preview of bug:
http://fragilecrystal.fatal.ru/files/jpg_bug.7z
In 7z-archive file lies 6 image files.
1-4.jpg - it exactly the same files.
First file is save in Photoshop CS2 by 'Save for Web...' with parameters:
- Quality: 100 (Maximum)
- Progressive, ICC Profile and Optimized set to off.
- Blur: 0
- matte: none
5.jpg - it original file saved in XnView with parameters:
- Quality: Best (100)
- all checkbox is unchecked
- DCT Method: Slow
- Smoothing factor: 0
- SubSampling factor: 1x1, 1x1, 1x1 (best quality)
bug.png (PNG-24) - its printscreen of bug in 500% zoom.
Bug can be view if Options->View->Misc.->Cache 'Read one image ahead' is checked and view this files in Fullscreen mode ('Browser -> View in Fullscreen' not 'Browser -> Open -> Fullscreen').
Bug reproduction:
Open 1.jpg (or 2/3/4.jpg) in Fullscreen mode (best, if you before perform next step, Zoom image 500% or higher, Lock Zoom, and don't forget turn off all HQ zoom).
Jump to next file.
On next JPG I can view the 'white noise' (like JPG compress artifact) around raspberry color in right bottom part of image (and if stare - all image is changes).
5.jpg have additional 'white noise' over current.
If view images in reverse order (5,4,3,2,1) bug is not show (because, I think, 'Read one image ahead' not work in reverse view in Fullscreen mode [ http://newsgroup.xnview.com/viewtopic.php?t=14310 ]. This too bug).
Corrupted image save in temporary cache if 'Keep current image in cache' is checked.
This bug I can view on any JPG in Fullscreen mode, not only JPG I put to archive file (changes only degree of the noticeable 'change' on pictures).
It easy to see if images is exactly the same.
version XnView: 1.96
OS: WinXP SP2
I see this bug in 1.95.2 (and thinking, I notice him in previous versions).
I put my xnview.ini with images.
Ok I can reproduce this bug now.
