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Desktop Wallpaper window - Image scaling bug?

rupertsland
54 discussion posts
Hi Jon.

In your latest update of DisplayFusion (3.1.8), I came across what appears to be a bug with the image scaling feature in the Desktop Wallpaper window. When I change the scale from 105% to 110%, the image in the preview gets smaller (when it should get bigger). When I reduce the image scale from 110% to 105%, the image in the preview gets bigger (when it should appear smaller). Is this a bug, or is it just me?

I'm using Windows XP Pro 32-bit with SP3.

I continue to enjoy using DisplayFusion.

Sincerely, Rupertsland
Canada
Mar 14, 2010  • #1
Jon Tackabury (BFS)'s profile on WallpaperFusion.com
I'm afraid I can't reproduce this bug, it works perfectly for me in Windows XP and Windows 7. Can you post screenshots showing the incorrect scaling @ 100%, 105% and 110%? Can you post more information that might be relevant as well? Thanks!
Mar 14, 2010  • #2
rupertsland
54 discussion posts
Hi Jon.

Attached are screenshots of the image scaling problem I encountered. The actual wallpaper image shown in the screenshot is 6144 x 4096 pixels. Rather large, but I wanted to see what it would look like. I tried other images (all JPEG's) and I got different results. For some images, there was no scaling problem. For others, the problem recurred at a different scaling percentage. One of those was a wallpaper image 2400 x 1800 pixels, and the scaling problem occurred at 120%.

If you compare screenshot images (2) and (4) below, you will see they look almost identical, and different from (3). Compare images (5) and (7) - both appear the same, but different from (6). In other words, (3) appears slightly more zoomed out when one increases the scaling, wherease (6) is slightly more zoomed in when one decreases the scaling.

Rupertsland
• Attachment: (1) Start at 100.png [210,309 bytes]
(1) Start at 100.png
(1) Start at 100.png
• Attachment: (2) increase from 100 to 105.png [212,731 bytes]
(2) increase from 100 to 105.png
(2) increase from 100 to 105.png
• Attachment: (3) increase from 105 to 110 (problem).png [212,903 bytes]
(3) increase from 105 to 110 (problem).png
(3) increase from 105 to 110 (problem).png
• Attachment: (4) increase from 110 to 115.png [213,010 bytes]
(4) increase from 110 to 115.png
(4) increase from 110 to 115.png
• Attachment: (5) decrease from 115 to 110.png [212,959 bytes]
(5) decrease from 115 to 110.png
(5) decrease from 115 to 110.png
• Attachment: (6) decrease from 110 to 105 (problem).png [212,742 bytes]
(6) decrease from 110 to 105 (problem).png
(6) decrease from 110 to 105 (problem).png
• Attachment: (7) decrease from 105 to 100.png [210,368 bytes]
(7) decrease from 105 to 100.png
(7) decrease from 105 to 100.png
Mar 14, 2010  • #3
Jon Tackabury (BFS)'s profile on WallpaperFusion.com
I'm not sure how this didn't come up during testing, but I'm sorry for missing it. :( It turned out to be a rounding issue with the smaller values, and I've corrected the issue and done a re-pack. You can now re-download version 3.1.8 and the bug is gone:
http://www.binaryfortress.com/displayfusion/

Thanks for letting me know about this so quickly after the release! :)
Mar 14, 2010  • #4
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