High CPU usage when redrawing smooth-scaled image

HaikuArchives / TheAwesomeResizer

Allows quick dynamic resizing of any translator-supported image.

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High CPU usage when redrawing smooth-scaled image #9

Open humdingerb opened 6 years ago

humdingerb commented 6 years ago

Maybe the high CPU usage when resizing, compared to ShowImage, is the same reason for this:

Down-scale an image with smooth scaling activated
Wave another window in front of the image

Watch the CPU usage with ActivityMonitor spike. It isn't when smooth-scaling is deactivated. Is it filtering the whole image everytime the waved window reveals a formerly hidden area of the image?

janus2 commented 6 years ago

The scaling is expensive was implemented in that way for a reason...

janus2 commented 6 years ago

I forgot the view is double buffered so even more expensive