Java/Game/Game Animation
Animation Test 1
<source lang="java">
/*
DEVELOPING GAME IN JAVA Caracteristiques Editeur : NEW RIDERS Auteur : BRACKEEN Parution : 09 2003 Pages : 972 Isbn : 1-59273-005-1 Reliure : Paperback Disponibilite : Disponible a la librairie
- /
import java.awt.DisplayMode; import java.awt.Graphics; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Image; import java.awt.Window; import java.util.ArrayList; import javax.swing.ImageIcon; import javax.swing.JFrame; public class AnimationTest1 {
public static void main(String args[]) {
DisplayMode displayMode;
if (args.length == 3) {
displayMode = new DisplayMode(Integer.parseInt(args[0]), Integer
.parseInt(args[1]), Integer.parseInt(args[2]),
DisplayMode.REFRESH_RATE_UNKNOWN);
} else {
displayMode = new DisplayMode(800, 600, 16,
DisplayMode.REFRESH_RATE_UNKNOWN);
}
AnimationTest1 test = new AnimationTest1();
test.run(displayMode);
}
private static final long DEMO_TIME = 5000;
private SimpleScreenManager screen;
private Image bgImage;
private Animation anim;
public void loadImages() {
// load images
bgImage = loadImage("images/background.jpg");
Image player1 = loadImage("images/player1.png");
Image player2 = loadImage("images/player2.png");
Image player3 = loadImage("images/player3.png");
// create animation
anim = new Animation();
anim.addFrame(player1, 250);
anim.addFrame(player2, 150);
anim.addFrame(player1, 150);
anim.addFrame(player2, 150);
anim.addFrame(player3, 200);
anim.addFrame(player2, 150);
}
private Image loadImage(String fileName) {
return new ImageIcon(fileName).getImage();
}
public void run(DisplayMode displayMode) {
screen = new SimpleScreenManager();
try {
screen.setFullScreen(displayMode, new JFrame());
loadImages();
animationLoop();
} finally {
screen.restoreScreen();
}
}
public void animationLoop() {
long startTime = System.currentTimeMillis();
long currTime = startTime;
while (currTime - startTime < DEMO_TIME) {
long elapsedTime = System.currentTimeMillis() - currTime;
currTime += elapsedTime;
// update animation
anim.update(elapsedTime);
// draw to screen
Graphics g = screen.getFullScreenWindow().getGraphics();
draw(g);
g.dispose();
// take a nap
try {
Thread.sleep(20);
} catch (InterruptedException ex) {
}
}
}
public void draw(Graphics g) {
// draw background
g.drawImage(bgImage, 0, 0, null);
// draw image
g.drawImage(anim.getImage(), 0, 0, null);
}
} /**
* The Animation class manages a series of images (frames) and the amount of * time to display each frame. */
class Animation {
private ArrayList frames;
private int currFrameIndex;
private long animTime;
private long totalDuration;
/**
* Creates a new, empty Animation.
*/
public Animation() {
frames = new ArrayList();
totalDuration = 0;
start();
}
/**
* Adds an image to the animation with the specified duration (time to
* display the image).
*/
public synchronized void addFrame(Image image, long duration) {
totalDuration += duration;
frames.add(new AnimFrame(image, totalDuration));
}
/**
* Starts this animation over from the beginning.
*/
public synchronized void start() {
animTime = 0;
currFrameIndex = 0;
}
/**
* Updates this animation"s current image (frame), if neccesary.
*/
public synchronized void update(long elapsedTime) {
if (frames.size() > 1) {
animTime += elapsedTime;
if (animTime >= totalDuration) {
animTime = animTime % totalDuration;
currFrameIndex = 0;
}
while (animTime > getFrame(currFrameIndex).endTime) {
currFrameIndex++;
}
}
}
/**
* Gets this Animation"s current image. Returns null if this animation has
* no images.
*/
public synchronized Image getImage() {
if (frames.size() == 0) {
return null;
} else {
return getFrame(currFrameIndex).image;
}
}
private AnimFrame getFrame(int i) {
return (AnimFrame) frames.get(i);
}
private class AnimFrame {
Image image;
long endTime;
public AnimFrame(Image image, long endTime) {
this.image = image;
this.endTime = endTime;
}
}
} /**
* The SimpleScreenManager class manages initializing and displaying full screen * graphics modes. */
class SimpleScreenManager {
private GraphicsDevice device;
/**
* Creates a new SimpleScreenManager object.
*/
public SimpleScreenManager() {
GraphicsEnvironment environment = GraphicsEnvironment
.getLocalGraphicsEnvironment();
device = environment.getDefaultScreenDevice();
}
/**
* Enters full screen mode and changes the display mode.
*/
public void setFullScreen(DisplayMode displayMode, JFrame window) {
window.setUndecorated(true);
window.setResizable(false);
device.setFullScreenWindow(window);
if (displayMode != null && device.isDisplayChangeSupported()) {
try {
device.setDisplayMode(displayMode);
} catch (IllegalArgumentException ex) {
// ignore - illegal mode for this device
}
}
}
/**
* Returns the window currently used in full screen mode.
*/
public Window getFullScreenWindow() {
return device.getFullScreenWindow();
}
/**
* Restores the screen"s display mode.
*/
public void restoreScreen() {
Window window = device.getFullScreenWindow();
if (window != null) {
window.dispose();
}
device.setFullScreenWindow(null);
}
}
</source>
Animation Test 2
<source lang="java">
/*
DEVELOPING GAME IN JAVA Caracteristiques Editeur : NEW RIDERS Auteur : BRACKEEN Parution : 09 2003 Pages : 972 Isbn : 1-59273-005-1 Reliure : Paperback Disponibilite : Disponible a la librairie
- /
import java.awt.DisplayMode; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Image; import java.awt.Toolkit; import java.awt.Window; import java.awt.image.BufferStrategy; import java.awt.image.BufferedImage; import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import javax.swing.ImageIcon; import javax.swing.JFrame; public class AnimationTest2 {
public static void main(String args[]) {
AnimationTest2 test = new AnimationTest2();
test.run();
}
private static final DisplayMode POSSIBLE_MODES[] = {
new DisplayMode(800, 600, 32, 0), new DisplayMode(800, 600, 24, 0),
new DisplayMode(800, 600, 16, 0), new DisplayMode(640, 480, 32, 0),
new DisplayMode(640, 480, 24, 0), new DisplayMode(640, 480, 16, 0) };
private static final long DEMO_TIME = 10000;
private ScreenManager screen;
private Image bgImage;
private Animation anim;
public void loadImages() {
// load images
bgImage = loadImage("images/background.jpg");
Image player1 = loadImage("images/player1.png");
Image player2 = loadImage("images/player2.png");
Image player3 = loadImage("images/player3.png");
// create animation
anim = new Animation();
anim.addFrame(player1, 250);
anim.addFrame(player2, 150);
anim.addFrame(player1, 150);
anim.addFrame(player2, 150);
anim.addFrame(player3, 200);
anim.addFrame(player2, 150);
}
private Image loadImage(String fileName) {
return new ImageIcon(fileName).getImage();
}
public void run() {
screen = new ScreenManager();
try {
DisplayMode displayMode = screen
.findFirstCompatibleMode(POSSIBLE_MODES);
screen.setFullScreen(displayMode);
loadImages();
animationLoop();
} finally {
screen.restoreScreen();
}
}
public void animationLoop() {
long startTime = System.currentTimeMillis();
long currTime = startTime;
while (currTime - startTime < DEMO_TIME) {
long elapsedTime = System.currentTimeMillis() - currTime;
currTime += elapsedTime;
// update animation
anim.update(elapsedTime);
// draw and update screen
Graphics2D g = screen.getGraphics();
draw(g);
g.dispose();
screen.update();
// take a nap
try {
Thread.sleep(20);
} catch (InterruptedException ex) {
}
}
}
public void draw(Graphics g) {
// draw background
g.drawImage(bgImage, 0, 0, null);
// draw image
g.drawImage(anim.getImage(), 0, 0, null);
}
} /**
* The ScreenManager class manages initializing and displaying full screen * graphics modes. */
class ScreenManager {
private GraphicsDevice device;
/**
* Creates a new ScreenManager object.
*/
public ScreenManager() {
GraphicsEnvironment environment = GraphicsEnvironment
.getLocalGraphicsEnvironment();
device = environment.getDefaultScreenDevice();
}
/**
* Returns a list of compatible display modes for the default device on the
* system.
*/
public DisplayMode[] getCompatibleDisplayModes() {
return device.getDisplayModes();
}
/**
* Returns the first compatible mode in a list of modes. Returns null if no
* modes are compatible.
*/
public DisplayMode findFirstCompatibleMode(DisplayMode modes[]) {
DisplayMode goodModes[] = device.getDisplayModes();
for (int i = 0; i < modes.length; i++) {
for (int j = 0; j < goodModes.length; j++) {
if (displayModesMatch(modes[i], goodModes[j])) {
return modes[i];
}
}
}
return null;
}
/**
* Returns the current display mode.
*/
public DisplayMode getCurrentDisplayMode() {
return device.getDisplayMode();
}
/**
* Determines if two display modes "match". Two display modes match if they
* have the same resolution, bit depth, and refresh rate. The bit depth is
* ignored if one of the modes has a bit depth of
* DisplayMode.BIT_DEPTH_MULTI. Likewise, the refresh rate is ignored if one
* of the modes has a refresh rate of DisplayMode.REFRESH_RATE_UNKNOWN.
*/
public boolean displayModesMatch(DisplayMode mode1, DisplayMode mode2)
{
if (mode1.getWidth() != mode2.getWidth()
|| mode1.getHeight() != mode2.getHeight()) {
return false;
}
if (mode1.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI
&& mode2.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI
&& mode1.getBitDepth() != mode2.getBitDepth()) {
return false;
}
if (mode1.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN
&& mode2.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN
&& mode1.getRefreshRate() != mode2.getRefreshRate()) {
return false;
}
return true;
}
/**
* Enters full screen mode and changes the display mode. If the specified
* display mode is null or not compatible with this device, or if the
* display mode cannot be changed on this system, the current display mode
* is used.
* * The display uses a BufferStrategy with 2 buffers. */ public void setFullScreen(DisplayMode displayMode) { final JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setUndecorated(true); frame.setIgnoreRepaint(true); frame.setResizable(false); device.setFullScreenWindow(frame); if (displayMode != null && device.isDisplayChangeSupported()) { try { device.setDisplayMode(displayMode); } catch (IllegalArgumentException ex) { } // fix for mac os x frame.setSize(displayMode.getWidth(), displayMode.getHeight()); } // avoid potential deadlock in 1.4.1_02 try { EventQueue.invokeAndWait(new Runnable() { public void run() { frame.createBufferStrategy(2); } }); } catch (InterruptedException ex) { // ignore } catch (InvocationTargetException ex) { // ignore } } /** * Gets the graphics context for the display. The ScreenManager uses double * buffering, so applications must call update() to show any graphics drawn. * <p> * The application must dispose of the graphics object. */ public Graphics2D getGraphics() { Window window = device.getFullScreenWindow(); if (window != null) { BufferStrategy strategy = window.getBufferStrategy(); return (Graphics2D) strategy.getDrawGraphics(); } else { return null; } } /** * Updates the display. */ public void update() { Window window = device.getFullScreenWindow(); if (window != null) { BufferStrategy strategy = window.getBufferStrategy(); if (!strategy.contentsLost()) { strategy.show(); } } // Sync the display on some systems. // (on Linux, this fixes event queue problems) Toolkit.getDefaultToolkit().sync(); } /** * Returns the window currently used in full screen mode. Returns null if * the device is not in full screen mode. */ public JFrame getFullScreenWindow() { return (JFrame) device.getFullScreenWindow(); } /** * Returns the width of the window currently used in full screen mode. * Returns 0 if the device is not in full screen mode. */ public int getWidth() { Window window = device.getFullScreenWindow(); if (window != null) { return window.getWidth(); } else { return 0; } } /** * Returns the height of the window currently used in full screen mode. * Returns 0 if the device is not in full screen mode. */ public int getHeight() { Window window = device.getFullScreenWindow(); if (window != null) { return window.getHeight(); } else { return 0; } } /** * Restores the screen"s display mode. */ public void restoreScreen() { Window window = device.getFullScreenWindow(); if (window != null) { window.dispose(); } device.setFullScreenWindow(null); } /** * Creates an image compatible with the current display. */ public BufferedImage createCompatibleImage(int w, int h, int transparancy) { Window window = device.getFullScreenWindow(); if (window != null) { GraphicsConfiguration gc = window.getGraphicsConfiguration(); return gc.createCompatibleImage(w, h, transparancy); } return null; } } /** * The Animation class manages a series of images (frames) and the amount of * time to display each frame. */ class Animation { private ArrayList frames; private int currFrameIndex; private long animTime; private long totalDuration; /** * Creates a new, empty Animation. */ public Animation() { frames = new ArrayList(); totalDuration = 0; start(); } /** * Adds an image to the animation with the specified duration (time to * display the image). */ public synchronized void addFrame(Image image, long duration) { totalDuration += duration; frames.add(new AnimFrame(image, totalDuration)); } /** * Starts this animation over from the beginning. */ public synchronized void start() { animTime = 0; currFrameIndex = 0; } /** * Updates this animation"s current image (frame), if neccesary. */ public synchronized void update(long elapsedTime) { if (frames.size() > 1) { animTime += elapsedTime; if (animTime >= totalDuration) { animTime = animTime % totalDuration; currFrameIndex = 0; } while (animTime > getFrame(currFrameIndex).endTime) { currFrameIndex++; } } } /** * Gets this Animation"s current image. Returns null if this animation has * no images. */ public synchronized Image getImage() { if (frames.size() == 0) { return null; } else { return getFrame(currFrameIndex).image; } } private AnimFrame getFrame(int i) { return (AnimFrame) frames.get(i); } private class AnimFrame { Image image; long endTime; public AnimFrame(Image image, long endTime) { this.image = image; this.endTime = endTime; } } } </source>
Mouse look Test
<source lang="java">
/*
DEVELOPING GAME IN JAVA Caracteristiques Editeur : NEW RIDERS Auteur : BRACKEEN Parution : 09 2003 Pages : 972 Isbn : 1-59273-005-1 Reliure : Paperback Disponibilite : Disponible a la librairie
- /
import java.awt.AWTException; import java.awt.Color; import java.awt.DisplayMode; import java.awt.EventQueue; import java.awt.Font; import java.awt.Graphics2D; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Image; import java.awt.Point; import java.awt.RenderingHints; import java.awt.Robot; import java.awt.Toolkit; import java.awt.Window; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.image.BufferStrategy; import java.awt.image.BufferedImage; import java.lang.reflect.InvocationTargetException; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.SwingUtilities; /**
* A simple mouselook test. Using mouselook, the user can virtually move the * mouse in any direction indefinitly. Without mouselook, the mouse stops when * it hits the edge of the screen. * <p> * Mouselook works by recentering the mouse whenever it is moved, so it can * always measure the relative mouse movement, and the mouse never hits the edge * of the screen. */
public class MouselookTest extends GameCore implements MouseMotionListener,
KeyListener {
public static void main(String[] args) {
new MouselookTest().run();
}
private Image bgImage;
private Robot robot;
private Point mouseLocation;
private Point centerLocation;
private Point imageLocation;
private boolean relativeMouseMode;
private boolean isRecentering;
public void init() {
super.init();
mouseLocation = new Point();
centerLocation = new Point();
imageLocation = new Point();
relativeMouseMode = true;
isRecentering = false;
try {
robot = new Robot();
recenterMouse();
mouseLocation.x = centerLocation.x;
mouseLocation.y = centerLocation.y;
} catch (AWTException ex) {
System.out.println("Couldn"t create Robot!");
}
Window window = screen.getFullScreenWindow();
window.addMouseMotionListener(this);
window.addKeyListener(this);
bgImage = loadImage("../images/background.jpg");
}
public synchronized void draw(Graphics2D g) {
int w = screen.getWidth();
int h = screen.getHeight();
// make sure position is correct
imageLocation.x %= w;
imageLocation.y %= screen.getHeight();
if (imageLocation.x < 0) {
imageLocation.x += w;
}
if (imageLocation.y < 0) {
imageLocation.y += screen.getHeight();
}
// draw the image in four places to cover the screen
int x = imageLocation.x;
int y = imageLocation.y;
g.drawImage(bgImage, x, y, null);
g.drawImage(bgImage, x - w, y, null);
g.drawImage(bgImage, x, y - h, null);
g.drawImage(bgImage, x - w, y - h, null);
// draw instructions
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
g.drawString("Press Space to change mouse modes.", 5, FONT_SIZE);
g.drawString("Press Escape to exit.", 5, FONT_SIZE * 2);
}
/**
* Uses the Robot class to try to postion the mouse in the center of the
* screen.
* <p>
* Note that use of the Robot class may not be available on all platforms.
*/
private synchronized void recenterMouse() {
Window window = screen.getFullScreenWindow();
if (robot != null && window.isShowing()) {
centerLocation.x = window.getWidth() / 2;
centerLocation.y = window.getHeight() / 2;
SwingUtilities.convertPointToScreen(centerLocation, window);
isRecentering = true;
robot.mouseMove(centerLocation.x, centerLocation.y);
}
}
// from the MouseMotionListener interface
public void mouseDragged(MouseEvent e) {
mouseMoved(e);
}
// from the MouseMotionListener interface
public synchronized void mouseMoved(MouseEvent e) {
// this event is from re-centering the mouse - ignore it
if (isRecentering && centerLocation.x == e.getX()
&& centerLocation.y == e.getY()) {
isRecentering = false;
} else {
int dx = e.getX() - mouseLocation.x;
int dy = e.getY() - mouseLocation.y;
imageLocation.x += dx;
imageLocation.y += dy;
// recenter the mouse
if (relativeMouseMode) {
recenterMouse();
}
}
mouseLocation.x = e.getX();
mouseLocation.y = e.getY();
}
// from the KeyListener interface
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
// exit the program
stop();
} else if (e.getKeyCode() == KeyEvent.VK_SPACE) {
// change relative mouse mode
relativeMouseMode = !relativeMouseMode;
}
}
// from the KeyListener interface
public void keyReleased(KeyEvent e) {
// do nothing
}
// from the KeyListener interface
public void keyTyped(KeyEvent e) {
// do nothing
}
} /**
* Simple abstract class used for testing. Subclasses should implement the * draw() method. */
abstract class GameCore {
protected static final int FONT_SIZE = 24;
private static final DisplayMode POSSIBLE_MODES[] = {
new DisplayMode(800, 600, 32, 0), new DisplayMode(800, 600, 24, 0),
new DisplayMode(800, 600, 16, 0), new DisplayMode(640, 480, 32, 0),
new DisplayMode(640, 480, 24, 0), new DisplayMode(640, 480, 16, 0) };
private boolean isRunning;
protected ScreenManager screen;
/**
* Signals the game loop that it"s time to quit
*/
public void stop() {
isRunning = false;
}
/**
* Calls init() and gameLoop()
*/
public void run() {
try {
init();
gameLoop();
} finally {
screen.restoreScreen();
}
}
/**
* Sets full screen mode and initiates and objects.
*/
public void init() {
screen = new ScreenManager();
DisplayMode displayMode = screen
.findFirstCompatibleMode(POSSIBLE_MODES);
screen.setFullScreen(displayMode);
Window window = screen.getFullScreenWindow();
window.setFont(new Font("Dialog", Font.PLAIN, FONT_SIZE));
window.setBackground(Color.blue);
window.setForeground(Color.white);
isRunning = true;
}
public Image loadImage(String fileName) {
return new ImageIcon(fileName).getImage();
}
/**
* Runs through the game loop until stop() is called.
*/
public void gameLoop() {
long startTime = System.currentTimeMillis();
long currTime = startTime;
while (isRunning) {
long elapsedTime = System.currentTimeMillis() - currTime;
currTime += elapsedTime;
// update
update(elapsedTime);
// draw the screen
Graphics2D g = screen.getGraphics();
draw(g);
g.dispose();
screen.update();
// take a nap
try {
Thread.sleep(20);
} catch (InterruptedException ex) {
}
}
}
/**
* Updates the state of the game/animation based on the amount of elapsed
* time that has passed.
*/
public void update(long elapsedTime) {
// do nothing
}
/**
* Draws to the screen. Subclasses must override this method.
*/
public abstract void draw(Graphics2D g);
} /**
* The ScreenManager class manages initializing and displaying full screen * graphics modes. */
class ScreenManager {
private GraphicsDevice device;
/**
* Creates a new ScreenManager object.
*/
public ScreenManager() {
GraphicsEnvironment environment = GraphicsEnvironment
.getLocalGraphicsEnvironment();
device = environment.getDefaultScreenDevice();
}
/**
* Returns a list of compatible display modes for the default device on the
* system.
*/
public DisplayMode[] getCompatibleDisplayModes() {
return device.getDisplayModes();
}
/**
* Returns the first compatible mode in a list of modes. Returns null if no
* modes are compatible.
*/
public DisplayMode findFirstCompatibleMode(DisplayMode modes[]) {
DisplayMode goodModes[] = device.getDisplayModes();
for (int i = 0; i < modes.length; i++) {
for (int j = 0; j < goodModes.length; j++) {
if (displayModesMatch(modes[i], goodModes[j])) {
return modes[i];
}
}
}
return null;
}
/**
* Returns the current display mode.
*/
public DisplayMode getCurrentDisplayMode() {
return device.getDisplayMode();
}
/**
* Determines if two display modes "match". Two display modes match if they
* have the same resolution, bit depth, and refresh rate. The bit depth is
* ignored if one of the modes has a bit depth of
* DisplayMode.BIT_DEPTH_MULTI. Likewise, the refresh rate is ignored if one
* of the modes has a refresh rate of DisplayMode.REFRESH_RATE_UNKNOWN.
*/
public boolean displayModesMatch(DisplayMode mode1, DisplayMode mode2)
{
if (mode1.getWidth() != mode2.getWidth()
|| mode1.getHeight() != mode2.getHeight()) {
return false;
}
if (mode1.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI
&& mode2.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI
&& mode1.getBitDepth() != mode2.getBitDepth()) {
return false;
}
if (mode1.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN
&& mode2.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN
&& mode1.getRefreshRate() != mode2.getRefreshRate()) {
return false;
}
return true;
}
/**
* Enters full screen mode and changes the display mode. If the specified
* display mode is null or not compatible with this device, or if the
* display mode cannot be changed on this system, the current display mode
* is used.
* <p>
* The display uses a BufferStrategy with 2 buffers.
*/
public void setFullScreen(DisplayMode displayMode) {
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setUndecorated(true);
frame.setIgnoreRepaint(true);
frame.setResizable(false);
device.setFullScreenWindow(frame);
if (displayMode != null && device.isDisplayChangeSupported()) {
try {
device.setDisplayMode(displayMode);
} catch (IllegalArgumentException ex) {
}
// fix for mac os x
frame.setSize(displayMode.getWidth(), displayMode.getHeight());
}
// avoid potential deadlock in 1.4.1_02
try {
EventQueue.invokeAndWait(new Runnable() {
public void run() {
frame.createBufferStrategy(2);
}
});
} catch (InterruptedException ex) {
// ignore
} catch (InvocationTargetException ex) {
// ignore
}
}
/**
* Gets the graphics context for the display. The ScreenManager uses double
* buffering, so applications must call update() to show any graphics drawn.
* <p>
* The application must dispose of the graphics object.
*/
public Graphics2D getGraphics() {
Window window = device.getFullScreenWindow();
if (window != null) {
BufferStrategy strategy = window.getBufferStrategy();
return (Graphics2D) strategy.getDrawGraphics();
} else {
return null;
}
}
/**
* Updates the display.
*/
public void update() {
Window window = device.getFullScreenWindow();
if (window != null) {
BufferStrategy strategy = window.getBufferStrategy();
if (!strategy.contentsLost()) {
strategy.show();
}
}
// Sync the display on some systems.
// (on Linux, this fixes event queue problems)
Toolkit.getDefaultToolkit().sync();
}
/**
* Returns the window currently used in full screen mode. Returns null if
* the device is not in full screen mode.
*/
public JFrame getFullScreenWindow() {
return (JFrame) device.getFullScreenWindow();
}
/**
* Returns the width of the window currently used in full screen mode.
* Returns 0 if the device is not in full screen mode.
*/
public int getWidth() {
Window window = device.getFullScreenWindow();
if (window != null) {
return window.getWidth();
} else {
return 0;
}
}
/**
* Returns the height of the window currently used in full screen mode.
* Returns 0 if the device is not in full screen mode.
*/
public int getHeight() {
Window window = device.getFullScreenWindow();
if (window != null) {
return window.getHeight();
} else {
return 0;
}
}
/**
* Restores the screen"s display mode.
*/
public void restoreScreen() {
Window window = device.getFullScreenWindow();
if (window != null) {
window.dispose();
}
device.setFullScreenWindow(null);
}
/**
* Creates an image compatible with the current display.
*/
public BufferedImage createCompatibleImage(int w, int h, int transparancy) {
Window window = device.getFullScreenWindow();
if (window != null) {
GraphicsConfiguration gc = window.getGraphicsConfiguration();
return gc.createCompatibleImage(w, h, transparancy);
}
return null;
}
}
</source>
