image processing - Android rotate bitmap without making a copy -


is there way rotate bitmap without making copy of it? or maybe imageview that's holding bitmap? right i've got similar to:

bitmap bm = bitmapfactory.decodefile(... // orientation matrix m = new matrix m.postrotate(orientation) bitmap new = bitmap.createfrombitmap(bm, ..., m);

there algorithmically isnt easy way of performing rotation without separate new place put rotated copy, deleting current (non-rotated) copy. can think of potential algorithm have have 1 pixel' worth of memory have spend more time figuring out actual algorithm.

also @ stackoverflow link: algorithm rotate image 90 degrees in place? (no memory)


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