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Raster Scrolling

General and Desktop

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mrsmd

wrote on last edited by

#1

I have a program that draws a scrolling spectrogram. To do the scrolling, we simply do a drawImage of the last image starting at scanline 1 and then add the pixels for scanline 0.

Is there a faster/more efficient way to scroll a QImage (in hardware)?
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dangelog

wrote on last edited by

#2

I'm not even sure what do you mean with "scrolling spectogram". Do you have an example?
Software Engineer
KDAB (UK) Ltd., a KDAB Group company
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mrsmd

wrote on last edited by

#3

A waterfall plot
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