Bug 153066

Summary:	Rotating JPEG images by 90° causes a strip from the top to be saved at the bottom
Product:	[Applications] gwenview	Reporter:	Adrien Cordonnier <adrien.cordonnier>
Component:	general	Assignee:	Gwenview Bugs <gwenview-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	adaptee, hamboy95, martin, myriam
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	495×334 JPEG image with gradient from black at top left to white at bottom right the file after rotating with gwenview

Description Adrien Cordonnier 2007-11-28 17:50:19 UTC

Version:            (using KDE KDE 3.5.8)
Installed from:    Ubuntu Packages

I choose from the context menu: "Actions->Transform image->Rotate 90° clockwise" on a JPEG image, the new file has the top strip shifted at the bottom of the image (actually on the right as it has been rotated).

The same behaviour happen when the JPEG image is rotated using the Gwenview preview and saved. The preview itself displays well after rotating but the saved image displays the bug. If using Gwenview not embedded in Konqueror, the image is well rotated.

The data are not completely corrupted as the reverse bug appears when turning the image 90° counterclockwise: then the strip comes at its initial position so does the orientation and the initial image is recovered.

Comment 1 Adrien Cordonnier 2007-11-28 18:49:41 UTC

After more testing, it appears it is a Gwenview bug.

The bug affects Gwenview as well. I did not see it at first because not every JPEG images display the bug which depends of the dimension ratio. For example, there is no such bug for a 640×480 image.

Here is a 495×334 JPEG image with gradient created with the Gimp. 
  1) Open the file with Gwenview
  2) Rotate the image 90° clockwise
  3) Save (Ctrl-S): a clear strip should appear on the right side
  4) Reverse the change: rotate the image 90° counterclockwise
  5) Save: the image should appear correctly again

Comment 2 Adrien Cordonnier 2007-11-28 18:52:32 UTC

Created attachment 22237 [details]
495×334 JPEG image with gradient from black at top left to white at bottom right

Comment 3 Martin Koller 2011-06-23 17:04:13 UTC

I tested with KDE 4.6.4 and gwenview 2.6.4, Qt 4.7.3 and can still reproduce mentioned problem. I attach a screenshot after doing:

gwenview /tmp/pic.jpg
rotate-right
save
quit gwenview
gwenview /tmp/pic.jpg

A testprogram using QImage doing the rotation and save does not show this bug.

Comment 4 Martin Koller 2011-06-23 17:05:53 UTC

Created attachment 61278 [details]
the file after rotating with gwenview

Comment 5 Mark S. 2011-12-30 06:25:18 UTC

Could this bug be related to bug 132352?

Comment 6 Myriam Schweingruber 2012-01-02 21:38:56 UTC

Indeed, this is the same bug, thanks for spotting!

*** This bug has been marked as a duplicate of bug 132352 ***