Please review at your convenience.

Issue:  https://bugs.openjdk.java.net/browse/JDK-8154075
Patch:  http://cr.openjdk.java.net/~bpb/8154075/webrev.00/

For banded images make sure the step in the horizontal differencing predictor 
calculations for Deflate and LZW compression is unity (1) instead of the number 
of samples per pixel.

This change was verified with the two images attached to the issue along with 
six 8 bits-per-sample images compressed using the horizontal differencing 
predictor and having the following characteristics:

1 - grayscale, single image plane, Deflate compression (created using tiffcp)
2 - grayscale, single image plane, LZW compression (created using tiffcp)
3 - RGB, separate image planes, Deflate compression (attached to issue)
4 - RGB, separate image planes, LZW compression (attached to issue)
5 - RGB, single image plane, Deflate compression (created using tiffcp)
6 - RGB, single image plane, LZW compression (created using tiffcp)

Thanks,

Brian

Reply via email to