Examples of java.awt.Graphics2D.drawImage()

java.awt.Graphics2D.drawImage()
Renders an image, applying a transform from image space into user space before drawing. The transformation from user space into device space is done with the current Transform in the Graphics2D. The specified transformation is applied to the image before the transform attribute in the Graphics2D context is applied. The rendering attributes applied include the Clip, Transform, and Composite attributes. Note that no rendering is done if the specified transform is noninvertible. @param img the specified image to be rendered. This method does nothing if img is null. @param xform the transformation from image space into user space @param obs the {@link ImageObserver}to be notified as more of the Image is converted @return true if the Image is fully loaded and completely rendered, or if it's null; false if the Image is still being loaded. @see #transform @see #setTransform @see #setComposite @see #clip @see #setClip

            Composite oldComposite = g2.getComposite();


            if(opacity != 1.0f) {
                g2.setComposite(AlphaComposite.SrcOver.derive(opacity));
            }
            g2.drawImage(image, null, x, y);


            g2.setComposite(oldComposite);
        }
    }

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            @Override
            protected void paintComponent(Graphics g) {
                Graphics2D g2 = (Graphics2D)g;
                g2.setColor(Color.black);
                g2.fillRect(0, 0, getWidth(), getHeight());
                g2.drawImage(image, null, 0, 0);
                g2.setColor(Color.white);
                g2.setFont(font);
                g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
                g2.drawString("lightweight overlay", 100, 200);
            }

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        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setContentPane(new JPanel() {
            @Override
            protected void paintChildren(Graphics g) {
                Graphics2D g2 = (Graphics2D)g;
                g2.drawImage(img, null, 0, 0);
            }


            @Override
            public Dimension getPreferredSize() {
                return new Dimension(img.getWidth(), img.getHeight());

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        }


        @Override
        public void paint(Graphics g) {
            Graphics2D g2 = (Graphics2D)g;
            g2.drawImage(image, null, 0, 0);
            // You could draw on top of the image here...
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
            g2.setColor(Color.red);
            g2.setComposite(AlphaComposite.SrcOver.derive(0.3f));

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          final BufferedImage bi = new BufferedImage(
              img.getWidth(null), img.getHeight(null),
              BufferedImage.TYPE_INT_RGB);


          final Graphics2D g2 = bi.createGraphics();
          g2.drawImage(img, 0, 0, null);
          g2.dispose();
          ImageIO.write(bi, "jpg", new File(Constants.DATA_PATH
              + "livestream/art.jpg"));
        } catch (final IOException e) {
          // TODO Auto-generated catch block

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      // We do not need to pass in an ImageObserver, because we are working
      // with BufferedImages. ImageObservers only need to be used when
      // the image to be drawn is being loaded asynchronously. See
      // http://java.sun.com/docs/books/tutorial/2d/images/drawimage.html
      // for more information.
      g2d.drawImage(imageRect.image, imageRect.left, 0, null);
    }
    g2d.dispose();


    return bundledImage;
  }

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        BufferedImage scaledRndMap = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = scaledRndMap.createGraphics();
        try {
          g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
              RenderingHints.VALUE_INTERPOLATION_BICUBIC);
          g.drawImage(rndMap, 0, 0, width, height, 0, 0, frequencyX, frequencyY, null);
        }
        finally {
          g.dispose();
        }
        mainGr.drawImage(scaledRndMap, null, 0, 0);

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        graphics.setComposite(AlphaComposite.Clear);
        graphics.fillRect(0, 0, original.getWidth(), original.getHeight());


        // Add the original image
        graphics.setComposite(AlphaComposite.Src);
        graphics.drawImage(original, 0, 0, null);


        // Merge in the color filter
        graphics.setComposite(new MultiplyBlendComposite(alpha));
        graphics.drawImage(colorBlend, 0, 0, null);
        graphics.dispose();

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        graphics.setComposite(AlphaComposite.Src);
        graphics.drawImage(original, 0, 0, null);


        // Merge in the color filter
        graphics.setComposite(new MultiplyBlendComposite(alpha));
        graphics.drawImage(colorBlend, 0, 0, null);
        graphics.dispose();


        return image;
    }

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      int imgH = bgImg.getHeight();


      if ((float)w/h < (float)imgW/imgH) {
        int tw = h * imgW/ imgH;
        int th = h;
        gg.drawImage(bgImg, (w-tw)/2, 0, tw, th, null);
      } else {
        int tw = w;
        int th = w * imgH / imgW;
        gg.drawImage(bgImg, 0, (h-th)/2, tw, th, null);
      }

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