[4] = new Tile();
-            tile[4].image = ImageIO.read(new FileInputStream("assets/tiles/tree.png"));
-            tile[4].collision = true;
-
-            tile[5] = new Tile();
-            tile[5].image = ImageIO.read(new FileInputStream("assets/tiles/sand.png"));
-        } catch (IOException e) {
+            tile[i] = new Tile();
+            tile[i].image = ImageIO.read(new FileInputStream("assets/tiles/" + name + ".png"));
+            tile[i].collision = col;
+        } catch(IOException e) {
             Boot.logger.log(Level.SEVERE, "Could not load tile", e);
         }
     }
 
+    public void getTileImage() {
+        initializeTile(0, "grass", false);
+        initializeTile(1, "wall", true);
+        initializeTile(2, "water", true);
+        initializeTile(3, "earth", false);
+        initializeTile(4, "tree", true);
+        initializeTile(5, "sand", false);
+
+        BufferedImage scaledImage;
+        for (Tile tile : tile) {
+            if(tile == null) continue;
+            scaledImage = new BufferedImage(panel.tileSize, panel.tileSize, tile.image.getType());
+            Graphics2D g2d = scaledImage.createGraphics();
+            g2d.drawImage(tile.image, 0, 0, panel.tileSize, panel.tileSize, null);
+            tile.image = scaledImage;
+        }
+    }
+
     public void loadMap(String map) {
         try {
             InputStream stream = new FileInputStream("assets/maps/"+map+".map");