java.awt.AlphaComposite#getInstance ( )源码实例Demo

public void paint(Graphics g) {
       // Create an image for the button graphics if necessary
       if (buttonImage == null || buttonImage.getWidth() != getWidth() ||
               buttonImage.getHeight() != getHeight()) {
           buttonImage = getGraphicsConfiguration().
                   createCompatibleImage(getWidth(), getHeight());
       }
       Graphics gButton = buttonImage.getGraphics();
       gButton.setClip(g.getClip());
       
       //  Have the superclass render the button for us
       super.paint(gButton);
       
       // Make the graphics object sent to this paint() method translucent
Graphics2D g2d  = (Graphics2D)g;
AlphaComposite newComposite = 
    AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
g2d.setComposite(newComposite);
       
       // Copy the button's image to the destination graphics, translucently
       g2d.drawImage(buttonImage, 0, 0, null);
   }
 

static public Composite getComposite( byte mode, float alpha )
{
	final Composite composite;
	switch ( mode )
	{
	case Displayable.COMPOSITE_ADD:
		composite = AddARGBComposite.getInstance( alpha );
		break;
	case Displayable.COMPOSITE_SUBTRACT:
		composite = SubtractARGBComposite.getInstance( alpha );
		break;
	case Displayable.COMPOSITE_MULTIPLY:
		composite = MultiplyARGBComposite.getInstance( alpha );
		break;
	case Displayable.COMPOSITE_DIFFERENCE:
		composite = DifferenceARGBComposite.getInstance( alpha );
		break;
	case Displayable.COMPOSITE_COLOR_YCBCR:
		composite = ColorYCbCrComposite.getInstance( alpha );
		break;
	default:
		composite = AlphaComposite.getInstance( AlphaComposite.SRC_OVER, alpha );
	}
	return composite;
}
 

@Override
public void paintGhost(InstancePainter painter) {
	Graphics g = painter.getGraphics();
	Color fg = g.getColor();
	int v = fg.getRed() + fg.getGreen() + fg.getBlue();
	Composite oldComposite = null;
	if (g instanceof Graphics2D && v > 50) {
		oldComposite = ((Graphics2D) g).getComposite();
		Composite c = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f);
		((Graphics2D) g).setComposite(c);
	}
	paintBase(painter, g);
	if (oldComposite != null) {
		((Graphics2D) g).setComposite(oldComposite);
	}
}
 

/**
 * Creates a new instance of DefaultPolarItemRenderer
 */
public DefaultPolarItemRenderer() {
    this.seriesFilled = new BooleanList();
    this.drawOutlineWhenFilled = true;
    this.fillComposite = AlphaComposite.getInstance(
            AlphaComposite.SRC_OVER, 0.3f);
    this.useFillPaint = false;     // use item paint for fills by default
    this.legendLine = new Line2D.Double(-7.0, 0.0, 7.0, 0.0);
    this.shapesVisible = true;
    this.connectFirstAndLastPoint = true;
    
    this.toolTipGeneratorList = new ObjectList();
    this.urlGenerator = null;
    this.legendItemToolTipGenerator = null;
    this.legendItemURLGenerator = null;
}
 

/**
 * Creates a blend composite
 *
 * @param blendMode Desired blend mode
 * @param constantAlpha Constant alpha, must be in the inclusive range [0.0...1.0] or it will be clipped.
 * @return a blend composite.
 */
public static Composite getInstance(BlendMode blendMode, float constantAlpha)
{
    if (constantAlpha < 0)
    {
        LOG.warn("using 0 instead of incorrect Alpha " + constantAlpha);
        constantAlpha = 0;
    }
    else if (constantAlpha > 1)
    {
        LOG.warn("using 1 instead of incorrect Alpha " + constantAlpha);
        constantAlpha = 1;
    }
    if (blendMode == BlendMode.NORMAL)
    {
        return AlphaComposite.getInstance(AlphaComposite.SRC_OVER, constantAlpha);
    }
    else
    {
        return new BlendComposite(blendMode, constantAlpha);
    }
}
 

/**
 * Paints the current state (i.e. the state corresponding to the current
 * phase) of the given component.
 *
 * @param g graphics context.
 * @param comp component to paint.
 */
private void paintComponent(Graphics g, Component comp) {
    Rectangle bounds = currentBounds(comp);
    float alpha = currentAlpha(comp);
    Graphics gg = g.create(bounds.x, bounds.y, bounds.width, bounds.height);
    if (alpha != 1f) {
        AlphaComposite alphaComposite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
        ((Graphics2D)gg).setComposite(alphaComposite);
    }
    comp.setBounds(bounds);
    comp.validate();
    // Intentionally using print instead of paint.
    // Print doesn't use double buffering and it solves some mysterious
    // problems with modified clip during painting of containers.
    // BTW: animated transitions library also uses print()
    if (comp instanceof JComponent) {
        comp.print(gg);
    } else {
        java.awt.peer.ComponentPeer peer = FakePeerSupport.getPeer(comp);
        if (peer != null) {
            peer.paint(gg);
        }
    }
    gg.dispose();
}
 

/**
 * Creates a new instance of DefaultPolarItemRenderer
 */
public DefaultPolarItemRenderer() {
    this.seriesFilled = new BooleanList();
    this.drawOutlineWhenFilled = true;
    this.fillComposite = AlphaComposite.getInstance(
            AlphaComposite.SRC_OVER, 0.3f);
    this.useFillPaint = false;     // use item paint for fills by default
    this.legendLine = new Line2D.Double(-7.0, 0.0, 7.0, 0.0);
    this.shapesVisible = true;
    this.connectFirstAndLastPoint = true;
    
    this.toolTipGeneratorList = new ObjectList();
    this.urlGenerator = null;
    this.legendItemToolTipGenerator = null;
    this.legendItemURLGenerator = null;
}
 

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;

    // �A���t�@�l
    AlphaComposite composite = AlphaComposite.getInstance(
            AlphaComposite.SRC_OVER, 0.5f);

    g2.setColor(Color.RED);
    g2.fillOval(50, 50, 100, 100);

    // �A���t�@�l���Z�b�g�i�Ȍ�̕`��͔������ɂȂ�j
    g2.setComposite(composite);

    g2.setColor(Color.BLUE);
    g2.fillRect(90, 90, 100, 100);
}
 

/**
 * Creates a new instance.
 *
 * @param gc  the graphics context.
 */
public SWTGraphics2D(GC gc) {
    super();
    this.gc = gc;
    this.hints = new RenderingHints(null);
    this.composite = AlphaComposite.getInstance(AlphaComposite.SRC, 1.0f);
    setStroke(new BasicStroke());
}
 

/**
 * Serialize an <code>AlphaComposite</code>, restore it, and check for
 * equality.
 */
public void testAlphaCompositeSerialization() {

    final Composite c1 = AlphaComposite.getInstance(2, 0.345f);
    Composite c2 = null;

    try {
        final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        final ObjectOutputStream out = new ObjectOutputStream(buffer);
        SerialUtilities.writeComposite(c1, out);
        out.close();

        final ByteArrayInputStream bias = new ByteArrayInputStream(
                buffer.toByteArray());
        final ObjectInputStream in = new ObjectInputStream(bias);
        c2 = SerialUtilities.readComposite(in);
        in.close();
    }
    catch (Exception e) {
        e.printStackTrace();
    }

    // we want to check that the two objects are equal, but can't rely on
    // AlphaComposite's equals() method because it is just the default
    // method inherited from Object...
    final AlphaComposite ac1 = (AlphaComposite) c1;
    final AlphaComposite ac2 = (AlphaComposite) c2;
    assertEquals(ac1.getRule(), ac2.getRule());
    assertEquals(ac1.getAlpha(), ac2.getAlpha(), 0.001f);
}
 

/**
 * Creates a new instance.
 *
 * @param gc  the graphics context.
 */
public SWTGraphics2D(GC gc) {
    super();
    this.gc = gc;
    this.hints = new RenderingHints(null);
    this.composite = AlphaComposite.getInstance(AlphaComposite.SRC, 1.0f);
    setStroke(new BasicStroke());
}
 

public void setTransparency(float transparency) {
  if ((transparency > 1.0) || (transparency < 0))
    transparency = 1.0f;
  int type = AlphaComposite.SRC_OVER;
  alphaComp = (AlphaComposite.getInstance(type, transparency));
  alphaCompOriginal = (AlphaComposite.getInstance(type, 1.0f));
}
 

private void rotateIconImage() {

        final int W = 24;
        final int H = 24;

        final BufferedImage image = ImageHelper.getCompatibleBufferedImage(
            W, H, BufferedImage.TRANSLUCENT
        );
        Graphics2D g2d = image.createGraphics();

        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        // This makes a big difference to quality of rotated image if rotation is not a factor of 90 degrees.
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC) ;

        g2d.setTransform(AffineTransform.getRotateInstance(
                Math.toRadians(INTERVAL * position),
                W * 0.5d, H * 0.5d)
        );

        g2d.setPaint(tintColor);
        g2d.fillOval(2, 2, W-4, H-4);
        AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OUT);
        g2d.setComposite(ac);
        g2d.fillOval((W - 8) / 2, 3, 8, 8);
        g2d.dispose();

        super.setIcon(new ImageIcon(image));
    }
 

/**
 * {@inheritDoc}
 */
@Override
public void setGlobalAlpha(final double globalAlpha) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("[" + id_ + "] setGlobalAlpha(" + globalAlpha + ")");
    }

    if (globalAlpha >= 0 && globalAlpha <= 1) {
        globalAlpha_ = (float) globalAlpha;
        final AlphaComposite composite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, globalAlpha_);
        graphics2D_.setComposite(composite);
    }
}
 

/**
 * Creates a new instance.
 *
 * @param gc  the graphics context.
 */
public SWTGraphics2D(GC gc) {
    super();
    this.gc = gc;
    this.hints = new RenderingHints(null);
    this.composite = AlphaComposite.getInstance(AlphaComposite.SRC, 1.0f);
    setStroke(new BasicStroke());
}
 

public static BufferedImage indicateCircle(BufferedImage source,
        Color color, int lineWidth, DoubleCircle circle) {
    try {
        if (!circle.isValid()) {
            return source;
        }
        int width = source.getWidth();
        int height = source.getHeight();
        int imageType = source.getType();
        if (imageType == BufferedImage.TYPE_CUSTOM) {
            imageType = BufferedImage.TYPE_INT_ARGB;
        }
        BufferedImage target = new BufferedImage(width, height, imageType);
        Graphics2D g = target.createGraphics();
        g.drawImage(source, 0, 0, width, height, null);
        AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
        g.setComposite(ac);
        g.setColor(color);
        BasicStroke stroke = new BasicStroke(lineWidth, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER,
                1f, new float[]{lineWidth, lineWidth}, 0f);
        g.setStroke(stroke);
        g.drawOval((int) circle.getCenterX() - (int) circle.getRadius(), (int) circle.getCenterY() - (int) circle.getRadius(),
                2 * (int) circle.getRadius(), 2 * (int) circle.getRadius());
        g.dispose();
        return target;
    } catch (Exception e) {
        logger.error(e.toString());
        return source;
    }
}
 

public void paint(Graphics _g) {
  //    System.out.println("paint()");
  if(isPainting) return;
  isPainting = true;

  synchronized(paintLock) {
    zoom();

    if(use2D) {
      if(alphaHalf == null) {
        alphaHalf = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .7f);
      }
    }

    Graphics g = _g;

    makeOff(false);

    if(memG == null) return;

    long start = System.currentTimeMillis();
    paintBg(memG);

    bgTime = System.currentTimeMillis() - start;

    if(use2D) {
      ((Graphics2D)memG).
        setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                         bAntiAlias
                         ? RenderingHints.VALUE_ANTIALIAS_ON
                         : RenderingHints.VALUE_ANTIALIAS_OFF);
    }

    paintBundles(memG);
    spriteTime = System.currentTimeMillis() - bgTime - start;

    paintServices(memG);
    fgTime = System.currentTimeMillis() - spriteTime - start;


    if(bShowBundleLegend) {
      paintBundleStateLegend(memG);
    }

    SpinItem infoItem = getInfoItem();

    if(infoItem != null) {
      if(bShowBundleInfo) {
        infoItem.paintInfo(memG, 10, size.height - 100);
      }
    }

    if(bShowConsole) {
      console.paint(memG);
    }


    if(bShowFrameRate) {
      paintFrameRate(memG);
    }

    if(bShowHelp) {
      paintHelp(memG, size.width/2-100, 50);
    }
    if(bShowDeps) {
      paintDeps(memG,
                (hotX > size.width / 2) ? 40 : (size.width / 2),
                20);
    }

    if(bSearchMode) {
      paintSearch(memG, 10, size.height - 140);
    }

    if(use2D) {
      ((Graphics2D)memG).
        setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                         RenderingHints.VALUE_ANTIALIAS_OFF);
    }

    g.drawImage(memImage, 0, 0, null);

  }
  isPainting = false;
}
 

private AlphaComposite makeComposite(double alpha) {
  int type = AlphaComposite.SRC_OVER;
  return (AlphaComposite.getInstance(type, (float) alpha));
}
 

/**
 * combineBufferedImage.
 * SCIPIO: 2017-07-10: modified to take a typeReferenceImage instance of bufImgType, so we have the full
 * information to replicate the original image type, needed for indexed images.
 */
public static BufferedImage combineBufferedImage(Image image1, Image image2, BufferedImage typeReferenceImage) {
    // Full image loading
    image1 = new ImageIcon(image1).getImage();
    image2 = new ImageIcon(image2).getImage();

    // New BufferedImage creation
    // SCIPIO: indexed images fix
    BufferedImage bufferedImage;
    Graphics2D g;
    if (image1 instanceof BufferedImage && ImagePixelType.isTypeImageOpFriendly(((BufferedImage) image1).getType())) {
        // still create a copy to avoid modifying the original
        bufferedImage = ImageTransform.cloneBufferedImage((BufferedImage) image1);
        g = bufferedImage.createGraphics();
    } else {
        bufferedImage = ImageTransform.createBufferedImage(ImageType.DEFAULT_IMAGEOP.getImageTypeInfoFor(typeReferenceImage), image1.getWidth(null),
                image1.getHeight(null));
        g = bufferedImage.createGraphics();
        g.drawImage(image1, null, null);
    }

    // Draw Image combine
    Point2D center = new Point2D.Float(bufferedImage.getHeight() / 2f, bufferedImage.getWidth() / 2f);
    AffineTransform at = AffineTransform.getTranslateInstance(center.getX( ) - (image2.getWidth(null) / 2f), center.getY( ) - (image2.getHeight(null) / 2f));
    g.transform(at);
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g.drawImage(image2, 0, 0, null);
    Composite c = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .35f);
    g.setComposite(c);
    at = AffineTransform.getTranslateInstance(center.getX( ) - (bufferedImage.getWidth(null) / 2f), center.getY( ) - (bufferedImage.getHeight(null) / 2f));
    g.setTransform(at);
    g.drawImage(bufferedImage, 0, 0, null);
    g.dispose();

    // SCIPIO: new: we convert to the target type only at the very end, in separate step, so the previous operations don't suffer from color loss
    if (ImageType.imageMatchesRequestedType(bufferedImage, typeReferenceImage)) {
        return bufferedImage;
    } else {
        BufferedImage resultImage = ImageTransform.createCompatibleBufferedImage(typeReferenceImage, bufferedImage.getWidth(null), bufferedImage.getHeight(null));
        ImageTransform.copyToBufferedImage(bufferedImage, resultImage);
        return( resultImage );
    }
}
 

public BufferedImage drawData() {
    try {
        image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        g = image.createGraphics();
        if (bgColor != null) {
            g.setColor(bgColor);
            g.fillRect(0, 0, width, height);

        }
        if (fontSize <= 0) {
            fontSize = 20;
        }
        dataFont = new Font(null, Font.PLAIN, fontSize);
        commentsFont = new Font(null, Font.BOLD, fontSize + 8);
        if (Color.BLACK.equals(bgColor)) {
            textColor = Color.WHITE;
        } else {
            textColor = Color.BLACK;
        }

        // Title / Bottom
        AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f);
        g.setComposite(ac);
        if (title == null) {
            title = message("ChromaticityDiagram");
        }
        g.setFont(commentsFont);
        g.setColor(textColor);
        g.drawString(title, margins + 400, 50);
        g.setFont(dataFont);
        g.drawString(message("ChromaticityDiagramComments"), 20, endH + 55);

        backGround();
        outlines();
        whitePoints();
        primariesLines();
        calculate();

        g.dispose();
        return image;
    } catch (Exception e) {
        logger.error(e.toString());
        return null;
    }
}