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thumbnails with jpg´s very slowly

 
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EccoBravo



Joined: 03 Nov 2006
Posts: 6

PostPosted: Thu Mar 05, 2009 12:26 pm    Post subject: thumbnails with jpg´s very slowly Reply with quote

Hello,

I programmed a project for foto picture selection using thumbnail component of SDL.
Unfortunatly the thumbnail operates very very slowly with jpegs.

What can I do for accelerating the jpg-thumbnail operation?

Many thanks and regards from Eastern Germany

EB
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hlohning



Joined: 08 Sep 2006
Posts: 277
Location: Austria

PostPosted: Thu Mar 05, 2009 3:11 pm    Post subject: Reply with quote

Hi EB,

do you load the full-size photos directly or from reduced slide files? If you load them directly, the thumbnail grid becomes very slow since every photo has to be rescaled when it is to be displayed as a thumbnail.

I used the thumbnail component in the PhotoGlobe Explorer project using scaled thumbnail images as input to the TThumbNail component (much the same as do other popular graphics programs). If you want to test the speed of the thumbnail display in PG Explorer, here's the URL:

http://www.photoglobe-explorer.info/en_home.html

Regards,

Hans
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Hans Lohninger
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