/**
* Renders the image at the proper size into <code>bgImage</code>. This method assumes that <code>
* bgImage</code> is not <code>null</code>.
*
* @param width The width of the volatile image to render into.
* @param height The height of the volatile image to render into.
* @param hint The scaling hint to use.
*/
protected void renderImage(int width, int height, int hint) {
Image master = getMasterImage();
if (master != null) {
do {
Image i = master.getScaledInstance(width, height, hint);
tracker.addImage(i, 1);
try {
tracker.waitForID(1);
} catch (InterruptedException e) {
e.printStackTrace();
bgImage = null;
return;
} finally {
tracker.removeImage(i, 1);
}
bgImage.getGraphics().drawImage(i, 0, 0, null);
tracker.addImage(bgImage, 0);
try {
tracker.waitForID(0);
} catch (InterruptedException e) {
e.printStackTrace();
bgImage = null;
return;
} finally {
tracker.removeImage(bgImage, 0);
}
} while (bgImage.contentsLost());
} // End of if (master!=null).
else {
bgImage = null;
}
}
/**
* Paints the image at the specified location. This method assumes scaling has already been done,
* and simply paints the background image "as-is."
*
* @param g The graphics context.
* @param x The x-coordinate at which to paint.
* @param y The y-coordinate at which to paint.
*/
protected void paintImage(Graphics g, int x, int y) {
if (bgImage != null) {
do {
int rc = bgImage.validate(null); // getGraphicsConfiguration());
if (rc == VolatileImage.IMAGE_RESTORED) {
// FIXME: If the image needs to be restored are its width
// and height still valid?? If not, we'll need to cache
// these values...
renderImage(bgImage.getWidth(), bgImage.getHeight(), getScalingHint());
}
g.drawImage(bgImage, x, y, null);
} while (bgImage.contentsLost());
}
}
private static void test(BufferedImage bi, int type) throws IOException {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsConfiguration gc = ge.getDefaultScreenDevice().getDefaultConfiguration();
VolatileImage vi = gc.createCompatibleVolatileImage(511, 255, type);
BufferedImage gold = gc.createCompatibleImage(511, 255, type);
// draw to compatible Image
Graphics2D big = gold.createGraphics();
// force scaled blit
big.drawImage(bi, 7, 11, 127, 111, 7, 11, 127 * 2, 111, null);
big.dispose();
// draw to volatile image
BufferedImage snapshot;
while (true) {
vi.validate(gc);
if (vi.validate(gc) != VolatileImage.IMAGE_OK) {
try {
Thread.sleep(100);
} catch (final InterruptedException ignored) {
}
continue;
}
Graphics2D vig = vi.createGraphics();
// force scaled blit
vig.drawImage(bi, 7, 11, 127, 111, 7, 11, 127 * 2, 111, null);
vig.dispose();
snapshot = vi.getSnapshot();
if (vi.contentsLost()) {
try {
Thread.sleep(100);
} catch (final InterruptedException ignored) {
}
continue;
}
break;
}
// validate images
for (int x = 7; x < 127; ++x) {
for (int y = 11; y < 111; ++y) {
if (gold.getRGB(x, y) != snapshot.getRGB(x, y)) {
ImageIO.write(gold, "png", new File("gold.png"));
ImageIO.write(snapshot, "png", new File("bi.png"));
throw new RuntimeException("Test failed.");
}
}
}
}