feat(AddCapture): AddScreenshot function

- update Game to be a KeyListener
- add Render save buffer function
- update InputHandler

fix #10

src/main/java/fr/snapgames/fromclasstogame/Game.java

@@ -3,6 +3,7 @@
 import java.awt.Color;
 import java.awt.Font;
 import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -23,7 +24,7 @@
  * @author Frédéric Delorme<[email protected]>
  * @since 0.0.1
  */
-public class Game {
+public class Game implements KeyListener {
 
   private static final Logger logger = LoggerFactory.getLogger(Game.class);
 
@@ -53,8 +54,6 @@ public class Game {
    * the mandatory default constructor
    */
   public Game() {
-    renderer = new Render(320, 200);
-    window = new Window("", 320, 200);
   }
 
   /**
@@ -81,6 +80,7 @@ public void initialize(String[] argv) throws UnknownArgumentException {
     renderer = new Render(this.width, this.height);
     window = new Window(this.title, (int) (this.width * this.scale), (int) (this.height * this.scale));
     inputHandler = new InputHandler(window);
+    inputHandler.addKeyListener(this);
   }
 
   public void loadDefaultValues() {
@@ -204,7 +204,7 @@ private void loop() {
    */
   private void input() {
     if (inputHandler.getKey(KeyEvent.VK_ESCAPE)) {
-      this.exit = true;
+
     }
   }
 
@@ -280,4 +280,30 @@ public static void main(String[] argc) {
       logger.error("Unable to run the game", e);
     }
   }
+
+  @Override
+  public void keyTyped(KeyEvent e) {
+    // nothing to do now
+  }
+
+  @Override
+  public void keyPressed(KeyEvent e) {
+    // nothing to do now
+
+  }
+
+  @Override
+  public void keyReleased(KeyEvent e) {
+    switch (e.getKeyCode()) {
+      case KeyEvent.VK_F11:
+        renderer.saveScreenshot();
+        break;
+      case KeyEvent.VK_ESCAPE:
+        this.exit = true;
+        break;
+      default:
+        break;
+    }
+
+  }
 }

src/main/java/fr/snapgames/fromclasstogame/InputHandler.java

@@ -33,4 +33,8 @@ public boolean getKey(int code) {
         return keys[code];
     }
 
+    public void addKeyListener(KeyListener kl) {
+        window.getFrame().addKeyListener(kl);
+    }
+
 }

src/main/java/fr/snapgames/fromclasstogame/Render.java

@@ -3,12 +3,20 @@
 import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.imageio.ImageIO;
+
 public class Render {
 
     private BufferedImage buffer;
+    static int screenShotIndex = 0;
 
     private List<GameObject> objects = new ArrayList<>();
 
@@ -64,4 +72,27 @@ public void clear() {
     public BufferedImage getBuffer() {
         return this.buffer;
     }
+
+    /**
+     * Save a screenshot of the current buffer.
+     */
+    public void saveScreenshot() {
+        final String path = this.getClass().getResource("/").getPath().substring(1);
+        Path targetDir = Paths.get(path + "/screenshots");
+        int i = screenShotIndex++;
+        String filename = String.format("%sscreenshots/%s-%d.png",path,java.lang.System.nanoTime(),i);
+
+        try {
+            if (!Files.exists(targetDir)) {
+                Files.createDirectory(targetDir);
+            }
+            File out = new File(filename);
+            ImageIO.write(getBuffer(), "PNG", out);
+
+            System.out.println(String.format("Write screenshot to %s", filename));
+        } catch (IOException e) {
+            System.err.println(String.format("Unable to write screenshot to %s:%s", filename, e.getMessage()));
+        }
+    }
+
 }

src/main/java/fr/snapgames/fromclasstogame/Window.java

@@ -10,7 +10,13 @@
 import java.awt.Point;
 import java.awt.event.WindowEvent;
 import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 
+import javax.imageio.ImageIO;
 import javax.swing.JFrame;
 
 public class Window {
@@ -41,14 +47,11 @@ public void draw(long realFPS, BufferedImage img) {
         if (debugFont == null) {
             debugFont = g.getFont().deriveFont(Font.CENTER_BASELINE, 8);
         }
-        g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
-        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
         g.drawImage(img, 0, 30, frame.getWidth(), frame.getHeight(), 0, 0, img.getWidth(), img.getHeight(), null);
 
         g.setFont(debugFont);
         g.setColor(Color.ORANGE);
         g.drawString(String.format("FPS:%03d", realFPS), 10, frame.getHeight() - 30);
-
         g.dispose();
     }
 
@@ -59,4 +62,5 @@ public JFrame getFrame() {
     public void close() {
         frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
     }
+
 }

src/test/java/features/GameDefSteps.java

@@ -26,6 +26,11 @@ public class GameDefSteps {
     @Given("the Game is instantiated")
     public void givenTheGameIsInstantiated() {
         game = new Game();
+        try {
+            game.initialize(null);
+        } catch (UnknownArgumentException e) {
+            fail("Unable to initialize the game");
+        }
         game.testMode = true;
     }