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Normal Topic Performance issue of large image node (Read 2045 times)
Kyle Chen
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Performance issue of large image node
Jul 18th, 2018 at 2:45am
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Hello Slavcho,

I'm facing a performance issue for large image node. The nodes' image might be assigned with a 25000x3000 bitmap. And there's some obvious lag in node operation like mouse dragging or resizing. Any suggestion on this kind of application?

Thanks,

Kyle Chen
  
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Slavcho
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Re: Performance issue of large image node
Reply #1 - Jul 18th, 2018 at 8:19am
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Hi Kyle,

It's as fast as Graphics.DrawImage can process it. Do you actually need to display the large image in full size in a very large node? If not, you could create a thumbnail from the original image and assign the thumbnail to node.Image instead. Otherwise we could try to draw images using a clip region, it could possibly speed drawing up when the node is not displayed entirely on screen (e.g. not zoomed to fit or inside overview control).

Regards,
Slavcho
  
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Kyle Chen
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Re: Performance issue of large image node
Reply #2 - Jul 18th, 2018 at 1:52pm
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Hi Slavcho,

Yes, I need to display the large image in full size and let use to resize the node.

Thanks,

Kyle


Slavcho wrote on Jul 18th, 2018 at 8:19am:
Hi Kyle,

It's as fast as Graphics.DrawImage can process it. Do you actually need to display the large image in full size in a very large node? If not, you could create a thumbnail from the original image and assign the thumbnail to node.Image instead. Otherwise we could try to draw images using a clip region, it could possibly speed drawing up when the node is not displayed entirely on screen (e.g. not zoomed to fit or inside overview control).

Regards,
Slavcho

  
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