Monitoring the Progress of a BufferedImageOp

Question

I just spent a couple of minutes figuring out how to do this and thought I might
share it with anyone who's interested.
Feel free to comment on, criticise, or improve on my approach.
java.awt.image.BufferedImage sourceImage = ...;
java.awt.image.BufferedImage targetImage = ...;
targetImage.getSource().addConsumer(new java.awt.image.ImageConsumer() {
   private int pixelsDrawn = 0;
   public void setPixels(...) {
      // Update the number of pixels drawn so far:
      pixelsDrawn += width * height;
      // TODO: Tell other objects (e.g. a JProgressBar) about the update.
java.awt.image.BufferedImageOp imageOp = ...;
imageOp.filter(sourceImage, targetImage);NOTES:
There are two setPixels() methods.
Though it is not clear in the Javadoc, I assume only one will ever be called for
a particular image source. Both still need to be implemented, however, on the
assumption that you don't know which one will be called for this source.
The Consumer seems to be notified one row at a time (with ConvolveOp, at least).

Answer 1

hi
I tried a similar approach, but i must tell you:
1. usually one line is scanned in each setPixel say line 1, then line 2.....
But for many filters these scanning is repeated several times, i.e. after all the lines has been scanned, the scanning is one again, i.e. line 1 is scanned again followed by the others. and this process is repeated 2-5 times depending on the filter.
So i don't think we can get the progress the filter that way.
If anyone got any good way to find the progress of a filter, please do let me know. my mailid is [email protected]
Tanveer