How to rotarte a bitmap (BMP or Canvas)?

[Raffaele]

Anyone has idea how to rotate a displayed (big)image? the source is a
BMP (mono) file. I have tried with canvas read pixel / write point, but
is EXTREMELY slow (50 pixel/sec!!!!).
Thanks
Raf

[deli]

Try it in an array that is not the screen.

1) load in to an array
2) rotare array
3) copy array to screen