rendering image doesn't work every time

Java 2D
#1

Hi,
I’m having the following strange problem (sometimes it works sometimes not).
Every tile of my map is prerendered at the beginning of the game:


private void prerender(int iTile) {
     BufferedImage renderedTile = mGfxConfig.createCompatibleImage(Tile.WIDTH, Tile.HEIGHT, Transparency.BITMASK);
     Graphics2D g2D = renderedTile.createGraphics();
     g2D.drawImage((Image) mTileImages.get("plain"), 0, 0, null);
     //...
     mRenderedTiles.put(new Integer(iTile), renderedTile);
     g2D.dispose();
}

Ok. Here’s the method putTile which is called by the main render loop:


public void putTile(Graphics g, int x, int y, int iTile) {
     if(!mRenderedTiles.containsKey(new Integer(iTile)))
           prerender(iTile);
     g.drawImage((BufferedImage) mRenderedTiles.get(new Integer(iTile)), x, y, null);
}

Ok, now the problem is: sometimes it works but often it doesn’t. Sometimes mRenderedTiles contains just empty images with nothing painted on.
What could be the problem?

#2

how are you loadng the tile images? (the ones stored in mTileImages)

#3

with Toolkit.getDefaultToolkit().getImage(…);

#4

and are you using a MediaTracker to ensure the image is fully loaded before you attempt to use it?

Sounds like you arn’t.

Either use MediaTracker, or the better solution, use javax.imageio.ImageIO.read().

#5

Uhhuhuuuuu, that hurts. Thanks, man.