Hi,
In a certain piece of code we were using Jai to dither a rendering of our chart objects, however this caused some performance issues and we noticed the RenderingHints.KEY_DITHERING so we tried moving the dithering into the rendering of the chart that was already using the graphics2D of a bufferedImage. While very performant, it doesn't yield the expected result. Instead of dithered it gives us a thresholded black and white image. I found very little information about the dithering hint while googling and searching the forums, except people asking how to turn it off ;-)
Now my question is, should the pseudo code below work ?
<--- code snippet --->
byte[] map = {(byte)0xFF, (byte)0x00};
final BufferedImage buf = new BufferedImage(Math.round(fWidth*scale), Math.round(fHeight*scale), BufferedImage.TYPE_BYTE_BINARY, new IndexColorModel(1,2,map,map,map));
final Graphics2D g2 = (Graphics2D)buf.getGraphics();
g2.setRenderingHint(RenderingHints.KEY_DITHERING,RenderingHints.VALUE_DITHER_ENABLE);
g2.scale(scale,scale);
fChart.setGraphics2D(g2);
fChart.render();
return buf;
<--- code snippet --->
For reference we are using jdk 1.4.2_08 and any solution should work in java.awt.headless mode.
Any feedback is highly appreciated
Best regards,
Erik
---------
Erik Vanherck - Product Delivery Manager
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