Scroll speed problem

[irab]

Hi Loïc!

I have some problem with speed of scroll. (I use integrated VGA.)

Basic settings:

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Me.GdViewer1.ViewerQuality = ViewerQualityBilinearHQ
Me.GdViewer1.ScrollOptimization = True
Me.GdViewer1.DisplayFromFile ("c:\test.tif")


Scroll speed is good (if zoom >= 100):

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Me.GdViewer1.ZoomMode = Zoom100

Scroll speed is very slow (if zoom < 100) - In this case, the movement of the picture is also slow :

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Me.GdViewer1.ZoomMode = ZoomWidthControl

Could you solve this problem without change ViewerQuality property?

Thank you in advance.

Best regards,
Irab

[Loïc]

Hi irab,

This behavior is due to interpolation algorithm which is a performance consumer.

To improve scrolling speed you can do:

- turn the OptimizeDrawingSpeed property to True
- And/OR: turn the ViewerQualityAuto property to True

Kind regards,

Loïc