/**
* Create possibly volatile scratch image for fast painting. A scratch image can become
* invalidated, when this happens any actions involving it are ignored, and it needs to be
* recreated. Use isScratchImageValid() to check this.
*/
public static Image createScratchImage(int width, int height) {
try {
Image img =
(Image)
tryMethod(
output_comp,
"createVolatileImage",
new Object[] {new Integer(width), new Integer(height)});
if (img == null) {
// no such method -> create regular image
return output_comp.createImage(width, height);
}
// if (img.validate(output_comp.getGraphicsConfiguration())
// == VolatileImage.IMAGE_INCOMPATIBLE) {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
Integer valid = (Integer) tryMethod(img, "validate", new Object[] {gc});
// output_comp.getGraphicsConfiguration() });
if (valid.intValue() == 2) { // I checked, IMAGE_INCOMPATIBLE=2
// Hmm, somehow it didn't work. Create regular image.
return output_comp.createImage(width, height);
}
return img;
} catch (java.security.AccessControlException e) {
// we're not allowed to do this (we're probably an applet)
return output_comp.createImage(width, height);
}
}
private static GraphicsDevice getScreen(JFrame window) {
for (GraphicsDevice gd : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()) {
if (gd.getDefaultConfiguration().getBounds().contains(window.getLocationOnScreen()))
return gd;
}
System.err.println(
window + " does not appear to be on any screen; fullscreening onto default screen");
return GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
}
/** Create empty image with given alpha mode that should be efficient on this display */
public static BufferedImage createCompatibleImage(int width, int height, int transparency) {
// try {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
// always use bitmask transparency
BufferedImage bimage = gc.createCompatibleImage(width, height, transparency);
return bimage;
// } catch (HeadlessException e) { // this exception is not in 1.2
// The system does not have a screen
// e.printStackTrace();
// return null;
// }
}
public static BufferedImage tileImage(BufferedImage im, int width, int height) {
GraphicsConfiguration gc =
GraphicsEnvironment.getLocalGraphicsEnvironment()
.getDefaultScreenDevice()
.getDefaultConfiguration();
int transparency = Transparency.OPAQUE; // Transparency.BITMASK;
BufferedImage compatible = gc.createCompatibleImage(width, height, transparency);
Graphics2D g = (Graphics2D) compatible.getGraphics();
g.setPaint(new TexturePaint(im, new Rectangle(0, 0, im.getWidth(), im.getHeight())));
g.fillRect(0, 0, width, height);
return compatible;
}