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remcoboerma / jbrout

Automatically exported from code.google.com/p/jbrout
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weird artifacts on full screen display #182

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. display a photo in full screen 
2. zoom in
3. zoom out

What is the expected output? What do you see instead?
Some weird artifacts (triangle shaped) appear on screen. These are always 
visible on rotated pictures, and only in zoom mode on original pictures. When 
viewed with qiv (for example) non of this appear, whatever the zoom factor. 

What version of the product are you using? On what operating system?
Using SVN version 328 on Ubuntu 10.10 amd64

Please provide any additional information below.
If I get a window (for example the add tag dialog) to move over the defects in 
full view, the defects disappear. It happens since I changed of computer (and 
fresh install of ubuntu of course), but I didn't notice anything similar with 
another soft. 
Included some screenshots (normal and zoom views of a rotated and an original 
image), if that may give any clue...

Original issue reported on code.google.com by chartier...@gmail.com on 20 May 2011 at 6:59

Attachments:

GoogleCodeExporter commented 9 years ago 
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GoogleCodeExporter commented 9 years ago 
I just noticed something new, yesterday: apparently, these artefacts appear on 
pictures recently rotated, but not on old ones, which were probably rotated 
with jpegtran/exiftool, and not with exiv2... besides, the artefacts are very 
slightly different when moving from one picture to another one, but seem to be 
the same when moving back... that might rule out a graphic board pb, no ?

I think that might deserve a closer examination and a few tests...

Original comment by chartier...@gmail.com on 31 May 2011 at 6:14

GoogleCodeExporter commented 9 years ago 
No more problem since I upgraded to ubuntu 12.04 amd64... It was probably a 
graphic card drive issue, as some pointed it out. It certainly also has to do 
with the border effect associated with lossless JPEG rotation, but...

Original comment by chartier...@gmail.com on 17 Sep 2012 at 11:56

GoogleCodeExporter commented 9 years ago 
Apparently got fixed somewhere on the way.

Original comment by matej.c...@gmail.com on 12 Aug 2013 at 10:27