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The Java Developers Almanac 1.4Order this book from Amazon. |
e669. Drawing on a Buffered ImageTo draw on a buffered image, create a graphics context on the buffered image.// Create a graphics context on the buffered image Graphics2D g2d = bimage.createGraphics(); // Draw on the image g2d.setColor(Color.red); g2d.fill(new Ellipse2D.Float(0, 0, 200, 100)); g2d.dispose();If the buffered image supports transparency, (see e661 Determining If an Image Has Transparent Pixels), pixels can be made transparent: g2d = bimage.createGraphics(); // Make all filled pixels transparent Color transparent = new Color(0, 0, 0, 0); g2d.setColor(transparent); g2d.setComposite(AlphaComposite.Src); g2d.fill(new Rectangle2D.Float(20, 20, 100, 20)); g2d.dispose();
e667. Creating a Buffered Image from an Image e668. Creating a Buffered Image from an Array of Color-Indexed Pixel Values e670. Converting a Buffered Image to an Image e671. Getting and Setting Pixels in a Buffered Image e672. Scaling, Shearing, Translating, and Rotating a Buffered Image
© 2002 Addison-Wesley. |