Rounding in draw operations

The image (one of the samples from the Batik SVG renderer) on the left was rendered using Classpath; the image to the right using Sun’s VM. Notice how the borders of the chessboard are blurred in the Classpath image… this is due to a minor precision problem in the float/double. Rounding solves it, but perhaps rounding is only a band-aid solution to a different root problem?

( I’m really not a blogger, am I… last entry was 6 months ago…)