almost works

src/mightypork/gamecore/core/App.java

@@ -10,6 +10,7 @@ import mightypork.gamecore.core.events.ShutdownEvent;
 import mightypork.gamecore.core.init.InitTask;
 import mightypork.gamecore.core.plugins.AppPlugin;
 import mightypork.gamecore.graphics.GraphicsModule;
+import mightypork.gamecore.graphics.Renderable;
 import mightypork.gamecore.input.InputModule;
 import mightypork.utils.annotations.Stub;
 import mightypork.utils.eventbus.EventBus;
@@ -41,6 +42,8 @@ public class App extends BusNode {
 	/** The used main loop instance */
 	protected MainLoop mainLoop;
 	
+	private Renderable mainRenderable;
+	
 	
 	/**
 	 * Create an app with given backend.
@@ -78,10 +81,6 @@ public class App extends BusNode {
 	 */
 	public void addPlugin(AppPlugin plugin)
 	{
-		if (started) {
-			throw new IllegalStateException("App already started, cannot add plugins.");
-		}
-
 		// attach to event bus
 		plugins.add(plugin);
 		plugin.bind(this);
@@ -112,6 +111,18 @@ public class App extends BusNode {
 	public void setMainLoop(MainLoop loop)
 	{
 		this.mainLoop = loop;
+		bus().subscribe(loop); // ?
+	}
+	
+	
+	/**
+	 * Set the main renderable
+	 *
+	 * @param renderable the main renderable
+	 */
+	public void setMainRenderable(Renderable renderable)
+	{
+		this.mainRenderable = renderable;
 	}
 	
 	
@@ -146,6 +157,7 @@ public class App extends BusNode {
 		}
 		
 		Log.i("Starting main loop...");
+		mainLoop.setRootRenderable(mainRenderable);
 		mainLoop.start();
 	}
 	

src/mightypork/gamecore/core/events/ShutdownEvent.java

@@ -1,6 +1,7 @@
 package mightypork.gamecore.core.events;
 
 
+import mightypork.gamecore.core.App;
 import mightypork.utils.eventbus.BusEvent;
 import mightypork.utils.eventbus.EventBus;
 import mightypork.utils.logging.Log;
@@ -42,7 +43,9 @@ public class ShutdownEvent extends BusEvent<ShutdownListener> {
 	{
 		if (!isConsumed()) {
 			Log.i("Shutting down...");
-			shutdownTask.run();
+			
+			App.bus().send(new MainLoopRequest(shutdownTask, true));
+			
 		} else {
 			Log.i("Shutdown aborted.");
 		}

src/mightypork/gamecore/core/init/InitTask.java

@@ -118,6 +118,7 @@ public abstract class InitTask {
 		// resolve task order
 		int addedThisIteration = 0;
 		do {
+			addedThisIteration = 0;
 			for (final Iterator<InitTask> i = remaining.iterator(); i.hasNext();) {
 				final InitTask task = i.next();
 				

src/mightypork/gamecore/core/init/InitTaskDisplay.java

@@ -84,6 +84,8 @@ public class InitTaskDisplay extends InitTask {
 		gfx.setTargetFps(fps);
 
 		if (fullscreen) gfx.setFullscreen(true);
+
+		gfx.createDisplay();
 	}
 
 

src/mightypork/gamecore/core/init/InitTaskMainLoop.java

@@ -35,6 +35,6 @@ public abstract class InitTaskMainLoop extends InitTask {
 	@Override
 	public String getName()
 	{
-		return "resource_loader";
+		return "main_loop";
 	}
 }

src/mightypork/gamecore/core/init/InitTaskResources.java

@@ -29,6 +29,6 @@ public abstract class InitTaskResources extends InitTask implements ResourceInit
 	@Override
 	public String[] getDependencies()
 	{
-		return new String[] { "resource_loader" };
+		return new String[] { "resource_loader", "main_loop" };
 	}
 }

src/mightypork/gamecore/core/plugins/screenshot/InitTaskPluginScreenshot.java

@@ -2,6 +2,7 @@ package mightypork.gamecore.core.plugins.screenshot;
 
 
 import mightypork.gamecore.core.init.InitTask;
+import mightypork.gamecore.core.plugins.AppPlugin;
 import mightypork.utils.files.WorkDir;
 
 
@@ -50,7 +51,13 @@ public class InitTaskPluginScreenshot extends InitTask {
 	public void run()
 	{
 		WorkDir.addPath("_screenshot_dir", screenshotDir);
-		app.addPlugin(new ScreenshotPlugin());
+		app.addPlugin(getPluginImpl());
+	}
+
+
+	protected AppPlugin getPluginImpl()
+	{
+		return new ScreenshotPlugin();
 	}
 	
 	

src/mightypork/gamecore/core/plugins/screenshot/ScreenshotPlugin.java

@@ -14,12 +14,13 @@ import mightypork.utils.Support;
  *
  * @author Ondřej Hruška (MightyPork)
  */
-public class ScreenshotPlugin extends AppPlugin {
+public class ScreenshotPlugin extends AppPlugin implements ScreenshotRequestListener {
 	
 	/**
 	 * Take screenshot. Called by the trigger event.
 	 */
-	void takeScreenshot()
+	@Override
+	public void onScreenshotRequest()
 	{
 		App.bus().send(new MainLoopRequest(new Runnable() {
 			

src/mightypork/gamecore/core/plugins/screenshot/ScreenshotRequest.java

@@ -11,12 +11,12 @@ import mightypork.utils.eventbus.events.flags.SingleReceiverEvent;
  * @author MightyPork
  */
 @SingleReceiverEvent
-public class ScreenshotRequest extends BusEvent<ScreenshotPlugin> {
+public class ScreenshotRequest extends BusEvent<ScreenshotRequestListener> {
 
 	@Override
-	protected void handleBy(ScreenshotPlugin handler)
+	protected void handleBy(ScreenshotRequestListener handler)
 	{
-		handler.takeScreenshot();
+		handler.onScreenshotRequest();
 	}
 
 }

src/mightypork/gamecore/graphics/GraphicsModule.java

@@ -267,7 +267,7 @@ public abstract class GraphicsModule extends BackendModule {
 	
 	
 	/**
-	 * Get backend-flavoured deferred texture. This should support PNG images.
+	 * Get backend-flavoured deferred PNG texture.
 	 *
 	 * @param path path to texture
 	 * @return the deferred font
@@ -276,7 +276,7 @@ public abstract class GraphicsModule extends BackendModule {
 	
 	
 	/**
-	 * Get backend-flavoured deferred font. This should support TTF fonts.
+	 * Get backend-flavoured deferred TTF font.
 	 *
 	 * @param path path to font, or font name in the system
 	 * @return the deferred font
@@ -284,6 +284,25 @@ public abstract class GraphicsModule extends BackendModule {
 	public abstract DeferredFont createFontResource(String path);
 	
 	
+	/**
+	 * Get backend-flavoured deferred TTF font.
+	 *
+	 * @param path path to font, or font name in the system
+	 * @param chars chars that should be supported
+	 * @param size font size used when rendering the font to a backing texture.
+	 *            For bitmap fonts, the actual font height.
+	 * @return the deferred font
+	 */
+	public DeferredFont createFont(String path, String chars, double size)
+	{
+		final DeferredFont font = createFontResource(path);
+		font.setChars(chars);
+		font.setSize(size);
+		
+		return font;
+	}
+	
+	
 	/**
 	 * Set target fps (for syncing in endFrame() call).<br>
 	 * With vsync enabled, the target fps may not be met.
@@ -416,4 +435,10 @@ public abstract class GraphicsModule extends BackendModule {
 	 * @return screen height
 	 */
 	public abstract int getHeight();
+
+
+	/**
+	 * Create the display (window) based on current settings.
+	 */
+	public abstract void createDisplay();
 }

src/mightypork/gamecore/input/KeyStroke.java

@@ -60,7 +60,7 @@ public class KeyStroke {
 	 */
 	public boolean isDown()
 	{
-		return key.isDown() && (Keys.getActiveMod() == mod);
+		return key.isDown() && (Keys.getActiveMods() == mod);
 	}
 	
 	

src/mightypork/gamecore/input/Keys.java

@@ -346,7 +346,7 @@ public class Keys {
 	 *
 	 * @return active mod mask (mod bits ored)
 	 */
-	public static int getActiveMod()
+	public static int getActiveMods()
 	{
 		int mods = 0;