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Old 03-02-2008, 06:47 AM   #1
Hodgkinson
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Default Problems with FastJPEG
Hi there,
I seem to be experiencing issues with fastJPEG on my A1200 system. When I scroll horizontally, (Stable) horizontal lines of varying lengths and colours appear from the left hand edge of the screen. These lines vary depending on how much I scroll (I’m guessing its something related to the content of the image), and disappear when I return to the left hand edge of an image.

Changing and swapping around screen modes (Inc VGAOnly) and mode promotion etc. doesn't seem to help.

Anyone any ideas?
Could this be hardware related?

Thanks,
Hodgkinson.
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Old 03-02-2008, 07:00 AM   #2
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Default Re: Problems with FastJPEG

This is normal behaviour of autoscroll HAM screens.

Bye,
Thomas
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Old 03-02-2008, 07:52 AM   #3
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Default Re: Problems with FastJPEG
It is? *phew*.

Out of interest, what actually causes this? Does it relate to the image being displayed?
TBH, I wouldn't of expected this to be *normal* behaviour on a system.


Thanks for the info,
Hodgkinson.
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Old 03-02-2008, 07:57 AM   #4
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Default Re: Problems with FastJPEG
Amiga Hold and Modify: Advantages and disadvantages
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Old 03-02-2008, 09:39 AM   #5
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Default Re: Problems with FastJPEG
Ah ha. Thanks for the link - It all makes sense now.

Always wondered what HAM meant.

If I used a datatype and a datatype viewer for jpg images, would the appearance of the artefact be dependant of whether the viewer/datatype was coded to display in HAM or not?

Ta,
Hodgkinson.
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