Bug 692507 - fts_43xx.xps
Summary: fts_43xx.xps
Status: NOTIFIED FIXED
Alias: None
Product: GhostXPS
Classification: Unclassified
Component: General (show other bugs)
Version: master
Hardware: PC All
: P2 normal
Assignee: Michael Vrhel
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-09-18 16:49 UTC by Marcos H. Woehrmann
Modified: 2011-11-09 18:32 UTC (History)
1 user (show)

See Also:
Customer: 661
Word Size: ---

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Marcos H. Woehrmann 2011-09-18 16:49:39 UTC 
The customer reports and I've verified that there are differences on the 4302a page.  The customer reports "they look like as they were 'colorized' and are not rendered with a photographical style.", I don't see that and have asked for clarification, but when converting the XPS to a png16m file I do see differences in some of the images (see the attached screenshot).

The command line I'm using:

  xpshead -sDEVICE=png16m -o test_%d.png ./fts_43xx.xps
Comment 2 Marcos H. Woehrmann 2011-09-18 16:56:34 UTC 
(In reply to comment #0)
> The customer reports "they look like as they were 'colorized' and are
> not rendered with a photographical style.",

Further examination of the files shows that when GhostXPS generates a monochrome raster there is posterization occurring. See test_4.png attached generated with:

  xpshead -sDEVICE=pngmono -o test_%d.png -r300 ./fts_43xx.xps
Comment 4 Michael Vrhel 2011-10-03 07:01:00 UTC 
I verified that this is from an issue in the interpolation of 16 bit images in gxiscale.c   16bit interpolated images from PDF files have a similar issue.  I will take care of this one.
Comment 5 Michael Vrhel 2011-10-04 06:42:03 UTC 
Fixed with http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=77e2fb25375f50389bfe6942507a0a513fa83ee9.  This results in a few progressions in the XPS FTS test files.