[Bug 192] com.sun.image.codec.jpeg doesn't work with ImageJ

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=192


junk4me46806 at yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #91 is|0                           |1
           obsolete|                            |
  Attachment #92 is|0                           |1
           obsolete|                            |
  Attachment #93 is|0                           |1
           obsolete|                            |




------- Comment #16 from junk4me46806 at yahoo.com  2009-02-23 04:59 -------
Created an attachment (id=166)
 --> (http://icedtea.classpath.org/bugzilla/attachment.cgi?id=166&action=view)
Partial Implementation of com.sun.image.codec.jpeg which includes basic encode
functionality

I ran into this problem as well.  I started with the code from my icedtea
installation (which was Matthew's code with the headers changed).  After a few
days I arrived at the attached code containing a working encoder.  The
JPEGEncodeParam class is minimal and the only feature that it supports is
changing the quality (but who ever changes the encoding tables anyway?).

Also included is Matthew's decoder test code (with minor changes) and my test
code for the encoder (heavily copied from Matthew's decoder test).  The new
encoder worked on a sample image with the default quality (0.9) and a variable
quality.  It worked well for buffered images, but the color model for the
raster method was messed up (which makes sense, so I am going to call it
working).

I have made no attempt to merge this back into the icedtea tree.

As a final note, when debugging the jre always takes classes from the system
rt.jar if they are present and does not let a local class override this
behaviour.  I got around this by editing my rt.jar with file-roller to remove
the existing implementation and then adding my implementation when I was done. 
This is exceedingly ugly, but it did work.

I am running:
IcedTea6 1.4 (Gentoo) Runtime Environment (build 1.6.0_0-b14)
OpenJDK 64-Bit Server VM (build 14.0-b08, mixed mode)

Your mileage may vary.


-- 
Configure bugmail: http://icedtea.classpath.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.