[Interest] About copying the image buffer with alpha blending

song.7.liu at nokia.com song.7.liu at nokia.com
Wed Aug 29 09:53:14 CEST 2012


We found that QPainer::drawImage takes 30~50ms for one 150*114 image, it seems a little slow.

One quick optimization to try is: we want to do the memory copy to the backing store buffer directly instead of using the PaintRasterEngine.
So from Qt, is there a helper function can copy the memory of image with alpha blending ?

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