How do you double buffer in java for a game?

by

Double buffering is conceptually pretty simple, instead of drawing your objects one by one, you draw them on an image and then tell the renderer to draw that entire image. This eliminates the flickering.

Here’s an example of how you might do this (source)

class DoubleBufferedCanvas extends Canvas {

    public void update(Graphics g) {
    Graphics offgc;
    Image offscreen = null;
    Dimension d = size();

    // create the offscreen buffer and associated Graphics
    offscreen = createImage(d.width, d.height);
    offgc = offscreen.getGraphics();
    // clear the exposed area
    offgc.setColor(getBackground());
    offgc.fillRect(0, 0, d.width, d.height);
    offgc.setColor(getForeground());
    // do normal redraw
    paint(offgc);
    // transfer offscreen to window
    g.drawImage(offscreen, 0, 0, this);
    }
}

Nowdays, you don’t have to implement this yourself, you can use the BufferStrategy and releated classes. See lakam99’s answer for an example of that .

More Related Contents:

  1. Setting background color for a JFrame
  2. Ray Casting with different height size
  3. Drawing Multiple JComponents to a Frame
  4. Draw with lines in Java
  5. Dynamic Graphics Object Painting
  6. How to setSize of image using RescaleOp
  7. How to convert a 3D point into 2D perspective projection?
  8. Graphics rendering in title bar
  9. java multiple graphics [closed]
  10. How to draw a decent looking Circle in Java
  11. calling a java method to draw graphics
  12. setOpaque(true/false); Java
  13. Why does calling dispose() on Graphics object cause JPanel to not render any components
  14. How to add text to an image in java?
  15. AffineTransform.rotate() – how do I xlate, rotate, and scale at the same time?
  16. CubicCurve JavaFX
  17. Java make a directed line and make it move
  18. Secure Desktop Mode effect for java application
  19. How do I paint multiple objetcs that move at different speeds in Java?
  20. Java: how to do double-buffering in Swing?
  21. Reverse Java Graphics2D scaled and rotated coordinates
  22. What does super.paintComponent(g) do?
  23. Scaling/Translating a Shape to a given Rectangle using AffineTransform
  24. repaint() in Java [duplicate]
  25. Animating dashed-line with java.awt.BasicStroke
  26. Java AWT/SWT/Swing: How to plan a GUI?
  27. Drawing in Java using Canvas
  28. Creating a draw rectangle (filled with black color) function in Java for a grid
  29. Clicking on a drawn object
  30. Swing repaint() doesn’t work in loop or thread

Leave a Comment