Java Image类代码示例

import playn.core.Image; //导入依赖的package包/类
private static Sprite getSprite (final Platform plat, String jsonPath, final Image[] images) {
  final RPromise<Sprite> state = RPromise.create();
  final Sprite sprite = new Sprite(state);
  // load and parse json
  plat.assets().getText(jsonPath).onFailure(state.failer()).onSuccess(new Slot<String>() {
    @Override public void onEmit (String json) {
      try {
        loadSprite(plat, images, sprite, plat.json().parse(json), state);
      } catch (Throwable err) {
        err.printStackTrace(System.err);
        state.fail(err);
      }
    }
  });
  return sprite;
}
 

import playn.core.Image; //导入依赖的package包/类
public HelloGame(Platform plat) {
  super(plat, 25); // 25 millis per frame = ~40fps

  // combine mouse and touch into pointer events
  pointer = new Pointer(plat);

  // create and add background image layer
  Image bgImage = plat.assets().getImage("images/bg.png");
  ImageLayer bgLayer = new ImageLayer(bgImage);
  bgLayer.setSize(plat.graphics().viewSize);
  rootLayer.add(bgLayer);

  // create a group layer to hold the peas
  final GroupLayer peaLayer = new GroupLayer();
  rootLayer.add(peaLayer);

  // when the pointer is tapped/clicked, add a new pea
  pointer.events.connect(new Slot<Pointer.Event>() {
    @Override public void onEmit (Pointer.Event event) {
      if (event.kind.isStart) new Pea(peaLayer, event.x(), event.y());
    }
  });
}
 

import playn.core.Image; //导入依赖的package包/类
private void startLoadingImages() {
    List<RFuture<Image>> futures = SimGame.game.assets.cache(GameAssets.ImageKey.values());
    for (RFuture<Image> future : futures) {
        future.onSuccess(new Slot<Image>() {
            @Override
            public void onEmit(Image image) {
                progressBar.increment();
            }
        });
        future.onFailure(new Slot<Throwable>() {
            @Override
            public void onEmit(Throwable throwable) {
                SimGame.game.plat.log().warn("Failed to load image", throwable);
            }
        });
    }
    RFuture.collect(futures).onSuccess(new Slot<Collection<Image>>() {
        @Override
        public void onEmit(Collection<Image> tiles) {
            countDown();
        }
    });
}
 

import playn.core.Image; //导入依赖的package包/类
@Override
public void visit(Widget widget, TexturedBackground background) {
    IAnimationFrame frame = background.getPlay().getCurrentFrame();
    if (null != frame) {
        Image image = (Image) frame.getImage().getId();
        surface.save();
        surface.translate(widget.getX() + widget.getWidth()/2.0f, widget.getY()+widget.getHeight()/2.0f);
        surface.scale(background.isMirrorX() ? -1.0f : 1.0f, background.isMirrorY() ? -1.0f : 1.0f);
        surface.drawImage(image,
                -widget.getWidth()/2.0f,
                -widget.getHeight()/2.0f,
                widget.getWidth(),
                widget.getHeight(),
                frame.getU1() * image.width(),
                frame.getV1() * image.height(),
                (frame.getU2() - frame.getU1()) * image.width(),
                (frame.getV2() - frame.getV1()) * image.height());
        surface.restore();
    }
}
 

import playn.core.Image; //导入依赖的package包/类
public SpriteImage(final Image image, int x, int y, int width, int height) {
  this.image = image;
  this.x = x;
  this.y = y;
  this.width = width;
  this.height = height;
}
 

import playn.core.Image; //导入依赖的package包/类
@Override public void create (final Showcase game, Closeable.Set onClose) {
  // create a group layer to hold everything
  final GroupLayer layer = new GroupLayer();
  game.rootLayer.add(layer);
  onClose.add(layer);

  // load a sound that we'll play when placing sprites
  final Sound ding = game.plat.assets().getSound("sprites/ding");

  // create and add background image layer
  Image bgImage = game.plat.assets().getImage("background.png");
  IDimension viewSize = game.plat.graphics().viewSize;
  ImageLayer bg = new ImageLayer(bgImage).setSize(viewSize);
  layer.add(bg);

  final List<Pea> peas = new ArrayList<>();

  // add a listener for pointer (mouse, touch) input
  bg.events().connect(new Pointer.Listener() {
    public void onStart (Pointer.Interaction iact) {
      peas.add(newPea(game.plat, layer, ding, iact.event.x, iact.event.y));
    }
  });

  peas.add(newPea(game.plat, layer, ding, viewSize.width() / 2, viewSize.height() / 2));

  onClose.add(game.paint.connect(new Slot<Clock>() {
    public void onEmit (Clock clock) {
      for (Pea pea : peas) pea.update(clock);
    }
  }));
}
 

import playn.core.Image; //导入依赖的package包/类
private static void loadSprite (Platform plat, Image[] images, Sprite sprite, Json.Object json,
                                RPromise<Sprite> state) {
  // parse image urls, if necessary
  if (images == null) {
    Json.Array urls = json.getArray("urls");
    assert urls != null : "No urls provided for sprite images";
    images = new Image[urls.length()];
    for (int ii = 0; ii < urls.length(); ii++) {
      images[ii] = plat.assets().getImage(urls.getString(ii));
    }
  }

  // parse the sprite images
  Json.Array spriteImages = json.getArray("sprites");
  for (int i = 0; i < spriteImages.length(); i++) {
    Json.Object jsonSpriteImage = spriteImages.getObject(i);
    String id = jsonSpriteImage.getString("id");
    int imageId = jsonSpriteImage.getInt("url"); // will return 0 if not specified
    assert imageId < images.length : "URL must be an index into the URLs array";
    int x = jsonSpriteImage.getInt("x");
    int y = jsonSpriteImage.getInt("y");
    int width = jsonSpriteImage.getInt("w");
    int height = jsonSpriteImage.getInt("h");
    SpriteImage spriteImage = new SpriteImage(images[imageId], x, y, width, height);
    sprite.addSpriteImage(id, spriteImage);
  }

  // complete the sprite once the (zero or more) images have finished loading
  List<RFuture<Image>> states = new ArrayList<>();
  for (Image image : images) states.add(image.state);
  RFuture.collect(states).map(Functions.constant(sprite)).onComplete(state.completer());
}
 

import playn.core.Image; //导入依赖的package包/类
public Pea(final GroupLayer peaLayer, float x, float y) {
  Image image = plat.assets().getImage("images/pea.png");
  final ImageLayer layer = new ImageLayer(image);
  layer.setOrigin(ImageLayer.Origin.CENTER);
  peaLayer.addAt(layer, x, y);

  // connect to the paint signal to animate our rotation
  paint.connect(new Slot<Clock>() {
    @Override public void onEmit (Clock clock) {
      layer.setRotation(clock.tick * angVel);
    }
  });
}
 

import playn.core.Image; //导入依赖的package包/类
public DynamicPhysicsEntity(PeaWorld peaWorld, World world, Image image,
                            float x, float y, float angle) {
  super(peaWorld, image, x, y, angle);
  body = initPhysicsBody(world, x, y, angle);
  setPos(x, y);
  setAngle(angle);
}
 

import playn.core.Image; //导入依赖的package包/类
/** Informs this layer that a drawing operation has just completed. The backing canvas image data
  * is uploaded to the GPU. */
public void end () {
  Texture tex = (Texture)tile();
  Image image = canvas.image;
  // if our texture is already the right size, just update it
  if (tex != null && tex.pixelWidth == image.pixelWidth() &&
      tex.pixelHeight == image.pixelHeight()) tex.update(image);
  // otherwise we need to create a new texture (setTexture will unreference the old texture which
  // will cause it to be destroyed)
  else super.setTile(canvas.image.createTexture(Texture.Config.DEFAULT));
}
 

import playn.core.Image; //导入依赖的package包/类
@Override public Image getRemoteImage(final String url, int width, int height) {
  final JavaImage image = new JavaImage(plat, true, width, height, url);
  exec.invokeAsync(new Runnable() {
    public void run () {
      try {
        BufferedImage bmp = ImageIO.read(new URL(url));
        image.succeed(new ImageImpl.Data(Scale.ONE, bmp, bmp.getWidth(), bmp.getHeight()));
      } catch (Exception error) {
        image.fail(error);
      }
    }
  });
  return image;
}
 

import playn.core.Image; //导入依赖的package包/类
protected BufferedImage scaleImage(BufferedImage image, float viewImageRatio) {
  int swidth = MathUtil.iceil(viewImageRatio * image.getWidth());
  int sheight = MathUtil.iceil(viewImageRatio * image.getHeight());
  BufferedImage scaled = new BufferedImage(swidth, sheight, BufferedImage.TYPE_INT_ARGB_PRE);
  Graphics2D gfx = scaled.createGraphics();
  gfx.drawImage(image.getScaledInstance(swidth, sheight, java.awt.Image.SCALE_SMOOTH), 0, 0, null);
  gfx.dispose();
  return scaled;
}
 

import playn.core.Image; //导入依赖的package包/类
@Test public void testMissingImage() {
  final StringBuilder buf = new StringBuilder();
  plat.log().setCollector(new Log.Collector() {
    public void logged(Log.Level level, String msg, Throwable cause) {
      buf.append(msg).append("\n");
    }
  });

  Image missing;
  try {
    missing = plat.assets().getImageSync("missing.png");
  } finally {
    plat.log().setCollector(null);
  }

  assertNotNull(missing);

  // ensure that width/height do not NPE
  missing.width();
  missing.height();

  // TODO: depending on the error text is somewhat fragile, but I want to be sure that a
  // reasonably appropriate error was logged
  String errlog = buf.toString();
  assertTrue(errlog + " must contain 'Could not load image'",
             errlog.startsWith("Could not load image"));
  assertTrue(errlog + " must contain 'missing.png'",
             errlog.contains("missing.png"));
}
 

import playn.core.Image; //导入依赖的package包/类
public Image getImage(ImageKey key) {
    Image image = imageCache.get(key);
    if (image == null) {
        throw new UnsupportedOperationException("Cannot currently get images that are not cached (attempted to get " + key + ")");
    }
    return image;
}
 

import playn.core.Image; //导入依赖的package包/类
@Test
public void testEquals() {
    EmployeeProfile profile1 = mock(EmployeeProfile.class);
    Image image1 = mock(Image.class);
    Employee e1 = new Employee(profile1, image1);
    Employee e1Duplicate = new Employee(profile1, image1);
    Employee e2 = new Employee(mock(EmployeeProfile.class), mock(Image.class));
    new EqualsTester()
            .addEqualityGroup(e1, e1Duplicate)
            .addEqualityGroup(e2)
            .testEquals();
}