public WritableRaster copyData(WritableRaster wr) {
        GraphicsUtil.copyData(theTile, wr);
        return wr;
    }
Reads in an image of a given size and returns it as a
WritableRaster.
plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGRed.java