AWare Systems, , Home TIFF and LibTiff Mailing List Archive

LibTiff Mailing List

TIFF and LibTiff Mailing List Archive
May 1993

Previous Thread
Next Thread

Previous by Thread
Next by Thread

Previous by Date
Next by Date


The TIFF Mailing List Homepage
Archive maintained by AWare Systems

New Datamatrix section

Valid HTML 4.01!


1993.05.27 13:20 "modified version of xtiff.c", by Harald Lange
1993.06.21 17:51 "Re: modified version of xtiff.c", by Sam Leffler

1993.06.21 17:51 "Re: modified version of xtiff.c", by Sam Leffler

    To:      tiff@ucbvax.Berkeley.EDU
    Subject: modified version of xtiff.c
    From: (Harald Lange)
    Date:    Thu, 27 May 93 15:20:53 N

    we have used xtiff (Revision 2.0 90/12/20, actual version coming with TIFF
    3.21) for displaying RGB-images (24bit) on our Sun 4/370 (32bit
    TAAC-Framebuffer) under X-Windows, but the result was not satisfying. A little
    look to the source reveal some typing errors in the index-value of the
    pixel_map variable, which we have corrected.

    Another important change is the new name for the tagfield

No.  These tags are not interchangeable--the new TransferFunction
tag requires that you use the other new colorimetry-related tags
in calculating the corrected screen pixel values.  Please look
at the appropriate appendix in the 6.0 spec.

    Beyond that we have made the following expansions to xtiff:

    1.) Show Pagenumber Tagfield if present
    2.) Consider Fillorder Tagfield

FillOrder is handled by the TIFF library, so using it to
set the bit-order of the data that you hand to the X code
is wrong--unless you are reading raw data directly from the
file (which you do not appear to be doing).

    I think it is a good idea to make this corrected version available in the
    following TIFFLibrary Distribution. I have tried to mail these bug to Dan Sears
    directly, but the mail came back, because of unknown user

Dan&Chris Sears no longer work on Unix systems.  I include the
last version of xtiff that they provided me in the sources I
give away in the hope that someone will properly update it to
use the 6.0 tags.